CN218974537U - Test power supply device for submersible permanent magnet synchronous motor - Google Patents
Test power supply device for submersible permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN218974537U CN218974537U CN202223149749.1U CN202223149749U CN218974537U CN 218974537 U CN218974537 U CN 218974537U CN 202223149749 U CN202223149749 U CN 202223149749U CN 218974537 U CN218974537 U CN 218974537U
- Authority
- CN
- China
- Prior art keywords
- circuit
- frequency converter
- output
- power supply
- converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
The utility model discloses a submersible permanent magnet synchronous motor test power supply device which comprises a wire inlet cabinet circuit, a transformer circuit, a voltage regulator circuit, a frequency converter circuit and a wiring cabinet, wherein the frequency converter circuit comprises a frequency converter input power supply control circuit, a first frequency converter, a second frequency converter, a third frequency converter and a frequency converter output power supply control circuit, the output end of the wire inlet cabinet circuit is respectively connected with the transformer circuit and the voltage regulator circuit, the transformer circuit is respectively connected to the second frequency converter and the third frequency converter through the frequency converter input power supply control circuit, the voltage regulator circuit is respectively connected to the first frequency converter, the second frequency converter and the third frequency converter through the frequency converter input power supply control circuit, and the output ends of the first frequency converter, the second frequency converter and the third frequency converter are all connected to the wiring cabinet through the frequency converter output power supply control circuit. The test power supply device can flexibly adjust the power supply circuit and the voltage level according to test requirements, and meets the test requirements of different types of motors.
Description
Technical Field
The utility model relates to the technical field of motor testing, in particular to a submersible permanent magnet synchronous motor testing power supply device.
Background
The screw pump rodless oil extraction technology driven by the submersible motor has the advantages of less material consumption, energy conservation, adaptation to complex well conditions, high lift and large discharge capacity, so that the oil extraction mode driven by the submersible motor is more and more paid attention. The submersible permanent magnet synchronous motor is an important component of a submersible screw pump oil extraction system, and the quality of the submersible permanent magnet synchronous motor is an important factor affecting popularization and use of the electric submersible pump. Along with the development of the submersible permanent magnet synchronous motor, the requirements on the submersible motor test bed are continuously improved, one submersible motor test bed is required to be capable of conducting submersible motor tests of various types and specifications, different power supply modes, voltage grades, current grades and the like are required for submersible motors of different types and specifications, and the conventional motor test bed power supply device is difficult to meet the requirements.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, and provides a testing power supply device for a submersible permanent magnet synchronous motor, which can flexibly adjust a power supply circuit and a voltage level according to test requirements and meet the test requirements of motors of different types.
The technical aim of the utility model is realized by the following technical scheme: the utility model provides a submersible permanent magnet synchronous motor test power supply unit, includes income line cabinet circuit, transformer circuit, voltage regulator circuit, converter circuit and wiring cabinet, the converter circuit includes converter input power supply control circuit, first converter, second converter, third converter and converter output power supply control circuit, the input of income line cabinet circuit is connected to three-phase alternating current power supply, the output of income line cabinet circuit respectively with transformer circuit with voltage regulator circuit's input is connected, the output of income line cabinet circuit loops through knife switch three, fuse three and converter input power supply control circuit with first converter's input is connected, the output of transformer circuit passes through converter input power supply control circuit is connected to respectively the second converter with third converter, the output of transformer circuit passes through converter input power supply control circuit is connected to respectively to first converter, second converter and third converter, first converter and third converter respectively with transformer circuit's input power supply control circuit with voltage regulator is connected to, first converter, second converter and third converter in proper order through the output of transformer input power supply control circuit all pass through the wiring cabinet is connected to the output of first converter.
The utility model is further provided with: the line cabinet circuit includes surge protector, knife switch I, fuse, circuit breaker I, smart electric meter I and current transformer I, surge protector sets up knife switch I's input and is connected with three-phase alternating current power supply, knife switch I's output pass through fuse I with circuit breaker I is connected, current transformer I sets up circuit breaker I's output, smart electric meter I with current transformer I is connected.
The utility model is further provided with: the first frequency converter is 330V frequency converter, the second frequency converter is 660V frequency converter, the third frequency converter is 1100V frequency converter, the wiring closet with the second frequency converter all is equipped with a plurality of, the second frequency converter with the wiring closet one-to-one is connected, the first frequency converter with the third frequency converter all is equipped with one, the first frequency converter with the output of third frequency converter all passes through converter output power control circuit is connected to each respectively the wiring closet.
The utility model is further provided with: the transformer circuit comprises a knife switch II, a fuse II, a contactor I and a transformer, wherein the input end of the transformer is connected to the output end of the wire inlet cabinet circuit sequentially through the knife switch II, the fuse II and the contactor I, the transformer is provided with two output ends, the first output end of the transformer is connected to the second frequency converter through the frequency converter input power supply control circuit, and the second output end of the transformer is connected to the third frequency converter through the frequency converter input power supply control circuit.
