CN208707609U - A kind of load ratio bridging switch of commutating without arcing - Google Patents
A kind of load ratio bridging switch of commutating without arcing Download PDFInfo
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- CN208707609U CN208707609U CN201821314826.5U CN201821314826U CN208707609U CN 208707609 U CN208707609 U CN 208707609U CN 201821314826 U CN201821314826 U CN 201821314826U CN 208707609 U CN208707609 U CN 208707609U
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Abstract
The utility model discloses a kind of load ratio bridging switch of commutating without arcing, on the basis of retaining the main switch for being responsible for long-term conducting load current, selection switch, increase switching circuit, switching circuit only comes into operation in switching, compared to improving reliability and service life for full electronic load ratio bridging switch, also without the through-flow bring heat dissipation problem of silicon-controlled device long-time, commutating without arcing can be fully achieved compared to mechanical load ratio bridging switch, is realized also relatively simple, economical.
Description
Technical field
The utility model relates to a kind of load ratio bridging switch, the load ratio bridging switch of specifically a kind of commutating without arcing.
Background technique
Transformer on-load voltage regulating is the effective means of voltage adjustment, and load ratio bridging switch is to realize load tapchanging key again
Equipment.As the scale of modern power systems constantly expands, the requirement to power supply quality is increasingly harsh, tradition machinery formula has load to adjust
The shortcomings that compressing switch is also increasingly prominent.Tradition machinery formula on-load voltage regulating switch is mostly by the mechanical switch that is placed in fuel tank come complete
At the selection and switching of winding tap, containing complicated machinery, electrical components, when switching, has electric arc, not only damages transformation
Device insulation, can also cause contact ablation, and contact falls off, slide piece, operating mechanism failure, and adjustment speed is slow, cannot frequently grasp
Make, maintenance workload is big, these are all restricted its application significantly.
Whether it ensures voltage adjusting device safe operation, still meets system stabilization, rapid pressure adjusting demand, no arcing switching is all
It is to improve the necessary problems faced of load ratio bridging switch scheme.Development of Power Electronic Technology is swift and violent at present, domestic and international many researchs
Personnel start to explore impact is small, response is fast, switching when be not likely to produce the power electronics voltage-regulating technique of electric arc, as mechanical modification type has
Voltage adjustment of on-load scheme, but mechanical modification type on-load voltage regulating switch scheme tends not to realize complete arc extinguishing.
So that load ratio bridging switch is realized tap changing in load-carrying situation, needs to meet the load during switching
Electric current cannot interrupt, and there are also short circuit cannot occur between tap.
Utility model content
Technical problem to be solved by the utility model is: providing a kind of load ratio bridging switch of commutating without arcing, switching is introduced
Circuit, switching circuit come into operation in switching, realize commutating without arcing.
In order to solve the technical problem, the technical solution adopted in the utility model is: a kind of commutating without arcing has load point
Connect switch, including basic winding, with the concatenated tap-changing windings of basic winding, multiple winding taps for being drawn from tap-changing windings
And the neutral static contact drawn from basic winding, if selecting the movable contact of switch C1, C2 there are two switch C1, C2 is selected
It is connected to winding tap or neutral static contact according to the working condition of load ratio bridging switch, switch C1, C2 is selected to pass through two
Current-collector in parallel connects into main switch circuit with main switch, load, further includes the switching circuit for realizing commutating without arcing, switching electricity
Road includes switching switch, overvoltage switches static thyristor switch, overvoltage switches static thyristor switch control circuit, electric current
Switch static thyristor switch, current switching static state thyristor switch control circuit, switching switch is connected to main switch and current collection
Between device, two contacts for switching switch are connected with two current-collectors respectively；Current switching static state thyristor switch is connected in parallel on master
Switch ends, current switching static state thyristor switch control circuit are connected to current switching static state thyristor switch both ends, and electricity
The static thyristor switch control circuit that stream switches detects the electric current on main switch circuit by current transformer, when main switch is just wanted
When disconnection or closure make to generate the electric current of variation on main switch circuit, the triggering of current switching static state thyristor switch control circuit
The conducting of current switching static state thyristor switch, makes main switch realize commutating without arcing；It is in parallel that overvoltage switches static thyristor switch
In main switch and switching switch ends, it is static brilliant that the static thyristor switch control circuit of overvoltage switching is connected to overvoltage switching
Thyristor switch both ends, when overvoltage, which switches static thyristor switch control circuit, detects overvoltage, triggering overvoltage switching
Static thyristor switch conducting, makes switching switch not generate electric arc.
