A network‐decomposition‐based multi‐rate parallel transient simulation technique for active distribution networks

Abstract

Emerging power sources and load demands penetrating the power system on demand side lead to diversified dynamic processes of distribution networks and thus create challenges for transient simulation of large-scale active distribution networks. This paper proposes a network-decomposition-based multi-rate parallel transient simulation technique for active distribution networks. Prominent advantages of the proposed method are accentuated by balancing computational complexities of CPU cores and devised core-oriented adaptive step sizes in terms of the simulated elements with various dynamic characteristics. First, an optimised decomposition strategy of active distribution networks is proposed with the goals of balancing the computational burden of each core and minimising interactive data between cores. On that basis, coordinating models of multi-port networks and equivalent models of interfaces are established. Then, a parallel simulation method of coordinated adaptive step sizes is proposed to accelerate the transient simulation. Case studies on eight feeders connecting to a common 10-kV bus are carried out to verify the simulation speed and precision of the proposed parallel simulation method.

A Multi-Rate Simulation Strategy Based on the Modified Time-Domain Simulation Method and Multi-Area Data Exchange Method of Power Systems

“…With the large-scale integration of power electronic devices, multi-rate algorithms have developed to the System level [12,13]. In [14], a multi-rate parallel transient simulation technique for large-scale distribution networks is proposed, based on network decomposition. This method employs interface equivalent models and adaptive variable step size techniques to accelerate parallel simulations.…”

A simplified model of Type‐4 wind turbine for short‐circuit currents simulation analysis

“…In order to improve the simulation efficiency of power system connecting with large-scale WPPs, a lot of studies have been carried out. For example, methods of multi-scale simulation of power system connecting with large-scale WPPs are proposed in [23][24][25]. These methods effectively improve the simulation efficiency.…”