CN207516492U - XLPE cable and its attachment Multi-harmonic Sources insulation test device are pressed in one kind - Google Patents
XLPE cable and its attachment Multi-harmonic Sources insulation test device are pressed in one kind Download PDFInfo
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- CN207516492U CN207516492U CN201721386667.5U CN201721386667U CN207516492U CN 207516492 U CN207516492 U CN 207516492U CN 201721386667 U CN201721386667 U CN 201721386667U CN 207516492 U CN207516492 U CN 207516492U
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Abstract
The utility model discloses XLPE cable and its attachment Multi-harmonic Sources insulation test device is pressed in one kind, it is related to power cable detection technique field.Medium pressure XLPE cable and its attachment Multi-harmonic Sources insulation test device, including AC power, Multi-harmonic Sources generating unit, multiple-harmonic control unit, standard capacitance unit, harmonic analysis instrument and test loop unit, Multi-harmonic Sources generating unit is controlled to export the harmonic voltage that multi-frequency is superimposed simultaneously by multiple-harmonic control unit, and act on test loop, the monitoring and analysis of output harmonic wave voltage are realized, so as to fulfill middle pressure XLPE cable and its attachment insulation characterisitic experiment under the effect of a variety of harmonic superpositions simultaneously；The utility model realizes the independent control of PWM rectifications and inversion by multiple-harmonic control unit, it is ensured that the accuracy and reliability of control logic realizes the accurate control and simulation of overtone order and amplitude.
Description
Technical field
The utility model, which belongs in power cable detection technique field more particularly to one kind, presses XLPE cable and its attachment more
Harmonic source insulation test device.
Background technology
In recent years, with the rapid development of electric power network technique, diversification power demand continues to increase, intermittent distribution energy
A large amount of accesses in source, the complexity for leading to user side equipment is higher and higher, and mains by harmonics problem becomes getting worse.At present, city
Exist largely in the middle pressure XLPE cable and its attachment of fortune in city's power distribution network and ferroelectric tractive power supply system, and cable termination thing
Therefore it is the main reason for leading to cable run trip accident, and the influence that Multi-harmonic Sources deteriorate cable terminal insulation is extremely bright
It is aobvious.It was verified that pressing XLPE cable terminal in some tradition, aging significantly aggravates, the service life contracts significantly under multiple-harmonic effect
It is short, even result in the generation of insulation fault.
Based on this, the utility model proposes XLPE cable and its attachment Multi-harmonic Sources insulation test device is pressed in one kind, use
In the dielectric test of middle pressure XLPE cable and its attachment, can simulate simultaneously a variety of harmonic characterisitic centerings pressure XLPE cables and its
The accurate control and simulation of overtone order and amplitude are realized in the influence of attachment.
Utility model content
In view of the deficiencies of the prior art, the utility model provides pressure XLPE cable and its insulation of attachment Multi-harmonic Sources in one kind
Experimental rig.
The utility model is to solve above-mentioned technical problem by the following technical solutions：In one kind press XLPE cable and
Its attachment Multi-harmonic Sources insulation test device, including AC power, Multi-harmonic Sources generating unit, multiple-harmonic control unit, standard
Capacitor cell, harmonic analysis instrument and test loop unit；The Multi-harmonic Sources generating unit respectively with AC power, multiple-harmonic
Control unit and the connection of standard capacitance unit；The standard capacitance unit controls respectively with the harmonic analysis instrument, multiple-harmonic
Unit and the connection of test loop unit；The Multi-harmonic Sources generating unit, for accurate output multi-frequency superposition simultaneously
Harmonic voltage；The multiple-harmonic control unit is used to implement Multi-harmonic Sources generating unit output harmonic wave electric voltage frequency and amplitude
Accurate control；The standard capacitance unit, is used to implement the measurement of output harmonic wave voltage；The harmonic analysis instrument, is used to implement
The monitoring and analysis of output harmonic wave voltage；The test loop unit, for providing test loop；
The test loop unit includes two cold-contraction type cable terminations, two GIS gas chambers and XLPE cable；Described two
A cold-contraction type cable termination is respectively the first cold-contraction type cable termination and the second cold-contraction type cable termination；Described two GIS gas chambers
Respectively the first GIS gas chambers and the 2nd GIS gas chambers；The one of the first cold-contraction type cable termination and the second cold-contraction type cable termination
The first GIS gas chambers are inserted at end respectively and the 2nd GIS gas chambers, the other end are connected with each other by conducting wire；The first GIS gas chambers
It is connected with each other with the 2nd GIS gas chambers by XLPE cable.
