The Dynamic Simulation Of Sucker-rod Pumping And Motor System And Application In Energy Saving Control

The motion rule of sucker-rod pumping and motor system is analyzed and researched in this thesis.One-dimensional dynamic model of consummate sucker-rod pumping and motor system is set up,the simulation and energy saving control of which was supported by MATLAB.In this thesis,the mathematical model of asynchronous motor considering quasi-saturation and sucker-rod pumping load with constant polished rod load are established, and asynchronous motor with this kind of load is simulated.And then,the article priority researching the motion rule of sucker rod string,the wave equation was deduced and solved. On the basis of the above research,one-dimensional dynamic model of consummate sucker-rod pumping and motor system taking account of motor rotating speed fluctuations and sucker rod string vibration is established.Furthermore,Crank balance problem and intermittent power supply were simulation,the conclusion which intermittent power supply combined with Y-Δtransition can get higher energy saving effect is obtained from simulation for balance this system.