CN206960640U - 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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- CN206960640U CN206960640U CN201720884773.XU CN201720884773U CN206960640U CN 206960640 U CN206960640 U CN 206960640U CN 201720884773 U CN201720884773 U CN 201720884773U CN 206960640 U CN206960640 U CN 206960640U
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Abstract
The utility model 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.The utility model 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
It the utility model is related to transducer check field, more particularly to a kind of GIS based on phase-shifting carrier wave multiple technology
Current transformer verifying 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 needs of 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) obtain more and more extensive application.To large velocity ratio, primary circuit length
GIS current transformers carry out on-site proving when, 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.
To experiment power supply, pressure regulator and rising current transformer capacity requirement mistake during in order to solve the verification of GIS current transformers
The problem of big, typically indirect method is used in substation field experiment：First, at low currents extrapolation, i.e., pass through
The load of increase current transformer verifies to error；Second, using the instrument 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, reduce 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
For feature, it is necessary to use appropriate reactive-load compensation method again, the size of regulation compensating electric capacity amount makes loop reach resonant condition, makes work(
Close to 1, inductive reactive power and capacitive reactive power mutually balance each other rate factor, substantially reduce 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 be less using 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.
Utility model content
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 of multiple power models is in parallel, output end is 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 more level topological structures.
The GIS current transformer verifying power supply bags based on phase-shifting carrier wave multiple technology that the utility model embodiment provides
Diode uncontrollable rectifier unit, DC bus capacitance unit and the DC/AC power converter cells being sequentially connected in series are included, wherein, institute
Stating diode uncontrollable rectifier unit includes multiple power models, and the DC bus capacitance unit includes multiple electrochemical capacitor moulds
Block, the DC/AC power converter cells include multiple inverters；The each power model, electrochemical capacitor module and inverter
It is sequentially connected in series, the output end of multiple inverters is in parallel, the number of the power model, electrochemical capacitor module and inverter
It is equal.The utility model embodiment eliminates pressure regulator link, reactive-load compensation link, rising current transformer link, can not only
Generate preferable current waveform, moreover it is possible to simulate amplitude fluctuations, frequency fluctuation, the harmonic wave in actual condition, school can be greatly reduced
The volume and weight in electrical verification source, field-checking ability and operating efficiency are improved, reduces cost, electricity is verified in GIS current transformers
Source domain has significant advantage.
Brief description of the drawings
In order to illustrate more clearly of the technical solution of the utility model, below by the required accompanying drawing used in embodiment
It is briefly described, it should be apparent that, for those of ordinary skills, do not paying the premise of creative labor
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the verification of the GIS current transformers based on phase-shifting carrier wave multiple technology that the utility model embodiment provides
The structural representation of power supply；
Fig. 2 is a kind of structural representation for single-phase two-level inverter that the utility model embodiment provides；
Fig. 3 is a kind of structural representation for single phase multilevel inverter that the utility model embodiment provides；
Fig. 4 is the verification of the GIS current transformers based on phase-shifting carrier wave multiple technology that the utility model embodiment provides
The control structure schematic diagram of power supply；
Fig. 5 is the carrier wave signal of 12 single-phase inverters of the specific embodiment that the utility model embodiment provides
Figure.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the utility model, below in conjunction with this reality
With the accompanying drawing in new embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described, it is clear that
Described embodiment is only the utility model part of the embodiment, rather than whole embodiments.
Referring to Fig. 1, the GIS current transformers based on phase-shifting carrier wave multiple technology provided for the utility model embodiment
The structural representation of verifying power supply, as shown in figure 1, the GIS current transformer verifying power supply bags that the utility model embodiment provides
Include, 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 of verifying power supply and capacitance grade as far as possible, total harmonic distortion of output current is reduced
Rate, efficiency and reliability is improved, reduce cost, 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 engineering is run, 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, and so as to carry out air blast cooling, it is necessary to explanation is to power diode, the fixed space of diode is not easy close
Envelope, prevent from being used to seal and causing heat dispersal situations to decline influences operation of the present utility model.
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 utility model embodiment, operationally electric current is bigger, single
Individual electric capacity is difficult to bear, therefore the utility model embodiment can use more electric capacity structure in parallel, electrochemical capacitor it is specific simultaneously
Join number by user's sets itself, be not limited herein, the utility model embodiment can also use the structure of electrochemical capacitor series connection
So as to be used for higher voltage.
Referring to Fig. 2, a kind of structural representation of the single-phase two-level inverter provided for the utility model embodiment, such as scheme
Shown in 2, the DC/AC power converter cells 3 in the GIS current transformer verifying power supplies that the utility model embodiment provides are using two electricity
Flat topological structure.
Referring to Fig. 3, a kind of structural representation of the single phase multilevel inverter provided for the utility model embodiment, such as scheme
Shown in 3, the DC/AC power converter cells 3 in the GIS current transformer verifying power supplies that the utility model embodiment provides can also use
More level topological structures.It should be noted that the more level topological structures referred in the utility model embodiment include three level and
Three level above various topological structures, the utility model embodiment Fig. 3 only give a kind of using the electricity of single-phase diode clamper three
The structural representation of flat inverter.
Referring to Fig. 4, the GIS current transformers based on phase-shifting carrier wave multiple technology provided for the utility model embodiment
The control structure schematic diagram of verifying power supply；Referring to Fig. 5, for 12 of a specific embodiment of the utility model embodiment offer
The carrier wave schematic diagram of single-phase inverter, 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 inverter parallel connection groups
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 modulating wave component U by current regulatorm1, in order to reduce current regulator burden, add feedforward control, output electricity
The value of feedback V of pressureoObtain modulating wave component U 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, it is abnormal in order to reduce total harmonic wave of output current
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 turns on and off.
The GIS current transformer verifying power supply bags based on phase-shifting carrier wave multiple technology that the utility model embodiment provides
Diode uncontrollable rectifier unit, DC bus capacitance unit and the DC/AC power converter cells being sequentially connected in series are included, wherein, institute
Stating diode uncontrollable rectifier unit includes multiple power models, and the DC bus capacitance unit includes multiple electrochemical capacitor moulds
Block, the DC/AC power converter cells include multiple inverters；The each power model, electrochemical capacitor module and inverter
It is sequentially connected in series, the output end of multiple inverters is in parallel, the number of the power model, electrochemical capacitor module and inverter
It is equal.The utility model embodiment eliminates pressure regulator link, reactive-load compensation link, rising current transformer link, can not only
Generate preferable current waveform, moreover it is possible to simulate amplitude fluctuations, frequency fluctuation, the harmonic wave in actual condition, school can be greatly reduced
The volume and weight in electrical verification source, field-checking ability and operating efficiency are improved, reduces cost, electricity is verified in GIS current transformers
Source domain has significant advantage.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property includes, so that process, method, article or equipment including a series of elements not only include those key elements, and
And also include the other element 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
State in process, method, article or the equipment of key element and other identical element also be present.
Described above is only specific embodiment of the present utility model, is made skilled artisans appreciate that or realizing this
Utility model.A variety of modifications to these embodiments will be apparent to one skilled in the art, institute herein
The General Principle of definition can be realized in other embodiments in the case where not departing from spirit or scope of the present utility model.
Therefore, the utility model is not intended to be limited to the embodiments shown herein, and is to fit to and original disclosed herein
The reason most wide scope consistent with features of novelty.
Above-described the utility model embodiment does not form the restriction to scope of protection of the utility model.
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 are 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
Independently of each other.
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 more level topological structures.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720884773.XU CN206960640U (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 |
|---|---|---|---|---|
| CN107144807A (en) * | 2017-07-20 | 2017-09-08 | 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 |
| 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 |
-
2017
- 2017-07-20 CN CN201720884773.XU patent/CN206960640U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107144807A (en) * | 2017-07-20 | 2017-09-08 | 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 |
| 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 |
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