The utility model is further provided with: the voltage regulator circuit comprises a knife switch IV, a fuse IV, a contactor II, a voltage regulator and an intelligent voltmeter, wherein the input end of the voltage regulator is connected to the output end of the wire inlet cabinet circuit sequentially through the knife switch IV, the fuse IV and the contactor II, and the intelligent voltmeter is connected with the output end of the voltage regulator through a voltage transformer.
The utility model is further provided with: the frequency converter input power supply control circuit comprises a plurality of frequency converter input circuits, the input ends of a first frequency converter, a second frequency converter and a third frequency converter are respectively provided with the frequency converter input circuits, each frequency converter input circuit comprises a third contactor, a fourth contactor, a second current transformer, a second intelligent ammeter and a sixth circuit breaker, one end of the third contactor, which is close to the first frequency converter, is connected with the output end of the third fuse, one end of the third contactor, which is close to the second frequency converter, is connected with the first output end of the transformer, one end of the third contactor, which is close to the third frequency converter, is connected with the second output end of the transformer, one end of each fourth contactor voltage regulator is connected with the output end of the fourth contactor, the other end of the fourth contactor is connected with the input end of the second current transformer, the output end of the second current transformer is connected to the sixth circuit breaker, and the second intelligent ammeter is connected with the second current transformer.
The utility model is further provided with: the frequency converter output power supply control circuit comprises a first frequency converter output circuit, a second frequency converter output circuit and a third frequency converter output circuit;
the output circuit of the first frequency converter comprises a first reactor and a plurality of first output branches, wherein the input end of the first reactor is connected with the output end of the first frequency converter, the output end of the first reactor is connected to a wiring cabinet through one first output branch, and each first output branch comprises a contactor five and a knife switch five;
the second frequency converter output circuit comprises a second reactor and a sixth contactor, and the output end of each second frequency converter is connected to the wiring cabinet through the second reactor and the sixth contactor;
the output circuit of the third frequency converter comprises a third reactor and a plurality of second output branches, the input end of the third reactor is connected with the output end of the third frequency converter, the output end of the third reactor is connected to one wiring cabinet through one second output branch, and each second output branch comprises a seventh contactor and a sixth knife switch.
The utility model is further provided with: the power distribution circuit comprises a control system power supply circuit, a heating circuit and two standby circuits, wherein the control system power supply circuit is connected with the output end of the wire inlet cabinet circuit through a circuit breaker II and used for supplying power to the control circuit of the electrical control system, the heating circuit is connected with the output end of the wire inlet cabinet circuit through a circuit breaker III and used for heating control of the wire inlet cabinet, and the two standby circuits are connected with the output end of the wire inlet cabinet circuit through a circuit breaker IV and a circuit breaker V respectively.
The utility model is further provided with: the input end of each wiring cabinet is connected with a power analyzer, each wiring cabinet is internally provided with a power sensor, and the power sensor is connected with the power analyzer through an optical fiber.
The utility model is further provided with: the input of wiring cabinet still is provided with motor resistance measurement circuit and motor coast time measurement circuit, motor resistance measurement circuit includes the microohm meter, motor coast time measurement circuit includes the coast time measuring apparatu, the microohm meter with the coast time measuring apparatu all through contactor circuit with the wiring cabinet is connected.
The beneficial effects of the utility model are as follows: the testing power supply device of the submersible permanent magnet synchronous motor has the main functions of providing a proper power supply for a submersible motor testing system, and flexibly adjusting a power supply circuit and a voltage level according to test requirements by arranging a transformer circuit, a voltage regulator circuit and a frequency converter circuit so as to meet the power supply requirements on a test motor, a test system control circuit and other tests; through setting up 380V converter, 660V converter and 1100V converter, can provide the voltage of three kinds of different grades, through converter input power control circuit and converter output power control circuit, can select the power supply line in a flexible way according to the test needs, realize that test voltage is adjustable, satisfy the test demand of different grade type motors, circuit structure is simple, convenient operation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of module connection of a submersible permanent magnet synchronous motor test power supply device of the utility model;
FIG. 2 is a schematic circuit diagram of a test power supply device of a submersible permanent magnet synchronous motor;
FIG. 3 is a schematic diagram of the circuit structure of the wire inlet cabinet of the submersible permanent magnet synchronous motor test power supply device;
FIG. 4 is a schematic diagram of a transformer circuit structure of a submersible permanent magnet synchronous motor test power supply device of the utility model;
fig. 5 is a schematic diagram of a voltage regulator circuit structure of a submersible permanent magnet synchronous motor test power supply device according to the utility model;
FIG. 6 is a schematic diagram of a frequency converter input power control circuit of a submersible permanent magnet synchronous motor test power supply device according to the utility model;
FIG. 7 is a schematic diagram of a control circuit of the output power supply of the frequency converter of the submersible permanent magnet synchronous motor test power supply device;
FIG. 8 is a schematic diagram of the distribution circuit structure of a submersible permanent magnet synchronous motor test power supply device according to the utility model;
fig. 9 is a schematic diagram of a motor resistance measuring circuit and a motor sliding time measuring circuit of a submersible permanent magnet synchronous motor test power supply device.
