考虑直流分量的短路电流衰减实用计算方法研究
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摘要
目前,短路电流实用计算中缺乏同时考虑短路电流周期分量和非周期分量衰减的方法,特别是针对非周期分量衰减计算的相关研究更少。提出不用传统计算曲线、考虑多机复杂电网实际接线和实际机组参数的短路电流周期分量衰减实用计算方法。此外,提出考虑实际电网结构用转移阻抗求取非周期分量的衰减。基于所提方法完成短路电流计算模块的开发,可直接对BPA数据格式的电网进行短路计算,计算结果经与用EMTP对同一案例计算结果的比较分析,验证了该模块的准确性。
At present,in short-circuit current calculation,it is lack of a practical method for simultaneously considering attenuation of periodic and aperiodic components.In particular,there are few studies on calculation of aperiodic component attenuation.Instead of using traditional computational curve,a practical method for calculating attenuation of the periodic component is presented considering actual topological structure of multi-machine complex power grid and actual generator unit parameters.Based on actual power grid structure,a method of calculating attenuation of the aperiodic component is also proposed using transfer impedance theory.A short circuit current calculation module is developed with the presented method and used to analyze the short circuit current of power grid in BPA data format.The developed module is used to calculate examples and its accuracy is verified by comparison between calculated results of the module and calculated results with EMTP.
At present,in short-circuit current calculation,it is lack of a practical method for simultaneously considering attenuation of periodic and aperiodic components.In particular,there are few studies on calculation of aperiodic component attenuation.Instead of using traditional computational curve,a practical method for calculating attenuation of the periodic component is presented considering actual topological structure of multi-machine complex power grid and actual generator unit parameters.Based on actual power grid structure,a method of calculating attenuation of the aperiodic component is also proposed using transfer impedance theory.A short circuit current calculation module is developed with the presented method and used to analyze the short circuit current of power grid in BPA data format.The developed module is used to calculate examples and its accuracy is verified by comparison between calculated results of the module and calculated results with EMTP.
引文
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[10]靳希,张文青,刘蓓,等.基于ATP-EMTP的上海电网短路电流直流分量衰减特性分析[J].华东电力,2010(10):1554-1557.Jin Xi,Zhang Wenqing,Liu Bei,et al.Analysis of decaying characteristics of DC component of short circuit current in Shanghai Grid based on ATP-EMTP[J].East China Electric Power,2010(10):1554-1557(in Chinese).
[11]邱晓燕,刘天琪,黄媛.电力系统分析的计算机算法[M].北京:中国电力出版社,2009.
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[13]曹炜,张美霞.短路电流计算曲线法及其改进[J].上海电力学院学报,2006(4):327-329.Cao Wei,Zhang Meixia.The evaluation and amendment on the method of power system short-circuit current computational curve[J].Journal of Shanghai University of Electric Power,2006(4):327-329(in Chinese).
[14]李光琦.电力系统暂态分析(第二版)[M].北京:中国电力出版社,1995.
[15]DL/T1234—2013,电力系统安全稳定计算技术规范[S].北京:中国电力出版社,2013.
[16]Lezama G,Ramon F.Prediction and control of transient instability using wide area phasor measurements[D].University of Maniboba(Canada),2012.
[2]袁娟,刘文颖,董明齐,等.西北电网短路电流的限制措施[J].电网技术,2007,31(10):42-45.Yuan Juan,Liu Wenying,Dong Mingqi,et al.Application of measures limiting short circuit currents in Northwest China Power Grid[J].Power System Technology,2007,31(10):42-45(in Chinese).
[3]潘晓杰,张顺,文汀,等.渝鄂异步互联对华中电网运行特性的影响[J].电力系统保护与控制,2016,44(19):157-162.Pan Xiaojie,Zhang Shun,Wen Ting,et al.Operation characteristic analysis of central China power grid in unsynchronized interconnection of Chongqing and Hubei Power Grid Power[J].Power System Protection and Control,2016,44(19):157-162(in Chinese).
[4]曹炜,王永生,张文青,等.电力系统短路电流直流分量及其对断路器开断能力的影响[J].电网技术,2012,36(3):283-288.Cao Wei,Wang Yongsheng,Zhang Wenqing,et al.Analysis on DC component in short-circuit current of power grid and its influence on breaking ability of circuit breakers[J].Power System Technology,2012,36(3):283-288(in Chinese).
[5]曹炜,宋磊,刘尹.大容量汽轮发电机短路电流值与典型计算曲线值的对比分析[J].华东电力,2007(1):33-36.Cao Wei,Song Lei,Liu Yin.Comparative analysis of short-circuit currents of large capacity turbo generators and typical computational short circuit current curves[J].East China Electric Power,2007(1):33-36(in Chinese).
[6]GB/T 15544—2013,三相交流系统短路电流计算标准[S].北京:中国标准出版社,2013.
[7]NB/T35043—2014,水电工程三相交流系统短路电流计算[S].北京:中国电力出版社,2015.
[8]水利电力西北电力设计院.电力工程电气设计手册:电气一次部分[M].北京:中国电力出版社,1989:140.
[9]曹炜,王永生,丁北平,等.基于包络线和函数拟合的录波数据分析[J].上海电力学院学报,2010,26(4):315-318.Cao Wei,Wang Yongsheng,Ding Beiping,et al.Analytical study of fault recording data based on envelopes and function fitting[J].Journal of Shanghai University of Electric Power,2010,26(4):315-318(in Chinese).
[10]靳希,张文青,刘蓓,等.基于ATP-EMTP的上海电网短路电流直流分量衰减特性分析[J].华东电力,2010(10):1554-1557.Jin Xi,Zhang Wenqing,Liu Bei,et al.Analysis of decaying characteristics of DC component of short circuit current in Shanghai Grid based on ATP-EMTP[J].East China Electric Power,2010(10):1554-1557(in Chinese).
[11]邱晓燕,刘天琪,黄媛.电力系统分析的计算机算法[M].北京:中国电力出版社,2009.
[12]车立志,朱永利,龚仁敏.有限大电源系统短路电流的一种计算机求解方法[J].电力科学与工程,2004(1):40-43.Che Lizhi,Zhu Yongli,Gong Renmin.Computerized calculation of short-circuit currents for finite power source systems[J].Electric Power Science and Engineering,2004(1):40-43(in Chinese).
[13]曹炜,张美霞.短路电流计算曲线法及其改进[J].上海电力学院学报,2006(4):327-329.Cao Wei,Zhang Meixia.The evaluation and amendment on the method of power system short-circuit current computational curve[J].Journal of Shanghai University of Electric Power,2006(4):327-329(in Chinese).
[14]李光琦.电力系统暂态分析(第二版)[M].北京:中国电力出版社,1995.
[15]DL/T1234—2013,电力系统安全稳定计算技术规范[S].北京:中国电力出版社,2013.
[16]Lezama G,Ramon F.Prediction and control of transient instability using wide area phasor measurements[D].University of Maniboba(Canada),2012.