Beam pumping unit of electrical energy-saving measures – pumping unit, motor, en
Introduction Beam pumping unit of simple structure, high reliability, easy maintenance, to adapt to on-site conditions, the oil production facilities in more than 90%, in for a long time will remain the first choice for oilfield equipment. Electricity costs in the proportion of oil production is about 70%, how to conserve electricity as the primary task of energy conservation.
And match the beam pumping unit is commonly used three-phase field Motor In ideal circumstances, about 90% efficiency, power factor at present are mostly less than 0.4, the load rate of less than 30%, severe wasting electricity. Use of motor pumping work load is sexual intercourse with the impact of variable load cycles, and by constant load motor design and manufacture of generic job characteristics do not match. General Motors is hard characteristics of mechanical characteristics, its speed during operation of load changed little, while the pumping load increases alternating electric motor loss, coupled with the pumping unit selected does not match the actual needs, reducing machine ground efficiency. Electrical characteristics of pumping unit, pumping units according to each specific "root" location, considering the development of the corresponding Saving Measures to achieve the pumping unit of economic operation.
1 motor driven pumping unit production in a waste of power abuse
1.1 low motor load Order to ensure the start pumping in the run-time requirements and sufficient overload, usually installed with the motor power is larger, while the motor is running normally light load, low load caused by pumping, and the motor does not match, the formation of the "big horse car" production status, so that lines Transformer , Motor power loss increases; motor efficiency depends on the load ratio, light load efficiency of motors is very low, when the load increased to certain value, the change is small, there is proved: the load rate of <0.4, the efficiency little change, the load ratio> 0.7, the highest efficiency. When the motor load is very low, the motor will still draw from the larger grid reactive power, thereby reducing the power factor, which is the current Motor The main reason for the low power factor.
1.2 low balance Field use of the pumping unit balance is low, a serious waste of power imbalance, resulting in changes in the majority of the motor current uneven, greatly increased the motor friction and affect the pumping efficiency of the system.
1.3 generation phenomenon exists Existing power-saving measures are mostly low-load rate for the motor efficiency is low and the low power factor caused by the situation of energy waste, but waste energy pumping Another important reason is pumping drive motor power, are proved: the types of motors currently in use are the number of such situations exist.
Pumping load as volatile, the normal operation of the pumping unit will appear in the pumping unit gear box input shaft of the motor running faster than the speed of its drive situation, this time, pumping the drive motor power, its power will not be issued fully synchronized with the grid and the existing line loss, made sure the electric motor can not be used by power grid. In the electricity? Mechanical energy? Energy conversion process can have a great part of the energy is wasted.
2 beam pumping unit features energy-saving products and application
Most applications in the field of conventional type beam pumping unit, features the work load is, suspension of the velocity and acceleration of change to load is very uneven, high energy work, common imbalances ground system efficiency low power consumption and more.
Different to the type of beam pumping unit with low torque, and low motor power requirements, running balance is better. In the same case, the system efficiency 2.5-4% higher than conventional type.
Front balance beam pumping unit has a good effect, light bar maximum load is small, energy-saving effect is good.
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