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Agent-based Distributed Unbalance Compensation for Optimal Power Quality in Islanded Microgrids

机译:基于agent的分布式不平衡补偿在孤岛微电网中的最优电能质量

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摘要

In microgrids, the distributed generators (DG) can be used as distributed compensators so as to compensate the voltage unbalances in the critical bus. However, the power quality disturbance in generator sides and local buses may be affected and exceeds the limit. It can be more convenient to implement tertiary control so as to adjust the compensation efforts among DGs and ensure the acceptable power quality in local buses. Moreover, as centralized control methods have certain disadvantages, such as low flexibility, expandability and heavy computation burden, this paper proposes an agent-based distributed hierarchical control method. Communication links are required between neighboring units. Consensus algorithm and optimization algorithm are implemented in tertiary control for global information discovery and local optimal decision-making respectively. The tertiary control gives lower level controller a tertiary compensation gain to adjust the local DG compensation effort so as to ensure the acceptable power quality in the local bus while keeping the best power quality in critical bus. Simulation results are shown to demonstrate the effectiveness of the method.
机译:在微电网中,分布式发电机(DG)可用作分布式补偿器,以补偿关键母线上的电压不平衡。但是,发电机侧和本地母线的电能质量扰动可能会受到影响并超过限制。实施第三级控制可以更方便,以便调整分布式发电设备之间的补偿力度,并确保本地总线的电能质量可接受。此外,由于集中控制方法具有灵活性低,可扩展性强,计算量大等缺点,因此提出了一种基于智能体的分布式分层控制方法。相邻单元之间需要通信链接。在三级控制中分别实现共识算法和优化算法,以实现全局信息发现和局部最优决策。第三级控制为较低级别的控制器提供第三级补偿增益,以调整本地DG补偿工作量,以确保本地总线中可接受的电能质量,同时保持关键总线中的最佳电能质量。仿真结果表明了该方法的有效性。

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