CN107887889A - For quickly changing the transient reactance device of AC network middle impedance value - Google Patents
For quickly changing the transient reactance device of AC network middle impedance value Download PDFInfo
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- CN107887889A CN107887889A CN201710873758.XA CN201710873758A CN107887889A CN 107887889 A CN107887889 A CN 107887889A CN 201710873758 A CN201710873758 A CN 201710873758A CN 107887889 A CN107887889 A CN 107887889A
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- 230000001052 transient effect Effects 0.000 title claims abstract description 18
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 230000008859 change Effects 0.000 claims abstract description 16
- 229910052742 iron Inorganic materials 0.000 claims abstract description 9
- 230000007257 malfunction Effects 0.000 claims abstract description 4
- 230000005291 magnetic effect Effects 0.000 claims description 18
- 238000004804 winding Methods 0.000 claims description 15
- 238000009413 insulation Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 8
- NJFMNPFATSYWHB-UHFFFAOYSA-N ac1l9hgr Chemical group [Fe].[Fe] NJFMNPFATSYWHB-UHFFFAOYSA-N 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000004870 electrical engineering Methods 0.000 abstract description 3
- 230000008092 positive effect Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 10
- 230000033001 locomotion Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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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
- H01F27/28—Coils; Windings; Conductive connections
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The present invention relates to a kind of transient reactance device for being used to quickly change AC network middle impedance value.It is an object of the invention to provide a kind of simple in construction, rapid reaction, safe and reliable, usually running wastage is small and the transient reactance device for being used for quick change AC network middle impedance value of the current limliting positive effect when short trouble occurs.The technical scheme is that：Kind is used for the transient reactance device for quickly changing AC network middle impedance value, it is characterised in that has：Air reactor；Moving armature core, corresponds with air reactor and sets, and initial position is located at outside the air reactor；Actuating mechanism, iron core-closed reactor is formed for being sent into the moving armature core in the air reactor from initial position according to relay protection signal；Resetting-mechanism, the moving armature core is sent back to initial position after being eliminated for short circuit malfunction.The present invention is applied to electrical engineering automatic protection control field.
Description
Technical field
The present invention relates to a kind of transient reactance device for being used to quickly change AC network middle impedance value.Suitable for electrical engineering
Automatic protection control field.
Background technology
As net capacity constantly increases in modern power network, power network short circuit currents already exceed 80kA, but current state
In the fertile most of primary cut-out of institute of inside and outside power equipment manufacturer, voltage class is specified 500kV and the above
Short circuit current is general only in below 63kA, and in low-voltage apparatus breaker, short circuit current also alreadys exceed 200kA, still, often
Rule low-voltage circuit breaker the ability for cut-offfing short circuit current be only 100kA level, this ability be difficult meet system needs cut-off compared with
The requirement of big short circuit current.Continuous expansion and on national network continuous reinforcement with net capacity, this contradiction can be increasingly
It is prominent.Can solve the problems, such as the suppression of grid short circuit electric current although with the method for changing electric network composition, but compromise electricity simultaneously
The flexibility of network operation and economy, particularly as used for large-scale ships power system concentrated load requirement when, can not be with
The mode of disjunction is run, and otherwise can not just carry out the operation of high-power load.Therefore, to limit system using quick reactor short
Road fault current has turned into the very urgent technical problem faced in modern power network development, and this is to quick reactor
First kind demand occasion.
With super-pressure and extra-high voltage grid construction and development, for longer transmission line of electricity, in order to limit power frequency and behaviour
Make overvoltage, it is necessary to configure high-voltage shunt reactor on the line, but conventional high-voltage shunt reactor is unadjustable, works as circuit
Transmission power access expansion power or convey bigger electric power when, if can not adjust and exit for shunt reactor, will cause be
Voltage of uniting reduces, and influences electricity net safety stable level and the quality of power supply.Therefore, it is also urgently to need fast electric to this occasion
Anti- device device.
To solve the above problems, need it is a kind of it is simple in construction, increments of change is big, using reliable, rapidly moved (in 5ms)
State compensates electrical network parameter, ensures power grid security, the quick varactor device of stable operation.
