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fuzzy pi Control for Grid-side Converter of DFIG-based Wind Turbine System

Fuzzy PI Control for Grid-side Converter of DFIG-based Wind ...

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第40届中国控制会议

作者： Shuang Liu Yaozhen Han Cuiqi Du Shuzhen Li Haitao Zhang School of Information Science and Electrical Engineering Shandong Jiaotong University

The main purpose of grid-side converter control in Doubly-Fed Induction Generator（DFIG） is to maintain the constant DC link voltage and the unity power factor,while the traditional pi controller has poor dynamic performance and *** order to overcome the shortcomings of pi controller,a fuzzy pi control strategy is presented in this *** fuzzy controller is used to adjust the parameters of the pi controller,and then the optimized parameters are applied to the voltage outer loop and current inner loop *** performances were analyzed and compared under MATLAB/Simulink *** simulation results show that the proposed fuzzy pi control strategy has faster response speed than pi controller,especially when the external parameters change,it has good robustness and anti-interference performance.

关键词： Grid-side converter fuzzy pi doubly-fed induction generator

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Design of fuzzy pi Controller for Asynchronous Motor Direct Torque

Design of Fuzzy PI Controller for Asynchronous Motor Direct ...

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第30届中国控制与决策会议

作者： Lang Fu-cheng Yuan Lin Ma Jia-yi Electric Power Research Institute of State Grid Liaoning Electric Power Co. Ltd. High Voltage and Large Current Laboratory of State Grid Corporation State Grid Shen Yang Electric Power Supply Company

The traditional direct torque control（DTC） of asynchronous motor has the disadvantages of the flux linkage,large torque ripple and instable switching *** solve the above problems,a new scheme of modulating direct torque control system by adaptive fuzzy pi was put *** to the principle of fuzzy control,the regulator can perform the real-time optimization of pi parameters,realizing the good dynamic and static performance of *** order to verify the feasibility and effectiveness of this scheme,this paper builds a simulation model of direct torque control system based on adaptive fuzzy pi control regulator by using MATLAB and *** simulation results show that compared with the traditional direct torque control system,the direct torque control system modulated by adaptive fuzzy pi has the merits of obvious reducing in flux and torque ripple,significant improvement on control performance.

关键词： Asynchronous Motor fuzzy pi Torque Ripple Switching Frequency

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A Position Observer Design for Interior Permanent Magnet Synchronous Motor Based on fuzzy pi Model Reference Adaptive Control

A Position Observer Design for Interior Permanent Magnet Syn...

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第30届中国控制与决策会议

作者： Jianying Xu Ting Wu Weizhi Gu Ying Wang Riyao Chen School of Electronic and Information Engineering University of Science and Technology Liaoning Equipment Division Jinan Meide Casting Company Limited

An innovative current model with a salient pole rate is established to suit the reverse polarity of interior permanent magnet synchronous motor and the requirement of wide range speed regulation. And a model reference adaptive observer based on fuzzy pi is proposed. The proportional integral coefficient of fuzzy pi controller is adjusted to improve the estimative accuracy of rotor position and speed for PMSM by model reference adaptive observer, so that the system has a good dynamic and steady performance in the wide speed range. The effectiveness of the proposed method is demonstrated by simulation experiments in matlab/simulink.

关键词： Interior permanent magnet synchronous motor model reference adaptive system fuzzy pi extended back electromotive force

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Study of Modeling and Intelligent Control on AGC System with Wind Power

Study of Modeling and Intelligent Control on AGC System with...

