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| Nonlinear PID optimal control method applied to Buck-Boost converters |
| Lan Zhiyong, Chen Lijun, Jiao Shi, Li Li, Wang Bo |
| Information Engineering College of Xiangtan University, Xiangtan, Hu’nan 411105; |
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Abstract In order to improve the control performance of DC/DC Buck-Boost power converters, a nonlinear optimal control strategy of differential geometry is combined with the traditional PID. The nonlinear PID optimal controller is designed to regulate the output voltage. This controller consists of two parts: one is the PI feedback control of the output voltage, to track the desired output accurately; the other part is the system state of linear accurate feedback model, realize the system optimal control. The controller retains the advantages of PID control, simple structure, easy to implement. It also can shorten the transition process, improve the steady-state accuracy, and enhance the system to the parameters of the robustness due to the nonlinear integral feedback of the output voltage. Compared with the traditional PID control method, the simulation results show that the system with the nonlinear PID optimal controller strategy, has small static error and superior performance, and has strong robustness to the input voltage disturbance and the load disturbance.
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Received: 22 September 2017
Published: 19 March 2018
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| Cite this article: |
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Lan Zhiyong,Chen Lijun,Jiao Shi等. Nonlinear PID optimal control method applied to Buck-Boost converters[J]. Electrical Engineering, 2018, 19(3): 55-59.
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http://dqjs.cesmedia.cn/EN/Y2018/V19/I3/55
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[1] 乐江源, 谢运祥, 洪庆祖, 等. Boost变换器精确反馈线性化滑模变结构控制[J]. 中国电机工程学报, 2011, 31(30): 16-23.
[2] 乐江源, 谢运祥, 冀玉丕, 等. CCM Buck变换器的精确反馈线性化滑模变结构控制[J]. 华南理工大学学报(自然科学版), 2012, 40(2): 130-135, 160.
[3] 帅定新, 谢运祥, 王晓刚. Boost变换器状态反馈的精确线性化控制[J]. 华南理工大学学报(自然科学版), 2009, 37(2): 134-139.
[4] 邓卫华, 张波, 胡宗波, 等. CCM Buck变换器的状态反馈精确线性化的非线性解耦控制研究[J]. 中国电机工程学报, 2004, 24(5): 120-125.
[5] 张国荣, 武志强, 马催. Buck-Boost基于精确反馈线性化统一控制研究[J]. 电力电子技术, 2016, 50(7): 4-7.
[6] 邓卫华, 张波, 丘东元, 等. 电流连续型Boost变换器状态反馈精确线性化与非线性PID控制研究[J]. 中国电机工程学报, 2004, 24(8): 45-50.
[7] 乐江源. 基于微分几何理论电力电子变换器非线性复合控制研究[D]. 广州: 华南理工大学, 2011.
[8] 吴忠, 刘朝辉. 基于电流模式的DC/DC升压变换器非线性PI控制[J]. 中国电机工程学报, 2011, 31(33): 31-36.
[9] 孙大鹰, 徐申, 孙伟锋, 等. Buck型DC-DC变换器中数字预测模糊PID控制器的设计与实现[J]. 东南大学学报(自然科学版), 2014, 44(5): 897-901. |
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2018, Vol. 19 