In the figure, 1, a wire cabinet circuit; 2. a transformer circuit; 3. a voltage regulator circuit; 4. the frequency converter is input into a power supply control circuit; 5. a first frequency converter; 6. a second frequency converter; 7. a third frequency converter; 8. the frequency converter outputs a power supply control circuit; 9. a wiring cabinet; 10. a distribution line; 11. a motor resistance measuring circuit; 12. and a motor sliding time measuring circuit.
Detailed Description
The technical scheme of the present utility model will be clearly and completely described in connection with specific embodiments. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.
Referring to fig. 1, a submersible permanent magnet synchronous motor test power supply device comprises a wire cabinet circuit 1, a transformer circuit 2, a voltage regulator circuit 3, a frequency converter circuit and a wiring cabinet 9, wherein the frequency converter circuit comprises a frequency converter input power supply control circuit 4, a first frequency converter 5, a second frequency converter 6, a third frequency converter 7 and a frequency converter output power supply control circuit 8, the input end of the wire cabinet circuit 1 is connected to a three-phase alternating current power supply, the output end of the wire cabinet circuit 1 is respectively connected with the input ends of the transformer circuit 2 and the voltage regulator circuit 3, the output end of the wire cabinet circuit 1 is sequentially connected with the input ends of the first frequency converter 5 through a knife switch three QS0003, a fuse three FU3 and the frequency converter input power supply control circuit 4, the output end of the transformer circuit 2 is respectively connected to the second frequency converter 6 and the third frequency converter 7 through the frequency converter input power supply control circuit 4, the output end of the circuit 3 is respectively connected to the first frequency converter 5, the second frequency converter 6 and the third frequency converter 7 through the frequency converter input power supply control circuit 4, and the output ends of the first frequency converter 6 and the third frequency converter 7 are respectively connected to the first frequency converter 7 and the third frequency converter 7 through the frequency converter output ends of the third frequency converter 7 and the power supply control circuit 9. The testing power supply device of the submersible permanent magnet synchronous motor has the main functions of providing a proper power supply for a submersible motor testing system, and flexibly adjusting a power supply circuit and a voltage level according to test requirements by arranging the transformer circuit 2, the voltage regulator circuit 3 and the frequency converter circuit so as to meet the power supply requirements of a test motor, a test system control circuit and other tests; through setting up first converter 5, second converter 6 and third converter 7, can provide the voltage of three kinds of different grades, through converter input power control circuit 4 and converter output power control circuit 8, can select the power supply line in a flexible way according to the test needs, realize that test voltage is adjustable, satisfy the test demand of different grade type motors, circuit structure is simple, convenient operation.
Referring to fig. 2, the first frequency converter 5 is a 330V frequency converter, the second frequency converter 6 is a 660V frequency converter, the third frequency converter 7 is a 1100V frequency converter, the wiring closet 9 and the second frequency converter 6 are all provided with a plurality of, the second frequency converter 6 and the wiring closet 9 are connected in one-to-one correspondence, the first frequency converter 5 and the third frequency converter 7 are all provided with one, and the output ends of the first frequency converter 5 and the third frequency converter 7 are respectively connected to each wiring closet 9 through a frequency converter output power supply control circuit 8. The test motor has three different rated power supply voltages, namely 380V, 660V and 1100V, so that the power supply device needs to provide three-phase power supplies with the three voltages, the power supply can be directly powered by a three-phase alternating current power supply for 380V power supply requirements, and the power supply is realized through a transformer for 660V and 1100V power supply requirements, and the transformer adopts a double-output transformer for simultaneously outputting the two voltages of 660V and 1100V. In addition, the voltage regulator with the output voltage of 0-1500V is used for outputting any adjustable voltage, so that the power supply voltage can be accurately regulated, the power supply of various frequency converters can be realized, the performance of the frequency converter in the case of abnormal power supply voltage can be tested, and other test projects related to the power supply voltage can be completed.
