应对特高压特殊运行工况的最后断路器保护改进策略
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摘要
特高压直流逆变站高端换流变压器因故障或检修退出运行后,现有基于能耗积分的避雷器型最后断路器保护将无法正常动作。针对这一缺陷,结合对避雷器型最后断路器保护机理的详细分析,提出了2种改进的避雷器型最后断路器保护策略。采用±800 kV云广特高压直流工程实际参数,基于PSCAD,EMTDC平台搭建了包含多回交流出线的特高压直流输电系统仿真模型。基于此,对比分析了现有避雷器型最后断路器保护以及本文所提出方法的动作性能,验证了本文方法可以在特高压特殊运行工况下正确动作。
Existing arrester-based last breaker circuit protection which bases on power integral could not operate normally when the high-end converter transformer in UHVDC is out of operation due to failure or maintenance.To address this issue,the paper proposes two kinds of improved strategies combined with a detailed analysis of the arrester-based last breaker circuit protection principle.Besides,the paper uses the parameters coming from ±800 kV Yunnan-Guangdong UHVDC system to establish UHVDC simulation model containing multi-infeed AC lines based on PSCAD/ EMTDC,and conducts the analysis to compare the action performance.The results show that the proposed method can give correct response to the UHVDC special operation mode.
Existing arrester-based last breaker circuit protection which bases on power integral could not operate normally when the high-end converter transformer in UHVDC is out of operation due to failure or maintenance.To address this issue,the paper proposes two kinds of improved strategies combined with a detailed analysis of the arrester-based last breaker circuit protection principle.Besides,the paper uses the parameters coming from ±800 kV Yunnan-Guangdong UHVDC system to establish UHVDC simulation model containing multi-infeed AC lines based on PSCAD/ EMTDC,and conducts the analysis to compare the action performance.The results show that the proposed method can give correct response to the UHVDC special operation mode.
引文
[1]EC TS 60071-5 2002,Insulation Co-ordination-Part 5:Procedures for High-voltage Direct Current(HVDC)Converter Stations[S].
[2]DL/T605—1996,高压直流换流站绝缘配合导则[S].
[3]周浩,沈扬,李敏,等.舟山多端柔性直流输电工程换流站绝缘配合[J].电网技术,2008,37(4):879-890.
[4]周浩,王东举.±1 100 kv特高压直流换流站过电压保护和绝缘配合[J].电网技术,2012,36(9):1-8.
[5]赵畹君.高压直流输电工程技术[M].北京:中国电力出版社,2004_:218-219.
[6]王华伟,蒋卫平,吴娅妮,等.云广±800 kV特高压直流工程逆变站最后断路器跳闸故障研究[J].电网技术,2008,32(18):6-9.
[7]张健康,索南加乐,杨黎明,等.交直流混联电网过电压保护应用分析[J].电力系统自动化,2011,35(12):95-100.
[8]陈水明,余占清,黄璐璐,等.互联系统电磁暂态交互作用研究,Ⅳ:直流侧对交流侧的影响[J].高电压技术,2011,37(7):1590-1597.
[9]张婷,蒲永红.高压直流输电系统两种最后断路器跳闸保护比较[J].上海工程技术大学学报,2011,25(2):151-153.
[10]刘宝宏,殷威扬,杨志栋,等.±800 kV特高压直流输电系统主回路参数研究[J].高电压技术,2007,33(1):17-21.
[11]汲广,刘茂涛,张志朝,等.t800 kV云广工程逆变站阀组最后断路器保护逻辑改进分析[J].电力系统自动化,2013,38(4):103-133.
[12]江一,夏拥.深圳换流站最后断路器及线路保护的改进建议[J].南方电网技术,2009,3(1):69-71.
[13]邓洁清,项巍.武南变最后断路器保护装置内部逻辑分析及优化[J].电力自动化设备,2008,18(7):121-123.
[14]张婷,张小亮.特高压奉贤换流站最后断路器保护调试异常原因及改进建议[J].水电能源科学,2012,30(11):156-159.
[15]许卫刚,张志宏,单哲,等.特高压直流与常规直流工程最后断路器保护浅析[J].江苏电机工程,2010,29(5):6-10.
[2]DL/T605—1996,高压直流换流站绝缘配合导则[S].
[3]周浩,沈扬,李敏,等.舟山多端柔性直流输电工程换流站绝缘配合[J].电网技术,2008,37(4):879-890.
[4]周浩,王东举.±1 100 kv特高压直流换流站过电压保护和绝缘配合[J].电网技术,2012,36(9):1-8.
[5]赵畹君.高压直流输电工程技术[M].北京:中国电力出版社,2004_:218-219.
[6]王华伟,蒋卫平,吴娅妮,等.云广±800 kV特高压直流工程逆变站最后断路器跳闸故障研究[J].电网技术,2008,32(18):6-9.
[7]张健康,索南加乐,杨黎明,等.交直流混联电网过电压保护应用分析[J].电力系统自动化,2011,35(12):95-100.
[8]陈水明,余占清,黄璐璐,等.互联系统电磁暂态交互作用研究,Ⅳ:直流侧对交流侧的影响[J].高电压技术,2011,37(7):1590-1597.
[9]张婷,蒲永红.高压直流输电系统两种最后断路器跳闸保护比较[J].上海工程技术大学学报,2011,25(2):151-153.
[10]刘宝宏,殷威扬,杨志栋,等.±800 kV特高压直流输电系统主回路参数研究[J].高电压技术,2007,33(1):17-21.
[11]汲广,刘茂涛,张志朝,等.t800 kV云广工程逆变站阀组最后断路器保护逻辑改进分析[J].电力系统自动化,2013,38(4):103-133.
[12]江一,夏拥.深圳换流站最后断路器及线路保护的改进建议[J].南方电网技术,2009,3(1):69-71.
[13]邓洁清,项巍.武南变最后断路器保护装置内部逻辑分析及优化[J].电力自动化设备,2008,18(7):121-123.
[14]张婷,张小亮.特高压奉贤换流站最后断路器保护调试异常原因及改进建议[J].水电能源科学,2012,30(11):156-159.
[15]许卫刚,张志宏,单哲,等.特高压直流与常规直流工程最后断路器保护浅析[J].江苏电机工程,2010,29(5):6-10.