CN106597283A - High-power variable frequency electric transmission equipment test system - Google Patents
High-power variable frequency electric transmission equipment test system Download PDFInfo
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- CN106597283A CN106597283A CN201611256465.9A CN201611256465A CN106597283A CN 106597283 A CN106597283 A CN 106597283A CN 201611256465 A CN201611256465 A CN 201611256465A CN 106597283 A CN106597283 A CN 106597283A
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- 238000012360 testing method Methods 0.000 title claims abstract description 69
- 230000005540 biological transmission Effects 0.000 title claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims description 20
- 230000001360 synchronised effect Effects 0.000 claims description 17
- 238000004804 winding Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 description 7
- 238000005065 mining Methods 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 235000021167 banquet Nutrition 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
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- 238000005265 energy consumption Methods 0.000 description 1
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- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
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- 230000002463 transducing effect Effects 0.000 description 1
Classifications
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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
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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
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- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
Abstract
The invention provides a high-power variable-frequency electric transmission equipment testing system which comprises a testing loading feedback unit, a tested motor in transmission connection with the testing loading feedback unit, a tested frequency converter connected with the tested motor and a testing driving feedback unit connected with the output end of the tested frequency converter, wherein the power end of the testing loading feedback unit is connected with a direct current bus, and the power end of the testing driving feedback unit is connected with the direct current bus.
Description
Technical field
The present invention relates to a kind of test system, more particularly to a kind of high-power frequency conversion electric transmission device test system.
Background technology
In various mines, extensively application has high-pressure frequency-conversion drive apparatus, but, frequency converter need before being taken into use into
Mechanical load, the test of electric property of the various characteristics of row, such as frequency converter, motor or variable-frequency motor etc., due to testing item
Mesh is more and complicated, needs test system to have good adaptability and inter change ability, to meet different type, different size
The test requirements document of equipment under test.
However, in existing test equipment, being widely present and having a disadvantage that：Test system is complicated, bulky, high cost
It is high, frequently dismounting is needed, so as to cause testing efficiency low, powerful shortcoming of working, it is even more important that its adaptability and variable
Transducing power is weak, it is difficult to meet increasingly higher mining requirement.
It is, therefore, desirable to provide a kind of new test system, can effectively improve the adaptability and inter change ability of system, energy
Enough meet modern mining requirement, and whole system can be accurately tested high-pressure frequency-conversion drive apparatus, and effectively simplify
Test structure, without the need for frequently dismounting, improves testing efficiency, reduces labour intensity and cost.
The content of the invention
In view of this, it is an object of the invention to provide a kind of high-power frequency conversion electric transmission device test system, can be effective
The adaptability and inter change ability of raising system, disclosure satisfy that modern mining requirement, and whole system can be to high-pressure frequency-conversion
Drive apparatus are accurately tested, and effectively simplify test structure, without the need for frequently dismounting, improve testing efficiency, reduce work strong
Degree and cost.
The present invention provide a kind of high-power frequency conversion electric transmission device test system, including test loading feedback unit and
The tested frequency converter of the test tested motor that is connected of loading feedback unit and tested motor connection and described tested
The Test driver feedback unit of the output end connection of frequency converter, the power input end of the test loading feedback unit is female with direct current
Line connects, and the output end of the Test driver feedback unit is connected with dc bus.
Further, the test loading feedback unit include four four-quadrant inverters composition inversion unit, two plus
Carry motor, gear and torque rotary speed sensor；
The input of the inverter is connected with dc bus, and the output end of the inverter is connected with filter unit, institute
The output end for stating filter unit is connected by controlling switch with loading motor；
Wherein, the driving current of the output of the first inverter and the second inverter loads on the first loading motor, and the 3rd is inverse
Become device and the 4th inverter loads on the second loading motor, the motor shaft of second loading motor and the electricity of the first loading motor
Arbor is connected, and motor and the gear of the first loading motor are connected, the clutch end of the gear with
The electric machine shaft driving connection of tested motor, the torque rotary speed sensor is arranged at the clutch end of gear.
Further, the Test driver feedback unit includes that the first on-off switch, the second on-off switch, threeway disconnect
Pass, the 4th on-off switch, inverter circuit, driving filter circuit, motor and synchronous generator；
Path between the first on-off switch tested motor and tested frequency converter, the control of the synchronous generator is defeated
Enter end to be connected with the output end of tested frequency converter, the motor shaft of the synchronous generator connects with the electric machine shaft driving of motor
Connect；The output end of motor is connected by the 3rd on-off switch with the input for driving filter circuit, the feedback input electricity
The output end on road is connected with the input of inverter circuit, and the output end of inverter circuit is connected to dc bus, the second on-off switch
One end be connected to points of common connection between the output end of tested frequency converter and synchronous generator, the other end is connected to first and leads to
Disconnect and closing and the points of common connection between tested motor and tested frequency converter, one end of the 4th on-off switch is connected to tested
Points of common connection between motor and tested frequency converter, the other end is connected to the 3rd on-off switch and drives between filter circuit
Points of common connection.