It should be noted that, because the motors with 660V voltages are mostly used in the tested motors, a plurality of 660V frequency converters are provided, and each wiring cabinet is provided with a 660V frequency converter, and the special purpose of the special well is provided with 3 wiring cabinets, namely, a 1-well wiring cabinet, a 2-well wiring cabinet and a 3-well wiring cabinet, and three 660V frequency converters are correspondingly provided, namely, a 1-frequency converter, a 2-frequency converter and a 3-frequency converter. Since the 380V motor is relatively few, only one 380V inverter (No. 5 inverter shown in fig. 2) is provided, and the power supply control circuit 8 is switched to the required wiring closet 9 through the inverter output. The number of 1100V motors is relatively small, so that only one 1100V frequency converter (No. 4 frequency converter shown in fig. 2) is provided, and the frequency converter output power supply control circuit 8 can be used for switching to a required wiring cabinet 9 according to the requirement. All the power supplies of the frequency converters can be switched to the voltage regulator for power supply through the input power supply control circuit 4 of the frequency converters, so that each wiring cabinet 9 can be tested with an adjustable power supply for special requirements, and only one frequency converter can be powered by the voltage regulator at the same time in order to save capacity.
Referring to fig. 3, the line cabinet circuit 1 includes a surge protector, a knife switch one QS0001, a fuse one FU1, a breaker one QF1, a smart meter one FV001 and a current transformer one TVA001, the surge protector is disposed at an input end of the knife switch one QS0001 and is connected with a three-phase ac power supply, an output end of the knife switch one QS0001 is connected with the breaker one QF1 through the fuse one FU1, the current transformer one TVA001 is disposed at an output end of the breaker one QF1, and the smart meter one FV001 is connected with the current transformer one TVA 001. The three-phase alternating current power supply from the power transformer firstly enters a line-in cabinet, and in the line-in cabinet, a group of surge protectors are firstly arranged, so that external surge invasion such as lightning stroke is prevented, and electric appliances are prevented from being damaged. Next, a knife switch-QS 0001 is set as a manual master switch of the whole circuit, and a fuse-FU 1 is used for short-circuit protection of the whole circuit. The first QF1 of the breaker is an intelligent master switch of the whole circuit, and the intelligent master switch realizes the closing and opening operation by utilizing a control button, has overcurrent protection and short-circuit protection functions, and forms double insurance with the first FU1 of the fuse so as to protect the circuit to the maximum extent. The main power supply is used for supplying power to a control system, a transformer, a voltage regulator, a frequency converter and the like. An intelligent ammeter FV001 is arranged in the line-in cabinet and is used for measuring and displaying the current parameters of the total circuit and uploading the parameters to an industrial personal computer, such as voltage, current, power and the like. The intelligent ammeter is matched with the intelligent ammeter FV001 through the current transformer TVA001, and the input current waveform of the frequency converter is not sine wave, so that the current cannot be accurately measured by a common ammeter, and the intelligent ammeter selected by the design can be matched with the frequency converter for use.
Referring to fig. 2 and 4, the transformer circuit 2 includes a knife switch two QS0002, a fuse two FU2, a contactor one KM0001 and a transformer B1, an input end of the transformer B1 is connected to an output end of the line cabinet circuit 1 through the knife switch two QS0002, the fuse two FU2 and the contactor one KM0001 in sequence, the transformer B1 is provided with two output ends, a first output end of the transformer B1 is connected to the second frequency converter 6 through the frequency converter input power control circuit 4, and a second output end of the transformer B1 is connected to the third frequency converter 7 through the frequency converter input power control circuit 4. The input end of the transformer B1 is provided with a knife switch II QS0002 with rated current of 600A as a manual total switch of the line, and the circuit which is being supplied with power is normally not directly disconnected by the switch, but is disconnected under the condition that a contactor KM0001 is disconnected, so that the safety is ensured. The fuse with rated current of 600A protects the circuit, and the input and output are provided with contactors for remotely controlling the on-off of the circuit.
It should be noted that, as there are three kinds of frequency converters of 380V, 660V and 1100V, the 380V frequency converter only needs to directly use the power grid voltage, and the dual-output transformer is used to change the power grid voltage of 380V into 660V and 1100V to supply power to the 660V frequency converter and the 1100V frequency converter. Since the rated current of the 660V frequency converter is 65A, the three frequency converters can work simultaneously, the total current is 195A, and the 660V output current of the transformer is designed according to 200A. The rated current of the 1100V frequency converter is 35A, and the 1100V output current of the transformer is designed according to 45A. Therefore, a transformer with the model number SGB-350kVA is selected, the capacity of the transformer is 350kVA, and the transformer meets the circuit requirement.
