DAMPING OF INTER-AREA OSCILLATIONS THROUGH COORDINATED CONTROL OF UTILIY SCALE WIND AND SOLAR-BATTERY GENERATION.

There are increasingly routine situations where inverter-based generation from wind and solar power resources provides more than 50% of generation capacity during light load conditions in various regions of North America. This leads to concerns for meeting NERC power system reliability and frequency stability requirements. In particular, there have been cases of forced oscillations in recent years that may be made more severe with the presence of inverter-based generation. This paper presents a method for damping inter-area oscillations using the dc power flow capability of utility-scale solar-PV generation. The method incorporates local synchrophasor measurements in conjunction with wide-area SCADA messages to inject controlled power flows to increase system damping. Simulation results for a three-area interconnected power system corresponding to a disturbance event that occurred on June 17, 2016 in the US Eastern Interconnection indicates the proposed method could achieve improving frequency stability and a reduction in the effects of forced oscillations. [ABSTRACT FROM AUTHOR]