主变空充引起直流系统连续换向失败原因分析及解决措施  

Analysis and Solution of the Continuous Commutation Failure in HVDC Caused by Main Transformer Charging

作　　者：康建爽 曹森 郝俊芳 张爱玲 孙巍峰 张克辉 

机构地区：[1]许继电气股份有限公司,河南省许昌市461000

出　　处：《智能电网》2015年第5期415-422,共8页Smart Grid

摘　　要：以某特高压变电站主变空充引起临近换流站发生连续换向失败为分析背景,建立数字仿真模型,分析研究主变空充与换流站连续换向失败之间内在关联关系。根据分析结果,对控制保护系统对应控制逻辑功能进行软件优化,并进行实验室仿真证实该修改有效抑制上述过程换向失败发生。最后,将上述改进措施应用该换流站并现场试验测试。现场实践证明:改进措施有效避免特高压主变空充过程中引起换流站连续换向失败。Taking the continuous commutation failure in a converter station caused by a UHV substation main transformer charging as the analysis background, the digital simulation model is built, and the internal relationship between the main transformer charging and the continuous commutation failure is analyzed. According to the analysis results, software optimization for the control logic function of the control and protection system is made, and laboratory simulation is conducted to verify that the optimization can effectively inhibit continuous commutation failure during the above process. At last, the improvement measures are applied to the converter station and field experimental test is made. Field practice confirms that the improvement measures can effectively avoid continuous commutation failure in converter station during the process of the UHV main transformer charging.

关 键 词：高压直流输电 换流阀 连续换向失败 重叠角 熄弧角 

分 类 号：TM721.1[电气工程—电力系统及自动化]