CN107783041A - The test of transducer drive electric system power supply disturbance tolerance, evaluation method and device - Google Patents

The test of transducer drive electric system power supply disturbance tolerance, evaluation method and device Download PDF

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Publication number
CN107783041A
CN107783041A CN201711204609.0A CN201711204609A CN107783041A CN 107783041 A CN107783041 A CN 107783041A CN 201711204609 A CN201711204609 A CN 201711204609A CN 107783041 A CN107783041 A CN 107783041A
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China
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power supply
measure
frequency converter
tested
controlling unit
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孙士涛
张�杰
雷雨
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State Grid Corp of China SGCC
North China Electric Power Research Institute Co Ltd
Electric Power Research Institute of State Grid Jibei Electric Power Co Ltd
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State Grid Corp of China SGCC
North China Electric Power Research Institute Co Ltd
Electric Power Research Institute of State Grid Jibei Electric Power Co Ltd
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Publication of CN107783041A publication Critical patent/CN107783041A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines
    • G01R31/343—Testing dynamo-electric machines in operation

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  • General Physics & Mathematics (AREA)
  • Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)

Abstract

Being powered the invention discloses transducer drive electric system, disturbance tolerance is tested, evaluation method and device, method include：1. anti-instantaneous voltage disturbance test：2. long duration voltage wave testing：3. harmonic disturbance is tested：Device includes：Power supply grid, Q1, switch Q2 are switched, Q3, power supply disturbance generator is switched, is tested frequency converter, tested motor, is dragged generator, filter, voltage compensating device, batteries, measure-controlling unit, base, rotating shaft, uninterruption power source UPS, grid-connected frequency converter.The method have the advantages that with accurate pressure regulation, frequency modulation and powerful fault simulation ability and energy feedback and rotating speed, torque coordination control and high-speed, high precision collection electrical quantity and mechanical quantity, the temperature rise of measurement motor winding, control software collection start and stop, direct torque, real-time display and recording, switch control, data analysis computing function can be realized.

Description

The test of transducer drive electric system power supply disturbance tolerance, evaluation method and device
Technical field
Powered the present invention relates to transducer drive electric system and disturb tolerance test, evaluation method and device, belong to electricity Power electronics and motor-drive technique field.
Background technology
At present, frequency converter obtains quite varied application in motor driving, control field, for saving electric energy, automatic control System and the aspect for improving device efficiency have vital effect.Such as coal industry use frequency control elevator, Various subsidiary engines such as blower fan that high-power milling train that metallurgy industry uses, the various motors that use of petrochemical industry, thermal power plant use, Water pump, feeder.These equipment are usually in underload and variable load operation state, by attached with frequency converters, can reach section The purpose of energy synergy.Prior art is directed to line voltage for test of the transducer drive electric system in the case where power supply disturbs Can transition include the ability that be continued to run with rapid drawdown low-converter of rising sharply, and prior art is directed to thermal power plant's low pressure subsidiary engine frequency converter Propose corresponding low voltage ride-through capability detection device and one of method, prior art uses extraordinary air-core transformer, pass through Change tap position to realize the Voltage Drop of different amplitudes, and using power electronic equipment as fictitious load, realize that energy returns Feedback；The two of prior art are directed to the on-the-spot test method of the subsidiary engine frequency converter of thermal power plant, and factory is connected on using disturbance generator With between bus and equipment under test or disturbance rejection equipment, the detection of low voltage ride-through capability is realized；The three of prior art propose Using power electronic equipment as disturbing generating device, three-phase, two-phase and single-phase fault can be simulated, and propose several shapes The loading scheme of formula.
The method that Publication No. CN105403910A patent application discloses a kind of on-the-spot test tunnel range of disturbance, it It is to choose adjacent two parallel tunnels in disturbance test section, one is vibroseis tunnel, and another is pressure measurement tunnel；Shaking Construction blasting hole in the tunnel of source, test system is arranged in each instrument connection in pressure measurement tunnel；Implement in vibroseis tunnel quick-fried It is broken, it is such as unconverted in the pressure changing of pressure measurement tunnel viewing cylindrical pliable capsule, illustrate not perturbed, after It is continuous that explosion is implemented to next blast hole, the like, untill pressure change occur in all cylindrical pliable capsules, now Cylindrical pliable capsule and the distance between blow-up point, be caused adjacent tunnel after explosive blasting range of disturbance.Existing Field is directed to specific seam mining environment, determines correlation distance parameter.
Publication No. CN105180205A patent application discloses a kind of oxygen-enriched combusting smoke circulating system control method, This method includes：Under oxygen-enriched combusting pattern, multiple control devices in smoke circulating system are carried out with open loop disturbance test；Really Influence degree of the fixed each control device to the systematic parameter of the oxygen-enriched combusting smoke circulating system；According to the influence Degree determines the control parameter set for the multiple control device, and the control parameter set includes multigroup control parameter；With And one group of control parameter is selected to be controlled each control device from the control parameter set.It can determine control Influence of the equipment to smoke circulating system.
In summary, due to power network power supply instability, the use of a large amount of power electronic equipments, load it is non-linear, large-scale More serious power quality problem often be present, exist in the reason for frequent starting of motor, the partial electric grid residing for frequency converter Following shortcoming：
1. voltage pulsation：Such as coal industry due to the frequent starting of Large Copacity elevator, line voltage frequent fluctuation it is bright Aobvious offrating.
2. imbalance of three-phase voltage：Such as the dissymmetrical load of metallurgy industry three-phawse arc furnace causes imbalance of three-phase voltage Degree is very high.
3. Voltage Drop：It is commonly called as shaking electricity, it is common in petrochemical industry, it is due to the grid short circuit of power plant for self-supply of petroleum chemical enterprise Failure and motor cluster quick load change cause short time voltage fall in addition interrupt.
4. voltage waveform distortion：It is due to substantial amounts of harmonic pollution, such as the arc length of the electric arc furnaces in metallurgy industry is not advised Change then causes line voltage to contain substantial amounts of harmonic wave.
5. frequency shift (FS)：Petrochemical industry generally has the power plant for self-supply of cogeneration of heat and power, because certain reason is made with system sectionalizing Into isolated power grid, when now the undercapacity of generator is to meet load needs, isolated network frequency can be caused to decline or even power and collapsed Burst.
On the one hand problem above causes harmonic pollution and power factor to power network and reduced, on the other hand in supply district Other equipment cause harm, cause transducer drive motor device shut down, loss noise and vibration increase even original paper damage The problem of.Specifically have the disadvantage that：
1. Voltage Drop.Voltage Drop can frequently result in frequency converter locking output.Most of low voltage frequency converter is short in voltage When dropping to 85%~90% rated voltage, will the output of latch power electronic component because of under-voltage protection, cause Shut down.
2. supply waveform distorts, harmonic content is big.The Severe distortion of supply waveform, such as the moment on voltage sinusoidal Breach can influence the triggering of frequency converter rectifier and inverter controlled member, it is impossible to normally detect Trigger Angle, cause protection to shut down.
3. imbalance of three-phase voltage.Three-phase input voltage imbalance can cause frequency changer direct current bus voltage substantially to fluctuate, And then imbalance is caused to the supply voltage of motor, cause motor abnormality to generate heat.
In order to improve the tolerance of power supply disturbance low-converter motor system, many kinds of measures is taken to be improved：
1. uninterruption power source UPS.When frequency converter input voltage falls, input side is exchanged by frequency converter is serially connected in Uninterrupted power source, there is provided the power supply of frequency converter in short-term, realize low voltage crossing.
2. install voltage compensating device additional.Including DC voltage compensation device and AC dynamic electric voltage recovery device (DVR) Voltage compensating device.When the inverter supply quality of power supply deteriorates, using DC side boost booster circuits or AC string The compensation circuit of connection realizes the normal work of frequency converter directly to frequency converter direct power supply in short-term.
