Research on Optimal Control of AC-DC Hybrid Distribution Network

2018 3rd International Conference on Energy Materials and Applications

能源学;材料科学

Wu, Zhikai^1 ; Hu, Dalong^1 ; Bai, Jing^1 ; Jiang, Li^1 ; Meng, Ming^2 ; Zhu, Guolin^2 ; Wei, Yi^2

State Grid Liaoning Electric Power Company Limited Economic Research Institute, Shenyang

110015, China^1

North China Electric Power University, Baoding

071003, China^2

关键词: Communication failure;    Control strategies;    Converter station;    Different voltages;    Hierarchical control strategies;    Optimal dispatch;    Power fluctuations;    Voltage fluctuations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/446/1/012015/pdf
DOI  :  10.1088/1757-899X/446/1/012015

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

It is hard to optimize power flow and operating status of hybrid AC/DC distribution network with traditional control strategy, so this paper proposed a hierarchical control strategy with different voltage scales. In the first layer, different converter stations maintain stable operation of power system with different control strategy; In the second layer, when power fluctuations of system are large, converter stations change its operation mode to balance voltage fluctuation of DC side; In the third layer, energy optimal dispatch system calculate different converter stations' control reference to reduce power loss of system. When operation of system change, systems' stable operation is maintained by switching of control strategy in different layer. The simulation using Matlab/Simulink shows that this control strategy can reduce power loss and system can operate stably even in communication failure.