Testing system for frequency conversion speed regulation control device of water injection pump driven by high-power permanent magnet motor

Abstract

The utility model discloses a test system for a frequency conversion speed regulation control device of a water injection pump driven by a high-power permanent magnet motor. Comprising a to-be-tested frequency converter, a four-quadrant frequency converter, a permanent magnet synchronous motor, a torquemeter, a feedback unit, a power distribution cabinet, a control cabinet, a transformer cabinet, a power supply cabinet, a pump frequency converter cabinet, a water storage tank, a frequency converter test bench, an F1000 water injection pump test line, a piano-type control cabinet, a test substation and the like. Through the piano-type control cabinet, a 220kW frequency converter to be tested and a four-quadrant frequency converter control and drive the twin-trawling permanent magnet synchronous motor, function tests of output voltage, current, rotating speed indexes, torque indexes and the like of the frequency converter to be tested are completed, a 800kW frequency converter is controlled to drive a water injection pump to complete index tests of power, efficiency, rotating speed, torque, pressure and the like, and real-time observation, monitoring and measurement are achieved. Potential problems and defects can be found or pre-judged in time, and targeted improvement is carried out.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor speed regulation control, and particularly relates to a test system for a variable frequency speed regulation control device of a high-power permanent magnet motor-driven water injection pump (220kW and 800kW test systems) and a control method thereof. Background Art

[0002] With the continuous development of modern industry and technology, especially in industries such as oil and gas extraction, hydropower generation, chemical industry, and metallurgy, the demand for high-power water injection pumps is indeed increasing. In recent decades, in order to implement energy conservation and consumption reduction, scientific research personnel have carried out a large amount of research work on motor variable frequency speed regulation technology.

[0003] To meet these requirements, water injection pump manufacturers and R & D institutions are constantly carrying out technological innovation and product upgrading. By adopting more advanced motor technology, more optimized pump body design, more intelligent control systems, etc., to improve the performance of water injection pumps, reduce energy consumption, and improve reliability and stability. Among them, the most common is to use the form of a permanent magnet synchronous motor directly driving the water injection pump instead of an asynchronous motor driving the water injection pump through a pulley, and adopt the sensorless vector control technology, which greatly improves the stability and reliability of the system, and realizes energy conservation and consumption reduction. However, after the R & D of the variable frequency device-driven water injection pump system is completed by water injection pump manufacturers and R & D institutions, most of them are asynchronous motor test systems, and it is impossible for R & D personnel to continuously optimize, adjust, modify the control program and design according to the prototype evaluation results, and ensure that the power performance, economy, and control stability of the drive system reach the design goals.

[0004] Therefore, in view of the above technical problems, it is necessary to develop a test system for a variable frequency speed regulation control device of a permanent magnet motor-driven water injection pump to realize problems such as testing, evaluation, acceptance of a high-power permanent magnet motor variable frequency speed regulation control device, and factory testing after small batch production. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the deficiencies of the prior art and propose a test system for a variable frequency speed regulation control device of a high-power permanent magnet motor-driven water injection pump, which can solve problems such as testing, evaluation, acceptance of a high-power variable frequency speed regulation control device, and factory testing after small batch production.

[0006] The technical solution adopted by the utility model is: a test system for a variable frequency speed regulation control device of a high-power permanent magnet motor-driven water injection pump, including a test control room, a to-be-tested frequency converter, a four-quadrant frequency converter, a permanent magnet synchronous motor, a torque meter, a feedback unit, a power distribution cabinet, a control cabinet, a transformer cabinet, a power supply cabinet, a pump frequency converter, a water storage tank, a frequency converter test bench, an F1000 water injection pump test line, a console control cabinet, a test substation;

[0007] Inside the test control room, there is a console-type control cabinet, which includes an industrial computer, a computer component, and a communication module; the console-type control cabinet is connected to the to-be-tested frequency converter, four-quadrant frequency converter, feedback unit, power distribution cabinet, control cabinet, transformer cabinet, power supply cabinet, and pump frequency converter;