3. batteries are used, when the inverter supply quality of power supply deteriorates using batteries directly to frequency converter direct current Bussed supply, the normal work of frequency converter is realized in short-term.
4. use filter.Various filters are installed additional in converter power supply input side, can improve the confession of frequency converter Electrical waveform, reduce the influence of wave distortion.
The content of the invention
It is an object of the invention to provide a kind of transducer drive electric system that can overcome above-mentioned technical problem to power Disturb tolerance test, evaluation method and device, the present invention can test frequency converter's motor system to the various disturbances of power network Tolerance and various corrective measures validity and can effectively simulation it is various power supply disturbances be the quality of power supply deterioration show As, while transducer drive electric system or frequency converter are obtained by measurement motor and the various parameters of frequency converter by analysis The tolerance evaluation of motor system.
The explanation of technical terms of the present invention is as follows：
Transducer drive electric system：It is the three phase motor system being powered by frequency converter, motor includes mouse cage Formula asynchronous machine, permagnetic synchronous motor, signified transducer drive electric system includes tested frequency converter, tested electricity in of the invention The whole system of motivation and disturbance rejection device composition.
Power supply disturbance：It is that the quality of power supply of power supply declines phenomenon, including three-phase, two-phase, single-phase voltage are symmetrically and not Symmetrical rapid drawdown and rise sharply, voltage pulsation, frequency shift (FS), harmonic pollution.
Tolerance：Transducer drive electric system in the case where power supply disturbs can continuous service, motor output torque and turn Speed, temperature rise occur without flagrant change.
Disturbance rejection device：Be in order to improve transducer drive electric system to power supply disturbance tolerance and increased dress Put, including the AC or DC voltage compensation device, batteries, UPS that reactance voltage falls, improve input power harmonic wave The various filters of distortion.
Voltage pulsation：It is a series of variation of the i.e. virtual value of voltage root-mean-square valve or continuous change.
Uninterruption power source is referred to as UPS.
Transducer drive electric system power supply disturbance tolerance of the present invention is tested, evaluation method comprises the following steps：
Step 1, method of testing：
11. anti-instantaneous voltage disturbance test：
111. measure-controlling unit provides instruction, closure switch Q1, switch Q2；
112. measure-controlling unit gives rotating speed of target, sent to tested frequency converter and start order, be tested frequency converter dragging It is tested motor and is dragged generator zero load soft start to rotating speed of target；
113. measure-controlling unit provides instruction, closure switch Q3, system grid connection；
114. torque reference is slowly increased on measure-controlling unit, system loads to target torque；
115. measure-controlling unit to power supply disturbance generator send disturbance instruction, including Voltage Drop amplitude and it is lasting when Between and caused by falling it is separate, power supply disturbance generator produces the time of setting and the Voltage Drop of amplitude as requested, is Three-phase symmetrical, asymmetry are fallen, two-phase is fallen, it is single-phase fall, it is automatic to recover to normal power supply after falling end；
116. slowly reduce torque reference on measure-controlling unit to zero；
117. measure-controlling unit sends halt instruction to tested frequency converter, whole system is shut down；
118. measure-controlling unit disconnects each switch successively according to switch Q3, switch Q2, switch Q1 order；
119. during disturbance, determine tested frequency converter with the presence or absence of shutdown by manually observing；Measure-controlling unit The output current of the tested frequency converter of collection, voltage waveform, calculate power output；By gathering dtc signal and by Fourier point Analysis obtains the average value and each harmonic component of torque；Negative sequence field in motor be present because different falling may result in, Cause that the motor feels hot, after test terminates, measure the resistance of tested motor stator winding, measurement control using direct resistance metering instrument at once Unit processed calculates winding temperature according to winding resistance, obtains the temperature rise of motor stator winding.In summary data draw system Anti- instantaneous voltage disturbance tolerance evaluation.
12. long duration voltage wave testing：
121. measure-controlling unit provides instruction, closure switch Q1, switch Q2；
122. measure-controlling unit gives rotating speed of target, sent to tested frequency converter and start order, be tested frequency converter dragging It is tested motor and is dragged generator zero load soft start to rotating speed of target；
123. measure-controlling unit provides instruction, closure switch Q3, system grid connection；
124. torque reference is slowly increased on measure-controlling unit, system loads to target torque；
125. measure-controlling unit sends disturbance instruction to power supply disturbance generator, including changes frequency, variation, continues Time, power supply disturbance generator is on demand at the variation frequency that setting is produced in dozens of minutes[4]And variation[4]Voltage wave It is dynamic.It is automatic to recover to normal power supply after fluctuation terminates.
126. slowly reduce torque reference on measure-controlling unit to zero；
127. measure-controlling unit sends halt instruction to tested frequency converter, whole system is shut down；
128. measure-controlling unit disconnects each switch successively according to switch Q3, switch Q2, switch Q1 order；
129. during test, frequency converter is tested during determining disturbance with the presence or absence of shutdown by manually observing；Measurement control The output current of unit collection tested motor processed, voltage waveform, by the power output that frequency converter is calculated；Turned by collection Square signal, to calculate the torque of tested motor relative to the fluctuating range under clean supply；Due to prolonged voltage wave Move the temperature rise of the abnormal heating, after the same method measurement motor winding that can equally cause winding.In summary data are drawn The anti-long duration voltage fluctuation tolerance evaluation of system.
13. harmonic disturbance is tested：
131. measure-controlling unit provides instruction, closure switch Q1, switch Q2；
132. measure-controlling unit gives rotating speed of target, sent to tested frequency converter and start order, be tested frequency converter dragging It is tested motor and is dragged generator zero load soft start to rotating speed of target；
133. measure-controlling unit provides instruction, closure switch Q3, system grid connection；
134. torque reference is slowly increased on measure-controlling unit, system loads to target torque；
135. measure-controlling unit sends disturbance instruction to power supply disturbance generator, including harmonic amplitude, overtone order, holds Continuous time, power supply disturbance generator pass through the method simulating grid on demand at superimposed voltage harmonic wave on normal voltage waveform Wave distortion.It is automatic to recover to normal power supply after distortion terminates.
136. slowly reduce torque reference on measure-controlling unit to zero；
137. measure-controlling unit sends halt instruction to tested frequency converter, whole system is shut down；
138. measure-controlling unit disconnects each switch successively according to switch Q3, switch Q2, switch Q1 order；
139. during test, determine tested frequency converter with the presence or absence of shutdown by manually observing；Measure-controlling unit is adopted Collect output current, the waveform of voltage of tested motor, and calculate the power output of tested frequency converter；The dtc signal of collection is entered Row frequency analysis, analyze the torque DC component harmony wave component of tested motor；Likewise, harmonic voltage is too high to cause electricity The temperature rise increase of machine, after test terminates, also answers the temperature rise of measurement motor.In summary data show that the anti-harmonic distortion of system is disturbed Dynamic tolerance evaluation.
Step 2, evaluation method：
Evaluation method of the present invention be for transducer drive electric system power supply disturb under tolerance and to be Unite based on whether shutting down, the torque of integrated system or the temperature rise of power swing amplitude and motor are evaluated for the tolerance of index Method, comprise the following steps that：
21. in the case where power supply disturbs, when there is shutting down phenomenon in transducer drive electric system, tolerance evaluation number Stol =0, that is, think that system disturbs no tolerance for power supply.
22. power supply disturb under, when transducer drive electric system remains to continuous service, tolerance evaluation number according to Below equation carries out value：
StolIt is tolerance evaluation number；
kfIt is fundamental wave torque (power) fluctuation weight coefficient；
T1Be measurement fundamental wave torque (power), DC component；
TsIt is torque (power) setting value；
khIt is harmonic torque (power) fluctuation weight coefficient；
TiIt is i subharmonic torque (power), of ac；
ktIt is temperature rise weight coefficient；
kpIt is temperature rise gain；
Δ t is the motor temperature rise of measurement；
tmaxIt is the temperature limit of motor；
tsetIt is the temperature rise controlling value of system motor under normal power supply；
E is math constant, i.e. the truth of a matter of natural logrithm function.
