Large-Signal Stability Criteria in DC Power Grids With Distributed-Controlled Converters and Constant Power Loads
Large-Signal Stability Criteria in DC Power Grids With Distributed-Controlled Converters and Constant Power Loads
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DOI：
10.1109/tsg.2020.2998041
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发表时间：
2020-05
影响因子：
9.6
通讯作者：
Fangyuan Chang;Xiaofan Cui;Mengqi Wang;Wencong Su;A. Huang
中科院分区：
文献类型：
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作者：
Fangyuan Chang;Xiaofan Cui;Mengqi Wang;Wencong Su;A. Huang
电力电子器件的日益普及可能会导致未来电力系统的巨大扰动和不稳定。然而，稳定性标准仍然是一个未解决的难题，因为当发生大扰动（例如故障、脉冲功率负载或负载切换）时，传统的小信号稳定性分析不适用于电力电子支持的电力系统。为了解决这个问题，本文首次提出了采用分布式控制 DC-DC 功率转换器的直流微电网大信号稳定性充分标准的严格推导。设计并考虑了一种新型闭环转换器控制器。此外，这篇论文首次证明了著名且经常被引用的布雷顿-莫泽的混合势理论（发表于1964年）是不完整的。通过案例研究来说明 Brayton-Moser 混合势理论的缺陷并验证所提出的新型稳定性准则的有效性。
The increasing adoption of power electronic devices may lead to large disturbance and destabilization of future power systems. However, stability criteria are still an unsolved puzzle, since traditional small-signal stability analysis is not applicable to power electronics-enabled power systems when a large disturbance occurs, such as a fault, a pulse power load, or load switching. To address this issue, this paper presents for the first time the rigorous derivation of the sufficient criteria for large-signal stability in DC microgrids with distributed-controlled DC-DC power converters. A novel type of closed-loop converter controllers is designed and considered. Moreover, this paper is the first to prove that the well-known and frequently cited Brayton-Moser’s mixed potential theory (published in 1964) is incomplete. Case studies are carried out to illustrate the defects of Brayton-Moser’s mixed potential theory and verify the effectiveness of the proposed novel stability criteria.