CN109298369A - Extra-high voltage direct-current transducer check platform - Google Patents
Extra-high voltage direct-current transducer check platform Download PDFInfo
- Publication number
- CN109298369A CN109298369A CN201811294613.5A CN201811294613A CN109298369A CN 109298369 A CN109298369 A CN 109298369A CN 201811294613 A CN201811294613 A CN 201811294613A CN 109298369 A CN109298369 A CN 109298369A
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- Prior art keywords
- extra
- high voltage
- voltage direct
- current
- pressure cylinder
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Classifications
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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
Abstract
The present invention relates to a kind of extra-high voltage direct-current transducer check platforms, including the extra-high voltage direct-current transformer checking system for being connected to form verification circuit with extra-high voltage direct-current mutual inductor to be verified, the power supply device for transporting extra-high voltage direct-current transformer checking system and building the mechanical device in verification circuit, be set on mechanical device and be used to power for extra-high voltage direct-current transformer checking system.Mechanical device include chassis, bottom end be hinged with chassis two times of pressure cylinders, for driving times pressure cylinder to rotate the drive system for converting it between vertical state and folded state relative to chassis, being set to times grading ring on pressure cylinder top, a part of extra-high voltage direct-current transformer checking system is set in times pressure cylinder, and another part is connected with a times pressure cylinder.The present invention is designed using unified platform, meets all working of extra-high voltage direct-current transducer check with can be convenient, and is suitable for laboratory and field-checking.
Description
Technical field
The invention belongs to electrical test equipment fields, and in particular to a kind of to be verified for extra-high voltage direct-current mutual inductor
Platform.
Background technique
Direct current instrument transformer is the important primary equipment in extra-high voltage DC transmission system, is provided for the control and protection of system
Accurate and reliable metrical information, operational reliability and measurement accuracy are directly related to the safety and stability fortune of DC transmission system
Row.Direct current instrument transformer is also the important sensing device for carrying out rectification with inversion working state control simultaneously, by measuring DC side
Electric energy, can calculate the energy efficiency of rectification and reversals, to judge the operating status and parameter of DC converter equipment
Whether reach design requirement, and adjusts operating parameter to optimize and achieve the purpose that the economical operation of equipment.
Direct current instrument transformer is during long-distance transport, site installation test and operating maintenance, it is understood that there may be equipment damage, mutually
Situations such as sensor ontology and improper secondary electron partial parameters matching, the measurement accuracy of direct current instrument transformer is caused to reduce, thus
Security risk is left for DC transmission system.It therefore, should be before putting into operation for the safety and stability economical operation of DC transmission system
Site error test is carried out to direct current instrument transformer with after operation.
Since the technical difficulty of extra-high voltage direct-current mutual inductor on site calibration test is big, it is high to require testing equipment, phase
Unit is closed when carrying out the test of DC voltage transformer field calibration, usually with simple machine under 10% voltage rating, to straight
The polarity and no-load voltage ratio for flowing voltage transformer are checked roughly.
In fact, the DC voltage transformer of hanging net operation is all made of electric resistance partial pressure principle measurement DC voltage at present.?
Under high voltage, influence of the resistance self-heating to accuracy of measurement can be more significant, only under high voltages, leakage current and electricity
Influence of the corona current to accuracy of measurement can just display, and therefore, only be calibrated in full voltage range, could be accurate
Judge whether the accuracy of measurement of DC voltage transformer meets the requirements.
It follows that the simple verification mode of existing extra-high voltage direct-current mutual inductor is difficult to meet the requirement accurately verified.
And according to large complicated testing equipment, then larger difficulty is also faced when testing equipment is built.
Summary of the invention
The object of the present invention is to provide one kind can fully meet extra-high voltage direct-current transducer check demand and easy to use
Extra-high voltage direct-current transducer check platform.
In order to achieve the above objectives, the technical solution adopted by the present invention is that:
A kind of extra-high voltage direct-current transducer check platform, for verifying extra-high voltage direct-current mutual inductor, the extra-high voltage direct-current mutual inductance
Device verification platform includes the extra-high straightening for being connected to form verification circuit with the extra-high voltage direct-current mutual inductor to be verified
Current transformer check system, for transport the extra-high voltage direct-current transformer checking system and build it is described verification circuit machinery
Device is set on the mechanical device and for the power supply device for extra-high voltage direct-current transformer checking system power supply.
