改进无差拍控制策略的仿真分析
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摘要
针对延时问题带给级联H桥SVG的差一拍问题,提出了一种在dq坐标系下实施的改进离散无差拍控制方法。为减小延时,提前观测下一拍指令电流,改变了常规电流状态观测器的结构,预先计算设置中间变量。同时为了提高输出电压的预测精度,为此采用了重复控制预测算法。最后为了证明改进无差拍控制方法的可行性和优越性,运用MATLAB完成了仿真验证,结果表明:改进的无差拍控制算法可以有效提高系统的动态和稳态性能,除掉了系统的跟踪滞后问题,减小了系统的输出电压误差,补偿效果更加明显。
In view of the delay problem,a modified discrete deadbeat control method was proposed in the dq coordinate system for the differential beat problem of cascaded H bridge SVG.In order to reduce the delay and observe in advance the next shot instruction current,the structure of the conventional current observer was changed,and the intermediate variables were precalculated.Meanwhile,in order to improve the prediction accuracy of output voltage,repetitive control prediction algorithm was adopted.Finally,in order to prove the feasibility and superiority of the improved deadbeat control method,the MATLAB simulation experiment was carried out.The results showed that the improved deadbeat control algorithm could effectively improve the dynamic and steady performance of the system,eliminate the tracking lag problem of the system and reduce the output voltage error caused by the capacitance voltage of the DC side,and the compensation effect was more obvious.
In view of the delay problem,a modified discrete deadbeat control method was proposed in the dq coordinate system for the differential beat problem of cascaded H bridge SVG.In order to reduce the delay and observe in advance the next shot instruction current,the structure of the conventional current observer was changed,and the intermediate variables were precalculated.Meanwhile,in order to improve the prediction accuracy of output voltage,repetitive control prediction algorithm was adopted.Finally,in order to prove the feasibility and superiority of the improved deadbeat control method,the MATLAB simulation experiment was carried out.The results showed that the improved deadbeat control algorithm could effectively improve the dynamic and steady performance of the system,eliminate the tracking lag problem of the system and reduce the output voltage error caused by the capacitance voltage of the DC side,and the compensation effect was more obvious.
引文
[1]江道灼,张振华.三相H桥级联静止同步补偿器的控制策略[J].高电压技,2011,37(8):2024-2031.
[2]王久和.电压型PWM整流器数学模型及非线性控制策略[J].北京信息科技大学学报(自然科学版).2011,26(4):15-20.
[3]孙醒涛,吴凤江,孙力.一种新型的H桥级联型逆变器空间矢量控制方法[J].电气传动,2008,38(5):35-38.
[4]崔影.基于级联H桥的中压SVG控制策略研究[D].哈尔滨:哈尔滨工业大学,2012:12-17.
[5]尹璐,赵争鸣,贺凡波,等.电网电压畸变情况下三相PWM整流器无差拍电流控制[J].清华大学学报,2013,53(11):1637-1644.
[6]HERBST G.Practical active disturbance rejection control:Bumpless transfer,rate limitation,and incremental algorithm[J].IEEE Transactions on Industrial Electronics,2016,63(3):1754-1762.
[7]江道灼,张振华.单相H桥级联静止同步补偿器反馈线性化解耦控制[J].电网技术,2011,35(11):74-79.
[8]高志强.自抗扰控制思想探究[J].控制理论与应用,2013,30(12):1498-1510.
[9]江道灼,张振华.三相H桥级联静止同步补偿器的控制策略[J].高电压技术,2011,37(8):2024-2031.
[10]陈章宝,尹文琴,刘晓玲,等.基于MWI225-17E9型IGBT模块的有源电力滤波器仿真[J].广东电力,2011,24(8):17-20.
[11]赵国鹏,刘进军.并联型电能质量控制器电流控制误差的研究[J].中国电机工程学报,2010,30(34):57-62.
[12]牛里,杨明,刘可述,等.永磁同步电机电流预测控制算法[J].中国电机工程学报,2012,32(6):131-137.
[13]毛彦辉,夏明超,李晓亮,等.负载不平衡下D-STAT-COM控制策略的仿真研究[J].电力系统保护与控制,2013,41(24):132-139.
[14]王轩,林嘉扬,滕乐天等.d-q-0坐标系下链式STAT-COM电流控制策略[J].中国电机工程学报,2012,32(15):48-54.
[15]何英杰,刘进军,王兆安,等.基于重复预测原理的三电平APF无差拍控制方法[J].电工技术学报,2010,25(2):114-120.
[2]王久和.电压型PWM整流器数学模型及非线性控制策略[J].北京信息科技大学学报(自然科学版).2011,26(4):15-20.
[3]孙醒涛,吴凤江,孙力.一种新型的H桥级联型逆变器空间矢量控制方法[J].电气传动,2008,38(5):35-38.
[4]崔影.基于级联H桥的中压SVG控制策略研究[D].哈尔滨:哈尔滨工业大学,2012:12-17.
[5]尹璐,赵争鸣,贺凡波,等.电网电压畸变情况下三相PWM整流器无差拍电流控制[J].清华大学学报,2013,53(11):1637-1644.
[6]HERBST G.Practical active disturbance rejection control:Bumpless transfer,rate limitation,and incremental algorithm[J].IEEE Transactions on Industrial Electronics,2016,63(3):1754-1762.
[7]江道灼,张振华.单相H桥级联静止同步补偿器反馈线性化解耦控制[J].电网技术,2011,35(11):74-79.
[8]高志强.自抗扰控制思想探究[J].控制理论与应用,2013,30(12):1498-1510.
[9]江道灼,张振华.三相H桥级联静止同步补偿器的控制策略[J].高电压技术,2011,37(8):2024-2031.
[10]陈章宝,尹文琴,刘晓玲,等.基于MWI225-17E9型IGBT模块的有源电力滤波器仿真[J].广东电力,2011,24(8):17-20.
[11]赵国鹏,刘进军.并联型电能质量控制器电流控制误差的研究[J].中国电机工程学报,2010,30(34):57-62.
[12]牛里,杨明,刘可述,等.永磁同步电机电流预测控制算法[J].中国电机工程学报,2012,32(6):131-137.
[13]毛彦辉,夏明超,李晓亮,等.负载不平衡下D-STAT-COM控制策略的仿真研究[J].电力系统保护与控制,2013,41(24):132-139.
[14]王轩,林嘉扬,滕乐天等.d-q-0坐标系下链式STAT-COM电流控制策略[J].中国电机工程学报,2012,32(15):48-54.
[15]何英杰,刘进军,王兆安,等.基于重复预测原理的三电平APF无差拍控制方法[J].电工技术学报,2010,25(2):114-120.