Further, current switching static state thyristor switch includes the thyristor of two reverse parallel connections, current transformer packet
Two secondary windings are included, current switching static state thyristor switch control circuit includes two identical trigger circuits, and two secondary
Winding is connect with two trigger circuits respectively with opposite polarity, and two trigger circuits control the on-off of two thyristors respectively.
Further, the trigger circuit includes diode D1, D2, capacitor C1 and triode Q1, and the end A of secondary winding is logical
The diode D1 for crossing forward conduction is connected to the end A of capacitor C1, and the end B of capacitor C1 is connected to by the diode D2 of forward conduction
The base stage of triode Q1, the collector of triode Q1 are connected between the cathode of diode D1 and the end A of capacitor C1, triode Q1
Emitter be connected between the B group of secondary winding and the anode of diode D2, the side a and b of capacitor C1 is respectively connected to crystalline substance
The gate pole and cathode of brake tube.
Further, between the cathode of diode D1 and the collector of triode Q1, the base stage of triode Q1 and diode
Between the anode of D2, divider resistance, the base of triode Q1 are equipped between the emitter of triode Q1 and the anode of diode D2
Pull-up resistor is equipped between pole and the end A of capacitor C1.
Further, overvoltage switches the thyristor that static thyristor switch includes two reverse parallel connections, overvoltage switching
Static thyristor switch control circuit includes the full-bridge circuit being made of four diodes, between two angle steel joints of full-bridge circuit
There are two concatenated silicon single-phase switch, two disconnected angle steel joints of full-bridge circuit to pass through trigger circuit respectively and be connected to two for connection
A thyristor, trigger circuit include diode Dx, silicon single-phase switch SUSx and capacitor Cx, and angle steel joint one end of full-bridge circuit passes through
Silicon single-phase switch SUSx is connected to the gate pole of thyristor, and the other end is connected to the cathode of diode Dx, and the anode of diode Dx is even
It is connected to the cathode of thyristor, capacitor Cx is connected between the front end of silicon single-phase switch SUSx and the anode of diode Dx.
Further, the cathode of thyristor, which is connected with, inhales surge current resistance, the gate pole and suction surge current electricity of thyristor
Suction noise resistance is connected between resistance.
Further, the static thyristor switch of overvoltage switching is in series with transition resistance.
Further, overvoltage switching static thyristor switch both ends are parallel with resistance-capacitance absorption element, main switch and electric current
Mutual inductor both ends are parallel with resistance-capacitance absorption element.
Further, basic winding is connected with polarity reversing switch, and two contacts of polarity reversing switch are connected to
The both ends of tap-changing windings.
Further, select switch C1, C2 and switching switch by motor control.
The utility model has the beneficial effects that the utility model is retaining the main switch for being responsible for long-term conducting load current, choosing
On the basis of selecting switch, increase switching circuit, switching circuit only comes into operation in switching, has load point compared to full electronic
It connects and improves reliability and service life for switch, also without the through-flow bring heat dissipation problem of silicon-controlled device long-time, phase
Than commutating without arcing can be fully achieved in mechanical load ratio bridging switch, realize also relatively simple, economical.
Switching circuit includes that current switching static state thyristor switch and overvoltage switch static thyristor switch, current switching
Static thyristor switch is triggered conducting when main switch starts and is closed or turns off, to make main switch realization commutating without arcing.
Overvoltage switches static thyristor switch when main switch is opened and the thyristor switch of parallel connection disconnects, and handoff leg both ends generate
Overvoltage, more than setting voltage threshold when, additional static switch control circuit just triggers the conducting of additional thyristor switch,
This allows for extra switch can be with commutating without arcing.To realize complete arc extinguishing.
