CN107196524A - A kind of GIS voltage transformers verifying power supply - Google Patents
A kind of GIS voltage transformers verifying power supply Download PDFInfo
- Publication number
- CN107196524A CN107196524A CN201710595966.8A CN201710595966A CN107196524A CN 107196524 A CN107196524 A CN 107196524A CN 201710595966 A CN201710595966 A CN 201710595966A CN 107196524 A CN107196524 A CN 107196524A
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- power
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- electrochemical capacitor
- voltage transformers
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- 239000003990 capacitor Substances 0.000 claims abstract description 28
- 238000004804 winding Methods 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000001447 compensatory effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The present invention discloses a kind of GIS voltage transformers verifying power supply, including transformer unit, diode uncontrollable rectifier unit, DC bus capacitance unit and DC/AC power converter cells, wherein, transformer unit is wound including multiple secondary sides, diode uncontrollable rectifier unit includes multiple power models, DC bus capacitance unit includes multiple electrochemical capacitor modules, and DC/AC power converter cells include multiple inverters；Each secondary side winding is connected with a power model, each power model, electrochemical capacitor module and inverter are sequentially connected in series, the output end of multiple inverters is sequentially connected in series, secondary side winding, power model, electrochemical capacitor module and inverter number it is equal.Present invention eliminates reactive-load compensation link, coordinate step-up transformer, preferable voltage waveform can not only be generated, moreover it is possible to simulate amplitude fluctuations, frequency fluctuation, the harmonic wave in actual condition, the volume and weight of verifying power supply can be effectively reduced, field-checking ability and operating efficiency is improved.
Description
Technical field
The present invention relates to transducer check field, more particularly to a kind of GIS voltage transformers verifying power supply.
Background technology
With the fast development of China's electric utility, traditional prevailing AIS (Air Insulated
Switchgear, air insulation power distribution equipment) gradually show by GIS that (Gas Insulated Switchgear, gas is exhausted
Edge fully closed combined electric unit) trend that is replaced.Because voltage transformer is electric energy metrical important component in GIS, it
Accuracy is played an important role for the trade settlement of power supplying and generating enterprises, it is therefore desirable to regularly error checking is carried out to it, and
The electric power mutual-inductor majority that power plant and substation field are used belongs to high voltage, the installing type transformer of high current, therefore
It must verify at the scene, to prevent the generation of major accident.
When being verified to voltage transformer in GIS, it is impossible to completely that voltage transformer is independent, it is necessary to take certain intervals
The bus of number and certain length, with certain direct-to-ground capacitance, there is capacity current, due to GIS air chamber pipeline chis during boosting
Very little specification is different, length differs and wiring arrangement is unified not to the utmost, causes the uncertainty of GIS pipeline capacitances, because
This current voltage transformer verifying power supply mainly adds the scheme of switching reactor reactive-load compensation using pressure regulator, due to pipeline electric capacity
Amount is uncertain, need to adjust reactor switching number during reactive-load compensation repeatedly.Due to high-voltage adjustable reactor difficult design, at present in reality
One mesolow compensative winding of design in step-up transformer is often taken in the product of border, it is adjustable that this compensative winding connects low pressure
Reactor is compensated, and the electric capacity for absorbing a large amount of capacitive reactive powers is present in primary circuit, and the secondary side become in boosting can only be compensated
The capacity of pressure regulator, the capacity become that boosts still is obtained as the capacity once needed.
However, existing GIS voltage transformers verifying power supply volume and weight is all larger, the appearance of reactor during reactive-load compensation
Amount is big, electromagnetic stress is big, vibrations noise is big, and mechanical fling-cut switch short life, greatly reduces voltage transformer site error
Experiment work efficiency.
The content of the invention
To overcome problem present in correlation technique, following technical scheme is disclosed：
A kind of GIS voltage transformers verifying power supply, including transformer unit, the diode uncontrollable rectifier list being sequentially connected in series
Member, DC bus capacitance unit and DC/AC power converter cells, wherein, the transformer unit include multiple secondary sides around
Resistance, the diode uncontrollable rectifier unit includes multiple power models, and the DC/AC power converter cells include multiple inverters；
The DC bus capacitance unit includes multiple electrochemical capacitor modules；Each secondary side winding and a power model string
Connection, each power model, electrochemical capacitor module and inverter are sequentially connected in series, and the output end of multiple inverters is successively
Series connection, the secondary side winding, power model, electrochemical capacitor module and inverter number it is equal.
