论文标题
具有任意负载动态的直流微电网的网络拓扑不变稳定性证书
Network Topology Invariant Stability Certificates for DC Microgrids with Arbitrary Load Dynamics
论文作者
论文摘要
DC微电网由于存在严格调节的载荷而容易出现小信号不稳定性。本文开发了一个分散的稳定证书，该证书能够证明包含此类负载的岛上直流网络的小信号稳定性。使用新型的同型方法，提出的标准可确保没有系统本征能能够跨入不稳定的右半平面，以连续范围内的控制器增益水平范围。由此产生的“标准”可以应用于符合指定但非唯一标准的各种网格组件。因此，这些标准朝着提供直流微电网的插件可操作性迈出了一步。在包含Buck和Boost Converter Dynamics的多个DC微电磁盘上明确说明并在数值上进行了明确说明和数值验证。
DC microgrids are prone to small-signal instabilities due to the presence of tightly regulated loads. This paper develops a decentralized stability certificate which is capable of certifying the small-signal stability of an islanded DC network containing such loads. Utilizing a novel homotopy approach, the proposed standards ensure that no system eigenmodes are able to cross into the unstable right half plane for a continuous range of controller gain levels. The resulting "standards" can be applied to variety of grid components which meet the specified, but non-unique, criteria. These standards thus take a step towards offering plug-and-play operability of DC microgrids. The proposed theorems are explicitly illustrated and numerically validated on multiple DC microgrid test-cases containing both buck and boost converter dynamics.
