CN203930010U - High voltage crossing proving installation - Google Patents
High voltage crossing proving installation Download PDFInfo
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- CN203930010U CN203930010U CN201420279233.5U CN201420279233U CN203930010U CN 203930010 U CN203930010 U CN 203930010U CN 201420279233 U CN201420279233 U CN 201420279233U CN 203930010 U CN203930010 U CN 203930010U
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- voltage
- impedance
- generating device
- high voltage
- proving installation
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Abstract
The utility model, relevant for a kind of high voltage crossing proving installation, for improving the voltage of the feeder ear of tested equipment, makes tested equipment bear the voltage higher than rated voltage, comprises low voltage generating device and transtat; Wherein, this low voltage generating device is connected with transtat.By the utility model, avoided the switching of capacitive reactance in prior art, reduced the risk of line voltage generation resonance, can realize accurately high voltage crossing test.
Description
Technical field
The utility model relates to field tests, particularly relates to a kind of high voltage crossing proving installation.
Background technology
Along with the development of new forms of energy, the continuous increase of wind-powered electricity generation and grid-connected capacity, the batch off-grid accident that unit causes because of voltage ripple of power network, increasing on the impact of electrical network.Various countries have proposed relevant standard in succession, require when voltage ripple of power network, and wind-powered electricity generation unit and photovoltaic generating system need to have certain tolerance.Wherein, what propose at first is the requirement of low voltage crossing, and dependence test device is divided into two classes substantially: a class is to utilize the voltage divider principle of series reactance and short-circuit reactance to form low-voltage; Another kind of is to utilize power electronic equipment to form variable voltage source.Therefore, the measuring technology of corresponding low voltage crossing and proving installation exploitation are early more ripe, and the research of electrical network high voltage crossing measuring technology relatively a little later.
But, along with the progressively appearance of associated electrical net high voltage crossing standard, more and more urgent for the research and development of test wind-powered electricity generation unit and photovoltaic generating system high voltage crossing ability.Current, there is the scheme of two kinds of high voltage crossing tests: a kind of is to change the short circuit induction reactance in low voltage crossing proving installation into capacitive reactance, utilize the input of capacitive reactance to form the high voltage of tested end, but the mode of this switching capacitance, if electric network impedance coupling is bad, can excite the resonance of line voltage, therefore this scheme has proposed very high requirement to impedance matching and control; Another kind is to utilize power electronic equipment to build voltage generator, can simulate low-voltage and high voltage, but this scheme is limited to the withstand voltage level of electronic power switch device, the voltage that can generate is restricted and can not meets test request, and use the electronic power switch device of higher voltage withstand class instead, its cost has again significantly and promotes.
Because the problem of above-mentioned existing existence, the inventor is based on being engaged in this type of product design manufacture abundant practical experience and professional knowledge for many years, and the utilization of cooperation scientific principle, positive research and innovation in addition, to founding a kind of high voltage crossing proving installation of new structure, can solve the problem of existing existence, make it have more practicality.Through constantly research, design, and after repeatedly studying sample and improving, finally create the utility model having practical value.
Summary of the invention
The purpose of this utility model is that a kind of high voltage crossing proving installation is being provided, and can realize accurately high voltage crossing test, and it is the extension of low voltage crossing technology, and engineering reliability is high, and cost is low, easily realizes.
The purpose of this utility model is to adopt following technical scheme to realize.The utility model provides a kind of high voltage crossing proving installation, for improving the voltage of the feeder ear of tested equipment, makes tested equipment bear the voltage higher than rated voltage, and it comprises low voltage generating device and transtat; Wherein, this low voltage generating device is connected with transtat.
The purpose of this utility model can also be further achieved by the following technical measures.
Aforesaid high voltage crossing proving installation, wherein this low voltage generating device comprises series impedance, short-circuit impedance and short circuiting switch; Wherein, this series impedance, short circuiting switch and short-circuit impedance are cascaded successively, and this series impedance is voltage input end, connection line impedance, and one end of this transtat connects the intermediate node of series impedance and short circuiting switch, the other end connects tested equipment.
