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首页> 外文期刊>Power Electronics, IEEE Transactions on >An Enhanced Islanding Microgrid Reactive Power, Imbalance Power, and Harmonic Power Sharing Scheme
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An Enhanced Islanding Microgrid Reactive Power, Imbalance Power, and Harmonic Power Sharing Scheme

机译：增强型孤岛微电网无功，不平衡功率和谐波功率分配方案

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摘要

To address inaccurate power sharing problems in autonomous islanding microgrids, an enhanced droop control method through online virtual impedance adjustment is proposed. First, a term associated with DG reactive power, imbalance power, or harmonic power is added to the conventional real power-frequency droop control. The transient real power variations caused by this term are captured to realize DG series virtual impedance tuning. With the regulation of DG virtual impedance at fundamental positive sequence, fundamental negative sequence, and harmonic frequencies, an accurate power sharing can be realized at the steady state. In order to activate the compensation scheme in multiple DG units in a synchronized manner, a low-bandwidth communication bus is adopted to send the compensation command from a microgrid central controller to DG unit local controllers, without involving any information from DG unit local controllers. The feasibility of the proposed method is verified by simulated and experimental results from a low-power three-phase microgrid prototype.
机译：为了解决自主孤岛微电网中功率分配不准确的问题，提出了一种通过在线虚拟阻抗调整的下降控制方法。首先，将与DG无功功率，不平衡功率或谐波功率相关的术语添加到常规有功-频率下垂控制中。捕获由此引起的瞬态有功功率变化，以实现DG系列虚拟阻抗调整。通过在基本正序，基本负序和谐波频率上调节DG虚拟阻抗，可以在稳态下实现精确的功率共享。为了以同步方式激活多个DG单元中的补偿方案，采用低带宽通信总线将补偿命令从微电网中央控制器发送到DG单元本地控制器，而不涉及DG单元本地控制器的任何信息。通过低功率三相微电网原型的仿真和实验结果验证了该方法的可行性。

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