摘要
在新型电力系统中,风电主动参与电网频率调节已成为必然,如何评估风电参与调频对频率动态特性的影响也成为了研究热点。围绕现有的风电调频措施,提出一种可以在额定风速前减少变桨动作次数的恒定减载桨距角的改进风电机组变桨控制,推导出该控制下风电机组参与一次调频的调差系数表达式。基于此构建了含恒定减载桨距角控制的电力系统频率响应模型。推导出频率动态特性指标的解析表达式,揭示了风速、初始桨距角等对风电机组调差系数及频率动态特性的影响机理。通过改进的IEEE三机九节点系统验证了所构建频率等值模型的准确性以及所提调频方法的有效性和可行性。
In the new power system,it is necessary for wind power to actively participate in power grid frequency regulation.How to evaluate the impact of wind power participation in frequency regulation on frequency dynamic characteristics has also become a research hotspot.In this paper,an improved wind turbine pitch control with constant load shedding pitch angle that can reduce the number of pitch actions before the rated wind speed is proposed,and the expression of the difference adjustment coefficient of the wind tur-bine participating in primary frequency regulation under this control is derived.Based on this,the frequency response model of the power system with constant load shedding pitch angle control is constructed,and the analytical expression of the frequency dynamic characteristic index is derived.The influence mechanism of wind speed and initial pitch angle on the adjustment coefficient and frequency dynamic characteristic of the wind turbine is revealed.The accuracy of the frequency equivalent model and the ef-fectiveness and feasibility of the proposed frequency modulation method are verified by the improved IEEE three machine nine-node-system.
作者
安军
孙月云
石岩
周毅博
AN Jun;SUN Yueyun;SHI Yan;ZHOU Yibo(School of Electrical Engineering,Northeast Electric Power University,Jilin Jilin 132012)
出处
《东北电力大学学报》
2024年第3期74-82,共9页
Journal of Northeast Electric Power University
基金
国家自然科学基金重点项目(52337004)。
关键词
变桨控制
恒定减载桨距角
调差系数
频率等值模型
频率动态特性
pitch control
constant load shedding pitch angle
adjustment coefficient
frequency equivalent model
frequency dynamic characteristic
