摘要
逆变器在新能源发电中起到越来越重要的作用,但是复杂的控制策略及LC(LCL)滤波器的使用产生了严重的谐波问题。本文研究了控制参数对电压控制型逆变器谐波特性的影响,从而为逆变器的谐波抑制提出合理化建议。首先,建立了带有LC滤波器的电压控制型逆变器的戴维南等效模型。在此基础上,通过分析模型中谐波传递函数的数学表达式来研究控制参数对逆变器输出谐波的影响。结果表明,通过选择合适的控制参数,可以提高逆变器的谐波抑制能力。在PSCAD/EMTDC仿真平台上搭建仿真模型,验证了理论的正确性。
Inverters are playing an increasingly important role in new energy power generation.However,complex control strategies and the use of LC(LCL)filters have caused serious harmonic problems.In this paper,the influences of control parameters on the harmonic characteristics of voltage-controlled inverters are studied,and reasonable suggestions are proposed for the harmonic suppression of inverters.First,the Thevenin equivalent model of a voltage-controlled inverter with an LC filter is established.On this basis,the mathematical expression of the harmonic transfer function in the analysis model is analyzed to study the influences of control parameters on the output harmonics of inverters.Results show that the harmonic suppression performance of inverters can be improved by selecting appropriate control parameters.A simulation model is built on the PSCAD/EMTDC simulation platform,which verifies the theoretical analysis.
作者
马春艳
段青
沙广林
潘爱强
赵彩虹
MA Chunyan;DUAN Qing;SHA Guanglin;PAN Aiqiang;ZHAO Caihong(China Electric Power Research Institute,Beijing 100192,China;Electric Power Research Institute,State Grid Shanghai Municipal Electric Power Company,Shanghai 200437,China)
出处
《电力系统及其自动化学报》
CSCD
北大核心
2021年第1期130-135,共6页
Proceedings of the CSU-EPSA
基金
国家电网有限公司总部科技资助项目“高比例直流馈入城市电网谐波传导特征和抑制措施研究资助”。
关键词
谐波
谐振
控制参数
逆变器
harmonic
resonance
control parameter
inverter
