1.Grid Planning Research Center,Guangdong Power Grid Corporation,CSG;2.Grid Planning Research Center,Guangdong Power Grid Corporation,CSG;3.Guangdong Power Grid Corporation, CSG, Guangzhou 510080, China
Science and Technology Project of China Southern Power Grid Company Limited (No. 030000QQ00170010)
Proper system partition is the fundamental measure to deal with the blackouts caused by short circuit exceeding limits, complex failures and AC-DC interaction in multiple DC infeed receiving power system like Guangdong. The existing research focuses on the selection of AC line outage, but system partition often needs to strengthen the grid in the area to meet the electrical support constraints. For this purpose, an optimization method of partition and interconnection is proposed which is able to carry out coordinated optimization for the interconnection schemes within and among sections. With this model, reasonable topology and electrical strength are determined to meet the needs of power flow transmission and DC operation support. Firstly, the objective function is defined as minimizing the probability of blackouts at specified scales, and a mathematic model of network structure optimization is put forward considering system security constraints. Secondly, mathematical expression of network structure is developed based on the definition of the minimum unit of the system, with the interconnection schemes among the minimum units as optimization variables. Finally, harmony search algorithm is used to solve the mathematical model. The effectiveness of the proposed method is verified in the application in Guangdong power system
YANG Yan,CHENG Xin,JIN Chu,et al.Optimization Method for Partition and Interconnection of Multi-infeed DC Receiving-end Power System[J/OL].Automation of Electric Power Systems,http://doi.org/10.7500/AEPS20190718010.