CN107748345A - A kind of HVDC divider second divided voltage board parameter calibration equipment and method - Google Patents
A kind of HVDC divider second divided voltage board parameter calibration equipment and method Download PDFInfo
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- CN107748345A CN107748345A CN201711092643.3A CN201711092643A CN107748345A CN 107748345 A CN107748345 A CN 107748345A CN 201711092643 A CN201711092643 A CN 201711092643A CN 107748345 A CN107748345 A CN 107748345A
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- General Physics & Mathematics (AREA)
- Transformers For Measuring Instruments (AREA)
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Abstract
A kind of HVDC divider second divided voltage board parameter calibration equipment, including the DC constant voltage source for producing DC voltage needed for verification, for measuring the first current transformer of described DC constant voltage source output current, for measuring the second current transformer of second divided voltage plate input current, for measuring the first voltage transformer of DC voltage between second divided voltage plate input terminal, the first variable resistor for the low-voltage arm resistance of Equivalent DC divider, for measuring the second voltage transformer of DC voltage between second divided voltage plate lead-out terminal, for measuring the 3rd current transformer of second divided voltage plate output current, the second adjustable resistance for the optical-electric module internal resistance of Equivalent DC divider.Advantage is, can correctly second divided voltage plate input and output resistance, no-load voltage ratio under analog DC divider physical cabling mode, be advantageous to verify second divided voltage plate characterisitic parameter, find second divided voltage board defect in time, there is great economic benefit.
Description
Technical field
The present invention relates to straight-flow system voltage measurement field, more particularly to a kind of parameter of divider second divided voltage plate
Verification.
Background technology
Divider is important in the ultra-high voltage converter station and voltage monitoring equipment of core, and its function is to realize current conversion station
The real-time monitoring of DC voltage, and monitoring result is fed back into DC control system, it influences and determined the control of DC engineering
Preservation tactics processed and the method for operation.Divider once breaks down, and gently then causes straight-flow system monopole locking, heavy then cause
Whole DC transmission system is stopped transport, and by the operation risk for dramatically increasing power network and may bring huge economic loss.
Divider generally comprises body, second divided voltage plate and photoelectric conversion module.Body is by height pressure arm resistance, electricity
Hold composition, be packaged in SF6 dielectrics, the probability of failure is relatively low, and second divided voltage plate and photoelectric conversion module are general
In terminal box, influenceed by live weather, mechanical shock, it is easy to sealing-off, broken string of electronic component etc. occurs and asks
Topic, once problem above occurs, the no-load voltage ratio for making divider is changed, cause DC voltage measurement inaccurate, may
Cause protection misoperation.
The parameter verification of divider typically separates body with partial pressure plate at present, independent measurement height pressure arm resistance,
Second divided voltage plate input and output resistance, has differences with delivery test method, causes test result without comparison, can not accurate judgement
Whether the parameter of second divided voltage plate meets the requirements.Therefore it is necessary that research and development are a kind of and is used to examine divider second divided voltage board parameter
Device.
The content of the invention
Can not integrally it be verified instant invention overcomes divider second divided voltage plate in the case where disassembling
Defect, there is provided a kind of analog DC divider physical cabling mode verifies the test device of second divided voltage board parameter.
The present invention is achieved through the following technical solutions：
A kind of HVDC divider second divided voltage board parameter calibration equipment, described second divided voltage plate are used for direct current point
The low-voltage arm both end voltage of depressor carries out secondary no-load voltage ratio, and described calibration equipment includes being used to produce DC voltage needed for verification
DC constant voltage source, for measuring the first current transformer of described DC constant voltage source output current, for measuring second divided voltage
Second current transformer of plate input current, for measuring the first voltage mutual inductance of DC voltage between second divided voltage plate input terminal
Device, for the first variable resistor of the low-voltage arm resistance of Equivalent DC divider, for measuring between second divided voltage plate lead-out terminal
The second voltage transformer of DC voltage, for measuring the 3rd current transformer of second divided voltage plate output current, for equivalent
The second adjustable resistance of the optical-electric module internal resistance of divider.