Current switching static state thyristor switch only starts ability quilt in the half period for being closed or turning off in main switch contact
Triggering and conducting, so that, if generating circulation in adjunct circuit and tap-changing windings, circulation can only continue half when main switch closure
A period, therefore avoid excessive circulation and thus bring energy loss.
Using static thyristor switch control circuit, one is used to detect electric current, and one is used to detect overvoltage, completely
The control switch for detection switch location information is eliminated, cost is saved, also avoids switch abrasion.
Detailed description of the invention
Fig. 1 is the circuit diagram of load ratio bridging switch described in the utility model；
Fig. 2 is the schematic diagram of current switching static state thyristor switch control circuit；
Fig. 3 is the schematic diagram that overvoltage switches static thyristor switch control circuit.
Specific embodiment
The utility model is further described in the following with reference to the drawings and specific embodiments.
Embodiment 1
A kind of load ratio bridging switch for realizing commutating without arcing, as described in Figure 1, including basic winding 10 and basic winding 10
Concatenated tap-changing windings 14, the multiple winding taps drawn from tap-changing windings 14 and the neutrality drawn from basic winding
Static contact N, if selecting the movable contact of switch C1, C2 according to the working condition of load ratio bridging switch there are two switch C1, C2 is selected
It is connected to winding tap or neutral static contact, switch C1, C2 is selected to pass through two current-collectors 20,22 and main switch in parallel
40, load connects into main switch circuit.In the present embodiment, 8 winding taps drawn on tap-changing windings 14, are exactly in Fig. 1
Tap 1-8, under normal operating conditions, C1 can only have one to be connected with winding tap to load ratio bridging switch with C2,
Another is connected to neutral static contact N, and only in handoff procedure, C1 and C2 are likely to bridge at two adjacent taps, from
And load current can continue to be connected.
In order to realize that commutating without arcing, load ratio bridging switch further include the switching circuit for realizing commutating without arcing, switching circuit packet
Include switching switch 32, overvoltage switches static thyristor switch, overvoltage switches static thyristor switch control circuit 39, electric current
Switch static thyristor switch, current switching static state thyristor switch control circuit 44.
Switching switch 32 is connected between main switch 40 and current-collector 20,22, switches 26,28 points of two contacts of switch 32
It is not connected with current-collector 20,22.Current switching static state thyristor switch is connected in parallel on 40 both ends of main switch, the static brilliant lock of current switching
Pipe ON-OFF control circuit 44 is connected to current switching static state thyristor switch both ends, and current switching static state thyristor switch controls
Circuit 44 detects the electric current on main switch circuit by current transformer 46, opens master when main switch 40 just will have been disconnected or be closed
When generating the electric current of variation on the circuit of pass, the static brilliant lock of 44 trigger current of current switching static state thyristor switch control circuit switching
Pipe switch conduction makes main switch 40 realize commutating without arcing.
Overvoltage switches static thyristor switch and is connected in parallel on main switch 40 and switching 32 both ends of switch, and overvoltage switching is static
Thyristor switch control circuit 39 is connected to overvoltage and switches static thyristor switch both ends, when overvoltage switches static thyristor
When ON-OFF control circuit 39 detects overvoltage, triggering overvoltage switches static thyristor switch conducting, makes to switch switch 32 not
Generate electric arc.Main switch 40 and switching switch 32 can realize commutating without arcing, therefore load ratio bridging switch energy described in the present embodiment
Enough complete arc extinguishings.
As shown in Figure 1, 2, current switching static state thyristor switch includes the thyristor 42,43 of two reverse parallel connections, electric current
Mutual inductor 46 includes two secondary windings, and current switching static state thyristor switch control circuit 44 includes two identical triggering electricity
Road, two secondary windings are connect with two trigger circuits respectively with opposite polarity, and two trigger circuits control two brilliant locks respectively
The on-off of pipe 42,43.
