电流型有源消弧法性能分析与改进  

Performance Analysis and Improvement of Current Active Arc-suppression Method

作　　者：赵国军 陈坤燚 李沁 曾伟 柯贤旺 ZHAO Guojun;CHEN Kunyi;LI Qin;ZENG Wei;KE Xianwang(School of College of Intelligent Systems Science and Engineering,Hubei Minzu University,Enshi 445000,China)

机构地区：[1]湖北民族大学智能科学与工程学院,恩施445000

出　　处：《电力系统及其自动化学报》2023年第1期136-142,共7页Proceedings of the CSU-EPSA

基　　金：湖北省教育厅科学技术研究计划指导项目(B2019092)。

摘　　要：为解决传统电流型有源消弧法受对地参数测量误差影响较大、消弧困难的问题,提出一种改进型电流有源消弧法。该方法在故障后首先从中性点注入幅值为90%的配网总电容电流,以保证注入电流的负误差;再通过调整注入电流的相位,引起故障残流的变化,从而计算出准确的注入电流;随后改变注入电流的幅值和相位,将故障点电流抑制到零附近。最后通过PSCAD/EMTDC仿真实验表明,对于任意单相接地故障,均能实现可靠消弧,而且配电网线路结构变化不会对该方法的消弧性能带来影响。To solve the problem that the traditional current active arc-suppression method is greatly affected by the measurement error of ground parameters and difficult to eliminate arc,an improved current active arc-suppression method is proposed in this paper. First,the total capacitance current of the distribution network with an amplitude of 90% is injected at the neutral point after the fault,thus ensuring the negative error of the injection current. Then,the fault residual current is changed by adjusting the phase of the injection current,so as to calculate the accurate injection current. Afterwards,the amplitude and phase of the injection current are changed to suppress the fault-point current to near zero.Finally,simulation results based on PSCAD/EMTDC show that a reliable arc-suppression can always be achieved under any single-phase grounding fault,and the change in the line structure of distribution network will not affect the arc-suppression performance of the proposed method.

关 键 词：配电网 单相接地故障 电流消弧法 对地电容测量误差 有源消弧法 

分 类 号：TM77[电气工程—电力系统及自动化]