摘要
针对目前仿真分析中风电场等值建模这一难题,在考虑风向及电网功率需求对风电场功率输出影响基础上,提出了一种考虑有向功率特性的风电场等值功率输出模型构建方法。该方法首先根据风向将风电场的实际运行数据划分到不同的风向扇区内,利用数学统计方法分析不同风向下输入风速与输出功率之间的映射关系,得到不同风向扇区的风电场功率曲线的函数关系表征,建立了风电场有向功率曲线;然后,根据电网的功率需求,控制风电场的并网输出功率,构建了风电场功率输出模型,并利用风电场实例进行仿真验证。算例分析表明,所搭建的风电场模型能够合理地表征风电场输出功率,更准确地反映风电场的实际运行特性,可为风电场运行分析及并网研究提供参考。
In order to improve conventional wind farm model in power grid simulation, a novel approach is proposed in this paper. An equivalent model of power output in a wind farm is built based on directional power characteristics, considering wind direction influence and grid demand on wind farm power output. Firstly, actual operating data of wind farms are divided into different wind direction sectors. For each sector, mapping relationship between input wind speed and output power is statistically analyzed to obtain corresponding power curve of a wind farm, constituting directional power curves of wind farm. Then, power output model of a wind farm is built, for which grid-connected wind farm output is controlled according to the directional power curves and system demand response. The power output model is verified in ATP/EMTP software package. Results show that the proposed equivalent model can represent power output reasonably and reflect operating characteristics of wind farm more accurately. It can be used to analyze system integration of wind farms.
出处
《电网技术》
EI
CSCD
北大核心
2016年第12期3775-3782,共8页
Power System Technology
基金
国家自然科学基金项目(51677188
51477174)
国家电网公司科技项目(SGTYHT/15-JS-191
DZB51201503568)~~
关键词
风电场
实际运行数据
风向
有向功率曲线
风向扇区
功率输出模型
wind farm
actual operating data
wind direction
directional power curves
wind speed sector
power output model
