向无源网络供电的MMC-HVDC系统控制与保护策略-Open.PDF

34 3 Vol.34 No.3 Jan.25, 2014 2014 1 25 Proceedings of the CSEE ©2014 Chin.Soc.for Elec.Eng. 405 DOI 10.13334/j.0258-8013.pcsee.2014.03.011 0258-8013 (2014) 03-0405-10 TM 721 MMC-HVDC 1 1 2 2 , (1() 102206 2 102200) Control and Protection Strategies for MMC-HVDC Supplying Passive Networks 1 1 2 2 CAI Xinhong , ZHAO Chengyong , PANG Hui , LIN Chang (1. State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources (North China Electric Power University), Changping District, Beijing 102206, China; 2. State Grid Smart Grid Research Institute, Changping District, Beijing 102200, China) ABSTRACT: This paper investigates the control and protection strategies for modular multilevel converter based (modular multilevel converter based HVDC, MMC-HVDC) HVDC (MMC-HVDC) supplying passive network. Based on the electromagnetic mathematical model of MMC, the MMC Euler-Lagrange (EL) mathematical model in d-q synchronous d-q MMC  reference frame is developed. The passive control law of MMC (Euler-LagrangeEL) MMC is deduced, then the corresponding inner-loop current passive MMC-HVDC controller and constant AC voltage controller for MMC-HVDC