The Application Of Frequency Control Of Motor Speed And Reliability Of The Research

Shengli Oilfield has broader geographic distribution oil and gas, currently it is facing the situation of multi-well, and staff shortage. With the rapid economic development, crude oil demand and rising prices, improve oil recovery and reduce energy consumption has become the problem must be solved now. In order to raise labor productivity, and integration of existing human resources, new wells and some wells especially in higher yield need install frequency control devices. Frequency control system have power-saving, environmental protection, low noise, power factor, high equipment small impact.From the frequency converter technology application basis, introduces the frequency main circuit, control type and characteristic analysis.discussed the application problem of frequency converter:according to different parameters, conditions, types of production machinery, speed range, torque and put forward how to choose an appropriate frequency converter, when applying some techniques, frequency values of the right choice. Introduces the application of frequency converter in industrial and mining enterprises in detail, put forward the application situation in the oil field, using frequency converter to improve the environment, the use of the " slow upside and quickly downside " method in the oil field. Summarize the remote control of frequency converter in the oil field.Frequency converter uses a large number of non-linear power electronic components such as transistors, resulting in pulsating current in power grip impedance is formed on the pulsation pressure drop is superimposed on the power frequency voltage, come to being voltage distortion. While the output voltage and current is composed of SPWM wave and triangular dial nodal, is not the standard sine wave, therefore also contain harmonics, this is the reason of inverter input, output side of high order harmonic generation. From the inverter input, output sides are respectively introduced its high order harmonic generation mechanism, summarizes the interferences to other devices and harm, put forward to prevent harmonic interference countermeasures on both sides.