Dynamic Voltage Stability of Distribution Systems in case of High Penetration of Photovoltaic Plants

What is it about?

In this paper, a methodology is proposed to control the reactive power generation of PV-inverters. The objective is to mitigate the voltage fluctuations at the point of common coupling (PCC) resulting from increasing or decreasing the active power output of PV plants which is dependent on solar radiation level.

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Why is it important?

Levels of control that are built-in PV-inverters are tested in the case of normal operation and during disturbances. Comparison results show that the most suitable control methodology in case of disturbances and after fault clearance is the local voltage control. While the plant voltage control with coordinated V/Q control is the most preferable control methodology during normal operation.