CN106532904A - Double bus-powered PT secondary voltage switching circuit and protection circuit thereof - Google Patents
Double bus-powered PT secondary voltage switching circuit and protection circuit thereof Download PDFInfo
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- CN106532904A CN106532904A CN201710003531.XA CN201710003531A CN106532904A CN 106532904 A CN106532904 A CN 106532904A CN 201710003531 A CN201710003531 A CN 201710003531A CN 106532904 A CN106532904 A CN 106532904A
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- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/02—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which an auxiliary distribution system and its associated lamps are brought into service
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Abstract
The invention discloses a double bus-powered PT secondary voltage switching circuit and a protection circuit thereof. The protection circuit comprises a change-over switch and a plurality of connection wires, wherein the change-over switch comprises four groups of auxiliary normally open contacts; and each group of auxiliary normally open contacts include two contacts and are connected with corresponding connection terminals of the double bus-powered PT secondary voltage switching circuit through the corresponding connection wires. The change-over switch has a first working state, a second working state and a third working state, the first working state is a first bus switching gear, the second working state is a stopping gear and the third working state is a second bus switching gear. A voltage switching device can switch secondary voltage collected from a first bus PT or a second bus PT to output normal secondary protection measurement voltage and metering voltage through adjusting different gears of the change-over switch, so that misoperation of a high-voltage switch cabinet relay protection device and electric energy metering leakage generated by a voltage loss caused by poor closing of auxiliary switch contacts of isolation switches are avoided.
Description
Technical field
The present invention relates to the PT secondary voltage switch protecting technical fields that transformer station's double-bus is powered, more particularly to it is a kind of double
The PT secondary voltages switching circuit of bussed supply and its protective loop.
Background technology
In the high-tension switch cabinet that double-bus is powered, no matter obtain second protection measurement voltage or obtain secondary measurement electricity
Pressure, the secondary voltage that I is female and II mothers PT (mutual inductance) is next is by the voltage switching device of bus isolation switch auxiliary switch control
It is to complete collection, switching and the output of the secondary voltage come to PT, final to determine that the secondary voltage come by which section bus PT is supplied
Electricity.
In the actual course of work, often there is exception in the auxiliary switch work of isolation switch, and such as isolation switch exists
During closing operation, have often because the structural linkages of auxiliary switch are aging, during grid switching operation, operating mechanism link action is excessive, can make
Action link rod into its auxiliary switch ruptures, or the baffle plate displacement of auxiliary switch connecting rod, deformation are touched on operating mechanism link,
Or the wiring of auxiliary switch such as loosens, comes off at the problem that can all cause the contact and its circuit closed of auxiliary switch bad.Every
Secondary voltage switching dead electricity can be caused from the auxiliary switch operation irregularity of disconnecting link, and then protective relaying device will certainly be affected just
The accuracy that positive motion is made and electric energy meter is measured.But, as auxiliary switch and its contact are installed on inside high-tension switch cabinet, typically
Near isolation switch, trouble location is such as keeped in repair or changes, two adjacent buses are required to have a power failure and could overhaul, and this will certainly make
Greatly prolong into large-area load adjustment, and then the time of causing power failure, it is generally the case that interruption maintenance is implemented to two buses
Also it is unrealistic.But on-site actual situations be many double-bus electric power systems, the isolation switch power supply of falling bus related frequency, which is auxiliary
The contact operation irregularity of switch is helped, causes PT secondary voltages switching no-voltage fault to happen occasionally.Therefore, how to solve double-bus two
Secondary voltage switching device no-voltage fault, and then guarantee the normal power supply of PT secondary voltages to meet production requirement, it is current ability
Field technique personnel technical problem urgently to be resolved hurrily.
The content of the invention
In view of this, the present invention discloses a kind of double-bus isolation switch secondary voltage switching circuit and its protective loop, with
Double bus isolation is solved from knife auxiliary switch voltage switching circuit decompression, the correct operation and electric energy meter of protective relaying device is affected
The accuracy problem of metering.
