CN107144807A - GIS current transformer verifying power supplies based on phase-shifting carrier wave multiple technology - Google Patents
GIS current transformer verifying power supplies based on phase-shifting carrier wave multiple technology Download PDFInfo
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- CN107144807A CN107144807A CN201710596286.8A CN201710596286A CN107144807A CN 107144807 A CN107144807 A CN 107144807A CN 201710596286 A CN201710596286 A CN 201710596286A CN 107144807 A CN107144807 A CN 107144807A
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- power
- electrochemical capacitor
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- power supply
- diode
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-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
-
- 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
-
- 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
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/493—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode the static converters being arranged for operation in parallel
-
- 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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/539—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
- H02M7/5395—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Inverter Devices (AREA)
Abstract
The present invention discloses a kind of GIS current transformer verifying power supplies based on phase-shifting carrier wave multiple technology, including, diode uncontrollable rectifier unit, DC bus capacitance unit and the DC/AC power converter cells being sequentially connected in series, wherein, stating 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 power model, electrochemical capacitor module and inverter are sequentially connected in series, and the output end of multiple inverters is in parallel, and the number of power model, electrochemical capacitor module and inverter is equal.Present invention eliminates pressure regulator link, reactive-load compensation link, rising current transformer link, preferable current waveform can not only be generated, amplitude fluctuations, frequency fluctuation, the harmonic wave in actual condition can also be simulated, the volume and weight of verifying power supply can be greatly reduced, field-checking ability and operating efficiency are improved, there is significant advantage in GIS current transformer verifying power supplies field.
Description
Technical field
The present invention relates to transducer check field, more particularly to a kind of GIS electric currents based on phase-shifting carrier wave multiple technology
Transducer check power supply.
Background technology
In recent years, China's power grid construction is in the high speed development stage, it is contemplated that sustainable development and construction economizing type society
The need for meeting, operational reliability is high, GIS (the Gas Insulated that floor space is small, easy to maintenance, security is good
Switchgear, gas-insulated gas insulated metal enclosed swit chgear) increasingly it is widely applied.Long to large velocity ratio, primary circuit
GIS current transformers when carrying out on-site proving, required experiment power supply, pressure regulator and rising current transformer capacity are very big, and
Because the reactance value in loop is much larger than resistance value, inductive reactive power capacity is much larger than active capacity.
In order to solve during the verification of GIS current transformers to experiment power supply, pressure regulator and rising current transformer capacity requirement mistake
Big the problem of, typically indirect method is used in substation field experiment：One is extrapolation, i.e., at low currents, pass through
The load of increase current transformer is verified to error；Two be to utilize the instruments such as TA analyzers, based on transformer mathematical modeling,
By applying secondary voltage calculation error.But the test condition of both approaches and the current transformer operating mode of actual motion are complete
Difference, reduces the reliability of test data.《JJG 1021-2007》The error of middle clear stipulaties detecting current transformer experiment
Measurement point is the 1%-120% of rated current, according to GIS current mutual inductor field detecting loop reactances value much larger than resistance value
Feature, it is necessary to use appropriate reactive-load compensation method again, and the size of regulation compensating electric capacity amount makes loop reach resonant condition, makes work(
Rate factor is close to 1, and inductive reactive power and capacitive reactive power mutually balance each other, and substantially reduces and experiment power supply, pressure regulator and up-flow are become
The capacity requirement of depressor.
From the prior art as can be seen that verifying power supply all must not in GIS current mutual inductor on site measurement verification cars at present
Can less use pressure regulator, switching capacitance reactive-load compensator and rising current transformer, and current transformer verifying power supply volume and
Weight is all larger, and the capacity of reactor is big during reactive-load compensation, electromagnetic stress is big, vibrations noise is big, and the mechanical fling-cut switch life-span
It is short, greatly reduce current mutual inductor on site error experimental work efficiency.
The content of the invention
To overcome problem present in correlation technique, following technical scheme is disclosed：
GIS current transformer verifying power supplies based on phase-shifting carrier wave multiple technology, including the diode being sequentially connected in series is not
Rectification unit, DC bus capacitance unit and DC/AC power converter cells are controlled, wherein, the diode uncontrollable rectifier unit
Including multiple power models, the DC bus capacitance unit includes multiple electrochemical capacitor modules, the DC/AC converters list
Member includes multiple inverters；The each power model, electrochemical capacitor module and inverter are sequentially connected in series, multiple inversions
The output end of device is in parallel, and the number of the power model, electrochemical capacitor module and inverter is equal.