Aforesaid high voltage crossing proving installation, wherein this low voltage generating device comprises series impedance, short-circuit impedance and short circuiting switch; Wherein, this series impedance, short circuiting switch and short-circuit impedance are cascaded successively, and the intermediate node of this series impedance and short circuiting switch is connected tested equipment, and one end of this transtat is voltage input end, connection line impedance, the other end connects series impedance.
Aforesaid high voltage crossing proving installation, wherein this low voltage generating device is selected power electronic equipment variable voltage source.
Aforesaid high voltage crossing proving installation, wherein this low voltage generating device also comprises by-pass switch, this by-pass switch is in parallel with series impedance.
The utility model compared with prior art has obvious advantage and beneficial effect.By technique scheme, the utlity model has following advantages and beneficial effect:
1, high voltage crossing proving installation of the present utility model, has avoided the switching of capacitive reactance in prior art, has reduced the risk of line voltage generation resonance, can realize accurately high voltage crossing test.
2, high voltage crossing proving installation of the present utility model, is the extension of low voltage crossing technology, and engineering reliability is high, and cost is low, easily realizes; And can realize different high voltage crossing grades.
Above-mentioned explanation is only the general introduction of technical solutions of the utility model, in order to better understand technological means of the present utility model, and can be implemented according to the content of instructions, and for above and other object of the present utility model, feature and advantage can be become apparent, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, be described in detail as follows.
Accompanying drawing explanation
Fig. 1: be the structural representation of the first embodiment of the utility model high voltage crossing proving installation.
Fig. 2: be the structural representation of the second embodiment of the utility model high voltage crossing proving installation.
Fig. 3: be the structural representation of the 3rd embodiment of the utility model high voltage crossing proving installation.
Fig. 4: be the structural representation of the 4th embodiment of the utility model high voltage crossing proving installation.
Fig. 5: be the structural representation of the 5th embodiment of the utility model high voltage crossing proving installation.
[main element symbol description]
1: high voltage crossing proving installation
2 low voltage generating device 3 transtats
Z
1: series impedance Z
2: short-circuit impedance
K: short circuiting switch Z
line: line impedance
4: tested equipment
5: power electronic equipment variable voltage source
6: by-pass switch
Embodiment
For further setting forth the utility model, be to reach technological means and the effect that predetermined goal of the invention is taked, below in conjunction with accompanying drawing and preferred embodiment, a kind of its embodiment of high voltage crossing proving installation, structure, feature and effect thereof to according to the utility model proposes, be described in detail as follows.
Consulting shown in Fig. 1, is the structural representation of the first embodiment of the utility model high voltage crossing proving installation.In reality, this high voltage crossing proving installation relates to three phase network, because three phase network is symmetrical, so in Fig. 1 the picture of equivalence one.This high voltage crossing proving installation 1 comprises low voltage generating device 2 and transtat 3, for improving the voltage of the feeder ear of tested equipment, makes tested equipment bear the voltage higher than rated voltage; Wherein, this low voltage generating device 2 is connected with transtat 3.In the utility model, this high voltage crossing proving installation 1 is mainly to utilize the reverse process of low voltage generating device 2 to form high voltage, at low voltage generating device 2, during in low-voltage state, by outputing to the voltage of the feeder ear of tested equipment after transtat 3, be normal working voltage; And during in normal condition, by outputing to the voltage of the feeder ear of tested equipment after transtat 3, be high voltage at low voltage generating device 2.
Concrete, then consult shown in Fig. 1, this low voltage generating device 2 comprises series impedance Z
1, short-circuit impedance Z
2with short circuiting switch K; Wherein, this series impedance Z
1, short circuiting switch K and short-circuit impedance Z
2be cascaded successively, in three phase network, this short-circuit impedance Z
2three-phase symmetrical impedance, mutual short circuit, this series impedance Z
1voltage input end, connection line impedance Z
line, and one end of this transtat 3 connects series impedance Z
1with the intermediate node of short circuiting switch K, the other end connects tested equipment 4.In actual test process, this low voltage generating device 2 is input ends, and this transtat 3 is output terminals, note adjusting the no-load voltage ratio of transtat 3, it is mated, to obtain different high voltage crossing grades with this low voltage generating device 2.