The output torque for motor represented for constant torque load, T, for constant power load, what T was represented is motor Power output.
Tolerance evaluation using the deduction on basic score value 100 form, torque or the fluctuation of power, harmonic torque or Power is that is, torque or the pulsation of power, the temperature rise of motor are all deduction item for tolerance.Torque or work( Rate is made up of fundamental wave torque harmonic torque.In theory, the torque of motor output should be steady unchanged, is DC quantity, this part Torque is defined as fundamental wave torque.In the case where power supply disturbs, fundamental wave torque is introduced relative to the ratio of setting torque as evaluation index A part, be multiplied by the weight coefficient k of settingfInfluence of the fluctuation of system output to tolerance can be reflected.In addition, when power supply When voltage occurs uneven, or under harmonic wave supply voltage, the harmonic component of each time occurs in the output of motor, by torque Signal carries out Fourier analysis, can obtain the harmonic torque of each time, and this harmonic torque can reflect shaking for motor well Dynamic and noise, the root-mean-square valve of each harmonic torque is taken with setting part of the ratio of torque as evaluation index, and multiply With the weight coefficient k of settinghInfluence of the harmonic torque to tolerance can be reflected.
The temperature rise of motor is the important indicator of tolerance, because insulation and life-span of the temperature for motor have a significant impact. What the present invention took is the form of exponential function.When the temperature rise Δ t under powering extremely is less than the temperature rise controlling value under normal power supply tsetWhen, influence of the temperature rise for motor is smaller, belongs to normal range (NR), and now the power of exponential function is negative, and numerical value is smaller, and becomes Change less, the influence total to evaluation number is more gentle；When the temperature rise Δ t under powering extremely is more than the temperature rise control under normal power supply Value t processedsetBut it is less than temperature limit tmaxWhen, influence of the temperature rise for motor is very big, and now the power of exponential function is just, value with The increase for temperature rise increases rapidly, and tolerance evaluation number will be obviously reduced.Pass through temperature rise gain coefficient kpTemperature rise can be adjusted To the pace of change of evaluation coefficient.
In addition, kf、kh、ktIt can suitably be chosen according to system situation, reacted the weight relationship between three. khIt is less than kfAnd kt.Using above-mentioned evaluation method, can concentrated expression in the case where power supply disturbs, the service ability of system, contribute it is steady Qualitative, vibration and the performance of temperature rise, obtain the tolerance evaluation number of system.
Based on above the method for the invention, device of the present invention includes：Power supply grid, switch Q1, switch Q2, switch Q3, power supply disturbance generator, it is tested frequency converter, tested motor, is dragged generator, filter, voltage compensating device, electric power storage Pond group, measure-controlling unit, base, rotating shaft, uninterruption power source UPS, grid-connected frequency converter.Tested frequency converter respectively with not between Disconnected power supply, voltage compensating device, filter, batteries, measure-controlling unit, grid-connected frequency converter, tested motor, Generator is dragged to connect；Power supply disturbance generator is connected with measure-controlling unit, voltage compensating device, filter respectively.
Measure-controlling unit includes：Host computer, sample circuit, signal conditioning circuit, A/D converter, digital processing chip, Communication bus, rotating shaft, photoelectric encoder, pulse processing circuit, tested Frequency Converter Control chip, pulse driving circuit, inversion electricity Road, torque sensor, grid-connected Frequency Converter Control chip, power supply disturbance generator control chip, instrument for measuring DC resistance.Sampling electricity Road, signal conditioning circuit, A/D converter, digital processing chip are connected by communication bus with host computer；Rotating shaft, photoelectric coding Device, pulse processing circuit, tested Frequency Converter Control chip are connected by communication bus with host computer；Rotating shaft, torque sensor, simultaneously Net Frequency Converter Control chip is connected by communication bus with host computer；Inverter circuit, pulse driving circuit, power supply disturbance generator Control chip is connected by communication bus with host computer.
The workflow and principle of the present invention is as follows：Power supply grid is based on back-to-back power electronic equipment through switching Q1 connections Power supply disturbance generator, power supply disturbance generator through switch Q2 connections be tested frequency converter, for be tested inverter supply, be tested change The tested motor of frequency device connection, electric energy and rotating speed control are provided for tested motor, and generator conduct is dragged with rotating shaft connection The load of tested motor, under the dragging of tested motor, dragged generator to send electric energy, generator is dragged by being connected to The back-to-back grid-connected frequency converter of stator side and switch Q3, through over commutation and inversion by electric energy feedback to power supply grid, it is arranged on Among container.During actual test, filter is applied between power supply disturbance generator and tested frequency converter exchange input side, Voltage compensating device is arranged between power supply disturbance generator and tested frequency converter direct current or ac bus, plays voltage support Effect, batteries are connected in parallel on the dc bus of tested frequency converter, and bypass supporting role is played in disturbance, uninterrupted to supply Power supply UPS is connected between power supply grid and tested frequency converter exchange input side, the automatic power when powering disturbance, between playing not The effect of cut-off electricity.
On the one hand the power supply disturbance generator can realize the normal power supply of tested frequency converter, on the other hand can produce Power supply disturbance.Power supply disturbance generator controls power electronic devices entirely using power stage, has four quadrant running ability, can realize Energy feedback, three-phase voltage amplitude, phase can be separately adjustable, possess that adjustable voltage, frequency-adjustable, harmonic wave be controllable, power network mould The function of plan, except various types of Voltage Drops caused by common power supply trouble, including three-phase symmetrical and asymmetry, two-phase, It is single-phase fall beyond, additionally it is possible to simulate the frequency fluctuation of local power power network, harmonic pollution, the quality of power supply of voltage pulsation show As.
The power supply disturbance generator parameter is as follows：
1. power：20kW；
2. input voltage：Three-phase 380V ± 15；
3. ac output voltage：0~690V three-phases are separately adjustable；
4. 2~50 subharmonic can be superimposed on the basis of fundamental wave；
5. programmable voltage amplitude, frequency, phase；
6. 0~360 ° of voltage-phase is adjustable, 1 ° of step-length is adjusted；
7. alternating voltage regulation step-length 0.1V；
8. output voltage frequency 0.1Hz~400Hz, regulation step-length 0.01Hz；
9. rate-adaptive pacemaker precision≤0.01Hz；
10. power supply voltage stabilizing rate≤0.5%；
11. setting total THD 0~20%, a variety of harmonic combinations, single harmonic component accounting is set respectively；
12. voltage distortion degree≤1% (linear load)；
13. negative phase-sequence degree of unbalancedness 0~100%, resolution are set：0.1%；
14. set duration 10ms~10min, resolution：1ms；
15. fluctuation flickering amplitude Pst=1~10 are set；
16. overload capacity：110%In:1min；120%In:30s；2In:2s.
Tested frequency converter：Electric energy and start and stop, rotating speed control are provided for tested motor.
Tested motor：One of test object for whole system, as motor.
Disturbance rejection device：Resist the device of grid disturbance, such as the voltage compensating device that reactance voltage falls, input side it is various Supporting filter, batteries, uninterruption power source UPS.
Dragged generator and tested motor coaxially connected, as the load of tested motor, in addition to base, rotating shaft Part.
It is described to be dragged generator parameter as follows：
1. rated power：22kW；
2. rated voltage：380V；
3. nominal torque：142.93N.m；
4. rated current：42.5A；
5. rated speed：1480r/min；
6. frequency range：Permanent torque 5~50Hz of mode, 50~100Hz of invariable power mode；
7. connection：Δ.
Grid-connected frequency converter is four quadrant convertor, connects and is dragged generator unit stator side, the exchange that generator will be dragged to send The industrial-frequency alternating current that electricity is changed into 50Hz through over commutation and inversion is incorporated to power supply grid, realizes energy feedback, improves a whole set of system The efficiency of system, while the closed-loop control of torque is realized, so as to control grid-connected power, realize load control.