Alternatively, the input parallel connection of multiple power models, output end are independent.
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 multiple electrochemical capacitors in parallel.
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 current transformers verifying power supply provided in an embodiment of the present invention based on phase-shifting carrier wave multiple technology include according to
Diode uncontrollable rectifier unit, DC bus capacitance unit and the DC/AC power converter cells of secondary series connection, wherein, described two
Pole pipe uncontrollable rectifier unit includes multiple power models, and the DC bus capacitance unit includes multiple electrochemical capacitor modules,
The DC/AC power converter cells include multiple inverters；The each power model, electrochemical capacitor module and inverter are successively
Series connection, the output end of multiple inverters is in parallel, and the number of the power model, electrochemical capacitor module and inverter is homogeneous
Deng.The embodiment of the present invention eliminates pressure regulator link, reactive-load compensation link, rising current transformer link, can not only generate ideal
Current waveform, moreover it is possible to simulate amplitude fluctuations, frequency fluctuation, the harmonic wave in actual condition, verifying power supply can be greatly reduced
Volume and weight, improves field-checking ability and operating efficiency, reduces cost, in GIS current transformer verifying power supplies field tool
There is significant advantage.
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 the GIS current transformer verifying power supplies provided in an embodiment of the present invention based on phase-shifting carrier wave multiple technology
Structural representation；
Fig. 2 is a kind of structural representation of single-phase two-level inverter provided in an embodiment of the present invention；
Fig. 3 is a kind of structural representation of single phase multilevel inverter provided in an embodiment of the present invention；
Fig. 4 is the GIS current transformer verifying power supplies provided in an embodiment of the present invention based on phase-shifting carrier wave multiple technology
Control structure schematic diagram；
Fig. 5 is the carrier wave schematic diagram of 12 single-phase inverters of a specific embodiment 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 the GIS current transformers verification provided in an embodiment of the present invention based on phase-shifting carrier wave multiple technology referring to Fig. 1
The structural representation of power supply, as shown in figure 1, GIS current transformers verifying power supply provided in an embodiment of the present invention includes, diode
Uncontrollable rectifier unit 1, DC bus capacitance unit 2 and DC/AC power converter cells 3.
Diode uncontrollable rectifier unit 1, DC bus capacitance unit 2 and DC/AC power converter cells 3 are sequentially connected in series.
Wherein, diode uncontrollable rectifier unit 1 includes multigroup power model, and each power model is by 380V power distribution network alternating currents
Pressure is rectified into DC voltage, and diode uncontrollable rectifier unit 1 only provides the active power of verifying power supply, sends electric energy to direct current
Bus capacitor unit 2.
DC bus capacitance unit 2 includes multigroup electrochemical capacitor module, and the power of output is predominantly idle, electrochemical capacitor
Module is the support that DC/AC power converter cells 3 provide DC bus-bar voltage, sends electric energy to DC/AC power converter cells 3.
In order to improve the current class and capacitance grade of verifying power supply as far as possible, total harmonic distortion of output current is reduced
Rate, improves efficiency and reliability, reduces cost, and DC/AC power converter cells 3 use phase-shifting carrier wave multiple technology.DC/AC is converted
Device unit 3 includes multigroup single-phase inverter, and every group of inverter numbering is respectively #1, #2 ..., #N, using output current closed loop control
System, the control of output voltage feedforward control, phase-shifting carrier wave multiplex, each single-phase inverter outlet side are in parallel, and eliminate pressure regulator
Link, reactive-load compensation link, rising current transformer link, this verifying power supply can not only generate preferable current waveform, additionally it is possible to
Simulate amplitude fluctuations, frequency fluctuation, the harmonic wave in actual condition.
The number of power model, electrochemical capacitor module and inverter is equal, each power model, electrochemical capacitor module
And inverter is sequentially connected in series, the output end of multiple inverters is in parallel.
