摘要
高压直流断路器是高压直流电网控制保护的关键设备之一。为解决混合式直流断路器串联多断口机械开关的均压设计问题,该文搭建试验回路,开展双断口串联机械开关稳态、暂态电压分配特性试验,通过静电场仿真提取其分布电容参数,建立电磁暂态仿真模型,场–路结合分析均压组件参数对断口电压分配特性的影响规律。仿真与试验结果相对误差不大于3.0%。以典型±535kV混合式直流断路器为例,考虑断路器整机结构,进一步研究均压组件参数对断口电压分配特性的影响规律,得到在均压系数≥95%的条件下,六断口串联机械开关均压组件参数的建议选取范围为:100MΩ≤均压电阻≤1000MΩ,均压电容≥4.83nF,100Ω≤限流电阻≤500Ω。结果表明场–路结合分析方法进行多断口串联机械开关均压设计的有效性,可为混合式直流断路器多断口串联机械开关均压设计提供参考。
Hybrid HVDC circuit breaker is one of the key control and protection equipment of HVDC power grid. In order to solve the problem of voltage sharing component design of series multi break mechanical switch for the hybrid DC circuit breaker, a test circuit was built to carry out the static and transient voltage distribution characteristics test of series double break mechanical switch. Based on the electrostatic field simulation, the distributed capacitance parameters were obtained, and the electromagnetic transient simulation model was established. The error between the simulation and the test results was within ±3%. Taking a typical ±535kV hybrid DC circuit breaker model as an example, considering the whole structure of the circuit breaker, the influence of the parameters of the voltage sharing component on the voltage distribution characteristics of the break was studied. It was suggested that the parameters of the six-break series mechanical switch voltage sharing component should be 100MΩ≤ voltage sharing resistance ≤1000MΩ, voltage sharing capacitance ≥4.83nF, and 100Ω≤ current limiting resistance ≤500Ω under the condition of voltage sharing coefficient ≥95%.The results of this paper prove the effectiveness of the field and circuit combination analysis method for the voltage sharing design of multi-break series mechanical switches, which can provide reference for the design of multi-break series mechanical switches of hybrid DC circuit breakers.
作者
黄道春
王华清
全万霖
陈鑫
双明镜
李慧鹏
HUANG Daochun;WANG Huaqing;QUAN Wanlin;CHEN Xin;SHUANG Mingjing;LI Huipeng(School of Electrical Engineering and Automation,Wuhan University,Wuhan 430072,Hubei Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2022年第6期2407-2415,共9页
Proceedings of the CSEE
基金
国家重点研发计划项目(2017YFB0902400)。
关键词
混合式直流断路器
多断口串联机械开关
均压组件
均压设计
电压分配特性
hybrid DC circuit breaker
series multi break mechanical switch
voltage sharing components
voltage sharing design
voltage distribution characteristics
