CN106249054A - Capacitance type potential transformer and integration detection sensor thereof - Google Patents
Capacitance type potential transformer and integration detection sensor thereof Download PDFInfo
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- CN106249054A CN106249054A CN201610830183.9A CN201610830183A CN106249054A CN 106249054 A CN106249054 A CN 106249054A CN 201610830183 A CN201610830183 A CN 201610830183A CN 106249054 A CN106249054 A CN 106249054A
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- capacitance type
- potential transformer
- type potential
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2617—Measuring dielectric properties, e.g. constants
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
-
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Relating To Insulation (AREA)
Abstract
nullThe present invention provides a kind of capacitance type potential transformer and integration detection sensor thereof，The integration detection sensor of capacitance type potential transformer includes voltage sampling module、Current sampling module、Superfrequency shelf depreciation sensing module and high frequency electric sensing module，Voltage sampling module gathers capacitance type potential transformer voltage data，Current sampling module gathers the current data of capacitance type potential transformer，Superfrequency shelf depreciation sensing module gathers the local discharge signal within capacitance type potential transformer，High frequency electric sensing module gathers the local discharge signal of capacitance type potential transformer，Whole integration detection sensor can gather the voltage parameter of capacitance type potential transformer to be detected、Current parameters、Internal local discharge signal and local discharge signal，The dielectric loss of this capacitance type potential transformer of easy detection is got final product based on these parameter external detection equipment gathered、Internal shelf depreciation and shelf depreciation.
Description
Technical field
The present invention relates to testing techniques of equipment field, particularly relate to capacitance type potential transformer and integration detection passes
Sensor.
Background technology
Voltage transformer and transformator are the most alike, the voltage being all used on conversion line.But transformator voltage of transformation
Purpose be to carry electric energy, therefore capacity is very big, be typically all with kilovolt-ampere or megavolt-ampere as unit of account, and voltage is mutual
The purpose of sensor voltage of transformation, is primarily used to power to measuring instruments and protective relaying device, for measurement circuitry voltage,
Power and electric energy, or it is used for the expensive equipment in protection circuit when line failure.Operation principle pressed by voltage transformer
Divide, electromagnetic potential transformer, capacitance type potential transformer and electronic type voltage transformer can be divided into.
At present, capacitance type potential transformer has got more and more and has been applied in electric power network.For capacitor voltage mutual inductance
The live testing of device or on-line monitoring work are the most extensively carried out, but generally only detect its dielectric loss, and to electric capacity
Formula voltage transformer medium must install current sampling device, at bus PT during detecting respectively on voltage transformer
Voltage sampling device is installed at (Potential transformer, voltage transformer) place, between the two must be through longer signal electricity
Cable introduces measuring instrument, can calculate the dielectric loss of tested voltage transformer.
Visible, the detection device detection process complexity of general capacitance type potential transformer and function singleness, carry out to user
Capacitance type potential transformer detection is made troubles.
Summary of the invention
Based on this, it is necessary to for the detection device operation complexity of general capacitance type potential transformer and asking of function singleness
Topic, it is provided that a kind of simple to operate and capacitance type potential transformer of diverse in function and integration detection sensor thereof.
A kind of capacitance type potential transformer integration detection sensor, including voltage sampling module, current sampling module,
Superfrequency shelf depreciation sensing module and high frequency electric sensing module；
Voltage sampling module is connected with double measurement winding in capacitance type potential transformer to be detected, current sampling module with
The end shield line of capacitance type potential transformer to be detected connects, and high frequency electric sensing module is serially connected with capacitor voltage mutual inductance to be detected
The end shield earth lead of device, high frequency electric sensing module is connected with current sampling module by end shield earth lead, and superfrequency local is put
Electricity sensing module is connected with end shield earth lead, and the spacing of the earth terminal of superfrequency shelf depreciation sensing module and end shield earth lead
From the spacing less than high frequency electric sensing module Yu the earth terminal of end shield earth lead；
Voltage sampling module gathers the voltage of capacitance type potential transformer to be detected, current sampling module gathers electricity to be detected
The electric current of appearance formula voltage transformer, superfrequency shelf depreciation sensing module gather the office within capacitance type potential transformer to be detected
Portion's discharge signal, high frequency electric sensing module gathers the local discharge signal of capacitance type potential transformer to be detected.
