Oil pumping unit well group flexible drive control system

Abstract

The invention provides an oil pumping unit well group flexible drive control system. The oil pumping well group flexible drive control system comprises a plurality of single well flexible control units and a lumped control unit; each single well control unit is correspondingly connected to one oil pumping unit; each single well flexible control unit transmits a single well production parameter and a real time condition to a lumped control unit; the lumped control unit collects data information of all single wells in the well group to perform fusion, analyzes and calculation to output various control parameters corresponding to all single wells and transmits the various control parameters to the flexible control unit of each single well; after each single well flexible control unit receives the control parameters, the single well flexible control unit regulates the operation mode and operates according to the received parameters. The oil pumping unit well group flexible drive control system realizes well group optimization regulation and control by the means of the single well flexible control, improves integral energy efficiency level of the well group, changes a traditional optimization control mode which focus on the single well and achieves system comprehensive energy saving.

Description

technical field [0001] The invention relates to a pumping unit control device, in particular to a flexible drive control system for a pumping unit well group. Background technique [0002] The beam pumping unit commonly used in oil well production has the characteristics of "big horse-drawn trolley" and rapid load dynamic changes. The redundant capacity of the transformer is large, and the loss of the transformer is serious. The flexible operation of the pumping unit system means that when the pumping unit encounters load changes, the change process of the driving force on the pumping unit system is smooth, and the fluctuation range of the crank torque and power load of the pumping unit is relatively small and uniform. Flexible operation can reduce the impact of transmission gear impact intensity and load fluctuation on the power source. [0003] The current domestic technical measures with flexible operation characteristics mainly include the following aspects: 1. The use...

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Problems solved by technology

However, due to relying on the characteristics of the motor itself, and the slip range of the motor is limited, it is limited to rely on the characteristics of the motor to realize the flexible operation of the pumping unit system

2. The pumping unit system equipped with frequency conversion controller also has certain flexible operation characteristics, and can also partially realize the suppression of reversed power generation, but it cannot recover and utilize reversed power at the same time, resulting in a waste of electric energy

The control method of single well and single unit is not only costly, but also information cannot be shared, and centralized control and management cannot be performed, which is not conducive to the overall energy saving and efficiency improvement of the pumping unit group

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