Usual power network to quick variable reactor to limit electric network fault when short circuit current in requirement it is as follows：
(1) during normal operation, current-limiting apparatus is in Low ESR or zero impedance state, and the active power and reactive power of system are damaged
Consume it is small, custom requirements power attenuation be less than 0.25% specified transmission capacity, system is had no effect (pressure drop zero)；
(2) after failure occurs, device (in 0.02 second, i.e. 20ms, sometimes requiring that 5ms) should be able to act in very short time,
Effective limiting short-circuit current before fault current reaches first peak value；
(3) side effects such as system transient modelling vibration, overvoltage are not caused when acting；
(4) the correct action of the equipment such as relay protection is not influenceed；
(5) device has auto-reset function and multiple continuous action ability；
(6) cost of equipment and operating cost are low, the volume and weight that can be born, and reliability is high, easy maintenance.
Found from scholar in 1916, after the saturable reactor based on magnetic amplifier principle, existing varactor device with
Magnetic saturation reactor is that principle is realized, now many Industry Control places, used using the principle as in alternating current circuit can
Become the electrical equipment of reactance, wherein more typical patent is：
1st, " jump reactance current limiter " of Wuhan University's Luo Dechang et al., number of patent application 200810046948.5；
2nd, " a kind of magnetic saturation type single-phase controllable reactor " of CAS Electrical Engineering Research Institute's Zhang Guoqiang, number of patent application
201110044168.9；
3rd, " a kind of single-phase controllable transducer " patent of the research institute's Liu Jin rising suns of China Shipbuilding Industry Corporation the 712nd
Application number 201120276311.2；
4th, " AC step controlled parallel reactor device " of Western China Anxi piezoelectric transformer Co., Ltd, number of patent application
200510096007.9。
The common feature of technical method in above patent is, by two coils (being main coil and demagnetization magnetic coil respectively)
It is placed on a certain iron core bridge arm of secured core body, such result can be when main circuit current be by main coil L1, in iron
Very big magnetic hystersis loss is produced in core body.And in the prior art mostly with by adjusting the electric current phase in secondary coil i.e. anti-magnetized coil
Position and amplitude offset the magnetic potential in main coil, if F1=N1I1For main coil magnetic potential in Practical Project, if it is desired to produce this
The anti-magnetic potential of individual energy value, will consume very big energy, i.e. F1=F2=N2I2(ampere-turn), because only that producing substantially equivalent
Antiphase magnetic potential could effectively offset the magnetic potential i.e. number of ampere turns as caused by main coil, otherwise, will be on main coil
Reveal larger reactance value XL1, therefore, in original technical system from the point of view of the actual longtime running angle of engineering, it will produce
The wasting phenomenon of huge ferromagnetic loss, it is contemplated that attrition inventory quantity is up to 5%~10% reactive loss, what this was asked needed for engineering
Quick current-limiting reactor differs greatly in 0.25% level being lost, defined requirement.That is, existing magnetic saturation reactor
There is the loss of huge electromagnetic energy in operation.Therefore short-term operation, and load are only applicable to using magnetic saturation reactor
Little place application is measured, can not be applied in the power system under high-power loading condiction for a long time, year in year out a large amount of
The performance number of loss electric flux can make general user can not bear its loss economically.
The content of the invention
The technical problem to be solved in the present invention is：For above-mentioned problem, there is provided a kind of simple in construction, reaction is soon
Speed, it is safe and reliable, usually running wastage it is small and when short trouble occurs current limliting positive effect be used for quick change alternating current
The transient reactance device of net middle impedance value.
The technical solution adopted in the present invention is：A kind of transient reactance for being used to quickly change AC network middle impedance value
Device, it is characterised in that have：
Air reactor；
Moving armature core, corresponds with air reactor and sets, and initial position is located at outside the air reactor；
Actuating mechanism, for the moving armature core to be sent into the hollow electricity from initial position according to relay protection signal
Iron core-closed reactor is formed in anti-device；
Resetting-mechanism, the moving armature core is sent back to initial position after being eliminated for short circuit malfunction.
