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Supplementary mechanisms for smooth transition between control modes in a microgrid

机译:微电网中控制模式之间平滑过渡的补充机制

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Performance requirements and/or operational integrity of a microgrid subject to major changes, e.g., transition from a grid-connected to an islanded condition, transfer switch operation within the microgrid, or control communication failure, can necessitate the controllers (or a subset of them) to change their modes of operation, e.g., P/Q mode to V/f mode. Transfer in the control mode can further exacerbate the transients due to the original disturbance. This paper proposes mechanisms for smooth transition between control modes. Emphasis of the reported work is on control mode change subsequent to (1) grid-connected to islanded condition and (2) control communication failure. The proposed mechanisms are based on (1) an observer (or state estimator) and (2) an auxiliary tracking controller. The effectiveness of the proposed mechanisms are investigated based on digital time-domain studies in the PSCAD/EMTDC environment and verified in an RTDS-based hardware-in-the-loop platform. (C) 2016 Elsevier B.V. All rights reserved.
机译:微电网的性能要求和/或操作完整性会发生重大变化,例如,从并网过渡到孤岛状态,微电网内的转换开关操作或控制通信故障,可能需要控制器(或其一部分) )以将其操作模式(例如,P / Q模式更改为V / f模式)。由于原始干扰,控制模式下的传输会进一步加剧瞬变。本文提出了控制模式之间平滑过渡的机制。报告的工作重点是在(1)电网连接到孤岛状态和(2)控制通信故障之后的控制模式更改。所提出的机制基于(1)观察者(或状态估计器)和(2)辅助跟踪控制器。基于PSCAD / EMTDC环境中的数字时域研究,研究了所提出机制的有效性,并在基于RTDS的硬件在环平台中对其进行了验证。 (C)2016 Elsevier B.V.保留所有权利。

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