多谐振最优伺服控制器在中频电源中的应用

doi:10.19595/j.cnki.1000-6753.tces.160932

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Abstract The linear quadratic regulator cannot track reference without static error, and the output voltage total harmonic distortion (THD) is too high when proportional-resonant (PR) controller carries nonlinear load. Therefore, this paper presents an optimal multi-resonant servo control for the design of medium frequency power supply. This method can stabilize the closed-loop system stability and realize asymptotic tracking. Moreover, it has rapid dynamic response and strong harmonic suppression. A model of the medium frequency power system is established, and multi-resonant servo control is theoretic analyzed. Through the method of increasing the dimension of system matrix, the optimal tracking problem is transformed into the optimal adjustment problem. The LQR function of Matlab software is used to obtain the status feedback gain matrix. The simulations and experiments on the prototype show that the designed controller can bring good steady-state performance and dynamic performance to the closed-loop system, where the steady state voltage is between 114.8V and 115.2V and the dynamic recovery time is within 10ms. It is capable of strong anti-interference in the nonlinear load, and the output voltage harmonic is much lower than that by the PR control and robust control methods.

Key words： Medium frequency power supply servo control linear quadratic regulator (LQR) control multi-resonant harmonic rejection

Published: 16 January 2018

PACS:

TM464

Fund:国家自然科学基金（51407189,51507185）和国家重点基础研究发展计划（973计划）（2015CB251004）资助项目

Corresponding Authors: 聂子玲男,1975年生,教授,博士生导师,研究方向电力电子与电力传动。E-mail: nieziling@163.com

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	Zhang Yinfeng
	Nie Ziling
	Zhao Zhihua
	Li Huayu
	Li Changle

Cite this article:

Zhang Yinfeng,Nie Ziling,Zhao Zhihua等. Application of Multi-Resonant Optimal Servo Controller in Medium Frequency Power Supply[J]. Transactions of China Electrotechnical Society, 2017, 32(24): 174-183.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.160932 OR https://dgjsxb.ces-transaction.com/EN/Y2017/V32/I24/174

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