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An Efficient Method for Locating Distributed Generation to Provide Reactive Support in Microgrid

A.Sheela, Dr.S.Vijayachitra, V.Dhivya

The increase in power demand and limited sources for electric power has resulted in the existence of microgrid. Microgrid is a complex interconnected system which comprises of reactive power compensators nearer to the load and are used to operate the power system closer to the limits of stability. Reactive power support groups reduce voltage instability which is mainly associated with reactive power imbalance. Bus loadability also depends on the reactive power support that the bus can receive from the system. The serious type of voltage instability is voltage collapse which will lead to the complete blackout. Voltage collapse can be effectively prevented by reducing or by adding reactive power support prior to the point of voltage collapse. Locations of the reactive power compensators is the challenging task since in a multi bus system voltage collapse may occur in any bus. This paper focuses on the determination of the effective locations of reactive power compensators in the distribution system and also to analyze how the compensators connected at those buses are controlled. Hybrid approach is used for grouping the buses across which reactive support has to be provided. Voltage fluctuations get eliminated in the distribution grid through end user reactive power capable devices. The ability to provide real and reactive power support can be achieved at the end-user level itself.