A pressing concern in modern smart grid systems revolves around islanding, leading to unpredictab... more A pressing concern in modern smart grid systems revolves around islanding, leading to unpredictable system parameters and a decline in power quality. In response to this concern, we introduce a novel passive method for identifying islanding in grid-connected distributed generation units. This method utilizes the unscented Kalman filter (UKF) to assess the voltage signal captured at the DG position. The triphase voltage signal observed at the point of common coupling (PCC) is used as the test signal. The UKF extracts and filters the harmonic content of the voltage signal to produce a residual signal, which detects changes in the power system. The estimation of total harmonic distortion (THD) follows, and its fluctuations help discern between islanding and typical events. This suggested approach undergoes assessment through a test system simulated in MATLAB/Simulink across different situations. Outcome findings underscore the efficacy of the suggested approach in distinguishing betwee...
International Transactions on Electrical Energy Systems
Power management in advanced grid systems requires the seamless integration of diverse renewable ... more Power management in advanced grid systems requires the seamless integration of diverse renewable energy sources. This study investigates the optimization of a grid-connected system comprising a photovoltaic (PV) solar panel, energy storage system, fuel cell (FC), and diesel generator (DG) using the bioinspired metaheuristic technique called jellyfish optimization (JF). The objective is to maximize power generation from the PV system under normal and partial shading conditions. The performance of JF is compared against particle swarm optimization (PSO) using various parameters. As India heavily relies on solar PV, the results highlight JF’s exceptional effectiveness in extracting maximum power during partial shading scenarios. Inspired by the active and passive motions of jellyfish in the ocean, the JF algorithm is utilized. To further optimize the power output, the system is integrated with an efficient battery management system, PEM fuel cell stacking, and diesel generators. The sy...
In current scenario islanding in smart grid a big challenge that results, in various uncertaintie... more In current scenario islanding in smart grid a big challenge that results, in various uncertainties in the system parameters, also leads to degrade the power quality (PQ), and can also become threat to the maintenance workers. In this study a new passive islanding detection technique for grid-connected distributed generation (DG) units is proposed. The presented method employs an Unscented Kalman filter (UKF) to extract and filter the harmonic contents of the voltage signal measured at DG end. A three-phase voltage signal is measured at PCC (point of common coupling) and then it be taken as a test signal for analysis of islanding event detection. Here, at first a residual signal is produced using UKF to detect the changes occurring in the power system. Then, at second step, a total harmonic distortion (THD) is estimated by the UKF). The variation of THD classifies between islanding events and normal events. The IEEE 9-bus test system simulated in Matlab/Simulink is used as a test bed...
Transportation Research Record: Journal of the Transportation Research Board, 2017
The District of Columbia is enjoying rapid growth in cycling, evident through trends in census mo... more The District of Columbia is enjoying rapid growth in cycling, evident through trends in census mode share data and in the presence of more cyclists out on the street. The District Department of Transportation (DOT) has spent significant resources in the past two decades to improve active transportation planning, outreach, and infrastructure delivery. These efforts have led to the District’s recognition as a cycling-friendly city. Now the District DOT is taking stock of what has been done to improve cycling thus far and to determine what to do next. The District DOT is starting to ask what is driving the growth in the cycling mode share. How can the District understand, nurture, and expand on that growth in the cycling mode share? This study explored underlying relationships in which the District’s cycling mode share was present. The analysis dug deeply by doing (a) a statistical analysis to identify key factors that influenced cycling and (b) a spatial analysis that defined trends in accessibility to cycling facilities and the mobility of the cycling network. Findings from this research will help inform District DOT planners on what policy, operational, outreach, and capital investment levers to consider as they continue to promote cycling in the District going forward.
International Journal of Renewable Energy Research, 2017
There is an unstable situation in Yemen which causes a complete darkness and a nearly stops the b... more There is an unstable situation in Yemen which causes a complete darkness and a nearly stops the basic services due to power outages in the country because of the political and financial problems experienced by the country nowadays. Even though Yemen is one of the richest countries in the world in renewable energy sources (solar energy), with over three thousand hours per year clean blue sky. Under the financial and political crisis, Yemen suffers from problems in the availability of petroleum products which required to generate electric power using diesel generators. This paper aims to provide renewable energy as a suitable solution as well as a clean and environmental friendly energy. It also aims to reduce the uses of diesel-generator electric and presents the effective and efficient use of solar energy as alternative renewable energy for electrification of the necessary government facilities as (important ministries’ buildings, hospitals, schools and universities). Which will lea...
Active development of green energy and the continuous major problems in Yemen power sector lead t... more Active development of green energy and the continuous major problems in Yemen power sector lead to serious issues related to the load demand and civilization of the country. This issue requires particular strategies to be incorporated to maintain necessities of electrical power among green energy resources and utility grid. This paper presents an algorithm for power management in grid-connected hybrid renewable energy system under a set of constraints, including the special country situations, weather conditions, and utility grid situations. To manage the flow of power between the different loads (first, second, and third load) and the multi-agents; (utility grid and green energy resources) fuzzy smart controller is used. Proposed techniques fuzzify all the inputs and perform fuzzification of the rules from fuzzy outputs before defuzzification stage. The proposed smart control strategy is able to sense the parameter’s fluctuations in hybrid renewable energy generation, grid situatio...