Alternatively, multiple power models are sequentially connected in series.
Alternatively, each power model includes a diode, and the diode is power diode.
Alternatively, the diode uncontrollable rectifier unit also includes the radiator for air blast cooling.
Alternatively, multiple electrochemical capacitor modules are separate.
Alternatively, the electrochemical capacitor module includes the electrochemical capacitor of two series connection.
Alternatively, the DC/AC power converter cells use two level topological structures.
Alternatively, the DC/AC power converter cells use many level topological structures.
GIS voltage transformers verifying power supply provided in an embodiment of the present invention, including be sequentially connected in series transformer unit, two poles
Pipe uncontrollable rectifier unit, DC bus capacitance unit and DC/AC power converter cells, wherein, the transformer unit includes
Multiple secondary side windings, the diode uncontrollable rectifier unit includes multiple power models, and the DC/AC power converter cells include
Multiple inverters；The DC bus capacitance unit includes multiple electrochemical capacitor modules；Each secondary side winding and one
Individual power model series connection, each power model, electrochemical capacitor module and inverter are sequentially connected in series, multiple inverters
Output end be sequentially connected in series, the secondary side winding, power model, electrochemical capacitor module and inverter number it is equal.
The embodiment of the present invention eliminates reactive-load compensation link, coordinates step-up transformer, can not only generate preferable voltage waveform, moreover it is possible to
Amplitude fluctuations, frequency fluctuation, the harmonic wave in actual condition are simulated, reduces the volume and weight of verifying power supply, field-checking is improved
Ability and operating efficiency, reduce cost, have significant advantage in GIS voltage transformer verifying power supplies field.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, letter will be made to the required accompanying drawing used in embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of structural representation of GIS voltage transformers verifying power supply provided in an embodiment of the present invention；
Fig. 2 is a kind of structural representation of single phase multilevel inverter provided in an embodiment of the present invention；
Fig. 3 is a kind of structural representation of single-phase two-level inverter provided in an embodiment of the present invention；
Fig. 4 is a kind of control structure schematic diagram of GIS voltage transformers verifying power supply provided in an embodiment of the present invention.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the present invention, below in conjunction with of the invention real
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described implementation
Example only a part of embodiment of the invention, rather than whole embodiments.
It is a kind of structural representation of GIS voltage transformers verifying power supply provided in an embodiment of the present invention, such as referring to Fig. 1
Shown in Fig. 1, GIS voltage transformers verifying power supply provided in an embodiment of the present invention includes, and transformer unit 1, diode are not controlled whole
Flow unit 2, DC bus capacitance unit 3 and DC/AC power converter cells 4.
Transformer unit 1, diode uncontrollable rectifier unit 2, DC bus capacitance unit 3 and DC/AC converter lists
Member 4 is sequentially connected in series.
Wherein, transformer unit 1 is using three-phase voltage increasing isolating transformer, comprising a first winding and multiple secondary
Winding, is boosted to the 380V three-phase voltages of input and plays electrical isolation, only provide GIS provided in an embodiment of the present invention
The active power of voltage transformer verifying power supply, sends electric energy to diode uncontrollable rectifier unit 2.
Diode uncontrollable rectifier unit 2 includes multigroup power model, the exchange that each power model exports transformer unit 1
Voltage commutation also only provides GIS voltage transformers provided in an embodiment of the present invention into DC voltage, diode uncontrollable rectifier unit 2
The active power of verifying power supply, sends electric energy to DC bus capacitance unit 3.
DC bus capacitance unit 3 includes multigroup electrochemical capacitor module, realizes the support of DC bus-bar voltage, electrolysis electricity
Molar block is that DC/AC power converter cells 4 provide higher positive voltage, negative voltage and no-voltage, sends electric energy to DC/AC conversion
Device unit 4.
In order to improve the voltage class and capacitance grade of verifying power supply as far as possible, total harmonic distortion of output voltage is reduced
Rate, improves efficiency and reliability, reduces cost, and DC/AC power converter cells 4 use single phase multilevel inverter concatenation technology.DC/
AC power converter cells 4 include multigroup single phase multilevel inverter, and every group of inverter numbering is respectively #1, #2 ..., #N, using electricity
Current voltage double-closed-loop control, feedforward control and dc bus unbalance control, outlet side are sequentially connected in series, and eliminate reactive-load compensation
Link, coordinates step-up transformer, and GIS voltage transformers verifying power supply provided in an embodiment of the present invention can not only be generated preferably
Voltage waveform, moreover it is possible to simulate amplitude fluctuations, frequency fluctuation, the harmonic wave in actual condition.