As the improvement of such scheme, in addition to the first controlling switch K1, the second controlling switch K2, the 3rd control is controlled to open
Close K3；With two after described DC constant voltage source, the first controlling switch K1, the first current transformer, the series connection of the second current transformer
Individual described input terminal is in parallel, the first described variable resistor connected with the second controlling switch K2 after with DC constant voltage source, the
One controlling switch K1, the first current transformer are in parallel；Described first voltage transformer is in parallel with the input terminal described in two；
After described the second adjustable resistance, the 3rd controlling switch K3, the series connection of the 3rd current transformer with the lead-out terminal described in two simultaneously
Connection, described second voltage transformer are in parallel with the lead-out terminal described in two.
As the improvement of such scheme, the resistance value scope of the first variable resistor is 10K Ω to 10M Ω, and second can power transformation
The resistance value scope of resistance is 100k Ω to 1M Ω.
A kind of HVDC divider second divided voltage board parameter method of calibration, described second divided voltage plate are used for direct current point
The low-voltage arm both end voltage of depressor carries out secondary no-load voltage ratio, including for producing the DC constant voltage source of DC voltage needed for verification, uses
In the first current transformer of the described DC constant voltage source output current of measurement, for measuring the of second divided voltage plate input current
Two current transformers, for measuring the first voltage transformer of DC voltage between second divided voltage plate input terminal, for equivalent straight
First variable resistor of the low-voltage arm resistance of flow point depressor, for measuring second of DC voltage between second divided voltage plate lead-out terminal
Voltage transformer, for measuring the 3rd current transformer of second divided voltage plate output current, the light for Equivalent DC divider
The second adjustable resistance of electric module internal resistance, it is comprised the following steps that：
Step 1, the low-voltage arm actual resistance R according to HVDC dividerLow-voltage arm, adjust the first variable resistor R1=
RLow-voltage arm；
Step 2, the photoelectric conversion module quantity accessed according to second divided voltage plate and internal resistance RInternal resistance, adjust the second adjustable resistance
Access quantity, and adjust the second adjustable resistance R2=RInternal resistance；
Step 3, slowly rise DC constant voltage source voltage, make first voltage transformer registration UinIt is specified defeated with second divided voltage plate
It is equal to enter voltage；Read the first current transformer electric current registration Iin, the second current transformer electric current registration I2；Read second voltage
The voltage readings U of transformerout, the 3rd current transformer electric current registration Iout；
Step 4, the input resistance R for extracting second divided voltage plateinWith output resistance Rout：
Step 5, the no-load voltage ratio k for extracting second divided voltage plate：
Step 6, the reliability for judging HVDC divider second divided voltage plate, decision method are：When meeting following condition
For the moment, the second divided voltage plate of divider should be changed：Input resistance RinWith output resistance RoutCompared with factory-said value, change
More than 0.2%；No-load voltage ratio k changes more than 0.2% compared with factory-said value.
The invention has the advantages that：Being capable of correct second divided voltage plate under analog DC divider physical cabling mode
Input and output resistance, no-load voltage ratio, be advantageous to verify second divided voltage plate characterisitic parameter, find second divided voltage board defect in time, there is weight
Big economic benefit.
Brief description of the drawings
Fig. 1 is the structure principle chart of the calibration equipment of the present invention.