The actuating mechanism is for the electromagnet for wicking into the moving armature in the air reactor, the electromagnetism
The electronic power switching circuit that the magnet coil of iron drives via relay protection signal connects power supply.
The magnet coil of the electromagnet and the electronic power switch and the power supply, and by the moving armature core
The travel switch of shake-up concatenates to form loop, and wherein travel switch is arranged at the moving armature core by initial position to hollow electricity
The stroke centre position of iron core reactor is formed in anti-device.
The electronic power switch is using IGCT either IGBT fast power electronic switches.
The resetting-mechanism has spring.
The moving armature core is T-shaped moving armature core, and the electromagnet has magnet coil and the fixed magnetic of Qian font
Iron iron core, the T-shaped moving armature core center moving up and down for being plugged in the fixed pole core of Qian font, Qian font are consolidated
The insulation sleeve I and insulation sleeve II coaxial with T-shaped moving armature core are provided with fixed pattern pole core, the electricity is wound with insulation sleeve I
Magnetic coil, insulation sleeve II are wound with the reactor line as the air reactor according to can bear high-tension insulating Design
Circle；
It is provided between the fixed pole core upper end of Qian font and T-shaped moving armature core as the resetting-mechanism
Spring；
When the electromagnet is not powered on, T-shaped moving armature core is located at original state, T-shaped moving armature core under original state
Leave primary clearance between lower end and the fixed pole core of Qian font, the reactor winding to should primary clearance set；
The T-shaped moving armature core of electromagnetic attracting force is produced when the magnet coil of electromagnet is powered, T-shaped moving armature core lower end passes through reactance
Device coil contacts the iron core body loop for forming closure with the fixed pole core of Qian font.
When the T-shaped moving armature core lower end contacts with the fixed pole core of Qian font, the fixed magnet iron of Qian font
Small―gap suture is left between core upper end and T-shaped moving armature core top.
The T-shaped moving armature core and/or the fixed pole core of Qian font are provided with made of non-magnet material, used
In the guiding mechanism that guiding is moved up and down for T-shaped moving armature core.
The moving armature core is L-type moving armature core, and the electromagnet has magnet coil and the fixed magnetic of Contraband font
Iron iron core, wherein one end of L-type moving armature core are pivotally mounted to one end of the fixed pole core of Contraband font through rotating shaft, electricity
Magnetic coil is around on the fixed pole core of Contraband font；
The bullet as the resetting-mechanism is provided between the fixed pole core of the Contraband font and L-type moving armature core
Spring；
When the electromagnet is not powered on, L-type moving armature core is located at original state, L-type moving armature core under original state
Remote rotating shaft end and the fixed pole core of Contraband font remote rotating shaft end between leave primary clearance, to should primary clearance
The air reactor is set；Magnet coil be powered when, electromagnet attract L-type moving armature core, L-type moving armature core it is remote
Rotating shaft end contacts the electromagnet for forming an openning type structure through air reactor with the fixed pole core of Contraband font.
The beneficial effects of the invention are as follows：
The present invention is connected by air reactor in power network normal operation and accesses power network, air reactor is in power network
Energy loss is smaller；When short trouble occurs for power network, moving armature is wicked according to relay protection signal drive actions mechanism
Enter in air reactor, so as to which the air reactor for accessing power network is changed into iron core reactor, so that reactance value XLIt is anxious
Increase severely big.Iron core reactor can also absorb and dissolve the energy as caused by short circuit current in a large amount of loops simultaneously, so as to
Reach the purpose of current limliting.
The present invention is used by controlling reactor winding to may also function as application of the shunt reactor in terms of reactive-load compensation
The function of the shunt reactor of compensating electric capacity electric current uses in HV ＆ long transmission line.
Moving armature core can be sent into air reactor by actuating mechanism from initial position in the present invention, work as short trouble
After disappearance, then by resetting-mechanism send moving armature core back to initial position out of air reactor, have auto-reset function and
Multiple continuous action ability.