[0008] On one side of the test control room is a test substation, which includes an incoming line cabinet, an active power filter cabinet, an outgoing line cabinet, a test transformer, and a switch cabinet arranged horizontally in sequence;

[0009] In the direction perpendicular to the test control room, the to-be-tested frequency converter, four-quadrant frequency converter, feedback unit, power distribution cabinet, control cabinet, transformer cabinet, power supply cabinet, pump frequency converter, and water storage tank are placed horizontally in sequence; the incoming line ends of the to-be-tested frequency converter and four-quadrant frequency converter are connected to the 380V power distribution cabinet, the power supply cabinet is connected to the test substation, the control cabinet, transformer cabinet, power supply cabinet, and pump frequency converter are connected to each other, and the feedback unit is connected to the four-quadrant frequency converter through a cable;

[0010] Opposite the test control room, there is a 220kW frequency converter test bench. On the test bench, two 220kW permanent magnet synchronous motors are installed centered. The two permanent magnet synchronous motors are butted through a coupling. One permanent magnet synchronous motor is used as a load motor, and one permanent magnet synchronous motor is used as a to-be-tested motor. The load motor is connected to the four-quadrant frequency converter through a cable, and the to-be-tested motor is connected to the to-be-tested frequency converter. The torque meter is installed on the coupling, and the torque meter is connected to the console-type control cabinet through a control line;

[0011] On one side of the 220kW permanent magnet synchronous motor, there is an F1000 injection pump test line. The F1000 injection pump test line includes an 800kW permanent magnet synchronous motor, an F1000 injection pump, and a water cooling device for cooling. The output end of the pump frequency converter is connected to the 800kW permanent magnet synchronous motor.

[0012] Furthermore, the console-type control cabinet is respectively connected to an external dual-range torque sensor, a flow meter, a pressure sensor, and three-way temperature sensors through an integrated control line; the flow meter is located in the inlet pipe of the F1000 injection pump, the pressure sensor is located in the inlet pipe of the F1000 injection pump, the external dual-range torque sensor is installed on the coupling where the two 220kW permanent magnet synchronous motors are butted, and two of the three-way temperature sensors are installed in the inlet and outlet pipes of the F1000 injection pump, and one is installed inside the pump frequency converter.

[0013] Furthermore, the switch cabinet adopts the method of cable entering from the bottom and exiting from the bottom.

[0014] Furthermore, there is a safety passage beside the test substation. On the side of the test substation close to the safety passage, transparent explosion-proof glass is configured for easy observation of the internal situation.

[0015] Furthermore, the frequency converter test bench is a cast iron platform, which fully ensures flatness. The load motor and the motor to be tested are centered and assembled here.

[0016] Furthermore, the water cooling device and the water storage tank are both located on the water injection pump at the production site.

[0017] Furthermore, a position encoder is connected to the end of the load motor for speed testing and is connected to the four-quadrant frequency converter through a signal line.

[0018] The utility model takes the F1000 water injection pump test line and the 220kW test bench as the core to realize the frequency conversion speed control device and the water injection pump test, evaluation, acceptance, and small-batch post-production factory test. The F1000 water injection pump test line drives the water injection pump to complete the tests of indicators such as power, efficiency, speed, torque, and pressure. The 220kW test bench completes the function tests of the output voltage, current, speed index, torque index, and other test items of the frequency converter to be tested, observes, monitors, and measures in real time, discovers or anticipates potential problems and defects in a timely manner, and makes targeted improvements and enhancements to ensure that the performance indicators of the frequency converter and the water injection pump meet the requirements, the overall safety and reliability are ensured, so as to ensure that it can work stably and reliably during the on-site working process, improve the reliability and safety of the device, improve the overall automation degree of the test system, and effectively ensure the frequency conversion speed control and high-reliability operation of the permanent magnet motor of the water injection pump.

