朱晓荣,韩啸.储能电池与常规机组配合参与一次调频的自适应控制策略[J].电测与仪表,2023,60(9):34-42. ZHU Xiaorong,HAN Xiao.The self-adaption control strategy of energy storage battery cooperating with conventional generating units to participate in primary frequency regulation[J].Electrical Measurement & Instrumentation,2023,60(9):34-42.
储能电池与常规机组配合参与一次调频的自适应控制策略
The self-adaption control strategy of energy storage battery cooperating with conventional generating units to participate in primary frequency regulation
In order to give full play to the advantages of battery energy storage system and conventional units in primary frequency regulation, the control strategy of combining droop control and virtual inertia control is adopted for energy storage. In order to avoid the phenomenon of overcharge and overdischarge of energy storage battery, an adaptive control strategy is proposed which considers the output of SOC feedback adjustment. The configuration of energy storage capacity in the power grid is not as good as that of conventional units. A control strategy is designed to timely input and exit the frequency of energy storage, so that the energy storage can be put into the frequency when the frequency changes sharply or the energy storage is out of the primary frequency range of conventional units. When the frequency is basically stable, the energy storage exits the FM steadily to maintain the SOC. Finally, Digsilent/ PowerFactory software is used to simulate the regional power grid"s step load disturbance and continuous load disturbance respectively. The results show that the control strategy can significantly improve the transient frequency characteristics under the step disturbance, and the frequency offset index and SOC can be maintained under the continuous disturbance.
