基于熵权理论的特高压电网落点规划
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摘要
从评价特高压电网运行特性出发,提出反映电网运行安全性、可靠性和经济性的潮流分布、母线电压水平、短路容量、多馈入有效短路比、短路电流水平、过载安全裕度、工程投资、网络损耗等指标体系,并由此构成评估特高压电网落点备选方案特征的基本指标集;在此基础上,结合熵权理论和专家经验确定综合权重,对基本指标进行修正,并以备选方案指标与理想最优方案指标的贴近度作为特高压落点规划问题的目标函数,完成备选方案的综合评估和最优方案的确定,实现对落点规划问题的高效求解。最后以山东电网特高压直流落点规划为例,验证了所提规划方法的有效性。
Based on the operational characteristics of UHV(ultra-high voltage) power grid,an index system is presented to evaluate the operation security,reliability and economy of the power grid,which include such indices as power flow distribution,bus voltage level,short circuit capacity,multi-infeed effective short circuit ratio,short circuit level,overload security margin and grid loss,and a matrix of basic indices is thus established to evaluate the performance of alternative schemes of UHV terminals.The matrix is improved based on the entropy weight and expert experience.By taking the approach degree between the indices of alternative schemes and that of the ideal optimal scheme as the objective function of UHV terminal planning,the optimal scheme is determined after comprehensive evaluation of the proposed alternative schemes,thus realizing the effective solution to the problems of terminal planning.Finally,the UHVDC terminal planning of Shandong grid is taken as a case study to demonstrate the effectiveness of the pro-posed method.
Based on the operational characteristics of UHV(ultra-high voltage) power grid,an index system is presented to evaluate the operation security,reliability and economy of the power grid,which include such indices as power flow distribution,bus voltage level,short circuit capacity,multi-infeed effective short circuit ratio,short circuit level,overload security margin and grid loss,and a matrix of basic indices is thus established to evaluate the performance of alternative schemes of UHV terminals.The matrix is improved based on the entropy weight and expert experience.By taking the approach degree between the indices of alternative schemes and that of the ideal optimal scheme as the objective function of UHV terminal planning,the optimal scheme is determined after comprehensive evaluation of the proposed alternative schemes,thus realizing the effective solution to the problems of terminal planning.Finally,the UHVDC terminal planning of Shandong grid is taken as a case study to demonstrate the effectiveness of the pro-posed method.
引文
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[14]聂宏展,吕盼,乔怡,等.基于熵权法的输电网规划方案模糊综合评价[J].电网技术,2009,33(11):71-77.NIE Hongzhan,L Pan,QIAO Yi,et al.Comprehensive fuzzy evaluation for transmission network planning scheme based on entropy weight method[J].Power System Technology,2009,33(11):71-77.
[15]邱菀华.管理决策熵学及其应用[M].北京:中国电力出版社,2011:168-172.
[16]运筹学教材编写组.运筹学[M].北京:清华大学出版社,2005.
[17]程平,刘伟.多属性群决策中一种基于主观偏好确定属性权重的方法[J].控制与决策,2013,25(11):1645-1650.CHENG Ping,LIU Wei.Method of determining attributes weights based on subjective preference in multi-attribute group decisionmaking[J].Control and Decision,2009,25(11):1645-1650.
[2]王春亮,宋艺航.中国电力资源供需区域分布与输送状况[J].电网与清洁能源,2015,31(1):69-74.WANG Chunliang,SONG Yihang.Distribution of power resource demand and supply regions and power transmission in China[J].Power System and Clean Energy,2015,31(1):69-74.
[3]肖谭南,肖帅,王建全,等.基于PSO的特高压交流变电站布点、直流落点及新建线路自动选择方法[J].高电压技术,2015,31(3):815-823.XIAO Tannan,XIAO Shuai,WANG Jianquan,et al.Method for automatically determining UHV AC substation location,DC access point and new lines based on PSO[J].High Voltage Engineering,2015,31(3):815-823.
[4]王康,刘崇茹,韩民晓,等.兼顾稳定性与经济性的交直流系统直流落点选择方法[J].电力系统自动化,2011,35(24):73-78.WANG Kang,LIU Chongru,HAN Minxiao,et al.A method of selecting DC links termination at AC locations considering stability and economy at once[J].Automation of Electric Power Systems,2011,35(24):73-78.
[5]郭小江,郭剑波,马世英,等.基于多馈入短路比的多直流落点选择方法[J].中国电机工程学报,2013,33(10):36-42.GUO Xiaojiang,GUO Jianbo,MA Shiying,et al.A method for multi DC terminal location selection based on multi-infeed short circuitratio[J].Proceedings of the CSEE,2013,33(10):36-42.
[6]周勤勇,刘玉田,汤涌.计及直流权重的多直流馈入落点选择方法[J].电网技术,2013,37(12):3336-3341.ZHOU Qinyong,LIU Yutian,TANG Yong.A method to select terminal locations in multi-infeed HVDC power transmission system considering weights of HVDC transmission lines[J].Power System Technology,2013,37(12):3336-3341.
[7]吴耀文,马溪原,方华亮,等.规模风电特高压专用通道落点优选方法[J].中国电机工程学报,2012,32(1):9-16.WU Yaowen,MA Xiyuan,FANG Hualiang,et al.Selection method of optimal cccess point for large scale wind power transmission UHV corridor[J].Proceedings of the CSEE,2012,32(1):9-16.
[8]电力系统安全稳定导则:DL 755—2001[S].
[9]电力系统技术导则:SD 131—1984[S].
[10]电力系统安全稳定计算技术规范:DL/T 1234—2013[S].
[11]沈阳武,彭晓涛,毛荀,等.特高压落点规划的评价指标体系和方法[J].电网技术,2012,36(12):44-53.SHEN Yangwu,PENG Xiaotao,MAO Xun,et al.Comprehensive evaluation indexes framework and evaluation method on location layout of UHV substations[J].Power System Technology,2012,36(12):44-53.
[12]林伟芳,汤涌,卜广全.多馈入交直流系统短路比的定义和应用[J].中国电机工程学报,2008,28(31):1-8.LIN Weifang,TANG Yong,BU Guangquan.Definition and applicationof short circuit ratio for multi-infeed AC/DC power system[J].Proceedings of the CSEE,2008,28(31):1-8.
[13]林济铿,李童飞,赵子明,等.基于熵权模糊综合评价模型的电力系统黑启动方案评估[J].电网技术,2012,36(2):115-120.LIN Jikeng,LI Tongfei,ZHAO Ziming,et al.Assessment on power system black-start schemes based on entropy-weighted fuzzy comprehensive evaluation model[J].Power System Technology,2012,36(2):115-120.
[14]聂宏展,吕盼,乔怡,等.基于熵权法的输电网规划方案模糊综合评价[J].电网技术,2009,33(11):71-77.NIE Hongzhan,L Pan,QIAO Yi,et al.Comprehensive fuzzy evaluation for transmission network planning scheme based on entropy weight method[J].Power System Technology,2009,33(11):71-77.
[15]邱菀华.管理决策熵学及其应用[M].北京:中国电力出版社,2011:168-172.
[16]运筹学教材编写组.运筹学[M].北京:清华大学出版社,2005.
[17]程平,刘伟.多属性群决策中一种基于主观偏好确定属性权重的方法[J].控制与决策,2013,25(11):1645-1650.CHENG Ping,LIU Wei.Method of determining attributes weights based on subjective preference in multi-attribute group decisionmaking[J].Control and Decision,2009,25(11):1645-1650.