Use of distributed generator (DG) inverters as statcoms for decreasing line losses

摘要

The invention provides systems, methods, and devices relating to the provision of system-wide coordinated control voltage regulation support in power transmission and distribution networks using multiple inverter based power generation facilities, which are coupled to the power transmission and distribution networks for minimizing transmission and distribution line losses. The invention uses a novel control method of inverter based Distributed Generators as Static Synchronous Compensator (STATCOM) in a way that provides a dynamic voltage regulation/control with the inverter capacity remaining after real power generation, thereby decreasing system line losses.

主权项

1. A method for reducing line losses in a power transmission and distribution network, the method comprising:
determining specific voltage setpoints for at least one inverter based power generation facility operatively coupled to said network based on an optimal load flow study performed at an energy control center, said specific voltage setpoints being voltages that minimize line losses on said network; communicating said specific voltage setpoints from said energy control center to said at least one inverter based power generation facility operatively coupled to said network via at least one bidirectional communication channel; and repeating said determining and said communicating at a set time interval determined by said energy control center to ensure that said line losses are continuously minimized, wherein an inverter of said at least one inverter based power generation facility operates as a static synchronous compensator (STATCOM), said inverter injecting or absorbing controlled reactive power with said network to regulate a voltage at a point of common coupling of said at least one inverter based power generation facility towards said specific voltage setpoint, wherein said energy control center coordinates said voltage regulation on said network; wherein said controlled reactive power provided to said network is based on an inverter capacity for said at least one inverter based power generation facility available after real power generation, and wherein a normal real power production function of the at least one inverter based power generation facility continues while said inverter injects or absorbs said controlled reactive power with said network.