Referring to fig. 2 and 5, the voltage regulator circuit 3 includes a knife switch four QS0004, a fuse four FU4, a contactor two KM0002, a voltage regulator B2, and an intelligent voltmeter FV002, wherein an input end of the voltage regulator B2 is connected to an output end of the line cabinet circuit 1 through the knife switch four QS0004, the fuse four FU4, and the contactor two KM0002 in sequence, and the intelligent voltmeter FV002 is connected to an output end of the voltage regulator B2 through a voltage transformer TVA 002. The voltage regulator B2 has a voltage regulating range of 0-1500V, can independently supply power to each frequency converter, and is provided with a 200A knife switch four QS0004 as a line master switch at the input end, so that the power supply circuit can not be directly disconnected by the switch. The fuse of 200A is provided to protect the circuit. The input end of the voltage regulator B2 is connected with a contactor two KM0002 for remotely controlling the on-off of a circuit, an intelligent voltmeter FV002 with 485 communication is arranged and is provided with a voltage transformer TVA002 for displaying the output voltage of the voltage regulator B2, and the current output voltage information of the voltage regulator B2 is transmitted to a corresponding industrial personal computer so as to automatically regulate the output of the voltage regulator B2. The voltage regulator B2 is arranged to supply power to any frequency converter, and because the frequency converter has 660V, 1100V and 380V three voltage inputs, only one frequency converter can select the voltage regulator to supply power, so the supply current is 65A at the maximum, the highest voltage is designed to be 1500V in consideration of the special requirement of the voltage regulation experiment, the three-phase autotransformer with the model of TSJA-250kVA is selected, the voltage regulator can output 0-1500V adjustable voltage, the capacity is 250kVA, and the test requirement of any motor can be met.
It should be understood that the voltage regulator can also be used as a backup transformer, and when the transformer or the transformer line fails, it can be understood that the switching to the voltage regulator power supply mode is performed, and all switching processes are completed in the control room, so that the delay of production due to the transformer failure is avoided. In the design, on the premise of ensuring safety, the automatic control is realized as much as possible, the operation before the workers arrive at the electric cabinet is basically not needed, and the switching control of the frequency converter can be operated on the control cabinet or completed by a computer.
Referring to fig. 2 and 6, the inverter input power control circuit 4 includes a plurality of inverter input circuits, and an input end of each inverter is provided with an inverter input circuit. The frequency converter input circuit of the No. 1 frequency converter comprises a contactor three KM1011, a contactor four KM1041, a current transformer two TVA101, a smart meter two FVA101 and a breaker six QF101; the frequency converter input circuit of the No. 2 frequency converter comprises a contactor three KM1012, a contactor four KM1042, a current transformer two TVA102, a smart meter two FVA102 and a breaker six QF102; the frequency converter input circuit of the No. 3 frequency converter comprises a contactor three KM1013, a contactor four KM1043, a current transformer two TVA103, a smart meter two FVA103 and a breaker six QF103; the frequency converter input circuit of the No. 4 frequency converter comprises a contactor three KM1024, a contactor four KM1044, a current transformer two TVA104, a smart meter two FVA104 and a breaker six QF104; the frequency converter input circuit of the No. 5 frequency converter comprises a contactor three KM1035, a contactor four KM1045, a current transformer two TVA105, a smart meter two FVA105 and a breaker six QF105. The input ends of the three contactors KM1011, KM1012 and KM1013 are connected with the 660V voltage output end of the transformer. The input end of the contactor three KM1024 is connected with the 1100V voltage output end of the transformer. The input end of the contactor three KM1035 is connected with the output end of the fuse three FU 3. The input ends of the contactors four KM1041, KM1042, KM1043, KM1044 and KM1045 are connected with the output end of the voltage regulator B2.
It should be noted that, the input power source of each frequency converter may be from a transformer (including 660V, 1100V, and 380V of the grid voltage) or a voltage regulator, so that each frequency converter has two power sources that can be selected. However, only one power supply can supply power to the frequency converters at the same time, so that a contactor is respectively arranged at two input ends of each frequency converter for remotely controlling the input of voltage, and each frequency converter input end is connected with an intelligent ammeter for displaying the currently input electric quantity information such as voltage, current, power and the like and uploading the information to a computer. Because the current at the input end of the frequency converter is not a regular sine wave, and a common ammeter cannot accurately measure the current, a schrader PM5350P power parameter measuring instrument (namely a smart ammeter in fig. 6) is selected and provided with a current transformer, so that the measuring requirement is met. A breaker is connected in front of the frequency converter, which is not only a power switch of the frequency converter, but also used for short-circuit protection of the frequency converter.
