大规模风电并网无功电压协调控制策略研究  

Study on reactive power and voltage coordinated control strategy for power system with large-scale wind power integration

作　　者：王玉婷 李鹏[3] WANG Yu-ting;LI Peng(Nanjing SAC Power Grid Automation Co.Ltd.,Nanjing 211153,China;Guodian Nanjing Automation Co.Ltd.,Nanjing 210032,China;State Grid Jiangsu Electric Power Company Research Institute,Nanjing 211103,China)

机构地区：[1]南京国电南自电网自动化有限公司,江苏南京211153 [2]国电南京自动化股份有限公司,江苏南京210032 [3]国网江苏省电力公司电力科学研究院,江苏南京211103

出　　处：《电工电能新技术》2019年第3期47-55,共9页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金项目(51707040)

摘　　要：本文开展了大容量、集团式风电场接入输电网的协调电压控制方法研究。针对双馈风电机组(DFIG)的无功电压控制方式,提出了考虑运行约束的风电机组及风电场无功调节能力计算方法,并提出了基于电压控制器和控制任务协调分配的风电场电压控制策略,使风电场相对电网整体表现为可控电压源;进一步,基于危险节点等值模型,选择控制节点和构建风电网系统协调电压控制模型,并通过在线求解简单的优化问题确定控制量;基于此提出了风电场并网的电压协调控制系统方案,使并网DFIG风电场参与电力系统电压控制。基于典型系统的仿真结果表明,该方案能充分利用系统中的电压支撑能力,提高系统的电压稳定性,能适应风电并网系统在线电压协调控制的要求。The coordinated voltage control scheme for power system with large-scale wind farm integration is studied in this paper.Firstly,the reactive power regulation capability of wind turbine and wind farm is calculated by considering the control mode and operation limitation of the double-fed induction generator (DFIG).The voltage control strategy of wind farm based on voltage controller and control order allocation algorithm is proposed,which can present DFIG wind farm as a controllable voltage source to power network.Moreover,a coordinated voltage control model and algorithm for wind power integrated power system is presented,in which the control nodes are decided by the equivalent model of critical node,and the control inputs are obtained by solving a simple optimization problem.Based on this,the implementation of coordinated voltage control scheme for large-scale wind power grid-connected system is constructed to make full use of voltage control capability of DFIG wind farm.Simulations conducted on typical systems demonstrate that the scheme has high performance,which is adapted to on-line voltage stability control.

关 键 词：协调电压控制 风电并网 双馈风电机组 等值模型 

分 类 号：TM715[电气工程—电力系统及自动化]