CN108922756A - A kind of dry type hollow shunt reactor observation circuit - Google Patents
A kind of dry type hollow shunt reactor observation circuit Download PDFInfo
- Publication number
- CN108922756A CN108922756A CN201810886419.XA CN201810886419A CN108922756A CN 108922756 A CN108922756 A CN 108922756A CN 201810886419 A CN201810886419 A CN 201810886419A CN 108922756 A CN108922756 A CN 108922756A
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- group
- dry type
- shunt reactor
- type hollow
- hollow shunt
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
- H01F27/402—Association of measuring or protective means
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
Abstract
A kind of dry type hollow shunt reactor observation circuit, belongs to technical field of electric equipment, specially a kind of dry type hollow shunt reactor observation circuit.The present invention is directed to existing defect, provides a kind of dry type hollow shunt reactor observation circuit for being able to suppress Overvoltage Amplitude, controlling oscillation frequency, accelerate concussion decaying, reducing breaker re-ignition probability, protection lightning surge.A kind of dry type hollow shunt reactor observation circuit according to the present invention, one end of vacuum circuit breaker group is connect with bus U1, the other end is connect with dry type hollow shunt reactor group, arrester group, divider group are connect with dry type hollow shunt reactor group input terminal respectively, and Hall current sensor group is connect with dry type hollow shunt reactor group ground terminal.
Description
Technical field
The invention belongs to technical field of electric equipment, specially a kind of dry type hollow shunt reactor observation circuit.
Background technique
With the expansion for the pace and scope that China's power grid construction is increasingly accelerated, electrical network capacity continues to increase, and power grid is to nothing
The demand of function also constantly increases.In modern bulk power system, the device for reactive compensation is divided into inductive reactive power compensation
Device (mainly including shunt reactor and Static Var Compensator) and capacitive reactive power compensation device；As reactive power compensator
Shunt reactor, capacity is generally determining according to route capacitive charge power, the infield one of dry type hollow shunt reactor
As to be connected by breaker with bus on the low-pressure side bus in substation.Also there is part dry type hollow shunt reactor
Infield is a bus of route centre or end substation.
Dry type hollow shunt reactor, dry type hollow shunt reactor are often installed on low-pressure side bus in substation
When by vacuum circuit breaker switching, overvoltage often is generated in bus bar side and reactor side, reactor turn-to-turn insulation is caused to be damaged
It ruins and bus phase fault, threat electrical equipment safety influences system safety operation.Caused by vacuum circuit breaker switch
Overvoltage is difficult to avoid that, and its superior arc extinction performance makes it obtain wide popularization and application.Therefore a kind of vacuum circuit breaker
Switching shunt reactor causes the protection system of overvoltage to seem particularly significant, can effectively inhibit switching overvoltage, excessively electric
The decline of pressure oscillation frequency, overvoltage attenuation process accelerate, can reduce breaker breakdown re-ignition.In addition, hollow power reactor exists
In operation frequently and the failures such as local arc lead to reactor interturn short circuit fault due to insulation ag(e)ing, coil dampness, switching,
Cause reactor on fire, burn reactor, cause irreversible destruction, therefore, probes into a kind of dry type hollow shunt reactor prison
Slowdown monitoring circuit occurs shorted-turn fault initial stage in shunt reactor, finds failure in time and cut fault reactance device from system
It is very necessary out.
It is therefore desirable to which one kind is able to suppress Overvoltage Amplitude, control oscillation frequency, accelerates concussion decaying, reduces open circuit
Device re-ignition probability, the dry type hollow shunt reactor observation circuit for protecting lightning surge.
Summary of the invention
The present invention cannot inhibit Overvoltage Amplitude, not can control for existing dry type hollow shunt reactor observation circuit
Oscillation frequency, concussion are not easy to decay, breaker re-ignition probability is big, cannot protect the defect of lightning surge, provide a kind of energy
Enough inhibit Overvoltage Amplitude, control oscillation frequency, accelerates concussion decaying, reduces breaker re-ignition probability, protection lightning surge
Dry type hollow shunt reactor observation circuit.
A kind of technical solution of dry type hollow shunt reactor observation circuit according to the present invention is as follows：
A kind of dry type hollow shunt reactor observation circuit according to the present invention, it includes vacuum circuit breaker group, takes shelter from the thunder
Device group, divider group, dry type hollow shunt reactor group and Hall current sensor group, one end of the vacuum circuit breaker group with
Bus U1 connection, the other end are connect with dry type hollow shunt reactor group, and the arrester group, divider group are empty with dry type respectively
The connection of heart shunt reactor group input terminal, the Hall current sensor group and dry type hollow shunt reactor group ground terminal connect
It connects.
