考虑频率二次跌落的风电机组调频控制研究

盛四清; 占志刚; 吴林林; 王潇; 邓晓洋; 孙大卫

doi:10.19912/j.0254-0096.tynxb.2022-0644

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太阳能学报 ›› 2023, Vol. 44 ›› Issue (8) : 485-491. DOI: 10.19912/j.0254-0096.tynxb.2022-0644

考虑频率二次跌落的风电机组调频控制研究

盛四清¹, 占志刚¹, 吴林林², 王潇², 邓晓洋², 孙大卫²

作者信息 +

RESEARCH ON FREQUENCY REGULATION CONTROL OF WIND TURBINES CONSIDERING SECONDARY FREQUENCY DROP

Sheng Siqing¹, Zhan Zhigang¹, Wu Linlin², Wang Xiao², Deng Xiaoyang², Sun Dawei²

Author information +

文章历史 +

摘要

该文首先分析系统经典响应模型和传统火电机组内部的延时过程,并提出一种考虑协同火电机组的一次调频策略改善系统一次调频效果,其中风电机组配合同步发电机组内部惯性延时过程。为有效利用可用的转子动能储备找到最佳调频系数大小,使用粒子群优化算法（PSO）针对稳定风速情况下的风电机组输出进行优化,满足系统条件限制（例如频率最低点、频率变化率ROCOF等）,决定调频系数K_c值大小和具体退出时间。并利用分段能量降幅信号作用于变流器控制来提升转子转速恢复,从而减小频率二次跌落深度。最后在Matlab/Simulink仿真软件建立的四机两区电网模型中对所提方案进行验证,为新能源参与系统频率调节提供基础。

Abstract

As the penetration rate of new energy wind power increases, the equivalent inertia of the new energy power system gradually decreases, which leads to the deterioration of frequency response. The use of wind turbine rotor kinetic energy for auxiliary frequency regulation has become the current mainstream. The problem of secondary frequency drop is caused, which brings new challenges to the control strategy and exit strategy of the wind turbine converter. To this end, the classical response model of the system and the internal delay process of traditional thermal power units are firstly analyzed, and a primary frequency regulation strategy considering the coordination of thermal power units is proposed to improve the primary frequency regulation effect of the system, in which wind turbine is coupled with inertia delay process of synchronous generator set. In order to effectively use the available rotor kinetic energy reserve to find the optimal frequency regulation coefficient, particle swarm optimization （PSO） is used to optimize the output of the wind turbine under the condition of stable wind speed, and the frequency regulation Kc value size and specific exit time is determined by satisfying the system conditions such as the frequency minimum point, ROCOF, etc. And use the segmented energy drop signal to act on the converter control to improve the rotor speed recovery, thereby reducing the frequency secondary drop depth. Finally, the proposed scheme is verified in the 4-machine 2-zone power grid model established by Matlab/Simulink simulation software, which provides a basis for new energy to participate in the frequency regulation of the system.

导出引用

盛四清, 占志刚, 吴林林, 王潇, 邓晓洋, 孙大卫. 考虑频率二次跌落的风电机组调频控制研究[J]. 太阳能学报. 2023, 44(8): 485-491 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0644

Sheng Siqing, Zhan Zhigang, Wu Linlin, Wang Xiao, Deng Xiaoyang, Sun Dawei. RESEARCH ON FREQUENCY REGULATION CONTROL OF WIND TURBINES CONSIDERING SECONDARY FREQUENCY DROP[J]. Acta Energiae Solaris Sinica. 2023, 44(8): 485-491 https://doi.org/10.19912/j.0254-0096.tynxb.2022-0644

中图分类号： TK513.5

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