Pumping unit redundant energy recycling simulation test platform and test method thereof

Abstract

The invention discloses a pumping unit redundant energy cyclic utilization simulation test platform and a test method thereof.The test platform is composed of a rectifier bridge, an upper computer, an inverter and a motor, firstly, actually-measured pumping unit electric quantity parameters are input into an upper computer test system, the upper computer converts the input parameters into information such as operation time, torque and rotating speed through software calculation, and the information is sent to the inverter; the information is issued to an inverter through communication, then the inverter controls the motor to load, and the load torque generated by the motor is transmitted to a tested object oil pumping unit motor through a speed reducer and an inertia load, so that the process of acting of the oil pumping unit and the process of generating redundant energy are simulated, and a redundant energy recycling device is connected to a direct-current bus interface of a test platform. And the energy-saving effect can be evaluated. Compared with evaluation on pumping unit equipment working on an oil well site, the method has the advantages of low test cost, high safety and no need of well shutdown.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pumping unit simulation test, in particular to a pumping unit redundant energy recycling simulation test platform and a test method thereof. BACKGROUND

[0002] The pumping unit is one of the main energy-consuming equipment in oilfield production. In dynamic production, the motor of the pumping unit is dragged to generate redundant energy. Although the pumping unit has a balance adjustment measure to reduce redundant energy, the released energy after the balance block adjustment is a constant value, and the oil rod load is a variable dynamic value, so it is difficult to maintain 100% balance. The redundant energy not only causes energy waste, but also causes safety hazards of the electrical equipment of the pumping unit. Different principles of recycling devices are needed to recover and utilize the redundant energy on site, and the energy-saving effect of the recycling device needs to be evaluated.

[0003] The conventional evaluation method is to use the pumping unit installed on site for evaluation. Although this method is simple and intuitive, it needs to electrically connect the redundant energy recycling device with the pumping unit control cabinet, and install and construct on the oil well site, which needs to stop the pumping unit power and production. In addition to the safety hazards of construction and testing, it also has a certain impact on oilfield production. In addition, due to the large variation of liquid production and dynamic liquid level of production wells, the comparison of energy-saving test data is not accurate. Another method is to install a hydraulic simulation well for evaluation.

[0004] Publication (announcement) No. CN109682629B discloses a pumping unit simulation loading test bench. The transmission chain is rotated by driving the transmission chain through the lifting and lowering of the suspended weight block on the pumping unit. The main transmission sprocket and the main transmission shaft are not rotated with each other, the transmission chain drives the main transmission sprocket and the ratchet inner disc to rotate with the main transmission shaft, the ratchet outer disc and the ratchet inner disc form an intermittent mechanism, the rotation of the ratchet inner disc drives the ratchet outer disc and the transmission disc to rotate through the ratchet, the output shaft on the transmission disc rotates in the center of the electromagnetic damper, and different damping torques are generated in the electromagnetic damper in the process of lifting and lowering the suspended weight block on the pumping unit to generate load difference at the suspension point, so as to simulate the actual working condition of the pumping unit with different suspension point loads in the actual working condition of the pumping unit. The actual working condition can truly reflect the alternating load borne by the suspension point.

[0005] The prior art needs to cooperate with the full-size pumping unit for testing, which has the disadvantages of large space occupation and high investment cost.

[0006] Publication (announcement) number: CN109283002A, discloses a pumping unit load simulation test device, including control system, load simulation system, sliding damping platform and load guiding mechanism. The load simulation mechanism is provided by servo motor and magnetic powder brake, and the load size is adjusted by force sensor feedback. The damping force platform is provided with mold spring and linear slide rail assembly moving along the fixed guide rod, effectively reducing the fluctuation caused by instantaneous impact during equipment operation, improving the accuracy and sensitivity of system control load. The invention provides a digital pumping unit load simulation test device with torque control mode of servo motor and magnetic powder brake, which can more accurately and conveniently simulate various pumping conditions.

[0007] This prior art needs full-size pumping unit cooperation test, which has the disadvantages of large space occupation and high investment cost.

[0008] Publication (announcement) number: CN104948540A, discloses a beam pumping unit load simulation electro-hydraulic servo control device, including servo controller, pumping unit, displacement tension sensor, pressure sensor, flow sensor, adjustable elastic mechanism, energy accumulator, servo valve, energy accumulator safety valve group, pulley set, oil source, electromagnetic overflow valve and loading cylinder. The invention adopts electro-hydraulic servo control hydraulic drive mode to provide loading power for load simulator, hydraulic cylinder as an execution component, simulates the load of pumping unit, and controls its driving force, speed and position. This new simulator realizes the simulation of known dynamometer card under different well conditions, and can simulate various abnormal conditions such as load break and overload in the well alone, with fast response, high accuracy, and can realize the load simulation of beam pumping unit.

