基于特征量测量的配电网实时三相线损计算
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摘要
针对传统配电网线损计算方法计算精度不高的问题,提出一种新的基于特征量测量的实时三相线损计算方法。首先根据回路电流法的基本原理计算配电网三相线损,并证明该方法也适用于含分布式电源的配电网;然后利用智能计量终端对线损变化的特征量进行测量,将所得特征量作为实时线损计算的输入数据。将基于特征量测量的实时三相线损计算方法应用于东莞含分布式电源的配电网的线损计算中,并与等值电阻法进行比较,结果表明前者的准确度较高。
In allusion to the problem of low calculation precision of traditional calculation method for line loss of the power distribution network,this paper presents a new kind of real-time calculation method for three-phase line loss based on characteristic measurement.This method firstly computes three-phase line loss of the power distribution network according to basic principle of loop current method and proves that the loop current method is also suitable for the power distribution network with distributed generation(DG).Then,it uses intelligent metering terminal to measure characteristic quantity of changes of line loss and takes obtained characteristic quantity as input data for real-time calculation on line loss.This realtime calculation method for three-phase line loss based on characteristic quantity was applied in calculating line loss of Dongguan power distribution network with DG and was compared with equivalent resistance method.Comparison result indicates that accuracy of the former method is comparatively higher.
In allusion to the problem of low calculation precision of traditional calculation method for line loss of the power distribution network,this paper presents a new kind of real-time calculation method for three-phase line loss based on characteristic measurement.This method firstly computes three-phase line loss of the power distribution network according to basic principle of loop current method and proves that the loop current method is also suitable for the power distribution network with distributed generation(DG).Then,it uses intelligent metering terminal to measure characteristic quantity of changes of line loss and takes obtained characteristic quantity as input data for real-time calculation on line loss.This realtime calculation method for three-phase line loss based on characteristic quantity was applied in calculating line loss of Dongguan power distribution network with DG and was compared with equivalent resistance method.Comparison result indicates that accuracy of the former method is comparatively higher.
引文
[1]虞忠年,陈星莺,刘昊.电力网电能损耗[M].北京:中国电力出版社,2002.
[2]广东电网公司.线损理论计算原理与应用[M].北京:中国电力出版社,2009.
[3]LEVITIN G,KALYUZHNY A,SHENKMAN A,et al.Optimal Capacitor Allocation in Distribution Systems Using a Genetic Algorithm and a Fast Energy Loss Computation Technique[J].IEEE Transactions on Power Delivery,2000,15(2):623-628.
[4]DL/T686—1999,电力网电能损耗计算导则[S].
[5]杨丽徙,刘辉,张鸿雁,等.低压电网线损计算中的改进形状系数法[J].电力需求侧管理,2009,11(4):29–32.YANG Lixi,LIU Hui,ZHANG Hongyan,et al.Improved Load Shape Coefficient Method in Low Voltage Line Loss Calculation[J].Power Demand Side Management,2009,11(4):29-32.
[6]付学谦,陈皓勇.平均电流损耗时间法在配网线损计算中的应用[J].电工技术学报,2015,30(12):377–382.FU Xueqian,CHEN Haoyong.Energy Losses Estimation Using Equivalent Time of Average Current Loss Method[J].Transactions of China Electrotechnical Society,2015,30(12):377-382.
[7]陈海涵,程启诚.等值电阻法计算配电网损耗的理论和实践[J].广东电力,2004,17(3):5–8.CHEN Haihan,CHENG Qicheng.Theory and Practice of Distribution Network Loss Calculation Through Method of Equivalent Resistance[J].Guangdong Electric Power,2004,17(3):5-8.
[8]王琨,刘丽平.10 kV线损理论计算方法的误差分析[J].电力学报,2002,17(4):251–253,256.WANG Kun,LIU Liping.Error Analysis on10 kV Line Loss with Theoretical Calculating Method[J].Journal of Electric Power,2002,17(4):251-253,256.
[9]傅志伟,刘会金.考虑负荷曲线和发电出力曲线影响的电力系统网损计算[J].广西电力,2004,27(4):1–3.FU Zhiwei,LIU Huijin.The Calculation for Grid Energy Losses of Electric Power System Considering the Effect by Load Curves and Output Curves from Generators[J].Guangxi Electric Power,2004,27(4):1-3.
