标题：Coordinated voltage control scheme for VSC-HVDC connected wind power plants
作者：Guo, Yifei; Gao, Houlei; Wu, Qiuwei; Zhao, Haoran; Ostergaard, Jacob
作者机构：[Guo, Yifei; Gao, Houlei; Wu, Qiuwei] Shandong Univ, Sch Elect Engn, Jinan 250061, Shandong, Peoples R China.; [Wu, Qiuwei; Zhao, Haoran; Ostergaard 更多
来源：IET RENEWABLE POWER GENERATION
关键词：wind turbines; wind power plants; voltage control; HVDC power; convertors; HVDC power transmission; voltage-source convertors;; predictive control; power generation control; turbogenerators;; optimisation; sensitivity analysis; coordinated voltage control scheme;; VSC-HVDC connected wind power plants; model predictive control; high; voltage direct current connected wind power plants; voltage regulation; capabilities; wind turbine generators; operation optimisation mode;; corrective mode; system economic operation; bus voltages; power losses;; dynamic Var reserves; WTGs; terminal voltages; sensitivity coefficients;; analytical method; communication time delay; measurement errors
摘要：This study proposes a coordinated voltage control scheme based on model predictive control for voltage source converter (VSC)-based high voltage direct current connected wind power plants. In the proposed scheme, voltage regulation capabilities of VSC and wind turbine generators (WTGs) are fully utilised and optimally coordinated. Two control modes, namely the operation optimisation mode and corrective mode, are designed to coordinate voltage control and economic operation of the system. In the first mode, the control objective includes the bus voltages, power losses and dynamic Var reserves of WTGs. Only the terminal voltages of WTGs are considered in the second mode. The predictive model of the system including VSC and WTGs is developed firstly. The calculation of sensitivity coefficients is done by an analytical method to improve the computational efficiency. Simulation results are presented to demonstrate the effectiveness of the proposed controller and the control performance is compared with conventional optimal control and loss minimisation control. Besides, the robustness of the proposed controller to communication time delay and measurement errors is investigated in the last.