计及三相不平衡的配电网损耗计算分析
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摘要
三相不平衡是配电网普遍存在的问题,针对三相不平衡下配电网损耗计算困难的现状,文中提出了一种计及配电网三相不平衡的改进等值电阻法,将该改进方法应用于配电网实例损耗计算,通过与传统配电网损耗计算方法的对比分析验证了该方法的有效性和准确性。为分析三相不平衡程度对配电网损耗的影响程度,对不同程度三相不平衡下的配电网损耗进行计算分析,获得了三相不平衡度与配电网损耗之间的规律。该方法可为三相不平衡下配电网损耗的分析及配电网的优化运行提供有效的参考和指导。
Three-phase unbalance is a common problem in the distribution network,in view of the difficulty in calculation of distribution network loss in distribution network under three-phase unbalance,an improved equivalent resistance method considering the three-phase unbalance of distribution network is presented in this paper. The improved method is applied to the calculation of actual loss in distribution network. The validity and accuracy of this method are verified by comparing with the traditional calculation method. To analyze the influence of three-phase unbalance on the loss of distribution network,the loss of distribution network under different degree of three-phase unbalance is calculated and analyzed,the regularity between three-phase unbalance degree and distribution network loss is obtained. The method in this paper can provide effective reference and guidance for the analysis of distribution network loss and optimization the operation under three-phase unbalance.
Three-phase unbalance is a common problem in the distribution network,in view of the difficulty in calculation of distribution network loss in distribution network under three-phase unbalance,an improved equivalent resistance method considering the three-phase unbalance of distribution network is presented in this paper. The improved method is applied to the calculation of actual loss in distribution network. The validity and accuracy of this method are verified by comparing with the traditional calculation method. To analyze the influence of three-phase unbalance on the loss of distribution network,the loss of distribution network under different degree of three-phase unbalance is calculated and analyzed,the regularity between three-phase unbalance degree and distribution network loss is obtained. The method in this paper can provide effective reference and guidance for the analysis of distribution network loss and optimization the operation under three-phase unbalance.
引文
[1]王代弟.配电网三相不平衡问题的分析与研究[D].沈阳:沈阳工业大学,2007.
[2]Bina M T,Kashefi A.Three-phase unbalance of distribution systems:complementary analysis and experimental case study[J].International Journal of Electrical Power&Energy Systems,2011,33(4):817-826.
[3]张力.配电网理论线损计算分析与研究[D].兰州:兰州理工大学,2013.
[4]Liu X H,Ma L,Shi Y S,et al.Improved equivalent resistance method for low-voltage distribution line loss calculation[J].Advanced Materials Research,2014,3383(1008):417-420.
[5]张有玉,郭珂,周林,等.三相三线制系统电压不平衡度计算方法[J].电网技术,2010,34(7):123-128.
[6]胡应宏,王建赜,任佳佳,等.不平衡负载的平衡分量法分解及补偿方法[J].中国电机工程学报,2012,32(34):98-104.
[7]郭峰,姚莉娜,刘恒,等.引入三相不平衡度的低压电网理论线损计算[J].电力自动化设备,2007,27(11):51-54.
[8]管霖,邱生敏.配电网规划网架的线损理论评估方法[J].电力自动化设备,2011,31(7):17-20.
[9]周虎,陈佳黎,鲜龙,等.电网三相不平衡下农网低电压治理的研究[J].电网与清洁能源,2015,31(11):13-18.
[10]杨云龙,王凤清.配电变压器三相不平衡运行带来的附加损耗、电压偏差及补偿方法[J].电网技术,2004,28(8):73-76.
[11]闫志强,雷霞,何建平,等.三相不平衡对配电变压器带负载能力的影响研究[J].电测与仪表,2018,55(8):51-57.
[12]王彬宇.城市中低压配电网损耗分析与降损技术选择方法[D].重庆:重庆大学,2014.
[13]张占龙,郭民怪,叶云霞,等.配电变压器零序电流治理优化方法及装置[J].电工技术学报,2015,30(10):44-51.
[14]Pasdar A,Mehne H H.Intelligent three-phase current balancing technique for single-phase load based on smart metering[J].International Journal of Electrical Power&Energy Systems,2011,33(3):693-698.
[15]杨文锋,王彬宇,程卓,等.城市中低压配电网降损规划决策方法[J].电网技术,2014,38(9):2598-2604.
[2]Bina M T,Kashefi A.Three-phase unbalance of distribution systems:complementary analysis and experimental case study[J].International Journal of Electrical Power&Energy Systems,2011,33(4):817-826.
[3]张力.配电网理论线损计算分析与研究[D].兰州:兰州理工大学,2013.
[4]Liu X H,Ma L,Shi Y S,et al.Improved equivalent resistance method for low-voltage distribution line loss calculation[J].Advanced Materials Research,2014,3383(1008):417-420.
[5]张有玉,郭珂,周林,等.三相三线制系统电压不平衡度计算方法[J].电网技术,2010,34(7):123-128.
[6]胡应宏,王建赜,任佳佳,等.不平衡负载的平衡分量法分解及补偿方法[J].中国电机工程学报,2012,32(34):98-104.
[7]郭峰,姚莉娜,刘恒,等.引入三相不平衡度的低压电网理论线损计算[J].电力自动化设备,2007,27(11):51-54.
[8]管霖,邱生敏.配电网规划网架的线损理论评估方法[J].电力自动化设备,2011,31(7):17-20.
[9]周虎,陈佳黎,鲜龙,等.电网三相不平衡下农网低电压治理的研究[J].电网与清洁能源,2015,31(11):13-18.
[10]杨云龙,王凤清.配电变压器三相不平衡运行带来的附加损耗、电压偏差及补偿方法[J].电网技术,2004,28(8):73-76.
[11]闫志强,雷霞,何建平,等.三相不平衡对配电变压器带负载能力的影响研究[J].电测与仪表,2018,55(8):51-57.
[12]王彬宇.城市中低压配电网损耗分析与降损技术选择方法[D].重庆:重庆大学,2014.
[13]张占龙,郭民怪,叶云霞,等.配电变压器零序电流治理优化方法及装置[J].电工技术学报,2015,30(10):44-51.
[14]Pasdar A,Mehne H H.Intelligent three-phase current balancing technique for single-phase load based on smart metering[J].International Journal of Electrical Power&Energy Systems,2011,33(3):693-698.
[15]杨文锋,王彬宇,程卓,等.城市中低压配电网降损规划决策方法[J].电网技术,2014,38(9):2598-2604.