基于限流级差配合的城市配电网高选择性继电保护方案
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摘要
为了解决供电半径短的城市配电网继电保护配合困难问题,提出了一种基于限流级差配合高选择性继电保护方案。在变电站出线断路器和联络开关配置限流保护装置,发生相间短路故障时,出线断路器限流保护装置迅速限流并与配置于馈线分段开关的保护装置实现多级级差继电保护配合;若为永久性故障,联络开关配置限流保护装置可以在限流条件下实现故障区域的隔离和健全区域恢复供电。结合实例详细论述了限流保护装置的组成和工作原理,着重论述了参数整定方法。分析结果表明:所建议的方法能够有效降低故障处理期间的短路电流水平和对设备的损害,不仅适用于架空配电网,而且也适用于电缆配电网。
In order to solve the problem of difficulty in relay protection of urban distribution network with short power supply radius, a scheme based on current limiting difference and high selectivity relay protection is proposed. The substation outlet circuit breaker and the loop switches are equipped with current limiting protection devices. When a phase-to-phase short-circuit fault occurs, the current limiting protection device of outlet circuit breaker quickly limits the current and cooperates with the protection device in the feeder segmentation switch to achieve multi-level differential relay protection. In the case of a permanent fault, the loop switch configures the current limiting protection device to achieve the isolation of the fault area and restoration of power in the sound area under current limiting conditions. The composition and working principles of the current limiting protection device are discussed in detail using examples and the parameter setting method is emphasized. The analysis results show that the proposed method can effectively reduce the short-circuit current level and the damage to the equipment during fault handling and is applicable not only to overhead distribution networks but also to cable distribution networks.
In order to solve the problem of difficulty in relay protection of urban distribution network with short power supply radius, a scheme based on current limiting difference and high selectivity relay protection is proposed. The substation outlet circuit breaker and the loop switches are equipped with current limiting protection devices. When a phase-to-phase short-circuit fault occurs, the current limiting protection device of outlet circuit breaker quickly limits the current and cooperates with the protection device in the feeder segmentation switch to achieve multi-level differential relay protection. In the case of a permanent fault, the loop switch configures the current limiting protection device to achieve the isolation of the fault area and restoration of power in the sound area under current limiting conditions. The composition and working principles of the current limiting protection device are discussed in detail using examples and the parameter setting method is emphasized. The analysis results show that the proposed method can effectively reduce the short-circuit current level and the damage to the equipment during fault handling and is applicable not only to overhead distribution networks but also to cable distribution networks.
引文
[1] 徐丙垠,李天友,薛永端.智能配电网建设中的继电保护问题[J].供用电,2012,29(5):16-26.XU Bingyin, LI Tianyou, XUE Yongduan. Protection issues in building smart distribution networks[J]. Distribution & Utilization, 2012, 29(5): 16-26.
[2] 刘健,刘超,张小庆,等.配电网多级继电保护配合的关键技术研究[J].电力系统保护与控制,2015,43(9):35-41.LIU Jian, LIU Chao, ZHANG Xiaoqing, et al. Coordination of relay protection for power distribution systems[J]. Power System Protection and Control, 2015, 43(9): 35-41.
[3] 刘健,张小庆,张志华.继电保护配合提高配电自动化故障处理性能[J].电力系统保护与控制,2015,43(22):10-16.LIU Jian, ZHANG Xiaoqing, ZHANG Zhihua. Improving the performance of fault location and restoration based on relay protection for distribution grids[J]. Power System Protection and Control, 2015, 43(22): 10-16.
[4] 刘健,贠保记,崔琪,等.一种快速自愈的分布智能馈线自动化系统[J].电力系统自动化,2010,34(10):82-86.LIU Jian, YUN Baoji, CUI Qi, et al. A distributed intelligent based feeder automation system with fast self-healing performance[J]. Automation of Electric Power Systems, 2010, 34(10): 82-86.
[5] 徐光福,张春合,严伟,等.基于EPON通信的智能配电网馈线差动保护[J].电力系统自动化,2014,38(2):91-96.XU Guangfu, ZHANG Chunhe, YAN Wei, et al. Feeder differential protection based on EPON communication for smart distribution networks[J]. Automation of Electric Power Systems, 2014, 38(2): 91-96.