The mechanical device include chassis, bottom end and the chassis be hinged two times of pressure cylinders, for driving described times
Pressure cylinder relative to the chassis rotate the drive system for converting it between vertical state and folded state, be set to it is described
The grading ring on times pressure cylinder top, a part of the extra-high voltage direct-current transformer checking system are set in times pressure cylinder, separately
It is a part of to be connected with described times of pressure cylinder.
The drive system includes bottom end and the chassis is hinged turning support is set to the turning support top
And it can hold or unclamp the manipulator of times pressure cylinder tightly, for driving the turning support to rotate and drive the manipulator to embrace
Power device that is tight or unclamping.
The power device includes for driving the main hydraulic cylinder of the turning support rotation, for driving the machinery
Mechanical hand hydraulic cylinder, the hydraulic for controlling the main hydraulic cylinder and the mechanical hand hydraulic cylinder that hand is held tightly or unclamped
Stand, the main hydraulic cylinder is connected with the chassis and the turning support respectively, the mechanical hand hydraulic cylinder respectively with institute
It states turning support to be connected with the manipulator, the hydraulic workstation is set on the chassis.
The transport that the turning support is supported when described times of pressure cylinder is in the folded state is provided on the chassis
Bracket.
The mechanical device further include be set on the chassis and when described times of pressure cylinder is in the vertical state by
The cushion block of times pressure cylinder described in supported underneath.
The support frame that times pressure cylinder is supported when described times of pressure cylinder is in the folded state is provided on the chassis.
The levelling foot for adjusting its levelness is provided on the chassis.
Described times of pressure cylinder bottom is provided with a times pressure cylinder chassis.
The power supply device includes intermediate-frequency transformer.
Due to the above technical solutions, the present invention has the following advantages over the prior art: the present invention is using one
Change Platform Designing, meet all working of extra-high voltage direct-current transducer check with can be convenient, is suitable for laboratory and live school
It tests.
Detailed description of the invention
Attached drawing 1 is that the extra-high voltage direct-current transformer checking system in the present invention carries out school to extra-high voltage direct-current voltage transformer
The circuit wiring diagram tested.
Attached drawing 2 is that the extra-high voltage direct-current transformer checking system in the present invention carries out school to extra high-voltage DC current transformer
The circuit wiring diagram tested.
Attached drawing 3 is the schematic front view that DC mutual inductor verification platform of the invention is in collapsed transportable state.
Attached drawing 4 is the schematic top plan view that DC mutual inductor verification platform of the invention is in collapsed transportable state.
Attached drawing 5 is the state schematic front view of DC mutual inductor verification platform of the invention in erection process.
Attached drawing 6 is the schematic front view of DC mutual inductor verification platform of the invention in a state of use.
In the figures above: 1, times pressure cylinder；2, turning support；3, manipulator；4, mechanical hand hydraulic cylinder；5, main hydraulic cylinder；
6, intermediate-frequency transformer；7, times pressure cylinder chassis；8, cushion block；9, levelling foot；10, transport support；11, hydraulic workstation；12, it presses
Ring；13, chassis；14, support frame.
Specific embodiment
The invention will be further described for embodiment shown in reference to the accompanying drawing.
Embodiment one: the maximum output voltage of extra-high voltage direct-current mutual inductor to be verified is not less than in the present embodiment
1300kV, design output-current rating are not less than 15mA, and output voltage stabilization degree is better than 0.03%/30s, and ripple factor is not higher than
0.1%, stream time is no less than 30min.
It is a kind of for verifying the DC mutual inductor verification platform of extra-high voltage direct-current mutual inductor, including extra-high voltage direct-current mutual inductor
Check system, mechanical device and power supply device.
Extra-high voltage direct-current transformer checking system is used to be connected to form verification with extra-high voltage direct-current mutual inductor to be verified
Circuit, to be verified.As shown in Figure 1 and Figure 2, extra-high voltage direct-current transformer checking system includes extra-high voltage standard straight
Galvanic electricity current transformer/extra-high voltage standard DC voltage transformer, extra-high voltage direct-current current feedback circuit/extra-high voltage direct-current voltage occur
Device and direct current tester.
