Open AccessStudy on the stability mechanism of the sending‐side three‐machine‐group system after multiple HVDC commutation failure
Author(s) -
Tu Jingzhe,
Pan Yan,
Zhang Jian,
Jia Junchuan,
Qin Xiaohui,
Yi Jun
Publication year - 2017
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0507
Subject(s) - decoupling (probability) , commutation , control theory (sociology) , electric power system , stability (learning theory) , mechanism (biology) , computer science , power (physics) , engineering , control engineering , electrical engineering , control (management) , physics , artificial intelligence , voltage , quantum mechanics , machine learning
Under the new situation of the ‘strong DC and weak AC’, the interaction between the sending‐side and the receiving‐side AC systems interconnected by HVDC links is becoming significant, and the contingencies can be transmitted via the DC power response. In this study, the rotor motion equation of the three‐machine system is derived. The decoupling of the two stability modes is realised according to their inherent periodic relationship, and the stability mechanism of the sending‐side three‐machine system after multiple HVDC commutation failure is analysed applying the equal‐area criterion. The impact of the influential factors on the stability of the sending‐side system is then analysed. The results are verified by the three‐machine equivalent case system and the ‘North China‐Central China‐East China’ practical system.