CN109470940A - A kind of current transformer full power trial (FPT) device and method - Google Patents
A kind of current transformer full power trial (FPT) device and method Download PDFInfo
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- CN109470940A CN109470940A CN201710801539.0A CN201710801539A CN109470940A CN 109470940 A CN109470940 A CN 109470940A CN 201710801539 A CN201710801539 A CN 201710801539A CN 109470940 A CN109470940 A CN 109470940A
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- G—PHYSICS
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- 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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Abstract
The invention discloses a kind of current transformer full power trial (FPT) devices, including hookup, the hookup includes sequentially connected subject current transformer, reactor and accompanies examination current transformer, it is described subject current transformer input terminal and accompany try current transformer output end connect with power grid；It is described to accompany examination current transformer to be used to export adjustable output frequency and output voltage to adjust the output frequency of subject current transformer and be tested with output voltage.The invention also discloses a kind of test methods based on current transformer full power trial (FPT) device as described above, accompany output frequency and the output voltage of examination current transformer to be tested with the output frequency for adjusting subject current transformer with output voltage by adjusting.Current transformer full power trial (FPT) device of the invention and test method all have the advantages that experimentation cost is low, stability is good, loss is small and full rate experimental tests.
Description
Technical field
The invention mainly relates to technical field of rail traffic, refer in particular to a kind of current transformer full power trial (FPT) device and method.
Background technique
Full power trial (FPT) is that the necessary corner of high-power converter production-type test and high-power converter product are set
Count the necessary ways that parameter examination verifying is promoted with product quality.Existing converter device full power trial (FPT) method mainly has reactance
Device formula reactive load method, resistance-type energy consumption carrying method, motor can present carrying method to dragging.Wherein reactor formula reactive load
Phase-shifting transformer can not be examined；The load of resistance-type energy consumption is mainly that load energy is consumed in a manner of thermal energy, not economical enough, and
Heat dissipation equipment cost and place etc. are required high；To present load test ability comprehensive to dragging for motor, is that middle low power grade is common
Test method need to be continuously increased the motor of more high-power grade and change can be presented but with the increase of transducer power grade
Frequency device, cost of investment is high, takes up a large area, long term growth of the uncomfortable application industry in high-power direction；Direct feedback input electricity
Network method efficiently solves the problems such as electrical network capacity is insufficient, test cost of investment is high, test loss is big, but there are current transformer direct currents
The fixed problem of voltage output scarce capacity, current transformer test output frequency.Now various power test methods are specifically introduced such as
Under:
(1) reactor formula reactive load method
Since party's subtraction unit mainly exports inactivity electric current, so current transformer output power element can only be examined, to having
Input element, input transformer etc. can not be examined, simultaneously because input is idle, in the case of can not carrying out fictitious load to device
Output power factor adjusts examination.
(2) resistance-type energy consumption carrying method
This method can carry out comprehensive assessment to subject current transformer, but power loss is very big, and all loads are all with thermal energy
Consumption, experimentation cost is high, and heat dissipation capacity is very big, and heat dissipation equipment and place etc. require high.
(3) motor is to dragging carrying method
Be tested in this method frequency converter load be motor to by way of dragging by frequency converter load can be presented, and by energy
Frequency converter is presented by load energy feedback power grid.This method test capability is comprehensive, but being continuously increased with transducer power grade,
It is continuously increased the motor of more high-power grade and frequency converter can be presented, cost of investment is high, takes up a large area.
(4) directly feedback inputs power grid method
Patent: CN200910011321.0 " a kind of current transformer full load unsteady flow test method of micro energy lose " proposes a kind of examination
Proved recipe method, this method current transformer export the input terminal power grid that frequency converter is directly accessed by reactor, control frequency converter output work
Blunt take back is fed to input terminal power grid, and prime power grid only provides test loss, as shown in figure 4, this scheme efficiently solves power grid
Off-capacity, test cost of investment are high, the problems such as big is lost in test.But there is problems in that
1, due to factors such as design feature of current transformer itself, costs, frequency converter DC voltage has been tended not to too much
Surplus causes to be not enough to export voltage more higher than input power grid in the case of frequency converter especially full power, even if its output electricity
Pressure energy reaches the size of input voltage reluctantly, but due to not more surpluses can not adequacy test when the anti-power grid of frequency converter rush
It hits, the stability of process can not be tested.
2, since mains frequency is fixed, the whole current transformer output frequency of all tests can only also be fixed as mains frequency, nothing
Method realizes the full load test of each Frequency point of frequency-converter device.
