Fault Models of Inverter-Interfaced Distributed Generators Within a Low-Voltage Microgrid

作者：Wenming Guo, Longhua Mu, Xin Zhang · 发表于：IEEE Transactions on Power Delivery · 年份：2016 · DOI：10.1109/tpwrd.2016.2541344 · 被引用次数：84 · 研究领域：Microgrid Control and Optimization、Islanding Detection in Power Systems、Power Systems Fault Detection

The traditional overcurrent protection is not suitable for the microgrid. One of the main reasons is that the fault response of the inverter-interfaced distributed generator (IIDG) is very different from that of the rotational generator. This paper develops fault models of IIDGs within a low-voltage microgrid, including active/reactive power (PQ)-controlled IIDGs and voltage-controlled IIDGs. Considering that the control strategy of the PQ-controlled IIDG varies, this paper introduces adjustable parameters into the model to reflect its fault characteristics as comprehensive as possible. Voltage-controlled IIDG is of great significance on maintaining a stable microgrid. The model of voltage-controlled IIDG proposed in this paper keeps its voltage-source nature while accomplishing current limiting. The performance of the proposed IIDG fault models has been tested by Matlab simulations. The achievements of this paper are expected to have a positive impact on the development of microgrid fault analysis and protection.