Open AccessStudy on the method of fault set for AC/DC system operation considering wind power
Author(s) -
Han Hualing,
Huang Ting,
Qian Shuangqiu,
Xu Xiaoyi,
Chen Ning,
Zhao Dawei
Publication year - 2019
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2018.8761
Subject(s) - fault (geology) , overvoltage , transient (computer programming) , electric power system , wind power , maximum power transfer theorem , power (physics) , control theory (sociology) , computer science , engineering , electrical engineering , voltage , physics , control (management) , quantum mechanics , artificial intelligence , seismology , geology , operating system
With the rapid development of power system, wind power becomes an important generating way in AC/DC hybrid power grid. Due to the interference between the wind power and the AC network, the risk of DC system continuous commutation failure will be affected. In order to evaluate this effect reasonably, a method for running out of the fault set is presented in this study. Firstly, a distribution factor is proposed to determine the power line transfer after wind power or power line fault, the line with maximum load rate is chosen as the candidate failure lines; Secondly, the η short‐circuit ratio and η effective short‐circuit ratio indexes of the DC system is evaluated after every fault; they are used to judge whether the cascading fault of AC system induces the transient overvoltage of the converter bus to lead to wind turbines to take off the power grid net. Thus, a cascading fault sequence of the AC system is formed, and a cascading fault set that causes the transient overvoltage of the converter bus is completed. Finally, the simulation results calculated by power system department‐bonneville power administration show that when the commutation failure occurs in the DC system, the system runs out immediately, and the validity of the method is verified.