UTILITY SCALE RENEWABLE ENERGY SYSTEM CONTROLS FOR RAMP-RATE, VOLTAGE, AND FREQUENCY MANAGEMENT

摘要

An energy system includes renewable energy sources each including an inverter. The renewable source inverters are coupled to a distribution line in a manner wherein power combines additively. The system also includes an energy storage source including an energy storage inverter coupled to the distribution line between the point of interconnection and the renewable source inverters. Finally, a control system is structured to: (i) control a voltage at the point of interconnection by controlling a renewable source reactive power output by the renewable source inverters and an energy storage reactive power output by the energy storage inverter, and (ii) provide power ramp rate control for the renewable energy system by controlling at least one of a renewable source real power output by each of the renewable source inverters and a first energy storage real power output by the energy storage inverter.

主权项

1. A renewable energy system coupled to a point of interconnection of an electrical distribution system, comprising:
a number of renewable energy sources each including a renewable source inverter structured to output a renewable source power, the renewable source inverter of each of the renewable energy sources being coupled to a distribution line in a manner wherein the renewable source powers of the renewable source inverters combine additively; and an energy storage source including an energy storage device coupled to an energy storage inverter, wherein the energy storage inverter is coupled to the distribution line between the point of interconnection and the renewable source inverters; and a control system operatively coupled to the energy storage source and the number of renewable energy sources, wherein the control system is structured to: (i) control a voltage at the point of interconnection by controlling a renewable source reactive power output by each of the renewable source inverters and an energy storage reactive power output by the energy storage inverter, and (ii) provide power ramp rate control for the renewable energy system by controlling at least one of a renewable source real power output by each of the renewable source inverters and a first energy storage real power output by the energy storage inverter.