Extra-high voltage standard DC current transformer/extra-high voltage standard DC voltage transformer (also referred to as extra-high voltage mark
Quasi- voltage divider) it include measurement resistor main body (i.e. divider resistance layer), the shielding resistance for being set to measurement electricity group body peripheral
Layer.Usually measurement resistor main body and shielding resistive layer constitutes concentric structure.Measuring resistor main body includes several electricity being connected
Resistance element, adjacent resistive element temperature coefficient is identical with the absolute value of voltage coefficient, opposite sign.The extra-high voltage standard straight
Ontology of the galvanic electricity current transformer/extra-high voltage standard DC voltage transformer using measuring resistance as measurement, when design, selection is warm
Degree coefficient is identical with voltage coefficient absolute value, opposite sign resistive element is adjacent, can reduce temperature coefficient to greatest extent
Influence with voltage coefficient to resistance actual resistance.To reduce under high voltages, leakage current and corona current are accurate to measuring
The influence of degree, design extra-high voltage standard DC current transformer/extra-high voltage standard DC voltage transformer are double concentric circle knot
Structure, wherein interior layer is measurement resistor main body, and exterior layer is shielding resistive layer, selects the resistance of shielding resistive layer for measurement
2 times of resistive layer resistance.Resistive layer is shielded to act on so that near divider resistance layer the equivalent potential screen of divider resistance layer
Transverse electric field component close to zero；Size is synthesized close to zero transverse electric field component and equally distributed longitudinal electric field component
The conjunction electric field being evenly distributed.
Extra-high voltage direct-current current feedback circuit/extra-high voltage direct-current voltage generator output current/voltage is according to needed for verification
Current/voltage and it is adjustable, for for extra-high voltage direct-current mutual inductor to be verified and extra-high voltage standard DC current transformer/
Extra-high voltage standard DC voltage transformer, which provides, verifies required DC current/voltage.Extra-high voltage direct-current mutual inductor to be verified and
Extra-high voltage standard DC current transformer/extra-high voltage standard DC voltage transformer be connected to extra-high voltage direct-current current feedback circuit/
The output end of extra-high voltage direct-current voltage generator.Extra-high voltage is used when carrying out electric current verification to extra high-voltage DC current transformer
Standard DC current transformer and extra-high voltage direct-current current feedback circuit, and extra-high voltage direct-current mutual inductor and extra-high voltage mark to be verified
Quasi- DC current transformer constitutes series loop；It carries out then using extra-high voltage standard DC voltage transformer and spy when voltage check
High-voltage dc voltage generator, extra-high voltage direct-current mutual inductor to be verified and extra-high voltage standard DC voltage transformer constitute in parallel
Circuit.Extra-high voltage direct-current current feedback circuit outputting current steadily degree is better than 2 × 10-4It/2 minutes, exports electric current accuracy: being better than
+ 0.005% × range of 0.02% × reading, 3 output voltages: DC 5V, current ripples coefficient :≤1%(I >=10%).
Direct current tester respectively with extra-high voltage direct-current mutual inductor to be verified and extra-high voltage standard DC current transformer/spy
High voltage standard DC voltage transformer is connected, for extra-high voltage direct-current mutual inductor to be verified and extra-high voltage standard direct current
Current transformer/extra-high voltage standard DC voltage transformer is measured and verified and output verification result.Direct current tester includes
The first measurement of the first measuring signal is exported after measuring for the output signal to extra-high voltage direct-current mutual inductor to be verified
Table, for being measured to extra-high voltage standard DC current transformer/extra-high voltage standard DC voltage transformer output signal
The second measurement table of the second measuring signal is exported afterwards, is connected respectively with the first measurement table and the second measurement table and is based on the first survey
Amount signal and the second measuring signal and obtain the check systems of check results.The direct current tester is that special high-precision band is synchronous
The multi-channel measurement instrument for measuring function, has the verifying function of the direct current instrument transformer of analog output and digital output.It should
Direct current tester can according to synchronization signal simultaneously measurement standard mutual inductor output signal and by the output signal of school mutual inductor, and
It is converted into the measurement output quantity of synchronization, provides corresponding check results by calculating.
