基于变斜率动态电流偏差控制的后续换相失败抑制方法  

Method of subsequent commutation failure suppression based on variable slope dynamic current deviation control

作　　者：高贵亮 辛超山 余中平 胡志云 尹纯亚 GAO Guiliang;XIN Chaoshan;YU Zhongping;HU Zhiyun;YIN Chunya(Economic Research Institute,State Grid Xinjiang Electric Power Co.,Ltd.,Urumqi 830000,China;Xinjiang University,Urumqi 830046,China)

机构地区：[1]国网新疆电力有限公司经济技术研究院,新疆乌鲁木齐830000 [2]新疆大学,新疆乌鲁木齐830046

出　　处：《现代电子技术》2023年第9期148-154,共7页Modern Electronics Technique

基　　金：国网新疆电力有限公司科技项目(SGXJJYOOXXDLXTGHYJZXJS2200023)。

摘　　要：针对高压直流系统首次换相失败后在故障恢复期间的后续换相失败问题,提出一种变斜率动态电流偏差控制方法。该方法基于瞬时电压实时检测换流母线电压幅值,根据换流母线电压跌落量自适应提高曲线斜率和关断角最大增量,增大故障恢复过程中的实际关断角裕度,有效降低后续换相失败的发生概率。最后,在PSCAD/EMTDC中搭建CIGRE标准模型对所提策略进行仿真测试,不同交流故障类型下的测试结果验证了所提变斜率动态电流偏差控制方法的有效性。In allusion to the problem of subsequent commutation failure during the fault recovery period after the first com⁃mutation failure of HVDC system,a method of variable slope dynamic current deviation control is proposed.The method can be used to detect the voltage amplitude of the commutation bus in real time based on the instantaneous voltage,adaptively increase the slope of the curve and the maximum increment of the turn⁃off angle according to the voltage sag of the commutation bus,increase the actual turn⁃off angle margin in the process of fault recovery,and effectively reduce the probability of subsequent commutation failure.CIGRE standard model is built in PSCAD/EMTDC to simulate and test the proposed strategy.The testing re⁃sults under different AC fault types verify the effectiveness of the proposed variable slope dynamic current deviation control strategy.

关 键 词：高压直流系统 后续换相失败 电流偏差控制 抑制策略 关断角 变斜率 换相失败 自适应 

分 类 号：TN876.3[电子电信—信息与通信工程]