CN202142868U

CN202142868U - Motor power saving system of oil pumping unit in oil field

Info

Publication number: CN202142868U
Application number: CN 201120275377
Authority: CN
Inventors: 薛世君; 殷建银; 任雁
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-08-01
Filing date: 2011-08-01
Publication date: 2012-02-08
Anticipated expiration: 2021-08-01

Abstract

The utility model discloses a motor power saving system of an oil pumping unit in an oil field, which relates to the technical field of oil pumping devices for oil field exploit. The motor power saving system comprises a high-voltage power supply, a transformer, a start-up and shut-down circuit, a thyristor drive circuit, a thyristor group and a motor electrically connected in sequence, and a micro process control center is also comprised, wherein a current transformer is electrically connected with the thyristor group; a voltage control module is electrically connected with the transformer; and the current transformer and the voltage control module are electrically connected with the micro process control center respectively. The working current of the thyristor group can be monitored through current transformer in a real-time manner and the practical working current of the motor is obtained, when the practical load is far lower than the rated load of the motor, the micro process control center can lower the output voltage of the transformer, so that the working voltage of the motor is lowered, and the current of the motor is lowered at the same time, thus the power factor of the motor is improved, namely, the purpose of power conservation is achieved.

Description

A kind of motor power saving system of oil-field oil pumper

Technical field

The utility model relates to oilfield exploitation pumping unit technical field, relates in particular to a kind of motor power saving system of oil-field oil pumper.

Background technology

At present, in oilfield exploitation pumping technology field, oil pumper is the equipment that people often use, and is the equipment of power consumption the most in the oilfield exploitation.Calculate by every capacity motor 30kw (actual capacity is higher than 30kw, and what use was maximum in the oil field is 37kw and 45kw motor, and part is used 55kw and 75kw motor), the installation total capacity is more than three gigawatts.As using maximum energy consumption equipments in the field produces, the load factor of oil pumper dragging motor is generally lower, causes waste of electric energy.In actual mining operations process, oil pumper receives the influence of many objective factors such as the well depth, oil, impurity, silt content, water content of oil well, must adjustment operation jig frequency, stroke, even change motor, change the power of motor; Simultaneously, because the difference of geographical position of living in, oil field, latitude, and the natural causes such as weather of their location, also can exert an influence to mining operations, require oil pumper to carry out the control corresponding adjustment according to actual condition.Defectives such as the control operation of existing oil pumper ubiquity is dumb, and utilization rate of electrical is lower.

The utility model content

Weak point to above-mentioned prior art existence; The purpose of the utility model is to provide a kind of and can monitors in real time the oil pumping amount of oil pumping machine oil pumping mouth; And according to the operating voltage of oil pump capacity control motor or not work; Thereby guaranteed the full oily rate of oil pumper, improved the utilization rate of electric energy, reached purpose energy-conservation, economize on electricity.

The purpose of the utility model realizes through following technical proposals:

A kind of motor power saving system of oil-field oil pumper; Comprise high voltage source, transformer, startup and the halt circuit, thyristor driving circuit, thyristor groups and the motor that are electrically connected successively; Also comprise little processing controls center; Be electrically connected with current transformer on the thyristor groups, be electrically connected with voltage control module on the transformer, current transformer and voltage control module are electrically connected with little processing controls center respectively.

In order to realize the utility model better, said little processing controls center also is electrically connected with flow sensor and shuts down module, shuts down module and is located on startup and the halt circuit.

Further, said little processing controls center is the AVR series microprocessor.

As preferably, said thyristor groups comprises two groups of anti-parallel thyristors, and is connected with fin on every group of anti-parallel thyristor.

As preferably, said motor is a three phase squirrel cage induction motor.

The utility model is compared than prior art, has the following advantages and beneficial effect:

1. the utility model is through the real-time monitoring of current sensor to the thyristor groups operating current; And obtain the real work electric current of motor, when the actual load of motor during well below the rated load of motor, little processing controls center can reduce the output voltage of transformer; Thereby reduced the operating voltage of motor; The electric current of motor also just decreases, thereby improves the power factor of motor, promptly reaches purpose of energy saving.