Fig. 1 is that extra-high voltage direct-current voltage transformer verifies circuit wiring diagram, provides school by extra-high voltage direct-current voltage generator
Required extra-high voltage is tested, which exports to extra-high voltage standard DC voltage transformer and to be verified extra-high
The shunt circuit of DC voltage transformer is pressed, extra-high voltage standard DC voltage transformer and extra-high voltage direct-current voltage to be verified are mutual
High accuracy number measurement table (the first measurement table and the second measurement in the secondary low-voltage output signal access direct current tester of sensor
Table), after synchronizing measurement, the measurement result provided exports to check system and carries out error calculation and result comparison judgement,
So as to complete the verification of extra-high voltage direct-current voltage transformer.Fig. 2 is that extra high-voltage DC current transformer verifies circuit wiring diagram,
D.C. high-current required for verifying is provided by extra-high voltage direct-current current feedback circuit, which exports to extra-high voltage standard
The series loop of DC current transformer and extra high-voltage DC current transformer to be verified, extra-high voltage standard DC current mutual inductance
The high accuracy number of the secondary low-voltage output signal of device and extra high-voltage DC current transformer to be verified access direct current tester
Table is measured, after synchronizing measuring instrument, the measurement result provided exports to check system and carries out error calculation and result comparison
Determine, so as to complete the verification of extra-high voltage direct-current voltage transformer.
Power supply device is used to power for extra-high voltage direct-current transformer checking system, and intermediate-frequency transformer 6 is used in the present embodiment,
It is connected with extra-high voltage direct-current current feedback circuit/extra-high voltage direct-current voltage generator, direct current tester respectively.
Mechanical device is for transporting extra-high voltage direct-current transformer checking system and building verification circuit, therefore extra-high voltage direct-current is mutual
At least part and power supply device of sensor check system are arranged on mechanical device.
As shown in attached drawing 3 to attached drawing 6.Mechanical device includes 13, two times pressure cylinders 1, drive system, grading rings 12 of chassis.
Chassis 13 is substantially arranged on chassis 13 at a side of chassis 13 in tabular for carrying other components
There is the levelling foot 9 for adjusting its levelness.
Two times of pressure cylinders 1 are arranged parallel.Times pressure cylinder 1 is cylindrical, and bottom is provided with a times pressure cylinder chassis 7.Times pressure cylinder 1
Bottom, the i.e. side of times pressure cylinder chassis 7 are hinged with chassis 13, so that pressure cylinder 1 can be rotated relative to chassis 13 again.It drives
Dynamic system is used to that times pressure cylinder 1 to be driven to rotate relative to chassis 13, so that pressure cylinder 1 can be in vertical state and folded state again
Between convert.Under vertical state, the axis of times pressure cylinder 1 perpendicular to chassis 13 plane, and in a folded configuration, times pressure cylinder 1
Axis and chassis 13 be in a lesser acute angle so that the whole height of mechanical device reduces.Grading ring 12 is arranged again
The top of pressure cylinder 1 is simultaneously connected with pressure cylinder 1 again, and in the present embodiment, axial distribution setting two of edge times pressure cylinder 1 are connected equal
Pressure ring 12.
For extra-high voltage direct-current transformer checking system, part of it is arranged in pressure cylinder 1 again, and another part then can be with
It is connected with pressure cylinder 1 again.Specifically, extra-high voltage direct-current current feedback circuit/extra-high voltage direct-current voltage generator is disposed therein one
In a times of pressure cylinder 1, extra-high voltage standard DC current transformer/extra-high voltage standard DC voltage transformer is arranged in another multiplication of voltage
In cylinder 1, and connected with grading ring 12.And direct current tester then constitutes an external equipment, can be connected with pressure cylinder 1 again or
It disconnects.
