考虑网损和电压的多分布式电源最优选址和定容研究

doi:10.11985/2015.09.013

摘要/Abstract

摘要：

分布式电源接入配电网会带来一定好处,如减少配电网网损,提高电压稳定性和带载能力及增强系统可靠性。提出一种对多分布式电源选址和定容的方法,考虑有功网损和电压稳定性两个目标,并将两个目标转化为单一目标,通过求解分布式电源支路电流的有功和无功分量,将分布式电源选址和定容,使配电网有功网损最小,并使系统节点具有良好的电压稳定性;其次,通过Matlab计算目标函数,得到一组DG接入配电网使配电网有功网损最小、电压稳定性最好的节点。最后,利用DIgSILENTPowerFactory对IEEE-33节点和美国PG&E69节点配电网进行验证,仿真结果表明了所提方法的优越性。

关键词: 分布式电源, 配电网, 有功网损, 电压稳定性

Abstract:

Distributed generators have meaningful effect on distribution network, such as powerloss reduction, voltage and load capacity improvement, enhance system reliability and security. This paper proposes a method to calculate the location and size of multi-distributed generatorsby considering two indices: active power losses and voltage stability.The method makes two goals into a single target.By solving the active and reactive component of distributed generators branch current to determine the location and size of distributed generators accessed to the distribution network.The method is to minimizing the network active power loss and enhancing node voltage stability. Then this method throughs Matlab computing and obtains a series of nodes, which make distribution network minimum active power losses, best node voltage stability.Finally, this method use DIgSILENTPowerFactoryof IEEE-33 and US PG & E69 nodes distribution network to verify the simulation results, and simulation results show the superiority of the proposed method.

Key words: Distributed generator, distribution network, active power loss, voltage stability

中图分类号:

TM711

李洪志,杨俊友,崔嘉. 考虑网损和电压的多分布式电源最优选址和定容研究[J]. 电气工程学报, 2015, 10(9): 79-86.

Li Hongzhi,Yang Junyou,Cui Jia. Optimal Location and Sizing of Multi-Distributed Generators Considering Power Loss and Voltage[J]. Journal of Electrical Engineering, 2015, 10(9): 79-86.

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节点组	节点	DG的容量/MV·A	系统有功网损/MW
0			0.16
1	5	1.023-j1.006	0.09
	14	0.725-j0.346
	32	1.068-j0.520
2	17	1.023-j1.006	0.10
	21	0.725-j0.346
	32	1.068-j0.520
3	1	1.023-j1.006	0.11
	19	0.725-j0.346
	22	1.068-j0.520
4	7	1.023-j1.006	0.12
	14	0.725-j0.346
	24	1.068-j0.520
5	2	1.023-j1.006	0.11
	18	0.725-j0.346
	21	1.068-j0.520

不同方法	接入节点	DG有功功率/MW	有功网损减少量(%)
所提方法	5	1.023 0	43.75
	14	0.725 0
	32	1.068 0
GA^[21]	11	1.500 0	39.73
	29	0.422 0
	30	1.071 4
PSO^[22]	8	0.981 6	39.66
	13	0.829 7
	32	1.176 8

节点组	节点	DG的容量/MV·A	系统有功网损/MW
0			0.22
1	20	0.756-j0.562	0.13
	28	0.962-j1.003
	50	0.958-j0.854
	54	0.962-j0.825
	59	1.23-j0.981
2	10	0.756-j0.562	0.14
	23	0.962-j1.003
	31	0.958-j0.854
	54	0.962-j0.825
	69	1.23-j0.981
3	9	0.756-j0.562	0.17
	23	0.962-j1.003
	35	0.958-j0.854
	54	0.962-j0.825
	69	1.23-j0.981
4	10	0.756-j0.562	0.19
	28	0.962-j1.003
	23	0.958-j0.854
	42	0.962-j0.825
	59	1.23-j0.981
5	5	0.756-j0.562	0.18
	27	0.962-j1.003
	35	0.958-j0.854
	47	0.962-j0.825
	65	1.23-j0.981

不同方法	节点	DG有功功率/MW	有功网损减少量(%)
所提方法	20	0.756 0	40.9
	28	0.962 0
	50	0.958 0
	54	0.962 0
	59	1.230 0
GA	21	1.500 0	38.36
	30	0.422 0
	40	1.071 4
	62	0.889 0
	64	0.905 0
PSO	17	0.980 0	38.77
	26	0.829 7
	45	1.176 8
	61	0.790 0
	63	0.990 0