Specifically, the parallel connection of multiple power model inputs, output end in diode uncontrollable rectifier unit 1 are independent, each
Power model includes a power diode, and power diode can produce substantial amounts of heat in operation engineering, therefore naturally cold
But it is difficult to meet requirement during operation, it is therefore desirable to air blast cooling is carried out to power diode, in order to meet to power diode
Air blast cooling is carried out, the power diode in multiple power models can be fixed in design in cupboard, and in cupboard
Radiator is set, so as to carry out air blast cooling to power diode, it is necessary to explanation is, the fixed space of diode is difficult close
Envelope, prevents the operation for causing heat dispersal situations to decline the influence present invention for sealing.
Multiple electrochemical capacitor modules in DC bus capacitance unit 2 are separate, and each electrochemical capacitor module includes
The electrochemical capacitor of multiple series connection or the electrochemical capacitor of parallel connection.Due to the embodiment of the present invention operationally electric current than larger, single electricity
Appearance is difficult to bear, thus the embodiment of the present invention can using many electric capacity structure in parallel, the specific number of parallel of electrochemical capacitor by
User's sets itself, is not limited herein, and the structure that the embodiment of the present invention can also be connected using electrochemical capacitor is so as to for higher
Voltage.
It is a kind of structural representation of single-phase two-level 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 3 in GIS current transformers verifying power supply provided in an embodiment of the present invention are using two level topology
Structure.
It is a kind of structural representation of single phase multilevel 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 3 in GIS current transformers verifying power supply provided in an embodiment of the present invention can also use many level
Topological structure.It should be noted that many level topological structures referred in the embodiment of the present invention are included more than three level and three level
Various topological structures, Fig. 3 of the embodiment of the present invention only gives a kind of structure of use single-phase diode clamper three-level inverter
Schematic diagram.
It is the GIS current transformers verification provided in an embodiment of the present invention based on phase-shifting carrier wave multiple technology referring to Fig. 4
The control structure schematic diagram of power supply；It is 12 single-phase inversions of a specific embodiment provided in an embodiment of the present invention referring to Fig. 5
The carrier wave schematic diagram of device, Fig. 4, Fig. 5 provide the control process of a specific embodiment.
The major parameter of verifying power supply device：Rated power 1MVA, rated active power 200kW, rated reactive power
979.8kVar；Input voltage 380V, output current 6000A；DC/AC power converter cells 3 are by 12 groups of single-phase inverters and joint group
Into every inverter input voltage 500V, output-current rating 500A.
The control strategy of each single-phase inverter is：Inductive current command value IL*Compared with value of feedback IL, error signal
Δ IL obtains modulation wave component U by current regulatorm1, in order to reduce current regulator burden, add feedforward control, output electricity
The value of feedback V of pressureoModulation wave component U is obtained through feedforward controllerm2, it is that can obtain modulation wave signal that two modulation wave components, which are added,
Um.Modulation wave signal UmBy pulse width modulation (PWM), drive pulse signal is obtained, in order to which the total harmonic wave for reducing output current is abnormal
Variability, using phase-shifting carrier wave.Fig. 5 provides the carrier wave schematic diagram of 12 single-phase inverters, and pulse signal is through Drive Protecting Circuit, control
Power semiconductor switch in single-phase inverter processed is turned on and off.
GIS current transformers verifying power supply provided in an embodiment of the present invention based on phase-shifting carrier wave multiple technology include according to
Diode uncontrollable rectifier unit, DC bus capacitance unit and the DC/AC power converter cells of secondary series connection, wherein, described two
Pole pipe uncontrollable rectifier unit includes multiple power models, and the DC bus capacitance unit includes multiple electrochemical capacitor modules,
The DC/AC power converter cells include multiple inverters；The each power model, electrochemical capacitor module and inverter are successively
Series connection, the output end of multiple inverters is in parallel, and the number of the power model, electrochemical capacitor module and inverter is homogeneous
Deng.The embodiment of the present invention eliminates pressure regulator link, reactive-load compensation link, rising current transformer link, can not only generate ideal
Current waveform, moreover it is possible to simulate amplitude fluctuations, frequency fluctuation, the harmonic wave in actual condition, verifying power supply can be greatly reduced
Volume and weight, improves field-checking ability and operating efficiency, reduces cost, in GIS current transformer verifying power supplies field tool
There is significant advantage.
