含STATCOM的双馈风电场无功协调补偿策略
摘要：双馈异步发电机(DFIG)可以参与系统无功功率的调节,但其无功补偿作用有限,为了实现DFIG的恒功率因数模式运行,仍需要多种无功补偿装置(如FACTS装置、固定电容器)间的无功协调补偿。针对无功补偿装置不同的补偿特性,本文提出了一种含STATCOM的无功协调补偿策略,适用于解决风速波动期间STATCOM和固定电容器对无功的协调补偿问题,其根据并网点电压通过闭环反馈灵活整定风电场所需无功参考值,按照与集电母线的电压差将参考值进行不同母线间的分配,并按照磁滞控制策略进行无功补偿装置之间的协调控制。PSCAD/EMTDC下的算例仿真表明,所提无功协调补偿策略在暂稳态情况下均具有良好的补偿效果。
Abstract:Doubly fed induction generator (DFIG) can be involved in the system reactive power regulation, but the function of reactive power compensation is limited. In order to realize the constant power factor operation mode of DFIG, it still needs coordinated reactive power compensation among multiple reactive power compensation devices (such as fixed capacitors/FACTS devices). According to different compensation characteristics of reactive power compensation devices, a coordinated reactive power compensation strategy with STATCOM is proposed, which is applicable to solve such problem as coordinated reactive power compensation between STATCOM and fixed capacitors during the wind speed fluctuations. The basic theory is that required reactive power reference value of wind farm is set flexibly through the closed loop feedback according to PCC voltage, the reference value of different buses is distributed according to its voltage deviation to bus bar, and the hysteresis control strategy is applied to realize coordination control among reactive power compensation devices. The simulation results in the PSCAD/EMTDC environment show that the proposed coordinated strategy has a good compensation effect both in the transient and steady state conditions.
标题：含STATCOM的双馈风电场无功协调补偿策略
英文标题：Coordinated Reactive Power Compensation Strategy for DFIG Wind Farm with STATCOM
作者：陈鹏伟, 肖湘宁, 杨 洋, 李 璐,
关键词：风电场, STATCOM, 无功, 协调补偿,
发表日期：2016-02-14
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