2021 International Conference on Smart Generation Computing, Communication and Networking (SMART GENCON)
A static synchronous compensator (STATCOM) is among the greatest suggestive FACTS device which is... more A static synchronous compensator (STATCOM) is among the greatest suggestive FACTS device which is a promising and substantial technology used to compensate shunt reactive power to control in transmission and distribution networks. The voltage source converter based STATCOM controllers are commercially introduced for controlling the system dynamics under unstable conditions. In last decades, STATCOM has been proposed different control strategies with different converter schemes for enhancing the performance of voltage source converter. Cascade multilevel H-bridge converter gives improved performance and results compare to other converters. This paper gives a Hardware Execution of Five Level Inverter Based STATCOM With PI Control Using Smart Technique with reactive power compensation of the system. Here the approach is automatic adjustment with the inverter. The efficiency of a multilevel based five level cascade H-bridge type of VSC is utilized as the VSC of STATCOM, as VSC is the key element of STATCOM.
Advances in Intelligent Systems and Computing, 2020
Primarily, any electrical system is an assemblage of various electrical components which are inte... more Primarily, any electrical system is an assemblage of various electrical components which are interconnected in a specified manner to perform a specialized function. An electric system can be as simple as a torch on one hand and it can be as abstruse as a spacecraft, on the other. Detailed coverage of all these electrical systems is beyond the purview of this book and hence, a pragmatic review has been made to put together developments related to monitoring techniques of electrical power transmission systems here. This system performs a distinguishing role of ensuring reliable power supply for the utilization by consumers for various applications. The preponderance of faults can be minimized by monitoring certain critical parameters and predicting a fault before it is going to actually happen. In this chapter, an electric power transmission system is branched into Power Transformers, Transmission Lines, Power Transmission Towers and Protective Relays. The primarily focus has been laid to highlight perspective view on the techniques which assist in the development of health prognosis-based (or condition-based) maintenance tools and practices to safeguard the health of these systems in large interest of utilities.
2020 International Conference on Industry 4.0 Technology (I4Tech), 2020
Electric arc furnace transformers are of prime importance in steel mill transformers that are des... more Electric arc furnace transformers are of prime importance in steel mill transformers that are designed inherently to supply high magnitude currents. Traditional maintenance strategy for steel mill transformers involves performing an offline diagnostic test and computing health index and remnant life using mathematical aggregations. Stresses in a transformer can be due to an individual or multiple factors which may lead to its deterioration. In order to avoid premature failure, computation of health index and remnant life by online monitoring of arc furnace transformers is imperative. Based on the optimum selection of single and multi-parameter sensors, an architecture for online monitoring is discussed in this paper. Subsequently, dedicated fuzzy models for computation of criticalities of various components, the overall health index, and remnant life are developed in this research. Also, the decision logic is established to identify faulty components based on information collected by online sensors. Weighted fuzzy rules and color code for health indication are some of the additives which enhance the significance of the model. This research will be helpful for maintenance engineers and researchers involved with the maintenance and overhaul of furnace transformers.
2021 International Conference on Smart Generation Computing, Communication and Networking (SMART GENCON), 2021
A static synchronous compensator (STATCOM) is among the greatest suggestive FACTS device which is... more A static synchronous compensator (STATCOM) is among the greatest suggestive FACTS device which is a promising and substantial technology used to compensate shunt reactive power to control in transmission and distribution networks. The voltage source converter based STATCOM controllers are commercially introduced for controlling the system dynamics under unstable conditions. In last decades, STATCOM has been proposed different control strategies with different converter schemes for enhancing the performance of voltage source converter. Cascade multilevel H-bridge converter gives improved performance and results compare to other converters. This paper gives a Hardware Execution of Five Level Inverter Based STATCOM With PI Control Using Smart Technique with reactive power compensation of the system. Here the approach is automatic adjustment with the inverter. The efficiency of a multilevel based five level cascade H-bridge type of VSC is utilized as the VSC of STATCOM, as VSC is the ke...