[10]CHANG G W,CHU S Y,WANG H L.An Improved Backward/Forward Sweep Load Flow Algorithm for Radial Distribution Systems[J].IEEE Transactions on Power Systems,2007,22(2):882-884.
[11]JU Yuntao,WU Wenchuan,ZHANG Boming.Convergence Problem in Forward/Backward Sweep Power Flow Method Caused by Non-positive-sequence Impedance of Distributed Generators and Its Solution[J].International Journal of Electrical Power and Energy Systems,2015,65(2):463-466.
[12]DE ARAUJO L R,PENIDO D R R,JUNIOR S C,et al.Comparisons Between the Three-phase Current Injection Method and the Forward/Backward Sweep Method[J].International Journal of Electrical Power and Energy Systems,2010,32(7):825-833.
[13]刘庭磊,王韶,张知,等.采用负荷电量计算低压配电台区理论线损的牛拉法[J].电力系统保护与控制,2015,43(19):143–148.LIU Tinglei,WANG Shao,ZHANG Zhi,et al.NewtonRaphson Method for Theoretical Line Loss Calculation of Low-voltage Distribution Transformer District by Using the Load Electrical Energy[J].Power System Protection and Control,2015,43(19):143-148.
[14]熊新华,辛建波,万鹭,等.考虑分布式电源的弱环配电网三相牛拉法潮流算法研究[J].电气应用,2014,33(9):18–23.XIONG Xinhua,XIN Jianbo,WAN Lu,et al.Threephase Power Flow Method for Weakly Meshed Distribution Systems Based on Newton-Raphson Considering Distributed Power[J].Electro Technical Application,2014,33(9):18-23.
[15]孙秋野,陈会敏,杨家农,等.牛顿类潮流计算方法的收敛性分析[J].中国电机工程学报,2014,34(13):2196–2200.SUN Qiuye,CHEN Huimin,YANG Jianong,et al.Analysison Convergence of Newton-like Power Flow Algorithm[J].Proceedings of the CSEE,2014,34(13):2196-2200.
[16]徐青山,刘中泽,杨永标,等.改进的配电网三相潮流计算方法[J].电力系统及其自动化学报,2014,26(9):23–29.XU Qingshan,LIU Zhongze,YANG Yongbiao,et al.Improved Method of Distribution Network Three-phase Power Flow Calculation[J].Proceedings of the CSUEPSA,2014,26(9):23-29.
[17]GHOFRANI-JAHROMI Z,MAHMOODZADEH Z,EHSAN M,et al.Distribution Loss Allocation for Radial Systems Including DGs[J].IEEE Transactions on Power Delivery,2014,29(1):72-80.
[18]CHANG G,CHU S Y,HSU M F,et al.An Efficient Power Flow Algorithm for Weakly Meshed Distribution Systems[J].Electric Power Systems Research,2012,84(1):90-99.
[19]丁雄.10 kV配网合环转供电的若干问题[J].科技风,2014(20):5,18.DING Xiong.Some Problems of the 10 kV Distribution Network Loop Closing Operation[J].Technology Wind,2014(20):5,18.
[20]肖辉耀,高可夫.10 kV配电网合环的分析与应用[J].电气应用,2015,34(11):18–23.XIAO Yaohui,GAO Kefu.Analysis and Application of 10kV Distribution Network Loop Closing[J].Electro Technical Application,2015,34(11):18-23.
[2]广东电网公司.线损理论计算原理与应用[M].北京:中国电力出版社,2009.
[3]LEVITIN G,KALYUZHNY A,SHENKMAN A,et al.Optimal Capacitor Allocation in Distribution Systems Using a Genetic Algorithm and a Fast Energy Loss Computation Technique[J].IEEE Transactions on Power Delivery,2000,15(2):623-628.
[4]DL/T686—1999,电力网电能损耗计算导则[S].
[5]杨丽徙,刘辉,张鸿雁,等.低压电网线损计算中的改进形状系数法[J].电力需求侧管理,2009,11(4):29–32.YANG Lixi,LIU Hui,ZHANG Hongyan,et al.Improved Load Shape Coefficient Method in Low Voltage Line Loss Calculation[J].Power Demand Side Management,2009,11(4):29-32.
[6]付学谦,陈皓勇.平均电流损耗时间法在配网线损计算中的应用[J].电工技术学报,2015,30(12):377–382.FU Xueqian,CHEN Haoyong.Energy Losses Estimation Using Equivalent Time of Average Current Loss Method[J].Transactions of China Electrotechnical Society,2015,30(12):377-382.
