摘要
为同时实现网侧功率因数、输出电流、共模电压和网侧谐波电流的控制,将其按照一定的权重关系建立了优化目标函数,通过采用预测控制预估未来时刻输入输出量的值,遍取27种矩阵变换器的开关状态,选择使目标优化函数最小的开关状态作为下一个周期的开关管动作。为减少网侧电流谐波,采用虚拟谐波阻尼方法,将网侧电流通过d-q旋转变换和低通滤波得到其谐波分量,再将该谐波分量通过坐标变换转移到矩阵变换器参考输出电流中。对基于预测控制所建立的优化目标函数1和函数2以及虚拟谐波阻尼方法用于两种优化目标函数的可行性进行了仿真验证。仿真结果证明了所提方法是正确可行的。
To simultaneously achieve the control of input power factor and output current and common- voltageand input harmonic current,the optimum target function was built by appropriately selecting the weighting factors. The27 switching states were selected to acquire one state which can make the optimum target function minimum. To reducethe input harmonic current,virtual harmonic damper was used to transform the harmonic current from input side tooutput side,which is realized by using coordinate converter and lowpass filter. The feasibility of the optimum targetfunction one and function two and the virtual harmonic damper with predictive control method achieved was emulated.The emulation results verify the proposed method is right and feasible.
出处
《电气传动》
北大核心
2015年第3期63-67,共5页
Electric Drive
基金
国家自然科学基金(51007094)
关键词
网侧功率因数
共模电压
优化目标函数
虚拟谐波阻尼
网侧谐波电流
预测控制
input power factor
common-voltage
optimum target function
virtual harmonic damper
input harmonic current
predictive control