[0009] This prior art uses hydraulic mode to simulate load, which has the disadvantages of more hydraulic components and hydraulic oil leakage; and needs full-size pumping unit cooperation test, which has the disadvantages of large space occupation and high investment cost.

[0010] In summary, the technical solutions, technical problems to be solved and beneficial effects of the above disclosed technologies are different from those of the present invention. The above disclosed technology documents do not have technical inspiration for more technical features and technical problems to be solved of the present invention and beneficial effects. SUMMARY

[0011] In view of the above defects existing in the prior art, the purpose of the present application is to provide an oil pumping unit redundant energy recycling simulation test platform and a test method thereof, and to provide an oil pumping unit simulation test platform with short response time, accurate loading, and wide simulation working condition range of the oil pumping unit; the system is reliable without the oil leakage problem caused by the hydraulic simulation load device; the full-size oil pumping unit is replaced by the electrical and motor drive test platform, thereby reducing the occupied space, reducing the investment cost and experimental cost; and the oil pumping unit prototype simulation mode is not needed.

[0012] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0013] An oil pumping unit redundant energy recycling simulation test platform comprises a power supply, a first rectifier bridge and a second rectifier bridge connected with the power supply; a first inverter and a first motor are connected in sequence behind the first rectifier bridge; a second inverter and a second motor are connected in sequence behind the second rectifier bridge; the motor shaft of the first motor and the motor shaft of the second motor are connected through a speed reducer; the first inverter and the second inverter are connected with an upper computer; the second rectifier bridge is further connected with a measured device; the first motor is used for simulating the load of the oil pumping unit, and the second motor is used for simulating the motor of the oil pumping unit itself.

[0014] Further, the first rectifier bridge is a first diode rectifier bridge, and the second rectifier bridge is a second diode rectifier bridge.

[0015] Further, the first motor is a first three-phase alternating current asynchronous motor, and the second motor is a second three-phase alternating current asynchronous motor.

[0016] Further, the measured device is an oil pumping unit redundant energy recovery device.

[0017] Further, the first inverter and the second inverter are composed of three-phase IGBT inverter bridges.

[0018] In order to achieve the above purpose, the present application adopts the following technical solutions:

[0019] A test method of an oil pumping unit redundant energy recycling simulation test platform comprises the following steps:

[0020] S1, first, input the measured parameters of the oil pumping unit into the upper computer, convert the measured parameters into torque, time and speed instructions through internal operation of the upper computer software, send the instructions to the first inverter, and then drive the first motor to load through the first inverter, so as to transmit the load torque generated by the first motor to the second motor through the speed reducer;

[0021] Control the first inverter through the upper computer, and then provide the simulated load through the first motor;

[0022] S2, the host computer inputs the working parameters of the pumping unit, the host computer converts the stroke frequency and other parameters into working frequency and time and sends them to the second inverter, and the second inverter drives the second motor; when in the working state, the second motor drags the first motor;

[0023] When in the redundant energy state, the second motor is dragged by the first motor, and the generated redundant energy is fed back to the DC side through the second inverter;

[0024] The measured device is connected to the DC side, and two tests of adding and not adding the measured device are carried out to evaluate the effect of the energy recovery device.

[0025] Further, the first motor is a first three-phase alternating current asynchronous motor, the second motor is a second three-phase alternating current asynchronous motor, and the measured device is a pumping unit redundant energy recovery device;

[0026] When the pumping unit load is simulated, the three-phase power supply of the power grid is rectified into a DC voltage by a first diode rectifier bridge, and then the DC voltage is supplied to the first inverter, and the first inverter generates a three-phase variable frequency voltage to supply the first three-phase alternating current asynchronous motor;

[0027] When the pumping unit body is simulated, the three-phase power supply of the power grid is rectified into a DC voltage by a second diode rectifier bridge, and then the DC voltage is supplied to the second inverter, and the second inverter generates a three-phase variable frequency voltage to supply the second three-phase alternating current asynchronous motor.

