CN204008751U - Frequency conversion experiment power supply system in wind-power electricity generation machine testing - Google Patents
Frequency conversion experiment power supply system in wind-power electricity generation machine testing Download PDFInfo
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- CN204008751U CN204008751U CN201420481389.1U CN201420481389U CN204008751U CN 204008751 U CN204008751 U CN 204008751U CN 201420481389 U CN201420481389 U CN 201420481389U CN 204008751 U CN204008751 U CN 204008751U
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Abstract
The utility model discloses the frequency conversion experiment power supply system in a kind of wind-power electricity generation machine testing.The utility model comprises the Input Control Element being connected with 10KV power supply, and Input Control Element is connected with rectification unit, DC bus, the first inversion unit, the first filter unit successively, output control unit, tested motor connect; The output terminal of tested motor connects torque rotary speed sensor, then drags and accompany examination motor; After accompanying the examination output terminal of motor and the input end of described output control unit to be connected, then be connected with the second filter unit, the second inversion unit, DC bus successively; Input Control Element, output control unit and the first inversion unit are connected with host computer with the second inversion unit; The input end of tested motor with accompany examination motor output terminal be connected with current-voltage sampling system respectively.The utlity model has energy feedback, remote network control, advanced inverter control and parameter accurately measures and the feature of data acquisition.
Description
Technical field
The utility model belongs to aerogenerator detection technique field, be specifically related to a kind of there is energy feedback, remote network control, advanced inverter control and parameter accurately measures and the wind-power electricity generation machine testing of data acquisition in frequency conversion experiment power supply system.
Background technology
Current, the semi-automatic character of the many genus of parameter of electric machine test macro in order to simplify control, all needs artificial wiring and artificial treatment data when conversion test event, and automaticity is not high, inefficiency.Moreover, because the existence of various human factors also makes, the dispersed accuracy large, test findings of test figure is low, poor repeatability.Development along with electronic technology and control technology, single-chip microcomputer testing scheme starts to apply comparative maturity, single-chip microcomputer test is generally core by single-chip microcomputer, and collecting test data, carry out calculation of parameter automatically automatically, adopt numeral to show, measuring accuracy is high, and saves time than traditional scheme, saves manpower, greatly improve test efficiency, reduce labor intensity.But this scheme still can not well thoroughly solve the human oriented design at the reading stationary problem in experimental data processing, process of the test, voltage waveform sine distortion rate and test interface.
At present, domestic testing apparatus and the system that has research institution to develop the multiple motor tests such as " Motor Production Test test macro ", " feedback loading Motor-Testing System ", " Intelligent motor test macro ".But mostly divide a test many, belong to semi-automatic character more.Technically except test figure intelligent processing method, automatically control and regulate, there is no new breakthrough.And in current application, the voltage of product frequency converter and frequency can not independent regulation, therefore the still requirement of Pass Test power supply completely of product frequency converter, part test also handy unit power supply completes.
Summary of the invention
The purpose of this utility model is the specific (special) requirements for the pilot system of serial variable-frequency motor, aerogenerator, provide a kind of there is energy feedback, remote network control, advanced inverter control and parameter accurately measures and the wind-power electricity generation machine testing of data acquisition in frequency conversion experiment power supply system.
The purpose of this utility model realizes by the following technical solutions: the frequency conversion experiment power supply system in this wind-power electricity generation machine testing, it comprises the Input Control Element being connected with 10KV power supply, the output terminal of Input Control Element is connected with rectification unit, DC bus, the first inversion unit, the first filter unit successively, and the output terminal of the first filter unit is connected with tested motor by output control unit; The output terminal of tested motor connects torque rotary speed sensor, then drags and accompany examination motor; After accompanying the examination output terminal of motor and the input end of described output control unit to be connected, then be connected with the second inversion unit with the second filter unit successively, the output terminal of the second inversion unit is connected on the DC bus of described rectification unit output terminal; Described Input Control Element, output control unit and the first inversion unit are connected with host computer with the second inversion unit; The input end of described tested motor with accompany examination motor output terminal be connected with current-voltage sampling system respectively.
