Open AccessMethod of calculating the maximum transmission capability with unified power flow controller
Author(s) -
Jiankun Liu,
Ningyu Zhang,
Xinyao Zhu,
Ke Xu,
Zhe Chen
Publication year - 2017
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0672
Subject(s) - unified power flow controller , control theory (sociology) , ac power , power flow , correctness , computer science , voltage , grid , maximum power principle , electric power transmission , controller (irrigation) , transmission (telecommunications) , power transmission , electric power system , power (physics) , engineering , mathematics , algorithm , electrical engineering , control (management) , physics , telecommunications , agronomy , geometry , quantum mechanics , artificial intelligence , biology
This study proposed an algorithm for calculating the maximum transmission capacity considering unified power flow controller (UPFC). At the beginning, the equivalent virtual generator, located on ends of UPFC's branch, is obtained based on the source model of UPFC. Then, for the purpose of obtaining the range of transmission power, the maximum (minimum) active/reactive power is treated as an optimising object. Meanwhile, the series voltage and shunt current of the UPFC, as well as other generators’ reactive power, are selected as control variables. As a result, the optimisation model could be formed in UPFC, SSSC and STATCOM modes, respectively, in which buses voltage and transmission limits are also supplied. Based on the characteristics of the above model, the interior point method is used to achieve the optimal solution. In the end, Nanjing western power grid and Suzhou southern power grid are tested to prove the effective and correctness of the introduced algorithm.