Further, the Multi-harmonic Sources generating unit includes sequentially connected input filter module, harmonic power module
And output filter module；The harmonic power module is made up of multiple back-to-back power cells cascade mode, each
The back-to-back power cell includes sequentially connected PWM rectifier bridges, DC side storage capacitor and PWM inverter bridges；Often
A back-to-back power cell corresponds to an input filter module respectively, the output terminal of multiple input filter module respectively with
The PWM rectifier bridges input terminal connection of multiple back-to-back power cells；The PWM rectifier bridges, for establishing steady dc voltage,
The PWM inverter bridges, for generating given voltage signal.Pass through the cascade connection mode structure of multiple PWM inverter bridges inverter sides
Into the main topological structure of harmonic power module, using monopole frequency multiplication phase-shifting carrier wave SPWM Technique, harmonic wave is greatly improved
Frequency, it is ensured that the accurate output of higher hamonic wave；While the utility model installed capacity is improved, multi-frequency harmonic wave is realized
The accurate control and simulation in source, so as to effectively improve the harmonic wave bandwidth of whole device so that the utility model Multi-harmonic Sources
Pressure XLPE cable and its capacity and frequency requirement of the experiment of attachment Multi-harmonic Sources during experimental rig preferably meets.
Further, the output filter module and multiple input filter module use RLC filtering modes.
Further, the multiple-harmonic control unit includes master controller and cell controller, and the master controller includes
The master control DSP and master control FPGA being connected；The master control DSP and master control FPGA connects respectively with the Multi-harmonic Sources generating unit
It connects；The cell controller is connected respectively with the Multi-harmonic Sources generating unit and master control FPGA；The master control DSP with it is upper
Machine connects, and for receiving the upload of instruction that host computer issues and Multi-harmonic Sources generating unit information, while is additionally operable to system stream
Process control, data processing, the protection of Multi-harmonic Sources generating unit major loop and the information exchange between master control FPGA；The master
FPGA is controlled, is used to implement system state amount monitoring, multiple-harmonic generating unit inversion control and its loop protection；The unit control
Device is used to implement rectification control and information monitoring, and issues PWM rectifications and inversion control information.Multiple-harmonic control unit this
Kind of control model takes full advantage of DSP operation speed soon and fpga logic handles the advantages of strong, realizes PWM rectifications and inversion
Independent control, it is ensured that the accuracy and reliability of control logic.
Further, the master control DSP is connected with master control FPGA by RS485.
Further, the master control DSP and master control FPGA is connect respectively by optical fiber with the Multi-harmonic Sources generating unit；
The cell controller is connected by optical fiber with the Multi-harmonic Sources generating unit and master control FPGA respectively.
Further, the master control DSP is connect by RS422 four-wire interfaces with host computer.
Compared with prior art, middle pressure XLPE cable provided by the utility model and its attachment Multi-harmonic Sources Insulation Test
Device, including AC power, Multi-harmonic Sources generating unit, multiple-harmonic control unit, standard capacitance unit, harmonic analysis instrument and
Test loop unit controls Multi-harmonic Sources generating unit to export the harmonic wave that multi-frequency is superimposed simultaneously by multiple-harmonic control unit
Voltage, and act on test loop realizes the monitoring and analysis of output harmonic wave voltage, so as to fulfill middle pressure XLPE cable and its attached
The part insulation characterisitic experiment under the effect of a variety of harmonic superpositions simultaneously；The utility model realizes PWM by multiple-harmonic control unit
Rectification and the independent control of inversion, it is ensured that the accuracy and reliability of control logic realizes the accurate control of overtone order and amplitude
System and simulation.
Description of the drawings
It, below will be to needed in embodiment description in order to illustrate more clearly of the technical solution of the utility model
Attached drawing is briefly described, it should be apparent that, the accompanying drawings in the following description is only one embodiment of the utility model, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.
Fig. 1 is the structural representation of a kind of middle pressure XLPE cable of the utility model and its attachment Multi-harmonic Sources insulation test device
Figure；
Fig. 2 is the structure diagram of the utility model Multi-harmonic Sources generating unit major loop；
Fig. 3 is the functional block diagram of the utility model multiple-harmonic control unit；
Wherein：1- AC powers, 2- Multi-harmonic Sources generating units, 3- standard capacitance units, 4- harmonic analysis instruments, 5- experiments
Circuit units, 6- the first cold-contraction type cable terminations, 7- the second cold-contraction type cable terminations, the first GIS gas chambers of 8-, the 2nd GIS gas of 9-
Room, 10-XLPE cables, 11- multiple-harmonic control units, 12- input filter modules, 13- harmonic power modules, 14- output filtering
Module, 15-PWM rectifier bridges, 16-PWM inverter bridges.
