Transmission Line Decoupling Based Parallel Simulation Method of an Active Distribution Network

Now that a large number of Distributed generations (DGs) and nonlinear loads are included in the distribution network, the current active distribution network gradually presents the characteristics of multiple time scales and wide-ranging frequency domain, which undoubtedly increases the complexity of electromagnetic transient (EMT) simulation. Because of this, to improve the efficiency of electromagnetic transient simulation in the condition, this study proposes a network decoupling method that can be suitable for parallel simulation of distribution networks. According to the characteristics of distributed parameter transmission lines, the study introduces a linear interpolation algorithm into the traditional Bergeron model to match the requirements of short-distance line simulation in distribution networks. In addition, applying the improved model to the decoupling of distribution networks, a novel parallel simulation interface of distribution networks is designed and established, and a multi-area decoupling simulation of the distribution network was realized. Finally, the proposed decoupling method is turn out to be more accurate and efficient than the traditional method and more suitable for parallel computing of distribution networks by a simulation example of IEEE13 Node Test Feeders.