基于扩张状态观测器估计补偿的Buck变换器带恒功率负载无源控制
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摘要
针对Buck变换器带恒功率负载(CPL)稳定性降低甚至不能稳定运行的问题,该文采用基于无源性的控制方法对其进行控制。考虑到变换器中寄生电阻的存在会导致控制器控制性能降低,将变换器中寄生电阻所造成的影响视为未知扰动,并采用扩张状态观测器(ESO)对其进行观测,由无源控制器进行实时补偿。对于扩张状态观测器中通用的非线性函数会出现无界的问题,对其进行改进,使得其更易用于实际工程中。通过零极点分布图等工具分析了控制器参数变化对于系统稳态性能及动态性能的影响。经计算机仿真证明了本文所提方法的正确性。
Passivity-based control method is used to overcome the problem that the stability of Buck converter with constant power load(CPL) can be reduced or even unstable in this paper.Considering the existence of parasitic resistance in the converter, the control performance of the controller will be reduced. In this paper, taking effects caused by the parasitic resistance of converter as unknown disturbance, the disturbance is observed by using of extended state observer, and real-time compensated by passivity-based controller. For the problem that the general nonlinear function in extend state observer(ESO) will appear unbounded, this paper improves it to make it easier to be used in practical engineering. The influence of passivity-based control parameters on the performance of the steady and dynamic of the system is analyzed by using zero-pole map and other tools. The correctness of the method proposed in this paper is proved by computer simulation.
Passivity-based control method is used to overcome the problem that the stability of Buck converter with constant power load(CPL) can be reduced or even unstable in this paper.Considering the existence of parasitic resistance in the converter, the control performance of the controller will be reduced. In this paper, taking effects caused by the parasitic resistance of converter as unknown disturbance, the disturbance is observed by using of extended state observer, and real-time compensated by passivity-based controller. For the problem that the general nonlinear function in extend state observer(ESO) will appear unbounded, this paper improves it to make it easier to be used in practical engineering. The influence of passivity-based control parameters on the performance of the steady and dynamic of the system is analyzed by using zero-pole map and other tools. The correctness of the method proposed in this paper is proved by computer simulation.
引文
[1]庞圣钊,皇甫宜耿,郭亮,等.基于Lyapunov间接法分析的恒功率负载电源变换器宽稳定控制策略[J].电工技术学报,2017,32(14):146-154.Pang Shengzhao,Huangfu Yigeng,Guo Liang,et al.A novel wide stability control strategy of constant power load power converter based on the analysis of Lyapunov indirect mothed[J].Transactions of China Electrotechnical Society,2017,32(14):146-154.
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[3]韦李军,黄萌,孙建军,等.带恒功率负载的光伏-储能混合发电系统非线性行为分析[J].电工技术学报,2017,32(7):128-137.Wei Lijun,Huang Meng,Sun Jianjun,et al.Nonlinear analysis of photovoltaic battery hybrid power system with constant power loads[J].Transactions of China Electrotechnical Society,2017,32(7):128-137.
[4]Cui Jian,Wang Jiuhe.Research on the influence of virtual damping in passivity-based controller on Boost controller[C]//Chinese Automation Congress,Jinan,2017,DOI:10.1109/CAC.2017.8243419.
[5]杜韦静,张军明,张阳,等.DC-DC变流器带恒功率负载动态响应分析及级联系统稳定性预测[J].电工技术学报,2011,26(增刊1):83-90.Du Weijing,Zhang Junming,Zhang Yang,et al.Transient load response analysis of DC-DC converter with constant power load and stability prognosis of cascaded system[J].Transactions of China Electrotechnical Society,2011,26(S1):83-90.
[6]黄建,张震.机载供电系统带恒功率负载稳定性[J].电工技术学报,2011,26(增刊1):213-217,223.Huang Jian,Zhang Zhen.Stability of aircraft power supply system with constant power load[J].Transactions of China Electrotechnical Society,2011,26(S1):213-217,223.
[7]王建华,张方华,龚春英,等.带恒功率负载的DC/DC变换器起动过程分析[J].电工技术学报,2009,24(4):121-125.Wang Jianhua,Zhang Fanghua,Gong Chunying,et al Start-up process analysis of DC/DC converter with constant power load[J].Transactions of China Electrotechnical Society,2009,24(4):121-125.
