Reactive voltage optimization regulation method of distribution network considering the reactive power contribution of a photovoltaic cluster
DOI:DOI: 10.19783/j.cnki.pspc.191537
Key Words:distribution network  reactive power and voltage optimization  distributed photovoltaic  cluster management and control  reactive operation mode  distribution internet of thing
Author NameAffiliation
WANG Wenbin Xingtai Power Supply Branch, State Grid Hebei Electric Power Co., Ltd., Xingtai 054001, China 
JIN Wei Xingtai Power Supply Branch, State Grid Hebei Electric Power Co., Ltd., Xingtai 054001, China 
LI Hongtao Xingtai Power Supply Branch, State Grid Hebei Electric Power Co., Ltd., Xingtai 054001, China 
LI Huibin Xingtai Power Supply Branch, State Grid Hebei Electric Power Co., Ltd., Xingtai 054001, China 
SHI Leilei Xingtai Power Supply Branch, State Grid Hebei Electric Power Co., Ltd., Xingtai 054001, China 
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Abstract:In order to fully tap the reactive power regulation capacity of DG, coordinate the use of various voltage regulation resources of a distribution network, and realize economic and flexible voltage control, this paper integrates all kinds of reactive power control equipment in a medium and high voltage distribution network. It proposes a coordinated operation optimization method of voltage and reactive power control resources in a distribution network considering the contribution of a low voltage photovoltaic reactive power cluster. This method aims at the distributed small capacity off-line photovoltaic power supply at the low-voltage side of the distribution network, puts forward the reactive power management and control strategy of the low-voltage photovoltaic cluster, and designs three kinds of photovoltaic cluster reactive power operation modes, so that it can preset the on-line self-regulation operation according to the mode. In addition, it establishes a distribution network reactive power control resource coordination optimization model, and adopts an optimal division joint optimization method to cut the transformer tap and capacitor bank. Based on the optimization of switching time and switching state, the reactive power operation mode of a photovoltaic cluster and the reactive power output optimization results of other governance equipment are obtained. The forward and backward power flow calculation is nested into the particle swarm optimization algorithm. The simulation results show that the proposed method is reasonable and effective. This work is supported by National Natural Science Foundation of China (No. 51607153) and Science and Technology Project of State Grid Hebei Electric Power Co., Ltd. (No. KJ2018-003).
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