Actuating mechanism is used based on relay protection signal to start the electromagnet of work in the present invention so that electromagnet reacts
Rapidly, the moment of short circuit current can be produced in primary circuit, suction is produced to moving armature core, moving armature is wicked into sky
Core device and form iron core reactor.Because short circuit current acts on, by the caused electromagnetic attraction of air reactor coil in itself
Power can also attract moving armature to act, and make a concerted effort so as to be formed with electromagnet, to realize quick formation iron core reactor.
Brief description of the drawings
Structural representation when Fig. 1 is 1 normal operation of embodiment.
Fig. 2 is Fig. 1 sectional view.
Structural representation when Fig. 3 is 1 short trouble of embodiment.
Fig. 4 is Fig. 3 sectional view.
Fig. 5 is the structural representation of embodiment 2.
101st, T-shaped moving armature core；102nd, L-type moving armature core；201st, the fixed pole core of Qian font；202nd, Contraband word
The fixed pole core of shape；3rd, magnet coil；4th, air reactor, 5, insulation sleeve I；6th, insulation sleeve II；7th, guide plate；8th, bullet
Spring；9th, travel switch；10th, power supply；11st, electronic power switch；12nd, primary clearance.
Embodiment
Embodiment 1：As shown in Figure 1 to 4, the present embodiment is a kind of wink for being used to quickly change AC network middle impedance value
Become reactor, be made up of air reactor, moving armature core, actuating mechanism and resetting-mechanism.
Wherein actuating mechanism is electromagnet, and the electromagnet is by the fixed pole core 201 of Qian font and is arranged at Qian font
The magnet coil 3 in fixed pole core centre position forms, and magnet coil 3 is around in pole core 201 fixed with Qian font
On the coaxial insulation sleeve I 5 in axis.Moving armature core uses T-shaped moving armature core 101, and T-shaped moving armature core is consolidated along Qian font
Fixed pattern pole core axis is arranged and lower end insertion insulation sleeve I 5, the T-shaped moving armature core top and the fixed magnetic of Qian font
It is connected between iron iron core upper end with the spring 8 as resetting-mechanism.
The fixed pole core 201 of Qian font and magnet coil 3 form the electromagnet as actuating mechanism in the present embodiment,
The electronic power switch 11 (this example uses IGCT) that magnet coil 3 drives with power supply 10 and by relay protection signal, which concatenates, to be formed
Solenoid actuated control loop.Purpose using electronic power switch 11 is to improve the time rapidity of switch motion, several
The actuation time of microsecond.
When not turned in this example in magnet control loop, when the magnet coil 3 of electromagnet is not powered on, now T types activity
Armature core 101 is located at original state in the presence of spring 8.T-shaped moving armature core lower end is fixed with Qian font under original state
Primary clearance 12 is left between formula pole core, to should primary clearance the insulation sleeve II 6 coaxial with insulation sleeve I 5 is set, insulate
Cover and reactor winding is wound with II 6, because T types moving armature core is not in the range of reactor winding under original state, therefore first
Reactor winding can be used as in the series connection access power network of air reactor 4 and run during beginning state.
When short trouble occurs, magnet control loop conducting, the magnet coil 3 of electromagnet is powered, and is inhaled in electromagnet
T-shaped moving armature core 101 overcomes the elastic force of spring 8 to move down in the presence of power, fixed through reactor winding and Qian font
Pole core is contacted, and forms the closed-loop path of iron-core workpiece, and T-shaped moving armature core, reactance are now inserted in reactor winding
Device coil is as iron core reactor reactance value XLIt increased dramatically, access power network makes short circuit current drastically decline.
After T-shaped moving armature core 101 inserts reactor winding, reactor winding and magnet coil 3 are placed on T-shaped activity
On armature core, that is, transformer device structure is formed, it is too high and damage electrical equipment to easily cause magnet control loop voltage.To avoid damaging
The electrical equipment in bad magnet control loop, this example concatenate travel switch 9 in magnet control loop, and the trip switch is set
In the fixed pole core upper end of Qian font, positioned at the midway that T type moving armature cores move down, touched by T-shaped moving armature core
It is dynamic.Travel switch 9 is after the shake-up of T-shaped moving armature core so that the control loop of electromagnet magnet coil 3 is in open-circuit condition, is avoided
Electrical components are damaged.