Particularly, described Input Control Element comprises input switch cabinet, rectifier transformer and power factor compensator.
Particularly, described rectification unit comprises three-phase bridge rectification circuit, resistance R 1, resistance R 2 and capacitor C1, and described three-phase bridge rectification circuit one end resistance in series R1 is in parallel with resistance R 2 and capacitor C1 respectively again.
Particularly, described the first inversion unit and the second inversion unit include IGBT module, diode and inversion electric capacity.
Particularly, described the first filter unit and the second filter unit include filter transformer, cooling fan and filter capacitor.
Particularly, described output control unit comprises transformer isolation cabinet, output transformer, output switch cabinet and measurement wiring cabinet.
Frequency conversion test of the present utility model is by 10KV mains supply, 10KV voltage becomes step-down through Input Control Element, after step-down again through 12 pulse wave rectifiers, with become the alternating voltage that voltage magnitude and frequency all can regulate separately by inverter, finally by output control unit, boost as experiment power supply, be output as the required trial voltage grade of experiment electric motor.Through frequency conversion system of the present utility model, convert out (comprising Input Control Element, rectification unit, the first inversion unit, the first filter unit, output control unit) power supply of Pass Test requirement, give tested motor; The output of tested motor connects torque rotary speed sensor, then drags and accompany examination motor, and the electric energy of accompanying examination motor to send feeds back on DC bus through inverter, resupply tested motor, so circulation, recycling, has reduced the energy that system is drawn from electrical network.
Basic functional principle of the present utility model is: inlet wire 10KV AC rectification, be direct current, pass through again inversion unit, become sine wave, after filtering, transformer isolation produces pure sine wave (irregularity of wave form is less than 5%), and frequency range is 10～100Hz.Feedback unit is a Based Intelligent Control synchronous rectification, when accompanying examination motor to be operated in fourth quadrant (generating state), through DSP, adopting particular algorithm to control this unit is direct current AC rectification, feeds back to DC bus (because be direct current feedback, pollution-free to electrical network).During use, only need the asynchronous machine of two same model to dragging.
The utility model electronic internal-feedback frequency conversion power source that takes the lead at home having released, this power supply integrates tested motor sine-wave power and accompanies examination motor power, is the once innovation of motor test power supply; Innovation ground adopts digital frequency conversion power pack, makes to drag with frequency converter voltage and frequency independent adjustable, by variable-frequency power sources group, replaces " five units " to drag Control experiment power-supply system.The feature of the utility model power supply maximum is that the mode of electric power feedback is carried out in power supply inside, and feedback grid, does not adopt load consumption yet, therefore can be energy-conservation more than 70%.
Accompanying drawing explanation
Fig. 1 is the system principle structured flowchart of the utility model embodiment.
Fig. 2 is the circuit diagram of Input Control Element in Fig. 1.
Fig. 3 is the circuit diagram of rectification unit in Fig. 1.
Fig. 4 is the circuit diagram of the first inversion unit and the second inversion unit in Fig. 1.
Fig. 5 is the circuit diagram of the first filter unit and the second filter unit in Fig. 1.
Fig. 6 is the circuit diagram of output control unit in Fig. 1.
Fig. 7 is network control system theory diagram of the present utility model.
Fig. 8 is the control system hardware principle block diagram of inversion unit of the present utility model.
Fig. 9 is measurement of the present utility model and data acquisition theory diagram.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Referring to Fig. 1, the present embodiment comprises the Input Control Element being connected with 10KV power supply, the output terminal of Input Control Element is connected with rectification unit, DC bus 1, the first inversion unit, the first filter unit successively, and the output terminal of the first filter unit is connected with tested motor 2 by output control unit; The output terminal of tested motor 2 connects torque rotary speed sensor 3, then drags and accompany examination motor 4; After accompanying the examination output terminal of motor 4 and the input end of output control unit to be connected, then be connected with the second inversion unit with the second filter unit successively, the output terminal of the second inversion unit is connected on the DC bus 1 of rectification unit output terminal; Input Control Element, output control unit and the first inversion unit are connected with host computer 5 with the second inversion unit; The input end of tested motor 2 with accompany examination motor 4 output terminal be connected with current-voltage sampling system respectively.
