CN205120872U - Test platform suitable for an even number converter - Google Patents
Test platform suitable for an even number converter Download PDFInfo
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- CN205120872U CN205120872U CN201520908504.3U CN201520908504U CN205120872U CN 205120872 U CN205120872 U CN 205120872U CN 201520908504 U CN201520908504 U CN 201520908504U CN 205120872 U CN205120872 U CN 205120872U
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Abstract
The utility model provides a test platform suitable for an even number converter, including the electric wire netting inlet wire, the fuse, circuit breaker and a converter test group, the electric wire netting inlet wire is supplied power for the converter test group through the fuse and the circuit breaker that concatenate in proper order, the converter test group is including parallelly connected first and second test circuit that set up, first and second test circuit are all including the isolation transformer who connects in proper order, the filter circuit and the converter that awaits measuring, a test circuit's isolation transformer all is connected the circuit breaker with the 2nd test circuit's the converter that awaits measuring, a test circuit's the converter that awaits measuring passes through the isolation transformer that isolator connects the 2nd test circuit. The utility model discloses can be to many converter aging testing, it is efficient, improve life, a converter is perceptual power load in every converter test group, and one is capacitive power load, and the energy is intercoursed between two kinds of loads, reduces the energy exchange between load and power, reduces the loss, energy -conservation.
Description
Technical field
The utility model belongs to frequency converter degradation testing technique field, particularly relates to a kind of test platform being applicable to even number frequency converter.
Background technology
In the prior art, to frequency converter power on debugging time, the pusher side of frequency converter is connected with generator, by control make the frequency of frequency converter output voltage, amplitude and phase place all equal with line voltage time, namely reach grid-connected conditions, can be grid-connected smoothly.This mode is feasible for general performance test; but when needs carry out certification or some limit tests to frequency converter; in order to verify the sensitivity of frequency converter at transcient short circuit time locking pulse and the performance of switch protection device; need to implement short-circuit test to frequency converter; if enforcement short circuit; although the object of test frequency converter's performance can be reached, have the possibility damaging motor insulating layer because short-circuit current is excessive, damage can be caused to motor like this.
Meanwhile, current existing equipment generally only can be debugged single device, and efficiency is not high, and strong to generator dependence, loses time and human cost.
How to design one and do not rely on motor, can raise the efficiency simultaneously, problem that energy-conservation frequency converter burn-in test platform becomes those skilled in the art's research.
Utility model content
The problem that the technical program will solve is to provide one and does not rely on motor, can raise the efficiency, energy-conservation frequency converter burn-in test platform simultaneously.
For solving the problem, the technical solution adopted in the utility model:
Be applicable to the test platform of even number frequency converter, comprise electrical network inlet wire, fuse, isolating switch and a frequency converter test group, described electrical network inlet wire successively through serial connection fuse and isolating switch be that frequency converter test group is powered, described frequency converter test group comprises the first test circuit and the second test circuit that are arranged in parallel, described first test circuit and described second test circuit include the isolating transformer be linked in sequence successively, filtering circuit and frequency converter to be measured, the isolating transformer of described first test circuit is all connected described isolating switch with the frequency converter to be measured of described second test circuit, the frequency converter to be measured of described first test circuit connects the isolating transformer of the second test circuit by disconnector.
Also comprise n frequency converter test group, wherein, n >=1, in described n frequency converter test group, the first test circuit in a rear frequency converter test group and the first test circuit in last frequency converter test group are connected in series, the second test circuit in a rear frequency converter test group and the second test circuit in last frequency converter test group are connected in series, a disconnector is provided with between first test circuit junction of every two adjacent frequency converter test groups and the second test circuit junction, the frequency converter to be measured of the first test circuit of last frequency converter test group connects the isolating transformer of the second test circuit by disconnector, isolating transformer in each frequency converter test group in the first test circuit, filtering circuit is consistent with the frequency converter order of connection to be measured and direction, isolating transformer in each frequency converter test group in the second test circuit, filtering circuit is consistent with the frequency converter order of connection to be measured and direction.
The no-load voltage ratio of described isolating transformer is 1:1.
Described filtering circuit is RCL wave filter.
The advantage that the utility model has and good effect are: (1) can realize the function of multiple stage frequency converter burn-in test in parallel, improve testing efficiency, transformer instead of motor simultaneously, improves service life of equipment, make test more flexible, add operability; In the utility model, in each frequency converter test group, a frequency converter is inductive load, one is capacitive power load, when capacitive power load releases energy, inductive load absorption energy, and inductive load is when releasing energy, capacitive power load is but at absorption energy, energy is intercoursed between two kinds of loads, like this, be compensated in the reactive power that the reactive power that inductive load absorbs can be exported by capacitive power load, reduce the scale of energy exchange between load and power supply, Loss reducing, has accomplished the saving energy.