[0028] Further, in S1, the oil well is measured by using the power quality analyzer, and the pump depth, stroke, stroke frequency, dynamic liquid level, liquid volume, oil volume, power consumption and power consumption data are obtained;

[0029] In S2, the working parameters of the working and redundant energy state of the simulated pumping unit operation process are working time, feedback time, stroke frequency, working power and redundant energy power;

[0030] The test finally obtains the hourly power consumption without the pumping unit redundant energy recovery device, the hourly power consumption with the pumping unit redundant energy recovery device and the power saving rate.

[0031] Further, the pumping unit redundant energy recovery device is installed on the oil well site, the oil well pumping unit is measured by using the power quality analyzer, and the measurement data is compared with the simulation data to verify the accuracy of the simulation test.

[0032] Further, the oil well pumping unit or the belt conveyor pumping unit is measured by using the power quality analyzer.

[0033] Compared with the prior art, the present application has the following beneficial effects:

[0034] 1. Compared with evaluation on pumping unit equipment working at oil well site, has the advantages of low test cost, high safety and no need to stop well.

[0035] 2. Compared with moving pumping unit prototype machine to indoor, and dragging mechanical simulation load by mechanical way through the prototype machine, has the characteristics of small floor space, low investment cost and flexible test mode.

[0036] 3. The application simulates different working states of the pumping unit by setting working parameters on the host computer, and has the characteristics of flexible parameter setting and convenient operation.

[0037] 4. The application realizes simulation of the pumping unit body by power electronic devices and three-phase alternating current asynchronous motor, has small floor space, low cost and flexible parameter adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 is a structural schematic diagram of a pumping unit redundant energy recycling simulation test platform of the application;

[0039] Figure 2 is a motor connection structure schematic diagram of a pumping unit redundant energy recycling simulation test platform of the application;

[0040] In the figure: 1, a diode rectifier bridge; 2, a inverter; 3, a three-phase alternating current asynchronous motor; 4, a diode rectifier bridge; 5, a speed reducer; 6, a three-phase alternating current asynchronous motor; 7, a inverter; 8, a host computer. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, not all. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0042] Embodiment 1:

[0043] Please refer to Figures 1 to 2 , the application provides a pumping unit redundant energy recycling simulation test platform, which comprises a diode rectifier bridge 1, an inverter 2, a three-phase alternating current asynchronous motor 3, a diode rectifier bridge 4, a speed reducer 5, a three-phase alternating current asynchronous motor 6, an inverter 7 and a host computer 8.

[0044] The first diode rectifier bridge 1 and the second diode rectifier bridge 4 are connected with the power grid, the first inverter 2 connects the first diode rectifier bridge 1 with the first three-phase AC asynchronous motor 3, the second inverter 7 connects the second diode rectifier bridge 4 with the second three-phase AC asynchronous motor 6, the speed reducer 5 connects the motor shaft of the first three-phase AC asynchronous motor 3 with the motor shaft of the second three-phase AC asynchronous motor 6, and the upper computer 8 is connected with the first inverter 2 and the second inverter 7 respectively.

[0045] The second diode rectifier bridge 4 is also connected with the measured device, and the measured device is an energy recovery device of a pumping unit.

[0046] Specifically, the first diode rectifier bridge 1 and the second diode rectifier bridge 4 are used to convert three-phase alternating current into direct current to provide a direct current power supply for the inverter.

[0047] Specifically, the first inverter 2 and the second inverter 7 are both composed of a three-phase IGBT inverter bridge, which can convert direct current into alternating current of different frequencies and is used to drive a three-phase AC asynchronous motor.

[0048] Specifically, the first three-phase AC asynchronous motor 3 is used to simulate the load of a pumping unit, and the second three-phase AC asynchronous motor 6 is used to simulate the motor of the pumping unit itself.

[0049] Specifically, the speed reducer 5 is used to reduce the rotating speed of the motor, improve the output torque, and also serves as a connection between the two motors.

[0050] Specifically, the upper computer 8 is used to set the control parameters of the pumping unit energy recycling simulation test platform and send command signals to the first inverter 2 and the second inverter 7 through a 485 bus, and the upper computer 8 is also responsible for monitoring the current, voltage, motor torque and rotating speed of the first inverter 2 and the second inverter 7.

[0051] It should be noted that the first diode rectifier bridge 1, the first inverter 2, the first three-phase AC asynchronous motor 3, the second diode rectifier bridge 4, the speed reducer 5, the second three-phase AC asynchronous motor 6, the second inverter 7, the upper computer 8 and the energy recovery device of the pumping unit are all prior art, and the innovation of the present application lies in combining them together.