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第26届中国控制与决策会议

作者： HOU Guolian ZHENG Xiaobin JIANG Pengcheng ZHANG Jianhua School of Control and Computer Engineering North China Electric Power University

In recent years, wind power which is an intermittent and random energy source affects the frequency stability of automatic generation control（AGC） system with the large-scale wind power integration. So, it is necessary to improve the conventional frequency control method and model. Firstly, a dynamic wind farm model is set up based on wind turbines clustering for the accuracy of data in this paper. Secondly, it is analyzed that the difference between multi-area interconnection AGC model and area control error（ACE） with wind farm and without wind farm. Thirdly, an intelligent control strategy of cascade control with outer loop using fuzzy pi algorithm and inner loop using internal model controller is designed to reduce the impacting of wind power changes on AGC system frequency and improve the performance of AGC system. Finally, frequency control effects of conventional AGC system and improved AGC system are contrasted by simulation study of four-area system. It is proved that the improved AGC system has stronger ability to resist fluctuation of wind power and better frequency control performance.

关键词： AGC wind power wind turbines clustering cascade control fuzzy pi internal model control

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Brushless DC Motor Control via fuzzy Systems with Variable Contraction-expansion factors

Brushless DC Motor Control via Fuzzy Systems with Variable C...

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第30届中国控制与决策会议

作者： Hong Zhao Peng Luo Ning Wang Zhongjiu Zheng Derun Zhao Marine Electrical Engineering College Dalian Maritime University

The Brushless DC Motor（BLDCM） is non-linear, multi-variable, tightly coupled. It has been widely researched in the field of motor control. However, the traditional pi controller method is vulnerable to uncertain factors in the BLDCM drive system, for instance, load disturbance and the motor parameters change, which have an impact on obtaining satisfactory control effects. This paper proposes an adaptive variable universe fuzzy pi compound control strategy with contraction-expansion factors. The self-adjustment of pi control parameters and control rules can be acquired by using variable universe adaptive fuzzy control. Finally, a double closed-loop control system of the BLDCM based on the adaptive variable universe fuzzy control algorithm is designed in Matlab/Simulink environment. Simulation results show that the BLDCM drive system based on the proposed method has faster dynamic response, stronger robustness and anti-interference ability.

关键词： Brushless DC Motor fuzzy pi Variable Universe Contraction-expansion Factor

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泵用永磁无刷直流电动机的设计与研究

泵用永磁无刷直流电动机的设计与研究

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作者：贾明月沈阳工业大学

学位级别：硕士

能源供需矛盾的加剧,使推广水泵系统节能技术具有重要的经济效益和社会效益。高效、高功率因数的稀土永磁电机为水泵节能开辟了新途径。我国有着丰富的稀土资源,发展稀土永磁电机变频调速系统具有得天独厚的优势。本文主要在分析水泵节... 详细信息

能源供需矛盾的加剧,使推广水泵系统节能技术具有重要的经济效益和社会效益。高效、高功率因数的稀土永磁电机为水泵节能开辟了新途径。我国有着丰富的稀土资源,发展稀土永磁电机变频调速系统具有得天独厚的优势。本文主要在分析水泵节能原理的基础上,将永磁无刷直流电动机(BLDCM)引入水泵系统。本文的主要工作包括以下几个方面: 1、设计了一台基于TMS320F240芯片的7.5kWBLDCM驱动器,给出了驱动器主电路设计方案以及具体控制电路;设计了系统软件,并给出各部分框图;在转速、电流双闭环控制中,转速环采用传统pi和模糊控制相结合的fuzzy pi开关控制,仿真和实验证明这种方法提高了系统动态响应。 2、分析了泵用BLDCM的电磁设计,考虑电感对电机的影响,改进了电机设计程序。 3、在分析BLDCM系统结构和运行特点的基础上,提出系统效率优化的方法。以减少驱动器损耗为目的提出了不同的PWM调制方式,并分析了对电机的影响;总结了不同超前换流角对电机效率的影响,找出BLDCM的最佳超前换流角。 4、对样机进行了空载电动势实验、负载实验,验证电机的设计方案和性能;与永磁同步电动机(PMSM)、感应电机、变频调速感应电机进行对比试验,验证提出将BLDCM应用于水泵系统节能的可行性。

关键词：水泵永磁无刷直流电动机节能 fuzzy pi 效率

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