Further, the detector unit for detecting electric current is also included, the detector unit is at least 7, is respectively arranged at
Circuit between controlling switch and loading motor, by the input of frequency converter, the output end of tested frequency converter and motor
Output end.
Further, loading test system and carrying out the gear ratio of loading motor number of poles and gear in the following manner is carried out
Match somebody with somebody：
S1. the gear ratio between loading motor and tested motor is calculated：
And the gear ratio has following constraints：ni＞ nj；Wherein, niFor the synchronization of loading motor
Rotating speed, njFor the synchronous rotational speed of tested motor；
S2. the weighted graph of gear ratio is drawn：Will loading motor a number of pole-pairs as a point, and by each point two-by-two
Connection, and obtain minimum of a value in the line between any two points；
S3. each number of pole-pairs loading motor Jing gears are calculated using Floyd algorithms and drives a number of pole-pairs tested motor
Minimum gear ratio.
Further, the loading test system carries out accompanying examination power of motor matching in the following manner：
Calculated by equation below and accompany examination motor rated power：
Wherein, A is motor radiating coefficient, τmaxFor the maximum temperature rise of motor, ηNBe by
The delivery efficiency of measured motor；K is the proportionality coefficient of electric energy and heat energy.
Further, have on the stator core of the loading motor 2 identical three-phase symmetric windings and two it is three relative
Winding is claimed to share rotor.
Beneficial effects of the present invention：By means of the invention it is possible to the adaptability and inter change ability of system is effectively improved, can
Meet modern mining requirement, and whole system can be accurately tested high-pressure frequency-conversion drive apparatus, disclosure satisfy that difference
The requirement of experiment of specification, different types of equipment under test, and effectively simplify test structure, the volume of whole system is reduced, without the need for
Frequently dismounting, improves testing efficiency, reduces labour intensity and cost, and control accuracy is high, and dynamic response is fast.
Description of the drawings
With reference to the accompanying drawings and examples the invention will be further described：
Fig. 1 is the schematic diagram of the present invention.
Fig. 2 is a kind of weighted graph of embodiment of the present invention.
Constant power loading rotating speed coverage after coordinating with gear ratio when Fig. 3 is loading motor p=2 f=50～75Hz
Figure.
Wherein, 1 is shaft coupling, and 2 is inverter, and 3 is filter unit, and 4 is gear, and 5 is torque rotary speed sensor, 6
For frequency converter, 7 to drive filter circuit, and 8 is inverter circuit, and 9 is detector unit.
Specific embodiment
Fig. 1 is the schematic diagram of the present invention, as illustrated, a kind of high-power frequency conversion electric transmission equipment test that the present invention is provided
System, including test loads feedback unit and the test loads tested motor and the tested motor that feedback unit is connected
The tested frequency converter of connection and the Test driver feedback unit of the output end connection of the tested frequency converter, the test loading
The power end of feedback unit is connected with dc bus, and the power end of the Test driver feedback unit is connected with dc bus, leads to
Said structure is crossed, the adaptability and inter change ability of system can be effectively improved, disclosure satisfy that modern mining requirement, and entirely
System can be accurately tested high-pressure frequency-conversion drive apparatus, and effectively simplifies test structure, without the need for frequently dismounting, improved and surveyed
Examination efficiency, reduces labour intensity and cost；Wherein, tested motor is but also as examination motor is accompanied, for trying frequency converter
Test, again examination frequency converter is accompanied in conduct to frequency converter, for the control tested tested motor M4.
