Distributed Online Voltage Control for Wind Farms Using Generalized Fast Dual Ascent

作     者：Guo, Yifei Gao, Houlei Wang, Zhaoyu 

作者机构：Iowa State Univ Dept Elect & Comp Engn Ames IA 50011 USA Shandong Univ Minist Educ Key Lab Power Syst Intelligent Dispatch & Control Jinan 250061 Peoples R China 

出 版 物：《IEEE TRANSACTIONS ON POWER SYSTEMS》 (IEEE动力系统汇刊)

年 卷 期：2020年第35卷第6期

页      面：4505-4517页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

基　　金：National Natural Science Foundation of China 

主　　题：Reactive power Wind farms Convergence Voltage measurement Automatic voltage control Wind turbines Dual ascent (DA) distributed control reactive power (VAR) voltage control wind turbine (WT) wind farm 

摘      要：This paper considers the voltage control problem in wind farms, with the goals of maintaining feasible voltage profile and adequate reactive power (VAR) reserves by coordinating the reactive power outputs of wind turbines (WTs) and static synchronous compensators (STATCOMs). Rather than a conventional centralized and offline fashion, we propose a distributed online voltage control scheme based on dual decomposition. First, the optimal voltage control problem is formulated based on the branch flow model. Then, thanks to the sparsity of the constraints in this problem, a distributed solution framework is developed based on the dual decomposition and its online implementation is achieved through voltage feedback. To pursue fast convergence of the distributed algorithm and consequently facilitate the online implementation, the fast gradient method is generalized and then applied to solve the dual problem. The effectiveness of the proposed voltage control scheme is numerically validated under both static and dynamic cases.