The DER applications run in fully automatous mode. During anticipated or real-time violations that DER applications cannot resolve, the system performs a synchronized feeder reconfiguration. If feeder reconfiguration cannot solve the violations, will curtail the unit injection to the maximum output allowed at the point of common coupling.
During switching where each side of a switch is fed by different buses, voltage is monitored across the open switch and will utilize the VVO function to adjust the voltage within allowable limits prior to operation. the allowable range needed to safely perform a close may be exceeded.
Volt-Var Optimization (VVO) for distributed energy resources runs in real-time in automatic mode on the platform. The base VVO function manages typical feeder violations by issuing controls in real-time to optimize the voltage profile and to reduce losses (improve the power factor) for each feeder under its control. The user can establish the control objective for each feeder, such as voltage minimization, var loss minimization, or both. The primary real-time operational objective of VVO is to avoid feeder violations which may threaten the reliability of the feeder’s continued operation.
VVO adds support for control of PV inverters, as well as distributed generation and battery storage. VVO serves to alleviate voltage issues at the point of common coupling and in reverse flow direction that result from increased DER penetration on the system. The secondary objective of VVO is to avoid curtailment as much as possible so that the renewable inverter can inject the maximum possible generation.