CN110474311A - Electronic type discharge coil - Google Patents
Electronic type discharge coil Download PDFInfo
- Publication number
- CN110474311A CN110474311A CN201810439049.5A CN201810439049A CN110474311A CN 110474311 A CN110474311 A CN 110474311A CN 201810439049 A CN201810439049 A CN 201810439049A CN 110474311 A CN110474311 A CN 110474311A
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- transformer
- electronic type
- circuit
- discharge coil
- discharge
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- 239000003990 capacitor Substances 0.000 claims abstract description 47
- 238000004804 winding Methods 0.000 claims abstract description 17
- 238000004146 energy storage Methods 0.000 claims description 4
- 210000004899 c-terminal region Anatomy 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
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- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to electronic type discharge coils.Its main circuit includes discharge circuit and take can circuit.Discharge circuit is by resistance R1, resistance R2With thyristor V1It is composed in series；Taking can electric routing transformer B1, transformer B2With isolating capacitor C1It is composed in series.± 5% 2 output voltage of the 100V of electronic type discharge coil is by transformer B1, transformer B2Secondary windings in series provide.Relay J1Normally opened contact J1‑1, diode D2, diode D3, resistance R8It is connected in series, forms thyristor V1DC trigger circuit.The present invention helps to reduce the no-load loss of discharge coil, improves the reliability of discharge coil and the accuracy of discharge time.
Description
Technical field
The present invention relates to discharge coils, specifically electronic type discharge coil.
Background technique
Discharge coil is that the main special-purpose assorted equipment of high-voltage parallel capacitor device is connected in parallel with capacitor.Work as capacitor
Device after power grid disconnection, released by discharge coil by the charge of storage, at the appointed time reduces capacitor residual voltage
To specified value hereinafter, safety to ensure capacitive means and maintenance personal.Although the structure of conventional discharge coil has resin to pour
Two class of formula and oil immersed type, but their body is all made of iron core and the winding being sleeved on iron core, structure and change
Depressor is similar, also once point of winding and secondary winding.First winding (or primary coil) using discharge coil is electricity
Container provides discharge path, and here it is the origin of " discharge coil " title.
When capacitor operates normally, being connected in parallel in the first winding of the discharge coil at capacitor both ends has alternating current circulation
It crosses, very high AC impedance is presented in discharge coil, the electric current very little of discharge coil first winding is flowed through, to the normal fortune of capacitor
Row does not influence；When electric system power-off, the charge of capacitor storage passes through the one of discharge coil in the form of decaying dc
The iron core of secondary winding, discharge coil is saturated rapidly under the action of DC current, and impedance significantly reduces, and stores capacitor
Charge can be released to rapidly specified value or less, it is ensured that the safety of capacitor device and maintenance personal.
Since the impedance of discharge coil first winding is influenced by factors such as discharge coil leakage reactances, value is difficult accurately to control
System, even so as to cause the no-load loss of discharge coil and the discharge coil of discharge time same size also have it is biggish from
Dissipate property.
Summary of the invention
The purpose of the present invention is to solve the above problem, provides a kind of electronic type discharge coil, wire resistor is used to make
For arresting element, influence it by alternating current or DC current, discharge time can accurately set, and improve discharge lines
The discharge time precision of circle, also improves the service life of discharge coil.
To solve the above-mentioned problems, The technical solution adopted by the invention is as follows:
Electronic type discharge coil, which is characterized in that its main circuit includes discharge circuit and take can circuit；
Discharge circuit includes wire resistor R1, wire resistor R2With thyristor V1;Resistance R1, resistance R2With thyristor V1Series connection；
Taking energy circuit includes transformer B1, transformer B2With isolating capacitor C1;Transformer B1, transformer B2With isolating capacitor C1
Series connection.± 5% 2 output voltage of the 100V of electronic type discharge coil is by transformer B1, transformer B2Secondary windings in series mention
For.Electronic type discharge coil works in discharge condition, by capacitor C1The decaying dc electric current that isolating capacitor C releases.
Optimization, relay normally open contact J1-1, diode D2With resistance R8Composition series connection gate pole DC trigger circuit, for brilliant lock
Pipe V1Gate trigger current is provided.Electronic type discharge coil is in discharge condition, thyristor V1Gate trigger current by filtered electrical
Container C2Energy storage provide.