The integration detection sensor of capacitance type potential transformer of the present invention, voltage sampling module, current sampling module, spy
High frequency partial electric discharge sensing module and high frequency electric sensing module, voltage sampling module gathers capacitance type potential transformer voltage
Data, current sampling module gathers the current data of capacitance type potential transformer, and superfrequency shelf depreciation sensing module gathers electricity
Local discharge signal within appearance formula voltage transformer, high frequency electric sensing module gathers the local of capacitance type potential transformer and puts
The signal of telecommunication, whole integration detection sensor can gather the voltage parameter of capacitance type potential transformer to be detected, current parameters,
Internal local discharge signal and local discharge signal, get final product easy detection based on these parameter external detection equipment gathered
The dielectric loss of this capacitance type potential transformer, internal shelf depreciation and shelf depreciation, it is seen that capacitor voltage of the present invention
The integration detection sensor of transformer is a kind of simple to operate and the equipment of diverse in function.
Additionally the present invention also provides for a kind of capacitance type potential transformer, including capacitance type potential transformer body and as above
Capacitance type potential transformer integration detection sensor, capacitance type potential transformer integration detection sensor can be just
Prompt collection, the voltage parameter of capacitance type potential transformer, current parameters, internal local discharge signal and shelf depreciation letter
Number, the medium getting final product this capacitance type potential transformer body of easy detection based on these parameter external detection equipment gathered damages
Consumption, internal shelf depreciation and shelf depreciation, it is achieved simple and multi-functional detection.
Accompanying drawing explanation
Fig. 1 is the structural representation of integration detection first embodiment of sensor of capacitance type potential transformer of the present invention
Figure；
Fig. 2 is the structural representation of integration detection second embodiment of sensor of capacitance type potential transformer of the present invention
Figure.
Detailed description of the invention
As it is shown in figure 1, a kind of capacitance type potential transformer integration detection sensor, including voltage sampling module 100,
Current sampling module 200, superfrequency shelf depreciation sensing module 300 and high frequency electric sensing module 400；
Voltage sampling module 100 is connected with double measurement winding in capacitance type potential transformer to be detected, current sampling mould
Block 200 is connected with the end shield line of capacitance type potential transformer to be detected, and high frequency electric sensing module 400 is serially connected with electric capacity to be detected
The end shield earth lead of formula voltage transformer, high frequency electric sensing module 400 is by end shield earth lead with current sampling module 200 even
Connecing, superfrequency shelf depreciation sensing module 300 is connected with end shield earth lead, and superfrequency shelf depreciation sensing module 300 is with last
The spacing of the earth terminal of screen earth lead is less than the spacing of high frequency electric sensing module 400 with the earth terminal of end shield earth lead；
Voltage sampling module 100 gathers the voltage of capacitance type potential transformer to be detected, current sampling module 200 gathers and treats
The detection electric current of capacitance type potential transformer, superfrequency shelf depreciation sensing module 300 gather capacitor voltage mutual inductance to be detected
Local discharge signal within device, high frequency electric sensing module 400 gathers the shelf depreciation of capacitance type potential transformer to be detected
Signal.
Voltage sampling module 100 can record its voltage signal from the double measurement winding of capacitance type potential transformer.Electric current
Sampling module 200 can record the end shield current signal of voltage transformer.The voltage signal obtained based on sampling and current signal lead to
Cross the dielectric loss that can be calculated capacitance type potential transformer.Non-essential, voltage sampling module 100 and current sampling module
200 can sample based on predeterminated frequency in sampling process, and can abandon for abnormal data.Further
For, abnormal data can be understood as after capacitance type potential transformer to be detected normally works, during the most adjacent two samplings
Between point voltage/current data amplitude of variation exceed the data of preset value.
