摘要
针对光伏并网系统在最大功率点跟踪(maximum power point tracking,MPPT)控制下直流侧电压振荡引起的间谐波电流现象,结合光伏逆变器控制系统特点,建立了单级式光伏并网系统解析模型。分析了直流侧电压振荡到交流侧间谐波电流的传变规律,并通过仿真实验验证了传变规律的准确性。分析了MPPT控制参数和逆变器控制参数对光伏并网系统输出间谐波电流的影响。仿真结果表明MPPT控制参数影响间谐波电流幅值和频率分布,逆变器控制参数在不同频段下对间谐波电流幅值影响不同。
For the phenomenon of inter-harmonic current caused by DC-side voltage oscillation under the control of the grid-connected photovoltaicsystem's maximum power point tracking(MPPT),combined with the characteristics of photovoltaic inverter control system,the analytical model of the single-stage grid-connected photovoltaic system is established.The transmission law from DC-side voltage oscillation to AC-side inter-harmonic current is analyzed,and simulation is used to confirm the correctness of the transmission law.On the inter-harmonic current of the grid-connected photovoltaic system,the impacts of MPPT control parameters and inverter control parameters are examined.According to the simulation results,the MPPT control parameters have an impact on the inter-harmonic current amplitude and frequency distribution,while the inverter control parameters have varying impacts on the inter-harmonic current amplitude at various frequency bands.
作者
钟诚
贾冠华
王户赛
姜志富
ZHONG Cheng;JIA Guanhua;WANG Husai;JIANG Zhifu(Northeast Electric Power University,Jilin 132012,China)
出处
《吉林电力》
2023年第3期7-12,共6页
Jilin Electric Power
基金
国家自然科学基金(52077030)
吉林省自然科学基金(20190201289JC)。
关键词
单级式光伏并网系统
电压振荡
间谐波电流
传变规律
控制参数
single-stage grid-connected photovoltaic system
voltage oscillation
inter-harmonic current
transmission law
control parameters
