Abstract
In view of the overvoltage problem of an ultra-high-voltage DC (UHVDC) AC/DC hybrid system, this study analyses the overvoltage condition under various fault types and gives the identification criterion of the overvoltage form. Firstly, the model of the ± 800 kV UHVDC and 1000 kV UHV AC hybrid system was established in Simulink. The relevant parameters of current and voltage in the hybrid system were simulated and analysed to verify the accuracy and effectiveness of the model. Secondly, the fault simulation of the two system models of AC and DC, respectively, is carried out, and the theoretical analysis of the internal overvoltage caused by the fault is made. Finally, the simulation of the overvoltage condition of the hybrid system under two conditions is carried out, and the waveforms of the important parameters of the AC system and the DC system are obtained. The waveform of each parameter is analysed and the conclusion is obtained. The type of the overvoltage fault of the UHV AC/DC hybrid system is analysed, which provides the basis for fault type judgement.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