Superfrequency shelf depreciation sensing module 300 compared to high frequency electric sensing module 400 closer to condenser type to be detected
The earth terminal of the end shield earth lead of voltage transformer.Superfrequency shelf depreciation sensing module 300 is mutual with capacitor voltage to be detected
The end shield earth lead of sensor is connected, using the end shield of capacitance type potential transformer as a part of antenna of local discharge sensor,
Owing to end shield is in the inside of capacitance type potential transformer, the local within capacitance type potential transformer can be received delicately and put
The signal of telecommunication, can improve superfrequency Partial Discharge Detection performance largely.
High frequency electric sensing module 400 is installed on the end shield earth lead of capacitance type potential transformer, can obtain end shield and connect
High-frequency current signal on ground wire, thus detect the local discharge signal of voltage transformer.
The integration detection sensor of capacitance type potential transformer of the present invention, voltage sampling module 100, current sampling module
200, superfrequency shelf depreciation sensing module 300 and high frequency electric sensing module 400, voltage sampling module 100 gathers electric capacity
Formula voltage transformer voltage data, current sampling module 200 gathers the current data of capacitance type potential transformer, superfrequency local
Electric discharge sensing module 300 gathers the local discharge signal within capacitance type potential transformer, and high frequency electric sensing module 400 gathers
The local discharge signal of capacitance type potential transformer, it is mutual that whole integration detection sensor can gather capacitor voltage to be detected
The voltage parameter of sensor, current parameters, internal local discharge signal and local discharge signal, the parameter gathered based on these
External detection equipment gets final product the dielectric loss of this capacitance type potential transformer of easy detection, internal shelf depreciation and local and puts
Electricity, it is seen that the integration detection sensor of capacitance type potential transformer of the present invention is a kind of simple to operate and the setting of diverse in function
Standby.
As in figure 2 it is shown, wherein in an embodiment, the integration detection sensor of capacitance type potential transformer also includes
The anti-open-circuit protector of end shield electric current 500, the anti-open-circuit protector of end shield electric current 500 is arranged at capacitance type potential transformer to be detected
Between end shield line and end shield earth lead, and the junction point of the anti-open-circuit protector of end shield electric current 500 and end shield earth lead connects with end shield
Distance between the earth terminal of ground wire less than superfrequency shelf depreciation sensing module 600 and described end shield earth lead junction point with
Distance between the earth terminal of described end shield earth lead.
The anti-open-circuit protector of end shield electric current 500 is used for preventing from going out between capacitance type potential transformer end shield and end shield earth lead
Existing open circuit situation.End shield electric current anti-open-circuit protector 500 one end is connected to end shield, and the other end is connected to end shield earth lead, and connects
The junction point being connected to end shield earth lead is connected to the junction point of end shield earth lead closer to end shield earth lead compared to other device
Earth terminal.So can preferably protect integration detection each device of sensor of capacitance type potential transformer, it is to avoid meaning
The generation of outer situation.
As in figure 2 it is shown, wherein in an embodiment, the integration detection sensor of capacitance type potential transformer also includes
Overvoltage protector 600, overvoltage protector 600 is connected with voltage sampling module 100.
Overvoltage protector 600 is used for protecting whole circuit, prevents overvoltage phenomenon, it is to avoid the generation of fortuitous event.
As in figure 2 it is shown, wherein in an embodiment, the integration detection sensor of capacitance type potential transformer also includes
Reference voltage measurement port 700, reference voltage measurement port 700 is connected with voltage sampling module 100.
Reference voltage measurement port 700 is for being connected with external detection equipment, so that external detection equipment (dielectric loss inspection
Measurement equipment) receive the voltage of capacitance type potential transformer to be detected that voltage sampling module 100 samples.It is pointed out that
Wherein in an embodiment, when the integration detection sensor of capacitance type potential transformer includes overvoltage protector 600 and ginseng
When examining voltage measurement port 700, voltage sampling module 100 is by transfer protector 600 with reference voltage measurement port 700 even
Connect.