(2) no-load voltage ratio of isolating transformer is 1:1, makes control strategy more simple (namely without the need to increasing the program statement of voltage-regulation) on the one hand, reduces builtin voltage on the other hand and changes the loss brought.
Accompanying drawing explanation
The accompanying drawing forming a part of the present utility model is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is theory diagram of the present utility model;
Fig. 2 is that the energy of the utility model single inverter test group moves towards figure;
Fig. 3 is that the energy of the utility model multiple frequency converter test group moves towards figure.
Embodiment
It should be noted that, when not conflicting, the embodiment in the utility model and the feature in embodiment can combine mutually.
Below with reference to the accompanying drawings and describe the utility model in detail in conjunction with the embodiments.
As shown in Figure 1, be applicable to the test platform of even number frequency converter, comprise electrical network inlet wire L1, L2, L3, fuse FU, a circuit breaker Q F and frequency converter test group, described electrical network inlet wire L1, L2, L3 successively through serial connection fuse FU and circuit breaker Q F be that frequency converter test group is powered, described frequency converter test group comprises the first test circuit and the second test circuit that are arranged in parallel, described first test circuit and described second test circuit include the isolating transformer be linked in sequence successively, filtering circuit and frequency converter to be measured, the isolating transformer of described first test circuit is all connected described isolating switch with the frequency converter to be measured of described second test circuit, the frequency converter to be measured of described first test circuit connects the isolating transformer of the second test circuit by disconnector.
Also comprise n frequency converter test group, wherein, n >=1, in described n frequency converter test group, the first test circuit in a rear frequency converter test group and the first test circuit in last frequency converter test group are connected in series, the second test circuit in a rear frequency converter test group and the second test circuit in last frequency converter test group are connected in series, a disconnector is provided with between first test circuit junction of every two adjacent frequency converter test groups and the second test circuit junction, the frequency converter to be measured of the first test circuit of last frequency converter test group connects the isolating transformer of the second test circuit by disconnector, isolating transformer in each frequency converter test group in the first test circuit, filtering circuit is consistent with the frequency converter order of connection to be measured and direction, isolating transformer in each frequency converter test group in the second test circuit, filtering circuit is consistent with the frequency converter order of connection to be measured and direction.
N frequency converter test group realizes the mutual of energy by the disjunction of disconnector, makes overall electric energy realize circulation.
Integral energy flows to as shown in Figure 2 and Figure 3.Fig. 2 is the energy trend of single inverter test group, and now QS1 closes.Fig. 3 is the energy trend of multiple frequency converter test group, and disconnector QS1 to the QSn-1 now all disconnects, and only has last disconnector QSn to close.
The no-load voltage ratio of described isolating transformer is 1:1.
Described filtering circuit is RCL wave filter.Described filtering circuit comprises a three-phase reactor L, three phase capacitance C and connected resistance R.
By calculating the parameter learning electric capacity, reactance and resistance, and according to these parameter type selectings.
Principle of work: the burn-in test platform that the invention provides a kind of multiple frequency converter, this platform can debug multiple frequency converter simultaneously, and does not rely on generator.But need ensure that institute's tune frequency converter is even number, two frequency converters and corresponding isolating transformer, filtering circuit need be formed a frequency converter test group.Disjunction is carried out with a disconnector between each frequency converter test group.The electrical principle of this burn-in test platform as shown in Figure 1.
In alternating circuit, the electric current of pure resistance load and voltage in phase; 90 °, the phase place of the delayed phase voltage of the electric current of pure inductance load; The current phase of pure electric capacity is then ahead of voltage 90 °.That is: the phasing degree of the electric current in pure inductance and pure electric capacity is 180 °, can cancel each other, so when power supply is powered to load, the energy that inductive load outwards discharges by shnt capacitor by energy storage, when inductive load needs energy, then by electric capacity by fault offset out.Reactive power required for such inductive load can solve on the spot, reduces the scale of energy exchange between load and power supply, Loss reducing.
Its ultimate principle is having the device of capacitive power load and inductive load and being connected in same circuit, when capacitive power load releases energy, inductive load absorption energy, and inductive load is when releasing energy, capacitive power load is but at absorption energy, and energy is intercoursed between two kinds of loads.Like this, be compensated in the reactive power that the reactive power that inductive load absorbs can be exported by capacitive power load.
And in actual conditions, the load of pure perception or pure capacitive can not be there is, so beyond the reactive power of removing inside, need increase power supply input.Due to cancelling out each other of internal energy, the input of this power supply does not need too large, when the aging debugging simultaneously of the multiple frequency converter of needs, increases power supply power input.