As shown in Fig. 2, the trigger circuit of thyristor 42 includes diode D1, D2, capacitor C1 and triode Q1, secondary winding
The end A the end A of capacitor C1, the diode that the end B of capacitor C1 passes through forward conduction are connected to by the diode D1 of forward conduction
D2 is connected to the base stage of triode Q1, and the collector of triode Q1 is connected between the cathode of diode D1 and the end A of capacitor C1,
The emitter of triode Q1 is connected between the B group of secondary winding and the anode of diode D2, the side a and b difference of capacitor C1
It is connected to the gate pole and cathode of thyristor.
Divider resistance r1, the base stage of triode Q1 and two are equipped between the cathode of diode D1 and the collector of triode Q1
It is equipped with divider resistance r4 between the anode of pole pipe D2, partial pressure electricity is equipped between the emitter of triode Q1 and the anode of diode D2
R2 is hindered, pull-up resistor r3 is equipped between the base stage of triode Q1 and the end A of capacitor C1.The trigger circuit and thyristor of thyristor 43
42 trigger circuit is identical, is exactly the lower half portion in Fig. 2, is not repeated herein.
Because two secondary windings are connect with two trigger circuits respectively with opposite polarity, thyristor 42,43 is not
It is connected with load current cycle.In the present embodiment, thyristor 43 is connected in load current positive half cycle, and thyristor 42 is in load electricity
It is connected when flowing negative half period.
Illustrate the realization principle of control circuit 44 by taking positive half cycle current triggers thyristor 43 as an example below, thyristor 42 triggers
Process is similarly.When the electric current for flowing through main switch 40 is positive half cycle increase, the secondary winding of unsteady flow mutual inductor 46 is also generated equally
The electric current in direction.Forward current flows through diode D3 and resistance r1 conducting, while electric current charges to capacitor C1, until base-emitter-base bandgap grading
Triode Q2 conducting.Divider resistance r2 and r4 collective effect, adjust suitable voltage, electric current trigger thyristor 43 conducting,
Voltage, current control are avoided burning thyristor 42, be played a protective role within the maximum power of thyristor 42 simultaneously.Two
Pole pipe D4 plays the role of adjusting when high current or surge current the base current of Q2.Current transformer 46 is designed to
Saturable, so that reducing the electric current tune of Q2 even if the electric current in secondary winding will not increase therewith under big loading condiction
Whole range.Resistance r1 can get portion voltage under conditions of high current, adjust saturation current.
As shown in Figure 1,3, overvoltage switches the thyristor 36,37 that static thyristor switch includes two reverse parallel connections, mistake
It includes the full-bridge circuit being made of four diodes D7, D8, D9, D10, full-bridge that voltage, which switches static thyristor switch control circuit,
Connection is there are two concatenated silicon single-phase switch D11, D12 between two angle steel joints of circuit, other two is disconnected for full-bridge circuit
Angle steel joint pass through trigger circuit respectively and be connected to two thyristors.
The trigger circuit of thyristor 37 includes diode D5, silicon single-phase switch SUS1 and capacitor C2, full-bridge circuit it is diagonal
Point one end is connected to the gate pole of thyristor 37 by silicon single-phase switch SUS1, and the other end is connected to the cathode of diode D5, two poles
The anode of pipe D5 is connected to the cathode of thyristor 37, and front end that capacitor C2 is connected to silicon single-phase switch SUS1 and diode D5 are just
Between pole.And the cathode of thyristor 37, which is connected with, inhales surge current resistance r7, the gate pole and suction surge current electricity of thyristor 37
It is connected between resistance r7 and inhales noise resistance r5.
The trigger circuit of thyristor 36 includes diode D6, silicon single-phase switch SUS2 and capacitor C3, full-bridge circuit it is another
A angle steel joint one end without connecting D11, D12 is connected to the gate pole of thyristor 36 by silicon single-phase switch SUS2, and the other end connects
It is connected to the cathode of diode D6, the anode of diode D6 is connected to the cathode of thyristor 36, and capacitor C3 is connected to silicon single-phase switch
Between the front end of SUS2 and the anode of diode D6.And the cathode of thyristor 36, which is connected with, inhales surge current resistance r8, brilliant lock
It is connected between the gate pole and suction surge current resistance r8 of pipe 36 and inhales noise resistance r6.