Secondary side winding, power model, electrochemical capacitor module and inverter number it is equal, each secondary side winding
Connected with a power model, each power model, electrochemical capacitor module and inverter are sequentially connected in series, multiple inverters it is defeated
Go out end to be sequentially connected in series.
Specifically, multiple power models in diode uncontrollable rectifier unit 2 are sequentially connected in series, each power model includes one
Individual power diode, power diode can produce substantial amounts of heat in operation engineering, therefore natural cooling is difficult to meet operation
When must ask, it is therefore desirable to power diode carry out air blast cooling, in order to meet to power diode carry out air blast cooling,
The power diode in multiple power models can be fixed on during design in cupboard, and radiator is set in cupboard, so that
Air blast cooling is carried out to power diode, it is necessary to which explanation is, the fixed space of diode is difficult sealing, prevents for sealing
Heat dispersal situations are caused to decline the operation of the influence present invention.
Multiple electrochemical capacitor modules in DC bus capacitance unit 3 are separate, and each electrochemical capacitor module includes
The electrochemical capacitor of two series connection.Due to the embodiment of the present invention, operationally voltage ratio is higher, and the pressure-resistant of single electric capacity is difficult to bear,
Therefore two electrochemical capacitors of series connection are needed to be used for higher voltage
It is a kind of structural representation of single phase multilevel inverter provided in an embodiment of the present invention, such as Fig. 2 institutes referring to Fig. 2
Show, the DC/AC power converter cells 4 in GIS voltage transformers verifying power supply provided in an embodiment of the present invention are using many level topology
Structure, it is necessary to explanation to be that many level topological structures referred in the embodiment of the present invention include more than three level and three level a variety of
Topological structure, shows here, the embodiment of the present invention only gives a kind of structure of use single-phase diode clamper three-level inverter
It is intended to.
It is a kind of structural representation of single-phase two-level inverter provided in an embodiment of the present invention, such as Fig. 3 institutes referring to Fig. 3
Show, the DC/AC power converter cells 4 in GIS voltage transformers verifying power supply provided in an embodiment of the present invention can also use two level
Topological structure.
It is a kind of control structure schematic diagram of GIS voltage transformers verifying power supply provided in an embodiment of the present invention referring to Fig. 4,
For the embodiment of the present invention, Fig. 4 provides the control structure schematic diagram of a specific embodiment.
The major parameter of verifying power supply device：Rated power 1.5MVA, rated active power 100kW, rated reactive power
1.497MVar；Input voltage 380V, output voltage 10kV；DC/AC power converter cells 4 are by 12 groups of electricity of single-phase diode clamper three
Flat inverter is composed in series, every inverter output voltage 833V, output-current rating 150A；DC bus-bar voltage 3kV；Transformation
Device rated capacity 120kVA.
The control strategy of each single-phase diode clamper three-level inverter is：The command value of output voltageWith value of feedback
VoCompare, error signal Δ VoThe increment Delta I of output current is obtained through voltage regulatoro, with output current IoAddition is obtained
The command value IL of inductive current*；Inductive current command value IL*Compared with value of feedback IL, error signal Δ IL is adjusted through overcurrent
Device obtains modulation wave component Um1, in order to reduce voltage, current regulator burden, add feedforward control, the value of feedback of output voltage
VoModulation wave component U is obtained through feedforward controllerm2, it is that can obtain modulation wave signal U that two modulation wave components, which are added,m；For reality
Existing DC bus-bar voltage neutral balance, adds uneven adjuster, VpAnd VnCompare, error signal Δ VdcBy imbalance tune
Section device obtains offset signal Umo；Modulation wave signal UmWith offset signal UmoBy pulse width modulation, driving pulse is obtained
Signal, in order to reduce the total harmonic distortion factor of output voltage, using phase-shifting carrier wave；Pulse signal is through Drive Protecting Circuit, control
Power semiconductor switch in single-phase diode clamper three-level inverter is turned on and off.