Described to switch the switch connection for realizing electric loop, the switch is included between power supply and power supply disturbance generator Q1, the switch Q2 between power supply disturbance generator and tested frequency converter are switched, and between grid-connected frequency converter and power supply grid Grid-connected switch Q3, switch use miniature circuit breaker form, can resist the rush of current of divide-shut brake moment, prevent from damaging electric power electricity Sub- equipment.
The measure-controlling unit is used to realize measurement, processing and the display of analog quantity, switch control, turn of load system Square controls and the disturbance of power supply disturbance generator controls, and is divided into acquisition zone, viewing area, data calculating area and control operation Area.As shown in figure 3, the electric simulation amount of voltage x current is changed into and turned suitable for A/D through over-sampling circuit and signal conditioning circuit The analog input signal of parallel operation, data signal is converted to by high-precision A/D converter, data signal passes to digital processing Chip carries out the processing and calculating of data, is then uploaded to host computer by communication bus and is shown and stored；Positioned at rotating shaft On photoelectric encoder a series of grating pulse is exported by the rotation of rotating shaft, be transferred to after pulse processing circuit is handled Tested Frequency Converter Control chip, by counting to get the tach signal of motor, is entered by communication bus real-time Transmission to host computer Row display；Moment of torsion active force is changed into electric signal transmission to grid-connected Frequency Converter Control core by the torque sensor in rotating shaft Piece, grid-connected Frequency Converter Control chip are shown torque numerical value real-time Transmission is surveyed and deposited to host computer by communication bus Storage；The three-phase stator winding connection instrument for measuring DC resistance of tested motor, the threephase stator resistance value measured are total by communicating Line is transferred to host computer, for calculating the temperature rise of stator winding.Turned by each voltage x current of display real-time display of host computer Fast torque profile and numerical value and the opening and closing state respectively switched, while the secondary calculating amount of power can be shown.
Data calculate area and calculate each performance number according to the voltage x current of collection, are calculated according to tested motor stator resistance value The temperature rise of tested motor, while Fourier analysis is carried out to torque, according to each harmonic torque component of temperature rise, Fourier analysis And related given parameters calculate tolerance evaluation number according to formula (1).
Control operation area provides various instructions, and the rotating speed of host computer output, start and stop instruction are transferred to by communication bus Tested Frequency Converter Control chip, is tested Frequency Converter Control chip output switch control signal, by the arteries and veins being tested inside frequency converter After rushing drive circuit amplification, the inverter circuit that is transferred to inside tested frequency converter, so as to realize the rotating speed of tested motor, start and stop Control；The torque instruction of host computer output is transferred to grid-connected Frequency Converter Control chip, grid-connected Frequency Converter Control by communication bus Pulse driving circuit of the chip according to torque control algorithm output switching signal to inside, the inversion of amplified output to inside Circuit is dragged the direct torque of generator so as to realize；The disturbance of host computer output occurs instruction and is transferred to confession by communication bus Electric disturbance generator control chip, the pulse amplifying circuit and internal inverter circuit to tested frequency converter of inside are also passed through, Produce corresponding power supply disturbance；Meanwhile host computer can also the division of output switch instruct to the control loop of switch internal, control Switch contact processed, realize switch control.
Measure-controlling unit is provided with display and is built-in with host computer, there is electrical wiring schematic diagram on guidance panel, The state of switch has indicator lamp instruction, and test data can export the convenient progress of file of * .txt, * .csv, * .xls form Processing.Control software uses LABVIEW programmings.Meanwhile measure-controlling unit is equipped with power supply disturbance generator and grid-connected Overvoltage, the overcurrent protection of frequency converter, short-circuit protection, overheat protector, dc bus overvoltage protection.
Measure-controlling unit parameter：
1.A/D converter acquisition channels：16 tunnels；
2.A/D converter sampling frequencies：10kHz；
3.A/D converter resolutions：16；
4. torque sensor measurement accuracy：± 0.2%；
5. the maximum measurement torque of torque sensor：200N.m.
Device of the present invention is arranged on to facilitate transhipment in container, and the container is twenty equivalent unit, Degree of protection IP54, it is adapted to outdoor long-term storage whole system.In the container by place using function be divided into Office Area, Simultaneously there is visible marking in battery limits, the region of test section 3.Container is equipped with corresponding conditioner, is provided for engineering staff Ideal working environment.The container is equipped with corresponding illumination, fire-fighting, emergency lighting device.The container has outer Portion's power interface, meet the needs of its illumination and test electricity consumption.
The present invention superior effect be：
1. the object that the present invention is directed to is a kind of transducer drive electric system, both frequency converter, motor are disturbed in power network Response under dynamic can be tested and evaluated.
2. power supply disturbance proposed by the invention is a kind of power quality problem of broad sense, including voltage transient, voltage wave Waveform distortion of the power supply network, frequency shift (FS) caused by dynamic flickering, high content harmonic wave, test be when the quality of power supply declines frequency converter with The tolerance of motor.Used power electronics disturbance generator can realize described quality of power supply phenomenon by control algolithm Simulation.
3. tolerance proposed by the present invention includes whether to shut down, goes out fluctuation, the evaluation index that temperature rise is combined, pass through phase The measuring system answered is acquired to critical data, and proposes corresponding appraisement system for tolerance.For frequency converter Speech, moment of voltage falls, the distortion of network wave can directly result in frequency converter because under-voltage protection, triggering failure and locking stops Machine, for motor, voltage it is long when fluctuation, harmonic wave increase, it is asymmetric fall can all cause motor go out fluctuation and temperature Increase is risen, tolerance evaluation is a kind of comprehensive performance evaluation that whether can make user's requirement to motor inverter system.
4. the present invention can make power electronic equipment have a more stable building ring using container as detection environment Border, while and can convenience in transport；With accurate pressure regulation, frequency modulation and powerful fault simulation ability and energy feedback can be realized Controlled with rotating speed, torque coordination to meet measurement condition demand；High-speed, high precision collection electrical quantity and mechanical quantity, survey can be realized Measure temperature rise, control software collection start and stop, direct torque, real-time display and the recording of machine winding, switch controls, data analysis meter Calculate function；Comfortable test environment can be provided and operation monitoring is convenient and swift and realize remote operation.Energy of the invention is extensively Ground is applied to the correlative technology field of thermal power plant, petrochemical industry Important Auxiliary equipment and its frequency converter test.
Brief description of the drawings
Fig. 1 is the structural representation of device of the present invention；
Fig. 2 is the flow chart of the method for the invention；
Fig. 3 is the structural representation of the measure-controlling unit of invention described device.
Embodiment
Embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.Transducer drive department of electrical engineering of the present invention The test of system power supply disturbance tolerance, evaluation method comprise the following steps：
Step 1, method of testing：
11. anti-instantaneous voltage disturbance test：
111. measure-controlling unit provides instruction, closure switch Q1, switch Q2；
112. measure-controlling unit gives rotating speed of target, sent to tested frequency converter and start order, be tested frequency converter dragging It is tested motor and is dragged generator zero load soft start to rotating speed of target；
113. measure-controlling unit provides instruction, closure switch Q3, system grid connection；
114. torque reference is slowly increased on measure-controlling unit, system loads to target torque；
115. measure-controlling unit to power supply disturbance generator send disturbance instruction, including Voltage Drop amplitude and it is lasting when Between and caused by falling it is separate, power supply disturbance generator produces the time of setting and the Voltage Drop of amplitude as requested, is Three-phase symmetrical, asymmetry are fallen, two-phase is fallen, it is single-phase fall, it is automatic to recover to normal power supply after falling end；
116. slowly reduce torque reference on measure-controlling unit to zero；
117. measure-controlling unit sends halt instruction to tested frequency converter, whole system is shut down；
118. measure-controlling unit disconnects each switch successively according to switch Q3, switch Q2, switch Q1 order；
119. during disturbance, determine tested frequency converter with the presence or absence of shutdown by manually observing；Measure-controlling unit The output current of the tested frequency converter of collection, voltage waveform, calculate power output；By gathering dtc signal and by Fourier point Analysis obtains the average value and each harmonic component of torque；Negative sequence field in motor be present because different falling may result in, Cause that the motor feels hot, after test terminates, measure the resistance of tested motor stator winding, measurement control using direct resistance metering instrument at once Unit processed calculates winding temperature according to winding resistance, obtains the temperature rise of motor stator winding.In summary data draw system Anti- instantaneous voltage disturbance tolerance evaluation.
