CN203324747U - Direct-driven oil pumping unit controller of permanent magnet synchronous motor - Google Patents

Abstract

The utility model discloses a direct-driven oil pumping unit controller of a permanent magnet synchronous motor. The direct-driven oil pumping unit controller is used in the following steps: (1) collecting signals; (2) transmitting the signals; (3) processing the signals and judging modes, in the step a DSP data collecting module integrated with a wireless communication function, computes an area of an indicator diagram of a jig frequency after receiving digital signals of the load and the displacement of a polished rod, compares the area of the indicator diagram of the jig frequency with an area of an indicator diagram collected in a standard oil pumping process of an oil well, and judges a control mode of an oil pump unit according to the compassion of the areas; and (4) executing a mode instruction. Beneficial effects of the direct-driven oil pumping unit controller of the permanent magnet synchronous motor are that indicator diagram data of the oil well is measured in real time through sensing technologies and interval pumping is judged online, so that automatic control for interval pumping is achieved and workload of oil extraction personnel is reduced; with reasonable interval pumping, idling pumping is avoided, so that maintenance rate of a device is reduced; an object of saving energy without reducing production is achieved through self dynamic interval pumping time adjusting.

Description

A kind of permagnetic synchronous motor direct-drive oil extractor controller

Technical field

The utility model relates to a kind of permagnetic synchronous motor direct-drive oil extractor controller, belongs to the electric machines control technology field.

Background technology

Along with the continuous exploitation to oil, oneself enters the middle and later periods of exploitation China's part oil field, and the output in oil field also is being a downward trend, and the continuous liquid supply ability of oil well highlights deficiency, and between execution, extraction oil is inevitable.At present, the electric controlled energy saving purpose that oil field at home mainly utilizes energy-saving self-controlling equipment to reach often to take out well, lack between realizing that to take out that robotization controls be the equipment of major function.Therefore, development is taken out the workload that equipment can alleviate the oil extraction operation personnel between intelligence, takes out between reasonably and can avoid sky to take out, and reduces the maintenance rate of equipment, and the oneself dynamically adjusts the purpose that interval time can reach the energy-conservation not underproduction simultaneously.

The utility model content

The purpose of this utility model is to provide a kind of permagnetic synchronous motor direct-drive oil extractor controller, can realize that the robotization of oil pumper is controlled, and reduces the maintenance rate of equipment.

The purpose of this utility model is achieved through the following technical solutions: a kind of permagnetic synchronous motor direct-drive oil extractor controller, it comprises that oil well condition detects integrated long-range indicator, the DSP data acquisition module of integrated wireless communication function, PLC controller and frequency converter, wherein, the signal input part that oil well condition detects integrated long-range indicator is connected with the permagnetic synchronous motor signal transducer for driving oil pumper, for gathering permagnetic synchronous motor polished rod load and displacement signal, the signal output part that oil well condition detects integrated long-range indicator is connected with the DSP data acquisition module of integrated wireless communication function by network, the output terminal of the DSP data acquisition module of integrated wireless communication function is connected with the signal input part of PLC controller, the signal output part of PLC controller is connected with the signal input part of frequency converter, frequency converter has detection signal output terminal and control signal output terminal, wherein, the control signal output terminal is connected with permagnetic synchronous motor, the detection signal output terminal is connected with the PLC controller.

The beneficial effects of the utility model are: utilize sensing technology to measure in real time oil well load-position diagram data, between online differentiation, take out, thereby realizing between oil pumper taking out robotization controls, alleviated oil extraction operation personnel's workload simultaneously, take out and avoided sky to take out reasonably, reduced the maintenance rate of equipment, the oneself dynamically adjusts the purpose that interval time has reached the energy-conservation not underproduction simultaneously.

The accompanying drawing explanation

Fig. 1 is system framework figure of the present utility model;

Fig. 2 is control flow chart of the present utility model;

Fig. 3 is the not enough schematic diagram of oil well liquid-supplying;

Fig. 4 is the oil well standard indicator diagram.

Wherein, the 1-oil well condition detects integrated long-range indicator, the DSP data acquisition module of 2-integrated wireless communication function, 3-PLC controller, 4-frequency converter, 5-permagnetic synchronous motor.

Embodiment

Further describe the technical solution of the utility model below in conjunction with accompanying drawing, but that claimed scope is not limited to is described.