Referring to fig. 2 and 7, the inverter output power source control circuit 8 includes a first inverter output circuit, a second inverter output circuit, and a third inverter output circuit. The output ends of the No. 1 frequency converter are sequentially connected to a No. 1 well wiring cabinet through a second reactor LD1 and a sixth contactor KM 2011; the output end of the No. 2 frequency converter is connected to a No. 2 well wiring cabinet through a reactor II LD2 and a contactor six KM2022 in sequence; the output end of the No. 3 frequency converter is connected to a No. 3 well wiring cabinet through a reactor II LD3 and a contactor six KM2033 in sequence. The third frequency converter output circuit comprises a reactor three LD4 and three output branches II, each output branch II corresponds to a wiring cabinet, the input end of the reactor three LD4 is connected with the output end of the No. 4 frequency converter, and the output end of the reactor three LD4 is connected to the No. 1 well wiring cabinet, the No. 2 well wiring cabinet and the No. 3 well wiring cabinet through a first output branch II (comprising a contactor seven KM2041 and a knife switch six QS 2041), a second output branch II (comprising a contactor seven KM2042 and a knife switch six QS 2042) and a third output branch II (comprising a contactor seven KM2043 and a knife switch six QS 2043) respectively. The first frequency converter output circuit comprises a first reactor LD5 and a first three output branches, each output branch corresponds to a wiring cabinet, the input end of the first reactor LD5 is connected with the output end of the No. 5 frequency converter, and the output end of the first reactor LD5 is connected to the No. 1 well wiring cabinet, the No. 2 well wiring cabinet and the No. 3 well wiring cabinet through the first output branch (comprising a contactor seven KM2051 and a knife switch six QS 2051), the second output branch (comprising a contactor seven KM2052 and a knife switch six QS 2052) and the third output branch (comprising a contactor seven KM2053 and a knife switch six QS 2053) respectively.
The output of each frequency converter is firstly connected with a reactor for filtering, so that the quality of the output power supply of the frequency converter is improved. No. 1 well wiring cabinet can select No. 1 converter (660V), no. 4 converter (1100V) or No. 5 converter (380V) power supply, and No. 2 well wiring cabinet can select No. 2 converter (660V), no. 4 converter (1100V) or No. 5 converter (380V) power supply, and No. 3 well wiring cabinet can select No. 3 converter (660V), no. 4 converter (1100V) or No. 5 converter (380V) power supply. I.e. No. 4 frequency converter and No. 5 frequency converter can provide power for each wiring closet as required. One frequency converter cannot supply power to a plurality of wiring cabinets at the same time, and the same wiring cabinet cannot be supplied with power by a plurality of frequency converters at the same time. A contactor and a knife switch are therefore provided at each input of each junction box for controlling the input voltage to the junction box.
Referring to fig. 8, the electric power distribution device further comprises a power distribution circuit 10, wherein the power distribution circuit 10 comprises a control system power supply circuit, a heating circuit and two standby circuits, the control system power supply circuit is connected with the output end of the wire inlet cabinet circuit 1 through a circuit breaker II QF2 and is used for supplying power to the control circuit of the electric control system, the heating circuit is connected with the output end of the wire inlet cabinet circuit 1 through a circuit breaker III QF3 and is used for heating control of a No. 3 well wiring cabinet, and the two standby circuits are connected with the output end of the wire inlet cabinet circuit 1 through a circuit breaker IV QF4 and a circuit breaker V QF5 respectively. 4 current breakers are arranged in the wire inlet cabinet to perform leakage protection on four distribution lines.
Referring to fig. 2, the input end of each wiring closet 9 is connected with a power analyzer, and each wiring closet 9 is internally provided with a power sensor, and the power sensor is connected with the power analyzer through an optical fiber. Because the frequency converter outputs irregular waveforms, the general ammeter cannot accurately measure the output voltage and current of the frequency converter. The same wiring closet may test motors of different voltages, which requires switching the power supply of the frequency converters of different voltages. Because the measuring instrument is high in price, in order to reduce the cost, the output power of the measuring instrument is not measured at the output end of each frequency converter, but is measured in front of the No. 1, no. 2 and No. 3 well wiring cabinets, and the power sensor is arranged in the No. 1, no. 2 and No. 3 wiring cabinets. The selected power analyzer has the characteristics of high bandwidth and high precision, and the power analyzer is free from multi-sensor gear shifting to realize wide-range high-precision test, and the power sensor is connected with the power analyzer through an optical fiber to prevent the interference of a frequency converter.
Referring to fig. 2 and 9, the input end of the wiring cabinet 9 is further provided with a motor resistance measurement circuit 11 and a motor sliding time measurement circuit 12, the motor resistance measurement circuit 11 comprises a microohm meter, the motor sliding time measurement circuit 12 comprises a sliding time measuring instrument, and the microohm meter and the sliding time measuring instrument are connected with the wiring cabinet 9 through contactor circuits. A motor resistance measuring circuit 11 is arranged in front of each wiring cabinet 9, a motor sliding time measuring circuit 12 is arranged in front of the No. 1 and No. 3 well wiring cabinets 9, a microohm meter is used for measuring motor resistance, a sliding time measuring instrument is used for measuring sliding time, and the sliding time is measured by measuring the magnitude of induced electromotive force generated by cutting a stator permanent magnet by a rotor when the motor slides. The motor resistance and the coasting time cannot be measured simultaneously, so that the contactor is used for controlling the operation of the two measuring circuits. The motor power is ensured to be disconnected when the two parts work.
