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Under the condition of constant pump structure parameter, liner material, oil physical property and pump pressure, (1-v) is inversely proportional to n, while (1-1) is directly proportional to N. That is, the volumetric efficiency increases with the increase of rotational speed, while the mechanical efficiency decreases slightly with the increase of rotational speed. It can be seen that when the speed is higher, the volumetric efficiency is higher, the mechanical efficiency is lower, but the total efficiency is still higher. So from the point of view of improving pump efficiency, pump speed should be as large as possible. Therefore, in the design of modular, intelligent speed control system, it is necessary to consider the oil permeability, viscosity, pressure difference at the pump end and volume efficiency on the impact of speed, the intelligent speed control system is also one of the main development directions of the current control system, which can be adjusted in time according to the change of working condition and environment. Submersible screw pump speed control system hardware structure computer, frequency converter, AC asynchronous motor, data acquisition card, downhole sensors, the data acquisition card and the neural network algorithm are fused by the interface program. After the motor is started, the signal is transmitted to the data acquisition card through the sensor, and transformed into a digital signal which is transmitted to the computer, thus realize the optimization of motor speed. QCWY-1 downhole sensor is used in downhole sensor and submersible screw pump to form a complete single well production system to measure downhole temperature and pressure of submersible screw pump. The QCWY-1 temperature and pressure measuring system is made up of a combination device mainly composed of a secondary instrument on the well (ZFPT-2002 pressure and temperature meter) and a combination device mainly composed of a downhole pressure and temperature transmitter and connected with a power cable of a submersible motor. Research on linear correction principle and program flow of power-regulating balancer. The linear correction is accomplished by the software of MCU, which makes use of the principle of closed-loop adjustment in automatic control theory. The purpose of this paper is to generate a correction control signal in a function form which is easy to express, instead of closed-loop control, and without affecting the dynamic characteristics of the rectifier system. Closed-loop error adjustment is used to correct. After using two 350kW1000Hz intermediate frequency power supply, the conclusions are as follows: (1) when the power-regulating balancer is connected but not powered on, the two intermediate frequency power supply are started up respectively, and the power-regulating is normal. (2) when the power supply of the power-regulating balancer is turned on and the K1 is disconnected, the status of the power-regulating balancer indicates the LED flash. Start two intermediate frequency power sources separately, each with normal power regulation. (3) when the power supply is turned on and the K1 is closed

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CI626A  3BSE005023R1