Further：The vacuum circuit breaker group, dry type hollow shunt reactor group and Hall current sensor group difference
Including three monomers.
Further：The Hall current sensor monomer uses TBC50AP magnetic balance type Hall current sensor.
Further：The vacuum circuit breaker monomer uses ZN12-40.5 type breaker.
Further：The arrester group is the star-like arrester of combined type four, including four arrester monomers, wherein three
One end of arrester monomer is connected with three vacuum circuit breakers respectively, the other end is connected simultaneously the one of the 4th arrester monomer
End, the other end ground connection of the 4th arrester monomer.
Further：Four arrester monomers are all made of combined type Zinc-Oxide Arrester.
Further：The divider group includes three partial pressure branches, and every partial pressure branch includes two RC series electricals
Road and two RC series circuit series aiding connections, the resistance terminal of three partial pressure branches are separately connected three dry-type hollow parallel electricity
The input terminal of anti-device monomer, the capacitance terminal ground connection of three partial pressure branches.
Further：Sampling voltage U2 is connected between two RC series circuits of every partial pressure branch.
A kind of beneficial effect of dry type hollow shunt reactor observation circuit according to the present invention is：
A kind of dry type hollow shunt reactor observation circuit of the present invention passes through capacitance-resistance series voltage divider, Hall electricity
Flow sensor respectively extracts the voltage of dry type hollow shunt reactor, electric current, is dry type hollow shunt reactor turn-to-turn
The fault monitoring device of insulation provides reliable signal foundation.In addition, the terminals parallel combination type four in reactor star-like is kept away
Thunder device, furthermore capacitance-resistance series connection bleeder circuit can be used as RC resistance capaciting absorpting circuit, and above two parts device is dry-type hollow parallel electricity
Anti- device work system, providing can be effectively suppressed Overvoltage Amplitude, oscillation frequency decline, accelerates decaying, and can reduce open circuit
The reactor switching overvoltage protection system of device re-ignition probability, furthermore the protection to lightning surge can also be provided in the system.
By capacitance-resistance series voltage divider, Hall current sensor respectively to the voltage of dry type hollow shunt reactor, electric current
It extracts, provides reliable signal foundation for the fault monitoring device of dry type hollow shunt reactor turn-to-turn insulation.In addition,
The star-like arrester of terminals parallel combination type four of reactor, furthermore capacitance-resistance series connection bleeder circuit can be used as RC resistance-capacitance absorption electricity
Road, above two parts device are dry type hollow shunt reactor work system, provide and Overvoltage Amplitude, concussion can be effectively suppressed
Frequency decline accelerates decaying, and can reduce the reactor switching overvoltage protection system of breaker re-ignition probability, and furthermore this is
The protection to lightning surge can also be provided in system.
Detailed description of the invention
Fig. 1 is the structure chart of reactor switching overvoltage protection system；
Fig. 2 is Hall current sensor schematic diagram；
Fig. 3 is that Hall current sensor installs wiring diagram.
In figure：1 is vacuum circuit breaker group, and 2 be arrester group, and 3 be divider group, and 4 be dry type hollow shunt reactor group,
5 be Hall current sensor group.
Specific embodiment
Below with reference to embodiment, the following further describes the technical solution of the present invention, and however, it is not limited to this, all right
Technical solution of the present invention is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be contained
Lid is within the protection scope of the present invention.
Embodiment 1
It is illustrated with reference to Fig. 1 the present embodiment, in the present embodiment, a kind of dry type hollow shunt reactor according to the present invention
Observation circuit, it includes vacuum circuit breaker group 1, arrester group 2, divider group 3, dry type hollow shunt reactor group 4 and Hall
One end of current sensor group 5, the vacuum circuit breaker group 1 is connect with bus U1, the other end and dry type hollow shunt reactor
4 connection of group, the arrester group 2, divider group 3 are connect with dry type hollow shunt reactor group ground terminal respectively, the Hall
Current sensor group is connect with dry type hollow shunt reactor group output end.
More specifically：The vacuum circuit breaker group 1, dry type hollow shunt reactor group 4 and Hall current sensor group 5
Respectively include three monomers.
