一种双向隔离DC-DC变换器二次纹波电压抑制方法
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摘要
针对双向隔离DC-DC变换器二次纹波电压抑制问题,提出一种基于该变换器大信号数学模型的反馈线性化二次纹波扰动前馈的移相控制方法。该方法以双向隔离DC-DC变换器大信号状态空间平均方程数学模型为基础,采用反馈线性化方法结合输出扰动量前馈移相控制,将非线性控制转换为线性控制,实现耦合控制变量的解耦,并推导出该方法下的控制规则。对控制规则进行详细推导,并根据控制规则设计基于可编程逻辑器件的控制核心。最后,通过小功率单相三电平二极管钳位AC-DC-DC变换器实验系统,验证了所提控制方法比传统PI控制和电压前馈控制具有更好的二次纹波电压抑制能力。
In order to suppress the second-order ripple voltage of bidirectional isolation DC-DC converter, a second order ripple feedforward phase-shift control with feedback linearization is proposed. Based on the large signal state-space-averaged modeling, this control includes a phase-shift algorithm of feedback linearization and an output disturbance feedforward algorithm. By converting the nonlinear to linear model, the coupling control variable is decoupled. Then the control rules according to this method is derived and designed on programmable logic device. Finally, a small scale single-phase three-level diode-clamped bidirectional isolation AC-DC-DC converter is tested. The experimental results verifies that the proposed control method has better suppression ability of the second-order ripple voltage suppression than conventional PI control and input voltage feedforward control.
In order to suppress the second-order ripple voltage of bidirectional isolation DC-DC converter, a second order ripple feedforward phase-shift control with feedback linearization is proposed. Based on the large signal state-space-averaged modeling, this control includes a phase-shift algorithm of feedback linearization and an output disturbance feedforward algorithm. By converting the nonlinear to linear model, the coupling control variable is decoupled. Then the control rules according to this method is derived and designed on programmable logic device. Finally, a small scale single-phase three-level diode-clamped bidirectional isolation AC-DC-DC converter is tested. The experimental results verifies that the proposed control method has better suppression ability of the second-order ripple voltage suppression than conventional PI control and input voltage feedforward control.
引文
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[14]王金平,许建平,兰燕妮,等.基于输入电压前馈补偿的开关变换器恒定导通时间控制技术[J].电工技术学报,2012,27(2):18-22.Wang Jinping,Xu Jianping,Lan Yanni,et al.Constant on-time control of switching DC-DC converters based on input voltage feed-forward compensation[J].Transactions of China Electrotechnical Society,2012,27(2):18-22.
[15]Wang R,Wang F,Lai R,et al.Study of energy storage capacitor reduction for single phase PWM rectifier[C]//Applied Power Electronics Conference and Exposition(APEC),Washington,USA,2009:1177-1183.
[16]Cardozo D D M,Balda J C,Trowler D,et al.Novel nonlinear control of dual active bridge using simplified converter model[C]//Applied Power Electronics Conference and Exposition(APEC),California,USA,2010:321-327.
[17]Zhao B,Song Q,Liu W.Power characterization of isolated bidirectional dual-active-bridge DC-DC converter with dual-phase-shift control[J].IEEE Transactions on Power Electronics,2012,27(9):4172-4176.
[18]胡斌,杨中平,黄先进,等.用于超级电容储能系统的三电平双向直流变换器及其控制[J].电工技术学报,2015,30(8):83-89.Hu Bin,Yang Zhongping,Huang Xianjin,et al.Three-level bi-directional DC-DC converter and its control strategy used for super-capacitor energy storage system[J].Transactions of China Electrotechnical Society,2015,30(8):83-89.
[2]兰征,涂春鸣,肖凡,等.电力电子变压器对交直流混合微网功率控制的研究[J].电工技术学报,2015,30(23):50-57.Lan Zheng,Tu Chunming,Xiao Fan,et al.The power control of power electronic transformer in hybrid AC-DC microgrid[J].Transactions of China Electrotechnical Society,2015,30(23):50-57.
[3]She X,Huang A Q,Wang G.3-D space modulation with voltage balancing capability for a cascaded seven-level converter in a solid-state transformer[J].IEEE Transactions on Power Electronics,2011,26(12):3778-3789.
[4]Fan H,Li H.High-frequency transformer isolated bidirectional DC-DC converter modules with high efficiency over wide load range for 20k V·A solidstate transformer[J].IEEE Transactions on Power Electronics,2011,26(12):3599-3608.
