基于稀疏时域法的光伏发电机组低频振荡控制研究  

Research on Low Frequency Oscillation Control of Photovoltaic Generator Units Based on Sparse Time Domain Method

作　　者：汤小川 单英健 TANG Xiaochuan;SHAN Yingjian(Yantai Dongfang Energy Technology Co.,Ltd.,Yantai 264000,China)

机构地区：[1]烟台东方能源科技有限公司,山东烟台264000

出　　处：《机械与电子》2025年第1期29-33,共5页Machinery & Electronics

基　　金：烟台东方能源科技有限公司能源管理项目(DFRD-2023-002)。

摘　　要：光伏系统的输出功率受到光照强度、温度等多种因素的影响,表现出强烈的非线性特性,难以实时、准确地获取光伏发电机组低频振荡特性,导致最终控制效果不佳。为此,提出基于稀疏时域法的光伏发电机组低频振荡控制方法。首先,考虑光伏系统的非线性,采用稀疏时域法计算光伏发电机组的低频振荡频率与阻尼比,以此获取低频振荡特性;其次,为克服光伏发电机组的低频振荡对系统稳定性的影响,实现后续有效的低频振荡控制,设计光伏发电机组闭环线性化模型,获得控制目标,并建立了低频振荡控制目标函数;最后,采用萤火虫算法对低频振荡目标函数求解,实现光伏发电机组低频振荡控制。实验结果表明,所提方法可准确分析振荡特性,有效抑制光伏发电机组的低频振荡。Due to the various influence factors such as light intensity and temperature on the output power of photovoltaic systems,it shows strong nonlinear characteristics,making it difficult to accurately reflect the low-frequency oscillation characteristics of photovoltaic power generation units in real time,resulting in poor control performance.Therefore,a low-frequency oscillation control method for photovoltaic power generation units based on sparse time domain method is proposed.Firstly,considering the non-linearity of the photovoltaic system,the sparse time domain method is adopted to calculate the low-frequency oscillation frequency and damping ratio of the photovoltaic generator set,so as to obtain the low-frequency oscillation characteristics;secondly,in order to overcome the impact of low-frequency oscillation of photovoltaic power generation units on system stability and achieve effective low-frequency oscillation control in the future,a closed-loop linearization model of photovoltaic power generation units is designed to obtain control objectives,and a low-frequency oscillation control objective function is established;finally,the firefly algorithm is used to solve the low-frequency oscillation objective function to achieve low-frequency oscillation control of photovoltaic power generation units.The experimental results show that the proposed method can accurately analyze the oscillation characteristics and effectively suppress the low-frequency oscillation of photovoltaic power generation units.

关 键 词：稀疏时域法 光伏发电机组 闭环控制 低频振荡 萤火虫算法 

分 类 号：TM615[电气工程—电力系统及自动化]