12. long duration voltage wave testing：
121. measure-controlling unit provides instruction, closure switch Q1, switch Q2；
122. measure-controlling unit gives rotating speed of target, sent to tested frequency converter and start order, be tested frequency converter dragging It is tested motor and is dragged generator zero load soft start to rotating speed of target；
123. measure-controlling unit provides instruction, closure switch Q3, system grid connection；
124. torque reference is slowly increased on measure-controlling unit, system loads to target torque；
125. measure-controlling unit sends disturbance instruction to power supply disturbance generator, including changes frequency, variation, continues Time, power supply disturbance generator is on demand at the variation frequency that setting is produced in dozens of minutes[4]And variation[4]Voltage wave It is dynamic.It is automatic to recover to normal power supply after fluctuation terminates.
126. slowly reduce torque reference on measure-controlling unit to zero；
127. measure-controlling unit sends halt instruction to tested frequency converter, whole system is shut down；
128. measure-controlling unit disconnects each switch successively according to switch Q3, switch Q2, switch Q1 order；
129. during test, frequency converter is tested during determining disturbance with the presence or absence of shutdown by manually observing；Measurement control The output current of unit collection tested motor processed, voltage waveform, by the power output that frequency converter is calculated；Turned by collection Square signal, to calculate the torque of tested motor relative to the fluctuating range under clean supply；Due to prolonged voltage wave Move the temperature rise of the abnormal heating, after the same method measurement motor winding that can equally cause winding.In summary data are drawn The anti-long duration voltage fluctuation tolerance evaluation of system.
13. harmonic disturbance is tested：
131. measure-controlling unit provides instruction, closure switch Q1, switch Q2；
132. measure-controlling unit gives rotating speed of target, sent to tested frequency converter and start order, be tested frequency converter dragging It is tested motor and is dragged generator zero load soft start to rotating speed of target；
133. measure-controlling unit provides instruction, closure switch Q3, system grid connection；
134. torque reference is slowly increased on measure-controlling unit, system loads to target torque；
135. measure-controlling unit sends disturbance instruction to power supply disturbance generator, including harmonic amplitude, overtone order, holds Continuous time, power supply disturbance generator pass through the method simulating grid on demand at superimposed voltage harmonic wave on normal voltage waveform Wave distortion.It is automatic to recover to normal power supply after distortion terminates.
136. slowly reduce torque reference on measure-controlling unit to zero；
137. measure-controlling unit sends halt instruction to tested frequency converter, whole system is shut down；
138. measure-controlling unit disconnects each switch successively according to switch Q3, switch Q2, switch Q1 order；
139. during test, determine tested frequency converter with the presence or absence of shutdown by manually observing；Measure-controlling unit is adopted Collect output current, the waveform of voltage of tested motor, and calculate the power output of tested frequency converter；The dtc signal of collection is entered Row frequency analysis, analyze the torque DC component harmony wave component of tested motor；Likewise, harmonic voltage is too high to cause electricity The temperature rise increase of machine, after test terminates, also answers the temperature rise of measurement motor.In summary data show that the anti-harmonic distortion of system is disturbed Dynamic tolerance evaluation.
Step 2, evaluation method：
Evaluation method of the present invention be for transducer drive electric system power supply disturb under tolerance and to be Unite based on whether shutting down, the torque of integrated system or the temperature rise of power swing amplitude and motor are evaluated for the tolerance of index Method, comprise the following steps that：
21. in the case where power supply disturbs, when there is shutting down phenomenon in transducer drive electric system, tolerance evaluation number Stol =0, that is, think that system disturbs no tolerance for power supply.
22. power supply disturb under, when transducer drive electric system remains to continuous service, tolerance evaluation number according to Below equation carries out value：
StolIt is tolerance evaluation number；
kfIt is fundamental wave torque (power) fluctuation weight coefficient；
T1Be measurement fundamental wave torque (power), DC component；
TsIt is torque (power) setting value；
khIt is harmonic torque (power) fluctuation weight coefficient；
TiIt is i subharmonic torque (power), of ac；
ktIt is temperature rise weight coefficient；
kpIt is temperature rise gain；
Δ t is the motor temperature rise of measurement；
tmaxIt is the temperature limit of motor；
tsetIt is the temperature rise controlling value of system motor under normal power supply；
E is math constant, i.e. the truth of a matter of natural logrithm function.
The output torque for motor represented for constant torque load, T, for constant power load, what T was represented is motor Power output.
Tolerance evaluation using the deduction on basic score value 100 form, torque or the fluctuation of power, harmonic torque or Power is that is, torque or the pulsation of power, the temperature rise of motor are all deduction item for tolerance.Torque or work( Rate is made up of fundamental wave torque harmonic torque.In theory, the torque of motor output should be steady unchanged, is DC quantity, this part Torque is defined as fundamental wave torque.In the case where power supply disturbs, fundamental wave torque is introduced relative to the ratio of setting torque as evaluation index A part, be multiplied by the weight coefficient k of settingfInfluence of the fluctuation of system output to tolerance can be reflected.In addition, when power supply When voltage occurs uneven, or under harmonic wave supply voltage, the harmonic component of each time occurs in the output of motor, by torque Signal carries out Fourier analysis, can obtain the harmonic torque of each time, and this harmonic torque can reflect shaking for motor well Dynamic and noise, the root-mean-square valve of each harmonic torque is taken with setting part of the ratio of torque as evaluation index, and multiply With the weight coefficient k of settinghInfluence of the harmonic torque to tolerance can be reflected.
The temperature rise of motor is the important indicator of tolerance, because insulation and life-span of the temperature for motor have a significant impact. What the present invention took is the form of exponential function.When the temperature rise Δ t under powering extremely is less than the temperature rise controlling value under normal power supply tsetWhen, influence of the temperature rise for motor is smaller, belongs to normal range (NR), and now the power of exponential function is negative, and numerical value is smaller, and becomes Change less, the influence total to evaluation number is more gentle；When the temperature rise Δ t under powering extremely is more than the temperature rise control under normal power supply Value t processedsetBut it is less than temperature limit tmaxWhen, influence of the temperature rise for motor is very big, and now the power of exponential function is just, value with The increase for temperature rise increases rapidly, and tolerance evaluation number will be obviously reduced.Pass through temperature rise gain coefficient kpTemperature rise can be adjusted To the pace of change of evaluation coefficient.
In addition, kf、kh、ktIt can suitably be chosen according to system situation, reacted the weight relationship between three. khIt is less than kfAnd kt.Using above-mentioned evaluation method, can concentrated expression in the case where power supply disturbs, the service ability of system, contribute it is steady Qualitative, vibration and the performance of temperature rise, obtain the tolerance evaluation number of system.
Based on above the method for the invention, apparatus structure of the present invention is as shown in Figure 1, Figure 3：Device of the present invention Including：Power supply grid, Q1, switch Q2 are switched, Q3, power supply disturbance generator is switched, is tested frequency converter, tested motor, is dragged Generator, filter, voltage compensating device, batteries, measure-controlling unit, base, rotating shaft, uninterruption power source UPS, grid-connected frequency converter.Tested frequency converter respectively with uninterruption power source, voltage compensating device, filter, batteries, Measure-controlling unit, grid-connected frequency converter, it is tested motor, is dragged generator to connect；Power supply disturbance generator is controlled with measurement respectively Unit processed, voltage compensating device, filter connection.