Embodiment
Embodiment 1
As shown in figure 1, a kind of HVDC divider second divided voltage board parameter calibration equipment, described second divided voltage plate 1
For the low-voltage arm both end voltage of divider to be carried out into secondary no-load voltage ratio, described calibration equipment includes being used to produce verification institute
The DC constant voltage source 2 of DC voltage is needed, for measuring the first current transformer 3 of the described output current of DC constant voltage source 2, is used
In the second current transformer 4 of the measurement input current of second divided voltage plate 1, for measuring direct current between the input terminal of second divided voltage plate 1
The first voltage transformer 5 of voltage, for the first variable resistor 6 of the low-voltage arm resistance of Equivalent DC divider, for measuring
The second voltage transformer 7 of DC voltage between the lead-out terminal of second divided voltage plate 1, for measuring the output current of second divided voltage plate 1
3rd current transformer 8, for the second adjustable resistance 9 of the optical-electric module internal resistance of Equivalent DC divider, the first controlling switch
K1, the second controlling switch K2, the 3rd controlling switch K3；Described DC constant voltage source 2, the first controlling switch K1, the first electric current are mutual
First variable resistor 6 and second in parallel with the input terminal described in two, described after sensor 3, the series connection of the second current transformer 4
It is in parallel with DC constant voltage source 2, the first controlling switch K1, the first current transformer 3 after controlling switch K2 series connection；The first described electricity
Press transformer 5 in parallel with the input terminal described in two；Described the second adjustable resistance 9, the 3rd controlling switch K3, the 3rd electric current
Transformer 8 is in parallel with the lead-out terminal described in two after connecting, described second voltage transformer 7 and the output end described in two
It is sub in parallel.The resistance value scope of first variable resistor 6 is 10K Ω to 10M Ω, and the resistance value scope of the second adjustable resistance 9 is
100k Ω to 1M Ω.
Embodiment 2
A kind of parameter verification method of HVDC divider second divided voltage plate 1, described second divided voltage plate 1 are used for direct current
The low-voltage arm both end voltage of divider carries out secondary no-load voltage ratio, as shown in figure 1, including for producing the straight of DC voltage needed for verification
Constant pressure source 2 is flowed, for measuring the first current transformer 3 of the described output current of DC constant voltage source 2, for measuring second divided voltage
Second current transformer 4 of the input current of plate 1, for measuring the first voltage of DC voltage between the input terminal of second divided voltage plate 1
Transformer 5, for the first variable resistor 6 of the low-voltage arm resistance of Equivalent DC divider, exported for measuring second divided voltage plate 1
The second voltage transformer 7 of DC voltage between terminal, for measuring the 3rd current transformer 8 of the output current of second divided voltage plate 1,
For the second adjustable resistance 9 of the optical-electric module internal resistance of Equivalent DC divider, it is comprised the following steps that：
Step 1, the low-voltage arm actual resistance R according to HVDC dividerLow-voltage arm, adjust the first variable resistor 6, R1=
RLow-voltage arm；
Step 2, the photoelectric conversion module quantity accessed according to second divided voltage plate 1 and internal resistance RInternal resistance, adjust the second adjustable resistance
9 access quantity, and adjust the second adjustable resistance 9, R2=RInternal resistance；
Step 3, the slowly voltage of rise DC constant voltage source 2, make the registration U of first voltage transformer 5inWith the volume of second divided voltage plate 1
It is equal to determine input voltage；Read the electric current registration I of the first current transformer 3in, the electric current registration I of the second current transformer 42；Read the
The voltage readings U of two voltage transformers 7out, the 3rd current transformer 8 electric current registration Iout；
The input resistance R of step 4, extraction second divided voltage plate 1inWith output resistance Rout：
The no-load voltage ratio k of step 5, extraction second divided voltage plate 1：
Step 6, the reliability for judging HVDC divider second divided voltage plate 1, decision method are：When meeting following condition
For the moment, the second divided voltage plate 1 of divider should be changed：Input resistance RinWith output resistance RoutCompared with factory-said value, change
More than 0.2%；No-load voltage ratio k changes more than 0.2% compared with factory-said value.
Above-listed detailed description is illustrating for possible embodiments of the present invention, and the embodiment simultaneously is not used to limit this hair
Bright the scope of the claims, all equivalence enforcements or change without departing from carried out by the present invention, it is intended to be limited solely by the scope of the claims of this case.
Claims (4)
1. a kind of HVDC divider second divided voltage board parameter calibration equipment, described second divided voltage plate is used for DC partial voltage
The low-voltage arm both end voltage of device carries out secondary no-load voltage ratio, it is characterised in that including the direct current for producing DC voltage needed for verification
Constant pressure source, it is defeated for measuring second divided voltage plate for measuring the first current transformer of described DC constant voltage source output current
Enter the second current transformer of electric current, for measuring the first voltage transformer of DC voltage between second divided voltage plate input terminal,
For the first variable resistor of the low-voltage arm resistance of Equivalent DC divider, for measuring direct current between second divided voltage plate lead-out terminal
The second voltage transformer of voltage, for measuring the 3rd current transformer of second divided voltage plate output current, for Equivalent DC
The second adjustable resistance of the optical-electric module internal resistance of divider.