2. the flow sensor of the utility model can detect the flow of oil pumper outlet oil in real time; When oil pumper exports oil mass less than set point; Little processing controls center can quit work a period of time through shutting down the module controls motor; And then open motor automatically, guarantee the full oily rate of oil pumper, and reached purpose of energy saving.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Wherein, the pairing name of the Reference numeral in the accompanying drawing is called:

The 1-high voltage source, the 2-transformer, 3-starts and halt circuit, the 4-thyristor driving circuit, the 5-thyristor groups, the 6-motor, the little processing controls of 7-center, the 8-current transformer, the 9-voltage control module, the 10-flow sensor, 11-shuts down module.

Embodiment

Below in conjunction with embodiment the utility model is done to specify further:

Embodiment

As shown in Figure 1, a kind of motor power saving system of oil-field oil pumper comprises high voltage source 1, transformer 2, startup and the halt circuit 3, thyristor driving circuit 4, thyristor groups 5 and the motor 6 that are electrically connected successively.Thyristor groups 5 comprises two groups of anti-parallel thyristors, and is connected with fin on every group of anti-parallel thyristor.Motor 6 is a three phase squirrel cage induction motor.The utility model also includes little processing controls center 7, and little processing controls center 7 is adopted as the AVR series microprocessor.Be electrically connected with current transformer 8 on the thyristor groups 5, be electrically connected with voltage control module 9 on the transformer 2, current transformer 8 is electrically connected with little processing controls center 7 respectively with voltage control module 9.Little processing controls center 7 also is connected with flow sensor 10 and shuts down module 11 through the A/D end, and flow sensor 10 is arranged at the oil-out place of oil pumper, shuts down module 11 and is located on startup and the halt circuit 3.

The operation principle of the motor power saving system of this oil-field oil pumper is following:

Current transformer 8 real-time trackings detect the output current in the thyristor groups 5, and detected current signal feeds back to little processing controls center 7, thereby learn the actual load of motor 6 this moment.The actual load of motor 6 and the rated load of motor 6 are compared in little processing controls center 7; When if the actual load of motor 6 is significantly less than the rated load of motor 6 (such as the motor actual load be lower than the motor rated load 50%), little processing controls center 7 can reduce the output voltages of transformers 2 automatically through voltage control module 9; At this moment, the operating voltage of motor 6 will reduce, and the electric current of motor 6 also decreases, and promptly the exciting current of motor reduces, and the power factor of motor improves, and promptly reaches purpose energy-conservation, economize on electricity.Simultaneously in order further to reach purpose of saving; Utilize flow sensor 10 to detect the flow of oil pumper oil-out; When oil well exported oil mass less than set point, 7 controls of little processing controls center were shut down modules 11 and are stopped 6 work a period of times (time can artificially be provided with) of motor automatically, and then open motor 6 automatically; Guarantee the full oily rate of oil pumper, the shutdown module 11 that starts or stops by startup and halt circuit 3 (being start-stop control circuit) and 7 controls of little processing controls center of motor 6 realizes jointly.

The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.

Claims

1. the motor power saving system of an oil-field oil pumper; Comprise high voltage source (1), transformer (2), startup and the halt circuit (3), thyristor driving circuit (4), thyristor groups (5) and the motor (6) that are electrically connected successively; It is characterized in that: also comprise little processing controls center (7); Be electrically connected with current transformer (8) on the thyristor groups (5), be electrically connected with voltage control module (9) on the transformer (2), current transformer (8) and voltage control module (9) are electrically connected with little processing controls center (7) respectively.

2. according to the motor power saving system of the described a kind of oil-field oil pumper of claim 1, it is characterized in that: said little processing controls center (7) also is electrically connected with flow sensor (10) and shuts down module (11), shuts down module (11) and is located on startup and the halt circuit (3).

3. according to the motor power saving system of the described a kind of oil-field oil pumper of claim 1, it is characterized in that: said little processing controls center (7) is the AVR series microprocessor.

4. according to the motor power saving system of the described a kind of oil-field oil pumper of claim 1, it is characterized in that: said thyristor groups (5) comprises two groups of anti-parallel thyristors, and is connected with fin on every group of anti-parallel thyristor.

5. according to the motor power saving system of the described a kind of oil-field oil pumper of claim 1, it is characterized in that: said motor (6) is a three phase squirrel cage induction motor.