考虑分布式电源的低压台区线损计算公式修正及线损分析
|
摘要
随着上海松江地区光伏发电的迅速发展,用户数和并网容量大幅增加。传统无源单一配电网络变成了有源双向网络,给配电网线损管理带来新的挑战。通过分析在含有分布式电源配电网络中潮流方向的变化,提出了对传统台区线损计算公式加以修正的方案,解决了传统台区线损计算因供电量中忽略了分布式电源的上网电量而出现线损偏小甚至出现负线损情况,并且通过实际案例分析验证了修正后线损计算公式的合理性以及含有分布式电源的配电网络有助于降低台区线损,但需要注意分布式电源的上网电量消纳问题。
Photovoltaic(PV) generation is developing rapidly in Songjiang District with a significant increase in PV customers and interconnection capacity, which makes the traditional passive distribution network transform into bi-directional active network and also brings new challenges to the line loss management of distribution network. In this paper, by analyzing the change of power flow in the distribution network with distributed generation(DG) interconnection, a modified computational formula of line loss is proposed based on the existent computational formula, which solves the problem that the existent formula often gives lower or even negative results owing to neglecting the grid-connection power of DG. Real examples are calculated and analyzed in this paper and results show that the modified computational formula gives more reasonable results and there is a reduction in line loss of the distribution network with DG integration if the grid-connection power of DG is consumed appropriately.
Photovoltaic(PV) generation is developing rapidly in Songjiang District with a significant increase in PV customers and interconnection capacity, which makes the traditional passive distribution network transform into bi-directional active network and also brings new challenges to the line loss management of distribution network. In this paper, by analyzing the change of power flow in the distribution network with distributed generation(DG) interconnection, a modified computational formula of line loss is proposed based on the existent computational formula, which solves the problem that the existent formula often gives lower or even negative results owing to neglecting the grid-connection power of DG. Real examples are calculated and analyzed in this paper and results show that the modified computational formula gives more reasonable results and there is a reduction in line loss of the distribution network with DG integration if the grid-connection power of DG is consumed appropriately.
引文
[1]丁心海,罗毅芳,刘巍,等.改进配电网线损计算方法的几点建议[J].电力系统自动化,2001,25(13):57-60.DING Xinhai,LUO Yifang,LIU Wei,et al.Proposals on improving the current methods for calculating line losses of distribution network[J].Automation of Electric Power Systems,2001,25(13):57-60.
[2]江卫中,孙志明.供电企业线损理论计算常见问题及对策[J].供用电,2014,31(7):52-54.JIANG Weizhong,SUN Zhiming.Common problems andsolutions of the theoretical calculation of line loss in power supply companies[J.Distribution Utilization,2014(7):52-54.
[3]万善良.城市配电网节能主要途径分析[J].供用电,2008,25(2):5-7,19.WAN Shanliang.Analysis on the major ways of the energy-saving in urban power distribution network[J].Distribution Utilization,2008,25(2):5-7,19.
[4]Atwa Y M,El-Saadany E F,Salama M M A,et al.Optimal Renewable Resources Mix for Distribution SystemEnergy Loss Minimization[J].IEEE Transactions on Power Systems,2010,25(1):360-370.
[5]吴红斌,蔡亮.可再生能源分布式发电系统的经济调度[J].农业工程学报,2010,26(12):287-292.WU Hongbin,CAI Liang.Economic dispatching of renewable energy distribution generation systems[J].Transactions of the Chinese Society of Agricultural Engineering,2010,26(12):287-292.
[6]Hong Yingyi,Pen Kuanlin.Optimal VAR planning considering intermittent wind power using markov model and quantum evolutionary algorithm[J].IEEE Transactions on Power Delivery,2010,25(4):2987-2996.
[7]孟晓芳,朴在林,王英男,等.考虑分布式电源影响的配电网降损分析[J],农业工程学报,2013,29(增1):128-131.MENG Xiaofang,PI AO Zailin,WANG Yingnan,et al.Analysis of distribution network loss considering influence of distributed generation[J].Transactions of the Chinese Society of Agricultural Engineering,2013,29(S1):128-131.
[8]王义贺,栗然,马慧卓,等.10k配电网接人分布式电源后电压及网损的计算与分析[J].东北电力技术,2013(3):4-9.WANG Yihe,LI Ran,MA Huizhuo,et al.Voltage and Network Loss Calculations and Analysis in 10 kV Distri-bution Power System Connecting with Distribution Generations[J].Northeast Electric Power Technology,2013(3):4-9.
[9]雷振,吴琴芳,叶剑烽,等.基于OPENDSS仿真平台的分布式光伏接人对配电网的影响分析[J].供用电,2015,32(9):69-73.LEI Zhen,WU Qinfang,YE Jianfeng,et al.Analysis of the Inlfuence of Distributed Photovoltaic Generation Integration on Distribution Network Based on OPENDSS Simulation Platform[J].Distribution&Utilization,2015,32(9):69-73.
