• CSCD核心库收录期刊
  • 中文核心期刊
  • 中国科技核心期刊

电力建设 ›› 2015, Vol. 36 ›› Issue (3): 82-87.doi: 10.3969/j.issn.1000-7229.2015.03.014

• 发电技术 • 上一篇    下一篇

小容量发电机出口断路器及馈线断路器瞬态恢复电压仿真研究

张勇1,刘渝根2,胡振兴1,齐春1,宋兆非1   

  1. 1.中国电力工程顾问集团公司西南电力设计院,成都市 610021; 2.输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市
    400044
  • 出版日期:2015-03-01
  • 作者简介:张勇(1983),男,工学学士,工程师,主要从事发电厂电气设计工作; 刘渝根(1963),男,硕士,教授,主要从事电力系统过电压与接地技术的研究工作; 胡振兴(1980),男,工学学士,高工,主要从事发电厂电气设计工作; 齐春(1963),男,工学学士,教授级高工,主要从事发电厂电气设计工作; 宋兆非(1988),男,工学学士,助理工程师,主要从事发电厂电气设计工作。
  • 基金资助:

    国家创新研究群体基金(51021005)。

Simulation Research on Transient Recovery Voltage of Outlet Circuit Breaker in Small Capacity Generator and Feeder Circuit Breaker

ZHANG Yong1, LIU Yugen2, HU Zhenxing1, QI Chun1, SONG Zhaofei1   

  1. 1. China Power Engineering Consulting (Group) Corporation Southwest Electric Power Design Institute, Chengdu 610021,
    China; 2. State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University,
    Chongqing 400044, China
  • Online:2015-03-01

摘要:

国内外学者论证了大容量发电机出口装设发电机断路器(generator circuit breaker,GCB)的必要性,而对小容量(≤30   MW)发电机出口及发电厂内馈线是否也应装设GCB并没有进行深入研究。利用电磁暂态仿真软件PSCAD/EMTDC计算分析了在开断条件最恶劣的三相短路故障情况下,12~30   MW小容量发电机出口断路器及馈线断路器的瞬态恢复电压(transient recovery voltage,TRV),并从TRV上升率的角度出发,确定普通配电型断路器是否可以替代GCB安装在发电机出口及厂用电馈线处。计算结果表明,当发电机出线端及厂用电馈线中分别发生三相短路故障时,断路器TRV上升率均未超过0.34   kV/μs,普通配电型断路器可以替代GCB安装在小容量发电机出口及厂用电馈线处。

关键词: 小容量发电机, 馈线, 普通配电型断路器, 发电机断路器, 三相短路故障, 瞬态恢复电压

Abstract:

Scholars have demonstrated the necessity of installing generator circuit breaker (GCB) in large capacity generator terminal, but they did not make in depth study on whether GCB should be installed in small capacity generator (≤30   MW) terminal or feeder line. So in this paper, transient recovery voltage (TRV) of circuit breaker in small capacity generator(12-30  MW)terminal and feeder line was researched with using electromagnetic transient program PSCAD/EMTDC, under three-phase short circuit fault in the worst breaking condition. Then, this paper determined whether distribution circuit breaker could replace GCB to be installed at generator terminal or feeder line. The calculation results show that when three-phase short circuit fault occurs in generator terminal or feeder line, respectively, the TRV rising rate of circuit breaker is no more than 0.34   kV / μs, thus distribution circuit breaker can replace GCB to be installed at generator terminal and feeder line.

Key words: small capacity generator, feeder, distribution circuit breaker, generator circuit breaker, three-phase short circuit fault, transient recovery voltage