As shown in Figure 3：Measure-controlling unit includes：Host computer, sample circuit, signal conditioning circuit, A/D converter, number Word processing chip, communication bus, rotating shaft, photoelectric encoder, pulse processing circuit, tested Frequency Converter Control chip, pulsed drive Circuit, inverter circuit, torque sensor, grid-connected Frequency Converter Control chip, power supply disturbance generator control chip, D.C. resistance are surveyed Try instrument.Sample circuit, signal conditioning circuit, A/D converter, digital processing chip are connected by communication bus with host computer；Turn Axle, photoelectric encoder, pulse processing circuit, tested Frequency Converter Control chip are connected by communication bus with host computer；Rotating shaft, torsion Square sensor, grid-connected Frequency Converter Control chip are connected by communication bus with host computer；Inverter circuit, pulse driving circuit, confession Electric disturbance generator control chip is connected by communication bus with host computer.
The workflow and principle of the present invention is as follows：As shown in figure 1, power supply grid is based on electricity back-to-back through switching Q1 connections The power supply disturbance generator of power electronic installation, power supply disturbance generator are tested frequency converter through switching Q2 connections, to be tested frequency converter Power supply, is tested the tested motor of frequency converter connection, electric energy and rotating speed control is provided for tested motor, with being dragged for rotating shaft connection Load of the generator as tested motor, under the dragging of tested motor, is dragged generator to send electric energy, by being connected to The back-to-back grid-connected frequency converter and switch Q3 of generator unit stator side are dragged, through over commutation and inversion by electric energy feedback to electricity of powering Net, among container.In Fig. 1, during actual test, filter is applied to power supply disturbance generator and tested frequency converter Between exchanging input side, voltage compensating device be arranged on power supply disturbance generator and tested frequency converter direct current or ac bus it Between, play a part of voltage support, batteries are connected in parallel on the dc bus of tested frequency converter, and bypass branch is played in disturbance Support is acted on, and uninterruption power source UPS is connected between power supply grid and tested frequency converter exchange input side, when powering disturbance certainly Dynamic power supply, plays a part of uninterrupted power supply.
The measure-controlling unit of device of the present invention as shown in figures 1 and 3, Fig. 1 illustrate measure-controlling unit with The connection of device of the present invention, Fig. 3 are the concrete structure of measure-controlling unit.Measure-controlling unit is used for gathering shown in Fig. 1 All kinds of parameters, include the stator resistance value of the electrical quantity of voltage x current, the mechanical quantity of rotational speed and torque and motor, by Fig. 3 Shown each road signal transacting link transmits the parameter of collection to host computer；Host computer is the control unit of measure-controlling unit Point, effect is to realize that control occurs for disturbance, by the communication reality with tested frequency converter by disturbing the communication of generator with power supply Existing rotating speed, start-up and shut-down control, direct torque is realized by the communication with grid-connected frequency converter, real by the communication with switch control circuit Now switch control, and by measure-controlling unit upload data carry out record storage show, and according to evaluation algorithms draw by Survey the power supply disturbance tolerance evaluation of object.Fig. 2 is the testing process of device of the present invention.During test, system is first normal Power supply is lower to pass through rotating speed, start-up and shut-down control by electric motor starting and stably in defined rotating speed, is then realized and loaded by direct torque, Then it is power quality problem by the grid disturbance of disturbance generation control generation setting time, setting index request, disturbs and tie Shu Hou, device of the present invention are shut down by PC control.During test, whether measurement motor shuts down, the torque of motor becomes Change, the temperature rise of the input voltage and input current of motor, motor parameter and be uploaded to host computer, tested frequency conversion is obtained by host computer The power supply disturbance tolerance evaluation of tested motor under device driving.
On the one hand the power supply disturbance generator can realize the normal power supply of tested frequency converter, on the other hand can produce Power supply disturbance.Power supply disturbance generator controls power electronic devices entirely using power stage, has four quadrant running ability, can realize Energy feedback, three-phase voltage amplitude, phase can be separately adjustable, possess that adjustable voltage, frequency-adjustable, harmonic wave be controllable, power network mould The function of plan, except various types of Voltage Drops caused by common power supply trouble, including three-phase symmetrical and asymmetry, two-phase, It is single-phase fall beyond, additionally it is possible to simulate the frequency fluctuation of local power power network, harmonic pollution, the quality of power supply of voltage pulsation show As.
The power supply disturbance generator parameter is as follows：
1. power：20kW；
2. input voltage：Three-phase 380V ± 15；
3. ac output voltage：0~690V three-phases are separately adjustable；
4. 2~50 subharmonic can be superimposed on the basis of fundamental wave；
5. programmable voltage amplitude, frequency, phase；
6. 0~360 ° of voltage-phase is adjustable, 1 ° of step-length is adjusted；
7. alternating voltage regulation step-length 0.1V；
8. output voltage frequency 0.1Hz~400Hz, regulation step-length 0.01Hz；
9. rate-adaptive pacemaker precision≤0.01Hz；
10. power supply voltage stabilizing rate≤0.5%；
11. setting total THD 0~20%, a variety of harmonic combinations, single harmonic component accounting is set respectively；
12. voltage distortion degree≤1% (linear load)；
13. negative phase-sequence degree of unbalancedness 0~100%, resolution are set：0.1%；
14. set duration 10ms~10min, resolution：1ms；
15. fluctuation flickering amplitude Pst=1~10 are set；
16. overload capacity：110%In:1min；120%In:30s；2In:2s.
Tested frequency converter：Electric energy and start and stop, rotating speed control are provided for tested motor.
Tested motor：One of test object for whole system, as motor.
Disturbance rejection device：Resist the device of grid disturbance, such as the voltage compensating device that reactance voltage falls, input side it is various Supporting filter, batteries, uninterruption power source UPS, as shown in Fig. 1 dotted line frames.
Dragged generator and tested motor coaxially connected, as the load of tested motor, in addition to base, rotating shaft Part.
It is described to be dragged generator parameter as follows：
1. rated power：22kW；
2. rated voltage：380V；
3. nominal torque：142.93N.m；
4. rated current：42.5A；
5. rated speed：1480r/min；
6. frequency range：Permanent torque 5~50Hz of mode, 50~100Hz of invariable power mode；
7. connection：Δ.
Grid-connected frequency converter is four quadrant convertor, connects and is dragged generator unit stator side, the exchange that generator will be dragged to send The industrial-frequency alternating current that electricity is changed into 50Hz through over commutation and inversion is incorporated to power supply grid, realizes energy feedback, improves a whole set of system The efficiency of system, while the closed-loop control of torque is realized, so as to control grid-connected power, realize load control.
Described to switch the switch connection for realizing electric loop, the switch is included between power supply and power supply disturbance generator Q1, the switch Q2 between power supply disturbance generator and tested frequency converter are switched, and between grid-connected frequency converter and power supply grid Grid-connected switch Q3, switch use miniature circuit breaker form, can resist the rush of current of divide-shut brake moment, prevent from damaging electric power electricity Sub- equipment.
The measure-controlling unit is used to realize measurement, processing and the display of analog quantity, switch control, turn of load system Square controls and the disturbance of power supply disturbance generator controls, and is divided into acquisition zone, viewing area, data calculating area and control operation Area.As shown in figure 3, the electric simulation amount of voltage x current is changed into and turned suitable for A/D through over-sampling circuit and signal conditioning circuit The analog input signal of parallel operation, data signal is converted to by high-precision A/D converter, data signal passes to digital processing Chip carries out the processing and calculating of data, is then uploaded to host computer by communication bus and is shown and stored；Positioned at rotating shaft On photoelectric encoder a series of grating pulse is exported by the rotation of rotating shaft, be transferred to after pulse processing circuit is handled Tested Frequency Converter Control chip, by counting to get the tach signal of motor, is entered by communication bus real-time Transmission to host computer Row display；Moment of torsion active force is changed into electric signal transmission to grid-connected Frequency Converter Control core by the torque sensor in rotating shaft Piece, grid-connected Frequency Converter Control chip are shown torque numerical value real-time Transmission is surveyed and deposited to host computer by communication bus Storage；The three-phase stator winding connection instrument for measuring DC resistance of tested motor, the threephase stator resistance value measured are total by communicating Line is transferred to host computer, for calculating the temperature rise of stator winding.Turned by each voltage x current of display real-time display of host computer Fast torque profile and numerical value and the opening and closing state respectively switched, while the secondary calculating amount of power can be shown.
