期刊论文

Injecting Current Control Method for Active Overvoltage Suppression in Distribution Network

中文

电力系统及其自动化学报

1003-8930

2018

30

5

1-6

10.3969/j.issn.1003-8930.2018.05.001

5142500269:国家自然科学基金 61233008:国家自然科学基金 51407014:国家自然科学基金 51277014:国家自然科学基金 K-GD2014-0549:广东电网公司科技资助项目

本校为第一机构

为了对配电网三相参数不平衡导致的三相不平衡过电压进行抑制,提出一种基于比例谐振控制的配电网三相不平衡过电压有源抑制方法。通过有源逆变器向配电网中性点注入特定幅值与相位的电流,调控零序电压,从而实现三相不平衡过电压的抑制。然后设计了比例谐振闭环控制方法,先确定控制器的比例系数再确定积分系数,提高了注入电流的可控性,实现了无静差调控。仿真及实验结果表明,该方法控制精度高、稳态误差低,能达到快速、精确地抑制三相不平衡过电压的目的。

To suppress the three-phase unbalanced overvoltage caused by unbalanced three-phase parameters in distri？bution network,an unbalanced overvoltage suppression method is proposed. By injecting a current of specific amplitude and phase to the neutral point of distribution network through an active inverter,the zero-sequence voltage is controlled to realize the suppression of three-phase unbalanced overvoltage. Afterwards,a proportional resonant（PR）closed-loop control method is designed：by setting appropriate proportional and integral coefficie...