As Fig. 1, a kind of permagnetic synchronous motor direct-drive oil extractor controller, it comprises that oil well condition detects integrated long-range indicator 1, the DSP data acquisition module 2 of integrated wireless communication function, PLC controller 3 and frequency converter 4, wherein, the signal input part that oil well condition detects integrated long-range indicator 1 is connected with permagnetic synchronous motor 5 signal transducers for driving oil pumper, for gathering permagnetic synchronous motor 5 polished rod loads and displacement signal, the signal output part that oil well condition detects integrated long-range indicator 1 is connected with the DSP data acquisition module 2 of integrated wireless communication function by network, the output terminal of the DSP data acquisition module 2 of integrated wireless communication function is connected with the signal input part of PLC controller 3, the signal output part of PLC controller 3 is connected with the signal input part of frequency converter 4, frequency converter 4 has detection signal output terminal and control signal output terminal, wherein, the control signal output terminal is connected with permagnetic synchronous motor 5, the detection signal output terminal is connected with PLC controller 3.

As Fig. 2, a kind of permagnetic synchronous motor direct-drive oil extractor control method, it comprises following steps:

(1), signals collecting: oil well condition detects integrated long-range indicator 1 and gathers polished rod load and the displacement signal that can directly reflect oil well condition on permagnetic synchronous motor 5;

(2), signal transmission: utilize Radio Transmission Technology its signal to be sent to the DSP data acquisition module 2 of integrated wireless communication function;

(3), signal is processed and mode decision: the DSP data acquisition module 2 of integrated wireless communication function is after the digital signal that receives polished rod load and displacement, calculate the area of the load-position diagram of a jig frequency, and the load-position diagram area gathered during by the area of the load-position diagram of this jig frequency and the oil pumping of this oil well standard is contrasted, judge liquid level situation in oil well according to the ratio of area disappearance, thereby judgement oil pumper control model, wherein, when the actual load-position diagram area value recorded is greater than 80% of standard area, carry out the normal control model of oil pumper; If the load-position diagram area value recorded actual is less than 60% of standard area, and the oil pumper slow running is controlled or shutdown mode; If during between, take out control model between execution;

In a jig frequency, oil well condition detects integrated long-range indicator 1 can gather 200 groups of 2-D datas (displacement and load signal), forms load-position diagram.Utilize formula (1) to calculate the load-position diagram area of a jig frequency

$S=\underset{x\→\∞}{\lim }\underset{i=0}{\overset{n-1}{\mathrm{\Σ}}}(P_i^u-P_i^l)(X_{i+1}-X_i)---\left(1\right)$

In formula

Be respectively the transverse and longitudinal coordinate of load-position diagram up-down stroke, n is sample frequency.

The load-position diagram area of some jig frequencies that Fig. 3 is real-time online calculating, known with the oil well standard indicator diagram contrast of Fig. 4, when the oil pumper down stroke, lower right-most portion area disappearance appears in load-position diagram, explanation causes low on fuel in oil well pump, the control model of taking out between at this moment needing to take because oil well liquid level descends.

(4), execution pattern order: wherein, while being judged as normal control model, repeat above step; While being judged as slow running control or shutdown mode, the DSP data acquisition module 2 transmission slow runnings controls of integrated wireless communication function or stop instruction are to PLC controller 3, PLC controller 3 is sent to frequency converter 4 by its signal, and then frequency converter 4 frequency conversions make permagnetic synchronous motor 5 slow runnings or shutdown; While being judged as a pumping mode formula; between sending, the DSP data acquisition module 2 of integrated wireless communication function takes out instruction to PLC controller 3; PLC controller 3 is sent to frequency converter 4 by its signal; then frequency converter 4 frequency conversions make permagnetic synchronous motor 5 reductions of speed or shutdown; the requirement of taking out between meeting, thus the running status of oil pumper is controlled in realization.

Claims (1)

1. a permagnetic synchronous motor direct-drive oil extractor controller, it is characterized in that: it comprises that oil well condition detects integrated long-range indicator (1), the DSP data acquisition module (2) of integrated wireless communication function, PLC controller (3) and frequency converter (4), wherein, the signal input part that oil well condition detects integrated long-range indicator (1) is connected with permagnetic synchronous motor (5) signal transducer for driving oil pumper, for gathering permagnetic synchronous motor (5) polished rod load and displacement signal, the signal output part that oil well condition detects integrated long-range indicator (1) is connected with the DSP data acquisition module (2) of integrated wireless communication function by network, the output terminal of the DSP data acquisition module (2) of integrated wireless communication function is connected with the signal input part of PLC controller (3), the signal output part of PLC controller (3) is connected with the signal input part of frequency converter (4), frequency converter (4) has detection signal output terminal and control signal output terminal, wherein, the control signal output terminal is connected with permagnetic synchronous motor (5), the detection signal output terminal is connected with PLC controller (3).

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