In the present embodiment, the test loading feedback unit include the four-quadrant inversion unit of four inverters composition, two
Individual loading motor, gear and torque rotary speed sensor；
The input of the inverter is connected with dc bus, and the output end of the inverter is connected with filter unit, institute
The output end for stating filter unit is connected by controlling switch with loading motor；
Wherein, the driving current of the output of the first inverter and the second inverter loads on the first loading motor, and the 3rd is inverse
Become device and the 4th inverter loads on the second loading motor, the motor shaft of second loading motor and the electricity of the first loading motor
Arbor is connected, and motor and the gear of the first loading motor are connected, the clutch end of the gear with
The electric machine shaft driving connection of tested motor, the torque rotary speed sensor is arranged at the clutch end of gear, wherein,
First loading motor and the second loading motor adopt following structure：There are 2 identical three-phase symmetric windings on stator core
And two three-phase symmetric windings share rotor, so as to form the structure of double three-phase windings asynchronous motor supplied with variable frequencies, to widen trial assembly is accompanied
The loading range put, therefore, two loading motors equivalent to four low power loading motors, so as to effectively reduce the straight of rotor
Footpath, reduces rotary inertia, and accelerator response is fast, and energy consumption is little, improves the dynamic response of system and the utilization rate of equipment, and
And, radiating is more preferable；Harmonic leakage reactance reduces, and no-load current is reduced, air gap magnetic density waveform closer to sine wave, rotor harmonic loss and
Stator copper loss reduction, torque pulsation amplitude reduces, and efficiency is improved, even if one of stator winding or all the way power supply occur event
During barrier, loading motor can be made to carry out load shedding starting and operation, the reliability of system can be effectively improved.
Being connected in the present embodiment, is connected using shaft coupling, and the first loading motor and second is loaded
Motor realizes string axle construction, can effectively widen the loading range of system；Certainly, the number of filter unit and controlling switch with
The number of inverter is equal.
In the present embodiment, the Test driver feedback unit includes the first on-off switch, the second on-off switch, the 3rd break-make
Switch, the 4th on-off switch, inverter circuit, driving filter circuit, motor and synchronous generator；
Path between the first on-off switch tested motor and tested frequency converter, the control of the synchronous generator is defeated
Enter end to be connected with the output end of tested frequency converter, the motor shaft of the synchronous generator connects with the electric machine shaft driving of motor
Connect；The output end of motor is connected by the 3rd on-off switch with the input for driving filter circuit, the feedback input electricity
The output end on road is connected with the input of inverter circuit, and the output end of inverter circuit is connected to dc bus, the second on-off switch
One end be connected to points of common connection between the output end of tested frequency converter and synchronous generator, the other end is connected to first and leads to
Disconnect and closing and the points of common connection between tested motor and tested frequency converter, one end of the 4th on-off switch is connected to tested
Points of common connection between motor and tested frequency converter, the other end is connected to the 3rd on-off switch and drives between filter circuit
Points of common connection；
Wherein, when controlling switch SW1, controlling switch SW2, the 3rd on-off switch K3 and the first on-off switch K1 are closed, the
Two on-off switch K2 and the 4th on-off switch K4 disconnect, and now, the electric energy that dc bus is provided is converted to exchange by inverter circuit
Electricity and by driving filter circuit and filtering after, there is provided give motor M3, make motor work, be with engine alternator G1
Tested motor provides experiment power supply, and frequency converter is controlled to tested motor, and tested motor M4 is operated in motoring condition, runs on
Ith quadrant.Gear is used to change gear ratio, and string axle drags the first loading motor M1 and the second loading motor M2 so as to locate
In generating state, the IIth quadrant is run on, its electromagnetic torque direction is all the time with tested motor M4 conversely, four Driven by inverter
One loading motor M1 and the second loading motor M2 run under Direct Torque pattern, the first loading motor M1 and the second loading motor
To dc bus, the first loading motor and the second loading motor are loaded the secondary electric energy feedback that M2 is produced as load,
Under this situation, if frequency converter is by measurand, then tested motor M4 regards a part for test cell, as frequency converter
Accompany examination；If tested motor M4 is tested the power producing characteristics of tested motor, then frequency conversion as measurand
Device is with being invited to be present at a banquet given in honour of a distinguished guest examination.
When the experiment of the 4th quadrant is carried out, the first loading motor M1 and the 2nd loading motor are in motoring condition, tested motor
M4 is in generating state, the synchronous generator of the secondary electrical energy drive motoring condition that tested frequency converter produces tested motor M4
G1, motor M3 are in generating state, and by the electric energy feedback electric energy for producing to dc bus, and now, frequency converter is with being invited to be present at a banquet given in honour of a distinguished guest
Examination.
In the present embodiment, also include the detector unit for detecting electric current, the detector unit is at least 7, sets respectively
The circuit that is placed between controlling switch and loading motor, by the input of frequency converter, the output end of tested frequency converter and driving
The output end of motor, wherein, detector unit adopts current sensor, for the current status in detection test, it is of course also possible to
Using more current sensors, for detecting to more points, it is also possible to reduce corresponding test point.