[5]高宁,陈强,李睿,等.一种基于模式切换的隔离型双向直流变换器效率优化方法[J].电工技术学报,2016,31(6):135-143.Gao Ning,Chen Qiang,Li Rui,et al.Optimization of isolated bi-directional DC-DC converter based on alternative modulation method[J].Transactions of China Electrotechnical Society,2016,31(6):135-143.
[6]吴振兴,邹云屏,张允,等.单相PWM整流器输入电流波形的改善技术[J].高电压技术,2008,34(3):603-608.Wu Zhenxing,Zou Yunping,Zhang Yun,et al.Supply current waveform improvement technique for single-phase PWM rectifier[J].High Voltage Engineering,2008,34(3):603-608.
[7]祝国平,阮新波,王学华,等.两级式单相逆变器二次纹波电流的抑制与动态特性的改善[J].中国电机工程学报,2013,33(12):72-80.Zhu Guoping,Ruan Xinbo,Wang Xuehua,et al.Suppression of the second harmonic current and improvement of the dynamic performance for twostage single-phase inverters[J].Proceedings of the CSEE,2013,33(12):72-80.
[8]Bai Hua,Mi Chunting,Wang Chongwu,et al.The dynamic model and hybrid phase-shift control of a dual-active-bridge converter[C]//Industrial Electronics Conference(IECON),Texas,USA,2008:2840-2845.
[9]Lu Y W,Feng Guang,Liu Yanfei.A large signal dynamic model for DC-to-DC converters with average current control[C]//Applied Power Electronics Conference and Exposition(APEC),California,USA,2004:797-803.
[10]张纯明,郭庆鼎.基于反馈线性化的交流直线永磁同步伺服电动机速度跟踪控制[J].电工技术学报,2003,18(3):5-9.Zhang Chunming,Guo Qingding.Feedback-linearization based control of speed tracking for AC linear permanent magnet synchronous servo motor[J].Transactions of China Electrotechnical Society,2003,18(3):5-9.
[11]孔令国,蔡国伟.大规模并网光伏电站的逆变器控制方法研究[J].电力系统保护与控制,2013,41(22):57-63.Kong Lingguo,Cai Guowei.Research on control method of inverters for large-scale grid-connected photovoltaic power system[J].Power System Protection and Control,2013,41(22):57-63.
[12]王利兵,毛承雄,陆继明,等.基于反馈线性化原理的直驱风力发电机组控制系统设计[J].电工技术学报,2011,26(7):1-6.Wang Libing,Mao Chengxiong,Lu Jiming,et al.Feedback-linearization control of direct-driven permanent magnet synchronous generator wind turbines[J].Transactions of China Electrotechnical Society,2011,26(7):1-6.
[13]帅定新,谢运祥,杨金明,等.基于状态反馈精确线性化单相全桥逆变器的最优控制[J].电工技术学报,2009,24(11):120-126.Shuai Dingxin,Xie Yunxiang,Yang Jinming,et al.Optimal control of single-phase full-bridge inverters by state feedback linearization[J].Transactions of China Electrotechnical Society,2009,24(11):120-126.
[14]王金平,许建平,兰燕妮,等.基于输入电压前馈补偿的开关变换器恒定导通时间控制技术[J].电工技术学报,2012,27(2):18-22.Wang Jinping,Xu Jianping,Lan Yanni,et al.Constant on-time control of switching DC-DC converters based on input voltage feed-forward compensation[J].Transactions of China Electrotechnical Society,2012,27(2):18-22.
[15]Wang R,Wang F,Lai R,et al.Study of energy storage capacitor reduction for single phase PWM rectifier[C]//Applied Power Electronics Conference and Exposition(APEC),Washington,USA,2009:1177-1183.
[16]Cardozo D D M,Balda J C,Trowler D,et al.Novel nonlinear control of dual active bridge using simplified converter model[C]//Applied Power Electronics Conference and Exposition(APEC),California,USA,2010:321-327.
[17]Zhao B,Song Q,Liu W.Power characterization of isolated bidirectional dual-active-bridge DC-DC converter with dual-phase-shift control[J].IEEE Transactions on Power Electronics,2012,27(9):4172-4176.
[18]胡斌,杨中平,黄先进,等.用于超级电容储能系统的三电平双向直流变换器及其控制[J].电工技术学报,2015,30(8):83-89.Hu Bin,Yang Zhongping,Huang Xianjin,et al.Three-level bi-directional DC-DC converter and its control strategy used for super-capacitor energy storage system[J].Transactions of China Electrotechnical Society,2015,30(8):83-89.