Improving voltage and frequency control of DERs through Dynamic Power Compensation
Rodrigo Bernal, Federico Milano
Abstract
This work proposes a Dynamic Power Compensation (DPC) for the frequency and voltage controllers of converter-based Distributed Energy Resources (DERs) to improve the dynamic response of low-inertia power systems. The proposed approach adjusts both active and reactive powers of DERs to compensate the dynamic coupling between voltage and frequency controllers. This result is obtained by including additional signals to the standard controllers. These signals are defined based on the sensitivities of active and reactive powers with respect to bus voltage magnitudes and angles. Simulation results show an overall performance improvement in the power system when the proposed DPC is considered. Modified versions of the WSCC 9-bus and IEEE 39-bus benchmark systems are used to comprehensively assess the proposed DPC.