With the increased climatic change and modern grid complexity, extreme grid power outage events caused by natural calamity and human interruptions have led to an urgency to enhance the grid resiliency. Microgrids (MGs) have proved to be a... more
With the increased climatic change and modern grid complexity, extreme grid power outage events caused by natural calamity and human interruptions have led to an urgency to enhance the grid resiliency. Microgrids (MGs) have proved to be a concrete solution to these situations. However, these events are quite uncertain, leading to the unintentional island of MGs that has adverse effects. Thus, as a first step toward increasing grid resiliency with MG, informing the distributed generations about the unintentional island is a critical task. Hence, there is a need to develop a quick and reliable unintentional island detection scheme. Micro phasor measurement units (μPMUs) are becoming popular in MG. Given this, this study proposes an inadvertent island detection scheme in an MG using an intelligent μPMU. With the μPMU, the voltage at solar generator bus is measured, three features are extracted through spectral kurtosis and random forest classifier is employed for island detection. After island detection, a control methodology is proposed to circumvent the post-effects. The method has zero non-detection zone, 99.83% accuracy and a detection time of 20 ms. The reliability of the algorithm is ascertained using the analytical hierarchical approach and software fault-tree analysis.
This paper proposes three phase grid connected anti-islanding controller based on distributed generation interconnection. This method is a combination of two detection methods namely active and passive. Firstly, Active islanding detection... more
This paper proposes three phase grid connected anti-islanding controller based on distributed generation interconnection. This method is a combination of two detection methods namely active and passive. Firstly, Active islanding detection generates disturbances at the output of the distributed generation by use of Positive feedback and Continuous feedback signal injection which is based on DQ implementation. Secondly, passive islanding detection method is based on measuring the system parameters such as voltage, frequency, active and reactive power and total harmonic distortion (THD). This method use three phase RLC load and compares the performance of the technique with and without the anti islanding controller. Islanding conditions are simulated and verified with full analysis simulation and experimental result.
The Anti Islanding topics and idea with BCJ Controls. We discuss it in this PDF for you to know what is anti Islanding and what is the importance of applying it to the power system. Visit us for more details: http://bcjcontrols.com.au/.... more
The Anti Islanding topics and idea with BCJ Controls. We discuss it in this PDF for you to know what is anti Islanding and what is the importance of applying it to the power system. Visit us for more details: http://bcjcontrols.com.au/.
Distributed generation is gaining importance from the last few years with the significant rise in demand of power. Distributed Generators(DG which are interconnected in parallel makes great contribution to provide clean power and improve... more
Distributed generation is gaining importance from the last few years with the significant rise in demand of power. Distributed Generators(DG which are interconnected in parallel makes great contribution to provide clean power and improve power conditions. However, along with the advantages of grid connected system, many problems are associated with it including frequency deviation, voltage fluctuation, harmonics, etc.ne of the critical and important research topic is inherent or unintentional islanding. There is significant negative impact on DG systems due to unintended islanding. Therefore the islanding condition must be detected and the DG must be disconnected from the system to ensure safety of workers and equipment. This paper presents a survey of the islanding detection methods for grid-connected systems.