[0019] Beneficial effects: The utility model provides a test system for a frequency conversion speed control device of a water injection pump driven by a high-power permanent magnet motor, which can provide tests, evaluations, acceptances, and small-batch post-production factory tests for a 220kW frequency conversion speed control device of a permanent magnet synchronous motor and an 800kW water injection pump. It realizes the advantages of high automation degree, compact structure, and easy implementation of the test system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of a test system for a frequency conversion speed control device of a water injection pump driven by a high-power permanent magnet motor of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions of the utility model will be described in detail below in conjunction with the drawings and specific embodiments:

[0022] As Figure 1 shown, a test system for a frequency conversion speed control device of a water injection pump driven by a high-power permanent magnet motor includes a test control room, a frequency converter to be tested, a four-quadrant frequency converter, a permanent magnet synchronous motor, a torque meter, a feedback unit, a power distribution cabinet, a control cabinet, a transformer cabinet, a power supply cabinet, a pump frequency converter, a water storage tank, a frequency converter test bench, an F1000 water injection pump test line, a console control cabinet, and a test substation;

[0023] Inside the test control room, there is a console-type control cabinet, which includes an industrial computer, a computer component, and a communication module; the console-type control cabinet is connected to the to-be-tested frequency converter, four-quadrant frequency converter, feedback unit, power distribution cabinet, control cabinet, transformer cabinet, power supply cabinet, and pump frequency converter.

[0024] The console-type control cabinet is respectively connected to the to-be-tested frequency converter, four-quadrant frequency converter, torque meter, pump frequency converter, position encoder, and temperature sensor through weak-current wiring ducts, and the to-be-tested frequency converter is connected to the 220kW permanent magnet synchronous motor under test on the test bench through a strong-current wiring duct, the four-quadrant frequency converter is connected to the 220kW permanent magnet synchronous motor of the load on the test bench through a strong-current wiring duct, the pump frequency converter is connected to the 800kW permanent magnet synchronous motor through a strong-current wiring duct, and the power supply cabinet is connected to the test substation through a bridge wiring.

[0025] The industrial computer displays the collected signals on the computer component through a temperature, flow, and pressure signal acquisition and conversion module, and the test data is displayed and recorded in real time through the computer component, which reflects a high degree of integration, improves the overall automation level of the test system, and effectively ensures the variable-frequency speed regulation energy-saving control and high-reliability operation of the permanent magnet motor of the injection pump.

[0026] The console-type control cabinet is respectively connected to an external dual-range torque sensor, a flow meter, a pressure sensor, and three-way temperature sensors through integrated control lines; the flow meter is located in the inlet pipe of the F1000 injection pump, the pressure sensor is located in the inlet pipe of the F1000 injection pump, the external dual-range torque sensor is installed on the coupling connecting two 220kW permanent magnet synchronous motors, and two of the three-way temperature sensors are installed in the inlet and outlet pipes of the F1000 injection pump, and one is installed inside the pump frequency converter.

[0027] On one side of the test control room is a test substation, which includes a transformer with an input voltage of 0.4kV. The power supply is taken from the existing power distribution cabinet in the underground power room of the forging workshop and is laid to the machining workshop through a newly installed bridge, and it can output voltages of 0.66kV, 1.14kV, and 3.3kV. Inside the test substation, there are a line inlet cabinet, an active power filter cabinet, an outgoing line cabinet, a test transformer, a 0.66kV switch cabinet, a 1.14kV switch cabinet, and two 3.3kV switch cabinets arranged horizontally in sequence. The switch cabinets adopt the method of cable entering from the bottom and exiting from the bottom.

[0028] There is a safety passage beside the test substation. On the side of the test substation close to the safety passage, transparent explosion-proof glass is configured for easy observation of the internal situation.