Summary of the invention
The technical problem to be solved in the present invention is that, for technical problem of the existing technology, the present invention provides one
Kind structure is simple, test process is stable, realizes the current transformer full power trial (FPT) device and method that the full load of full rate point is tested.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A kind of current transformer full power trial (FPT) device, including hookup, the hookup include sequentially connected subject
Current transformer, reactor and examination current transformer is accompanied, the input terminal of the subject current transformer and accompanying tries the output end of current transformer and power grid
Connection；It is described to accompany examination current transformer to be used to export adjustable output frequency and output voltage to adjust the output frequency of subject current transformer
Rate is tested with output voltage.
As a further improvement of the above technical scheme:
The subject current transformer is single-phase converter or polyphase inverter.
The invention also discloses a kind of test methods based on current transformer full power trial (FPT) device as described above, pass through tune
Section accompanies output frequency and the output voltage of examination current transformer to be tested with the output frequency for adjusting subject current transformer with output voltage.
As a further improvement of the above technical scheme:
The output fundamental frequency for accompanying examination current transformer is identical as power grid fundamental frequency.
The phase angle for accompanying examination output current of converter fundamental wave is identical as the phase angle of power grid.
The output power of subject current transformer, including active power and reactive power are adjusted, to carry out power and power factor
Test.
Compared with the prior art, the advantages of the present invention are as follows:
Current transformer full power trial (FPT) device of the invention and test method, the output voltage for being tested current transformer become through subject
Stream device is fed back to same power grid, and power grid only provides test loss Partial Power, not only can achieve minor scale power net and realize high-power change
The purpose of device full power trial (FPT) is flowed, and solves the problems, such as current transformer direct current output scarce capacity, the stabilization of guarantee test process
Property；Additionally by accompany examination current transformer export adjustable output frequency and output voltage with adjust subject current transformer output frequency
It is tested with output voltage, realizes the full load test of subject each Frequency point of current transformer, and structure is simple, at low cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of reactance reactive load experimental rig in the prior art.
Fig. 2 is the structural schematic diagram of resistance-type energy consumption load testing apparatus in the prior art.
Fig. 3 is motor in the prior art to the structural schematic diagram for dragging load testing apparatus.
Fig. 4 is the structural schematic diagram of direct feedback grid experimental rig in the prior art.
Fig. 5 is the structural schematic diagram of experimental rig of the invention.
Fig. 6 is the structural schematic diagram of experimental rig of the invention in specific application.
Fig. 7 is that transducer power adjustment block-diagram is tested in the present invention.
Fig. 8 is that examination frequency converter output voltage and frequency adjustment block-diagram are accompanied in the present invention.
Figure label indicates: 1, power grid；2, it is tested current transformer；3, reactor；4, examination current transformer is accompanied.
Specific embodiment
Below in conjunction with Figure of description and specific embodiment, the invention will be further described.
As shown in Fig. 5 to Fig. 8, the current transformer full power trial (FPT) device of the present embodiment, including hookup, hookup packet
It includes sequentially connected subject current transformer 2, reactor 3 and accompanies examination current transformer 4 (wherein the components such as switch do not embody in figure), subject
The input terminal of current transformer 2 and accompany examination current transformer 4 output end connect with power grid 1；Accompany examination current transformer 4 adjustable for exporting
Output frequency and output voltage are tested with the output frequency for adjusting subject current transformer 2 with output voltage.Unsteady flow of the invention
Device full power trial (FPT) device, the output voltage for being tested current transformer 2 are fed back to same power grid 1 through being tested current transformer 2, and power grid 1 only mentions
Partial Power is lost for test, not only can achieve the purpose that minor scale power net 1 realizes high-power converter full power trial (FPT), but also solve
Certainly the problem of current transformer direct current output scarce capacity, the stability of guarantee test process；It can additionally by accompanying examination current transformer 4 to export
The output frequency and output voltage of adjusting are tested with the output frequency for adjusting subject current transformer 2 with output voltage, realize quilt
The full load test of each Frequency point of current transformer 2 is tried, and structure is simple, at low cost.
In the present embodiment, subject current transformer 2 can be high-voltage frequency converter, can also be with other high and low pressure current transformers, voltage
Grade, main circuit topology, component model, power grade, input and the output number of phases (can be single-phase converter, be also possible to
Three-phase or polyphase inverter) it is unrestricted.
The present invention further correspondingly discloses a kind of test method based on current transformer full power trial (FPT) device as described above, passes through
The output frequency for accompanying examination current transformer 4 and output voltage are adjusted to adjust the output frequency of subject current transformer 2 and output voltage progress
Test.The corresponding output frequency of subject current transformer 2 examination point and output voltage can carry out any adjustment, true more to simulate completely
The loading condition of change.
In the present embodiment, accompany the output fundamental frequency of examination current transformer 4 identical as 1 fundamental frequency of power grid；Accompany examination current transformer 4 defeated
The phase angle of current first harmonics is identical as the phase angle of power grid 1 out.
In the present embodiment, the output power of subject current transformer 2, including active power and reactive power are adjusted, to carry out function
The test of rate and power factor.