In the present embodiment, loading test system carries out in the following manner loading motor number of poles and enters with the gear ratio of gear
Row matching：
S1. the gear ratio between loading motor and tested motor is calculated：
And the gear ratio has following constraints：ni＞ nj；Wherein, niFor the synchronization of loading motor
Rotating speed, njFor the synchronous rotational speed of tested motor；
S2. the weighted graph of gear ratio is drawn：Will loading motor a number of pole-pairs as a point, and by each point two-by-two
Connection, and obtain minimum of a value in the line between any two points；
S3. each number of pole-pairs loading motor Jing gears are calculated using Floyd algorithms and drives a number of pole-pairs tested motor
Minimum gear ratio；
By taking following loading motor as an example：Maximum rated power is 5000kW, number of pole-pairs 1-6, frequency 5-100Hz：
Its weighted graph as shown in Fig. 26 point p1 ..., p6, (i=1 ... 6) represents i-th pole of loading motor to wherein pi
Logarithm.Again from point pi, (i=1 ..., 5) draws to point pi-1 ..., and the straight line of p6, straight line (pi, pj) represents that i-th number of pole-pairs adds
Carry motor Jing gears and drive j-th number of pole-pairs (j=2 ... 6) tested motor, power is assigned on straight line for i-th number of pole-pairs loading
Motor drives tested motor gear ratio through gear.Weights are to drive big pole by little number of pole-pairs loading motor Jing gears
Logarithm tested motor, i.e. constraints；Using 6 point p1 ..., p6 as source point, list gear ratio matrix [jij]：
After Floyd algorithms, its result is：
| p1 | p2 | p3 | p4 | p5 | p6 | |
| p1 | 0 | 2 | 3 | 4 | 4.5 | 5 |
| p2 | 2 | 0 | 1.5 | 2 | 2.5 | 3 |
| p3 | 3 | 1.5 | 0 | 1.33 | 1.67 | 2 |
| p4 | 4 | 2 | 1.33 | 0 | 1.25 | 1.5 |
| p5 | 4.5 | 2.5 | 1.67 | 1.25 | 0 | 1.2 |
| p6 | 5 | 3 | 2 | 1.5 | 1.2 | 0 |
Loading motor frequency conversion output-constant operation frequency f is set as 50～75Hz, drives gear to slow down or speedup operation,
The range of speeds that can be covered is 500～6750r/min；Gear ratio is 1 expression loading motor constant speed direct drive, and gear ratio is
2.5 range of speeds is completely overlapped with the range of speeds that gear ratio is 2 and 3, can cancel gear ratio 2.5.In whole slewing range
Interior, rotating speed only overlaps 8%, and speed is higher than utilization rate；
In the present embodiment, the loading test system carries out accompanying examination power of motor matching in the following manner：
Calculated by equation below and accompany examination motor rated power：
Wherein, A is motor radiating coefficient, τmaxFor the maximum temperature rise of motor, ηNBe by
The delivery efficiency of measured motor；K is the proportionality coefficient of electric energy and heat energy, by said method, it is considered to which the motor feels hot, adopts and forces cold
But, heat-sinking capability is increased, lifting motor capacity expansion motor temperature rise nargin, maximum temperaturerise limit value is not to be exceeded insulating materials highest
Temperature rise is allowed, during design motor the class of insulation should be improved；The loss of electric machine is reduced, increases rated output power；Meanwhile, process of the test
Impact of the voltage change to overload capacity is taken into account, so as to meet the requirement of mechanical property when motor overload runs, also, according to upper
What formula was designed accompanies double three-phase windings asynchronous motor supplied with variable frequencies, using the half-power and total power of double three-phase machine；And play its overload
Ability, accompanies examination motor to cover four power shelves per platform, and to reach the quantity for accompanying examination motor is reduced.
Finally illustrate, above example is only unrestricted to illustrate technical scheme, although with reference to compared with
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent, and without deviating from the objective and scope of technical solution of the present invention, it all should cover at this
In the middle of the right of invention.
Claims (7)
1. a kind of high-power frequency conversion electric transmission device test system, it is characterised in that：Including test loading feedback unit and described
Tested motor and tested frequency converter and the tested frequency conversion of tested motor connection that test loading feedback unit is connected
The Test driver feedback unit of the output end connection of device, the power end of the test loading feedback unit is connected with dc bus,
The power end of the Test driver feedback unit is connected with dc bus.