Optimize, electronic type discharge coil working state indicating circuit, light emitting diode D are equipped in main circuit4With current limliting electricity
Hinder R6Relay J is connected in parallel on after series connection1Normally opened contact J1-1Front end, provide standby instruction for electronic type discharge coil, shine two
Pole pipe D5With current-limiting resistance R7Relay J is connected in parallel on after series connection1Normally opened contact J1-1Rear end provide and put for electronic type discharge coil
Electricity instruction.
Optimization, the transformer B of discharge coil1, transformer B2It is connected in series, transformer B1, transformer B2Parameter is identical, makes
Transformer B1With transformer B2End voltage be reduced to the 1/2 of capacitor C-terminal voltage.
The working principle of the invention
For convenient for narration, the working condition of electronic type discharge coil of the present invention is divided into standby mode and two kinds of discharge condition
Mode.
Standby mode
When capacitor C stable operation, relay J1It is attracted, normally-closed contact J1-1Switch to ON state, thyristor V1The direct current of gate pole touches
Power generation stream is cut off, thyristor V1Cut-off, by resistance R1, resistance R2The discharge circuit of composition is in open-circuit condition, flows through the electric discharge
The electric current of circuit is zero, and electronic type discharge coil is in standby.
Discharge condition
When power supply system power-off or capacitor C are disconnected from power grid, because the discharge current of capacitor C is a decaying dc, the electric current
By capacitor C1Barrier, transformer B1, transformer B2First winding there is no alternating current to pass through, first winding, it is secondary around
Electromagnetic induction between group disappears, and the 100V ac output voltage of secondary winding also disappears immediately, relay J1It is discharged because of power loss,
Its normally-closed contact J1-1Closure, filter capacitor C2Make thyristor V using the energy of storage1Triggering and conducting, resistance R1With resistance R2Group
At discharge circuit be switched on, capacitor C is discharged by the discharge circuit.Discharge coil is in discharge condition at this time.
In the discharged condition, thyristor V1It is equivalent to control switch, because its work is in DC circuit, once triggering and conducting
On-state can be maintained losing trigger signal, until the residual voltage at the both ends capacitor C is less than the maintenance voltage of thyristor
Thyristor V1Just automatic cut-off.In thyristor V1During conducting, the requirement to gate pole trigger signal duration be it is of short duration, only
Want filter capacitor C2Capacitance choose it is proper, energy storage can satisfy thyristor V completely1Triggering requirement.
Compared with existing common discharge coil, the beneficial features of electronic type discharge coil of the present invention:
(1) electronic type discharge coil does not have electric current in discharge circuit in standby mode since discharge circuit is in open-circuit condition
Pass through, flows through the capacitor C for taking energy circuit1, transformer B1, transformer B2Alternating current be less than 20mA, facilitate reduce electric discharge
The no-load loss of coil.
(2) reliability of discharge coil and the accuracy of discharge time are improved as arresting element using resistance.
(3) electronic type discharge coil structure is simple, easily fabricated, and the consistency of product parameters is good.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Detailed description of the invention:
Fig. 1 is the circuit topology of electronic type discharge coil described in specific embodiment one；
Fig. 2 is the circuit topology of electronic type discharge coil described in specific embodiment two.
Specific embodiment
The preferred embodiment of the present invention is described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
It should be noted that the reactor L and capacitor C in Figure of description 1 and attached drawing 2 are that power transmission and transformation system is used to mend
The special equipment of reactive power is repaid, they are not belonging to the scope of this patent, only to facilitate illustrating electronic type discharge coil
Function just comes out reactor L and capacitor C shown in the figure.
Specific embodiment one:
Refering to shown in Figure of description 1, electronic type discharge coil, which is characterized in that its main circuit includes discharge circuit and takes energy
Circuit；
Discharge circuit includes wire resistor R1, resistance R2With thyristor V1, resistance R1, resistance R2With thyristor V1Form discharged in series
Circuit；
Taking energy circuit includes transformer B1, transformer B2With isolating capacitor C1, transformer B1, transformer B2With isolating capacitor C1
Series connection, bis- output voltages of 100V of electronic type discharge coil are by transformer B1, transformer B2Secondary windings in series provide.