Specific embodiment
With reference to the attached drawing in the utility model embodiment, the technical solution in the utility model is carried out clear, complete
Site preparation describes, it is clear that the described embodiments are only a part of the embodiments of the utility model, instead of all the embodiments.
Based on the embodiment in the utility model, those of ordinary skill in the art are obtained under the premise of creative work is not made
Every other embodiment, shall fall within the protection scope of the present invention.
As shown in Figure 1, pressure XLPE cable and its attachment Multi-harmonic Sources Insulation Test in one kind provided by the utility model
Device, including AC power 1, Multi-harmonic Sources generating unit 2, multiple-harmonic control unit 11, standard capacitance unit 3, frequency analysis
Instrument 4 and test loop unit 5；Multi-harmonic Sources generating unit 2 respectively with AC power 1, multiple-harmonic control unit 11 and mark
Pseudo-capacitance unit 3 connects；Standard capacitance unit 3 is single with harmonic analysis instrument 4, multiple-harmonic control unit 11 and test loop respectively
Member 5 connects；Multi-harmonic Sources generating unit 2, for the harmonic voltage of accurate output multi-frequency superposition simultaneously；Multiple-harmonic control is single
Member 11, is used to implement the accurate control of 2 output harmonic wave electric voltage frequency of Multi-harmonic Sources generating unit and amplitude；Standard capacitance unit 3,
It is used to implement the measurement of output harmonic wave voltage；Harmonic analysis instrument 4 is used to implement the monitoring and analysis of output harmonic wave voltage；Experiment
Circuit units 5, for providing test loop.
As shown in Figure 1, test loop unit 5 includes two 35kV cold-contraction types cable terminations, two GIS gas chambers and 35kV
XLPE cable 10；Two 35kV cold-contraction type cable terminations are respectively that the first cold-contraction type cable termination 6 and the second cold-contraction type cable are whole
End 7；Two GIS gas chambers are respectively the first GIS gas chambers 8 and the 2nd GIS gas chambers 9；First cold-contraction type cable termination 6 and the second shrinkage
The first GIS gas chambers 8 and the 2nd GIS gas chambers 9 are inserted into one end of formula cable termination 7 respectively, and the other end is connected with each other by conducting wire；The
One GIS gas chambers 8 and the 2nd GIS gas chambers 9 are connected with each other by 35kV XLPE cables 10.
As shown in Fig. 2, Multi-harmonic Sources generating unit 2 includes sequentially connected input filter module 12, harmonic power module
13 and output filter module 14；Harmonic power module 13 is made up of multiple back-to-back power cells cascade mode, often
A back-to-back power cell includes sequentially connected PWM rectifier bridges 15, DC side storage capacitor and PWM inverter bridges 16；
Each back-to-back power cell corresponds to an input filter module 12, the output terminal difference of multiple input filter module 12 respectively
It is connect with 15 input terminal of PWM rectifier bridges of multiple back-to-back power cells；PWM rectifier bridges 15, for establishing stable DC
Pressure, PWM inverter bridges 16, for generating given voltage signal.Pass through the cascade connection mode of multiple 16 inverter sides of PWM inverter bridges
The main topological structure of harmonic power module 13 is formed, using monopole frequency multiplication phase-shifting carrier wave SPWM Technique, is greatly improved
Harmonic frequency, it is ensured that the accurate output of higher hamonic wave；While the utility model installed capacity is improved, multi-frequency is realized
The accurate control and simulation of harmonic source, so as to effectively improve the harmonic wave bandwidth of whole device so that the utility model multi resonant
Pressure XLPE cable and its capacity and frequency requirement of the experiment of attachment Multi-harmonic Sources during wave source experimental rig preferably meets.
As shown in Fig. 2, output filter module 14 and multiple input filter module 12 use RLC filtering modes,
L1···LNFor input filter inductance, R1···RNFor input filter resistance, C1···CNFor input filter capacitor,
CD1···CDNFor DC side storage capacitor, L0For output inductor, R0To export filter resistance, C0To export filtered electrical
Hold.
