一种改进的电流跟踪控制数字实现方法
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摘要
在分析峰值电流斩波控制器的基础上,提出一种根据设定斩波周期和前一斩波周期占空比来计算当前斩波周期开关时间的方法;通过对电流增大时间和减小时间的控制实现电流平均值等于参考值,将电流进行分段处理,利用缺省计算时间代替正负跳变时出现的计算时间误差,抑制启动和参数跳变时的误差,修正考虑电阻时的电流增大和减小时的开关管导通时间关系,给出电流断续时的平均电流和电流的临界连续值的数学关系。仿真结果表明,提出的电流控制方法正确且有效。
Based on the analysis of peak current chopping regulator,an improved calculation chopping period algorithm was proposed according to the set chopping period and former real chopping period duty cycle. By recombining of the rising time and falling time,and subsection process of current,the current mean value was realized to be equal to reference value. The curreat was dealed with by stages,and the default calculation time was used to eliminate the error of calculation time in alternately occurrence. The method inhibited the error of controller at start-up and parameter variation. At the meantime,the duty cycle relationship of switch was revised with consideration of resistor. The mathematic relationship expression was deduced for the mean value and the continuous threshold level of current considering the discontinuous conduction. The simulation results indicate that the proposed current control method is correct and effective.
Based on the analysis of peak current chopping regulator,an improved calculation chopping period algorithm was proposed according to the set chopping period and former real chopping period duty cycle. By recombining of the rising time and falling time,and subsection process of current,the current mean value was realized to be equal to reference value. The curreat was dealed with by stages,and the default calculation time was used to eliminate the error of calculation time in alternately occurrence. The method inhibited the error of controller at start-up and parameter variation. At the meantime,the duty cycle relationship of switch was revised with consideration of resistor. The mathematic relationship expression was deduced for the mean value and the continuous threshold level of current considering the discontinuous conduction. The simulation results indicate that the proposed current control method is correct and effective.
引文
[1]谭甜源,姜齐荣,李刚,等.基于电流跟踪控制的三电平DSTATCOM装置的控制方法[J].电力系统自动化,2007,31(4):61-65.
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[4]曹武,刘康礼,江楠,等.有源滤波过采样数字滞环电流跟踪控制方法[J].电力系统自动化,2014,38(6):85-90.
[5]尹春杰,张承慧,陈阿莲,等.基于瞬时电流直接控制的有源电力滤波器电流跟踪新方法[J].电工技术学报,2012,27(4):117-122.
[6]曹武,刘康礼,江楠,等.有源滤波过采样数字滞环电流跟踪控制方法[J].电力系统自动化,2014,38(6):85-90.
[7]王实,王群京,漆星,等.四桥臂APF电流跟踪控制方法研究[J].电子测量与仪器学报,2013,27(12):1162-1169.
[8]徐海珍,张兴,刘芳,等.基于超前滞后环节虚拟惯性的VSG控制策略[J].中国电机工程学报,2016,36(18):1-9.
[9]王磊,郭瑞,荣德生,等.微电网磁耦合双向直流变换器控制策略[J].电力电子技术,2016,50(8):1-4.
[10]许小彦,杨才建,MINDYKOWSKI J.有源滤波器空间矢量脉宽调制电流跟踪算法的优化[J].电力系统自动化,2012,36(4):80-84.
[11]于槟华,龚仁喜,郭柏佑,等.一种改进的有源滤波器电流跟踪控制策略[J].电测与仪表,2015,52(24):74-79.
[12]姜卫东,汪磊,马炜程,等.一种电流跟踪误差补偿的三相有源电力滤波器的无差拍控制方法[J].中国电机工程学报,2016,36(20):5605-5615.
[13]蔡斌军,朱建林.光伏并网逆变器的自抗扰电流跟踪控制[J].电力自动化设备,2012,32(3):104-108.
[14]陈增禄,任记达,毛惠丰,等.新型双重Δ调制电流跟踪控制方法的研究[J].电网技术,2005,29(12):62-65.
[15]申张亮,郑建勇,梅军,等.基于改进电压空间矢量调制的有源滤波器双滞环电流跟踪控制策略[J].中国电机工程学报,2011,31(15):8-14.
[16]吴敬兵,罗安,杨晓峰,等.一种基于延时补偿的电流跟踪控制新方法[J].电工技术学报,2012,27(4):123-130.
[2]周柯,罗安,唐杰,等.有源滤波器电流跟踪控制的一种新方法[J].电力系统自动化,2006,30(1):60-64.
[3]刘健,程红丽,王立,等.电流跟踪数字控制的Buck DC-DC变换器[J].电工技术学报,2011,26(8):50-56.
[4]曹武,刘康礼,江楠,等.有源滤波过采样数字滞环电流跟踪控制方法[J].电力系统自动化,2014,38(6):85-90.
[5]尹春杰,张承慧,陈阿莲,等.基于瞬时电流直接控制的有源电力滤波器电流跟踪新方法[J].电工技术学报,2012,27(4):117-122.
[6]曹武,刘康礼,江楠,等.有源滤波过采样数字滞环电流跟踪控制方法[J].电力系统自动化,2014,38(6):85-90.
[7]王实,王群京,漆星,等.四桥臂APF电流跟踪控制方法研究[J].电子测量与仪器学报,2013,27(12):1162-1169.
[8]徐海珍,张兴,刘芳,等.基于超前滞后环节虚拟惯性的VSG控制策略[J].中国电机工程学报,2016,36(18):1-9.
[9]王磊,郭瑞,荣德生,等.微电网磁耦合双向直流变换器控制策略[J].电力电子技术,2016,50(8):1-4.
[10]许小彦,杨才建,MINDYKOWSKI J.有源滤波器空间矢量脉宽调制电流跟踪算法的优化[J].电力系统自动化,2012,36(4):80-84.
[11]于槟华,龚仁喜,郭柏佑,等.一种改进的有源滤波器电流跟踪控制策略[J].电测与仪表,2015,52(24):74-79.
[12]姜卫东,汪磊,马炜程,等.一种电流跟踪误差补偿的三相有源电力滤波器的无差拍控制方法[J].中国电机工程学报,2016,36(20):5605-5615.
[13]蔡斌军,朱建林.光伏并网逆变器的自抗扰电流跟踪控制[J].电力自动化设备,2012,32(3):104-108.
[14]陈增禄,任记达,毛惠丰,等.新型双重Δ调制电流跟踪控制方法的研究[J].电网技术,2005,29(12):62-65.
[15]申张亮,郑建勇,梅军,等.基于改进电压空间矢量调制的有源滤波器双滞环电流跟踪控制策略[J].中国电机工程学报,2011,31(15):8-14.
[16]吴敬兵,罗安,杨晓峰,等.一种基于延时补偿的电流跟踪控制新方法[J].电工技术学报,2012,27(4):123-130.