[7]陈海涵,程启诚.等值电阻法计算配电网损耗的理论和实践[J].广东电力,2004,17(3):5–8.CHEN Haihan,CHENG Qicheng.Theory and Practice of Distribution Network Loss Calculation Through Method of Equivalent Resistance[J].Guangdong Electric Power,2004,17(3):5-8.
[8]王琨,刘丽平.10 kV线损理论计算方法的误差分析[J].电力学报,2002,17(4):251–253,256.WANG Kun,LIU Liping.Error Analysis on10 kV Line Loss with Theoretical Calculating Method[J].Journal of Electric Power,2002,17(4):251-253,256.
[9]傅志伟,刘会金.考虑负荷曲线和发电出力曲线影响的电力系统网损计算[J].广西电力,2004,27(4):1–3.FU Zhiwei,LIU Huijin.The Calculation for Grid Energy Losses of Electric Power System Considering the Effect by Load Curves and Output Curves from Generators[J].Guangxi Electric Power,2004,27(4):1-3.
[10]CHANG G W,CHU S Y,WANG H L.An Improved Backward/Forward Sweep Load Flow Algorithm for Radial Distribution Systems[J].IEEE Transactions on Power Systems,2007,22(2):882-884.
[11]JU Yuntao,WU Wenchuan,ZHANG Boming.Convergence Problem in Forward/Backward Sweep Power Flow Method Caused by Non-positive-sequence Impedance of Distributed Generators and Its Solution[J].International Journal of Electrical Power and Energy Systems,2015,65(2):463-466.
[12]DE ARAUJO L R,PENIDO D R R,JUNIOR S C,et al.Comparisons Between the Three-phase Current Injection Method and the Forward/Backward Sweep Method[J].International Journal of Electrical Power and Energy Systems,2010,32(7):825-833.
[13]刘庭磊,王韶,张知,等.采用负荷电量计算低压配电台区理论线损的牛拉法[J].电力系统保护与控制,2015,43(19):143–148.LIU Tinglei,WANG Shao,ZHANG Zhi,et al.NewtonRaphson Method for Theoretical Line Loss Calculation of Low-voltage Distribution Transformer District by Using the Load Electrical Energy[J].Power System Protection and Control,2015,43(19):143-148.
[14]熊新华,辛建波,万鹭,等.考虑分布式电源的弱环配电网三相牛拉法潮流算法研究[J].电气应用,2014,33(9):18–23.XIONG Xinhua,XIN Jianbo,WAN Lu,et al.Threephase Power Flow Method for Weakly Meshed Distribution Systems Based on Newton-Raphson Considering Distributed Power[J].Electro Technical Application,2014,33(9):18-23.
[15]孙秋野,陈会敏,杨家农,等.牛顿类潮流计算方法的收敛性分析[J].中国电机工程学报,2014,34(13):2196–2200.SUN Qiuye,CHEN Huimin,YANG Jianong,et al.Analysison Convergence of Newton-like Power Flow Algorithm[J].Proceedings of the CSEE,2014,34(13):2196-2200.
[16]徐青山,刘中泽,杨永标,等.改进的配电网三相潮流计算方法[J].电力系统及其自动化学报,2014,26(9):23–29.XU Qingshan,LIU Zhongze,YANG Yongbiao,et al.Improved Method of Distribution Network Three-phase Power Flow Calculation[J].Proceedings of the CSUEPSA,2014,26(9):23-29.
[17]GHOFRANI-JAHROMI Z,MAHMOODZADEH Z,EHSAN M,et al.Distribution Loss Allocation for Radial Systems Including DGs[J].IEEE Transactions on Power Delivery,2014,29(1):72-80.
[18]CHANG G,CHU S Y,HSU M F,et al.An Efficient Power Flow Algorithm for Weakly Meshed Distribution Systems[J].Electric Power Systems Research,2012,84(1):90-99.
[19]丁雄.10 kV配网合环转供电的若干问题[J].科技风,2014(20):5,18.DING Xiong.Some Problems of the 10 kV Distribution Network Loop Closing Operation[J].Technology Wind,2014(20):5,18.
[20]肖辉耀,高可夫.10 kV配电网合环的分析与应用[J].电气应用,2015,34(11):18–23.XIAO Yaohui,GAO Kefu.Analysis and Application of 10kV Distribution Network Loop Closing[J].Electro Technical Application,2015,34(11):18-23.