When the T-shaped lower end of moving armature core 101, pole core 201 fixed with Qian font contacts, on T-shaped moving armature core
A small―gap suture is still left between portion and the fixed pole core upper end of Qian font, it is therefore an objective to is made after preventing iron-core workpiece saturation
The problem of reactance value drastically diminishes is obtained, after so T-shaped moving armature wicking is closed, is not still closed completely, therefore the iron core formed
Reactor is band GAP TYPE iron core reactor.
Being connected to auxiliary in the present embodiment on T-shaped moving armature core, it is moved down along the fixed pole core axis of Qian font
Dynamic guiding mechanism, the guiding mechanism are connected on T-shaped moving armature core for two pieces and guide plate 7 are made by non-magnet material (copper),
Two guide plates coordinate the guide groove restricted T type moving armature core on the fixed pole core of T-shaped moving armature core lower end Qian font
It can only be moved up and down along the fixed pole core axis of Qian font.
The operation principle of the present embodiment is as follows：
During grid collapses, short circuit current flows through air reactor 4, while relay protection signal driving power electronics is opened
11 conductings are closed, so that magnet control loop turns on；
After the conducting of magnet control loop, the magnet coil 3 of electromagnet, which is powered, produces suction, meanwhile, the suction of electromagnet
Merge with the two power of suction as caused by air reactor 4 is flowed through during short circuit current, together attract T-shaped moving armature core from
Initial position is toward quickly moving in air reactor；
T-shaped moving armature core shift motion midway touching travel switch 9, magnet control loop disconnect, and make magnet coil 3
In the state of cut-offfing, electromagnet dead electricity, it is therefore an objective to prevent the secondary coil short-circuit condition of transformer state and influence reactance value reduction,
And lose current limitation effect；
T-shaped moving armature core continues in the presence of suction caused by air reactor 4 and inertia toward air reactor
Interior movement, until T-shaped moving armature core insertion air reactor forms the iron core reactor in flux closure loop；
After short circuit malfunction eliminates, short circuit current disappears, and the electric current on reactor winding declines, under caused suction
Drop, now T-shaped moving armature core returns to initial position in the presence of the spring 8 of resetting-mechanism.
The number of turn of magnet coil 3 of electromagnet and the electric current of process are to meet suction caused by the electromagnet in the present embodiment
T-shaped moving armature can be wicked into air reactor in 5ms and is configured by suction caused by power cooperation reactor winding.
Accessing on the air reactor of power network the apparent energy consumed in the present embodiment under power network normal operating condition is：
When short trouble occurs, short circuit current IDIt is electric current I under power network normal conditioneN times, under the conditions of identical coil, iron
The reactance value X of core reactortIt is air reactor reactance value XkM times, the apparent energy that short circuit is is：
The apparent energy ratio K under apparent energy and normal operation when short-circuit is：
, can more than enough absorption about N after air reactor is converted to iron core reactor state in moment in the present embodiment2M times
The short circuit energy of power, greatly reduces short circuit current, and current limitation effect is fairly obvious.
The present embodiment is being applied to the powerful reactor of high-voltage fence in use, then can be with hundreds of energy absorbers simultaneously
The method that connection, tens energy absorbers are connected is to carry out shunt current, the mode of branch pressure voltage is realized, depending on voltage of power network etc.
Rated current Ie in level and specific circuit specifically to carry out engineering calculation, but is diverted to each unit energy absorber with conversion
For basic component value, this is just as the principle of the series connection in parallel to numerous resistance is.
Embodiment 2：As shown in figure 5, the present embodiment is the two of quick reactor purposes：One kind is used to compensate HV ＆ long transmission line
Capacitance current and set shunt reactor application scene, the quick reactor of controllable type, by air reactor 4, moving armature
Core, actuating mechanism and resetting-mechanism composition.