A kind of 2. HVDC divider second divided voltage board parameter calibration equipment according to claim 1, it is characterised in that
Also include the first controlling switch K1 of control, the second controlling switch K2, the 3rd controlling switch K3；Described DC constant voltage source, first
It is in parallel with the input terminal described in two after controlling switch K1, the first current transformer, the series connection of the second current transformer, it is described
First variable resistor connected with the second controlling switch K2 after with DC constant voltage source, the first controlling switch K1, the first current transformer
It is in parallel；Described first voltage transformer is in parallel with the input terminal described in two；Described the second adjustable resistance, the 3rd control
, described second voltage transformer and two in parallel with the lead-out terminal described in two after switch K3, the series connection of the 3rd current transformer
Individual described lead-out terminal is in parallel.
3. a kind of HVDC divider second divided voltage board parameter calibration equipment according to claim 1 or 2, its feature exist
In the resistance value scope of, the first variable resistor be 10K Ω to 10M Ω, the resistance value scope of the second adjustable resistance for 100k Ω extremely
1MΩ。
4. a kind of HVDC divider second divided voltage board parameter method of calibration, described second divided voltage plate is used for DC partial voltage
The low-voltage arm both end voltage of device carries out secondary no-load voltage ratio, it is characterised in that including the direct current for producing DC voltage needed for verification
Constant pressure source, it is defeated for measuring second divided voltage plate for measuring the first current transformer of described DC constant voltage source output current
Enter the second current transformer of electric current, for measuring the first voltage transformer of DC voltage between second divided voltage plate input terminal,
For the first variable resistor of the low-voltage arm resistance of Equivalent DC divider, for measuring direct current between second divided voltage plate lead-out terminal
The second voltage transformer of voltage, for measuring the 3rd current transformer of second divided voltage plate output current, for Equivalent DC
The second adjustable resistance of the optical-electric module internal resistance of divider, it is comprised the following steps that：
Step 1, the low-voltage arm actual resistance R according to HVDC dividerLow-voltage arm, adjust the first variable resistor R1=RLow-voltage arm；
Step 2, the photoelectric conversion module quantity accessed according to second divided voltage plate and internal resistance RInternal resistance, adjust connecing for the second adjustable resistance
Enter quantity, and adjust the second adjustable resistance R2=RInternal resistance；
Step 3, slowly rise DC constant voltage source voltage, make first voltage transformer registration UinInput electricity specified with second divided voltage plate
Press equal；Read the first current transformer electric current registration Iin, the second current transformer electric current registration I2；Read second voltage mutual inductance
The voltage readings U of deviceout, the 3rd current transformer electric current registration Iout；
Step 4, the input resistance R for extracting second divided voltage plateinWith output resistance Rout：
Step 5, the no-load voltage ratio k for extracting second divided voltage plate：
Step 6, the reliability for judging HVDC divider second divided voltage plate, decision method are：When meeting one of following condition
When, the second divided voltage plate of divider should be changed：Input resistance RinWith output resistance RoutCompared with factory-said value, change exceedes
0.2%；No-load voltage ratio k changes more than 0.2% compared with factory-said value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711092643.3A CN107748345B (en) | 2017-11-08 | 2017-11-08 | Device and method for verifying parameters of secondary voltage dividing plate of high-voltage direct-current voltage divider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711092643.3A CN107748345B (en) | 2017-11-08 | 2017-11-08 | Device and method for verifying parameters of secondary voltage dividing plate of high-voltage direct-current voltage divider |
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| Publication Number | Publication Date |
|---|---|
| CN107748345A true CN107748345A (en) | 2018-03-02 |
| CN107748345B CN107748345B (en) | 2023-05-30 |
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