Optimal Location and Sizing of Multi-Distributed Generators Considering Power Loss and Voltage

doi:10.11985/2015.09.013

Abstract

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

CLC Number:

TM711

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.

Figures/Tables 11

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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