Data calculate area and calculate each performance number according to the voltage x current of collection, are calculated according to tested motor stator resistance value The temperature rise of tested motor, while Fourier analysis is carried out to torque, according to each harmonic torque component of temperature rise, Fourier analysis And related given parameters calculate tolerance evaluation number according to formula (1).
Control operation area provides various instructions, as shown in figure 3, the rotating speed of host computer output, start and stop instruction are by communication Bus is transferred to tested Frequency Converter Control chip, is tested Frequency Converter Control chip output switch control signal, by being tested frequency conversion After pulse driving circuit amplification inside device, the inverter circuit that is transferred to inside tested frequency converter, so as to realize tested motor Rotating speed, start-up and shut-down control；The torque instruction of host computer output is transferred to grid-connected Frequency Converter Control chip by communication bus, grid-connected Pulse driving circuit of the Frequency Converter Control chip according to torque control algorithm output switching signal to inside, amplified output is extremely Internal inverter circuit is dragged the direct torque of generator so as to realize；It is total by communication that instruction occurs for the disturbance of host computer output Line is transferred to power supply disturbance generator control chip, also passes through the pulse amplifying circuit of inside and the inverter circuit of inside to quilt Frequency converter is surveyed, produces corresponding power supply disturbance；Meanwhile host computer can also the division of output switch instruct to the control of switch internal Loop processed, controlling switch contact, realize switch control.
Measure-controlling unit is provided with display and is built-in with host computer, there is electrical wiring schematic diagram on guidance panel, The state of switch has indicator lamp instruction, and test data can export the convenient progress of file of * .txt, * .csv, * .xls form Processing.Control software uses LABVIEW programmings.Meanwhile measure-controlling unit is equipped with power supply disturbance generator and grid-connected Overvoltage, the overcurrent protection of frequency converter, short-circuit protection, overheat protector, dc bus overvoltage protection.
Measure-controlling unit parameter：
1.A/D converter acquisition channels：16 tunnels；
2.A/D converter sampling frequencies：10kHz；
3.A/D converter resolutions：16；
4. torque sensor measurement accuracy：± 0.2%；
5. the maximum measurement torque of torque sensor：200N.m.
Device of the present invention is arranged on to facilitate transhipment in container, and the container is twenty equivalent unit, Degree of protection IP54, it is adapted to outdoor long-term storage whole system.In the container by place using function be divided into Office Area, Simultaneously there is visible marking in battery limits, the region of test section 3.Container is equipped with corresponding conditioner, is provided for engineering staff Ideal working environment.The container is equipped with corresponding illumination, fire-fighting, emergency lighting device.The container has outer Portion's power interface, meet the needs of its illumination and test electricity consumption.
As shown in figure 1, so that Voltage Drop is tested as an example, the present invention is with the squirrel-cage three-phase asynchronous electric of transducer drive Machine, residual voltage boost type DC generatrix voltage compensation device are test object, are tested.
One kind that residual voltage boost type DC generatrix voltage compensation device class belongs in the voltage compensating device in Fig. 1, it is in parallel Between frequency converter input power and frequency changer direct current bus, when voltage is normal, voltage compensating device does not work, and frequency converter exists Normal work under supply voltage, when disturbance generator sends Voltage Drop, voltage compensating device detection is tested the straight of frequency converter Busbar voltage is flowed, when DC bus-bar voltage drops to setting value, voltage compensating device branch road is started working, residual using power supply Pressure, the booster circuit of connecting inner is boosted, and so as to maintain DC bus-bar voltage constant, transports frequency converter driven motor OK.
Following describe the test result under three kinds of operating modes：
Operating mode 1：
Frequency:30Hz
Rotating speed:857r/min
Torque:47Nm
Transducer power:4.8kW
Drop depth：AB two-phases 60%
Drop-out time：5s
Operating mode 2：
Frequency:30Hz
Rotating speed:855r/min
Torque:47Nm
Transducer power:4.8kW
Drop depth：Three-phase 25%
Drop-out time：5s
Operating mode 3：
Frequency:30Hz
Rotating speed:855r/min
Torque:47Nm
Transducer power:4.8kW
Drop depth：AC two-phases 25%
Drop-out time：5s
Operating mode 4：
Frequency:30Hz
Rotating speed:855r/min
Torque:47Nm
Transducer power:4.8kW
Drop depth：C phases 25%
Drop-out time：5s
From the point of view of actual test result, supply voltage single-phase, two-phase, three-phase difference amplitude fall disturbance under, voltage Compensation device puts into operation, is tested frequency converter and tested the motor nothing under the DC bus-bar voltage support of voltage compensating device Interference, running well, output voltage remains stable, and the output torque of motor also keeps stable, and motor temperature rise belongs to normal range (NR), There is whole system stronger reactance voltage to fall tolerance.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any Those familiar with the art is in scope disclosed by the invention, and the change or replacement that can readily occur in should all be contained Lid is within the scope of the invention as claimed.

Claims (6)

1. the test of transducer drive electric system power supply disturbance tolerance, evaluation method, it is characterised in that comprise the following steps：
Step 1, method of testing：
The anti-instantaneous voltage disturbance test of step 11.：
111. measure-controlling unit provides instruction, closure switch Q1, switch Q2；
112. measure-controlling unit gives rotating speed of target, sent to tested frequency converter and start order, it is tested to be tested frequency converter dragging Motor and generator zero load soft start is dragged to rotating speed of target；
113. measure-controlling unit provides instruction, closure switch Q3, system grid connection；
114. torque reference is slowly increased on measure-controlling unit, system loads to target torque；
115. measure-controlling unit to power supply disturbance generator send disturbance instruction, including Voltage Drop amplitude and duration with And it is separate caused by falling, power supply disturbance generator produces the Voltage Drop of setting time and amplitude as requested, is three relative Claim, asymmetry is fallen, two-phase is fallen, it is single-phase fall, it is automatic to recover to normal power supply after falling end；
116. slowly reduce torque reference on measure-controlling unit to zero；
117. measure-controlling unit sends halt instruction to tested frequency converter, whole system is shut down；
118. measure-controlling unit disconnects each switch successively according to switch Q3, switch Q2, switch Q1 order；
119. during disturbance, determine tested frequency converter with the presence or absence of shutdown by manually observing；Measure-controlling unit gathers The output current of tested frequency converter, voltage waveform, calculate power output；By gathering dtc signal and being obtained by Fourier analysis To the average value and each harmonic component of torque；Negative sequence field in motor be present because different falling may result in, cause The motor feels hot, after test terminates, measures the resistance of tested motor stator winding using direct resistance metering instrument at once, measurement control is single Member calculates winding temperature according to winding resistance, obtains the temperature rise of motor stator winding, and in summary data draw the anti-of system Instantaneous voltage disturbance tolerance evaluation.
