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D-PMU Based Secondary Frequency Control for Islanded Microgrids

机译：基于D-PMU的孤岛微电网二次频率控制

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摘要

This paper proposes a secondary frequency control approach for distributed energy resources (DERs) in networks operating in stand-alone mode; i.e., islanded microgrids. The proposed approach takes advantage of the high resolution, low latency, and time-stamped synchronized measurements of the distribution-level phasor measurement units (D-PMUs) to iteratively adjust the generators contribution, considering the D-PMUs derived active power information, in a way that improves the dynamics of the islanded microgrid frequency regulation. These adjustments are performed using a novel adaptive time-variable droop characteristic capable of significantly speeding-up the secondary frequency regulation, mitigating oscillations, and reducing the frequency nadir. The proposed secondary frequency control can be held after the stabilization of the primary control, as well as simultaneously with the primary frequency regulation. Results show the effectiveness of the proposed approach in significantly improving the frequency regulation of islanded microgrids.
机译：本文提出了一种以独立模式运行的网络中分布式能量资源（DER）的辅助频率控制方法。即孤岛微电网。所提出的方法利用了分布式级相量测量单元（D-PMU）的高分辨率，低延迟和带时间戳的同步测量，从而在考虑到D-PMU导出的有功功率信息的情况下迭代地调整了发电机的贡献。一种改善孤岛微电网频率调节动力学的方法。使用新颖的自适应时变下垂特性执行这些调整，该特性能够显着加快次级频率调节，减轻振荡并降低频率最低点。所建议的次级频率控制可以在初级控制稳定之后保持，也可以与初级频率调节同时保持。结果表明，该方法在显着改善孤岛微电网的频率调节方面是有效的。

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