2021 International Conference on Smart Generation Computing, Communication and Networking (SMART GENCON), 2021
Commonly Electric Arc Furnaces are employed in steel mills for heating raw metal to its melting p... more Commonly Electric Arc Furnaces are employed in steel mills for heating raw metal to its melting point using an electric arc, and to supply very high rated current usually in kA (kilo-Ampere) to this electric arc, specially designed transformers are being installed. This high current, electrode unbalanced positions result in fluctuating system load parameters, causing high stress on insulation, high current requirement, very unusual load patterns in the supplying transformer. Here I observing power quality problems in furnace steel plant by modeling visited steel mill system in MATLAB simulation. This paper shows how the position of the electrode will affect on steel mill transformer harmonics. Here, it is used for measuring the current, voltage profile, each harmonic and THD of an electric furnace in loading and unloading of scrap material.
2020 Fourth International Conference on Inventive Systems and Control (ICISC)
Transformers are preeminent units of any power transmission network which are prone to failures d... more Transformers are preeminent units of any power transmission network which are prone to failures due to multiple interrelated factors. For recognition of obscure failure modes leading to severe degradation of the transformer, internal inspection is a necessity. Submersible inspection robots are state of the art devices which are utilized for routine internal inspection of an oil filled transformer for identification, segmentation and assessment of faults. In this research paper, by using data from assorted diagnostic tests, a fuzzified computational algorithm is developed for determining the condition in which performing internal inspection is an absolute necessity. Particular attention is given to establish a decision logic for minimizing the work envelope of internal inspection robot by identifying likely faulty subsystems from diagnostic test results. This algorithm will further reduce the maintenance time and workload of the robot for performing internal inspection of the transformer. This paper will be helpful for researchers and service engineers involved with the maintenance of transformers.
Power transformers perform a pivotal role in a power system network in ensuring reliable power su... more Power transformers perform a pivotal role in a power system network in ensuring reliable power supply to electricity consumers. This paper contributes the concept about different types of transformer protection so that will be more helpful for investigating the protection system of the transformer. In this Paper, an effort is made to put together developments in the protection of the transformer. Efforts have been made to cover all the techniques and philosophies used to that end. The article includes the most recent techniques and traditional techniques of the transformer. There are many important parts installed in the transformer which is very costly so these have to be safe in an abnormal condition. Transformer performs a great job in the power system to change voltage and current level so proper protection for the transformer is important to maintain reliability in the system. Usually, a well-designed transformer protection system provides a great life without any uninterrupted...
2020 IEEE International Conference on Computing, Power and Communication Technologies (GUCON), 2020
Transformer malfunction has always been a major cause of concern for power utility companies. Tem... more Transformer malfunction has always been a major cause of concern for power utility companies. Temperature is one of the best-recognized indicators of health. Infrared Thermal Imaging is a standardized heat signature modeling tool. As of contemporary setting, thermal imaging has become a mature and highly regarded method of condition monitoring, in which temperature measurements can be conducted in real-time in a non-contact manner. Infrared thermography is used as a means to distinguish variations from the normal temperature range, within the transformer. Slight temperature fluctuations are appropriate, but any unusual change must be recognized, which may be a sign of possible failure and must be handled promptly. Unusually high temperatures will damage the insulation of the transformer and thereby reduce its life span. This paper outlines an approach to diagnosis, calculation of per-unit life, and impact of aging due to abnormal temperature on transformer winding which would help p...
2020 Fourth International Conference on Inventive Systems and Control (ICISC), 2020
Transformers are preeminent units of any power transmission network which are prone to failures d... more Transformers are preeminent units of any power transmission network which are prone to failures due to multiple interrelated factors. For recognition of obscure failure modes leading to severe degradation of the transformer, internal inspection is a necessity. Submersible inspection robots are state of the art devices which are utilized for routine internal inspection of an oil filled transformer for identification, segmentation and assessment of faults. In this research paper, by using data from assorted diagnostic tests, a fuzzified computational algorithm is developed for determining the condition in which performing internal inspection is an absolute necessity. Particular attention is given to establish a decision logic for minimizing the work envelope of internal inspection robot by identifying likely faulty subsystems from diagnostic test results. This algorithm will further reduce the maintenance time and workload of the robot for performing internal inspection of the transfo...
