Frequency conversion solution for beam pumping unit

Energy is the basis of modern industrial life, oil is still the main energy industry. With the rapid development of China's economy, China's oil consumption has increased significantly, and the international oil price is also in constant fluctuations. The status of oil and gas and other energy industries in the national economic industry is getting higher and higher, which has a broad impact on China's economic development. The development trend of oil exploitation is to effectively control the key technical links in the production process, improve the working efficiency of oil and gas production, reduce energy consumption and improve the overall information of oil field.

Beam pumping unit

The beam pumping unit moves up and down repeatedly, one stroke is lifted once, and its power comes from two balance blocks of considerable weight driven by the electric motor. When the balance block is lifted, the oil production rod is sent into the well, and when the balance block is lowered, the oil production rod is lifted with oil to the wellhead. Due to the motor speed must, in the process of the slider down, load loss, energy cannot be load motor, enter a state of renewable power generation, lead to motor to excess energy feedback to the power grid, the main loop of the cause of busbar voltage rise, will inevitably impact on the entire power grid, leading to decline in the quality of power supply, power factor is reduced, frequent high-pressure shock can damage motor, motor shortened lifespan, maintenance quantity increase.

On the other hand, in order to overcome the large starting torque, the electric motor used in the beam pumping unit is far greater than the actual power required. The utilization rate of the electric motor is generally between 20%~30% and the highest is not more than 50%. The electric motor is often in the state of light load, which causes the waste of electric motor resources. Moreover, the working conditions of the pumping unit are continuously changing, which all depend on the underground state. In order to save energy and improve the working efficiency of the motor, frequency conversion transformation is needed.

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