摘要
传统风电场跟随主站电压指令调节的方式容易导致站内无功源频繁波动、站内无功裕度不足,影响风电场的调压能力。为此提出了一种考虑风电运行轨迹与场景划分的场级主动调压优化控制策略。首先,基于风电场功率预测数据和有功–电压灵敏度曲线,绘制并网点电压波动轨迹,结合AVC子站接收到的电压指令,协调风机和SVG的无功输出,有效降低了无功设备的调节频次。其次,根据电压跌落幅度划分详细运行场景,通过调整SVG的控制模式,有效抑制了电网电压的大幅波动。最后,构建了包含AVC功率控制器的仿真测试平台,验证对比了所提方法相对于传统风电场AVC控制策略在降低无功调节频次、提升无功裕度、主动电压支撑方面的效果,为实现风电场主动调压提供了新的解决思路。
The traditional way of regulating wind farm based on the voltage command from the main station often leads to frequent fluctuations of reactive power sources within the station as well as insufficient reactive power margin,which affects the regulation capacity of the wind farm.Therefore,a new active voltage regulation optimization control strategy at field level is proposed considering wind power operation trajectory and scene division.First,based on the power prediction data of the wind farm and the active voltage sensitivity curve,the voltage fluctuation trajectory of the parallel node is drawn.The coordination of reactive power output of the wind turbine and the SVG,in combination with the voltage command received by the AVC substation,effectively reduces the regulation frequency of reactive power equipment.The detailed operation scenarios are further categorized based on the amplitude of the voltage drop,and the effective suppression of large ge-fluctuations of grid voltage is realized by adjusting the control mode of SVG.Finally,a simulation test platform incorporating AVC power controller is constructed to verify the effectiveness of the proposed method in reducing reactive power regulation frequency,enhancing the reactive power margin,and providing active voltage support compared to the traditional AVC control strategy of wind farms.This offers a new solution for realizing active voltage regulation in wind farms.
作者
刘京波
吴林林
李琰
张扬帆
杨霖
郇政林
LIU Jingbo;WU Linlin;LI Yan;ZHANG Yangfan;YANG Lin;HUAN Zhenglin(State Grid Jibei Electric Power Co.,Ltd.Research Institute(North China Electric Power Research Institute Co.,Ltd.),Xicheng District,Beijing 100045,China;Grid-connected Operation and Demonstration Technology for Wind-Solar-Storage Hybrid System State Grid Corporation Laboratory,Xicheng District,Beijing 100045,China)
出处
《现代电力》
北大核心
2024年第4期612-621,共10页
Modern Electric Power
基金
国家电网有限公司总部管理科技项目资助(含构网型机组的新能源场站多源协同主动支撑技术研究及应用(5108-202218280A-2-306-XG))。
关键词
风电场级电压控制
电压波动轨迹预测
无功协调优化
电压支撑能力
电压跌落幅度
field-level voltage control of wind farm
voltage fluctuation trajectory prediction
reactive power coordination optimization
voltage support capability
magnitude of the voltage drop