The discharge circuit of the electronic type discharge coil of this specific embodiment takes energy circuit topology to be connected in parallel on capacitor C's
Both ends constitute two current branch.Discharge paths are by resistance R1, resistance R2With thyristor V1It is composed in series.Discharge coil work exists
When standby mode, thyristor V1Cut-off, discharge paths open circuit, advantageously reduces the no-load current of electronic type discharge coil；Take energy
Electric routing transformer B1, transformer B2With capacitor C1It is composed in series.Capacitor C1Decaying when for isolating capacitor C electric discharge
DC current prevents transformer B1With transformer B2Iron core saturation.
Specific embodiment two:
Electronic type discharge coil is characterized mainly in that its main circuit includes discharge circuit and take can circuit；
Discharge circuit includes resistance R1, resistance R2With thyristor V1, resistance R1, resistance R2With thyristor V1Series connection；Thyristor V1Make
For electronic switch use, the on-off of discharge circuit is controlled, and then controls the working condition of electronic type discharge coil；Relay J1's
Normally opened contact J1-1, diode D2, diode D3With resistance R8Form thyristor V1Gate pole DC trigger circuit, electronic type electric discharge
Coil working is in discharge condition, thyristor V1Gate pole DC trigger circuit trigger current by filter condenser C2Energy storage
It provides.
Taking energy circuit includes transformer B1, transformer B2With isolating capacitor C1, transformer B1, transformer B2And isolation capacitance
Device C1Series connection, ± 5% 2 output voltage of 100V of electronic type discharge coil is by transformer B1, transformer B2Secondary windings in series
It provides；Electronic type discharge coil works in discharge condition, by capacitor C1The decaying dc electricity that isolation compensation capacitor C releases
Stream prevents from taking energy transformer B1, transformer B2Iron core saturation.
Electronic type discharge coil working state indicating circuit, light emitting diode D are equipped in electronic type discharge coil main circuit4
With current-limiting resistance R6Relay J is connected in parallel on after series connection1Normally opened contact J1-1Front end, provide standby finger for electronic type discharge coil
Show, light emitting diode D5With current-limiting resistance R7Relay J is connected in parallel on after series connection1Normally opened contact J1-1Rear end be electronic type discharge lines
Circle provides electric discharge instruction.
Electronic type discharge coil takes the transformer B in energy circuit1, transformer B2Using concatenated working method, make any one
The end voltage of transformer is all reduced to the 1/2 of capacitor C-terminal voltage, and then reduces the difficulty of processing of transformer.Specification is attached
Capacitor C in Fig. 21It is the isolating capacitor for isolated DC.When discharge coil work in discharge condition, capacitor C
Discharge current be decaying direct current, which cannot pass through capacitor C1, it is equivalent to by capacitor C1Barrier, make
It can only be from resistance R1, resistance R2With thyristor V1Pass through in the discharge circuit of composition, prevents transformer B1, transformer B2It is primary
Because there is DC current by causing iron core to be saturated in winding, the design difficulty of discharge coil is advantageously reduced, and help to improve
The electric discharge precision of discharge coil.
There are also resistance R for electronic component involved in electronic type discharge coil described in Figure of description 23、R4、R5、R9, electricity
Container C3、C4, diode D1、D3, varistor MOV, wherein resistance R3、R4And diode D1It is thyristor V1Gate trigger circuit
Constituent element.Resistance R3With R4It is connected in series and forms series voltage divider, by transformer B250V output voltage partial pressure be 12V it is low
Voltage, then through diode D connected in series1Halfwave rectifier is as thyristor V1Direct current trigger power supply, resistance R5With capacitor C3
Form relay J1Buffer circuit, guarantee relay J1It can reliably be attracted, resistance R9With capacitor C4Form thyristor V1Buffering
Circuit, to thyristor V1Implement voltage protection.Varistor MOV is to take can transformer B1、B2Overvoltage protection is provided.Diode D3
For thyristor V1Gate pole and its trigger circuit provide voltage protection.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
For personnel it should be appreciated that the present invention is not limited to the above embodiments, the description in above embodiments and description is only the present invention
Preference, the present invention do not limited by above-mentioned preference, without departing from the spirit and scope of the present invention, the present invention
Can also there are various changes and modifications, these changes and improvements are both fallen in the scope of protection of present invention.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (4)
1. electronic type discharge coil, which is characterized in that its main circuit includes discharge circuit and take can circuit；
Discharge circuit includes wire resistor R1, resistance R2With thyristor V1;
Resistance R1, resistance R2With thyristor V1Series connection；
Taking energy circuit includes transformer B1, transformer B2With isolating capacitor C1, transformer B1, transformer B2With isolating capacitor C1
Series connection;
± 5% 2 output voltage of the 100V of electronic type discharge coil is by transformer B1, transformer B2Secondary windings in series provide.