2020 International Conference on Electrical and Electronics Engineering (ICE3), 2020
Failure mode and effects analysis is a compelling tool for boosting the reliability of a power sy... more Failure mode and effects analysis is a compelling tool for boosting the reliability of a power system network. In this paper, a maintenance strategy is proposed based on the prioritization of maintenance work as per the fuzzy values of risk priority number. The fuzzified approach for the computation of risk assessment uproots the paradoxical behavior of the traditional approach under certain circumstances. Failure modes of each component of a transformer are identified and then occurrence, severity, and detection ratings are assigned for the development of a fuzzy inference system. Based on the input data set, the output surface plots for various parameters are plotted which is subsequently used for maintenance prioritization and suggesting recommended actions. Particular attention is given to the comparison between risk priority number values before and after maintenance or overhaul is performed. This paper will be helpful for researchers and utilities working on the development of...
Primarily, any electrical system is an assemblage of various electrical components which are inte... more Primarily, any electrical system is an assemblage of various electrical components which are interconnected in a specified manner to perform a specialized function. An electric system can be as simple as a torch on one hand and it can be as abstruse as a spacecraft, on the other. Detailed coverage of all these electrical systems is beyond the purview of this book and hence, a pragmatic review has been made to put together developments related to monitoring techniques of electrical power transmission systems here. This system performs a distinguishing role of ensuring reliable power supply for the utilization by consumers for various applications. The preponderance of faults can be minimized by monitoring certain critical parameters and predicting a fault before it is going to actually happen. In this chapter, an electric power transmission system is branched into Power Transformers, Transmission Lines, Power Transmission Towers and Protective Relays. The primarily focus has been lai...
2020 4th International Conference on Intelligent Computing and Control Systems (ICICCS), 2020
Preponderance of failures in a generator is due to excitation failure, thus it is pertinent to un... more Preponderance of failures in a generator is due to excitation failure, thus it is pertinent to understand these failures, their reasons and ways to mitigate these failure modes. Failure mode and effect analysis is an ingrained tool that helps in increased availability and reliability of small hydropower plants. In this research, a FIS based methodology has been proposed to identify failure modes and prioritize maintenance action by calculating the Risk priority number. This calculation facilitates the utility to take preventive measures and ensure a safer and more reliable operation of the alternator in the powerhouse. This fuzzified approach to FMEA is a de viation from the traditional approach that gives a more tolerable range of RPN values by eliminating the role of human experts in maintenance prioritization. The model is implemented on a set of failure modes and an FMEA sheet is developed. The paper will be helpful for utilities and researchers involved with the operation and m...
2020 IEEE International Conference on Computing, Power and Communication Technologies (GUCON), 2020
Transformers are strikingly reliable power transfer devices and are of preeminent importance in t... more Transformers are strikingly reliable power transfer devices and are of preeminent importance in the seamless operation of electric arc furnaces. An arc furnace transformer is at a monophonic risk of failure due to the action of different stresses. Reliability is a decisive performance index to ensure that a component will perform the desired function at the coveted time. In this research, beginning with the development of a combined fault tree for arc furnace transformers, a straightforward and conceivable software model is developed to assess reliability. The model incorporates MATLAB Simulink and Fuzzy toolbox for reliability computation and assigning a fuzzified reliability level. Subsequently, reliability indices like availability, unavailability, etc. are computed. Finally, the model is implemented for electric arc furnace transformers installed in different locations of India. This research will be helpful for utilities and researchers associated with enhancing the reliability...
2019 International Conference on Advances in Computing, Communication and Control (ICAC3), 2019
Transformers are lavish machines installed in a power system that is inherently designed to have ... more Transformers are lavish machines installed in a power system that is inherently designed to have high efficiency and reliability. But transformers contain inflammable oil in the vicinity of high voltage elements, which if mishandled, may result in transformer failures and catastrophic explosions. Thus, to enhance the safety and reliability of a transformer, its health assessment is imperative. For this purpose, Health index is an apt indicator. But traditional health index computational techniques have certain limitations which are surmounted using the approach mentioned in this research paper. The computational algorithm used to develop a fuzzy model in this paper eliminates need of a diagnostic expert and have the capability to assess arbitrarily complex diagnostic test results. A decision logic is established to select the non-routine diagnostic tests to be performed by assessing routine test results. Particular attention is given to take into account the effect of factors like o...