Again consult Fig. 1, the 1.3p.u high voltage crossing of take test is example, introduces in detail the course of work of the present utility model.
1, the no-load voltage ratio of transtat 3 is adjusted to 1:1.3;
2, by short-circuit impedance Z
2with series impedance Z
1with line impedance Z
lineimpedance ratio be adjusted into 1:0.3;
3, by connecting tested equipment 4 after short circuiting switch K closure, because of short-circuit impedance Z
2dividing potential drop effect, the original edge voltage of transtat 3 be (unit: p.u):
After the transtat 3 that this voltage is 1:1.3 through no-load voltage ratio, be reduced to 1p.u, supply with tested equipment 4, tested equipment 4 is normally worked;
4,, during high voltage test, short circuiting switch K is disconnected to short-circuit impedance Z
2be cut out, the original edge voltage of transtat 3 is about rated voltage 1p.u;
After the transtat 3 that this voltage is 1:1.3 through no-load voltage ratio, be raised as 1.3p.u, supply with tested equipment 4, tested equipment 4 enters high voltage crossing state;
5, the test duration arrives, again that short circuiting switch K is closed, short-circuit impedance Z
2again dropped into loop and carry out dividing potential drop, tested terminal voltage is restored to rated voltage, completes test process.
It should be noted that in the utility model, can be by adjusting no-load voltage ratio and the short-circuit impedance Z of transtat 3
2with series impedance Z
1with line impedance Z
lineimpedance ratio, obtain different high voltage crossing grades.If the no-load voltage ratio of transtat 3 is adjusted into 1, do not affect original low voltage crossing test function.
Consulting shown in Fig. 2, is the structural representation of the second embodiment of the utility model high voltage crossing proving installation.Compared to the embodiment of Fig. 1, the high voltage crossing proving installation 1 of the present embodiment is that its ingredient is the same by low voltage generating device 2 and transtat 3 transpositions.Concrete, this series impedance Z
1, short circuiting switch K and short-circuit impedance Z
2be cascaded successively, in three phase network, this short-circuit impedance Z
2three-phase symmetrical impedance, mutual short circuit, this series impedance Z
1be connected tested equipment 4 with the intermediate node of short circuiting switch K, and one end of this transtat 3 is voltage input end, connection line impedance Z
line, the other end connects series impedance Z
1.In simple terms, this embodiment also can realize the function of high voltage crossing test, but existent defect, its shortcoming is: transtat 3 is at short-circuit impedance Z
2between input time, bear equipment under test branch road and short-circuit impedance Z
2the two-part electric current of branch road is larger to the capacity requirement of transtat 3.
Consulting shown in Fig. 3, is the structural representation of the 3rd embodiment of the utility model high voltage crossing proving installation.Compared to the embodiment of Fig. 1, the high voltage crossing proving installation 1 of the present embodiment is to replace low voltage generating device 2 with power electronic equipment variable voltage source 5, to realize the variation of voltage, completes high voltage crossing test.
In addition, consulting shown in Fig. 4 and Fig. 5, is the structural representation of the 4th and the 5th embodiment of the utility model high voltage crossing proving installation.Wherein, this low voltage generating device 2 also comprises by-pass switch 6, this by-pass switch 6 and series impedance Z
1parallel connection, can play short circuit series impedance Z
1effect (under this state, short circuiting switch K all the time closed).At test period, by-pass switch 6 is closed with short circuit series impedance Z all the time
1, short-circuit impedance Z
2all the time hanging net operation.Concrete, before test, by-pass switch 6 is disconnected to series impedance Z
1seal in loop, with short-circuit impedance Z
2form impedance dividing potential drop, the voltage after dividing potential drop boosts after reduction through transtat 3, tested end rated voltage operation; And when test, by by-pass switch 6 closures, series impedance Z
1by short circuit, no longer impedance dividing potential drop, voltage (high voltage) after transtat 3 boosts is added to tested end; After having tested, again by-pass switch 6 is disconnected, tested terminal voltage is recovered normal condition.
