适用于多点T接的新型电流差动保护
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摘要
随着近年新能源的发展以及电网建设经济性的因素,多点T接线路正在被大量使用。对多点T接线路的特征进行提取,并针对性地对常规线路保护影响进行了评估,进而提出了适用于多点T接线路的多端线路电流差动保护方案。提出的电流差动保护方案采用主从式的拓扑结构,易进行多点T接系统的扩展,并在此结构的基础上提出了基于多端系统的同步方式。提出了一种新型适用于多点T接线路的差动方程,能够解决多点T接线路可能出现的电流汲出和T点增加带来的灵敏度的问题。经过大量的动模仿真实验表明,提出的适用于多点T接线路的新型电流差动保护具有极高的灵敏性和可靠性,具有推广应用价值。
With the development of new energy and economic factor of power grid construction in recent years,multi-T nodes transmission line has been widely used.This paper extracts the fault characteristics of multi-T nodes transmission line,then evaluates the effects of the normal protection when it is applied in these special lines.A new current differential protection scheme is proposed using the topology of master-slave structure,which fits for multi-T nodes transmission line for its easy extension.On this basis,a synchronous mode based on multi-terminal system is proposed.This paper figures out a new type of current differential equation suitable for T-terminal lines which could handle the contradiction between sensitivity and reliability with multi terminals.With plenty dynamic simulation experiments,the results show that the new type of current differential protection,which is suitable for multi-T node transmission line,has high sensitivity and reliability,and has the value of popularization and application.
With the development of new energy and economic factor of power grid construction in recent years,multi-T nodes transmission line has been widely used.This paper extracts the fault characteristics of multi-T nodes transmission line,then evaluates the effects of the normal protection when it is applied in these special lines.A new current differential protection scheme is proposed using the topology of master-slave structure,which fits for multi-T nodes transmission line for its easy extension.On this basis,a synchronous mode based on multi-terminal system is proposed.This paper figures out a new type of current differential equation suitable for T-terminal lines which could handle the contradiction between sensitivity and reliability with multi terminals.With plenty dynamic simulation experiments,the results show that the new type of current differential protection,which is suitable for multi-T node transmission line,has high sensitivity and reliability,and has the value of popularization and application.
引文
[1]ZHANG Baohui,HAO Zhiguo,BO Zhiqian.New development in relay protection for smart grid[J].Protection and Control of Modern Power Systems,2016,1:7pp.DOI 10.1186/s41601-016-0025-x
[2]刘颖.提高智能变电站采样可靠性的研究与应用[J].电力系统保护与控制,2016,44(19):150-156.LIU Ying.Research on improvement of sampling reliability in smart substation and application[J].Power System Protection and Control,2016,44(19):150-156.
[3]李辉,刘盛权,冉立,等.大功率并网风电机组变流器状态监测技术综述[J].电工技术学报,2016,31(8):1-10.LI Hui,LIU Shengquan,RAN Li,et al.Overview of condition monitoring technologies of power converter for high power grid-connected wind turbine generator system[J].Transactions of China Electrotechnical Society,2016,31(8):1-10.
[4]陈鉴庆,邹旭东,梁宗泽,等.基于反向电流跟踪的双馈风机低电压穿越控制策略[J].电工技术学报,2016,31(2):221-229.CHEN Jianqing,ZOU Xudong,LIANG Zongze,et al.An improved control strategy of doubly-fed wind turbine under voltage dips based on reverse current tracking[J].Transactions of China Electrotechnical Society,2016,31(2):221-229.
[5]杨勇平,吴殿法,王宁玲.基于组合权重-优劣解距离法的火电机组性能综合评价[J].热力发电,2016,45(2):10-15.YANG Yongping,WU Dianfa,WANG Ningling.Comprehensive evaluation for large scale coal-fired power units based on combined weight and TOPSIS method[J].Thermal Power Generation,2016,45(2):10-15.
[6]何青,刘辉,刘文毅.风电-压缩空气储能系统火用和火用成本分析模型[J].热力发电,2016,45(2):34-39.HE Qing,LIU Hui,LIU Wenyi.Exergy and exergy cost analysis model for wind-compressed air energy storage[J].Thermal Power Generation,2016,45(2):34-39.
[7]袁冰,王宾,陆元园,等.风电场并网线路单相接地故障单端测距误差特性分析[J].电力系统保护与控制,2016,44(19):63-69.YUAN Bing,WANG Bin,LU Yuanyuan,et al.Error analysis of single-end fault location for single-lineto-ground fault in transmission line with wind farm connection[J].Power System Protection and Control,2016,44(19):63-69.
[8]刘鹏程,李新利.基于多种群遗传算法的含分布式电源的配电网故障区段定位算法[J].电力系统保护与控制,2016,44(2):36-41.LIU Pengcheng,LI Xinli.Fault-section location of distribution network containing distributed generation based on the multiple-population genetic algorithm[J].Power System Protection and Control,2016,44(2):36-41.