Step 12. long duration voltage wave testing：
121. measure-controlling unit provides instruction, closure switch Q1, switch Q2；
122. measure-controlling unit gives rotating speed of target, sent to tested frequency converter and start order, it is tested to be tested frequency converter dragging Motor and generator zero load soft start is dragged to rotating speed of target；
123. measure-controlling unit provides instruction, closure switch Q3, system grid connection；
124. torque reference is slowly increased on measure-controlling unit, system loads to target torque；
125. measure-controlling unit to power supply disturbance generator send disturbance instruction, including change frequency, variation, continue when Between；
126. slowly reduce torque reference on measure-controlling unit to zero；
127. measure-controlling unit sends halt instruction to tested frequency converter, whole system is shut down；
128. measure-controlling unit disconnects each switch successively according to switch Q3, switch Q2, switch Q1 order；
129. during test, frequency converter is tested during determining disturbance with the presence or absence of shutdown by manually observing；Measurement control is single The output current of member collection tested motor, voltage waveform, by the power output that frequency converter is calculated；Believed by gathering torque Number, to calculate the torque of tested motor relative to the fluctuating range under clean supply；Because prolonged voltage pulsation is same Sample can cause the abnormal heating of winding, after the same method the temperature rise of measurement motor winding, and in summary data draw system Anti- long duration voltage fluctuation tolerance evaluation；
Step 13. harmonic disturbance is tested：
131. measure-controlling unit provides instruction, closure switch Q1, switch Q2；
132. measure-controlling unit gives rotating speed of target, sent to tested frequency converter and start order, it is tested to be tested frequency converter dragging Motor and generator zero load soft start is dragged to rotating speed of target；
133. measure-controlling unit provides instruction, closure switch Q3, system grid connection；
134. torque reference is slowly increased on measure-controlling unit, system loads to target torque；
135. measure-controlling unit to power supply disturbance generator send disturbance instruction, including harmonic amplitude, overtone order, continue when Between；
136. slowly reduce torque reference on measure-controlling unit to zero；
137. measure-controlling unit sends halt instruction to tested frequency converter, whole system is shut down；
138. measure-controlling unit disconnects each switch successively according to switch Q3, switch Q2, switch Q1 order；
139. during test, determine tested frequency converter with the presence or absence of shutdown by manually observing；Measure-controlling unit gathers quilt The output current of measured motor, the waveform of voltage, and calculate the power output of tested frequency converter；Dtc signal progress to collection is humorous Wave analysis, analyze the torque DC component harmony wave component of tested motor；Likewise, harmonic voltage is too high to cause motor Temperature rise increase, after test terminates, the temperature rise of measurement motor is also answered, in summary data show that the anti-harmonic distortion disturbance of system is resistance to Evaluated by property；
Step 2, evaluation method：
Evaluation method of the present invention is for tolerance of the transducer drive electric system in the case where power supply disturbs and with system is Based on no shutdown, the torque of integrated system or the temperature rise of power swing amplitude and motor be index tolerance evaluation side Method, comprise the following steps that：
Step 21. is in the case where power supply disturbs, when there is shutting down phenomenon in transducer drive electric system, tolerance evaluation number Stol =0, that is, think that system disturbs no tolerance for power supply；
Step 22. power supply disturb under, when transducer drive electric system remains to continuous service, tolerance evaluation number according to Below equation carries out value：
<mrow> <msub> <mi>S</mi> <mrow> <mi>t</mi> <mi>o</mi> <mi>l</mi> </mrow> </msub> <mo>=</mo> <mn>100</mn> <mo>-</mo> <mn>100</mn> <mo>&amp;times;</mo> <mrow> <mo>(</mo> <msub> <mi>k</mi> <mi>f</mi> </msub> <mo>&amp;times;</mo> <mo>|</mo> <mfrac> <mrow> <msub> <mi>T</mi> <mn>1</mn> </msub> <mo>-</mo> <msub> <mi>T</mi> <mi>s</mi> </msub> </mrow> <msub> <mi>T</mi> <mi>s</mi> </msub> </mfrac> <mo>|</mo> <mo>+</mo> <msub> <mi>k</mi> <mi>h</mi> </msub> <mo>&amp;times;</mo> <mfrac> <mrow> <munderover> <mo>&amp;Sigma;</mo> <mn>2</mn> <mi>n</mi> </munderover> <msqrt> <mrow> <mo>(</mo> <msup> <msub> <mi>T</mi> <mn>2</mn> </msub> <mn>2</mn> </msup> <mo>+</mo> <msup> <msub> <mi>T</mi> <mn>3</mn> </msub> <mn>2</mn> </msup> <mo>+</mo> <mn>......</mn> <mo>+</mo> <msup> <msub> <mi>T</mi> <mi>i</mi> </msub> <mn>2</mn> </msup> <mo>)</mo> </mrow> </msqrt> </mrow> <msub> <mi>T</mi> <mi>s</mi> </msub> </mfrac> <mo>+</mo> <msub> <mi>k</mi> <mi>t</mi> </msub> <mo>&amp;times;</mo> <msup> <mi>e</mi> <mrow> <msub> <mi>k</mi> <mi>p</mi> </msub> <mo>&amp;times;</mo> <mfrac> <mrow> <mi>&amp;Delta;</mi> <mi>t</mi> <mo>-</mo> <msub> <mi>t</mi> <mrow> <mi>s</mi> <mi>e</mi> <mi>t</mi> </mrow> </msub> </mrow> <msub> <mi>t</mi> <mi>max</mi> </msub> </mfrac> </mrow> </msup> <mo>)</mo> </mrow> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> <mo>;</mo> </mrow>
StolIt is tolerance evaluation number；
kfIt is fundamental wave torque ripple weight coefficient；
T1Be measurement fundamental wave torque, DC component；
TsIt is torque (power) setting value；
khIt is harmonic torque (power) fluctuation weight coefficient；
TiIt is i subharmonic torque (power), of ac；
ktIt is temperature rise weight coefficient；
kpIt is temperature rise gain；
Δ t is the motor temperature rise of measurement；
tmaxIt is the temperature limit of motor；
tsetIt is the temperature rise controlling value of system motor under normal power supply；
E is math constant, i.e. the truth of a matter of natural logrithm function.
2. transducer drive electric system power supply disturbance tolerance test according to claim 1, evaluation method, its feature It is, in the step 125, power supply disturbance generator changes frequency and variation on demand at generation setting in dozens of minutes Voltage pulsation, it is automatic to recover to normal power supply after fluctuation terminates.
3. transducer drive electric system power supply disturbance tolerance test according to claim 1, evaluation method, its feature It is, in the step 135, power supply disturbance generator is on demand at superimposed voltage harmonic wave on normal voltage waveform, simulation electricity The wave distortion of net, it is automatic to recover to normal power supply after distortion terminates.
4. transducer drive electric system power supply disturbance tolerance test according to claim 1, evaluation method, its feature It is, in the step 22, for constant torque load, the output torque for motor of T representatives, for constant power load, T is represented Be motor power output.
5. the test of transducer drive electric system power supply disturbance tolerance, evaluating apparatus, it is characterised in that including：Power supply grid, Q1, switch Q2 are switched, Q3, power supply disturbance generator is switched, is tested frequency converter, tested motor, is dragged generator, filter dress Put, voltage compensating device, batteries, measure-controlling unit, base, rotating shaft, uninterruption power source UPS, grid-connected frequency converter； Tested frequency converter respectively with uninterruption power source, voltage compensating device, filter, batteries, measure-controlling unit, simultaneously Net frequency converter, tested motor, generator is dragged to connect；Power supply disturbance generator respectively with measure-controlling unit, voltage compensation Device, filter connection.
6. transducer drive electric system power supply disturbance tolerance test according to claim 5, evaluating apparatus, its feature It is, the measure-controlling unit includes：Host computer, sample circuit, signal conditioning circuit, A/D converter, digital processing core Piece, communication bus, rotating shaft, photoelectric encoder, pulse processing circuit, tested Frequency Converter Control chip, pulse driving circuit, inversion Circuit, torque sensor, grid-connected Frequency Converter Control chip, power supply disturbance generator control chip, instrument for measuring DC resistance；Sampling Circuit, signal conditioning circuit, A/D converter, digital processing chip are connected by communication bus with host computer；Rotating shaft, photoelectricity are compiled Code device, pulse processing circuit, tested Frequency Converter Control chip are connected by communication bus with host computer；Rotating shaft, torque sensor, Grid-connected Frequency Converter Control chip is connected by communication bus with host computer；Inverter circuit, pulse driving circuit, disturbance of powering Device control chip is connected by communication bus with host computer.
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