[8]Zeng Jianwu,Zhang Zhe,Qiao Wei.An interconnection and damping assignment passivity-based controller for a DC-DC Boost converter with a constant power load[J].IEEE Transactions on Industry Applications,2014,50(4):2314-2322.
[9]Suresh Singh,Deepal Fulwani,Vinod Kumar.Robust sliding-mode control of DC/DC Boost converter feeding a constant power load[J].IET Power Electronics,2015,8(7):1230-1237.
[10]Kwasinski A,Krein P T.Passivity-based control of Buck converters with constant-power loads[C]//Proceedings of IEEE Power Electronics Specialists Conference,Orlando,2007,DOI:10.1109/PESC.2007.4341998.
[11]Kwasinski A,Krein P T.Stability of constant power loads in DC-DC converters using passivity-based control[C]//Proceedings of the International IEEETelecommunications Energy Conference,Rome,2007,DOI:10.1109/INTLEC.2007.4448903.
[12]杨涛,陆益民,龙梦妮.基于端口受控哈密顿系统模型的带恒功率负载的Buck变换器控制[J].电源学报,2012(5):15-18.Yang Tao,Lu Yiming,Long Mengni.Control of a Buck converter with constant power load based on port-Hamiltonian system modeling[J].Journal of Power Supply,2012(5):15-18.
[13]高朝晖,张晓斌,林辉,等.BUCK变换器带恒功率负载反馈精确线性化控制[J].控制与决策,2009,24(7):1117-1120.Gao Chaohui,Zhang Xiaobin,Lin Hui,et al.Exact feedback linearization control to BUCK converter with constant power loads[J].Control and Decision,2009,24(7):1117-1120.
[14]Wang Junxiao,Li Shihua,Yang Jun,et al.Extend state observer-based sliding mode control for PWM-based DC-DC Buck converter systems with mismatched disturbances[J].IET Control Theory and Applications,2015,9(4):579-586.
[15]Wu Bin,Yang Jun,Wang Junxiao,et al.Extend state observer based control for DC-DC Buck converters subject to mismatched disturbances[C]//Proceedings of the 33rd Chinese Control Conference,Nanjing,2014.
[16]Li Shihua,Yang Jun,Chen Wenhua,et al.Generalized extend state observer based control for systems with mismatched uncertainties[J].IEEETransactions on Industrial Electronics,2012,59(12):4792-4802.
[17]Mustafa Alrayah Hassan,Er-Ping Li,Xue Li,et al.Adaptive passivity-based control of DC-DC Buck power converter with constant power load in DCmicrogrid systems[J].IEEE Journal of Emerging and Selected Topics in Power Electronics,2018,DOI:10.1109/JESTPE.2018.2874449.
[18]韩京清.自抗扰控制技术-估计补偿不确定因素的控制技术[M].北京:国防工业出版社,2013.
[19]王久和.先进非线性控制理论及其应用[M].北京:科学出版社,2012.
[20]李玉梅,查晓明,刘飞,等.带恒功率负荷的直流微电网母线电压稳定控制策略[J].电力自动化设备,2014,34(8):57-64.Li Yumei,Zha Xiaoming,Liu Fei,et al.Stability control strategy for DC microgrid with constant power load[J].Electric Power Automation Equipment2014,34(8):57-64.
[2]张学,裴玮,邓卫,等.含恒功率负载的交直流混联配电系统稳定性分析[J].中国电机工程学报,2017,37(19):5572-5582,5834.Zhang Xue,Pei Wei,Deng Wei,et al.Stability analysis of AC/DC hybrid distribution system with constant power loads[J].Proceedings of the CSEE,2017,37(19):5572-5582,5834.
[3]韦李军,黄萌,孙建军,等.带恒功率负载的光伏-储能混合发电系统非线性行为分析[J].电工技术学报,2017,32(7):128-137.Wei Lijun,Huang Meng,Sun Jianjun,et al.Nonlinear analysis of photovoltaic battery hybrid power system with constant power loads[J].Transactions of China Electrotechnical Society,2017,32(7):128-137.
[4]Cui Jian,Wang Jiuhe.Research on the influence of virtual damping in passivity-based controller on Boost controller[C]//Chinese Automation Congress,Jinan,2017,DOI:10.1109/CAC.2017.8243419.
