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频率是维持微电网在孤岛运行状态下稳定运行的关键因素.需求侧响应技术的快速发展为孤立微电网的频率控制提供了一种新的解决方案.本文以电冰箱为例,提出一种适用于家居型温控负荷的变参与度需求侧分散控制策略,以协同储能系统进行孤立微电网的频率控制.该控制策略可充分发挥温控负荷的快速响应特性,受控冰箱根据当地频率测量信号迅速做出响应决策,动态调整冰箱工作周期,同时通过引入与频率波动幅度成正比的用户参与度,使冰箱在实现微电网频率响应的同时充分计及终端用户的用能舒适度,提高了用户的主动参与性.最后,在DIg SILENT商业软件中搭建了Benchmark低压微电网算例,仿真结果验证了本文变参与度的需求侧分散控制策略提高微电网频率控制效果的有效性,并在保证用户用能舒适度的同时,有效减小对储能装置的容量需求.
Frequency is the key factor to maintain the stable operation of microgrid in islanding operation.The rapid development of demand-side response technology provides a new solution for the frequency control of isolated microgrid.In this paper, The demand-side decentralized control strategy of home-based temperature-control load is adopted to control the frequency of isolated microgrid in coordination with energy storage system.The control strategy can give full play to the rapid response characteristics of temperature-controlled load, and the controlled refrigerator measures according to the local frequency Signal quickly respond to decisions, dynamically adjust the refrigerator cycle, and by introducing frequency fluctuations and is proportional to the degree of user engagement, so that the refrigerator in the micro-grid frequency response at the same time give full consideration to end-user energy comfort, increased User participation.Finally, an example of Benchmark LVSM is built in DIg SILENT commercial software. The simulation results verify the effectiveness of this DSM strategy to improve the frequency control effect of micro-grid, The user can comfortably reduce the capacity requirement of the energy storage device at the same time.