[9]丁少倩,林涛,翟学,等.基于短路容量的含大规模新能源接入的电网状态脆弱性评估方法研究[J].电力系统保护与控制,2016,44(13):40-47.DING Shaoqian,LIN Tao,ZHAI Xue,et al.Research on state vulnerability assessment method of grid with large scale new energy sources based on short-circuit capability[J].Power System Protection and Control,2016,44(13):40-47.
[10]丁恒春,彭时雄,杜新纲,等.一个半断路器接线方式下并联运行电流互感器二次和电流误差分析[J].电测与仪表,2008,45(12):1-3,62.DING Hengchun,PENG Shixiong,DU Xingang,et al.Error analysis of resultant secondary current of two paralleled current transformers under breaker-and-a-half scheme[J].Electrical Measurement&Instrumentation,2008,45(12):1-3,62.
[11]马欣彤,周迎秋,金华锋,等.广域智能控制系统平台构建方案[J].黑龙江电力,2012,34(4):292-295.MA Xintong,ZHOU Yingqiu,JIN Huafeng,et al.Formulation of wide intelligent control system platform[J].Heilongjiang Electric Power,2012,34(4):292-295.
[12]任雁铭,操丰梅.IEC61850新动向和新应用[J].电力系统自动化,2013,37(2):1-6.REN Yanming,CAO Fengmei.New development and new application of IEC 61850[J].Automation of Electric Power Systems,2013,37(2):1-6.
[13]王阳光,尹项根,游大海,等.遵循IEC61850标准的广域电流差动保护IED[J].电力系统自动化,2008,32(2):53-57.WANG Yangguang,YIN Xianggen,YOU Dahai,et al.Development of wide area current differenttial protection IED conforming with IEC 61850[J].Automation of Electric Power Systems,2008,32(2):53-57.
[14]丁伟,何奔腾,王慧芳,等.广域继电保护系统研究综述[J].电力系统保护与控制,2012,40(1):145-155.DING Wei,HE Benteng,WANG Huifang,et al.Overview of wide-area relaying protection system[J].Power System Protection and Control,2012,40(1):145-155.
[15]沈全荣,严伟,梁乾兵,等.异步法电流互感器饱和判别新原理及其应用[J].电力系统自动化,2005,29(16):84-86.SHEN Quanrong,YAN Wei,LIANG Qianbing,et al.Asynchronous method for the recognition of current transformer saturation and its application[J].Automation of Electric Power Systems,2005,29(16):84-86.
[16]李岩,陈德树,张哲,等.鉴别TA饱和的改进时差法研究[J].继电器,2001,29(11):1-4.LI Yan,CHEN Deshu,ZHANG Zhe,et al.Research of the improved time difference method to distinguish TA saturation[J].Relay,2001,29(11):1-4.
[17]李瑞生,路光辉,王强.用于线路差动保护的电流互感器饱和判据[J].电力自动化设备,2004,24(4):70-73.LI Ruisheng,LU Guanghui,WANG Qiang.Transformer saturation criterion for line differential protection[J].Electric Power Automation Equipment,2004,24(4):70-73.
[18]陈丽艳,何奔腾.一种基于负荷电流检测的电流互感器饱和识别辅助判据[J].电力系统保护与控制,2010,38(18):69-73.CHEN Liyan,HE Benteng.An assistant criterion for distinguishing current transformer saturation based on the load current detection[J].Power System Protection and Control,2010,38(18):69-73.
[19]胡家为,葛荣尚.CT过饱和特性及对过流速断保护的影响[J].电力系统保护与控制,2013,41(16):133-137.HU Jiawei,GE Rongshang.Characteristics of CT oversaturation and its influence on overcurrent instantaneous trip protection[J].Power System Protection and Control,2013,41(16):133-137.
[2]刘颖.提高智能变电站采样可靠性的研究与应用[J].电力系统保护与控制,2016,44(19):150-156.LIU Ying.Research on improvement of sampling reliability in smart substation and application[J].Power System Protection and Control,2016,44(19):150-156.
[3]李辉,刘盛权,冉立,等.大功率并网风电机组变流器状态监测技术综述[J].电工技术学报,2016,31(8):1-10.LI Hui,LIU Shengquan,RAN Li,et al.Overview of condition monitoring technologies of power converter for high power grid-connected wind turbine generator system[J].Transactions of China Electrotechnical Society,2016,31(8):1-10.
[4]陈鉴庆,邹旭东,梁宗泽,等.基于反向电流跟踪的双馈风机低电压穿越控制策略[J].电工技术学报,2016,31(2):221-229.CHEN Jianqing,ZOU Xudong,LIANG Zongze,et al.An improved control strategy of doubly-fed wind turbine under voltage dips based on reverse current tracking[J].Transactions of China Electrotechnical Society,2016,31(2):221-229.
[5]杨勇平,吴殿法,王宁玲.基于组合权重-优劣解距离法的火电机组性能综合评价[J].热力发电,2016,45(2):10-15.YANG Yongping,WU Dianfa,WANG Ningling.Comprehensive evaluation for large scale coal-fired power units based on combined weight and TOPSIS method[J].Thermal Power Generation,2016,45(2):10-15.