Illustrate control circuit so that overvoltage switches the collected forward voltage of static thyristor control circuit 39 as an example below
39 principle, when overvoltage is from zero positive increase, D6, D7, D10 forward bias, D5, D8, D9 reverse bias, when overvoltage is super
When crossing the breakdown voltage of D11 and D12, the end voltage of current lead-through, C2 is begun setting up, while being charged to C2, and silicon is single-phase at this time opens
It closes SUS1 both end voltage also to start to increase, when being more than its threshold value, SUS1 becomes small resistance value by originally very big resistance value, thus will
The electric current of bridge circuit and C2 and as trigger current, triggers thyristor 37 and is connected, avoid the switching generation electric arc of switch 32.Hereafter it bears
It carries voltage to start to increase, overvoltage condition is also eliminated.The effect of resistance r7 is to absorb the wave generated when the triggering of 37 gate pole of thyristor
Electric current is gushed, the effect of resistance r5 is absorption of noise, is avoided to thyristor 36,37 false triggerings.Similarly, when control circuit 44 collects
When negative voltage, that is, overvoltage is gradually reduced to zero, thyristor 36 is triggered conducting, avoids the switching generation electric arc of switch 32.
In the present embodiment, overvoltage switches static thyristor switch and is in series with transition resistance 34.Overvoltage switching is static brilliant
Thyristor switch both ends are parallel with resistance-capacitance absorption element 50,52, and main switch 40 and 46 both ends of current transformer are parallel with resistance-capacitance absorption
Element 54,56.
In the present embodiment, basic winding 10 is connected with polarity reversing switch 17, two contacts point of polarity reversing switch 17
It is not connected to the both ends of tap-changing windings 14.14 polarity of tap-changing windings can be changed in polarity reversing switch 17, keeps tap number constant
Under conditions of, range of regulation becomes original twice.
In the present embodiment, switch C1, C2 and switching switch is selected to be controlled by motor 15.
The working principle of load ratio bridging switch described in the present embodiment are as follows:
Under normal operating conditions, as long as there is electric current to flow through main switch 40, trigger circuit 44 will trigger 42 He of thyristor
43.But it is small due to the resistance value ratio thyristor of main switch 40 42,43, so thyristor is only triggered but there is no being connected,
In " empty short " state.However, when main switch begin breaking or start closure when, the electric current for flowing through main switch drop to zero it
Before, the empty short status of thyristor 42,43 is just eliminated, and simultaneously half of cycle of constant conduction is triggered, so that the realization of main switch 40 is cut without arc
It changes.Because trigger current is obtained by principal current, when main switch 40 disconnects, the electric current for flowing through main switch 40 drops to
Zero, trigger circuit 44 stops working, and current switching static state thyristor switch also can stop being connected in next zero crossing of electric current.
The realization process for implementing switching is following (for switching to tap 3 by tap 2):
(1) before switching, first selection switch C1 and pre-selection tap 3 are connected；
(2) main switch 40 is opened, and by 44 triggering and conducting of control circuit, load current is switched to be opened thyristor 42,43 with master
It closes and circulates in 40 current switching static state thyristor switch circuits in parallel, switch 40 may be implemented no arc and cut-off；
(3) electric current for flowing through main switch 40 drops to after zero, and trigger circuit 44 stops working, static thyristor switch
It can stop conducting in next zero crossing of electric current.
(4) when the thyristor 42,43 of main switch 40 and parallel connection is all not turned on electric current, load voltage is begun to decline, and is cut
Change the thyristor 36 in parallel of switch 32, the voltage at 37 both ends is begun to ramp up.When control circuit 39 detects the both ends of terminal 26 and 38
Voltage be more than given threshold when, just trigger thyristor 36,37 conducting voltage forward direction when, thyristor 37 be connected；When voltage negative sense,
Thyristor 36 is connected, and load current, which just switches to, flows through selection switch C1, resistance 34 and static switch 36,37.Load current is not
It can interrupt.
(5) switching switch 32 acts, and is connected to stationary contact 26.It, can because there is no current flowing in switching switch 32
It is acted with realizing without arc.
