Novel correction control approach for an AC/DC hybrid network considering the PQ decoupling property

• Main Authors: Yi Lin, Meng Li, Zhi-Nan Qi, Liu-Qing Qiu, Yong-Hua Zhang
• Format: Article
• Language: English
• Published: Wiley 2019-04-01
• Series: The Journal of Engineering
• Subjects: power system security; HVDC power transmission; power transmission control; load flow control; power grids; HVDC power convertors; power system simulation; hybrid power systems; AC-DC power convertors; voltage-source convertors; optimisation; reactive power control; VSC-HVDC technology; VSC-based high-voltage direct current technology; voltage-source converter-based HVDC technology; correction control approach; optimisation model; reactive power sub-model; active power sub-model; power network; AC/DC hybrid grids; corrective control model; AC/DC hybrid system; power grid; PQ decoupling property; AC/DC hybrid network
• Online Access: https://digital-library.theiet.org/content/journals/10.1049/joe.2018.8602

With the maturity and wide application of the voltage-source converter-based high-voltage direct current (VSC-HVDC) technology in the power grid, the fast-response characteristic of VSC helps to improve the speed of corrective control for the AC/DC hybrid system. This paper presents a corrective control model for AC/DC hybrid grids based on VSC-HVDC. The model is expressed as a typical optimisation model with both the features of the equipment and security constraints of a power network. The corrective control model is dived into an active power sub-model and a reactive power sub-model in order to improve the calculation speed. Case studies of a modified IEEE testing system have been carried out. The results demonstrate the effectiveness of the approach.