高压直流换流变压器有载分接开关控制优化  

Optimization on Control Strategy of Tap Changer in HVDC Converter Transformer

作　　者：郭贤珊 李凤祁 阮思烨 张俊 刘心旸 GUO Xianshan;LI Fengqi;RUAN Siye;ZHANG Jun;LIU Xinyang(State Grid Corporation of China,Beijing 100031,China;DC Technology Center of State Grid Corporation of China,Beijing 100052,China)

机构地区：[1]国家电网有限公司,北京市100031 [2]国家电网有限公司直流技术中心,北京市100052

出　　处：《电力建设》2021年第2期9-19,共11页Electric Power Construction

基　　金：国家电网公司科技项目(SGCC[2020]49355A)。

摘　　要：换流变压器有载分接开关是高压直流输电系统实现电压、功率调节功能的重要设备。针对近年来换流变压器有载分接开关在档位调节过程中相继发生爆炸起火等严重故障,有必要研究避免有载分接开关不必要动作的措施,降低分接开关故障风险。梳理并分析了不同类型直流换流站的有载分接开关控制策略,揭示了部分在运换流站档位频繁调节的原因;在此基础上,从运行方式、控制参数及控制策略三方面开展研究,提出三类降低动作次数的措施,并基于实时数字仿真平台搭建仿真模型,对各类措施在降低有载分接开关动作次数方面的效果进行了仿真比较。最后,通过工程调试及运行情况进一步验证了这些措施的可行性,并对各类措施的优缺点及适用条件进行了讨论。The on-load tap changer is important equipment to realize voltage and power regulation in HVDC system. In recent years, several serious faults arose during on-load tap changer adjustment process. To reduce the risk of tap changer failure, it is necessary to study the measures to avoid unnecessary adjustment of the tap changer. The control strategies of on-load tap changer of different types of HVDC converter stations are analyzed in this paper, and the reasons for the unnecessary continual adjustment of tap changer in some stations are revealed. On that basis, research on the optimizing of the operation mode, control parameters and control strategy is carried out, and three kinds of measures to reduce the adjustment times of the on-load tap changers are presented. Simulation models are set up to compare the effect of these measures. Finally, the feasibility of these measures is further verified by both simulation and site operation experience, the relative merits and application conditions for the suggested measures are also discussed.

关 键 词：高压直流输电系统 有载分接开关 频繁调节 控制策略 实时数字仿真(RTDS) 

分 类 号：TM403.3[电气工程—电器]