[10]Hong Yingyi,Pen Kuanlin.Optimal VAR planning considering intermittent wind power using markov model and quantum evolutionary algorithm[J].IEEE Transactions on Power Delivery,2010,25(4):2987-2996.
[11]靳利梅.近50年上海地区日照时数的变化特征及影响因素[J].气象科技,2012,40(2):293-298.JIN Limei.Variation Characteristics of Sunshine Duration and Its Influencing Factors in Shanghai in Recent 50Years[J].Meteorological Science and Technology,2012,40(2):293-298.
[12]尹克宁.配电变压器节能的新举措[J],电力设备,2005,6(6):5-7.YIN Kening.The New Move of Energy Saving for Distribution Transformer[J].Electrical Equipment,2005,6(6):5-7.
[13]南泽瑞.干式降压变作为升压变运行的技术[J].电力安全技术,2014(8):21-22.NAN Ruize.The technology of dry step-down transformer as a step-up transformer[J].Electric Safety Technology,2014(8):21-22.
[2]江卫中,孙志明.供电企业线损理论计算常见问题及对策[J].供用电,2014,31(7):52-54.JIANG Weizhong,SUN Zhiming.Common problems andsolutions of the theoretical calculation of line loss in power supply companies[J.Distribution Utilization,2014(7):52-54.
[3]万善良.城市配电网节能主要途径分析[J].供用电,2008,25(2):5-7,19.WAN Shanliang.Analysis on the major ways of the energy-saving in urban power distribution network[J].Distribution Utilization,2008,25(2):5-7,19.
[4]Atwa Y M,El-Saadany E F,Salama M M A,et al.Optimal Renewable Resources Mix for Distribution SystemEnergy Loss Minimization[J].IEEE Transactions on Power Systems,2010,25(1):360-370.
[5]吴红斌,蔡亮.可再生能源分布式发电系统的经济调度[J].农业工程学报,2010,26(12):287-292.WU Hongbin,CAI Liang.Economic dispatching of renewable energy distribution generation systems[J].Transactions of the Chinese Society of Agricultural Engineering,2010,26(12):287-292.
[6]Hong Yingyi,Pen Kuanlin.Optimal VAR planning considering intermittent wind power using markov model and quantum evolutionary algorithm[J].IEEE Transactions on Power Delivery,2010,25(4):2987-2996.
[7]孟晓芳,朴在林,王英男,等.考虑分布式电源影响的配电网降损分析[J],农业工程学报,2013,29(增1):128-131.MENG Xiaofang,PI AO Zailin,WANG Yingnan,et al.Analysis of distribution network loss considering influence of distributed generation[J].Transactions of the Chinese Society of Agricultural Engineering,2013,29(S1):128-131.
[8]王义贺,栗然,马慧卓,等.10k配电网接人分布式电源后电压及网损的计算与分析[J].东北电力技术,2013(3):4-9.WANG Yihe,LI Ran,MA Huizhuo,et al.Voltage and Network Loss Calculations and Analysis in 10 kV Distri-bution Power System Connecting with Distribution Generations[J].Northeast Electric Power Technology,2013(3):4-9.
[9]雷振,吴琴芳,叶剑烽,等.基于OPENDSS仿真平台的分布式光伏接人对配电网的影响分析[J].供用电,2015,32(9):69-73.LEI Zhen,WU Qinfang,YE Jianfeng,et al.Analysis of the Inlfuence of Distributed Photovoltaic Generation Integration on Distribution Network Based on OPENDSS Simulation Platform[J].Distribution&Utilization,2015,32(9):69-73.
[10]Hong Yingyi,Pen Kuanlin.Optimal VAR planning considering intermittent wind power using markov model and quantum evolutionary algorithm[J].IEEE Transactions on Power Delivery,2010,25(4):2987-2996.
[11]靳利梅.近50年上海地区日照时数的变化特征及影响因素[J].气象科技,2012,40(2):293-298.JIN Limei.Variation Characteristics of Sunshine Duration and Its Influencing Factors in Shanghai in Recent 50Years[J].Meteorological Science and Technology,2012,40(2):293-298.
[12]尹克宁.配电变压器节能的新举措[J],电力设备,2005,6(6):5-7.YIN Kening.The New Move of Energy Saving for Distribution Transformer[J].Electrical Equipment,2005,6(6):5-7.
[13]南泽瑞.干式降压变作为升压变运行的技术[J].电力安全技术,2014(8):21-22.NAN Ruize.The technology of dry step-down transformer as a step-up transformer[J].Electric Safety Technology,2014(8):21-22.