面向集电系统电压调节的风电场无功电压控制策略  

Collector System Voltage Regulation Oriented Reactive Power Control Strategy for Wind Farm

作　　者：严干贵[1] 孙兆键[1] 穆钢[1] 郑太一 

机构地区：[1]东北电力大学电气工程学院,吉林132012 [2]吉林电网调度中心,长春130021

出　　处：《电工技术学报》2015年第18期140-146,共7页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金重点资助项目(60934005);国家重点基础研究发展计划(973计划)(2013CB228201)资助项目

摘　　要：风能时空分布的差异性导致风电机组运行状态具有分散性,降低了风电场联网运行的安全性。本文提出了一种通过调控风电机组无功输出以改善机组端电压分布的均衡性、进而改善集电系统电压水平的风电场无功电压控制策略,其中各机组无功参考功率是根据电网无功指令,利用集电系统拓扑结构特点,基于网络分析非迭代计算求得。仿真结果表明,所提出控制策略能够改善风电场并网点电压水平,并且机组端电压水平基本一致,增强了风电机组抵御电网电压扰动的能力,提高了风电场联网运行的安全性。Temporal and spatial distribution of wind energy induces the dispersion of operation status of wind generators, which reduces the operation security of wind turbines. In the paper, a new voltage control strategy is presented, which regulates the reactive power output of wind generators to improve the voltage profile of collector system. The reference reactive power of wind turbines is obtained by non-iterative calculation method, based on the characteristics of the collector system topology. The simulation results show that the proposed control strategy could improve the voltage profile of wind farm and reduce the terminal voltage level diversion of wind generators. The ability of wind generators to withstand the grid voltage disturbance is enhanced and the operation security of wind farm is improved.

关 键 词：风电机组 集电系统 并网点电压 无功控制 电压差异 无功储备 

分 类 号：TM614[电气工程—电力系统及自动化]