Referring to Fig. 2, above-mentioned Input Control Element comprises input switch cabinet 6, rectifier transformer 8 and power factor compensator 7.Wherein, service entrance switch, inlet wire contactor and isolating switch all carry out reliably protecting to circuit, and itself also has perfect multi-stage protection power load or device.In addition, also configure the phase-shift reactor of a particular design, or adopted 12 arteries and veins rectification circuits and phase-shifting transformer can effectively eliminate the harmonic wave of electrical network.
Referring to Fig. 3; above-mentioned rectification unit comprises three-phase bridge rectification circuit, resistance R 1, resistance R 2 and capacitor C1; as seen from the figure, three-phase bridge rectification circuit one end resistance in series R1 is in parallel with resistance R 2 and capacitor C1 respectively again, resistance R 1 also with protection overtemperature switch in parallel.This main circuit will adopt three-phase bridge rectification circuit, and is furnished with capacitor, can improve input power factor; rectification module heat radiation adopts air blast cooling heat radiation; and be furnished with and report to the police and protection overtemperature switch, once rectification module is overheated, power supply can enter defence program immediately.
Referring to Fig. 4, above-mentioned the first inversion unit and the second inversion unit include IGBT module, diode and inversion electric capacity.The working method of inversion is that direct current is transformed into alternating current, and whole conversion process is controlled by microcontroller circuit.Inversion unit core component is IGBT module, and inversion electric capacity is selected self-cure type dry type film electric capacity.The all PCB circuit boards of inversion unit adopt curing of coatings treatment process, reach the object of moisture-proof anticorrosive erosion.Master control board control accuracy reaches Microsecond grade, and program circulating period should be less than 1 millisecond, interrupts protecting the response time should be less than 2 microseconds.More than inverter control chip processing speed on drive plate can reach 100M, meet drive plate and produce pulse width modulated wave accurately, guarantee that IGBT breaks down or can within very short time, module and driving circuit be protected during misoperation, prevented burning of IGBT.
Referring to Fig. 5, above-mentioned the first filter unit and the second filter unit include filter transformer, cooling fan.Filter transformer is dry-type transformer, and insulation rank is H level, and band intelligent temperature monitoring display and defencive function or touch-screen are unified to be shown, protection point can arrange arbitrarily.Filter transformer increases the protection net (or protection cabinet) with interlock in addition, ensures its safety, and filter capacitor is separately housed, and can guarantee to export desirable sine wave.
Referring to Fig. 6, above-mentioned output control unit comprises transformer isolation cabinet 9, output transformer 10, output switch cabinet 11 and measures wiring cabinet 12.Output unit is mainly output counter, output isolating switch is installed (under different capacity, variant, the variable-frequency power sources of relative low capacity, there is no ad hoc output counter), the voltage signal sampling summation current transformer sampling monitoring module that adopts closed loop to use is also installed simultaneously, to facilitate man-machine interface or host computer to monitor in real time and to show output information.
Frequency conversion experiment power supply of the present utility model adopts the frequency converter timing pilot system of advanced technology, have that power supply capacity is large, frequency power output scope is wide, start and stop are convenient, electrical network impacts the features such as little, energy-conservation, noise is little, can provide relevant test condition to type approval test for dispatching from the factory of aerogenerator.The motor test power supply providing can be according to testing requirements, export satisfactory voltage and current, to complete test, the voltage of variable-frequency power sources and frequency can be distinguished adjustable separately, can be in rated output voltage, frequency range frequency, the voltage of regulation output separately under a certain voltage or a certain frequency, can frequency stabilization pressure regulation, also can voltage stabilizing frequency modulation, voltage stabilization and frequency stabilization.
Referring to Fig. 7, the network control system theory diagram of frequency conversion experiment power supply as shown in Figure 2.Whole control system, comprise the subsystem that 2 covers are identical, by Long-distance Control 2 covers, meet respectively the frequency convertor system of testing wind-driven generator capacity, all-network adopts Profibus-DP agreement, form reliable network system, 2 host computers are as remote controllers, remote console (comprising host computer and operator's console) is located at pulpit, there are nearly control and control function far away, test is by on-the-spot local operation or pulpit operated from a distance, frequency converter exchanges output constant voltage is set, constant frequency is controlled function, voltage and frequency can regulate separately, rectifier is 2 cover system power supplies, two cover subsystems are shared.