More specifically：The Hall current sensor monomer uses TBC50AP magnetic balance type Hall current sensor.
More specifically：The vacuum circuit breaker monomer uses ZN12-40.5 type breaker.
More specifically：The arrester group 1 is the star-like arrester of combined type four, including four arrester monomers, wherein
One end of three arrester monomers is connected with three vacuum circuit breakers respectively, the other end is connected simultaneously the 4th arrester monomer
One end, the other end ground connection of the 4th arrester monomer.
More specifically：Four arrester monomers are all made of combined type Zinc-Oxide Arrester.
More specifically：The divider group includes three partial pressure branches, and every partial pressure branch includes two RC series connection
Circuit and two RC series circuit series aiding connections, the resistance terminal of three partial pressure branches are separately connected three dry-type hollow parallels
The input terminal of reactor monomer, the capacitance terminal ground connection of three partial pressure branches.
More specifically：Sampling voltage U2 is connected between two RC series circuits of every partial pressure branch.
A kind of dry type hollow shunt reactor observation circuit designed by the present invention, it includes vacuum circuit breaker, combined type
Four star-like arresters, divider, dry type hollow shunt reactor, Hall current sensor.Vacuum circuit breaker is connect with bus, separately
One end is connect with dry type hollow shunt reactor；The star-like arrester of combined type four is connected with dry type hollow shunt reactor lead-in wire terminal
It connects；Capacitance-resistance series voltage divider is connected with dry type hollow shunt reactor input terminal；Hall current sensor and dry-type hollow are simultaneously
Connection reactor ground terminal is connected.Vacuum circuit breaker part includes a three-phase vacuum breaker, and difference one end connects dry type
Air-core shunt reactor, vacuum circuit breaker play the role of switch in parallel reactor.The vacuum circuit breaker opens electricity using north
The ZN12-40.5 type breaker of gas；This breaker structure is simple, connecting-disconnecting function is strong, the service life is long, operating function is complete, no explosion
Dangerous, maintenance simplicity.The star-like arrester of combined type four, including four arrester monomers, wherein three arrester one end respectively with
Three vacuum circuit breakers are connected, and three arrester other ends are connected one end of the 4th arrester monomer again after connecting, and the 4th
The other end of a arrester monomer is grounded；Arrester monomer is using combined type Zinc-Oxide Arrester.Capacitance-resistance series voltage divider
Including three RC part in series, each of which RC part in series is made of two capacitors and resistance.Resistance series capacitance series electrical again
Series capacitance again after resistance, is then grounded.The capacitor and resistance joint that the wiring of sampling voltage is connected between.Resistance R1's
Value is 100 Ω, and the value of capacitor C1 is 0.1uf；The value of resistance R2 is 200k Ω, and the value of capacitor C2 is 2000uf.Dry-type hollow is simultaneously
Join reactor section, include three 35kV dry-type air-core reactors, one end respectively with vacuum circuit breaker, combined type four is star-like keeps away
Thunder device, capacitance-resistance series voltage divider are connected, other end ground connection.Hall current sensor and air reactor terminals low-pressure side phase
Connection.And Hall current sensor selects TBC50AP magnetic balance type Hall current sensor.
Capacitance-resistance series voltage divider is analyzed, according to the voltage divider principle of circuit, listing its voltage transitive relation is：
Circuit works under 35KV power-frequency voltage, and capacitance partial pressure arm is identical with electric resistance partial pressure arm, and in order to guarantee capacitance-resistance
Series voltage divider has the requirement of RC absorbing circuit, takes R by calculating1、R2、C1、C2Value it is as follows：
R1=100 Ω, R2=200k Ω, C1=0.1 μ F, C2Its intrinsic standoff ratio is 2000 in the case where=200 μ F:1, meet
Sample circuit requirement.The each section of capacitance-resistance series voltage divider three parts can have the RC series connection of R=100 Ω, C=0.1 μ F to inhale
The effect for receiving circuit, can be used as the resistance capaciting absorpting circuit of overvoltage, protection reactor.