[0052] S1, pumping unit load simulation: the three-phase power supply of the power grid is rectified into direct current voltage by the first diode rectifier bridge 1, and then the direct current voltage is supplied to the first inverter 2, and the first inverter 2 generates three-phase variable frequency voltage to supply the first three-phase AC asynchronous motor 3;

[0053] The first inverter 2 is controlled by the upper computer 8, and the simulated load is provided by the first three-phase AC asynchronous motor 3;

[0054] First, the pumping unit measured parameters: redundant energy generation time, work time, work power, redundant power and other data input to the host computer 8, through the host computer 8 software internal operation will be measured parameters into torque, time, speed instruction sent to the inverter 2, then by the inverter 2 drive a three-phase asynchronous motor 3 load, the load torque generated by the three-phase asynchronous motor 3 through the reducer 5 to the second three-phase asynchronous motor 6;

[0055] S2, pumping unit simulation: grid three-phase power supply after the second diode bridge rectifier 4 into a DC voltage, supply to the second inverter 7 DC voltage, the inverter 7 generated three-phase frequency conversion voltage supply to the second three-phase asynchronous motor 6;

[0056] In the host computer 8 input pumping unit stroke parameters, the host computer 8 will be converted into stroke parameters such as working frequency, time sent to the second inverter 7, then by the second inverter 7 drive the second three-phase asynchronous motor 6, in the work state, the second three-phase asynchronous motor 6 drag a three-phase asynchronous motor 3, in the redundant state, the second three-phase asynchronous motor 6 is dragged by a three-phase asynchronous motor 3, the redundant energy generated by the feedback to the DC side through the second inverter 7, the measured device is connected with the DC side, so as to achieve the effect of evaluating the energy recovery device, the measured device is pumping unit redundant energy recovery device.

[0057] Example 2:

[0058] The pumping unit redundant energy recycling simulation test platform provided by the application can evaluate the energy recovery device.

[0059] P1, through the test platform to simulate the pumping unit operation process of doing work and redundant energy state, test data as follows:

[0060] Table 1 test platform test data

[0061]

[0062] P2, test process;

[0063] The measured device, i.e. pumping unit redundant energy recovery device, is connected to the DC bus end of the second inverter 7, according to table 1, test 1-4 respectively, input the test data to the host computer 8 control software, the host computer 8 transmits the test data to the inverter, and the inverter drives the three-phase asynchronous motor to rotate; Figure 1 The power consumption of the pumping unit body three-phase grid side before and after the redundant energy recovery device is installed is measured by the power quality testing device, and the power saving rate of the redundant energy recovery device is calculated according to the test results; the test results are shown in table 2.

[0064] The power consumption of the pumping unit body three-phase grid side before and after the redundant energy recovery device is installed is measured by the power quality testing device, and the power saving rate of the redundant energy recovery device is calculated according to the test results; the test results are shown in table 2.

[0065] Table 2 Evaluation results of the redundant energy recycling device under different test conditions

[0066]

[0067]

[0068] As can be seen from Table 2, the power-saving device has different power-saving rates under different stroke and power conditions.

[0069] Example 3:

[0070] The simulation test platform for the pumping unit redundant energy recycling provided by the present application is used to simulate the working condition of Well A in Shengli Oilfield, and Well A is a beam pumping unit.

[0071] A1, the power quality analyzer is used to measure the data such as the alternating current side power and current of the pumping unit of Well A, and the recording time is 1 day, and the data are shown in Table 3;

[0072] Table 3 Working condition of Well A without the redundant energy recycling device

[0073]

[0074]

[0075] A2, the test input data of the simulation test platform are obtained according to the working condition data of Well A, the data in Table 4 are input into the upper computer 8, and the running condition of Well A is simulated;

[0076] Table 4 Test data of the test platform

[0077] Parameter A well operating data Work time (sec) 10 Feedback time (sec) 7.1 Stroke frequency (times / min) 3.5 Work power (KW) 7.5 Surplus power (KW) 2.2

[0078] The measured device, i.e., the pumping unit redundant energy recycling device, is connected to the DC bus end of the second inverter 7 according to the attached Figure 1 The test data are input into the control software of the upper computer 8, the upper computer 8 transmits the test data to the inverter, and the inverter drives the three-phase asynchronous motor to rotate;

[0079] The power consumption of the three-phase power grid side of the pumping unit before and after the redundant energy recycling device is measured by the power quality test device, and the power-saving rate of the redundant energy recycling device is calculated according to the test results; the test results are shown in Table 5;

