风电场无功电压控制研究  

Research on Reactive Power and Voltage Control for Wind Farm

作　　者：聂宏展[1] 李帅[1] 

机构地区：[1]东北电力大学电气工程学院,吉林吉林132012

出　　处：《沈阳建筑大学学报（自然科学版）》2014年第2期379-384,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：国家自然科学基金项目(60904047)

摘　　要：目的研究双馈感应发电机的无功发生极限,采用一种风场控制策略实现接入点电压达到控制的目标值,以实现风场内的协调控制.方法双馈感应风机机组作为主要无功源,以双馈风机风电系统的功率关系为基础,把并网点电压调节作为目标同时考虑到各机组机端电压的协调控制策略.按照机端电压近似相等的原则来整定各台机组的无功出力,针对所采用的策略应用PSAT仿真软件搭建风场模型并进行了仿真.结果优先控制风电机组进行无功功率调节,降低风电功率波动,仿真结果验证了策略的正确性和有效性.结论充分发挥双馈风机作为风电场的元素组成部分的调压能力,提高风电机组对系统正常电压波动的适应性,并且减少了无功补偿设备的无功输出,实现了快速调节.The reactive power limit of doubly fed induction generator（DFIG）was calculated in this paper. A control strategy that regards the voltage regulator of the grid point as a goal w as proposed. Regarding DFIG as a main source of reactive,in consideration of the pow er relationship in overall system and taking terminal voltage of double-fed w ind turbine into account and according to the principle that the terminal voltage is approximately equal,the reactive pow er output of each unit could be adjusted. Using this control strategy and w ith the help of PSAT,a w ind field model w as built and a simulation w as carried out. Priority control for w ind turbine w as used to control reactive pow er and to reduce w ind pow er fluctuations. Simulation results show that the goal of access point voltage control is achieved and the full play to the voltage regulating ability of DFIG is realized. It is indicated that the proposed control strategy is correct and effective.

关 键 词：风力发电 双馈感应风力发电机 静止无功补偿器 无功补偿 

分 类 号：TP391.2[自动化与计算机技术—计算机应用技术]