2. high-power frequency conversion electric transmission device test system according to claim 1, it is characterised in that：The test is loaded back into
Feedback unit includes that the inversion unit of four four-quadrant inverter compositions, two loading motors, gear and torque rotary speeds are passed
Sensor；
The input of the inverter is connected with dc bus, and the output end of the inverter is connected with filter unit, the filter
The output end of ripple unit is connected by controlling switch with loading motor；
Wherein, the driving current of the output of the first inverter and the second inverter loads on the first loading motor, the 3rd inverter
The second loading motor, the motor shaft of second loading motor and the motor shaft of the first loading motor are loaded on the 4th inverter
One end be connected, the motor shaft other end of the first loading motor is connected by gear with tested motor, described
Torque rotary speed sensor is arranged at the clutch end of gear.
3. high-power frequency conversion electric transmission device test system according to claim 2, it is characterised in that：The Test driver is returned
Feedback unit includes the first on-off switch, the second on-off switch, the 3rd on-off switch, the 4th on-off switch, inverter circuit, driving filter
Wave circuit, motor and synchronous generator；
Path between the first on-off switch tested motor and tested frequency converter, the control signal of the synchronous generator
It is connected with the output end of tested frequency converter, the motor shaft of the synchronous generator is connected with the electric machine shaft driving of motor；Drive
The output end of dynamic motor by the 3rd on-off switch with driving filter circuit input be connected, the feedback input circuit it is defeated
Go out end to be connected with the input of inverter circuit, the output end of inverter circuit is connected to dc bus, one end of the second on-off switch
The points of common connection being connected between the output end of tested frequency converter and synchronous generator, the other end is connected to the first on-off switch
With the points of common connection between tested motor and tested frequency converter, one end of the 4th on-off switch be connected to tested motor with
Points of common connection between tested frequency converter, the other end is connected to the 3rd on-off switch and drives the public company between filter circuit
Contact.
4. high-power frequency conversion electric transmission device test system according to claim 3, it is characterised in that：Also include for detecting
The detector unit of electric current, the detector unit is at least 7, be respectively arranged at circuit between controlling switch and loading motor,
The output end of the input of tested frequency converter, the output end of tested frequency converter and motor.
5. high-power frequency conversion electric transmission device test system according to claim 4, it is characterised in that：Loading test system with
Following method carries out loading motor number of poles and is matched with the gear ratio of gear：
S1. the gear ratio between loading motor and tested motor is calculated：
And the gear ratio has following constraints：ni＞ nj；Wherein, niFor the synchronous rotational speed of loading motor,
njFor the synchronous rotational speed of tested motor；
S2. the weighted graph of gear ratio is drawn：Will loading motor a number of pole-pairs as a point, and each point is connected two-by-two
Connect, and obtain minimum of a value in the line between any two points；
S3. each number of pole-pairs loading motor Jing gears are calculated using Floyd algorithms and drives a number of pole-pairs tested motor most
Little gear ratio.
6. high-power frequency conversion electric transmission device test system according to claim 4, it is characterised in that：The loading test system
System carries out accompanying examination power of motor matching in the following manner：
Calculated by equation below and accompany examination motor rated power：
Wherein, A is motor radiating coefficient, τmaxFor the maximum temperature rise of motor, ηNFor tested electricity
The delivery efficiency of machine；K is the proportionality coefficient of electric energy and heat energy.
7. high-power frequency conversion electric transmission device test system according to claim 2, it is characterised in that：The loading motor
There are 2 identical three-phase symmetric windings on stator core and two three-phase symmetric windings share rotor..
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611256465.9A CN106597283A (en) | 2016-12-30 | 2016-12-30 | High-power variable frequency electric transmission equipment test system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611256465.9A CN106597283A (en) | 2016-12-30 | 2016-12-30 | High-power variable frequency electric transmission equipment test system |
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| CN106597283A true CN106597283A (en) | 2017-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611256465.9A Pending CN106597283A (en) | 2016-12-30 | 2016-12-30 | High-power variable frequency electric transmission equipment test system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110187276A (en) * | 2019-06-12 | 2019-08-30 | 广东电网有限责任公司 | The analysis method that harmonic wave influences the operating status of three-phase induction motor |
| CN112649729A (en) * | 2020-11-26 | 2021-04-13 | 天地（常州）自动化股份有限公司 | Test system and test method for comprehensively evaluating control performance of frequency converter |
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Cited By (2)
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| CN110187276A (en) * | 2019-06-12 | 2019-08-30 | 广东电网有限责任公司 | The analysis method that harmonic wave influences the operating status of three-phase induction motor |
| CN112649729A (en) * | 2020-11-26 | 2021-04-13 | 天地（常州）自动化股份有限公司 | Test system and test method for comprehensively evaluating control performance of frequency converter |
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