Electric arc furnace transformers are of prime importance in steel mill transformers that are des... more Electric arc furnace transformers are of prime importance in steel mill transformers that are designed inherently to supply high magnitude currents. Traditional maintenance strategy for steel mill transformers involves performing an offline diagnostic test and computing health index and remnant life using mathematical aggregations. Stresses in a transformer can be due to an individual or multiple factors which may lead to its deterioration. In order to avoid premature failure, computation of health index and remnant life by online monitoring of arc furnace transformers is imperative. Based on the optimum selection of single and multi-parameter sensors, an architecture for online monitoring is discussed in this paper. Subsequently, dedicated fuzzy models for computation of criticalities of various components, the overall health index, and remnant life are developed in this research. Also, the decision logic is established to identify faulty components based on information collected b...
The Piedmont Zone of the Indo-Gangetic Plain contains numerous, laterally coalescing small alluvi... more The Piedmont Zone of the Indo-Gangetic Plain contains numerous, laterally coalescing small alluvial fans. The Latest Pleistocene–Holocene 30 km long Gaula Fan can be divided into gravelly proximal fan (0–14 km down-stream), gravel-sand rich mid fan (14–22 km) and sand–mud dominated distal fan (22–30 km). The fan succession is composed of two fan expansion cycles A and B. Separated by an undulatory erosional contact of regional extent, cycle A is characterized by river borne clast-supported gravelly deposits, and the overlying fan expansion cycle B by matrix-supported gravely debris flows. The main process behind fan development has been lateral migration of channels over the fan surface probably due to rapid sedimentation caused by increased sediment supply, and the fluctuating water budget in response to changing climate. The water laid expansion cycle A represents a humid phase. The debris flow deposits of expansion cycle B suggest a dry phase. Approximately between 8 and 3 Ka, cycle B also indicates a phase of tectonic instability in the Siwalik Hills forming the mountain front. The tectonic activity caused incision of rivers into the fan surface, and in turn resulted in reduced fan-building activity. At present the fan surface is accreting by sheet flow processes.
2021 International Conference on Smart Generation Computing, Communication and Networking (SMART GENCON)
A static synchronous compensator (STATCOM) is among the greatest suggestive FACTS device which is... more A static synchronous compensator (STATCOM) is among the greatest suggestive FACTS device which is a promising and substantial technology used to compensate shunt reactive power to control in transmission and distribution networks. The voltage source converter based STATCOM controllers are commercially introduced for controlling the system dynamics under unstable conditions. In last decades, STATCOM has been proposed different control strategies with different converter schemes for enhancing the performance of voltage source converter. Cascade multilevel H-bridge converter gives improved performance and results compare to other converters. This paper gives a Hardware Execution of Five Level Inverter Based STATCOM With PI Control Using Smart Technique with reactive power compensation of the system. Here the approach is automatic adjustment with the inverter. The efficiency of a multilevel based five level cascade H-bridge type of VSC is utilized as the VSC of STATCOM, as VSC is the key element of STATCOM.
Advances in Intelligent Systems and Computing, 2020
Primarily, any electrical system is an assemblage of various electrical components which are inte... more Primarily, any electrical system is an assemblage of various electrical components which are interconnected in a specified manner to perform a specialized function. An electric system can be as simple as a torch on one hand and it can be as abstruse as a spacecraft, on the other. Detailed coverage of all these electrical systems is beyond the purview of this book and hence, a pragmatic review has been made to put together developments related to monitoring techniques of electrical power transmission systems here. This system performs a distinguishing role of ensuring reliable power supply for the utilization by consumers for various applications. The preponderance of faults can be minimized by monitoring certain critical parameters and predicting a fault before it is going to actually happen. In this chapter, an electric power transmission system is branched into Power Transformers, Transmission Lines, Power Transmission Towers and Protective Relays. The primarily focus has been laid to highlight perspective view on the techniques which assist in the development of health prognosis-based (or condition-based) maintenance tools and practices to safeguard the health of these systems in large interest of utilities.