[0080] Table 5 Evaluation results of the simulation Well A test platform with the redundant energy recycling device

[0081]

[0082]

[0083] A3, in order to further verify the pumping unit redundant energy recycling simulation test platform to the evaluation accuracy of the redundant energy recycling device, the redundant energy recycling device is installed to A well site, the electric energy quality analyzer is used to measure the electric quantity, current and other data of the pumping unit alternating current side of A well, the recording time is 1 day, and the data is as shown in table 6;

[0084] Table 6 Evaluation results after installing the redundant energy recycling device on the A well site

[0085] Type Oil beam machine Pump depth (m) 1200 Stroke (m) 3.75 Stroke frequency (times / min) 3.68 Dynamic liquid level (m) 49 Liquid volume (t) 72.5 Oil volume (%) 2.5 Power consumption (kWh / d) 86.4 Power consumption (kWh / h) 3.6 Power saving rate (%) 32

[0086] A4, test results: by comparing table 6 with table 5, the redundant energy recycling device has a power saving rate of 34.5% in the simulation test platform test, and a power saving rate of 32% in the A well site test, because the pumping unit load working process power and current have nonlinear, fluctuation characteristics, and the simulation test platform has certain error. Through embodiment 3, the pumping unit redundant energy recycling simulation test platform of the present application can simulate the actual working condition of the pumping unit on site by inputting the beam pumping unit well working condition data into the upper computer 8, has the advantages of flexible test parameters, small occupied space and low test cost.

[0087] Embodiment 4:

[0088] The pumping unit redundant energy recycling simulation test platform provided by the present application is used for simulating the working condition of B well in Shengli oilfield, and B well is a belt conveyor.

[0089] B1, the electric energy quality analyzer is used to measure the electric quantity, current and other data of the pumping unit alternating current side of B well, the recording time is 1 day, and the data is as shown in table 7;

[0090] Table 7 Working condition of B well without installing redundant energy recycling device

[0091] Type Belt machine Pump depth (m) 1500 Stroke (m) 4.6 Stroke frequency (times / min) 5.92 Dynamic liquid level (m) 49 Liquid volume (t) 97.62 Oil volume (%) 1.8 Power consumption (kWh / d) 119 Power consumption (kWh / h) 4.95

[0092] B2, the test input data of the simulation test platform is obtained according to the working condition data of B well, the data in table 8 is input into the upper computer 8, and the running condition of B well is simulated;

[0093] Table 8 Test platform test data

[0094]

[0095]

[0096] The test results are as shown in table 9;

[0097] Table 9 Evaluation results of the simulation B well test platform with the redundant energy recycling device

[0098]

[0099] B3, in order to further verify the pumping unit redundant energy recycling simulation test platform for the evaluation accuracy of the redundant energy recycling device, the redundant energy recycling device is installed to the B well site, the power quality analyzer is used to measure the B well pumping unit AC side power, current and other data, the recording time is 1 day, and the data are as shown in Table 10;

[0100] Table 10 Evaluation results after installing the redundant energy recycling device on the B well site

[0101]

[0102]

[0103] B4, test results: by comparing Table 10 with Table 9, the redundant energy recycling device has a power saving rate of 28.9% in the simulation test platform test, and a power saving rate of 27.3% in the B well site test, and due to the nonlinear and fluctuating characteristics of the pumping unit load working process power and current, the simulation test platform has certain errors. Through embodiment 4, the pumping unit redundant energy recycling simulation test platform of the present application can simulate the actual working condition of the pumping unit on site by inputting the belt conveyor pumping well working condition data into the upper computer 8, and has the advantages of flexible test parameters, small occupied space and low test cost.

[0104] In the present application, the parts themselves that are not discussed in detail, and the connection modes of the parts in the present application all belong to the known technology in the technical field. Direct application can be used, and no further description is given.

[0105] In the present application, the term "a plurality of" refers to two or more, unless otherwise explicitly limited. The terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, "connecting" can be fixed connection, or detachable connection, or integral connection; "connecting" can be direct connection, or indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0106] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or units referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0107] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "certain embodiments", and the like is intended to indicate that the described implementation, feature, structure, material or characteristic is included in at least one embodiment or example of the application. The illustrative representations of the above terms in the specification are not necessarily referring to the same embodiment or example. Moreover, the described implementation, feature, structure, material or characteristic can be combined in any one or more embodiments or examples in a suitable manner.

