摘要
随着风能、太阳能等可再生清洁能源的大规模应用以及柔性直流输电技术的进步,多端柔性直流电网得到迅速发展。作为保障柔性直流电网安全可靠运行的关键设备,直流断路器也受到了越来越多的关注。直流断路器能够快速切断故障电流,但同时也会产生操作过电压,这可能会危害系统的正常运行,因此文中对多端柔性直流电网中直流断路器的操作过电压进行分析。首先对几种直流断路器产生操作过电压的原理进行简要分析,之后以基于强迫过零的机械式直流断路器为例对各种情况下断路器操作过电压对于系统的影响进行详细分析,最后对分析结果进行了总结。
With the large-scale application of such renewable clean energy as wind and solar power as well as the development of flexible DC transmission technology,multi-terminal flexible DC network has been developed rapidly.DC circuit breaker,as the key equipment to ensure safe and reliable operation of the flexible DC network,also receives more and more attention. The DC circuit breaker can cut off fault current quickly and can,at the same time,also produce switching over-voltage which may compromise normal operation of the network. Therefore,the switching over-voltage of DC circuit breaker in multi-terminal flexible DC network is analyzed in this paper. First,the principle of switching over-voltage generated by several kinds of DC circuit breakers is simply analyzed.Then,the mechanical DC circuit breaker based on forced current zero is taken as an example to analyze in detail the influence of switching over-voltage of circuit breaker on the system at various conditions. Finally,the analysis results are summarized.
作者
谭喆
高翔
陈锐
李佳尧
刘禹涵
史宗谦
TAN Zhe;GAO Xiang;CHENG Rui;LI Jiayao;LIU Yuhan;SHI Zongqian(Zhuhai Power Supply Bureau,Guangdong Power Grid Corporation,Guangdong Zhuhai 519000,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;Guangdong Diankeyuan Energy Technology Co.,Ltd.,Guangzhou 510080,China)
出处
《高压电器》
CAS
CSCD
北大核心
2023年第2期31-36,共6页
High Voltage Apparatus
关键词
多端柔性直流电网
直流断路器
操作过电压
multi-terminal flexible DC network
DC circuit breakers
switching over-voltage