As shown in figure 3, multiple-harmonic control unit 11 includes master controller and cell controller, master controller includes passing through
The master control DSP and master control FPGA that RS485 is connected；Master control DSP and master control FPGA is occurred single by optical fiber and Multi-harmonic Sources respectively
Member 2 connects；Cell controller is connected by optical fiber with Multi-harmonic Sources generating unit 2 and master control FPGA respectively；Master control DSP passes through
RS422 four-wire interfaces are connect with host computer, for receiving 2 information of instruction and Multi-harmonic Sources generating unit that host computer issues
Pass, at the same be additionally operable to system flow control, data processing, 2 major loop of Multi-harmonic Sources generating unit protection and with master control FPGA
Between information exchange；Master control FPGA is used to implement system state amount monitoring, multiple-harmonic generating unit inversion control and its circuit
Protection；Cell controller is used to implement rectification control and information monitoring, and issues PWM rectifications and inversion control information.Multiple-harmonic
This control model of control unit 11 takes full advantage of the advantages of DSP operation speed is fast and fpga logic processing is strong, realizes
PWM rectifications and the independent control of inversion, it is ensured that the accuracy and reliability of control logic.
The operation principle of XLPE cable and its attachment Multi-harmonic Sources insulation test device is pressed in the utility model：Multiple-harmonic control
Unit 11 processed issues harmonic wave generation and control instruction to Multi-harmonic Sources generating unit 2, and Multi-harmonic Sources generating unit 2 presses instruction simultaneously
The harmonic voltage of multi-frequency superposition is exported, and acts on test loop unit 5；Standard capacitance unit 3 measures multiple-harmonic in real time
On the one hand measured value is fed back to multiple-harmonic control unit 11 to realize Multi-harmonic Sources by the output harmonic wave voltage of source generating unit 2
On the other hand measured value is delivered to harmonic analysis instrument 4 to realize by the closed-loop control and adjusting of 2 output harmonic wave voltage of generating unit
The monitoring and analysis of output harmonic wave voltage；Press XLPE cable and its attachment simultaneously under the effect of a variety of harmonic superpositions in final realization
Insulation characterisitic experiment.
The cascade back-to-back power cell quantity of harmonic power module 13 in Multi-harmonic Sources generating unit 2 is more, then originally
The device output capacity of utility model is bigger, and output voltage is higher.The present embodiment is using 10 back-to-back cascade of power units
Mode generates the harmonic voltage disturbance of 35kV network systems, input filter inductance L to simulate1~L10Value is 0.4mH, input filter
Wave resistance R1~R10Value is 0.7 Ω, input filter capacitor C1~C10Value is 15 μ F, output inductor L0Value is 0.5mH,
Export filter resistance R0Value is 0.8 Ω, output filter capacitor C0Value is 20 μ F, DC side storage capacitor CD1~CD10Value is
6500μF；Output harmonic wave voltage magnitude is up to 4kV, by the output harmonic wave number and width that change Multi-harmonic Sources generating unit 2
The final output voltage of the i.e. adjustable Multi-harmonic Sources experimental rig of value.
Above disclosed is only specific embodiment of the present utility model, but the scope of protection of the utility model not office
It is limited to this, in the technical scope that any one skilled in the art discloses in the utility model, change can be readily occurred in
Change or modification, should be covered within the scope of the utility model.
Claims (9)
1. XLPE cable and its attachment Multi-harmonic Sources insulation test device are pressed in one kind, it is characterised in that：Including AC power
（1）, Multi-harmonic Sources generating unit（2）, multiple-harmonic control unit（11）, standard capacitance unit（3）, harmonic analysis instrument（4）And
Test loop unit（5）；The Multi-harmonic Sources generating unit（2）Respectively with AC power（1）, multiple-harmonic control unit（11）With
And standard capacitance unit（3）Connection；The standard capacitance unit（3）Respectively with the harmonic analysis instrument（4）, multiple-harmonic control it is single
Member（11）And test loop unit（5）Connection；The Multi-harmonic Sources generating unit（2）, for accurately exporting a variety of frequencies simultaneously
The harmonic voltage of rate superposition；The multiple-harmonic control unit（11）, it is used to implement Multi-harmonic Sources generating unit（2）Output harmonic wave electricity
The accurate control of voltage-frequency rate and amplitude；The standard capacitance unit（3）, it is used to implement the measurement of output harmonic wave voltage；It is described humorous
Wavelength-division analyzer（4）, it is used to implement the monitoring and analysis of output harmonic wave voltage；The test loop unit（5）, for providing experiment
Circuit；
The test loop unit（5）Including two cold-contraction type cable terminations, two GIS gas chambers and XLPE cable；Described two
A cold-contraction type cable termination is respectively the first cold-contraction type cable termination（6）With the second cold-contraction type cable termination（7）；It is described two
GIS gas chambers are respectively the first GIS gas chambers（8）With the 2nd GIS gas chambers（9）；The first cold-contraction type cable termination（6）It is cold with second
Contracting formula cable termination（7）One end be inserted into the first GIS gas chambers respectively（8）With the 2nd GIS gas chambers（9）, the other end is by leading
Line is connected with each other；The first GIS gas chambers（8）With the 2nd GIS gas chambers（9）Pass through XLPE cable（10）It is connected with each other.