Wherein actuating mechanism is electromagnet, and the electromagnet is by the fixed pole core 202 of Contraband font and is around in Contraband font and consolidates
Magnet coil 3 on fixed pattern pole core forms.Moving armature core uses L-type moving armature core 102, the L-type moving armature core
One end one end of the fixed pole core of Contraband font is pivotally mounted to through rotating shaft.L type moving armature cores are fixed with Contraband font
It is connected between formula pole core through the spring 8 as resetting-mechanism.
The fixed pole core of Contraband font and magnet coil form the electromagnet as actuating mechanism, electromagnetism in the present embodiment
Coil 3 is gone here and there with power supply 10 and by the electronic power switch 11 of automatic detection signal or manual actuation (this example uses IGCT)
Connect to form solenoid actuated control loop.
When electronic power switch 11 in this example in magnet control loop does not turn on, the magnet coil 3 of electromagnet is not
It is powered, now L-type moving armature core 102 is located at original state in the presence of spring 8.L-type moving armature core under original state
Remote rotating shaft end and the fixed pole core 202 of Contraband font remote rotating shaft end between leave primary clearance, to should be initial
Gap setting air reactor 4.In the electrical primary major loop that air reactor series connection access needs are protected.
When customer charge decline, it is necessary to when increasing the reactance value of reactor, by the conducting of the control loop of electromagnet coil 3, electricity
Magnet is powered, the L-type activity rank in the presence of the dual attraction for the load current that electromagnet suction and air reactor 4 flow through
The remote rotating shaft end of iron core overcomes spring force quickly to draw close movement, L to the remote rotating shaft end of the fixed pole core of Contraband font
The remote rotating shaft end of type moving armature core contacts to form openning type knot through air reactor with the fixed pole core of Contraband font
Structure, L-type moving armature core is now inserted in air reactor, air reactor is changed into iron core reactor, and reactance value is drastically
Increase, after L-type moving armature core inserts air reactor, the reactor winding of air reactor and the electromagnetic wire of actuating mechanism
Circle forms transformer device structure, and it is too high and damage electrical equipment to easily cause magnet control loop voltage.To avoid damaging electromagnet
The electrical equipment of control loop, this example concatenate travel switch 9 in magnet control loop, and the trip switch is arranged at Contraband font
On fixed pole core, mobile midway is drawn close to the fixed pole core of Contraband font positioned at L-type moving armature core, by L-type
Moving armature core touches.For travel switch after the shake-up of L-type moving armature core, magnet control loop is in open-circuit condition.
The operation principle of the present embodiment is as follows：
When load rapid decrease for some reason in power network, it is necessary to quickly put into reactor, now driven by detection signal loop
Electronic power switch turns on, so that the control loop conducting of magnet coil 3；
Magnet control loop conducting after, by the magnet coil 3 of electromagnet be powered produce suction, the suction of electromagnet with it is short
Road electric current flows through caused two suction merging of suction during air reactor 4 and together attracts the remote of L-type moving armature core 102
Movement is quickly drawn close in rotating shaft end to the remote rotating shaft end of the fixed pole core of Contraband font；
L-type moving armature core shift motion midway touching travel switch, the loop of electromagnet magnet coil 3 disconnect, electromagnetism
Iron dead electricity；
L-type moving armature core is by short circuit current IDFlow through in the presence of suction caused by air reactor and inertia after
Continue toward moving in air reactor, until L-type moving armature core insertion air reactor and form the structure shape of iron core reactor
State, so as to substantially increase reactance value XLPurpose.
Claims (9)
1. a kind of transient reactance device for being used to quickly change AC network middle impedance value, it is characterised in that have：
Air reactor (4)；
Moving armature core, corresponds with air reactor (4) and sets, and initial position is located at outside the air reactor；
Actuating mechanism, for the moving armature core to be sent into the air reactor from initial position according to relay protection signal
(4) iron core-closed reactor is formed in；
Resetting-mechanism, the moving armature core is sent back to initial position after being eliminated for short circuit malfunction.
2. the transient reactance device according to claim 1 for being used to quickly change AC network middle impedance value, it is characterised in that：
The actuating mechanism is the electromagnet for the moving armature to be wicked into the air reactor (4), the electromagnet
Electronic power switch (11) circuit that magnet coil (3) drives via relay protection signal connects power supply (10).
