考虑通信延迟的独立微电网并联VSG控制

Distributed consensus control considering communication time delays in isolated microgrid with parallel-connected virtual synchronous generator

分布式一致性控制是实现微电网中分布式电源并联协同运行的重要方式。在实际工程中,分布式一致性控制存在通信延迟,严重影响、制约分布式电源的性能。文章首先介绍了独立微网的运行模式及分布式电源的虚拟同步发电机控制策略,分析了并联虚拟同步发电机的分布式一致性控制架构及其通信延迟问题。提出了考虑通信延迟的并联虚拟同步发电机分布式控制策略,并分析了通信延迟裕度及其关键影响因素。最后,设计了典型通信拓扑和运行工况,仿真验证了所提控制策略的正确性和有效性。

Distributed consensus control is an important means to realize the coordinated operation of multiple distributed generations（DGs）. However, due to the coordination between the various DGs, communication between DGs is necessary but the delay of communication is inevitable in actual system, which seriously affects the performance of distributed control. Therefore, it is necessary to evaluate the effects of communication delay on the consensus control. Firstly, this paper introduces the operation mode of the isolated microgrid and the control strategy of virtual synchronous generator（VSG）. Furthermore, the distributed consensus control architecture and communication delay of the parallel virtual synchronous generator are analyzed. Meanwhile, the consensus control strategy of parallel virtual synchronous generator considering communication delay is proposed. Finally, some typical communication topologies and conditions are designed to verify the correctness and effectiveness of the proposed control strategy.