As in figure 2 it is shown, wherein in an embodiment, the integration detection sensor of capacitance type potential transformer also includes
High-frequency signal port 800 and ultrahigh-frequency signal port 900, high-frequency signal port 800 is connected with high frequency electric sensing module 400,
Ultrahigh-frequency signal port 900 is connected with superfrequency shelf depreciation sensing module 300.
High-frequency signal port 800, for being connected with external detection equipment, is specifically connected with outer partial discharge examination equipment,
So that Partial Discharge Detection equipment receives the local of the capacitance type potential transformer to be detected that high frequency electric sensing module 400 gathers
Discharge signal.Ultrahigh-frequency signal port 900 is for being connected with external detection equipment, specifically with outside superfrequency Partial Discharge Detection
Equipment connects, so that superfrequency Partial Discharge Detection equipment receives the to be detected of superfrequency shelf depreciation sensing module 300 collection
Local discharge signal within capacitance type potential transformer.
Wherein in an embodiment, the integration detection sensor of capacitance type potential transformer also includes coaxial cable,
Superfrequency shelf depreciation sensing module 300 is connected to end shield earth lead by coaxial cable.
Coaxial cable has referred to two concentric conductors, and conductor and screen layer share the cable in same axle center.Most common
The copper conductors isolated by insulant of coaxial cable form, in the outside of nexine insulant be another layer of ring shaped conductor and
Its insulator, the most whole cable is encased by the sheath of polrvinyl chloride or teflon material.Superfrequency shelf depreciation sensing module
300 are connected to end shield earth lead, beneficially signal stabilization, high efficiency of transmission by coaxial cable.
The present invention also provides for a kind of capacitance type potential transformer, including capacitance type potential transformer body and electricity as above
The integration detection sensor of appearance formula voltage transformer, the integration detection sensor of capacitance type potential transformer can convenient be adopted
Collection, the voltage parameter of capacitance type potential transformer, current parameters, internal local discharge signal and local discharge signal, base
Can the dielectric loss of this capacitance type potential transformer body of easy detection, inside in these parameter external detection equipment gathered
Shelf depreciation and shelf depreciation, it is achieved simple and multi-functional detection.
Wherein in an embodiment, capacitance type potential transformer also includes that capacitor dielectric is lost detection module, high frequency office
Portion's discharge examination module and superfrequency Partial Discharge Detection module, capacitor dielectric loss detection module respectively with voltage sampling mould
Block and current sampling module connect, and high frequency partial discharge examination module is connected with high frequency electric sensing module, superfrequency local
Discharge examination module is connected with superfrequency shelf depreciation sensing module.
Capacitor dielectric loss detection module, for according to the voltage sample result received and current sample result, calculates electricity
The dielectric loss of appearance formula voltage transformer.High frequency partial discharge examination module is for according to the high-frequency current signal received, entering
The Partial Discharge Detection of row capacitance type potential transformer.Superfrequency Partial Discharge Detection module is for according to the superfrequency received
Current signal, carries out the Partial Discharge Detection within capacitance type potential transformer.
Above example only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but can not
Therefore it is construed as limiting the scope of the patent.It should be pointed out that, for the person of ordinary skill of the art,
On the premise of present inventive concept, it is also possible to make some deformation and improvement, these broadly fall into protection scope of the present invention.
Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. the integration detection sensor of a capacitance type potential transformer, it is characterised in that include voltage sampling module, electric current
Sampling module, superfrequency shelf depreciation sensing module and high frequency electric sensing module；
Described voltage sampling module is connected with double measurement winding in capacitance type potential transformer to be detected, described current sampling mould
Block is connected with the end shield line of described capacitance type potential transformer to be detected, and described high frequency electric sensing module is serially connected with described to be checked
Surveying the end shield earth lead of capacitance type potential transformer, described high frequency electric sensing module is by described end shield earth lead and described electricity
Stream sampling module connects, and described superfrequency shelf depreciation sensing module is connected with described end shield earth lead, and described superfrequency office
Electric discharge sensing module in portion's is less than described high frequency electric sensing module with described with the spacing of the earth terminal of described end shield earth lead
The spacing of the earth terminal of end shield earth lead；
Described voltage sampling module gathers the voltage of described capacitance type potential transformer to be detected, described current sampling module collection
The electric current of described capacitance type potential transformer to be detected, described superfrequency shelf depreciation sensing module gather described electric capacity to be detected
Local discharge signal within formula voltage transformer, it is mutual that described high frequency electric sensing module gathers described capacitor voltage to be detected
The local discharge signal of sensor.
The integration detection sensor of capacitance type potential transformer the most according to claim 1, it is characterised in that also include
The anti-open-circuit protector of end shield electric current, the described anti-open-circuit protector of end shield electric current is arranged at described capacitance type potential transformer to be detected
End shield line and end shield earth lead between, and the junction point of the described anti-open-circuit protector of end shield electric current and described end shield earth lead with
Distance between the earth terminal of described end shield earth lead is less than described superfrequency shelf depreciation sensing module and described end shield ground connection
Distance between junction point and the earth terminal of described end shield earth lead of line.
The integration detection sensor of capacitance type potential transformer the most according to claim 1, it is characterised in that also include
Overvoltage protector, described overvoltage protector is connected with described voltage sampling module.
The integration detection sensor of capacitance type potential transformer the most according to claim 1, it is characterised in that also include
Reference voltage measurement port, described reference voltage measurement port is connected with described voltage sampling module.
The integration detection sensor of capacitance type potential transformer the most according to claim 1, it is characterised in that also include
High-frequency signal port and ultrahigh-frequency signal port, described high-frequency signal port is connected with described high frequency electric sensing module, described
Ultrahigh-frequency signal port is connected with described superfrequency shelf depreciation sensing module.
The integration detection sensor of capacitance type potential transformer the most according to claim 1, it is characterised in that also include
Coaxial cable, described superfrequency shelf depreciation sensing module is connected to described end shield earth lead by described coaxial cable.
7. a capacitance type potential transformer, it is characterised in that include interconnective capacitance type mutual inductor body and such as power
Profit requires the integration detection sensor of the capacitance type potential transformer described in 1-6 any one.
Capacitance type potential transformer the most according to claim 7, it is characterised in that also include capacitor dielectric loss detection mould
Block, high frequency partial discharge examination module and superfrequency Partial Discharge Detection module；
Described capacitor dielectric loss detection module is connected with described voltage sampling module and described current sampling module respectively, institute
State high frequency partial discharge examination module to be connected with described high frequency electric sensing module, described superfrequency Partial Discharge Detection module with
Described superfrequency shelf depreciation sensing module connects.
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| CN201610830183.9A CN106249054B (en) | 2016-09-18 | 2016-09-18 | Capacitance type voltage transformer and integrated detection sensor thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106653288A (en) * | 2017-01-03 | 2017-05-10 | 繁昌县易能科技有限责任公司 | Safe voltage transformer |
| CN106772200A (en) * | 2017-01-25 | 2017-05-31 | 云南电网有限责任公司电力科学研究院 | CVT error in dipping anomaly assessment method and system based on capacitive earth current |
| CN109541412A (en) * | 2018-12-20 | 2019-03-29 | 国网上海市电力公司 | Transformer overvoltage and partial discharge comprehensive monitor system and method based on bottom shielding of bushing |
| CN110471020A (en) * | 2019-08-26 | 2019-11-19 | 云南电网有限责任公司曲靖供电局 | A kind of capacitance type potential transformer monitoring device with self diagnosis |
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| CN110471020A (en) * | 2019-08-26 | 2019-11-19 | 云南电网有限责任公司曲靖供电局 | A kind of capacitance type potential transformer monitoring device with self diagnosis |
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Effective date of registration: 20200925 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. |
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