摘要
换相失败作为常规高压直流输电系统最为常见的故障之一,对受端交流系统的安全稳定会产生严重的影响,现有的换相失败预测与识别的方法大多只考虑单一变量的影响,难以反映换相失败发生时的复杂暂态过程。通过分析引起换相失败的主要因素,定义换相失败风险因子来预测发生换相失败的风险。又通过仿真分析提取换相失败后直流受端交流侧输出电流相位变化的典型特征,对换相失败进行快速识别。通过将两种方法相结合,提出了一种预测与识别换相失败的新方法。通过RTDS搭建华东电网某地区多回直流接入模型进行仿真验证,结果验证了所提方法的有效性。
Commutation failure is one of the most common faults in conventional HVDC transmission systems,seriously impacting safety and stability of the AC system at receiving end.Most of existing methods of commutation failure prediction and identification only consider the influence of a single variable,and are difficult to reflect complex transient process when commutation failure occurs.This paper defines a commutation failure risk factor by analyzing the main factors causing commutation failure to predict the risk of commutation failure,and,through simulation analysis,extracts the typical characteristics of the phase change of the output current of DC inverter station to quickly identify commutation failure.Combining above two methods,a new method for predicting and identifying commutation failures is designed.A multi-circuit DC access model of East China power grid was built with RTDS for simulation verification.The simulation results verify effectiveness of the proposed method.
作者
蔡文瑞
杨国生
杜丁香
王兴国
CAI Wenrui;YANG Guosheng;DU Dingxiang;WANG Xingguo(State Key Laboratory of Alternate Electrical Power System With Renewable Energy Source(North China Electric Power University),Changping District,Beijing102206,China;State Key Laboratory of Power Grid Safety and Energy Conservation(China Electric Power Research Institute),Haidian District,Beijing100192,China)
出处
《电网技术》
EI
CSCD
北大核心
2019年第10期3477-3487,共11页
Power System Technology
基金
国家重点研发计划智能电网技术与设备重点专项(2016YFB0900600)
国家电网公司科技项目(52094017000W)~~
