CN201118511Y - Intelligent energy-saving controller for immersed oil power pump - Google Patents

Abstract

A smart power-saving controller for an electric submersible pump mainly solves the problems of low power factor and large power consumption of the electric submersible pump in the prior art. The utility model is characterized in that the three-phase voltage and current sampling signal input ends on a digital signal processor (DSP) are connected with the three-phase voltage and current sampling signal input ends (U1, U2, U3, I1, I2, I3) on a voltage and current sampling circuit through resistors; the transformer step-up/step-down control signal output ends on the digital signal processor (DSP) are connected with the transformer step-up/step-down control signal input ends (C4, C5, C6) on an on-load voltage regulation transformer step-up/step-down control circuit; the transformer gear control signal output ends on the digital signal processor (DSP) are connected with the transformer gear control signal input ends (C1, C2, C3) on an on-load voltage regulation transformer gear processing circuit. The smart power-saving controller of the utility model can automatically regulate the power supply voltage of the motor when the load of the electric submersible pump changes, so as to achieve the purposes of saving energy and reducing operating costs.

Description

Submersible electric pump intelligent energy-saving controller

Technical field:

The utility model relates to a kind of control device that is applied in the oil recovery field, oil field on the submersible electric pump drive system, specifically relates to the intelligentized electricity-saving control device of a kind of submersible electric pump.

Background technology:

At present, most of submersible electric pump in domestic oil field exists the problem of low load operation.This is because the oil field designer selects motor according to the maximum detent torque of electric pump, when electric pump is finished the phenomenon that the little load of high-power drive will take place when startup enters normal operation.Along with the increase of oil pumping time, pasta will constantly descend simultaneously, and load will be more and more lower, finally forms so-called " low load with strong power " phenomenon, causes the electric pump power factor very low therefrom, and the reactive loss of generation is bigger, and power consumption is many.

The utility model content:

Work long hours and cause the problem that the electric pump power factor is low, power consumption is big in order to solve the motor that exists in the existing submersible electric pump drive system in low load condition, the utility model provides a kind of submersible electric pump intelligent energy-saving controller, when can changing in the load of submersible electric pump, this kind submersible electric pump intelligent energy-saving controller adjusts the supply power voltage of motor automatically, to realize higher power factor, thereby reduced the power consumption of motor itself, realized saves energy, reduced the purpose of operating cost.

The technical solution of the utility model is: this kind submersible electric pump intelligent energy-saving controller, by the digital signal processor that places in the housing, the electric current and voltage sample circuit, on-load tap-changing transformer gear treatment circuit, on-load tap-changing transformer buck control circuit and keyboard circuit, compositions such as display circuit, three-phase voltage current sampling signal input on the wherein said digital signal processor is connected with three-phase voltage current sampling signal input on the electric current and voltage sample circuit through resistance, transformer buck control signal output ends on the described digital signal processor is connected with transformer buck signal input end on the on-load tap-changing transformer buck control circuit, and the transformer gear control signal output ends on the described digital signal processor is connected with transformer gear signal input end on the on-load tap-changing transformer gear treatment circuit.

The utlity model has following beneficial effect: after this kind submersible electric pump intelligent energy-saving controller is inserted the submersible electric pump drive system, the major control on-load tap-changing transformer, when load changes or during mains ripple, this controller can be according to voltage, the signal that current transformer transmits sends instruction after by digital signal processor processes automatically, pressure regulation motor on the driving on-load tap-changing transformer and on load tap changer are regulated the output voltage of power transformer, thereby allow motor be in constantly on the optimum efficiency running status, the final reduction power consumption of realizing, improve the purpose of whole power factor of electric network.

Description of drawings:

Fig. 1 is that the utility model is connected into the composition schematic diagram in the submersible electric pump drive system.

Fig. 2 is an electrical system schematic diagram of the present utility model.

Fig. 3 is the current sampling circuit figure in the utility model.

Fig. 4 is the voltage sampling circuit figure in the utility model.

Fig. 5 is the on-load tap-changing transformer buck control circuit figure in the utility model.

Fig. 6 is the on-load tap-changing transformer gear treatment circuit figure in the utility model.

Embodiment:

The utility model is described in further detail below in conjunction with accompanying drawing:

By shown in Figure 2, this kind submersible electric pump intelligent energy-saving controller, by the digital signal processor DSP that places in the housing, the electric current and voltage sample circuit, on-load tap-changing transformer gear treatment circuit, on-load tap-changing transformer buck control circuit and keyboard circuit, compositions such as display circuit, wherein, the three-phase voltage current sampling signal input U1 of three-phase voltage current sampling signal input on the described digital signal processor on resistance and electric current and voltage sample circuit, U2, U3, I1, I2, I3 connects, transformer buck signal input end C4 on transformer buck control signal output ends on the described digital signal processor and the on-load tap-changing transformer buck control circuit, C5, C6 connects, the transformer gear signal input end C1 on transformer gear control signal output ends on the described digital signal processor DSP and the on-load tap-changing transformer gear treatment circuit, C2, C3 connects.

