Power Flow Calculation Methods for Power Systems with Novel Structure UPFC

Applied Sciences

Zheng Xu¹  Jian Yang¹ 

[1] Department of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;

关键词: flexible AC transmission systems (FACTS);    unified power flow controller (UPFC);    power flow calculation;    Newton–Raphson algorithm;    novel structure;   

DOI  :  10.3390/app10155121

来源: DOAJ

【 摘 要 】

Latest unified power flow controller (UPFC) projects adopt novel device structures to meet the requirements of practical applications. Developing power flow calculation methods for these new UPFC structures is of great significance for the design and operation of related projects. To address this issue, this paper deduces an equivalent model of the general structure UPFC, and presents the modified power mismatch equations and Jacobian matrix of the system. Then, three power flow calculation methods suitable for the novel structure UPFC are proposed based on the Newton–Raphson algorithm. The main difference between the three methods is the processing method of UPFC equivalent power injections and the Jacobian matrix. The characteristics of these methods are compared by case studies. Results demonstrate the effectiveness of the three methods for different UPFC structures, and it is found that the improved method, which considers the impact of the Jacobian matrix modifications in UPFC equivalent power injections, can realize power flow calculation in existing calculation programs, and improve the convergence characteristics.

【 授权许可】

Unknown