2. electronic type discharge coil according to claim 1, which is characterized in that relay J1Normally opened contact J1-1, two poles
Pipe D2, diode D3, resistance R8Composition series connection trigger circuit, is thyristor V1Gate pole direct current trigger current is provided, electronic type puts
Electric coil is in discharge condition, thyristor V1The trigger current of gate pole is by filter condenser C2Energy storage provide.
3. electronic type discharge coil according to claim 1, which is characterized in that be equipped with electronic type discharge coil work in circuit
Make condition indication circuit, light emitting diode D4With current-limiting resistance R6Relay J is connected in parallel on after series connection1Normally opened contact J1-1Front end,
Standby instruction, light emitting diode D are provided for electronic type discharge coil5With current-limiting resistance R7Relay J is connected in parallel on after series connection1It is normally opened
Contact J1-1Rear end for electronic type discharge coil provide electric discharge instruction.
4. electronic type discharge coil according to claim 1, which is characterized in that discharge coil takes the transformer in energy circuit
B1, transformer B2It is connected in series, transformer B1, transformer B2Parameter is identical, makes transformer B1With transformer B2End voltage reduce
It is the 1/2 of capacitor C-terminal voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810439049.5A CN110474311A (en) | 2018-05-09 | 2018-05-09 | Electronic type discharge coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810439049.5A CN110474311A (en) | 2018-05-09 | 2018-05-09 | Electronic type discharge coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110474311A true CN110474311A (en) | 2019-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810439049.5A Pending CN110474311A (en) | 2018-05-09 | 2018-05-09 | Electronic type discharge coil |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004096864A (en) * | 2002-08-30 | 2004-03-25 | Meidensha Corp | Discharging device for capacitor |
| CN201985516U (en) * | 2011-01-28 | 2011-09-21 | 广州高澜节能技术股份有限公司 | Isolation device for restraining high-tension transformer neutral point direct current by serial capacitance |
| CN103529345A (en) * | 2013-09-23 | 2014-01-22 | 国家电网公司 | Substation 35kV capacitor discharge coil operating state monitoring method and device |
| CN204143988U (en) * | 2014-10-31 | 2015-02-04 | 山东金人电气有限公司 | A kind of discharge coil |
| CN105842556A (en) * | 2016-03-03 | 2016-08-10 | 国网浙江省电力公司电力科学研究院 | Single-phase parallel capacitor-discharge coil discharge process calculation method |
| CN208174265U (en) * | 2018-05-09 | 2018-11-30 | 丹东德元电力电器有限公司 | Electronic type discharge coil |
-
2018
- 2018-05-09 CN CN201810439049.5A patent/CN110474311A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004096864A (en) * | 2002-08-30 | 2004-03-25 | Meidensha Corp | Discharging device for capacitor |
| CN201985516U (en) * | 2011-01-28 | 2011-09-21 | 广州高澜节能技术股份有限公司 | Isolation device for restraining high-tension transformer neutral point direct current by serial capacitance |
| CN103529345A (en) * | 2013-09-23 | 2014-01-22 | 国家电网公司 | Substation 35kV capacitor discharge coil operating state monitoring method and device |
| CN204143988U (en) * | 2014-10-31 | 2015-02-04 | 山东金人电气有限公司 | A kind of discharge coil |
| CN105842556A (en) * | 2016-03-03 | 2016-08-10 | 国网浙江省电力公司电力科学研究院 | Single-phase parallel capacitor-discharge coil discharge process calculation method |
| CN208174265U (en) * | 2018-05-09 | 2018-11-30 | 丹东德元电力电器有限公司 | Electronic type discharge coil |
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