Oscillation suppressing control strategy of DC distribution network using battery energy storage system
WANG Li’na1, TAN Liping1, XU Zhiqiang2, LUO Leixin1, LI Yunfeng3
1. Hu’ nan Economy Institute Electric Power Design Co., Ltd, Changsha 410007; ;
2. Hu’ nan Engineering Research Center of Large-Scale Battery Energy Storage Application Technology, Changsha 410007; ;
3. Changsha University of Science and Technology, Changsha 410114
Different from AC distribution network, the oscillation characteristic of DC distribution network is reflected by DC voltage or DC current. It must be presented by the DC voltage if there is an oscillation phenomenon in DC distribution network. In view of the oscillation phenomenon caused by the constant power device connected to the DC distribution network with DC current limiting reactor, this paper first analyzes the mechanism of the oscillation instability of the DC distribution network by using a simplified model. Secondly, by analyzing the bi-directional charging and discharging operation principle of battery energy storage, a strategy of using battery energy storage device to suppress voltage oscillation of DC distribution network is proposed. This strategy is to feed back the DC voltage of the access point to the high pass filter compensator. The compensation voltage produced by the high pass filter compensator is superimposed to the voltage generated by the current loop to form the modulation wave of the power devices. Finally, the electromagnetic transient simulation model is used to verify that the battery energy storage can suppress the DC distribution network oscillation in the dual mode of charging and discharging.
王立娜, 谭丽平, 徐志强, 罗磊鑫, 李云丰. 电池储能抑制直流配电网振荡的控制策略研究[J]. 电气技术, 2022, 23(6): 42-48.
WANG Li’na, TAN Liping, XU Zhiqiang, LUO Leixin, LI Yunfeng. Oscillation suppressing control strategy of DC distribution network using battery energy storage system. Electrical Engineering, 2022, 23(6): 42-48.
2022, Vol. 23 