This platform uses transformer to realize electrical isolation, and the no-load voltage ratio of transformer is 1:1, makes control strategy more simple (namely without the need to increasing the program statement of voltage-regulation) on the one hand, reduces builtin voltage on the other hand and changes the loss brought.
Fig. 1 is schematic diagram, controls the parallel connection of multi-frequency converter by disconnector.
Need ensure during each aging debugging that at least two frequency converters run, when increasing the frequency converter of debugging, can use disconnector QS1 ~ QSn that frequency converter 1 ~ frequency converter 1n to be measured to be measured is connected, the isolating transformer of described first test circuit is all connected described isolating switch with the frequency converter to be measured of described second test circuit, the frequency converter to be measured of described first test circuit connects the isolating transformer of the second test circuit by disconnector, frequency converter 2 ~ frequency converter 2n to be measured to be measured is as the same, so the frequency converter entering platform test is necessary for even number at every turn.
Can realize making in frequency converter in parallel by adjustment control parameter, one as capacitive power load, one as inductive load.The energy carried out between capacitive inductive load is made mutually to do reactive-load compensation, the final object realizing test.
Above embodiment of the present utility model has been described in detail, but described content being only preferred embodiment of the present utility model, can not being considered to for limiting practical range of the present utility model.All equalizations done according to the utility model scope change and improve, and all should still belong within this patent covering scope.
Claims (5)
1. be applicable to the test platform of even number frequency converter, it is characterized in that: comprise electrical network inlet wire, fuse, isolating switch and a frequency converter test group, described electrical network inlet wire successively through serial connection fuse and isolating switch be that frequency converter test group is powered, described frequency converter test group comprises the first test circuit and the second test circuit that are arranged in parallel, described first test circuit and described second test circuit include the isolating transformer be linked in sequence successively, filtering circuit and frequency converter to be measured, the isolating transformer of described first test circuit is all connected described isolating switch with the frequency converter to be measured of described second test circuit, the frequency converter to be measured of described first test circuit connects the isolating transformer of the second test circuit by disconnector.
2. the test platform being applicable to even number frequency converter according to claim 1, it is characterized in that: also comprise n frequency converter test group, wherein, n >=1, in described n frequency converter test group, the first test circuit in a rear frequency converter test group and the first test circuit in last frequency converter test group are connected in series, the second test circuit in a rear frequency converter test group and the second test circuit in last frequency converter test group are connected in series, a disconnector is provided with between first test circuit junction of every two adjacent frequency converter test groups and the second test circuit junction, the frequency converter to be measured of the first test circuit of last frequency converter test group connects the isolating transformer of the second test circuit by disconnector, isolating transformer in each frequency converter test group in the first test circuit, filtering circuit is consistent with the frequency converter order of connection to be measured and direction, isolating transformer in each frequency converter test group in the second test circuit, filtering circuit is consistent with the frequency converter order of connection to be measured and direction.
3. the test platform being applicable to even number frequency converter according to claim 1 and 2, is characterized in that: the no-load voltage ratio of described isolating transformer is 1:1.
4. the test platform being applicable to even number frequency converter according to claim 1 and 2, is characterized in that: described filtering circuit is RCL wave filter.
5. the test platform being applicable to even number frequency converter according to claim 3, is characterized in that: described filtering circuit is RCL wave filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520908504.3U CN205120872U (en) | 2015-11-13 | 2015-11-13 | Test platform suitable for an even number converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520908504.3U CN205120872U (en) | 2015-11-13 | 2015-11-13 | Test platform suitable for an even number converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205120872U true CN205120872U (en) | 2016-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520908504.3U Expired - Fee Related CN205120872U (en) | 2015-11-13 | 2015-11-13 | Test platform suitable for an even number converter |
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| Country | Link |
|---|---|
| CN (1) | CN205120872U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872745A (en) * | 2018-06-26 | 2018-11-23 | 深圳市易优电气有限公司 | Frequency converter aging testing system |
| CN114156069A (en) * | 2021-11-09 | 2022-03-08 | 阿坝铝厂 | System and method for testing short-circuit resistance of voltage-regulating rectifier transformer |
-
2015
- 2015-11-13 CN CN201520908504.3U patent/CN205120872U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872745A (en) * | 2018-06-26 | 2018-11-23 | 深圳市易优电气有限公司 | Frequency converter aging testing system |
| CN114156069A (en) * | 2021-11-09 | 2022-03-08 | 阿坝铝厂 | System and method for testing short-circuit resistance of voltage-regulating rectifier transformer |
| CN114156069B (en) * | 2021-11-09 | 2023-07-28 | 阿坝铝厂 | System and method for testing short-circuit resistance of voltage-regulating rectifier transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20201113 |