In this example, the TMS320LF2402A type digit chip that DSP selects for use TI company to produce, the circuit diagram of electric current, voltage sampling circuit and on-load tap-changing transformer gear treatment circuit, on-load tap-changing transformer buck control circuit is respectively shown in Fig. 3,4,5,6.When the load of submersible electric pump changes, will cause that electric current changes or voltage ripple of power network, at this moment by voltage, the induced signal that current transformer transmits is through overvoltage, current sampling circuit is admitted on the digital signal processor in the DSP, after the routine processes through prestoring, DSP will transformer buck control signal output ends and transformer gear control signal output ends on digital signal processor send instruction, finish buck and be converted to suitable gear thereby the shunting switch motor on the driving on-load tap-changing transformer rotates, allow motor be in constantly on the optimum efficiency running status, the final reduction power consumption of realizing, improve the purpose of whole power factor of electric network.

In this example, the concrete course of work is as follows: electric current, voltage after electric current, voltage transformer and sample circuit conditioning, the weak electric signal that the forceful electric power conversion of signals can be discerned for digital processing unit DSP, electric current, voltage signal are by pin 13,14,15,16,17,18 enter in the digital processing chip.When motor is in light running, DSP controls the on-load tap-changing transformer pressure regulation according to electric current, the voltage signal of coming in real time, seeks minimum power input voltage, and when variable power is not obvious, consider the revolutional slip problem, allow motor under minimum stator current, work.When the motor underloading is sought best supply power voltage, after digital processing chip DSP calculates according to real-time electric current, voltage signal during the needs step-down, 2,3 pins of digital processing chip DSP send high level, make transistor turns in the buck control circuit, transistor turns control relay K1, the normally opened contact closure of K2.The 220V power supply is given pressure regulation motor power supply in the on-load tap-changing transformer, allows it begin just to change and carry out reduced pressure operation.When load becomes heavy, needs boosted after digital processing chip DSP calculated according to real-time electric current, voltage signal, and 2,4 pins of digital processing chip DSP send high level, make transistor turns in the buck control circuit, transistor turns control relay K1, the normally opened contact closure of K3.The 220V power supply is given pressure regulation motor power supply in the on-load tap-changing transformer, allows it begin counter-rotating and carries out boost operations.

The on-load tap-changing transformer gear signal is delivered to this electricity-saving controller through cable, signal is carried out photoelectricity with the TPL521 chip isolate, and the photoelectricity buffer action is that the interference signal that prevents power supply circuits is imported electricity-saving appliance into by gear signal, electricity-saving appliance is formed disturb.Gear signal enters 74HC165 displacement chip after photoelectricity is isolated, parallel data is transferred to serial data send into DSP, and DSP handles the back control signal is sent into display circuit, and display circuit can show current on-load tap-changing transformer gear of living in.

DSP calculates active power according to real-time electric current, voltage signal, reactive power and power factor, and display circuit can show three-phase voltage, three-phase current, input active power, reactive power and power factor in real time according to dsp control signal.

DSP selects the automatic or manual mode of operation and the electricity-saving appliance parameter is set according to the keyboard circuit signal.During manual mode, DSP carries out the buck operation according to keyboard signal control on-load tap-changing transformer.

Claims (2)

1, a kind of submersible electric pump intelligent energy-saving controller, by the digital signal processor (DSP) that places in the housing, the electric current and voltage sample circuit, on-load tap-changing transformer gear treatment circuit, on-load tap-changing transformer buck control circuit and keyboard circuit, compositions such as display circuit, it is characterized in that: the three-phase voltage current sampling signal input (U1 of the three-phase voltage current sampling signal input on the described digital signal processor (DSP) on resistance and electric current and voltage sample circuit, U2, U3, I1, I2, I3) connect, transformer buck signal input end (C4 on transformer buck control signal output ends on the described digital signal processor (DSP) and the on-load tap-changing transformer buck control circuit, C5, C6) connect, transformer gear signal input end (C1 on transformer gear control signal output ends on the described digital signal processor (DSP) and the on-load tap-changing transformer gear treatment circuit, C2 C3) connects.

2, submersible electric pump intelligent energy-saving controller according to claim 1 is characterized in that: described digital signal processor (DSP) is a TMS320LF2402A type digit chip.

Images