适用于后备保护整定计算的阶段式发电机模型
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摘要
目前,保护整定计算中,发电机常采用次暂态模型来简化计算,但该模型未考虑短路电流随时间的衰减,而后备保护具有延时特性,采用发电机次暂态模型进行后备保护整定计算将降低保护定值的精度。为提高后备保护整定计算的精度,提出了阶段式发电机模型,基于在后备保护典型时间节点处获取线路故障时发电机输出的电气量特性,得到该时间段等效的发电机静态模型,继而构成适用于后备保护整定计算的阶段式发电机模型。最后,在IEEE 39节点系统中仿真验证了该模型可以进一步提高后备保护整定计算的定值精度。
The sub-transient generator model is commonly used in protection setting calculation to simplify calculation,but it does not consider that short circuit current decays along with time,and the backup protection has the feature of time delay. The accuracy of protection setting values will be reduced by using the sub-transient generator model in backup protection setting calculation. In order to improve the accuracy of backup protection setting calculation,a stage generator model is proposed. Based on the electrical characteristics of generator at the typical time of backup protection,the equivalent static generator model can be obtained and then the stage generator model suitable for backup protection setting calculation can be formed. Simulation based on IEEE 39-bus system verifies that the stage generator model can improve the accuracy of backup protection setting calculation.
The sub-transient generator model is commonly used in protection setting calculation to simplify calculation,but it does not consider that short circuit current decays along with time,and the backup protection has the feature of time delay. The accuracy of protection setting values will be reduced by using the sub-transient generator model in backup protection setting calculation. In order to improve the accuracy of backup protection setting calculation,a stage generator model is proposed. Based on the electrical characteristics of generator at the typical time of backup protection,the equivalent static generator model can be obtained and then the stage generator model suitable for backup protection setting calculation can be formed. Simulation based on IEEE 39-bus system verifies that the stage generator model can improve the accuracy of backup protection setting calculation.
引文
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[18]陶华,许津津,邹文聪. BPA向PSCAD模型转换的研究[J].电力自动化设备,2013,33(8):152-156.TAO Hua,XU Jinjin,ZOU Wencong. Model conversion from BPA to PSCAD[J]. Electric Power Automation Equipment,2013,33(8):152-156.
[19]中华人民共和国国家发展和改革委员会. 220 kV~750 k V电网继电保护装置运行整定规程:DL/T559—2007[S].北京:中国电力出版社,2007.
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[2]AE E,OE R,JA G. Simulation of protective relay performance under short-circuit and transient swing conditions[J]. IEEE Transactions on Industry Applications,2002,26(2):1108-1115.
[3]段献忠,杨增力,程逍.继电保护在线整定和离线整定的定值性能比较[J].电力系统自动化,2005,29(19):58-61.DUAN Xianzhong,YANG Zengli,CHENG Xiao. Performance analysis of relay settings determined according to off-line calculation and on-line calculation[J]. Automation of Electric Power Systems,2005,29(19):58-61.
[4]赵宇,王慧芳,王晓保,等.基于增量因子的后备保护在线整定方法[J].电网技术,2014,38(1):269-274.ZHAO Yu,WANG Huifang,WANG Xiaobao,et al. Increment factors based online setting for backup protection[J]. Power System Technology,2014,38(1):269-274.
[5]李玮,尹刚志,东立荣.继电保护整定计算中故障计算模型的选择和形成[J].华北电力技术,2010(5):25-28.LI Wei,YIN Gangzhi,DONG Lirong. Selection and formulation of fault calculation model for power relay projection calculation[J].North China Electric Power,2010(5):25-28.
[6]吴红斌,丁明,李生虎,等.发电机和负荷模型对暂态稳定性影响的概率分析[J].电网技术,2004,28(1):19-21,47.WU Hongbin,DING Ming,LI Shenghu,et al. Probabilistic analysis on influences of generator model and load model on transient stability[J]. Power System Technology,2004,28(1):19-21,47.