[5]杜韦静,张军明,张阳,等.DC-DC变流器带恒功率负载动态响应分析及级联系统稳定性预测[J].电工技术学报,2011,26(增刊1):83-90.Du Weijing,Zhang Junming,Zhang Yang,et al.Transient load response analysis of DC-DC converter with constant power load and stability prognosis of cascaded system[J].Transactions of China Electrotechnical Society,2011,26(S1):83-90.
[6]黄建,张震.机载供电系统带恒功率负载稳定性[J].电工技术学报,2011,26(增刊1):213-217,223.Huang Jian,Zhang Zhen.Stability of aircraft power supply system with constant power load[J].Transactions of China Electrotechnical Society,2011,26(S1):213-217,223.
[7]王建华,张方华,龚春英,等.带恒功率负载的DC/DC变换器起动过程分析[J].电工技术学报,2009,24(4):121-125.Wang Jianhua,Zhang Fanghua,Gong Chunying,et al Start-up process analysis of DC/DC converter with constant power load[J].Transactions of China Electrotechnical Society,2009,24(4):121-125.
[8]Zeng Jianwu,Zhang Zhe,Qiao Wei.An interconnection and damping assignment passivity-based controller for a DC-DC Boost converter with a constant power load[J].IEEE Transactions on Industry Applications,2014,50(4):2314-2322.
[9]Suresh Singh,Deepal Fulwani,Vinod Kumar.Robust sliding-mode control of DC/DC Boost converter feeding a constant power load[J].IET Power Electronics,2015,8(7):1230-1237.
[10]Kwasinski A,Krein P T.Passivity-based control of Buck converters with constant-power loads[C]//Proceedings of IEEE Power Electronics Specialists Conference,Orlando,2007,DOI:10.1109/PESC.2007.4341998.
[11]Kwasinski A,Krein P T.Stability of constant power loads in DC-DC converters using passivity-based control[C]//Proceedings of the International IEEETelecommunications Energy Conference,Rome,2007,DOI:10.1109/INTLEC.2007.4448903.
[12]杨涛,陆益民,龙梦妮.基于端口受控哈密顿系统模型的带恒功率负载的Buck变换器控制[J].电源学报,2012(5):15-18.Yang Tao,Lu Yiming,Long Mengni.Control of a Buck converter with constant power load based on port-Hamiltonian system modeling[J].Journal of Power Supply,2012(5):15-18.
[13]高朝晖,张晓斌,林辉,等.BUCK变换器带恒功率负载反馈精确线性化控制[J].控制与决策,2009,24(7):1117-1120.Gao Chaohui,Zhang Xiaobin,Lin Hui,et al.Exact feedback linearization control to BUCK converter with constant power loads[J].Control and Decision,2009,24(7):1117-1120.
[14]Wang Junxiao,Li Shihua,Yang Jun,et al.Extend state observer-based sliding mode control for PWM-based DC-DC Buck converter systems with mismatched disturbances[J].IET Control Theory and Applications,2015,9(4):579-586.
[15]Wu Bin,Yang Jun,Wang Junxiao,et al.Extend state observer based control for DC-DC Buck converters subject to mismatched disturbances[C]//Proceedings of the 33rd Chinese Control Conference,Nanjing,2014.
[16]Li Shihua,Yang Jun,Chen Wenhua,et al.Generalized extend state observer based control for systems with mismatched uncertainties[J].IEEETransactions on Industrial Electronics,2012,59(12):4792-4802.
[17]Mustafa Alrayah Hassan,Er-Ping Li,Xue Li,et al.Adaptive passivity-based control of DC-DC Buck power converter with constant power load in DCmicrogrid systems[J].IEEE Journal of Emerging and Selected Topics in Power Electronics,2018,DOI:10.1109/JESTPE.2018.2874449.
[18]韩京清.自抗扰控制技术-估计补偿不确定因素的控制技术[M].北京:国防工业出版社,2013.
[19]王久和.先进非线性控制理论及其应用[M].北京:科学出版社,2012.
[20]李玉梅,查晓明,刘飞,等.带恒功率负荷的直流微电网母线电压稳定控制策略[J].电力自动化设备,2014,34(8):57-64.Li Yumei,Zha Xiaoming,Liu Fei,et al.Stability control strategy for DC microgrid with constant power load[J].Electric Power Automation Equipment2014,34(8):57-64.
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