含分布式发电的配电网安全风险评估的研究
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摘要
随着分布式发电技术快速发展,分布式电源在配电系统中的渗透率越来越高,与此带来的安全影响不可忽视,需要进行有效的安全评估。提出了基于层次分析法的综合评估算法(CEA-AHP),该算法通过建立分布式电源接入电网的节点模型,结合配电网灵活的结构特性,利用效用理论,从低电压风险、负荷过载风险和失负荷风险三个方面对该类配电网进行安全风险综合评估。采用IEEE33节点配电系统,通过对原配电系统、加入DG后配电系统及切除部分联络线后系统进行分析验证,表明该算法能够准确反映同一假想故障不同重构方案下和不同假想故障下电网安全性的相对高低,为含分布式的配电网安全风险评估、检修和规划提供可靠参考。
With the rapid development of DG technology, penetration rate of DG from distribution network is increasing, meanwhile the security influence cannot be ignored which need effective security evaluation. The comprehensive evaluation algorithm based on analytic hierarchy process( CEA-AHP) is presented DG node model to power grid is established, combining flexible structure quality of distribution network, the security risk of this kind of power grid is comprehensively evaluated by using utility theory, through low voltage risk,overload risk and loss of load risk three aspects. Adopting IEEE 33 nodes distribution network system, by analyzing the original system, considering DG system and system of cutting a tie-line, the example has shown this kind of evaluation can reflect relative level of power grid security under different hypothetical accidents and the various reconfiguration method in a certain accident, providing reliable reference for assessment,overhaul and planning about distribution network considering DG.
With the rapid development of DG technology, penetration rate of DG from distribution network is increasing, meanwhile the security influence cannot be ignored which need effective security evaluation. The comprehensive evaluation algorithm based on analytic hierarchy process( CEA-AHP) is presented DG node model to power grid is established, combining flexible structure quality of distribution network, the security risk of this kind of power grid is comprehensively evaluated by using utility theory, through low voltage risk,overload risk and loss of load risk three aspects. Adopting IEEE 33 nodes distribution network system, by analyzing the original system, considering DG system and system of cutting a tie-line, the example has shown this kind of evaluation can reflect relative level of power grid security under different hypothetical accidents and the various reconfiguration method in a certain accident, providing reliable reference for assessment,overhaul and planning about distribution network considering DG.
引文
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[13]徐青山.分布式发电与微电网技术[M].北京:人民邮电出版社,2011.
[2]徐萌,邹贵彬,高磊,等.含逆变型分布式电源的配电网正序阻抗纵联保护[J].电力系统自动化,2017,(12):93-99.XU Meng,ZOU Guibin,GAO Lei,et al.Pilot protection of positive sequence component impedance for distribution network with inverter interfaced distributed generator[J].Automation of Electric Power Systems,2017,(12):93-99.
[3]周念成,孟潇潇,王强钢.考虑逆变型分布式电源时滞的孤岛微网小信号稳定分析[J].电力系统自动化,2017(12):20-25.ZHOU Niancheng,MENG Xiaoxiao,WANGQianggang.Small signal stability analysis of islanded microgrid considering time-delay effect of inverter interfaced distributed generator[J].Automation of Electric Power Systems,2017(12):20-25.
[4]王博,肖峻,周济.主动配电网中分布式电源和微网的运行域[J].电网技术,2017,41(2):363-370.WANG Bo,XI AO Jun,ZHOU Ji,et al.Dispatchable region of distributed generators and microgrids in distribution systems[J].Power System Technology,2017,41(2):363-370.
[5]NIKMEHR Nima,NAIAFI RAVADANEGH Sajad.Optimal power dispatch of multi-microgrids at future smart distribution grids[J].IEEE Transactions on Smart Grid,2015,6(4):1648-1657.
[6]缪源诚,程浩忠,龚小雪,等.含微网的配电网接线模式探讨[J].中国电机工程学报,2012,32(1):17-23.MIAO Yuancheng,CHENG Haozhong,GONGXiaoxue,et al.Evaluation of a distribution network connection mode considering micro-grid[J].Proceeding of the CSEE,2012,32(1):17-23.
[7]李志奇,吕林,张燃.含微网的新型配电网可靠性分析[J].华东电力,2012,40(5):803-807.LI Zhiqi,LV Lin,ZHANG Ran.Reliabilty of distribution network with microgrid[J].East China Electric Power,2012,40(5):803-807.
[8]阎鼎,龙禹,程浩忠,等.规划阶段含微网的配电网电能质量评估[J].电力系统及其自动化学报,2013,25(6):9-15.YAN Ding,LONG Yu,CHENG Haozhong,et al.Power quality assessment for distribution network incorporating micro-grid in planning stage[J].Proceedings of the CSU-EPSA,2013,25(6):9-15.
[9]王旭强,刘广一,曾沅,等.分布式电源接入下配电网电压无功控制效果分析[J].电力系统保护与控制,2014,42(1):47-53.WANG Xuqiang,LIU Guangyi,ZENG Yuan,et al.Analysis on the effects of volt/var control method considering distribution generation[J].Power System Protection and Control,2014,42(1):47-53.
[10]陈芳,王玮,徐丽杰,等.分布式电源接入对配电网电压变化的分析[J].电力系统自动化学报,2012,24(4):145-149.CHENG Fang,WANG Wei,XU Lijie,et al.Analyzing the voltage variation of distribution network including distributied generation[J].Proceedings of the CSU-EPSA,2012,24(4):145-149.
[11]彭俊好,徐国爱,杨义先,等.基于效用的安全风险度量模型[J].北京邮电大学学报,2006,29(2):59-61.PENG Junhao,XU Guoai,YANG Yixian,et al.Mea sure model of security riskbased on utility[J].Journal of Beijing University of Posts and Telecommunications,2006,29(2):59-61,69.
[12]张国华,段满银,张建华,等.基于证据理论和效用理论的电力系统风险评估[J].电力系统自动化,2009,33(23):1-4.ZHANG Guohua,DUAN Manyin,ZHANG Jianhua,et al.Power system risk assessment based on the evidence theory and utility theory[J].Automation of Electric Power Systems,2009,33(23):1-4,47.
[13]徐青山.分布式发电与微电网技术[M].北京:人民邮电出版社,2011.