3. the transient reactance device according to claim 2 for being used to quickly change AC network middle impedance value, it is characterised in that：
The magnet coil (3) of the electromagnet and the electronic power switch (11) and the power supply (10), and held in the mouth by the activity
Travel switch (9) concatenation that iron core touches forms loop, and wherein travel switch is arranged at the moving armature core by initial position
The stroke centre position of iron core reactor is formed in air reactor (4).
4. the transient reactance device according to claim 3 for being used to quickly change AC network middle impedance value, it is characterised in that：
The electronic power switch (11) is using IGCT either IGBT fast power electronic switches.
5. the transient reactance device for being used to quickly change AC network middle impedance value according to claim 3 or 4, its feature exist
In：The resetting-mechanism has spring (8).
6. the transient reactance device according to claim 5 for being used to quickly change AC network middle impedance value, it is characterised in that：
The moving armature core is T-shaped moving armature core (101), and the electromagnet has magnet coil (3) and the fixed magnetic of Qian font
Iron iron core (201), the T-shaped moving armature core center moving up and down for being plugged in the fixed pole core of Qian font, Qian
The insulation sleeve I (5) and insulation sleeve II (6) coaxial with T-shaped moving armature core are provided with the fixed pole core of font (201), absolutely
The magnet coil (3) is wound with edge set I, the reactor winding as the air reactor (4) is wound with insulation sleeve II；
It is provided between the fixed pole core of Qian font (201) upper end and T-shaped moving armature core and is used as the resetting-mechanism
Spring (8)；
When the electromagnet is not powered on, T-shaped moving armature core is located at original state, T-shaped moving armature core lower end under original state
Leave primary clearance (12) between the fixed pole core of Qian font, the reactor winding to should primary clearance set；
The T-shaped moving armature core of electromagnetic attracting force is produced when the magnet coil (3) of electromagnet is powered, T-shaped moving armature core lower end passes through
Reactor winding contacts the iron core body loop for forming closure with the fixed pole core of Qian font.
7. the transient reactance device according to claim 6 for being used to quickly change AC network middle impedance value, it is characterised in that：
When the T-shaped moving armature core lower end contacts with the fixed pole core of Qian font (201), on the fixed pole core of Qian font
Small―gap suture is left between end and T-shaped moving armature core top.
8. the transient reactance device for being used to quickly change AC network middle impedance value according to claim 6 or 7, its feature exist
In：The T-shaped moving armature core and/or the fixed pole core of Qian font (201) are provided with made of non-magnet material, used
In the guiding mechanism that guiding is moved up and down for T-shaped moving armature core (101).
9. the transient reactance device according to claim 5 for being used to quickly change AC network middle impedance value, it is characterised in that：
The moving armature core is L-type moving armature core (102), and the electromagnet has magnet coil (3) and the fixed magnetic of Contraband font
Iron iron core (202), wherein one end of L-type moving armature core (102) are pivotally mounted to the fixed magnet iron of Contraband font through rotating shaft
One end of core (202), magnet coil (3) are around on the fixed pole core of Contraband font；
It is provided between the fixed pole core of Contraband font (202) and L-type moving armature core (102) and is used as the resetting-mechanism
Spring (8)；
When the electromagnet is not powered on, L-type moving armature core (102) is located at original state, L-type moving armature core under original state
Remote rotating shaft end and the fixed pole core of Contraband font (202) remote rotating shaft end between leave primary clearance (12), it is corresponding
The primary clearance sets the air reactor (4)；When magnet coil (3) is powered, electromagnet attracts L-type moving armature core
(102), the remote rotating shaft end of L-type moving armature core contacts structure through air reactor (4) with the fixed pole core of Contraband font
Into the electromagnet of an openning type structure.
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| CN201710873758.XA CN107887889A (en) | 2017-09-25 | 2017-09-25 | For quickly changing the transient reactance device of AC network middle impedance value |
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| CN201710873758.XA CN107887889A (en) | 2017-09-25 | 2017-09-25 | For quickly changing the transient reactance device of AC network middle impedance value |
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