基于DFIG可用无功裕度的风电场无功电压控制方法  

A control strategy for reactive power and voltage of wind farm based on DFIG reactive power compensation ability

作　　者：崔杨[1] 彭龙[1] 仲悟之[2] 尹佳楠 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012 [2]中国电力科学研究院,北京100192

出　　处：《电测与仪表》2016年第2期15-20,共6页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金项目(51207018);吉林省科技发展计划项目(20130522174JH)

摘　　要：本文提出一种新型双馈风电场无功电压控制方法,旨在满足风电场并网点电压要求的同时能够减少各机组机端电压的差异,以提高机组联网运行能力。该方法考虑了风电场的有功电压特性与双馈型风机的无功调控裕度,通过实时监测风电场升压站高压侧母线电压偏差能较准确地计算风电场无功需求;建立了以降低各机组机端电压差异为目标的无功控制模型,并利用遗传算法确定各机组无功输出分配方案。仿真算例验证了该方法能有效降低各机组机端电压差异,使并网点电压满足电网运行指标。In order to meet the requirement on voltage of wind farm PCC, as well as reduce the voltage difference at each wind generator end, a control strategy for reactive power that applying genetic algorithm is given in this paper. In time-scale, this strategy calculates reactive power demand of wind farm by monitoring the voltage of PCC, while considering the PV characteristics of wind farm and the reactive power ability of DFIG. In space-size, this strategy deter mines allocation scheme of each DFIG using genetic algorithm. Simulation shows that the proposed strategy can effectively reduce the voltage difference of each DFIG terminal, while keep the PCC voltage tracking of grid requirement.

关 键 词：风电场 无功电压控制 双馈风机 遗传算法 

分 类 号：TM761.1[电气工程—电力系统及自动化]