Referring to Fig. 8, it is control core that this hardware platform be take DSP, FPGA and CPLD.Other chips are useful on the EPROM of the program of depositing and deposit the SRAM of ephemeral data; Be used for the EEPROM that preserves the NVRAM of Trouble Report, logout and deposit setting valve; For transmitting control signal and receiving the optical transceiver module of driving power feedback signal.Dsp chip can be realized various DSP algorithms fast, therefore control system completes frequency stabilization transformation in DSP program, stable voltage frequency conversion is controlled need to calculate 6 parameters such as switching frequency, minimum pulse width and Dead Time of sinusoidal modulation wave frequency, sinusoidal modulation wave initial phase, sinusoidal modulation wave which amplitude modulation ratio, PWM ripple, and by the communication mode of data bus, parameter is passed to FPGA.
FPGA adopts LatticeEC family chip, and it contains the necessary unit of FPGA, and its inside function can be carried out reprogramming by special placement-and-routing's instrument, to design required special IC.Because FPGA carries out parallel processing in the mode of pure hardware, do not take cpu resource, therefore can improve system performance.FPGA receives the control parameter that DSP transmits, and adopts nonsymmetrical rule sampling method to calculate SPWM trigger pip, by the special-purpose driving circuit of 2SD106AI, triggers IGBT.Because FPGA adopts hardware circuit, calculate, to time control accurately, thereby the trigger pip control accuracy of output is high.
CPLD chip has easy to use, and fast operation is suitable for the features such as combinational logic judgement, be therefore arranged in control system to judge the logical combination of each brachium pontis trigger pip, and when occurring when abnormal, the output of locking FPGA at once.
Referring to Fig. 8, experiment power supply and tested unit, TT&C system are integrated, be designed to a distributed network group control system.Operational management layer computing machine realized and being communicated by letter with administration and supervision authorities host computer by network, accepts administration order, transmits the operational factor of power-supply system.And write to each other by fieldbus and key-course slave computer, carry out monitor management, transfer control parameter etc.The multi-stage distributed network group control system forming thus, for the test of motor provides good experimental enviroment, has met test and has controlled requirement, has improved automaticity and the work efficiency of whole test macro.
Frequency conversion experiment power supply measuring system is comprised of voltage and current measurement cabinet, signal processing module, data acquisition hardware, software, industrial computer etc., and testing software, based on Windows 2000/XP operating system, adopts full Chinese interface, simple to operation.Test Data Collecting completes by testing table.The embedded IPC machine of testing table, measurement intelligent instrument, WT330 power meter and control electrical appliance.Experiment electric motor coherent signal is through signal sensing circuit, be sent to intelligent instrument and WT330 power meter, intelligent instrument is communicated by letter with upper IPC machine by fieldbus with WT330 power meter, the data that measure are sent into IPC machine, also have part signal to data collecting card, to send into IPC machine through signal condition, IPC machine carries out filtering, demonstration, processing to data again.System arranges special testing table.
Claims (10)
1. the frequency conversion experiment power supply system in a wind-power electricity generation machine testing, it is characterized in that: it comprises the Input Control Element being connected with 10KV power supply, the output terminal of Input Control Element is connected with rectification unit, DC bus, the first inversion unit, the first filter unit successively, and the output terminal of the first filter unit is connected with tested motor by output control unit; The output terminal of tested motor connects torque rotary speed sensor, then drags and accompany examination motor; After accompanying the examination output terminal of motor and the input end of described output control unit to be connected, then be connected with the second inversion unit with the second filter unit successively, the output terminal of the second inversion unit is connected on the DC bus of described rectification unit output terminal; Described Input Control Element, output control unit and the first inversion unit are connected with host computer with the second inversion unit; The input end of described tested motor with accompany examination motor output terminal be connected with current-voltage sampling system respectively.