Drive system includes turning support 2, mechanical axis and power device.Turning support 2 by several rod pieces combine connection and
At, bottom end also with chassis 13 to side that is hinged, and being located at times pressure cylinder 1.The top of turning support 2 is arranged in manipulator 3,
It can act and hold or unclamp times pressure cylinder 1 tightly.Power device is for driving the rotation of turning support 2, the holding of driving manipulator 3 or pine
It opens.In the present embodiment, power device uses hydraulic device comprising main hydraulic cylinder 5, mechanical hand hydraulic cylinder 4 and hydraulic
Stand 11.Main hydraulic cylinder 5 is for driving turning support 2 to rotate, and opposite chassis 13 is obliquely installed, and one end is fixedly connected on chassis
On 13, and the other end and turning support 2 are rotatablely connected, to turning support 2 can be driven to rotate when it stretches.Manipulator
Hydraulic cylinder 4 is mounted on the top of turning support 2 and is connected with manipulator 3, for driving manipulator 3 hold tightly or unclamp
Movement.Hydraulic workstation 11 is arranged on chassis 13, is connected respectively with main hydraulic cylinder 5 and mechanical hand hydraulic cylinder 4, thus
Control main hydraulic cylinder 5 and mechanical hand hydraulic cylinder 4.
In addition, mechanical device further includes with flowering structure: being provided with transport support 10 on chassis 13, which is used for
Turning support 2 is supported when pressure cylinder 1 again is in folded state.Cushion block 8 corresponding with times pressure cylinder 1, cushion block 8 are provided on chassis 13
For when pressure cylinder 1 is in a vertical state again by supported underneath times pressure cylinder 1.Support frame 14, support frame 14 are provided on chassis 13
For supporting times pressure cylinder 1 when pressure cylinder 1 again is in folded state.
As shown in attached drawing 3 and attached drawing 4, times pressure cylinder 1 is in folded state, can transport extra-high voltage direct-current mutual inductor school at this time
Check system.When reaching testing position, then need to build verification circuit, process is as follows: after chassis 13 is leveled with levelling foot 9,
Hydraulic workstation 11 works, and main hydraulic cylinder 5 stretches out and pushes turning support 2 that times pressure cylinder 1 and grading ring 12 is driven to rotate, until
Times vertical chassis 13 of pressure cylinder 1.At this point, the grading ring 12 at 1 top of pressure cylinder is in contact with extra-high voltage direct-current mutual inductor to be verified again
And connection is established, and 1 bottom of pressure cylinder is contacted with cushion block 8 again, and is supported by cushion block 8, can be further with bolt by times pressure cylinder bottom
Frame 7 and 8 fixation of cushion block, as shown in Fig. 5.Then, manipulator 3 unclamps times pressure cylinder under the drive of mechanical hand hydraulic cylinder 4
1, then again under the drive of main hydraulic cylinder 5, turning support 2 is rotated backward and is lied down to travel position, so that platform reaches
Use state, as shown in Fig. 6.At this point, direct current tester is connected to times pressure cylinder 1, can be verified.After the completion of verification,
Hydraulic workstation 11 works, and main hydraulic cylinder 5 pushes 2 to 90 ° of turning support, and turning support 2 is contacted with times pressure cylinder 1, manipulator 3
Times pressure cylinder 1 is held tightly again under the action of mechanical hand hydraulic cylinder 4.Then under the drive of main hydraulic cylinder 5, turning support 2 is driven
Times pressure cylinder 1 is rotated backward to the travel position lied down, at this point, pressure cylinder 1 is contacted with support frame 14 and propped up by support frame 14 again, is turned over
The frame 2 that asks then is supported by transport support 10.
The beneficial effect of above-mentioned DC mutual inductor verification platform is: 1, unified platform designs, and single equipment can meet
The all working of extra-high voltage direct-current transducer check；2, using building certainly and the mode of connection, without separately with lifting build equipment and
Extra-high voltage direct-current mutual inductor laboratory and field-checking work can be completed in test loop wiring.
The above embodiments merely illustrate the technical concept and features of the present invention, and its object is to allow person skilled in the art
Scholar cans understand the content of the present invention and implement it accordingly, and it is not intended to limit the scope of the present invention.It is all according to the present invention
Equivalent change or modification made by Spirit Essence, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of extra-high voltage direct-current transducer check platform, for verifying extra-high voltage direct-current mutual inductor, it is characterised in that: the spy
High voltage direct current transducer check platform includes verifying back for being connected to form with the extra-high voltage direct-current mutual inductor to be verified
The extra-high voltage direct-current transformer checking system on road, for transporting the extra-high voltage direct-current transformer checking system and building the school
The mechanical device in circuit is tested, is set on the mechanical device and for powering for the extra-high voltage direct-current transformer checking system
Power supply device.