A pressing concern in modern smart grid systems revolves around islanding, leading to unpredictab... more A pressing concern in modern smart grid systems revolves around islanding, leading to unpredictable system parameters and a decline in power quality. In response to this concern, we introduce a novel passive method for identifying islanding in grid-connected distributed generation units. This method utilizes the unscented Kalman filter (UKF) to assess the voltage signal captured at the DG position. The triphase voltage signal observed at the point of common coupling (PCC) is used as the test signal. The UKF extracts and filters the harmonic content of the voltage signal to produce a residual signal, which detects changes in the power system. The estimation of total harmonic distortion (THD) follows, and its fluctuations help discern between islanding and typical events. This suggested approach undergoes assessment through a test system simulated in MATLAB/Simulink across different situations. Outcome findings underscore the efficacy of the suggested approach in distinguishing betwee...
International Transactions on Electrical Energy Systems
Power management in advanced grid systems requires the seamless integration of diverse renewable ... more Power management in advanced grid systems requires the seamless integration of diverse renewable energy sources. This study investigates the optimization of a grid-connected system comprising a photovoltaic (PV) solar panel, energy storage system, fuel cell (FC), and diesel generator (DG) using the bioinspired metaheuristic technique called jellyfish optimization (JF). The objective is to maximize power generation from the PV system under normal and partial shading conditions. The performance of JF is compared against particle swarm optimization (PSO) using various parameters. As India heavily relies on solar PV, the results highlight JF’s exceptional effectiveness in extracting maximum power during partial shading scenarios. Inspired by the active and passive motions of jellyfish in the ocean, the JF algorithm is utilized. To further optimize the power output, the system is integrated with an efficient battery management system, PEM fuel cell stacking, and diesel generators. The sy...
In current scenario islanding in smart grid a big challenge that results, in various uncertaintie... more In current scenario islanding in smart grid a big challenge that results, in various uncertainties in the system parameters, also leads to degrade the power quality (PQ), and can also become threat to the maintenance workers. In this study a new passive islanding detection technique for grid-connected distributed generation (DG) units is proposed. The presented method employs an Unscented Kalman filter (UKF) to extract and filter the harmonic contents of the voltage signal measured at DG end. A three-phase voltage signal is measured at PCC (point of common coupling) and then it be taken as a test signal for analysis of islanding event detection. Here, at first a residual signal is produced using UKF to detect the changes occurring in the power system. Then, at second step, a total harmonic distortion (THD) is estimated by the UKF). The variation of THD classifies between islanding events and normal events. The IEEE 9-bus test system simulated in Matlab/Simulink is used as a test bed...
Transportation Research Record: Journal of the Transportation Research Board, 2017
The District of Columbia is enjoying rapid growth in cycling, evident through trends in census mo... more The District of Columbia is enjoying rapid growth in cycling, evident through trends in census mode share data and in the presence of more cyclists out on the street. The District Department of Transportation (DOT) has spent significant resources in the past two decades to improve active transportation planning, outreach, and infrastructure delivery. These efforts have led to the District’s recognition as a cycling-friendly city. Now the District DOT is taking stock of what has been done to improve cycling thus far and to determine what to do next. The District DOT is starting to ask what is driving the growth in the cycling mode share. How can the District understand, nurture, and expand on that growth in the cycling mode share? This study explored underlying relationships in which the District’s cycling mode share was present. The analysis dug deeply by doing (a) a statistical analysis to identify key factors that influenced cycling and (b) a spatial analysis that defined trends in accessibility to cycling facilities and the mobility of the cycling network. Findings from this research will help inform District DOT planners on what policy, operational, outreach, and capital investment levers to consider as they continue to promote cycling in the District going forward.
International Journal of Renewable Energy Research, 2017
There is an unstable situation in Yemen which causes a complete darkness and a nearly stops the b... more There is an unstable situation in Yemen which causes a complete darkness and a nearly stops the basic services due to power outages in the country because of the political and financial problems experienced by the country nowadays. Even though Yemen is one of the richest countries in the world in renewable energy sources (solar energy), with over three thousand hours per year clean blue sky. Under the financial and political crisis, Yemen suffers from problems in the availability of petroleum products which required to generate electric power using diesel generators. This paper aims to provide renewable energy as a suitable solution as well as a clean and environmental friendly energy. It also aims to reduce the uses of diesel-generator electric and presents the effective and efficient use of solar energy as alternative renewable energy for electrification of the necessary government facilities as (important ministries’ buildings, hospitals, schools and universities). Which will lea...
Active development of green energy and the continuous major problems in Yemen power sector lead t... more Active development of green energy and the continuous major problems in Yemen power sector lead to serious issues related to the load demand and civilization of the country. This issue requires particular strategies to be incorporated to maintain necessities of electrical power among green energy resources and utility grid. This paper presents an algorithm for power management in grid-connected hybrid renewable energy system under a set of constraints, including the special country situations, weather conditions, and utility grid situations. To manage the flow of power between the different loads (first, second, and third load) and the multi-agents; (utility grid and green energy resources) fuzzy smart controller is used. Proposed techniques fuzzify all the inputs and perform fuzzification of the rules from fuzzy outputs before defuzzification stage. The proposed smart control strategy is able to sense the parameter’s fluctuations in hybrid renewable energy generation, grid situatio...
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Papers by Adel Rawea