Claims (10)
1. The utility model provides a submersible permanent magnet synchronous motor test power supply unit which characterized in that: including income line cabinet circuit (1), transformer circuit (2), voltage regulator circuit (3), converter circuit and wiring cabinet (9), the converter circuit includes converter input power control circuit (4), first converter (5), second converter (6), third converter (7) and converter output power control circuit (8), the input of income line cabinet circuit (1) is connected to three-phase alternating current power supply, the output of income line cabinet circuit (1) respectively with transformer circuit (2) with the input of voltage regulator circuit (3) is connected, the output of income line cabinet circuit (1) loops through knife switch three, fuse three and converter input power control circuit (4) with the input of first converter (5) is connected, the output of transformer circuit (2) is passed through converter input power control circuit (4) is connected to respectively second converter (6) with third converter (7), the output of income line cabinet circuit (1) respectively with the input of voltage regulator circuit (4) is connected to first converter (5) through voltage regulator circuit (4), the output of frequency converter (3) is connected to the input of third converter (5) through voltage regulator circuit (4) respectively The output ends of the second frequency converter (6) and the third frequency converter (7) are connected to the wiring cabinet (9) through the frequency converter output power supply control circuit (8).
2. The submersible permanent magnet synchronous motor test power supply device according to claim 1, wherein: the wire inlet cabinet circuit (1) comprises a surge protector, a first knife switch, a first fuse, a first breaker, a first intelligent ammeter and a first current transformer, wherein the surge protector is arranged at the input end of the first knife switch and is connected with a three-phase alternating current power supply, the output end of the first knife switch is connected with the first breaker through the first fuse, the first current transformer is arranged at the output end of the first breaker, and the first intelligent ammeter is connected with the first current transformer.
3. The submersible permanent magnet synchronous motor test power supply device according to claim 1, wherein: the first frequency converter (5) is 330V frequency converter, second frequency converter (6) is 660V frequency converter, third frequency converter (7) is 1100V frequency converter, wiring cabinet (9) with second frequency converter (6) all are equipped with a plurality of, second frequency converter (6) with wiring cabinet (9) one-to-one connection, first frequency converter (5) with third frequency converter (7) all are equipped with one, first frequency converter (5) with the output of third frequency converter (7) all is passed through converter output power control circuit (8) are connected to each respectively wiring cabinet (9).
4. The submersible permanent magnet synchronous motor test power supply device according to claim 3, wherein: the transformer circuit (2) comprises a knife switch II, a fuse II, a contactor I and a transformer, wherein the input end of the transformer is connected to the output end of the line-in cabinet circuit (1) sequentially through the knife switch II, the fuse II and the contactor I, the transformer is provided with two output ends, the first output end of the transformer is connected to the second frequency converter (6) through the frequency converter input power supply control circuit (4), and the second output end of the transformer is connected to the third frequency converter (7) through the frequency converter input power supply control circuit (4).
5. The submersible permanent magnet synchronous motor test power supply device according to claim 4, wherein: the voltage regulator circuit (3) comprises a knife switch IV, a fuse IV, a contactor II, a voltage regulator and an intelligent voltmeter, wherein the input end of the voltage regulator is connected to the output end of the wire inlet cabinet circuit (1) through the knife switch IV, the fuse IV and the contactor II in sequence, and the intelligent voltmeter is connected with the output end of the voltage regulator through a voltage transformer.
6. The submersible permanent magnet synchronous motor test power supply device according to claim 5, wherein: the frequency converter input power supply control circuit (4) comprises a plurality of frequency converter input circuits, the input ends of a first frequency converter (5), a second frequency converter (6) and a third frequency converter (7) are respectively provided with the frequency converter input circuits, each frequency converter input circuit comprises a third contactor, a fourth contactor, a second current transformer, a second intelligent ammeter and a sixth circuit breaker, one end of the third contactor, which is close to the first frequency converter (5), is connected with the output end of the third fuse, one end of the third contactor, which is close to the second frequency converter (6), is connected with the first output end of the transformer, one end of the third contactor, which is close to the third frequency converter (7), is connected with the second output end of the transformer, one end of the fourth contactor is connected with the output end of the voltage regulator, the other ends of the third contactor and the fourth contactor are respectively connected with the input end of the second current transformer, the second output end of the fourth contactor is connected with the second current transformer, and the second intelligent ammeter is connected with the second current transformer.