[0108] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A simulation test platform for redundant energy recycling of oil pumping units, including a power supply, characterized in that: It also includes a No. 1 rectifier bridge and a No. 2 rectifier bridge connected to a power supply; The first rectifier bridge is connected in sequence to the first inverter and the first motor; The second rectifier bridge is connected in sequence to the second inverter and the second motor; The motor shaft of the first motor is connected to the motor shaft of the second motor via a reducer; The first inverter and the second inverter are both connected to the host computer; The second rectifier bridge is also connected to the device under test; The No. 1 motor is used to simulate the load of the oil pumping unit, and the No. 2 motor is used to simulate the motor of the oil pumping unit itself.

2. A simulation test platform for recycling redundant energy of an oil pumping unit according to claim 1, characterized in that: The No. 1 rectifier bridge is a No. 1 diode rectifier bridge, and the No. 2 rectifier bridge is a No. 2 diode rectifier bridge.

3. The simulation test platform for recycling redundant energy of an oil pumping unit according to claim 1 is characterized in that: The No. 1 motor is a No. 1 three-phase AC asynchronous motor, and the No. 2 motor is a No. 2 three-phase AC asynchronous motor.

4. The simulation test platform for redundant energy recycling of oil pumping units according to claim 1 is characterized in that: The device under test is a redundant energy recovery device for an oil pumping unit.

5. The simulation test platform for redundant energy recycling of oil pumping units according to claim 1 is characterized in that: The first inverter and the second inverter are both composed of three-phase IGBT inverter bridges.

6. A test method for a simulation test platform for redundant energy recycling of pumping units, characterized in that: S1: First, the measured parameters of the pumping unit are input into the host computer. The host computer software converts the measured parameters into torque, time, and speed instructions through internal calculations and sends them to inverter No.

1. Inverter No. 1 then drives motor No. 1 to load the load, and the load torque generated by motor No. 1 is transmitted to motor No. 2 through the reducer; The host computer controls inverter No. 1, and motor No. 1 provides simulated load; S2. Input the operating parameters of the pumping unit into the host computer. The host computer converts the parameters such as the stroke rate into the operating frequency and time and sends them to the No. 2 inverter. The No. 2 inverter then drives the No. 2 motor. When in the working state, the No. 2 motor drives the No. 1 motor. When in redundant energy state, the No. 2 motor is driven by the No. 1 motor, and the generated redundant energy is fed back to the DC side through the No. 2 inverter; The device under test is connected to the DC side, and two tests are carried out with and without the device under test installed, so as to evaluate the effect of the energy recovery device.

7. The test method of a pumping unit redundant energy recycling simulation test platform according to claim 6, characterized in that: The No. 1 motor is a No. 1 three-phase AC asynchronous motor, and the No. 2 motor is a No. 2 three-phase AC asynchronous motor; the device under test is a redundant energy recovery device for an oil pumping unit; During the pumping unit load simulation, the three-phase power from the grid is rectified into a DC voltage by the No. 1 diode rectifier bridge, and then supplied to the No. 1 inverter. The No. 1 inverter then generates a three-phase variable frequency voltage to supply the No. 1 three-phase AC asynchronous motor. When simulating the pumping unit, the three-phase power supply of the grid is rectified into DC voltage by the No. 2 diode rectifier bridge, and then supplied to the No. 2 inverter. The No. 2 inverter generates a three-phase variable frequency voltage to supply the No. 2 three-phase AC asynchronous motor.

8. The test method of the pumping unit redundant energy recycling simulation test platform according to claim 7 is characterized in that: In S1, the oil well is measured using a power quality analyzer to obtain data on pump depth, stroke, stroke frequency, dynamic liquid level, liquid volume, oil volume, power consumption, and power consumption; In S2, the working parameters of the working and redundant energy states during the operation of the pumping unit are working time, feedback time, stroke frequency, working power, and redundant energy power; The test finally obtained the hourly power consumption without the pumping unit redundant energy recovery and utilization device, the hourly power consumption with the pumping unit redundant energy recovery and utilization device, and the power saving rate.

9. The test method of the redundant energy recycling simulation test platform for pumping units according to claim 8 is characterized in that: The redundant energy recovery device of the pumping unit is installed at the oil well site, and the oil well pumping unit is measured using a power quality analyzer. The measured data is compared with the simulation data to verify the accuracy of the simulation test.

10. The test method of a pumping unit redundant energy recycling simulation test platform according to claim 8, characterized in that: Use the power quality analyzer to measure the oil well of the oil beam machine or the belt conveyor oil well.

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