[6]何青,刘辉,刘文毅.风电-压缩空气储能系统火用和火用成本分析模型[J].热力发电,2016,45(2):34-39.HE Qing,LIU Hui,LIU Wenyi.Exergy and exergy cost analysis model for wind-compressed air energy storage[J].Thermal Power Generation,2016,45(2):34-39.
[7]袁冰,王宾,陆元园,等.风电场并网线路单相接地故障单端测距误差特性分析[J].电力系统保护与控制,2016,44(19):63-69.YUAN Bing,WANG Bin,LU Yuanyuan,et al.Error analysis of single-end fault location for single-lineto-ground fault in transmission line with wind farm connection[J].Power System Protection and Control,2016,44(19):63-69.
[8]刘鹏程,李新利.基于多种群遗传算法的含分布式电源的配电网故障区段定位算法[J].电力系统保护与控制,2016,44(2):36-41.LIU Pengcheng,LI Xinli.Fault-section location of distribution network containing distributed generation based on the multiple-population genetic algorithm[J].Power System Protection and Control,2016,44(2):36-41.
[9]丁少倩,林涛,翟学,等.基于短路容量的含大规模新能源接入的电网状态脆弱性评估方法研究[J].电力系统保护与控制,2016,44(13):40-47.DING Shaoqian,LIN Tao,ZHAI Xue,et al.Research on state vulnerability assessment method of grid with large scale new energy sources based on short-circuit capability[J].Power System Protection and Control,2016,44(13):40-47.
[10]丁恒春,彭时雄,杜新纲,等.一个半断路器接线方式下并联运行电流互感器二次和电流误差分析[J].电测与仪表,2008,45(12):1-3,62.DING Hengchun,PENG Shixiong,DU Xingang,et al.Error analysis of resultant secondary current of two paralleled current transformers under breaker-and-a-half scheme[J].Electrical Measurement&Instrumentation,2008,45(12):1-3,62.
[11]马欣彤,周迎秋,金华锋,等.广域智能控制系统平台构建方案[J].黑龙江电力,2012,34(4):292-295.MA Xintong,ZHOU Yingqiu,JIN Huafeng,et al.Formulation of wide intelligent control system platform[J].Heilongjiang Electric Power,2012,34(4):292-295.
[12]任雁铭,操丰梅.IEC61850新动向和新应用[J].电力系统自动化,2013,37(2):1-6.REN Yanming,CAO Fengmei.New development and new application of IEC 61850[J].Automation of Electric Power Systems,2013,37(2):1-6.
[13]王阳光,尹项根,游大海,等.遵循IEC61850标准的广域电流差动保护IED[J].电力系统自动化,2008,32(2):53-57.WANG Yangguang,YIN Xianggen,YOU Dahai,et al.Development of wide area current differenttial protection IED conforming with IEC 61850[J].Automation of Electric Power Systems,2008,32(2):53-57.
[14]丁伟,何奔腾,王慧芳,等.广域继电保护系统研究综述[J].电力系统保护与控制,2012,40(1):145-155.DING Wei,HE Benteng,WANG Huifang,et al.Overview of wide-area relaying protection system[J].Power System Protection and Control,2012,40(1):145-155.
[15]沈全荣,严伟,梁乾兵,等.异步法电流互感器饱和判别新原理及其应用[J].电力系统自动化,2005,29(16):84-86.SHEN Quanrong,YAN Wei,LIANG Qianbing,et al.Asynchronous method for the recognition of current transformer saturation and its application[J].Automation of Electric Power Systems,2005,29(16):84-86.
[16]李岩,陈德树,张哲,等.鉴别TA饱和的改进时差法研究[J].继电器,2001,29(11):1-4.LI Yan,CHEN Deshu,ZHANG Zhe,et al.Research of the improved time difference method to distinguish TA saturation[J].Relay,2001,29(11):1-4.
[17]李瑞生,路光辉,王强.用于线路差动保护的电流互感器饱和判据[J].电力自动化设备,2004,24(4):70-73.LI Ruisheng,LU Guanghui,WANG Qiang.Transformer saturation criterion for line differential protection[J].Electric Power Automation Equipment,2004,24(4):70-73.
[18]陈丽艳,何奔腾.一种基于负荷电流检测的电流互感器饱和识别辅助判据[J].电力系统保护与控制,2010,38(18):69-73.CHEN Liyan,HE Benteng.An assistant criterion for distinguishing current transformer saturation based on the load current detection[J].Power System Protection and Control,2010,38(18):69-73.
[19]胡家为,葛荣尚.CT过饱和特性及对过流速断保护的影响[J].电力系统保护与控制,2013,41(16):133-137.HU Jiawei,GE Rongshang.Characteristics of CT oversaturation and its influence on overcurrent instantaneous trip protection[J].Power System Protection and Control,2013,41(16):133-137.