7. The submersible permanent magnet synchronous motor test power supply device according to any one of claims 3 to 6, wherein: the frequency converter output power supply control circuit (8) comprises a first frequency converter output circuit, a second frequency converter output circuit and a third frequency converter output circuit;
the first frequency converter output circuit comprises a first reactor and a plurality of first output branches, wherein the input end of the first reactor is connected with the output end of the first frequency converter (5), the output end of the first reactor is connected to a wiring cabinet (9) through one first output branch, and each first output branch comprises a contactor five and a knife switch five;
the second frequency converter output circuit comprises a second reactor and a sixth contactor, and the output end of each second frequency converter (6) is connected to the wiring cabinet (9) through the second reactor and the sixth contactor;
the output circuit of the third frequency converter comprises a third reactor and a plurality of second output branches, the input end of the third reactor is connected with the output end of the third frequency converter (7), the output end of the third reactor is connected to one wiring cabinet (9) through one second output branch, and each second output branch comprises a contactor seven and a knife switch six.
8. The submersible permanent magnet synchronous motor test power supply device according to claim 1, wherein: still include distribution lines (10), distribution lines (10) include control system power supply circuit, heating circuit and two standby circuit, control system power supply circuit pass through circuit breaker two with the output of income line cabinet circuit (1) is connected for the control circuit power supply to electric control system, heating circuit pass through circuit breaker three with the output of income line cabinet circuit (1) is connected for the heating control of terminal box (9), two standby circuit pass through circuit breaker four and circuit breaker five respectively with the output of income line cabinet circuit (1) is connected.
9. The submersible permanent magnet synchronous motor test power supply device according to claim 1, wherein: the input end of each wiring cabinet (9) is connected with a power analyzer, each wiring cabinet (9) is internally provided with a power sensor, and the power sensor is connected with the power analyzer through optical fibers.
10. The submersible permanent magnet synchronous motor test power supply device according to claim 1, wherein: the intelligent electric motor is characterized in that a motor resistance measuring circuit (11) and a motor sliding time measuring circuit (12) are further arranged at the input end of the wiring cabinet (9), the motor resistance measuring circuit (11) comprises a microohm meter, the motor sliding time measuring circuit (12) comprises a sliding time measuring instrument, and the microohm meter and the sliding time measuring instrument are connected with the wiring cabinet (9) through a contactor circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223149749.1U CN218974537U (en) | 2022-11-25 | 2022-11-25 | Test power supply device for submersible permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223149749.1U CN218974537U (en) | 2022-11-25 | 2022-11-25 | Test power supply device for submersible permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218974537U true CN218974537U (en) | 2023-05-05 |
Family
ID=86166989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223149749.1U Active CN218974537U (en) | 2022-11-25 | 2022-11-25 | Test power supply device for submersible permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218974537U (en) |
-
2022
- 2022-11-25 CN CN202223149749.1U patent/CN218974537U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101400009B1 (en) | Training apparatus for a smart grid education | |
| CN206850445U (en) | A kind of low-voltage platform area power quality harnessed synthetically power distribution equipment | |
| CN109884439B (en) | Black-start test system and method for power system | |
| CN202231434U (en) | Intelligent power saver | |
| CN203352191U (en) | Multi-adaptive photovoltaic inverter detection system | |
| CN103219766A (en) | Non floating charge lithium battery type DC (direct current) power system used for station | |
| CN111487466A (en) | Electrified detection device for direct current resistance of secondary circuit of current transformer | |
| CN203326621U (en) | Non floating charge lithium battery type DC (direct current) power system used for station | |
| CN203104085U (en) | High-voltage direct-current power supply system | |
| CN202159979U (en) | Intelligent reactive power adjustment and compensation device | |
| CN218974537U (en) | Test power supply device for submersible permanent magnet synchronous motor | |
| CN206422581U (en) | Battery multi-way intelligence charger | |
| CN106249082B (en) | Generating set control panel test device | |
| CN209979826U (en) | Testing device of distribution transformer | |
| CN202002980U (en) | Energy-saving capacitor test table arranged on three-phase electric motor | |
| CN213302497U (en) | Current transformer secondary side loop detection device and circuit | |
| CN203522011U (en) | Intelligent relay protection test power supply panel | |
| CN204789917U (en) | Photovoltaic controller detecting system | |
| CN204495952U (en) | A kind of low and medium voltage distribution network simulation system based on energy back | |
| CN106849105A (en) | Low-voltage distributing line intelligent regulating device | |
| CN202586344U (en) | Power-saving device having power-saving rate verification system | |
| CN202817886U (en) | Uninterruptible power source | |
| CN201359924Y (en) | Low-voltage intelligent capacitor | |
| CN202166723U (en) | Testing device for secondary current of main switch | |
| CN214280448U (en) | Intelligent low-voltage power distribution cabinet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |