CN107677943A - A kind of High Voltage XLPE Power Cable and its annex fundamental wave superposition multiple-harmonic experimental rig - Google Patents
A kind of High Voltage XLPE Power Cable and its annex fundamental wave superposition multiple-harmonic experimental rig Download PDFInfo
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- CN107677943A CN107677943A CN201711016291.3A CN201711016291A CN107677943A CN 107677943 A CN107677943 A CN 107677943A CN 201711016291 A CN201711016291 A CN 201711016291A CN 107677943 A CN107677943 A CN 107677943A
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- 239000004703 cross-linked polyethylene Substances 0.000 title claims abstract description 41
- 229920003020 cross-linked polyethylene Polymers 0.000 title claims abstract description 41
- 238000012360 testing method Methods 0.000 claims abstract description 33
- 238000004804 winding Methods 0.000 claims description 8
- 239000003990 capacitor Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000013307 optical fiber Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- 239000002178 crystalline material Substances 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000002474 experimental method Methods 0.000 description 7
- 238000009413 insulation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 4
- 230000005404 monopole Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 4
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a kind of High Voltage XLPE Power Cable and its annex fundamental wave superposition multiple-harmonic experimental rig, it is related to power cable detection technique field.The High Voltage XLPE Power Cable and its annex fundamental wave superposition multiple-harmonic experimental rig, including AC power, fundamental wave superposition multiple-harmonic generating unit, fundamental wave superposition multiple-harmonic control unit, intermediate transformer, compensation reactor, standard capacitance unit, voltage analysis instrument and test loop unit；Transmission, the accurate control of each harmonic voltage magnitude and its content, fundamental voltage are superimposed the lower High Voltage XLPE Power Cable of multi resonant wave voltage effect and its dielectric test of annex with the overall-in-one control schema of multi resonant wave voltage with output, fundamental wave while realizing fundamental wave superposition multiple-harmonic voltage signal.
Description
Technical field
The invention belongs to power cable detection technique field, more particularly to a kind of High Voltage XLPE Power Cable and its annex fundamental wave to fold
Add harmonic test device.
Background technology
In recent years, as the rapid development of electric power network technique, diversification power demand continue to increase, batch (-type) distribution energy
A large amount of accesses in source, cause the complexity more and more higher of user side equipment, and mains by harmonics problem becomes getting worse.At present, city
Exist largely in the High Voltage XLPE Power Cable and its annex of fortune in utility grid and ferroelectric tractive power supply system, and cable termination accident
It is the main reason for causing cable run trip accident, and the influence pole that fundamental wave superposition Multi-harmonic Sources deteriorate to cable terminal insulation
To be obvious.It was verified that some conventional high-tension XLPE cable terminals, under fundamental wave superposition multiple-harmonic effect, its aging substantially adds
The acute, life-span greatly shortens, and even results in the generation of insulation fault.
Based on this, the present invention proposes a kind of High Voltage XLPE Power Cable and its annex fundamental wave superposition multiple-harmonic experimental rig, is used for
The dielectric test of High Voltage XLPE Power Cable and its annex, while fundamental wave is exported, realize superposition multi-frequency harmonic source
Accurate control and simulation.
The content of the invention
In view of the shortcomings of the prior art, the present invention provides a kind of High Voltage XLPE Power Cable and its superposition multiple-harmonic examination of annex fundamental wave
Experiment device.
The present invention is that solve above-mentioned technical problem by the following technical solutions：A kind of High Voltage XLPE Power Cable and its attached
Part fundamental wave is superimposed multiple-harmonic experimental rig, including AC power, fundamental wave superposition multiple-harmonic generating unit, fundamental wave superposition multiple-harmonic control
Unit, intermediate transformer, compensation reactor, standard capacitance unit, voltage analysis instrument and test loop unit processed；The exchange
Power supply, fundamental wave superposition multiple-harmonic generating unit, intermediate transformer, compensation reactor and standard capacitance unit are sequentially connected；Institute
Standard capacitance unit is stated also to be connected with the voltage analysis instrument, test loop unit respectively；The fundamental wave superposition multiple-harmonic control
Unit is also connected with the voltage analysis instrument, fundamental wave superposition multiple-harmonic generating unit respectively；
The fundamental wave is superimposed multiple-harmonic generating unit, for while fundamental wave is exported, realizing superposition multi-frequency harmonic source
Accurate control and simulation；The fundamental wave is superimposed multiple-harmonic control unit, for being superimposed the defeated of multiple-harmonic generating unit to fundamental wave
Go out voltage and carry out closed-loop control and regulation, the voltage signal of output is met the requirement that input is set；The intermediate transformer, use
The magnitude of voltage of setting is increased in the fundamental wave superposition harmonic voltage that fundamental wave is superimposed to the output of multiple-harmonic generating unit；The compensation electricity
Anti- device, for compensating fundamental wave superposition harmonic voltage；The standard capacitance unit, for measuring the phase of intermediate transformer output voltage
Close information；The voltage analysis instrument, for being analyzed input voltage signal and being separated, to obtain fundamental voltage amplitude and each
Subharmonic voltage amplitude and content, and relevant information is fed back into fundamental wave superposition multiple-harmonic control unit, so as to realize that fundamental wave is folded
Add the closed-loop control and regulation of harmonic test voltage；The test loop unit, for by High Voltage XLPE Power Cable and its annex
It is attached by Insulation Coordination requirement, to provide test loop.
Further, the fundamental wave superposition multiple-harmonic generating unit includes input filter module, the power mould being sequentially connected
Block and output filter module；The power model is made up of two back-to-back power cells by way of cascade, Mei Gesuo
The back-to-back power cell stated includes PWM rectifier bridges, DC side storage capacitor and the PWM inverter bridges being sequentially connected；Each
Described back-to-back power cell corresponds to an input filter module respectively, and the output ends of two input filter modules is respectively with two
The PWM rectifier bridges input connection of individual power cell back-to-back；The PWM rectifier bridges, for establishing steady dc voltage, institute
PWM inverter bridges are stated, for generating given voltage signal.The connected mode cascaded by two PWM inverter bridges inverter sides is formed
The main topological structure of power model, using monopole frequency multiplication phase-shifting carrier wave SPWM Technique, improve harmonic frequency, it is ensured that high
The accurate output of subharmonic；While fundamental wave is exported, the accurate control and simulation of superposition multi-frequency harmonic source are realized, is carried
High harmonic wave bandwidth so that fundamental wave superposition multiple-harmonic experimental rig of the present invention can preferably meet High Voltage XLPE Power Cable and its
The harmonic frequency requirement of annex fundamental wave superposition multiple-harmonic experiment.
Further, the output filter module and two input filter modules use RLC filtering modes.
Further, the fundamental wave superposition multiple-harmonic control unit includes master controller and cell controller, the master control
Device processed includes the master control DSP and master control FPGA being connected；The master control DSP and master control FPGA are superimposed multi resonant with the fundamental wave respectively
Ripple generating unit connects；The cell controller is superimposed multiple-harmonic generating unit with the fundamental wave respectively and master control FPGA is connected
Connect；The master control DSP is connected with host computer, for receiving instruction and the fundamental wave superposition multiple-harmonic generating unit letter that host computer issues
The upload of breath, at the same be additionally operable to system flow control, data processing, fundamental wave superposition multiple-harmonic generating unit major loop protection and
With the information exchange between master control FPGA；The master control FPGA, for realizing system state amount monitoring, fundamental wave superposition multiple-harmonic hair
Raw unit inversion control and its loop protection；The cell controller, for realizing rectification control and information monitoring, and issue
PWM rectifications and inversion control information.This control model of fundamental wave superposition multiple-harmonic control unit takes full advantage of DSP operation speed
Degree is soon and fpga logic handles the advantages of strong, realizes the independent control of PWM rectifications and inversion, it is ensured that control logic it is accurate
Property and reliability.
Further, the master control DSP is connected with master control FPGA by RS485.
Further, it is single to be superimposed multiple-harmonic generation by optical fiber with the fundamental wave respectively by the master control DSP and master control FPGA
Member connection；The cell controller is superimposed multiple-harmonic generating unit with the fundamental wave respectively by optical fiber and master control FPGA is connected
Connect.
Further, the master control DSP is connected by RS422 four-wire interfaces with host computer.
Further, the iron core of the intermediate transformer is air-gap-free iron core made of banding non-crystalline material winding；Its around
Group is high-tension coil and the coiling of low-voltage coil interval, and carries out segmentation coiling using multiple-grooved skeleton winding, can meet 50Hz~
2500Hz energy transmission, effectively reduce air gap leakage field and eddy-current loss；Fundamental wave is superimposed multi resonant using electromagnetic induction principle
The fundamental wave superposition harmonic voltage of ripple generating unit output is increased to the magnitude of voltage of setting, and height is acted on after compensated electric reactor compensation
XLPE cable and its annex test loop unit are pressed, so as to realize the dielectric test of related test product.
Further, the test loop unit includes two prefabricated cable terminals, two GIS air chambers and XLPE electricity
Cable；Described two prefabricated cable terminals are respectively the first prefabricated cable terminal and the second prefabricated cable terminal；Described two
Individual GIS air chambers are respectively the first GIS air chambers and the 2nd GIS air chambers；The first prefabricated cable terminal and the second prefabricated electricity
One end of cable terminal is inserted the first GIS air chambers and the 2nd GIS air chambers, the other end and is connected with each other by wire respectively；It is described
First GIS air chambers and the 2nd GIS air chambers are connected with each other by XLPE cable.
Compared with prior art, a kind of High Voltage XLPE Power Cable provided by the present invention and its superposition multiple-harmonic examination of annex fundamental wave
Experiment device, including AC power, fundamental wave superposition multiple-harmonic generating unit, fundamental wave superposition multiple-harmonic control unit, intermediate transformer,
Compensation reactor, standard capacitance unit, voltage analysis instrument and test loop unit；Realize fundamental wave superposition multi resonant wave voltage letter
Number while transmission, the accurate control of each harmonic voltage magnitude and its content, fundamental voltage it is integrated with multi resonant wave voltage
Control the dielectric test that the lower High Voltage XLPE Power Cable of multi resonant wave voltage effect and its annex are superimposed with output, fundamental wave；In addition, this
Fundamental wave is superimposed multiple-harmonic output voltage by the way of intermediate transformer and is increased to required magnitude of voltage by invention, is on the one hand carried
The high upper limit and capacity of experiment of output voltage, can be achieved the Insulation Test for the XLPE cable that voltage class is higher, length is larger；
On the other hand reduce the cascade quantity of back-to-back power cell in fundamental wave superposition multiple-harmonic generating unit, leaned against only with two
The mode of back of the body cascade of power units significantly reduces the complexity of monopole frequency multiplication phase-shifting carrier wave SPWM Technique control logic
Property, reduce it is multiple back-to-back coordination is possible to caused inconsistency between power cells, improve fundamental wave superposition multi resonant
The accuracy and reliability of ripple test voltage generation.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, the required accompanying drawing used in being described below to embodiment
It is briefly described, it should be apparent that, drawings in the following description are only one embodiment of the present of invention, general for this area
For logical technical staff, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of a kind of High Voltage XLPE Power Cable of the present invention and its annex fundamental wave superposition multiple-harmonic experimental rig
Figure；
Fig. 2 is the structural representation of fundamental wave superposition multiple-harmonic generating unit major loop of the present invention；
Fig. 3 is the theory diagram of fundamental wave superposition multiple-harmonic control unit of the present invention；
Wherein：1- AC powers, 2- fundamental waves superposition multiple-harmonic generating unit, 3- intermediate transformers, 4- compensation reactors, 5- standards
Capacitor cell, 6- voltage analysis instrument, 7- test loops unit, 8- the first prefabricated cable terminals, the prefabricated cables of 9- second are whole
End, the GIS air chambers of 10- the first, the GIS air chambers of 11- the 2nd, 12-XLPE cables, 13- fundamental waves superposition multiple-harmonic control unit, 14- are defeated
Enter filtration module, 15- power models, 16- output filter modules, 17-PWM rectifier bridges, 18-PWM inverter bridges.
Embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the present invention is clearly and completely described,
Obviously, described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based in the present invention
Embodiment, the every other embodiment that those of ordinary skill in the art are obtained on the premise of creative work is not made,
Belong to the scope of protection of the invention.
As shown in figure 1, a kind of High Voltage XLPE Power Cable provided by the present invention and its annex fundamental wave superposition multiple-harmonic experiment dress
Put, including AC power 1, fundamental wave superposition multiple-harmonic generating unit 2, fundamental wave superposition multiple-harmonic control unit 13, intermediate transformer
3rd, compensation reactor 4, standard capacitance unit 5, voltage analysis instrument 6 and test loop unit 7；AC power 1, fundamental wave superposition are more
Harmonics generation unit 2, intermediate transformer 3, compensation reactor 4 and standard capacitance unit 5 are sequentially connected；Standard capacitance unit 5
Also it is connected respectively with voltage analysis instrument 6, test loop unit 7；Fundamental wave superposition multiple-harmonic control unit 13 is also divided with voltage respectively
Analyzer 6, fundamental wave superposition multiple-harmonic generating unit 2 connect.
As shown in figure 1, test loop unit 7 includes two 35kV prefabricated cables terminals, two GIS air chambers and 35kV
XLPE cable 12；Two 35kV prefabricated cable terminals are respectively that the first prefabricated cable terminal 8 and the second prefabricated cable are whole
End 9；Two GIS air chambers are respectively the first GIS air chambers 10 and the 2nd GIS air chambers 11；First prefabricated cable terminal 8 and second is pre-
The first GIS air chambers 10 and the 2nd GIS air chambers 11 are inserted in one end of standard cable terminal 9 respectively, and the other end is mutually interconnected by wire
Connect；First GIS air chambers 10 and the 2nd GIS air chambers 11 are connected with each other by 35kV XLPE cables 12.
As shown in Fig. 2 fundamental wave superposition multiple-harmonic generating unit 2 includes input filter module 14, the power mould being sequentially connected
Block 15 and output filter module 16；Power model 15 is made up of two back-to-back power cells by way of cascade, each
Back-to-back power cell include the PWM rectifier bridges 17, DC side storage capacitor and the PWM inverter bridges 18 that are sequentially connected；Often
Individual back-to-back power cell corresponds to an input filter module 14 respectively, the output ends of two input filter modules 14 respectively with
The input of PWM rectifier bridges 17 connection of two back-to-back power cells；PWM rectifier bridges 17, for establishing steady dc voltage,
PWM inverter bridges 18, for generating given voltage signal.The connected mode structure cascaded by two inverter sides of PWM inverter bridges 18
The main topological structure of success rate module 15, using monopole frequency multiplication phase-shifting carrier wave SPWM Technique, harmonic frequency is improved, really
Protect the accurate output of higher hamonic wave；While fundamental wave is exported, accurate control and the mould of superposition multi-frequency harmonic source are realized
Intend, improve harmonic wave bandwidth so that fundamental wave superposition multiple-harmonic experimental rig of the present invention can preferably meet high pressure XLPE electricity
Cable and its harmonic frequency requirement of annex fundamental wave superposition multiple-harmonic experiment.
As shown in Fig. 2 output filter module 16 and two input filter modules 14 use RLC filtering modes, L1、L2For
Input filter inductance, R1、R2For input filter resistance, C1、C2For input filter capacitor, CD1、CD2For DC side storage capacitor, L0
For output inductor, R0To export filter resistance, C0For output filter capacitor.
As shown in figure 3, fundamental wave superposition multiple-harmonic control unit 13 includes master controller and cell controller, master controller bag
Include by the RS485 master control DSP being connected and master control FPGA；Master control DSP and master control FPGA are superimposed by optical fiber with fundamental wave respectively
Multiple-harmonic generating unit 2 connects；Cell controller is superimposed multiple-harmonic generating unit 2 and master control FPGA with fundamental wave by optical fiber respectively
It is connected；Master control DSP is connected by RS422 four-wire interfaces with host computer, is folded for receiving instruction that host computer issues and fundamental wave
The upload of the information of harmonics generation unit 2 is added, while is additionally operable to system flow control, data processing, fundamental wave superposition multiple-harmonic hair
The raw major loop of unit 2 protection and the information exchange between master control FPGA；Master control FPGA, for realizing that system state amount is supervised
Survey, fundamental wave is superimposed the inversion control of multiple-harmonic generating unit 2 and its loop protection；Cell controller, for realize rectification control and
Information monitoring, and issue PWM rectifications and inversion control information.This control model of fundamental wave superposition multiple-harmonic control unit 13 is filled
Divide and make use of the advantages of DSP operation speed is fast and fpga logic processing is strong, realize the independent control of PWM rectifications and inversion, really
The accuracy and reliability of control logic are protected.
The iron core of intermediate transformer 3 is air-gap-free iron core made of banding non-crystalline material winding；Its winding is high-tension coil
With the coiling of low-voltage coil interval, and segmentation coiling is carried out using multiple-grooved skeleton winding, can meet that 50Hz~2500Hz energy passes
Pass, effectively reduce air gap leakage field and eddy-current loss；Fundamental wave is superimposed into multiple-harmonic generating unit 2 using electromagnetic induction principle to export
Fundamental wave superposition harmonic voltage be increased to the magnitude of voltage of setting, compensated reactor 4 acted on after compensating High Voltage XLPE Power Cable and
Its annex test loop unit 7, so as to realize the dielectric test of related test product.
High Voltage XLPE Power Cable and its annex fundamental wave the superposition multiple-harmonic experimental rig of the present invention：Fundamental wave superposition multiple-harmonic control
Unit 13 is superimposed multiple-harmonic generating unit 2 to fundamental wave and issues control instruction, and control fundamental wave superposition multiple-harmonic generating unit 2 is exporting
While fundamental wave, the accurate control and simulation of superposition multi-frequency harmonic source are realized；Fundamental wave is superimposed multi resonant by intermediate transformer 3
The fundamental wave superposition harmonic voltage that ripple generating unit 2 exports is increased to the magnitude of voltage of setting, and compensated reactor 4 acts on after compensating
Test loop unit 7, realize the dielectric test of cable and its annex；Standard capacitance unit 5 measures intermediate transformer 3 and exported
The relevant information of voltage, and transmit to voltage analysis instrument 6, voltage analysis instrument 6 and the voltage signal of input is analyzed and separated,
To obtain fundamental voltage amplitude and each harmonic voltage magnitude and content, and relevant information is fed back into fundamental wave superposition multiple-harmonic control
Unit 13 processed, so as to realize the closed-loop control and regulation of fundamental wave superposition multiple-harmonic test voltage；Fundamental voltage amplitude when output,
When each harmonic electric voltage frequency and content exceed the limit deviation of setting compared with input value, fundamental wave superposition multiple-harmonic control unit
13 it is automatic issue control instruction, the output voltage signals of regulation fundamental wave superposition multiple-harmonic generating unit 2, until output voltage with it is defeated
Enter value and compare the limit deviation less than setting.
Transmission, each harmonic voltage magnitude and its content while the present invention realizes fundamental wave superposition multiple-harmonic voltage signal
Accurate control, fundamental voltage the lower height of multi resonant wave voltage effect is superimposed with the overall-in-one control schema of multi resonant wave voltage with output, fundamental wave
Press the dielectric test of XLPE cable and its annex.In addition, fundamental wave is superimposed by the way of intermediate transformer 3 multiple-harmonic
Output voltage is increased to required magnitude of voltage, on the one hand improves the upper limit and capacity of experiment of output voltage, and voltage etc. can be achieved
The Insulation Test for the XLPE cable that level is higher, length is larger；On the other hand reduce and carried on the back in fundamental wave superposition multiple-harmonic generating unit 2
The cascade quantity of backrest power cell, significantly reduce monopole frequency multiplication only with the mode of two back-to-back cascade of power units and carry
The complexity of ripple phase shift SPWM Technique control logic, reduces that multiple have can for coordination between power cells back-to-back
Inconsistency caused by energy, improve the accuracy and reliability of fundamental wave superposition multiple-harmonic test voltage generation.
Above disclosed is only the embodiment of the present invention, but protection scope of the present invention is not limited thereto,
Any one skilled in the art the invention discloses technical scope in, can readily occur in change or modification, all
It should be included within the scope of the present invention.
Claims (9)
1. a kind of High Voltage XLPE Power Cable and its annex fundamental wave superposition multiple-harmonic experimental rig, it is characterised in that：Including AC power
（1）, fundamental wave superposition multiple-harmonic generating unit（2）, fundamental wave superposition multiple-harmonic control unit（13）, intermediate transformer（3）, compensation electricity
Anti- device（4）, standard capacitance unit（5）, voltage analysis instrument（6）And test loop unit（7）；The AC power（1）, fundamental wave
It is superimposed multiple-harmonic generating unit（2）, intermediate transformer（3）, compensation reactor（4）And standard capacitance unit（5）It is sequentially connected；
The standard capacitance unit（5）Also respectively with the voltage analysis instrument（6）, test loop unit（7）Connection；The fundamental wave superposition
Multiple-harmonic control unit（13）Also respectively with the voltage analysis instrument（6）, fundamental wave superposition multiple-harmonic generating unit（2）Connection.
2. High Voltage XLPE Power Cable as claimed in claim 1 and its annex fundamental wave superposition multiple-harmonic experimental rig, it is characterised in that：
The fundamental wave is superimposed multiple-harmonic generating unit（2）Including the input filter module being sequentially connected（14）, power model（15）And
Output filter module（16）；The power model（15）It is made up of two back-to-back power cells by way of cascade, each
Described back-to-back power cell includes the PWM rectifier bridges being sequentially connected（17）, DC side storage capacitor and PWM inverter bridges
（18）；Each described back-to-back power cell corresponds to an input filter module respectively（14）, two input filter modules
（14）Output end PWM rectifier bridges with two back-to-back power cells respectively（17）Input connects；The PWM rectifier bridges
（17）, for establishing steady dc voltage, the PWM inverter bridges（18）, for generating given voltage signal.
3. High Voltage XLPE Power Cable as claimed in claim 2 and its annex fundamental wave superposition multiple-harmonic experimental rig, it is characterised in that：
The output filter module（16）With two input filter modules（14）Use RLC filtering modes.
4. High Voltage XLPE Power Cable as claimed in claim 1 and its annex fundamental wave superposition multiple-harmonic experimental rig, it is characterised in that：
The fundamental wave is superimposed multiple-harmonic control unit（13）Including master controller and cell controller, the master controller includes being connected
Master control DSP and master control FPGA；The master control DSP and master control FPGA are superimposed multiple-harmonic generating unit with the fundamental wave respectively（2）
Connection；The cell controller is superimposed multiple-harmonic generating unit with the fundamental wave respectively（2）It is connected with master control FPGA；The master
Control DSP is connected with host computer, for receiving instruction and the fundamental wave superposition multiple-harmonic generating unit that host computer issues（2）Information it is upper
Pass, while be additionally operable to system flow control, data processing, fundamental wave superposition multiple-harmonic generating unit（2）Major loop protect and with
Information exchange between master control FPGA；The master control FPGA, for realizing that system state amount monitoring, fundamental wave are superimposed multiple-harmonic
Unit（2）Inversion control and its loop protection；The cell controller, for realizing rectification control and information monitoring, and issue
PWM rectifications and inversion control information.
5. High Voltage XLPE Power Cable as claimed in claim 4 and its annex fundamental wave superposition multiple-harmonic experimental rig, it is characterised in that：
The master control DSP is connected with master control FPGA by RS485.
6. High Voltage XLPE Power Cable as claimed in claim 4 and its annex fundamental wave superposition multiple-harmonic experimental rig, it is characterised in that：
The master control DSP and master control FPGA are superimposed multiple-harmonic generating unit by optical fiber with the fundamental wave respectively（2）Connection；The unit
Controller is superimposed multiple-harmonic generating unit with the fundamental wave respectively by optical fiber（2）It is connected with master control FPGA.
7. High Voltage XLPE Power Cable as claimed in claim 1 and its annex fundamental wave superposition multiple-harmonic experimental rig, it is characterised in that：
The master control DSP is connected by RS422 four-wire interfaces with host computer.
8. High Voltage XLPE Power Cable as claimed in claim 1 and its annex fundamental wave superposition multiple-harmonic experimental rig, it is characterised in that：
The intermediate transformer（3）Iron core for banding non-crystalline material winding made of air-gap-free iron core；Its winding be high-tension coil with
The coiling of low-voltage coil interval, and segmentation coiling is carried out using multiple-grooved skeleton winding.
9. High Voltage XLPE Power Cable as claimed in claim 1 and its annex fundamental wave superposition multiple-harmonic experimental rig, it is characterised in that：
The test loop unit（7）Including two prefabricated cable terminals, two GIS air chambers and XLPE cable（12）；Described two
Individual prefabricated cable terminal is respectively the first prefabricated cable terminal（8）With the second prefabricated cable terminal（9）；It is described two
GIS air chambers are respectively the first GIS air chambers（10）With the 2nd GIS air chambers（11）；The first prefabricated cable terminal（8）With second
Prefabricated cable terminal（9）One end insert the first GIS air chambers respectively（10）With the 2nd GIS air chambers（11）, the other end leads to
Cross wire interconnection；The first GIS air chambers（10）With the 2nd GIS air chambers（11）Pass through XLPE cable（12）It is connected with each other.
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| CN201711016291.3A CN107677943A (en) | 2017-10-25 | 2017-10-25 | A kind of High Voltage XLPE Power Cable and its annex fundamental wave superposition multiple-harmonic experimental rig |
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| CN201711016291.3A CN107677943A (en) | 2017-10-25 | 2017-10-25 | A kind of High Voltage XLPE Power Cable and its annex fundamental wave superposition multiple-harmonic experimental rig |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109061401A (en) * | 2018-11-02 | 2018-12-21 | 国网山西省电力公司电力科学研究院 | A kind of method for building up of electric cable stoppage assessment system |
| CN110061502A (en) * | 2019-04-24 | 2019-07-26 | 千黎（苏州）电源科技有限公司 | Multiple-harmonic injection control system and method |
| CN111983397A (en) * | 2020-07-20 | 2020-11-24 | 华中科技大学 | Insulating medium breakdown experiment device and method |
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