A network‐decomposition‐based multi‐rate parallel transient simulation technique for active distribution networks. Issue 2 (2nd March 2021)

• Record Type: Journal Article
• Authors: Wang, Zhaoqi; Tang, Wei; Wang, Yue; Zhang, Bo; Cai, Yongxiang; Zhang, Lu; Zhang, Han
• Is Part Of: IET generation, transmission & distribution. Volume 16:Issue 2(2022)
• Page Start: 233
• Page End: 246
• Publication Date: 2021-03-02
• Subjects: Optimisation techniques -- Power system management, operation and economics -- Power system planning and layout -- Distribution networks; Electric power production -- Periodicals; Electric power transmission -- Periodicals; Electric power distribution -- Periodicals; 621.3105
• DOI: 10.1049/gtd2.12158
• Languages: English
• ISSNs: 1751-8687

Abstract

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.