2020 International Conference on Industry 4.0 Technology (I4Tech), 2020
Electric arc furnace transformers are of prime importance in steel mill transformers that are des... more Electric arc furnace transformers are of prime importance in steel mill transformers that are designed inherently to supply high magnitude currents. Traditional maintenance strategy for steel mill transformers involves performing an offline diagnostic test and computing health index and remnant life using mathematical aggregations. Stresses in a transformer can be due to an individual or multiple factors which may lead to its deterioration. In order to avoid premature failure, computation of health index and remnant life by online monitoring of arc furnace transformers is imperative. Based on the optimum selection of single and multi-parameter sensors, an architecture for online monitoring is discussed in this paper. Subsequently, dedicated fuzzy models for computation of criticalities of various components, the overall health index, and remnant life are developed in this research. Also, the decision logic is established to identify faulty components based on information collected by online sensors. Weighted fuzzy rules and color code for health indication are some of the additives which enhance the significance of the model. This research will be helpful for maintenance engineers and researchers involved with the maintenance and overhaul of furnace transformers.
2021 International Conference on Smart Generation Computing, Communication and Networking (SMART GENCON), 2021
A static synchronous compensator (STATCOM) is among the greatest suggestive FACTS device which is... more A static synchronous compensator (STATCOM) is among the greatest suggestive FACTS device which is a promising and substantial technology used to compensate shunt reactive power to control in transmission and distribution networks. The voltage source converter based STATCOM controllers are commercially introduced for controlling the system dynamics under unstable conditions. In last decades, STATCOM has been proposed different control strategies with different converter schemes for enhancing the performance of voltage source converter. Cascade multilevel H-bridge converter gives improved performance and results compare to other converters. This paper gives a Hardware Execution of Five Level Inverter Based STATCOM With PI Control Using Smart Technique with reactive power compensation of the system. Here the approach is automatic adjustment with the inverter. The efficiency of a multilevel based five level cascade H-bridge type of VSC is utilized as the VSC of STATCOM, as VSC is the ke...
2021 International Conference on Smart Generation Computing, Communication and Networking (SMART GENCON), 2021
Commonly Electric Arc Furnaces are employed in steel mills for heating raw metal to its melting p... more Commonly Electric Arc Furnaces are employed in steel mills for heating raw metal to its melting point using an electric arc, and to supply very high rated current usually in kA (kilo-Ampere) to this electric arc, specially designed transformers are being installed. This high current, electrode unbalanced positions result in fluctuating system load parameters, causing high stress on insulation, high current requirement, very unusual load patterns in the supplying transformer. Here I observing power quality problems in furnace steel plant by modeling visited steel mill system in MATLAB simulation. This paper shows how the position of the electrode will affect on steel mill transformer harmonics. Here, it is used for measuring the current, voltage profile, each harmonic and THD of an electric furnace in loading and unloading of scrap material.
2020 Fourth International Conference on Inventive Systems and Control (ICISC)
Transformers are preeminent units of any power transmission network which are prone to failures d... more Transformers are preeminent units of any power transmission network which are prone to failures due to multiple interrelated factors. For recognition of obscure failure modes leading to severe degradation of the transformer, internal inspection is a necessity. Submersible inspection robots are state of the art devices which are utilized for routine internal inspection of an oil filled transformer for identification, segmentation and assessment of faults. In this research paper, by using data from assorted diagnostic tests, a fuzzified computational algorithm is developed for determining the condition in which performing internal inspection is an absolute necessity. Particular attention is given to establish a decision logic for minimizing the work envelope of internal inspection robot by identifying likely faulty subsystems from diagnostic test results. This algorithm will further reduce the maintenance time and workload of the robot for performing internal inspection of the transformer. This paper will be helpful for researchers and service engineers involved with the maintenance of transformers.
Power transformers perform a pivotal role in a power system network in ensuring reliable power su... more Power transformers perform a pivotal role in a power system network in ensuring reliable power supply to electricity consumers. This paper contributes the concept about different types of transformer protection so that will be more helpful for investigating the protection system of the transformer. In this Paper, an effort is made to put together developments in the protection of the transformer. Efforts have been made to cover all the techniques and philosophies used to that end. The article includes the most recent techniques and traditional techniques of the transformer. There are many important parts installed in the transformer which is very costly so these have to be safe in an abnormal condition. Transformer performs a great job in the power system to change voltage and current level so proper protection for the transformer is important to maintain reliability in the system. Usually, a well-designed transformer protection system provides a great life without any uninterrupted...
