无LBC孤岛微电网无功功率精确共享的增强共识分布式控制

Aiting Jiang, Yang Han, Ping Yang, Congling Wang, Jingqi Xiong
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引用次数: 4

摘要

微电网是近年来被广泛应用的一种电网,它可以并网运行,也可以孤岛运行。对于孤岛微电网来说,准确的电力共享是一个重要的任务。在微电网中广泛应用的分层控制可以精确地实现有功功率的共享。但由于线路阻抗不匹配,导致无功分担性能较差。为了准确地实现无功功率的共享,本文提出了一种新的控制策略,即基于增强共识的分布式控制,该策略将共识分布协议和带通滤波器(BPF)引入到典型的分层控制中。该策略引入共识分配协议,自适应调节虚拟阻抗,实现无功准确共享。此外,由于分层控制通常需要低带宽通信,这会降低系统的性能,因此本文采用的BPF不需要任何通信线路和控制回路。最后,仿真结果验证了所提控制策略在孤岛电网无功分担中的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Enhanced Consensus-based Distributed Control for Accurate Reactive Power Sharing of Islanded Microgrids Without LBC lines
Microgrid is widely used in recent years, which can operate in grid-connected mode or islanded mode. For the islanded microgrid, one essential task is the accurate power sharing. With the hierarchical control, which is widely used in the microgrids, the active power sharing can be achieved accurately. However, due to the mismatched line impedances, the performance of the reactive power sharing is poor. In order to share the reactive power accurately, in this paper, a new control strategy, named enhanced consensus-based distributed control, is proposed, which introduces the consensus distribute protocol and the band-pass filter (BPF) into the typical hierarchical control. For the proposed strategy, the consensus distribute protocol is introduced to adaptively regulate the virtual impedance and share the reactive power accurately. Moreover, since the low band-width communication is usually needed in the hierarchical control, which can degrade the performance of the system, the BPF is applied in this paper without any communication lines and any control loops. Finally, simulation results are provided to confirm the validity and effectiveness of the proposed control strategy for the reactive power sharing in islanded MG.
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