The above, it is only preferred embodiment of the present utility model, not the utility model is done to any pro forma restriction, although the utility model discloses as above with preferred embodiment, yet not in order to limit the utility model, any those skilled in the art, do not departing within the scope of technical solutions of the utility model, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solutions of the utility model, any simple modification of above embodiment being done according to technical spirit of the present utility model, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (6)
1. a high voltage crossing proving installation, for improving the voltage of the feeder ear of tested equipment, makes tested equipment bear the voltage higher than rated voltage, it is characterized in that it comprises:
Low voltage generating device and transtat; Wherein, this low voltage generating device is connected with transtat; This low voltage generating device comprises series impedance, short-circuit impedance and short circuiting switch; Wherein, this series impedance, short circuiting switch and short-circuit impedance are cascaded successively, and this series impedance is voltage input end, connection line impedance, and one end of this transtat connects the intermediate node of series impedance and short circuiting switch, the other end connects tested equipment.
2. high voltage crossing proving installation according to claim 1, is characterized in that wherein this low voltage generating device is selected power electronic equipment variable voltage source.
3. high voltage crossing proving installation according to claim 1, is characterized in that wherein this low voltage generating device also comprises by-pass switch, and this by-pass switch is in parallel with series impedance.
4. a high voltage crossing proving installation, for improving the voltage of the feeder ear of tested equipment, makes tested equipment bear the voltage higher than rated voltage, it is characterized in that it comprises:
Low voltage generating device and transtat; Wherein, this low voltage generating device is connected with transtat; This low voltage generating device comprises series impedance, short-circuit impedance and short circuiting switch; Wherein, this series impedance, short circuiting switch and short-circuit impedance are cascaded successively, and the intermediate node of this series impedance and short circuiting switch is connected tested equipment, and one end of this transtat is voltage input end, connection line impedance, the other end connects series impedance.
5. high voltage crossing proving installation according to claim 4, is characterized in that wherein this low voltage generating device is selected power electronic equipment variable voltage source.
6. high voltage crossing proving installation according to claim 4, is characterized in that wherein this low voltage generating device also comprises by-pass switch, and this by-pass switch is in parallel with series impedance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420279233.5U CN203930010U (en) | 2014-05-28 | 2014-05-28 | High voltage crossing proving installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420279233.5U CN203930010U (en) | 2014-05-28 | 2014-05-28 | High voltage crossing proving installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203930010U true CN203930010U (en) | 2014-11-05 |
Family
ID=51825807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420279233.5U Expired - Fee Related CN203930010U (en) | 2014-05-28 | 2014-05-28 | High voltage crossing proving installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203930010U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388382A (en) * | 2015-12-10 | 2016-03-09 | 鞍山荣泰电力电子有限公司 | Chain type SVG-based photovoltaic inverter high-voltage ride-through test system |
| CN105388383A (en) * | 2015-12-10 | 2016-03-09 | 鞍山荣泰电力电子有限公司 | SVG-based mobile high-voltage ride-through test device |
| CN105388430A (en) * | 2015-12-10 | 2016-03-09 | 鞍山荣泰电力电子有限公司 | Photovoltaic inverter voltage swell test system |
-
2014
- 2014-05-28 CN CN201420279233.5U patent/CN203930010U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105388382A (en) * | 2015-12-10 | 2016-03-09 | 鞍山荣泰电力电子有限公司 | Chain type SVG-based photovoltaic inverter high-voltage ride-through test system |
| CN105388383A (en) * | 2015-12-10 | 2016-03-09 | 鞍山荣泰电力电子有限公司 | SVG-based mobile high-voltage ride-through test device |
| CN105388430A (en) * | 2015-12-10 | 2016-03-09 | 鞍山荣泰电力电子有限公司 | Photovoltaic inverter voltage swell test system |
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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: 20141105 Termination date: 20160528 |