2020 IEEE International Conference on Computing, Power and Communication Technologies (GUCON), 2020
Transformer malfunction has always been a major cause of concern for power utility companies. Tem... more Transformer malfunction has always been a major cause of concern for power utility companies. Temperature is one of the best-recognized indicators of health. Infrared Thermal Imaging is a standardized heat signature modeling tool. As of contemporary setting, thermal imaging has become a mature and highly regarded method of condition monitoring, in which temperature measurements can be conducted in real-time in a non-contact manner. Infrared thermography is used as a means to distinguish variations from the normal temperature range, within the transformer. Slight temperature fluctuations are appropriate, but any unusual change must be recognized, which may be a sign of possible failure and must be handled promptly. Unusually high temperatures will damage the insulation of the transformer and thereby reduce its life span. This paper outlines an approach to diagnosis, calculation of per-unit life, and impact of aging due to abnormal temperature on transformer winding which would help p...
2020 Fourth International Conference on Inventive Systems and Control (ICISC), 2020
Transformers are preeminent units of any power transmission network which are prone to failures d... more Transformers are preeminent units of any power transmission network which are prone to failures due to multiple interrelated factors. For recognition of obscure failure modes leading to severe degradation of the transformer, internal inspection is a necessity. Submersible inspection robots are state of the art devices which are utilized for routine internal inspection of an oil filled transformer for identification, segmentation and assessment of faults. In this research paper, by using data from assorted diagnostic tests, a fuzzified computational algorithm is developed for determining the condition in which performing internal inspection is an absolute necessity. Particular attention is given to establish a decision logic for minimizing the work envelope of internal inspection robot by identifying likely faulty subsystems from diagnostic test results. This algorithm will further reduce the maintenance time and workload of the robot for performing internal inspection of the transfo...
2020 International Conference on Electrical and Electronics Engineering (ICE3), 2020
Failure mode and effects analysis is a compelling tool for boosting the reliability of a power sy... more Failure mode and effects analysis is a compelling tool for boosting the reliability of a power system network. In this paper, a maintenance strategy is proposed based on the prioritization of maintenance work as per the fuzzy values of risk priority number. The fuzzified approach for the computation of risk assessment uproots the paradoxical behavior of the traditional approach under certain circumstances. Failure modes of each component of a transformer are identified and then occurrence, severity, and detection ratings are assigned for the development of a fuzzy inference system. Based on the input data set, the output surface plots for various parameters are plotted which is subsequently used for maintenance prioritization and suggesting recommended actions. Particular attention is given to the comparison between risk priority number values before and after maintenance or overhaul is performed. This paper will be helpful for researchers and utilities working on the development of...
Primarily, any electrical system is an assemblage of various electrical components which are inte... more Primarily, any electrical system is an assemblage of various electrical components which are interconnected in a specified manner to perform a specialized function. An electric system can be as simple as a torch on one hand and it can be as abstruse as a spacecraft, on the other. Detailed coverage of all these electrical systems is beyond the purview of this book and hence, a pragmatic review has been made to put together developments related to monitoring techniques of electrical power transmission systems here. This system performs a distinguishing role of ensuring reliable power supply for the utilization by consumers for various applications. The preponderance of faults can be minimized by monitoring certain critical parameters and predicting a fault before it is going to actually happen. In this chapter, an electric power transmission system is branched into Power Transformers, Transmission Lines, Power Transmission Towers and Protective Relays. The primarily focus has been lai...
2020 4th International Conference on Intelligent Computing and Control Systems (ICICCS), 2020
Preponderance of failures in a generator is due to excitation failure, thus it is pertinent to un... more Preponderance of failures in a generator is due to excitation failure, thus it is pertinent to understand these failures, their reasons and ways to mitigate these failure modes. Failure mode and effect analysis is an ingrained tool that helps in increased availability and reliability of small hydropower plants. In this research, a FIS based methodology has been proposed to identify failure modes and prioritize maintenance action by calculating the Risk priority number. This calculation facilitates the utility to take preventive measures and ensure a safer and more reliable operation of the alternator in the powerhouse. This fuzzified approach to FMEA is a de viation from the traditional approach that gives a more tolerable range of RPN values by eliminating the role of human experts in maintenance prioritization. The model is implemented on a set of failure modes and an FMEA sheet is developed. The paper will be helpful for utilities and researchers involved with the operation and m...