(6) switch 40 is closed.Switch 32 and 40 by 42,43 short circuit of thyristor connected in parallel, electric current will then flow through around
Group tap 3, stationary contact 26, switch 32 and main switch 40.Overvoltage condition disappears, and control circuit 39 also stops triggering, thyristor
Switch 36,37 stops conducting.
(7) selection switch C2 does not have current flowing, can be detached from tapping 2 without arc.So far, it boosts primary switching
Journey terminates.
It is depressured handoff procedure and the handoff procedure that boosts the difference is that bridges some time of two taps, meeting simultaneously
Generate circulation.By taking tap 3 switches back to tap 2 again as an example, 28 period of connection upper contact is arrived when switch 32 is detached from contact 26, is not had
Electric arc generates, because flowing through switch 40 and thyristor 42,43 without electric current.After a short delay, then by main switch 40
Closure, can generate circulation between tap 3 and 2 at this time.But after switch 40 is closed, overvoltage condition can also disappear, so
The trigger signal of control circuit 39 is removed, and thyristor 36 and 37 can also stop conducting in a zero crossing under electric current.Even if in this way
Generating circulation can will also be limited within half period the duration, and current-limiting resistance 34 also effectively limits the big of circulation
It is small.Hereafter, thyristor 36,37 is also no longer turned on, and load current is no longer flow through in parallel with additional switching switch 32 and main switch 40
Static switch circuit, all load currents can flow through tapping 2, tap switch C2, additional switching switch 32 and leading and hold
Close 40.
Described above is only the basic principle and preferred embodiment of the utility model, and those skilled in the art are according to this reality
With the novel improvement and replacement made, belong to the protection scope of the utility model.
Claims (8)
1. a kind of load ratio bridging switch of commutating without arcing, including basic winding, with the concatenated tap-changing windings of basic winding, from pressure regulation
The multiple winding taps drawn on winding and the neutral static contact drawn from basic winding, if there are two selection switches
The movable contact of C1, C2, selection switch C1, C2 are connected to winding tap according to the working condition of load ratio bridging switch or neutrality is quiet
Contact selects switch C1, C2 to connect into main switch circuit by two current-collectors and main switch in parallel, load, and feature exists
In: it further include the switching circuit for realizing commutating without arcing, switching circuit includes that switching switchs, overvoltage switches static thyristor and opens
It closes, overvoltage switches static thyristor switch control circuit, current switching static state thyristor switch, current switching static state thyristor
ON-OFF control circuit, switching switch are connected between main switch and current-collector, and two contacts for switching switch collect with two respectively
Electric appliance is connected；Current switching static state thyristor switch is connected in parallel on main switch both ends, current switching static state thyristor switch control electricity
Road is connected to current switching static state thyristor switch both ends, and current switching static state thyristor switch control circuit is mutual by electric current
Sensor detects the electric current on main switch circuit, when main switch just will disconnect or be closed the electricity for making to generate variation on main switch circuit
When stream, current switching static state thyristor switch control circuit trigger current switches static thyristor switch conducting, keeps main switch real
Existing commutating without arcing；Overvoltage switches static thyristor switch and is connected in parallel on main switch and switching switch ends, and overvoltage switching is static
Thyristor switch control circuit is connected to overvoltage and switches static thyristor switch both ends, opens when overvoltage switches static thyristor
Control circuit is closed when detecting overvoltage, triggering overvoltage switches static thyristor switch conducting, and switching switch is made not generate electricity
Arc；
Current switching static state thyristor switch includes the thyristor of two reverse parallel connections, current transformer include two it is secondary around
Group, current switching static state thyristor switch control circuit include two identical trigger circuits, and two secondary windings are with opposite pole
Property is connect with two trigger circuits respectively, and two trigger circuits control the on-off of two thyristors respectively；
Overvoltage switches the thyristor that static thyristor switch includes two reverse parallel connections, and overvoltage switches static thyristor switch
Control circuit includes the full-bridge circuit being made of four diodes, and there are two series connection for connection between two angle steel joints of full-bridge circuit
Silicon single-phase switch, two disconnected angle steel joints of full-bridge circuit pass through trigger circuit respectively and are connected to two thyristors, trigger
Circuit includes diode Dx, silicon single-phase switch SUSx and capacitor Cx, and angle steel joint one end of full-bridge circuit passes through silicon single-phase switch
SUSx is connected to the gate pole of thyristor, and the other end is connected to the cathode of diode Dx, and the anode of diode Dx is connected to thyristor
Cathode, capacitor Cx is connected between the front end of silicon single-phase switch SUSx and the anode of diode Dx.
