A Commutation Failure Prediction and Mitigation Method
A Commutation Failure Prediction and Mitigation Method
复制标题
换相故障预测和缓解方法
DOI：
10.35833/mpce.2020.000771
复制
发表时间：
2021-06
影响因子：
6.3
通讯作者：
Hanhang Yin
中科院分区：
文献类型：
--
作者：
Renlong Zhu;Xiaoping Zhou;Haitao Xia;Lerong Hong;Hanhang Yin
换相失败的缓解取决于换相失败预测的准确性。针对现有故障暂态期消光角计算误差较大的问题，提出了一种消光角预测与消除的方法。该方法同时考虑了直流电流和重叠角(OA)的变化，以快速预测EA。此外，该方法还考虑了临界电流值的变化以及开关角对直流电流和开关角的影响，从而获得了准确的开关角阶数。该方法可以在抑制逆变器电流的同时，降低故障时逆变器侧的无功消耗。基于PSCAD/EMTDC的仿真结果表明，该方法预测速度快，抑制能力强。
The mitigation of commutation failure (CF) depends on the accuracy of CF prediction. In terms of the large error of existing extinction angle (EA) calculation during the fault transient period, a method for CF prediction and mitigation is proposed. Variations in both DC current and overlap angle (OA) are considered in the proposed method to predict the EA rapidly. In addition, variation in critical EA and the effect of firing angle (FA) on both DC current and OA are considered in the proposed method to obtain the accurate FA order for the control system. The proposed method can achieve good performance in terms of CF mitigation and reduce reactive consumption at the inverter side when a fault occurs. Simulation results based on the PSCAD/EMTDC show that the proposed method predicts CF rapidly and exhibits good performance in terms of CF mitigation.