2020 IEEE International Conference on Computing, Power and Communication Technologies (GUCON), 2020
Transformers are strikingly reliable power transfer devices and are of preeminent importance in t... more Transformers are strikingly reliable power transfer devices and are of preeminent importance in the seamless operation of electric arc furnaces. An arc furnace transformer is at a monophonic risk of failure due to the action of different stresses. Reliability is a decisive performance index to ensure that a component will perform the desired function at the coveted time. In this research, beginning with the development of a combined fault tree for arc furnace transformers, a straightforward and conceivable software model is developed to assess reliability. The model incorporates MATLAB Simulink and Fuzzy toolbox for reliability computation and assigning a fuzzified reliability level. Subsequently, reliability indices like availability, unavailability, etc. are computed. Finally, the model is implemented for electric arc furnace transformers installed in different locations of India. This research will be helpful for utilities and researchers associated with enhancing the reliability...
2019 International Conference on Advances in Computing, Communication and Control (ICAC3), 2019
Transformers are lavish machines installed in a power system that is inherently designed to have ... more Transformers are lavish machines installed in a power system that is inherently designed to have high efficiency and reliability. But transformers contain inflammable oil in the vicinity of high voltage elements, which if mishandled, may result in transformer failures and catastrophic explosions. Thus, to enhance the safety and reliability of a transformer, its health assessment is imperative. For this purpose, Health index is an apt indicator. But traditional health index computational techniques have certain limitations which are surmounted using the approach mentioned in this research paper. The computational algorithm used to develop a fuzzy model in this paper eliminates need of a diagnostic expert and have the capability to assess arbitrarily complex diagnostic test results. A decision logic is established to select the non-routine diagnostic tests to be performed by assessing routine test results. Particular attention is given to take into account the effect of factors like o...
Electric arc furnace transformers are of prime importance in steel mill transformers that are des... more Electric arc furnace transformers are of prime importance in steel mill transformers that are designed inherently to supply high magnitude currents. Traditional maintenance strategy for steel mill transformers involves performing an offline diagnostic test and computing health index and remnant life using mathematical aggregations. Stresses in a transformer can be due to an individual or multiple factors which may lead to its deterioration. In order to avoid premature failure, computation of health index and remnant life by online monitoring of arc furnace transformers is imperative. Based on the optimum selection of single and multi-parameter sensors, an architecture for online monitoring is discussed in this paper. Subsequently, dedicated fuzzy models for computation of criticalities of various components, the overall health index, and remnant life are developed in this research. Also, the decision logic is established to identify faulty components based on information collected b...
The Piedmont Zone of the Indo-Gangetic Plain contains numerous, laterally coalescing small alluvi... more The Piedmont Zone of the Indo-Gangetic Plain contains numerous, laterally coalescing small alluvial fans. The Latest Pleistocene–Holocene 30 km long Gaula Fan can be divided into gravelly proximal fan (0–14 km down-stream), gravel-sand rich mid fan (14–22 km) and sand–mud dominated distal fan (22–30 km). The fan succession is composed of two fan expansion cycles A and B. Separated by an undulatory erosional contact of regional extent, cycle A is characterized by river borne clast-supported gravelly deposits, and the overlying fan expansion cycle B by matrix-supported gravely debris flows. The main process behind fan development has been lateral migration of channels over the fan surface probably due to rapid sedimentation caused by increased sediment supply, and the fluctuating water budget in response to changing climate. The water laid expansion cycle A represents a humid phase. The debris flow deposits of expansion cycle B suggest a dry phase. Approximately between 8 and 3 Ka, cycle B also indicates a phase of tectonic instability in the Siwalik Hills forming the mountain front. The tectonic activity caused incision of rivers into the fan surface, and in turn resulted in reduced fan-building activity. At present the fan surface is accreting by sheet flow processes.
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Papers by Arush Singh