2. the load ratio bridging switch of commutating without arcing according to claim 1, it is characterised in that: the trigger circuit includes two
Pole pipe D1, D2, capacitor C1 and triode Q1, the end A of secondary winding are connected to the A of capacitor C1 by the diode D1 of forward conduction
End, the end B of capacitor C1 are connected to the base stage of triode Q1, the collector connection of triode Q1 by the diode D2 of forward conduction
To diode D1 cathode and capacitor C1 the end A between, the emitter of triode Q1 is connected to the B group and diode of secondary winding
Between the anode of D2, the side a and b of capacitor C1 is respectively connected to the gate pole and cathode of thyristor.
3. the load ratio bridging switch of commutating without arcing according to claim 2, it is characterised in that: the cathode of diode D1 and three
Between the collector of pole pipe Q1, between the base stage of triode Q1 and the anode of diode D2, the emitter of triode Q1 and two poles
It is equipped with divider resistance between the anode of pipe D2, pull-up resistor is equipped between the base stage of triode Q1 and the end A of capacitor C1.
4. the load ratio bridging switch of commutating without arcing according to claim 1, it is characterised in that: the cathode of thyristor is connected with
Surge current resistance is inhaled, is connected with suction noise resistance between the gate pole and suction surge current resistance of thyristor.
5. the load ratio bridging switch of commutating without arcing according to claim 1, it is characterised in that: the static brilliant lock of overvoltage switching
Pipe switch is in series with transition resistance.
6. the load ratio bridging switch of commutating without arcing according to claim 1, it is characterised in that: the static brilliant lock of overvoltage switching
Pipe switch ends are parallel with resistance-capacitance absorption element, and main switch and current transformer both ends are parallel with resistance-capacitance absorption element.
7. the load ratio bridging switch of commutating without arcing according to claim 1, it is characterised in that: basic winding is connected with polarity
Change-over switch, two contacts of polarity reversing switch are connected to the both ends of tap-changing windings.
8. the load ratio bridging switch of commutating without arcing according to claim 1, it is characterised in that: select switch C1, C2 and cut
Switch is changed by motor control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821314826.5U CN208707609U (en) | 2018-08-15 | 2018-08-15 | A kind of load ratio bridging switch of commutating without arcing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821314826.5U CN208707609U (en) | 2018-08-15 | 2018-08-15 | A kind of load ratio bridging switch of commutating without arcing |
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| Publication Number | Publication Date |
|---|---|
| CN208707609U true CN208707609U (en) | 2019-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821314826.5U Expired - Fee Related CN208707609U (en) | 2018-08-15 | 2018-08-15 | A kind of load ratio bridging switch of commutating without arcing |
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| CN (1) | CN208707609U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816232A (en) * | 2020-12-31 | 2021-05-18 | 北京中瑞和电气有限公司 | Arc discharge explosion-proof test device in on-load tap-changer oil |
| CN113889329A (en) * | 2021-09-26 | 2022-01-04 | 上海华明电力设备制造有限公司 | On-load tap-changer switching method, circuit and device |
-
2018
- 2018-08-15 CN CN201821314826.5U patent/CN208707609U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112816232A (en) * | 2020-12-31 | 2021-05-18 | 北京中瑞和电气有限公司 | Arc discharge explosion-proof test device in on-load tap-changer oil |
| CN113889329A (en) * | 2021-09-26 | 2022-01-04 | 上海华明电力设备制造有限公司 | On-load tap-changer switching method, circuit and device |
| CN113889329B (en) * | 2021-09-26 | 2023-12-15 | 上海华明电力设备制造有限公司 | On-load tap-changer switching method, circuit and device |
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Granted publication date: 20190405 Termination date: 20210815 |