[6] 刘健,程红丽,董海鹏,等.配电网故障判断与负荷均衡化[J].电力系统自动化,2002,26(22):34-38.LIU Jian, CHENG Hongli, DONG Haipeng, et al. Fault section identification and load balancing of distribution network[J]. Automation of Electric Power Systems, 2002, 26(22): 34-38.
[7] 费军,单渊达.配网中自动故障定位系统的研究[J].中国电机工程学报,2000,20(9):33-35.FEI Jun, SHAN Yuanda. Study of automatic fault location system in the distribution network[J]. Proceedings of the CSEE, 2000, 20(9): 33-35.
[8] 刘健,董新洲,陈星莺,等.配电网容错故障处理关键技术研究[J].电网技术,2012,35(1):253-257.LIU Jian, DONG Xinzhou, CHEN Xingying, et al. Robust fault isolation and restoration for distribution systems[J]. Power System Technology, 2012, 35(1): 253-257.
[9] 沈兵兵,吴琳,王鹏.配电自动化试点工程技术特点及应用成效分析[J].电力系统自动化,2012,36(18):27-32.SHEN Bingbing, WU Lin, WANG Peng. Technological characteristics and application effects analysis of distribution automation pilot projects[J]. Automation of Electric Power Systems, 2012, 36(18): 27-32.
[10] 刘健,张小庆,陈星莺,等.集中智能与分布智能协调配合的配电网故障处理模式[J].电网技术,2013,37(9):2608-2614.LIU Jian, ZHANG Xiaoqing, CHEN Xingying, et al. Fault location and service restoration for distribution networks based on coordination of centralized intelligence and distributed intelligence[J]. Power System Technology, 2013, 37(9): 2608-2614.
[11] 刘健,张志华,张小庆,等.继电保护与配电自动化配合的配电网故障处理[J].电力系统保护与控制,2011,39(16):53-57.LIU Jian, ZHANG Zhihua, ZHANG Xiaoqing, et al. Relay protection and distribution automation based fault allocation and restoration for distribution systems[J]. Power System Protection and Control, 2011, 39(16): 53-57.
[12] 徐丙垠,李天友,薛永端.配电网继电保护与自动化[M].北京:中国电力出版社,2017.XU Bingyin, LI Tianyou, XUE Yongduan. Relay protection and automation of electric power distribution grids[M]. Beijing: China Electric Power Press, 2017.
[13] 刘健,同向前,张小庆,等.配电网继电保护与故障处理[M].北京:中国电力出版社,2013.LIU Jian, TONG Xiangqian, ZHANG Xiaoqing, et al. Relay protection and fault processing for electric power distribution grids[M]. Beijing: China Electric Power Press, 2013.
[14] 刘健,张伟,程红丽.重合器和电压-时间型分段器配合的馈线自动化系统的参数整定[J].电网技术,2006,30(16):45-49.LIU Jian, ZHANG Wei, CHENG Hongli. The parameter setting of feeder automation system based on mutual coordination of recloser with voltage-time type of sectionalizers[J]. Power System Technology, 2006, 30(16): 45-49.
[15] 袁钦成.配电系统故障处理自动化技术[M].北京:中国电力出版社,2007.YUAN Qincheng. Automation technology for fault handling in distribution system[M]. Beijing: China Electric Power Press, 2007.
[16] 崔其会,薄纯杰,李文亮,等.10 kV 配电线路保护定值的整定探讨[J].供用电,2009,26(6):32-34.CUI Qihui, BO Chunjie, LI Wenliang, et al. Exploration on protection setting coordination of 10 kV distribution lines[J]. Distribution & Utilization, 2009, 26(6): 32-34.
[2] 刘健,刘超,张小庆,等.配电网多级继电保护配合的关键技术研究[J].电力系统保护与控制,2015,43(9):35-41.LIU Jian, LIU Chao, ZHANG Xiaoqing, et al. Coordination of relay protection for power distribution systems[J]. Power System Protection and Control, 2015, 43(9): 35-41.
[3] 刘健,张小庆,张志华.继电保护配合提高配电自动化故障处理性能[J].电力系统保护与控制,2015,43(22):10-16.LIU Jian, ZHANG Xiaoqing, ZHANG Zhihua. Improving the performance of fault location and restoration based on relay protection for distribution grids[J]. Power System Protection and Control, 2015, 43(22): 10-16.
