Study on the Reactive Power Control in Hybrid DC Asynchronous Interconnection System. (May 2019)

• Record Type: Journal Article
• Authors: Han, Yan; Jia, Yang; Keshan, Che; Hui, Chen; Wenli, Yang; Ke, Liu; Jixiu, Bao
• Is Part Of: IOP conference series. Volume 533(2019)
• Publication Date: 2019-05
• Subjects: Materials science -- Periodicals; 620.1105
• DOI: 10.1088/1757-899X/533/1/012006
• Languages: English
• ISSNs: 1757-8981

Abstract

Abstract: Reactive power control of hybrid DC asynchronous interconnection system has a vital impact on the safety, reliability and high quality of AC/DC power transmission system. The LCC-HVDC unit and MMC-HVDC unit share the same station control system in the hybrid DC asynchronous interconnected system. Firstly, this paper studies the reactive power switching control of LCC-HVDC system, including five subfunctions and control strategies of the reactive power switching control. Secondly, the reactive power auxiliary control of LCC-HVDC system including low load reactive power regulation function and Gamma-Kick function is studied. And the shortcomings of using reactive power auxiliary control are pointed out. Finally, the reactive power control of MMC-HVDC system is deeply studied. The mathematical model of MMC-HVDC control system is established. Reactive power control of MMC-HVDC can be used to replace reactive power auxiliary control of LCC-HVDC to improve the converter utilization and service life