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 (9)
1. the GIS current transformer verifying power supplies based on phase-shifting carrier wave multiple technology, it is characterised in that including what is be sequentially connected in series
Diode uncontrollable rectifier unit, DC bus capacitance unit and DC/AC power converter cells, wherein, the diode is not controlled
Rectification unit includes multiple power models, and the DC bus capacitance unit includes multiple electrochemical capacitor modules, the DC/AC
Power converter cells include multiple inverters；The each power model, electrochemical capacitor module and inverter are sequentially connected in series, multiple
The output end of the inverter is in parallel, and the number of the power model, electrochemical capacitor module and inverter is equal.
2. GIS current transformers verifying power supply as claimed in claim 1, it is characterised in that multiple power models it is defeated
Enter end parallel connection, output end independence.
3. GIS current 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 current 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 current transformers verifying power supply as claimed in claim 1, it is characterised in that multiple electrochemical capacitor modules
It is separate.
6. GIS current transformers verifying power supply as claimed in claim 5, it is characterised in that the electrochemical capacitor module includes
Multiple electrochemical capacitors in parallel.
7. GIS current 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.
8. GIS current 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.
9. GIS current 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710596286.8A CN107144807A (en) | 2017-07-20 | 2017-07-20 | GIS current transformer verifying power supplies based on phase-shifting carrier wave multiple technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710596286.8A CN107144807A (en) | 2017-07-20 | 2017-07-20 | GIS current transformer verifying power supplies based on phase-shifting carrier wave multiple technology |
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| CN107144807A true CN107144807A (en) | 2017-09-08 |
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| CN201710596286.8A Withdrawn CN107144807A (en) | 2017-07-20 | 2017-07-20 | GIS current transformer verifying power supplies based on phase-shifting carrier wave multiple technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448908A (en) * | 2018-04-02 | 2018-08-24 | 湖北工业大学 | A kind of GIS current transformer verifying power supplies based on three level of T-type |
| CN112350601A (en) * | 2020-10-30 | 2021-02-09 | 株洲中车时代电气股份有限公司 | Medium-voltage and medium-frequency inverter power supply for ROV |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101478249A (en) * | 2008-09-26 | 2009-07-08 | 国网武汉高压研究院 | A DC electric power used for large current transducer check |
| KR20100038491A (en) * | 2008-10-06 | 2010-04-15 | 김원호 | A generator for ozone reactor and the method for controlling it |
| CN105425193A (en) * | 2016-01-12 | 2016-03-23 | 江苏省电力公司电力科学研究院 | Extra-high-voltage current transformer verification system |
| WO2016064725A1 (en) * | 2014-10-20 | 2016-04-28 | Momentum Dynamics Corporation | Method and apparatus for intrinsic power factor correction |
| CN206960640U (en) * | 2017-07-20 | 2018-02-02 | 云南电网有限责任公司电力科学研究院 | GIS current transformer verifying power supplies based on phase-shifting carrier wave multiple technology |
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2017
- 2017-07-20 CN CN201710596286.8A patent/CN107144807A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101478249A (en) * | 2008-09-26 | 2009-07-08 | 国网武汉高压研究院 | A DC electric power used for large current transducer check |
| KR20100038491A (en) * | 2008-10-06 | 2010-04-15 | 김원호 | A generator for ozone reactor and the method for controlling it |
| WO2016064725A1 (en) * | 2014-10-20 | 2016-04-28 | Momentum Dynamics Corporation | Method and apparatus for intrinsic power factor correction |
| CN105425193A (en) * | 2016-01-12 | 2016-03-23 | 江苏省电力公司电力科学研究院 | Extra-high-voltage current transformer verification system |
| CN206960640U (en) * | 2017-07-20 | 2018-02-02 | 云南电网有限责任公司电力科学研究院 | GIS current transformer verifying power supplies based on phase-shifting carrier wave multiple technology |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108448908A (en) * | 2018-04-02 | 2018-08-24 | 湖北工业大学 | A kind of GIS current transformer verifying power supplies based on three level of T-type |
| CN112350601A (en) * | 2020-10-30 | 2021-02-09 | 株洲中车时代电气股份有限公司 | Medium-voltage and medium-frequency inverter power supply for ROV |
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