Test method of the invention is described further below with reference to a specific embodiment:
Wherein subject current transformer 2 is 10kV cell level connection type high-voltage frequency converter, and accompanying examination current transformer 4 is that 10kV accompanies the high pressure energy of examination
Feedback type frequency converter, steps are as follows for specific test method:
(1) on-test, by subject frequency converter, above high pressure is standby with examination frequency converter is accompanied；
(2) it starts and accompanies examination frequency converter output certain frequency f1 and certain voltage U1；Frequency f1 can be subject frequency converter
Rated frequency be also possible to other examination dot frequencies；The voltage rating that voltage U1 can be subject frequency converter is also possible to other
Examination point voltage；
(3) subject frequency converter is started, the output power of subject frequency converter, including active power and reactive power are adjusted, with
Meet subject transducer power, power factor check requirements (i.e. subject frequency converter output, input power size and power because
Number is adjusted by subject frequency converter itself to realize), specific active power, reactive power adjustment control method are routine side
Method, specific block diagram is as shown in fig. 7, wherein Va、Vb、VcTo be tested output side transducer phase voltage, ia、ib、icTo be tested frequency conversion
Device outlet side phase current；P, Q is subject frequency converter active power of output, reactive power；θ is subject output side transducer voltage phase
Parallactic angle, P*、Q*For the given instruction for being tested frequency converter active power of output, reactive power；
(4) the adjustable output frequency and output voltage for accompanying examination frequency converter during testing reaches adjustment subject frequency conversion
The output frequency of device and the purpose of output voltage (are tested the output frequency of frequency converter and the size of output voltage are to pass through adjusting
Output frequency and the output voltage size of examination frequency converter is accompanied to realize)；Specific voltage, frequency adjustment control method are routine side
Method, specific structural block diagram is as shown in figure 8, wherein f*、U*For the given instruction for being tested frequency converter output frequency, voltage；
(5) stablize centainly examination point (power, power factor, voltage, electric current, frequency more than one or multiple stabilizations, specifically with
Subject to test objective) long-time examination is carried out, and correlation test data are recorded, complete correlation test.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention should be regarded as protection of the invention
Range.
Claims (6)
1. a kind of current transformer full power trial (FPT) device, which is characterized in that including hookup, the hookup includes successively connecting
The subject current transformer (2) that connects, reactor (3) and examination current transformer (4) is accompanied, the input terminal of subject current transformer (2) and examination is accompanied to become
The output end of stream device (4) is connect with power grid (1)；It is described to accompany examination current transformer (4) for exporting adjustable output frequency and defeated
Voltage is tested with the output frequency for adjusting subject current transformer (2) with output voltage out.
2. current transformer full power trial (FPT) device according to claim 1, which is characterized in that the subject current transformer (2) is
Single-phase converter or polyphase inverter.
3. a kind of test method based on current transformer full power trial (FPT) device of any of claims 1 or 2, which is characterized in that logical
The output frequency for accompanying examination current transformer (4) and output voltage are overregulated to adjust the output frequency of subject current transformer (2) and output electricity
Pressure is tested.
4. test method according to claim 3, which is characterized in that the output fundamental frequency for accompanying examination current transformer (4)
It is identical as power grid (1) fundamental frequency.
5. test method according to claim 3, which is characterized in that described that examination current transformer (4) is accompanied to export current first harmonics
Phase angle is identical as the phase angle of power grid (1).
6. test method according to claim 3, which is characterized in that the output power of subject current transformer (2) is adjusted, including
Active power and reactive power, to carry out the test of power and power factor.
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| CN201710801539.0A CN109470940B (en) | 2017-09-07 | 2017-09-07 | Full-power test device and method for converter |
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| CN201710801539.0A CN109470940B (en) | 2017-09-07 | 2017-09-07 | Full-power test device and method for converter |
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| CN109470940B CN109470940B (en) | 2021-03-23 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110286316A (en) * | 2019-07-02 | 2019-09-27 | 中车大连机车研究所有限公司 | It is a kind of based on pure inductance to the power module total power test method and system dragged |
| CN110286273A (en) * | 2019-05-16 | 2019-09-27 | 中国科学院合肥物质科学研究院 | The test circuit and method that voltage responsive is tested under thyristor current transformer rated current |
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| CN110286273A (en) * | 2019-05-16 | 2019-09-27 | 中国科学院合肥物质科学研究院 | The test circuit and method that voltage responsive is tested under thyristor current transformer rated current |
| CN110286273B (en) * | 2019-05-16 | 2021-07-30 | 中国科学院合肥物质科学研究院 | Test circuit and method for voltage response test under rated current of thyristor converter |
| CN110286316A (en) * | 2019-07-02 | 2019-09-27 | 中车大连机车研究所有限公司 | It is a kind of based on pure inductance to the power module total power test method and system dragged |
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