2. extra-high voltage direct-current transducer check platform according to claim 1, it is characterised in that: the mechanical device includes
Two times of pressure cylinders that chassis, bottom end are hinged with the chassis, for drive times pressure cylinder relative to chassis rotation to
The drive system that converts it between vertical state and folded state, the grading ring for being set to times pressure cylinder top, it is described
A part of extra-high voltage direct-current transformer checking system is set in times pressure cylinder, and another part is connected with described times of pressure cylinder
It connects.
3. extra-high voltage direct-current transducer check platform according to claim 2, it is characterised in that: the drive system includes
Turning support that bottom end and the chassis are hinged is set to the turning support top and can hold or unclamp the multiplication of voltage tightly
The manipulator of cylinder, the power device for driving the turning support to rotate and drive the manipulator to hold tightly or unclamp.
4. extra-high voltage direct-current transducer check platform according to claim 3, it is characterised in that: the power device includes
For driving main hydraulic cylinder, the mechanical hand hydraulic for driving the manipulator to hold tightly or unclamp of the turning support rotation
Cylinder, the hydraulic workstation for controlling the main hydraulic cylinder and the mechanical hand hydraulic cylinder, the main hydraulic cylinder respectively with
The chassis is connected with the turning support, the mechanical hand hydraulic cylinder respectively with the turning support and the mechanical palmistry
Connection, the hydraulic workstation are set on the chassis.
5. extra-high voltage direct-current transducer check platform according to claim 3, it is characterised in that: be provided on the chassis
The transport support of the turning support is supported when described times of pressure cylinder is in the folded state.
6. extra-high voltage direct-current transducer check platform according to claim 2, it is characterised in that: the mechanical device also wraps
Include be set on the chassis and when described times of pressure cylinder is in the vertical state times pressure cylinder as described in supported underneath cushion block.
7. extra-high voltage direct-current transducer check platform according to claim 2, it is characterised in that: be provided on the chassis
The support frame of times pressure cylinder is supported when described times of pressure cylinder is in the folded state.
8. extra-high voltage direct-current transducer check platform according to claim 2, it is characterised in that: be provided on the chassis
Adjust the levelling foot of its levelness.
9. extra-high voltage direct-current transducer check platform according to claim 2, it is characterised in that: described times of pressure cylinder bottom is set
It is equipped with a times pressure cylinder chassis.
10. extra-high voltage direct-current transducer check platform according to claim 1, it is characterised in that: the power supply device packet
Include intermediate-frequency transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811294613.5A CN109298369A (en) | 2018-11-01 | 2018-11-01 | Extra-high voltage direct-current transducer check platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811294613.5A CN109298369A (en) | 2018-11-01 | 2018-11-01 | Extra-high voltage direct-current transducer check platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109298369A true CN109298369A (en) | 2019-02-01 |
Family
ID=65145408
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811294613.5A Pending CN109298369A (en) | 2018-11-01 | 2018-11-01 | Extra-high voltage direct-current transducer check platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109298369A (en) |
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| CN111362168A (en) * | 2020-03-16 | 2020-07-03 | 国网江苏省电力有限公司营销服务中心 | Lodging type device for overturning extra-high voltage direct current transformer calibration equipment |
| CN112485530A (en) * | 2020-11-26 | 2021-03-12 | 云南电网有限责任公司电力科学研究院 | System and method for testing resistance value of high-voltage arm of direct-current voltage transformer |
| CN112526299A (en) * | 2020-11-23 | 2021-03-19 | 国网湖北省电力有限公司电力科学研究院 | Mobile +/-800 kV direct-current withstand voltage test platform and using method thereof |
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| CN112485530A (en) * | 2020-11-26 | 2021-03-12 | 云南电网有限责任公司电力科学研究院 | System and method for testing resistance value of high-voltage arm of direct-current voltage transformer |
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Inventor after: Jiang Xinghui Inventor after: Zhao Yonggang Inventor after: Tong Bin Inventor after: Xu Lingjie Inventor after: Lv Jifan Inventor after: Chen Xiao Inventor after: Guo Peng Inventor after: Zhang Weihua Inventor after: Zhang Jiangming Inventor before: Jiang Xinghui Inventor before: Zhao Yonggang Inventor before: Tong Bin |