Research on the access location of distributed generations based on distribution network status

doi:10.3969/j.issn.2097-0706.2024.10.004

Abstract

Abstract:

The locating of distributed generators' access points will impact the economic and stable operation of a distribution network. To reduce the impact of distributed wind power's grid connection on network voltage and network loss， a study on locating the generators' access points based on the distribution network status is carried out. Under the premise of ensuring the stable operation of the whole system after the grid connection of distributed wind power， relevant constraint conditions are formulated， and objective functions are established based on indicators including network loss， distribution network voltage deviation and distribution network voltage stability. The objective functions are normalized and weighted，determining the evaluation equation for the power grid operation after the access of distributed wind power. Taking an IEEE 33 node system as an example， the optimal access location can be found by the particle swarm optimization algorithm. Connecting a 600 kW wind generation system to the IEEE 33 node system ， the optimal access point is the node 17. With the access of wind power at this node， the network loss and the voltage deviation of the distribution network is reduced by 38.31% and 42.05%， respectively，and the voltage stability of the distribution network is improved by 18.59%. The proposes decision-making method for the access location of distributed power suppliers can significantly improve the distribution network voltage and network loss by selecting the optimal access location under the constraint of ensuring stable and reliable operation of the distribution network system， providing a new approach for distributed power supply access point locating.

Key words: distributed generation, power flow calculation, particle swarm optimization, network loss, voltage stability, voltage deviation

CLC Number:

TK012：TM926

GUAN Xiaohu, WANG Changyun, ZHANG Yan. Research on the access location of distributed generations based on distribution network status[J]. Integrated Intelligent Energy, 2024, 46(10): 26-31.

Figures/Tables 11

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指标	数值
接入节点位置	17
接入节点容量/kW	600
网损/kW	121.21
电压偏差总和(标幺值)	0.983 7
配电网电压稳定性	0.084 8

接入节点位置	系统综合评分
16	0.548 6
17	0.513 3
30	0.679 2