Embodiment 2
It is illustrated in combination with fig. 2 the present embodiment, in the present embodiment, a kind of dry type hollow shunt reactor prison of the present invention
Slowdown monitoring circuit, as tested electric current IPWhen flowing through primary side major loop, magnetic field is generated around conducting wire, the magnetic field induction to hall device
On, it generates an output signal and drives corresponding power tube and turn it on, to obtain a compensation electric current IS, ISBy multiturn around
Group generates magnetic field, and the magnetic field and the magnetic field that tested electric current generates are exactly the opposite, so that original magnetic field is compensated for, so that Hall device
Part output is gradually reduced.If primary side the number of turns is NP, magnetic flux ΦP, secondary number of edges is NS, magnetic flux ΦS, work as ΦP=ΦSWhen, have：
IpNp=IsNsFormula (1)
I at this timesIt is not further added by, arrives magnetic balance state.Compensate electric current IsFlow through measurement resistance Rm, generate measurement voltage U0, three
Person meets Ohm's law, i.e.,
By measuring U0Size tested size of current can be obtained, by formula (1) and formula (2) must be tested the size of electric current with
Output voltage relational expression is：
Embodiment 3
Illustrate the present embodiment in conjunction with Fig. 3, in the present embodiment, a kind of dry type hollow shunt reactor prison of the present invention
Slowdown monitoring circuit, the installation wiring diagram of Hall current sensor, TBC50AP are three leaded molded, provide technical parameter according to it, originally set
Meter selects ± 15V power supply power supply altogether, sample resistance RmTake 62 Ω.The turn ratio that the turn ratio of TBC50AP provides is 1:1000,
The relationship that must be tested between electric current and output voltage is：
IP=16.129U0。
Claims (8)
1. a kind of dry type hollow shunt reactor observation circuit, which is characterized in that it includes vacuum circuit breaker group (1), arrester
Group (2), divider group (3), dry type hollow shunt reactor group (4) and Hall current sensor group (5), the vacuum circuit breaker
One end of group (1) is connect with bus U1, and the other end is connect with dry type hollow shunt reactor group (4), the arrester group (2),
Divider group (3) is connect with dry type hollow shunt reactor group input terminal respectively, and the Hall current sensor group and dry type are empty
The connection of heart shunt reactor group ground terminal.
2. a kind of dry type hollow shunt reactor observation circuit according to claim 1, which is characterized in that the vacuum is disconnected
Road device group (1), dry type hollow shunt reactor group (4) and Hall current sensor group (5) respectively include three monomers.
3. a kind of dry type hollow shunt reactor observation circuit according to claim 2, which is characterized in that the Hall electricity
Flow sensor monomer uses TBC50AP magnetic balance type Hall current sensor.
4. a kind of dry type hollow shunt reactor observation circuit according to claim 2, which is characterized in that the vacuum is disconnected
Road device monomer uses ZN12-40.5 type breaker.
5. a kind of dry type hollow shunt reactor observation circuit according to claim 2, which is characterized in that the arrester
Group (1) is the star-like arrester of combined type four, including four arrester monomers, wherein one end of three arrester monomers is respectively with three
A vacuum circuit breaker is connected, one end of the other end while the 4th arrester monomer of connecting, the 4th arrester monomer it is another
One end ground connection.
6. a kind of dry type hollow shunt reactor observation circuit according to claim 5, which is characterized in that described four are kept away
Thunder device monomer is all made of combined type Zinc-Oxide Arrester.
7. a kind of dry type hollow shunt reactor observation circuit according to claim 2, which is characterized in that the partial pressure
Device group includes three partial pressure branches, and every partial pressure branch includes two RC series circuits and two RC series circuit series aiding connections,
The resistance terminal of three partial pressure branches is separately connected the input terminal of three dry type hollow shunt reactor monomers, and described three points
Press the capacitance terminal ground connection of branch.
8. a kind of dry type hollow shunt reactor observation circuit according to claim 7, which is characterized in that sampling voltage U2
It is connected between two RC series circuits of every partial pressure branch.
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| CN201810886419.XA CN108922756A (en) | 2018-08-06 | 2018-08-06 | A kind of dry type hollow shunt reactor observation circuit |
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| CN201810886419.XA CN108922756A (en) | 2018-08-06 | 2018-08-06 | A kind of dry type hollow shunt reactor observation circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109709385A (en) * | 2019-01-15 | 2019-05-03 | 杭州银湖电气设备有限公司 | Magnet controlled reactor exciting current monitoring device and method based on Hall transformer |
| CN109900992A (en) * | 2019-03-29 | 2019-06-18 | 云南电网有限责任公司电力科学研究院 | A kind of dry-type air-core reactor layering current measurement system and method |
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