With the increasing proportion of photovoltaic power generation connected to the distribution network,voltage out of limits and fluctuations have become increasingly serious. A voltage coordination control strategy for distribution network zoning is proposed to address this issue. In terms of distribution network zoning,based on the voltage sensitivity index information obtained from day-time power flow calculation,the voltage change index suitable for distribution network zoning is constructed by calculating the changes in the voltage of each node affected by photovoltaic active and reactive power regulation. The regional division of each node is determined based on the criterion that this index meets the voltage change threshold requirements;In terms of voltage coordination control of the zone,a voltage sensitivity control strategy within the zone is adopted to pair nodes and utilize the photovoltaic active and reactive power regulation ability to control all out of limit voltages within the zone to the normal range. Based on this,an interval distributed voltage coordination control strategy is adopted to achieve interval state variable equivalence and optimize the dynamic reactive power compensation of photovoltaic systems between adjacent zones based on the alternating direction method of multipliers ( ADMM) algorithm,in order to achieve optimal suppression of expected voltage fluctuations across the entire network. Taking the IEEE 33 node system as an example,numerical analysis is conducted to verify the effectiveness of the proposed strategy.
关键词
配电网/高比例光伏/分区控制/电压协调控制
Key words
distribution network/high proportion of photovoltaic/zoning control/voltage coordination control
维普
万方数据