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Research on Network Thermodymanic and Online Temperature Estimation System Based on Submersible Motor

Author: LiuXiaoAn
Tutor: WangLiGuo
School: Harbin Institute of Technology
Course: Electrical Engineering
Keywords: Induction motor Thermal protection Temperature Monitoring Rotor resistance Rotor slot harmonics Network Thermodynamics
CLC: TM346
Type: Master's thesis
Year: 2009
Downloads: 41
Quote: 1
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Abstract


Temperature monitoring of the topic Submersible Motor Pump Co., Daqing Lishen research background , the exploitation of the late well conditions for China 's major oilfields increasingly harsh , high-temperature , high-pressure and other negative effects brought about by the depth of oil production , focusing on submersible no sensor temperature identification of the pump unit and its real-time status monitoring . The work to achieve the efficient and safe operation of the electric submersible pump unit address late high temperature negative effects of oil exploitation and provide the basis of theoretical research . The research results will be directly used in oil production and the actual , independent innovation to promote intellectual property rights of backbone enterprises of China 's large oil equipment of Daqing force God Pump Co., Ltd. . The thesis work is as follows : in the coordinate system of three-phase symmetrical mathematical model based on asynchronous motor , the motor rotor flux given the coordinates of the stationary two-phase voltage , current equations . Inductance estimates the research submersible motor temperature identification methods , process analysis applications rotor slot harmonic identification motor speed ; the given application base 2FFT fast Fourier transform to obtain the complete algorithm of asynchronous motor voltage , current spectrum . Given network thermodynamic model of the submersible motor simplified thermal model of the rotor and the stator and rotor hybrid thermal model , and laid the basis of theory and model identification for submersible motors without sensor temperature . Motor stator and rotor relative to the the environment initial temperature of the temperature rise and loss analysis , research submersible motor equivalent thermodynamic circuit ; analysis given heat dissipation capacity of the rotor and fixed air gap between the rotor heat transfer process ; simulation validation mentioned submersible motor rotor slot harmonic feasibility and superiority of the sensor temperature identification program . Establish experimental TMS320LF2812 as the control core hardware platform , the design of the data acquisition circuit , signal conditioning circuits , the main control circuit ; through the sampling of the the submersible motor voltage and current data is given based on the identification of motor speed of the rotor slot harmonic method , real-time monitoring of motor the complete rotor resistance variation calculation program , preliminary identification and monitoring sensorless rotor temperature changes . The experimental results and simulation analysis to verify the feasibility and correctness of the conclusions .

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CLC: > Industrial Technology > Electrotechnical > Motor > AC motor > Induction motor
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