[0029] The to-be-tested frequency converter, four-quadrant frequency converter, feedback unit, power distribution cabinet, control cabinet, transformer cabinet, power supply cabinet, pump frequency converter, and water storage tank are horizontally arranged in sequence in the direction perpendicular to the test control room, reducing the lengths of signal lines and cables and avoiding affecting the control and test accuracy; the incoming line ends of the to-be-tested frequency converter and four-quadrant frequency converter are connected to the 380V power distribution cabinet, the power supply cabinet is connected to the test substation to obtain 1140V voltage, the control cabinet, transformer cabinet, power supply cabinet, and pump frequency converter are connected to each other, and the feedback unit is connected to the four-quadrant frequency converter through a cable.

[0030] A 220kW frequency converter test bench is placed opposite the test control room. Two 220kW permanent magnet synchronous motors are centrally installed on the upper surface of the frequency converter test bench. The two permanent magnet synchronous motors are butted through a coupling. One permanent magnet synchronous motor is used as a load motor, and one permanent magnet synchronous motor is used as the to-be-tested motor. The load motor is connected to the four-quadrant frequency converter through a cable, and the to-be-tested motor is connected to the to-be-tested frequency converter. The output voltage is changed by adjusting the frequency. The torque meter is installed on the coupling, and the torque meter is connected to the piano-type control cabinet through a control line to realize the acquisition of torque signals. A position encoder is connected to the end of the load motor for speed testing and is connected to the four-quadrant frequency converter through a signal line.

[0031] The frequency converter test bench is a cast iron platform. 22mm sliding holes convenient for bolt fixation are designed according to the fixed hole positions of the 220kW permanent magnet synchronous motors. To prevent vibration, a cast iron platform with a length of 3000mm, a width of 1500mm, a height of 200mm, and a weight of about 5t is designed to fully ensure flatness. The load motor and the to-be-tested motor complete the centering assembly here.

[0032] An F1000 water injection pump test line is placed on one side of the 220kW permanent magnet synchronous motor. The F1000 water injection pump test line includes 1 800kW permanent magnet synchronous motor, 1 F1000 water injection pump, and 1 water cooling device for cooling.

[0033] The input end of the four-quadrant frequency converter is connected to the 380V power grid end. It includes a 250kW ABB frequency converter, a feedback unit, and a power cabinet. The output side is connected to the load motor, which can realize the loading of the load motor and can convert the mechanical energy of the motor into electrical energy through the feedback unit during the test and feed it back to the power grid through the power distribution cabinet. Then, through the power distribution cabinet, the fed-back electrical energy drives the to-be-tested frequency converter through the to-be-tested frequency converter, greatly improving the energy utilization rate. Performance tests under various different working conditions such as no-load, full-load, sudden load application, and sudden load removal of the to-be-tested frequency converter can be realized; on the other hand, signals such as output torque, speed, power, and current are connected to the piano-type control cabinet to realize the control of the load motor and the reading of test information, and the torque of the load motor is adjusted by changing the frequency to meet different working condition requirements.

[0034] The output end of the frequency converter for the pump is connected to an 800 kW permanent magnet synchronous motor. The 800 kW permanent magnet synchronous motor is the main drive of the water injection pump. The frequency converter converts the power frequency voltage with a fixed frequency of the power grid into a voltage with adjustable frequency. The frequency converter to be tested and the four-quadrant frequency converter are respectively connected to 220 kW permanent magnet synchronous motors on two test benches. The water cooling device and the water storage tank are both located on the water injection pump at the production site.

[0035] A test system for a variable frequency speed regulation control device of a water injection pump driven by a high-power permanent magnet motor realizes the functions of testing, evaluating, accepting, and small-batch post-production factory testing of a 220 kW frequency converter driving a permanent magnet synchronous motor and an 800 kW permanent magnet synchronous motor driving a water injection pump, improves the automation level of the test system, and has the advantages of compact structure and easy implementation.

