摘要
风电机组采用虚拟惯量控制的能量主要来源于转子动能。受风速不确定性以及机组自身状态影响,风电惯量水平难以估计。针对此问题,提出了考虑风速时空分布和机组运行状态差异的有效惯量估计方法。首先,建立风电场风速分布概率模型,利用混合Copula函数在相关性拟合方面的优势,结合尾流效应快速分析相邻机组风速。其次,对不同运行状态以及不同控制参数下的风机虚拟惯量响应过程进行解析。最后,提出了考虑风速时空分布及机组运行状态差异的风电场有效惯量估计方法。根据某风场实际数据构建了风电场惯量响应仿真模型,验证了所提风速相关性模型具备较高的计算效率与准确度;评估得到的有效惯量响应能力能够较真实反映风机的实际响应过程。
The energy controlled by virtual inertia of wind turbine mainly comes from rotor kinetic energy.The inertia level of wind power is difficult to estimate due to the uncertainty of wind speed and the state of the unit itself.In order to solve this problem,an effective inertia estimation method considering the spatio-temporal distribution of wind speed and the operating state of the unit is proposed.First,a wind farm wind speed distribution probability model is established,and the advantages of mixed Copula function in correlation fitting are used to analyze wind speed of adjacent units in combination with wake effect.Secondly,the response process of the fan virtual inertia under different operating conditions and different control parameters is analyzed.Finally,an effective inertia estimation method for wind farm is proposed considering the spatio-temporal distribution of wind speed and the difference of unit operating state.Based on the actual data of a wind field of the State Grid,a simulation model of inertia response of the wind farm is constructed,which verifies that the wind speed correlation model proposed in this paper has high computational efficiency and accuracy.The evaluated effective inertia response ability can reflect the actual response process of the fan.
作者
李东东
张先明
姚寅
徐波
巩伟峥
LI Dongdong;ZHANG Xianming;YAO Yin;XU Bo;GONG Weizheng(College of Electrical Engineering,Shanghai University of Electric Power,Shanghai 200090,China;East China Branch of State Grid Corporation of China,Shanghai 200120,China)
出处
《电力建设》
CSCD
北大核心
2024年第1期112-124,共13页
Electric Power Construction
基金
国家自然科学基金项目(51977128)。
关键词
虚拟惯量
惯量估计
风速相关性
混合Copula函数
超速减载
virtual inertia
inertia estimation
wind speed correlation
mixed Copula function
overspeed load shedding
