摘要
提出一种具有低谐波失真、高功率因数、快速动态响应的数字PFC系统优化设计方法.从输入导纳的角度分析了影响电流波形失真的主要原因,提出一种在传统PI控制基础上结合前馈补偿的电流内环控制优化算法,减小输入电流谐波失真,提高功率因数;采用PI调节与惯性低通滤波相结合的电压外环控制方法,消除二次谐波影响,同时保证输出电压的快速响应.基于FPGA的实验结果验证了本方法的有效性,实验表明:本设计的功率因数校正电路总谐波失真为6.14%,功率因数可达99.85%.
An optimized digital control scheme for boost power-factor-correction(PFC) with low total-harmonic-distortion(THD) and fast dynamic response was presented.A discussion on the main reasons for the input current distortion was given by the analysis of input admittance,and a simple feed-forward compensation method was proposed to reduce the distortion.A inertia structure was added to the traditional proportion-integral(PI) regulator in order to eliminate the second harmonic effect and maintain a fast response to the output voltage.The experimental result confirms that the design proposed was effective,the power factor correcter shows a good performance:the THD was 6.14%,and the power factor was up to 99.85%.
出处
《华中科技大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2010年第12期36-39,共4页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(61076030)
湖北省自然科学基金资助项目(2009CDB105)
关键词
功率因数校正
数字控制
现场可编程门阵列
前馈补偿
惯性滤波
power-factor-correction digital control FPGA(field-programmable gate aray) feedforward compensation inertial filter