基于换相角预测计算的高压直流输电双桥共同换相预判方法  

Predictive Method for Double Bridge Simultaneous Commutation inHVDC Transmission Based on Commutation Angle Prediction Calculation

作　　者：谭展鹏 郭亚勋 李晓华[1] 李昊 王玉麟 Tan Zhanpeng;Guo Yaxun;Li Xiaohua;Li Hao;Wang Yulin(School of Electric Power,South China University of Technology,Guangzhou Guangdong 510641,China;Energy Development Research Institute of China Southern Power Grid,Guangzhou Guangdong 510700,China)

机构地区：[1]华南理工大学电力学院,广东广州510641 [2]南方电网能源发展研究院有限责任公司,广东广州510700

出　　处：《电气自动化》2024年第3期31-33,共3页Electrical Automation

基　　金：国家自然科学基金项目(51677073);国家电网智能电网联合基金项目(U1766213)。

摘　　要：高压直流输电系统交流故障下出现双桥共同换相会增大换相失败的风险,提前判断双桥共同换相的发生有利于及时采取措施避免换相失败。为获取对双桥共同换相进行预判所需的高精度换相角预测计算结果,利用拉格朗日中值定理建立换相角与中值时刻的关系,并构造虚拟换相过程用于确定中值时刻。仿真结果表明,所提换相角预测计算方法具有良好的鲁棒性和精度,用于双桥共同换相预判中能有效预判双桥共同换相的发生。If dual bridge simultaneous commutation(DBSC)occurs under AC faults in high-voltage direct current transmission systems,the risks of commutation failure will increase.Predicting the occurrence of DBSC in advance is beneficial for taking timely measures to avoid commutation failure.In order to obtain the high-precision prediction calculation results of the commutation angle required for predicting DBSC,the Lagrange mean value theorem was used to establish the relationship between the commutation angle and the median time,and a virtual commutation process was constructed to determine the median time.The simulation results show that the proposed commutation angle prediction calculation method has good robustness and accuracy,and can effectively predict the occurrence of DBSC when used in DBSC prediction.

关 键 词：高压直流输电 换相失败 双桥共同换相 换相角预测计算 拉格朗日中值定理 

分 类 号：TM721[电气工程—电力系统及自动化]