摘要详情

ID / 提交时间

89 / 2024-04-11 15:37:21

标题

Simulation Analysis of AC Filter Circuit Breaker Switching

关键字

DC transmission; filter; inrush current; circuit breaker; MATLAB

主题及专题

1)Emerging HV Switching Technologies

状态

全文录用

作者

Huaping Shan / HVDC TECHNICAl CENTER OF SGCC

Yufei Tao / Xi’an Jiaotong University

Pengxiang Zhou / HVDC TECHNICAl CENTER OF SGCC

Wenfeng Liao / HVDC TECHNICAl CENTER OF SGCC

Xiaofei Yao / xi'an jiaotong university

Zhiyuan Liu / Xi’an Jiaotong University；State Key Laboratory of Electric Power Equipment

摘要

An AC filter serves dual purpose of filtering harmonics and compensating reactive power for the power systems, which makes it a crucial component within a converter station of a high-voltage DC (HVDC) system. Frequent switching of the AC filters, during the operation of the DC system, results in high amplitude inrush current and overvoltages, both of which pose risks to the reliable operation of the circuit breakers (CBs). The objective of this paper is to conduct an electromagnetic transient simulation analysis on a relationship between switching inrush current and switching phase of AC filter CB. Thereby it would provide an insight for the CB's state evaluation and for controlled switching strategy. In this paper, the switching overcurrent and overvoltage of AC filter is given at first. Secondly, the transient simulation of HP3 AC filter switching based on MATLAB and a comparative analysis with field operation is made. Simulation results reveal that HP3 filter of Yinmin converter substation is not a capacitive load and it is an inductive load. When it is switched from voltage phase-angle 0° to 90°, the inrush current of its circuit breaker #5612 decreases with the increase of phase angle. During the voltage phase-angle from 90° to 180°, the #5612 circuit breaker inrush current increases with the increase of phase-angle.