2. pressure XLPE cable and its attachment Multi-harmonic Sources insulation test device in as described in claim 1, it is characterised in that：Institute
State Multi-harmonic Sources generating unit（2）Including sequentially connected input filter module（12）, harmonic power module（13）And output
Filter module（14）；The harmonic power module（13）It is made up of multiple back-to-back power cells cascade mode, each
The back-to-back power cell includes sequentially connected PWM rectifier bridges（15）, DC side storage capacitor and PWM inverter bridges
（16）；Each back-to-back power cell corresponds to an input filter module respectively（12）, multiple input filter module
（12）Output terminal PWM rectifier bridges with multiple back-to-back power cells respectively（15）Input terminal connects；The PWM rectifier bridges
（15）, for establishing steady dc voltage, the PWM inverter bridges（16）, for generating given voltage signal.
3. pressure XLPE cable and its attachment Multi-harmonic Sources insulation test device in as claimed in claim 2, it is characterised in that：Institute
State output filter module（14）With multiple input filter module（12）Use RLC filtering modes.
4. pressure XLPE cable and its attachment Multi-harmonic Sources insulation test device in as claimed in claim 3, it is characterised in that：Institute
State input filter module（12）Input filter inductance for 0.4mH, input filter resistance is 0.7 Ω, and input filter capacitor is 15 μ
F。
5. pressure XLPE cable and its attachment Multi-harmonic Sources insulation test device in as claimed in claim 3, it is characterised in that：Institute
State output filter module（14）Output inductor for 0.5mH, output filter resistance is 0.8 Ω, and output filter capacitor is 20 μ
F。
6. pressure XLPE cable and its attachment Multi-harmonic Sources insulation test device in as described in claim 1, it is characterised in that：Institute
State multiple-harmonic control unit（11）Including master controller and cell controller, the master controller includes the master control DSP being connected
With master control FPGA；The master control DSP and master control FPGA respectively with the Multi-harmonic Sources generating unit（2）Connection；The unit control
Device processed respectively with the Multi-harmonic Sources generating unit（2）It is connected with master control FPGA；The master control DSP is connect with host computer, is used
In receiving the instruction that issues of host computer and Multi-harmonic Sources generating unit（2）The upload of information, at the same be additionally operable to system flow control,
Data processing, Multi-harmonic Sources generating unit（2）Major loop is protected and the information exchange between master control FPGA；The master control
FPGA is used to implement system state amount monitoring, multiple-harmonic generating unit inversion control and its loop protection；The unit control
Device is used to implement rectification control and information monitoring, and issues PWM rectifications and inversion control information.
7. pressure XLPE cable and its attachment Multi-harmonic Sources insulation test device in as claimed in claim 6, it is characterised in that：Institute
Master control DSP is stated with master control FPGA by RS485 to be connected.
8. pressure XLPE cable and its attachment Multi-harmonic Sources insulation test device in as claimed in claim 6, it is characterised in that：Institute
Master control DSP and master control FPGA are stated respectively by optical fiber and the Multi-harmonic Sources generating unit（2）Connection；The cell controller leads to
Cross optical fiber respectively with the Multi-harmonic Sources generating unit（2）It is connected with master control FPGA.
9. pressure XLPE cable and its attachment Multi-harmonic Sources insulation test device in as claimed in claim 6, it is characterised in that：Institute
Master control DSP is stated to connect with host computer by RS422 four-wire interfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721386667.5U CN207516492U (en) | 2017-10-25 | 2017-10-25 | XLPE cable and its attachment Multi-harmonic Sources insulation test device are pressed in one kind |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721386667.5U CN207516492U (en) | 2017-10-25 | 2017-10-25 | XLPE cable and its attachment Multi-harmonic Sources insulation test device are pressed in one kind |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207516492U true CN207516492U (en) | 2018-06-19 |
Family
ID=62534948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721386667.5U Active CN207516492U (en) | 2017-10-25 | 2017-10-25 | XLPE cable and its attachment Multi-harmonic Sources insulation test device are pressed in one kind |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207516492U (en) |
Cited By (1)
| 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 |
-
2017
- 2017-10-25 CN CN201721386667.5U patent/CN207516492U/en active Active
Cited By (1)
| 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 |
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