[4] 刘健,贠保记,崔琪,等.一种快速自愈的分布智能馈线自动化系统[J].电力系统自动化,2010,34(10):82-86.LIU Jian, YUN Baoji, CUI Qi, et al. A distributed intelligent based feeder automation system with fast self-healing performance[J]. Automation of Electric Power Systems, 2010, 34(10): 82-86.
[5] 徐光福,张春合,严伟,等.基于EPON通信的智能配电网馈线差动保护[J].电力系统自动化,2014,38(2):91-96.XU Guangfu, ZHANG Chunhe, YAN Wei, et al. Feeder differential protection based on EPON communication for smart distribution networks[J]. Automation of Electric Power Systems, 2014, 38(2): 91-96.
[6] 刘健,程红丽,董海鹏,等.配电网故障判断与负荷均衡化[J].电力系统自动化,2002,26(22):34-38.LIU Jian, CHENG Hongli, DONG Haipeng, et al. Fault section identification and load balancing of distribution network[J]. Automation of Electric Power Systems, 2002, 26(22): 34-38.
[7] 费军,单渊达.配网中自动故障定位系统的研究[J].中国电机工程学报,2000,20(9):33-35.FEI Jun, SHAN Yuanda. Study of automatic fault location system in the distribution network[J]. Proceedings of the CSEE, 2000, 20(9): 33-35.
[8] 刘健,董新洲,陈星莺,等.配电网容错故障处理关键技术研究[J].电网技术,2012,35(1):253-257.LIU Jian, DONG Xinzhou, CHEN Xingying, et al. Robust fault isolation and restoration for distribution systems[J]. Power System Technology, 2012, 35(1): 253-257.
[9] 沈兵兵,吴琳,王鹏.配电自动化试点工程技术特点及应用成效分析[J].电力系统自动化,2012,36(18):27-32.SHEN Bingbing, WU Lin, WANG Peng. Technological characteristics and application effects analysis of distribution automation pilot projects[J]. Automation of Electric Power Systems, 2012, 36(18): 27-32.
[10] 刘健,张小庆,陈星莺,等.集中智能与分布智能协调配合的配电网故障处理模式[J].电网技术,2013,37(9):2608-2614.LIU Jian, ZHANG Xiaoqing, CHEN Xingying, et al. Fault location and service restoration for distribution networks based on coordination of centralized intelligence and distributed intelligence[J]. Power System Technology, 2013, 37(9): 2608-2614.
[11] 刘健,张志华,张小庆,等.继电保护与配电自动化配合的配电网故障处理[J].电力系统保护与控制,2011,39(16):53-57.LIU Jian, ZHANG Zhihua, ZHANG Xiaoqing, et al. Relay protection and distribution automation based fault allocation and restoration for distribution systems[J]. Power System Protection and Control, 2011, 39(16): 53-57.
[12] 徐丙垠,李天友,薛永端.配电网继电保护与自动化[M].北京:中国电力出版社,2017.XU Bingyin, LI Tianyou, XUE Yongduan. Relay protection and automation of electric power distribution grids[M]. Beijing: China Electric Power Press, 2017.
[13] 刘健,同向前,张小庆,等.配电网继电保护与故障处理[M].北京:中国电力出版社,2013.LIU Jian, TONG Xiangqian, ZHANG Xiaoqing, et al. Relay protection and fault processing for electric power distribution grids[M]. Beijing: China Electric Power Press, 2013.
[14] 刘健,张伟,程红丽.重合器和电压-时间型分段器配合的馈线自动化系统的参数整定[J].电网技术,2006,30(16):45-49.LIU Jian, ZHANG Wei, CHENG Hongli. The parameter setting of feeder automation system based on mutual coordination of recloser with voltage-time type of sectionalizers[J]. Power System Technology, 2006, 30(16): 45-49.
[15] 袁钦成.配电系统故障处理自动化技术[M].北京:中国电力出版社,2007.YUAN Qincheng. Automation technology for fault handling in distribution system[M]. Beijing: China Electric Power Press, 2007.
[16] 崔其会,薄纯杰,李文亮,等.10 kV 配电线路保护定值的整定探讨[J].供用电,2009,26(6):32-34.CUI Qihui, BO Chunjie, LI Wenliang, et al. Exploration on protection setting coordination of 10 kV distribution lines[J]. Distribution & Utilization, 2009, 26(6): 32-34.