2. the frequency conversion experiment power supply system in wind-power electricity generation machine testing according to claim 1, is characterized in that: described Input Control Element comprises input switch cabinet, rectifier transformer and power factor compensator.
3. the frequency conversion experiment power supply system in wind-power electricity generation machine testing according to claim 1, it is characterized in that: described rectification unit comprises three-phase bridge rectification circuit, resistance R 1, resistance R 2 and capacitor C1, described three-phase bridge rectification circuit one end resistance in series R1 is in parallel with resistance R 2 and capacitor C1 respectively again.
4. the frequency conversion experiment power supply system in wind-power electricity generation machine testing according to claim 1, is characterized in that: described the first inversion unit and the second inversion unit include IGBT module, diode and inversion electric capacity.
5. the frequency conversion experiment power supply system in wind-power electricity generation machine testing according to claim 1, is characterized in that: described the first filter unit and the second filter unit include filter transformer, cooling fan and filter capacitor.
6. the frequency conversion experiment power supply system in wind-power electricity generation machine testing according to claim 1, is characterized in that: described output control unit comprises transformer isolation cabinet, output transformer, output switch cabinet and measurement wiring cabinet.
7. the frequency conversion experiment power supply system in wind-power electricity generation machine testing according to claim 2, is characterized in that: described Input Control Element also disposes a phase-shift reactor.
8. the frequency conversion experiment power supply system in wind-power electricity generation machine testing according to claim 3, is characterized in that: in described rectification unit, and resistance R 1 and protection overtemperature switch in parallel.
9. the frequency conversion experiment power supply system in wind-power electricity generation machine testing according to claim 4, it is characterized in that: in described the first inversion unit and the second inversion unit, inversion electric capacity adopts self-cure type dry type film electric capacity, and all components and parts of inversion unit are all integrated on the PCB circuit board that adopts curing of coatings PROCESS FOR TREATMENT.
10. the frequency conversion experiment power supply system in wind-power electricity generation machine testing according to claim 5; it is characterized in that: in described the first filter unit and the second filter unit; filter transformer is dry-type transformer; filter transformer increases protection net or the protection cabinet with interlock in addition; the insulation rank of filter transformer is H level, and band intelligent temperature monitoring display and defencive function or touch-screen are unified to be shown.
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| CN201420481389.1U CN204008751U (en) | 2014-08-25 | 2014-08-25 | Frequency conversion experiment power supply system in wind-power electricity generation machine testing |
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| CN201420481389.1U CN204008751U (en) | 2014-08-25 | 2014-08-25 | Frequency conversion experiment power supply system in wind-power electricity generation machine testing |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841875A (en) * | 2017-03-01 | 2017-06-13 | 国家电网公司 | Three-Phase Distribution Transformers temperature rise test system and method based on alternating low frequency heating |
| CN107102262A (en) * | 2017-04-28 | 2017-08-29 | 华中科技大学 | A kind of linear motor performance test device and its control method |
| CN107728061A (en) * | 2017-11-10 | 2018-02-23 | 中机国际工程设计研究院有限责任公司 | Electric transmission experimental rig and system |
| CN108181526A (en) * | 2017-12-27 | 2018-06-19 | 上海辛格林纳新时达电机有限公司 | Test system for loading of frequency converter and inverter load test method |
-
2014
- 2014-08-25 CN CN201420481389.1U patent/CN204008751U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106841875A (en) * | 2017-03-01 | 2017-06-13 | 国家电网公司 | Three-Phase Distribution Transformers temperature rise test system and method based on alternating low frequency heating |
| CN107102262A (en) * | 2017-04-28 | 2017-08-29 | 华中科技大学 | A kind of linear motor performance test device and its control method |
| CN107728061A (en) * | 2017-11-10 | 2018-02-23 | 中机国际工程设计研究院有限责任公司 | Electric transmission experimental rig and system |
| CN108181526A (en) * | 2017-12-27 | 2018-06-19 | 上海辛格林纳新时达电机有限公司 | Test system for loading of frequency converter and inverter load test method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20150825 |
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| EXPY | Termination of patent right or utility model |