Droop-Based Distributed Cooperative Control for Microgrids With Time-Varying Delays
Droop-Based Distributed Cooperative Control for Microgrids With Time-Varying Delays
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DOI：
10.1109/tsg.2016.2557813
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发表时间：
2016-04
影响因子：
9.6
通讯作者：
Jingang Lai;Hong Zhou;Xiaoqing Lu;Xinghuo Yu;Wenshan Hu
中科院分区：
文献类型：
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作者：
Jingang Lai;Hong Zhou;Xiaoqing Lu;Xinghuo Yu;Wenshan Hu
针对具有非均匀时变时延的交换通信网络，提出了一种基于Droop的微电网分布式协调控制方案。首先设计了一种包含分布式电压观测器的钉扎频率/电压控制器，然后设计了一种基于共识的有功/无功控制器，并将其应用于二次控制阶段，为不同的分布式发电机(DG)产生一次控制阶段的标称设定值。通过这种方法，可以将所有分布式电源电压的频率和加权平均值固定在期望的值，同时保持精确的有功功率和无功功率分配。在该方案中，每个分布式电源只需要间歇地与邻居通信，即使它们的通信网络是本地的和时变的，并且它们的变化时延可能是不均匀的。给出了保证微电网稳定可靠的网络连通性要求和时延上限的充分条件。通过对微电网测试系统的仿真，验证了该控制方案的有效性。
This paper develops a droop-based distributed cooperative control scheme for microgrids under a switching communication network with non-uniform time-varying delays. We first design a pinning-based frequency/voltage controller containing a distributed voltage observer and then design a consensus-based active/reactive power controller, which are employed into the secondary control stage to generate the nominal set points used in the primary control stage for different distributed generators (DGs). By this approach, the frequencies and the weighted average value of all DGs’ voltages can be pinned to the desired values while maintaining the precise active and reactive power sharing. With the proposed scheme, each DG only needs to communicate with its neighbors intermittently, even if their communication networks are local and time-varying, and their variant delays may be non-uniform. Sufficient conditions on the requirements for the network connectivity and the delay upper bound that guarantee the stability and reliability of the microgrid are presented. The effectiveness of the proposed control scheme is verified by the simulation of a microgrid test system.