[0036] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. A high-power permanent magnet motor driven water injection pump variable frequency speed control device test system, characterized in that: Including test control room, inverter to be tested, four-quadrant inverter, permanent magnet synchronous motor, torque meter, feedback unit, power distribution cabinet, control cabinet, transformer cabinet, power supply cabinet, pump inverter, water storage tank, inverter test bench, F1000 water injection pump test line, piano-type control cabinet, test substation; The test control room is equipped with a piano-style control cabinet, which includes an industrial computer, computer components and a communication module; the piano-style control cabinet is connected to the inverter to be tested, the four-quadrant inverter, the feedback unit, the power distribution cabinet, the control cabinet, the transformer cabinet, the power supply cabinet, and the pump inverter; On one side of the test control room is a test substation, which includes an incoming line cabinet, an active filter cabinet, an outgoing line cabinet, a test transformer and a switch cabinet arranged horizontally in sequence; The inverter to be tested, the four-quadrant inverter, the feedback unit, the power distribution cabinet, the control cabinet, the transformer cabinet, the power supply cabinet, the pump inverter and the water tank are placed horizontally in sequence perpendicular to the direction of the test control room; the inverter to be tested and the four-quadrant inverter inlet terminals are connected to the 380V power distribution cabinet, the power supply cabinet is connected to the test substation, the control cabinet, the transformer cabinet, the power supply cabinet and the pump inverter are connected to each other, and the feedback unit is connected to the four-quadrant inverter through a cable; A 220kW inverter test bench is placed opposite the test control room. Two 220kW permanent magnet synchronous motors are installed in the center of the inverter test bench. The two permanent magnet synchronous motors are connected through a coupling. One permanent magnet synchronous motor is used as a load motor, and the other permanent magnet synchronous motor is used as a motor to be tested. The load motor is connected to the four-quadrant inverter through a cable, and the motor to be tested is connected to the inverter to be tested. The torque meter is installed on the coupling, and the torque meter is connected to the piano-type control cabinet through a control line; An F1000 water injection pump test line is placed on one side of the 220kW permanent magnet synchronous motor. The F1000 water injection pump test line includes an 800kW permanent magnet synchronous motor, an F1000 water injection pump and a water cooling device for cooling. The output end of the pump inverter is connected to the 800kW permanent magnet synchronous motor.

2. The high-power permanent magnet motor driven water injection pump variable frequency speed control device test system according to claim 1 is characterized in that: The piano-style control cabinet is connected to an external dual-range torque sensor, a flow meter, a pressure sensor, and a three-way temperature sensor through an integrated control circuit; the flow meter is located at the water inlet pipe of the F1000 water injection pump, the pressure sensor is located at the water inlet pipe of the F1000 water injection pump, the external dual-range torque sensor is installed on the coupling of two 220kW permanent magnet synchronous motors, two of the three temperature sensors are installed at the inlet and outlet pipes of the F1000 water injection pump, and one is installed in the pump frequency converter.

3. The high-power permanent magnet motor driven water injection pump variable frequency speed control device test system according to claim 1 is characterized in that: The switch cabinet adopts the mode that the cable enters from below and appears from below.

4. The high-power permanent magnet motor driven water injection pump variable frequency speed control device test system according to claim 1 is characterized in that: There is a safety passage next to the test substation, and transparent explosion-proof glass is arranged on the side of the test substation close to the safety passage.

5. The high-power permanent magnet motor driven water injection pump variable frequency speed control device test system according to claim 1 is characterized in that: The frequency converter test bench is a cast iron platform.

6. The high-power permanent magnet motor driven water injection pump variable frequency speed control device test system according to claim 1 is characterized in that: The water cooling device and the water storage tank are both located on the water injection pump at the production site.

7. The high-power permanent magnet motor driven water injection pump variable frequency speed control device test system according to claim 1 is characterized in that: The end of the load motor is connected to a position encoder, which is connected to the four-quadrant frequency converter through a signal line.

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