Study on closed loop operation of low voltage distribution network under three-phase unbalanced condition

2017 3rd International Conference on Environmental Science and Material Application

生态环境科学;材料科学

Zhang, Jing^1 ; Jin, Ming^1 ; Cheng, Yunguo^1 ; Wang, Dejun^1 ; Zhou, Kang^1 ; Yan, Xin^2

Yuhang Power Supply Bureau, Hangzhou, China^1

Wuhan University, Wuhan, China^2

关键词: Balance of systems;    Closed-loop operation;    Impulse current;    Load transfer method;    Low voltage distribution network;    Power supply reliability;    Simulation and analysis;    Unbalanced condition;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/108/5/052124/pdf
DOI  :  10.1088/1755-1315/108/5/052124

来源: IOP

【 摘 要 】

The closed loop operation to achieve power load can greatly improve the power supply reliability of low-voltage distribution network, but because of the low voltage distribution network asymmetry and the difference of voltage loop, closed loop operation will not change the balance of system, generating loop impulse current, affect the safe operation of power grid. So this paper considers the low voltage distribution network closed loop current in the load transfer method, and through the simulation and analysis of the distribution network load rate and the unbalance of the loop current and loop distribution after unbalance effect, verify the closed loop operation of distribution network considering the unbalanced degree of necessity.