GIS voltage transformers verifying power supply provided in an embodiment of the present invention, including be sequentially connected in series transformer unit, two poles
Pipe uncontrollable rectifier unit, DC bus capacitance unit and DC/AC power converter cells, wherein, the transformer unit includes
Multiple secondary side windings, the diode uncontrollable rectifier unit includes multiple power models, and the DC/AC power converter cells include
Multiple inverters；The DC bus capacitance unit includes multiple electrochemical capacitor modules；Each secondary side winding and one
Individual power model series connection, each power model, electrochemical capacitor module and inverter are sequentially connected in series, multiple inverters
Output end be sequentially connected in series, the secondary side winding, power model, electrochemical capacitor module and inverter number it is equal.
The embodiment of the present invention eliminates reactive-load compensation link, coordinates step-up transformer, can not only generate preferable voltage waveform, moreover it is possible to
Amplitude fluctuations, frequency fluctuation, the harmonic wave in actual condition are simulated, the volume and weight of verifying power supply can be reduced, scene is improved
Checking feature and operating efficiency, reduce cost, have significant advantage in GIS voltage transformer verifying power supplies field.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property is included, so that process, method, article or equipment including a series of key elements not only include those key elements, and
And also including other key elements being not expressly set out, or also include for this process, method, article or equipment institute inherently
Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including institute
Also there is other identical element in process, method, article or the equipment of stating key element.
Described above is only the embodiment of the present invention, is made skilled artisans appreciate that or realizing this hair
It is bright.A variety of modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Invention described above embodiment is not intended to limit the scope of the present invention..
Claims (8)
1. a kind of GIS voltage transformers verifying power supply, it is characterised in that including be sequentially connected in series transformer unit, diode not
Rectification unit, DC bus capacitance unit and DC/AC power converter cells are controlled, wherein, the transformer unit includes multiple
Secondary side is wound, and the diode uncontrollable rectifier unit includes multiple power models, and the DC/AC power converter cells include multiple
Inverter；The DC bus capacitance unit includes multiple electrochemical capacitor modules；Each secondary side winding and a work(
Rate block coupled in series, each power model, electrochemical capacitor module and inverter are sequentially connected in series, multiple inverters it is defeated
Go out end to be sequentially connected in series, the secondary side winding, power model, electrochemical capacitor module and inverter number it is equal.
2. GIS voltage transformers verifying power supply as claimed in claim 1, it is characterised in that multiple power models are successively
Series connection.
3. GIS voltage transformers verifying power supply as claimed in claim 2, it is characterised in that each power model includes
One diode, the diode is power diode.
4. GIS voltage transformers verifying power supply as claimed in claim 3, it is characterised in that the diode uncontrollable rectifier list
Member also includes the radiator for air blast cooling.
5. GIS voltage transformers verifying power supply as claimed in claim 1, it is characterised in that multiple electrochemical capacitor modules
It is separate.
6. GIS voltage transformers verifying power supply as claimed in claim 5, it is characterised in that the electrochemical capacitor module includes
The electrochemical capacitor of two series connection.
7. GIS voltage transformers verifying power supply as claimed in claim 1, it is characterised in that the DC/AC power converter cells are adopted
With two level topological structures.
8. GIS voltage transformers verifying power supply as claimed in claim 1, it is characterised in that the DC/AC power converter cells are adopted
With many level topological structures.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199588A (en) * | 2018-01-30 | 2018-06-22 | 湖北工业大学 | A kind of GIS voltage transformer verifying power supplies of 27 level of Mixed cascading |
| CN108282099A (en) * | 2018-03-14 | 2018-07-13 | 湖北工业大学 | A kind of GIS voltage transformer verifying power supplies based on 81 level of Mixed cascading |
| CN110086371A (en) * | 2019-06-18 | 2019-08-02 | 阳光电源股份有限公司 | Inverter system and its DC bus ripple compensation method |
| CN110568235A (en) * | 2019-09-09 | 2019-12-13 | 广东安朴电力技术有限公司 | Intelligent high-voltage test power supply system and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108199588A (en) * | 2018-01-30 | 2018-06-22 | 湖北工业大学 | A kind of GIS voltage transformer verifying power supplies of 27 level of Mixed cascading |
| CN108282099A (en) * | 2018-03-14 | 2018-07-13 | 湖北工业大学 | A kind of GIS voltage transformer verifying power supplies based on 81 level of Mixed cascading |
| CN110086371A (en) * | 2019-06-18 | 2019-08-02 | 阳光电源股份有限公司 | Inverter system and its DC bus ripple compensation method |
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| CN110568235A (en) * | 2019-09-09 | 2019-12-13 | 广东安朴电力技术有限公司 | Intelligent high-voltage test power supply system and control method |
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