[7]靳希,段开元,张文青.基于PSS/E的短路电流衰减影响因素分析[J].电力科学与技术学报,2010,25(3):61-65.JIN Xi,DUAN Kaiyuan,ZHANG Wenqing. Analysis of influencing factors on short-circuit decay base on PSS/E[J]. Journal of Electric Power Science and Technology,2010,25(3):61-65.
[8]张玮,潘贞存,赵建国.新的防止大停电事故的后备保护减载控制策略[J].电力系统自动化,2007,31(8):27-31.ZHANG Wei,PAN Zhencun,ZHAO Jianguo. New load shedding control strategy for backup protection against cascading outages[J].Automation of Electric Power Systems,2007,31(8):27-31.
[9]国家能源局.国家能源局综合司关于做好电网安全运行的紧急通知[EB/OL].(2016-06-27)[2017-08-20]. http:∥www.nea.gov.cn/2016-06/27/c_135470144.htm.
[10]毛锦庆,王澎.从简化整定计算论线路的微机型继电保护装置[J].电力自动化设备,2004,24(11):94-98.MAO Jinqing,WANG Peng. Discussion of microprocessor-based protection equipment on setting calculation simplification[J]. Electric Power Automation Equipment,2004,24(11):94-98.
[11]倪以信,陈寿孙,张宝霖.动态电力系统的理论和分析[M].北京:清华大学出版社,2002:45-59.
[12]余一平,宋忠鹏,鞠平,等.同步发电机简化模型的等效阻尼系数分析[J].电力自动化设备,2013,33(11):15-21.YU Yiping,SONG Zhongpeng,JU Ping,et al. Analysis of equivalent damping coefficient for simplified model of synchronous generator[J]. Electric Power Automation Equipment,2013,33(11):15-21.
[13]孙黎霞,鞠平,高运华,等.基于Park模型的同步发电机参数辨识[J].中国电机工程学报,2009,29(19):50-56.SUN Lixia,JU Ping,GAO Yunhua,et al. Parameter estimation of synchronous generator based on Park model[J]. Proceedings of the CSEE,2009,29(19):50-56.
[14]薛卿.同步发电机参数对不同假设模型影响的研究[D].保定:华北电力大学,2011.XUE Qing. Research of the impact of synchronous generator parameters on models under hypotheses[D]. Baoding:North China Electric Power University,2011.
[15]黄其新,孙黎霞,甄威,等.同步发电机参数辨识的蚁群算法及扰动分析[J].电力自动化设备,2009,29(11):50-53.HUANG Qixin,SUN Lixia,ZHEN Wei,et al. Ant colony optimization algorithm and disturbance analysis of synchronous generator parameter identification[J]. Electric Power Automation Equipment,2009,29(11):50-53.
[16] PRABHA K. Power system stability and control[M]. New York,USA:Mc Graw-Hill,1994:33-65.
[17]崔小磊,赵书强,闫健杰.快速求解多机系统机电振荡模式的新算法[J].电力自动化设备,2006,26(6):36-39.CUI Xiaolei,ZHAO Shuqiang,YAN Jianjie. Electromechanical mode fast calculation of multi-machine power system[J]. Electric Power Automation Equipment,2006,26(6):36-39.
[18]陶华,许津津,邹文聪. BPA向PSCAD模型转换的研究[J].电力自动化设备,2013,33(8):152-156.TAO Hua,XU Jinjin,ZOU Wencong. Model conversion from BPA to PSCAD[J]. Electric Power Automation Equipment,2013,33(8):152-156.
[19]中华人民共和国国家发展和改革委员会. 220 kV~750 k V电网继电保护装置运行整定规程:DL/T559—2007[S].北京:中国电力出版社,2007.
[20]何仰赞,温增银.电力系统分析(上册)[M]. 3版.武汉:华中科技大学出版社,2002:129-130,175.
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