To solve above-mentioned technical problem, the present invention is disclosed directly below technical scheme：
The protective loop of the PT secondary voltage switching circuits that double-bus is powered, including permutator and Duo Gen connecting wires；
Wherein：
The permutator includes that first group of auxiliary normal opened contact, second group of auxiliary normal opened contact, the 3rd group of auxiliary are normally opened
Contact and the 4th group of auxiliary normal opened contact；Wherein, first group of auxiliary normal opened contact includes the first contact and the second contact；Second group
Auxiliary normal opened contact includes the 3rd contact and the 4th contact；3rd group of auxiliary normal opened contact includes the 5th contact and the 6th contact；
4th group of auxiliary normal opened contact includes the 7th contact and the 8th contact；
The permutator has three kinds of working conditions, is the first working condition, the second working condition and the 3rd work respectively
Make state；Wherein, first working condition is I mother's combined floodgate gears, under first working condition, first contact
With second contact, the 3rd contact and the 4th contact, the 5th contact and the 6th contact
Disconnect, the 7th contact is disconnected with the 8th contact；Second working condition is stopping gear, in second work
Make under state, first contact is disconnected with second contact, the 3rd contact is disconnected with the 4th contact, described
Five contacts are disconnected with the 6th contact, and the 7th contact is disconnected with the 8th contact；3rd working condition is II
Female combined floodgate gear, under the 3rd working condition, first contact is disconnected with second contact, the 3rd contact
With the 4th contact disconnection, the 5th contact and the 6th contact, the 7th contact and the 8th contact
Connect；
Under normal operation, permutator is placed in the second working condition, that is, stop gear.
The PT secondary voltage switching circuits that the double-bus is powered include second protection measurement voltage switching circuit and secondary
Metered voltage switching circuit.First contact is connected to the first DC power supply switch that second protection measures voltage switching circuit
Load side and I mother isolation switch auxiliary switch go second protection measurement voltage switching device on the first normal opened contact between
Binding post on, second contact is connected to the auxiliary switch of I mother's isolation switch and goes second protection measurement voltage to cut
On the binding post between the second normal opened contact and I mother's protection voltage indicator lamp on changing device；
3rd contact is connected to the load side of the second DC power supply switch of the secondary measurement voltage switching circuit
Binding post between the 3rd normal opened contact gone on secondary measurement voltage switching device with the auxiliary switch of I mother's isolation switch
On, the 4th contact is connected to the auxiliary switch of I mother's isolation switch and goes the 4th normal of the secondary measurement voltage switching device
Open on the binding post between contact and I mother's metered voltage display lamps；
The auxiliary of load side and II mother's isolation switch that the 5th contact is connected to first DC power supply switch is opened
On binding post between the 5th normal opened contact that pass is gone on the second protection measurement voltage switching device, the 6th contact
Be connected to that the auxiliary switch of II mother's isolation switch gone on the second protection measurement voltage switching device the 6th normally opened connects
On binding post between point and II mother's protection voltage indicator lamps；
The load side that 7th contact is connected to second DC power supply switch is auxiliary with II mother's isolation switch
On the binding post helped between the 7th normal opened contact that switch gone on the secondary measurement voltage switching device, the 8th contact
Be connected to the 8th normal opened contact that the auxiliary switch of II mother's isolation switch gone on the secondary measurement voltage switching device with
On binding post between II mother's metered voltage display lamps；
It is first contact, second contact, the 3rd contact, the 4th contact, the 5th contact, described
6th contact, the 7th contact and the 8th contact are by the connecting wire and the corresponding binding post phase
Even.
Preferably, in above-mentioned protective loop, the connecting wire is only stock copper cash.
Preferably, in above-mentioned protective loop, the connecting wire is 2.5mm2Only stock copper cash.
Preferably, in above-mentioned protective loop, first contact is connected in parallel with the 5th contact, the 3rd contact
It is connected in parallel with the 7th contact.
The PT secondary voltage switching circuits that double-bus is powered, including as above arbitrary described protective loop.
The protective loop of PT secondary voltages that double-bus disclosed by the invention is powered switching has the beneficial effect that：
In protective loop disclosed by the invention, the I mother's isolation switch that either closes is powered by which, the female isolation of the II that still closes
Disconnecting link is powered by which, if the normal opened contact of both auxiliary switches cannot be closed in real time, can be by this in the case of two kinds
The protective loop of disclosure of the invention solves the problems, such as decompression, that is, only need to operate the operating handle of permutator, select I female as needed
Close a floodgate or the female combined floodgates of II, the secondary voltage that voltage switching device will be come from I mother PT or II mothers PT collections, Jing switch,
Normal second protection measurement voltage and secondary measurement voltage are exported for relevant device, so as to be avoided that high-tension switch cabinet relay is protected
The leakage meter of protection unit malfunction and electric energy metrical.
Description of the drawings
For the technical scheme in being illustrated more clearly that the embodiment of the present invention or background technology, below will be to embodiment or the back of the body
Accompanying drawing to be used needed for the description of scape technology is briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is that a kind of protection of typical double-bus (I is female, II is female) isolation switch auxiliary switch control in prior art is surveyed
The electric hookup of amount voltage switching circuit；
Fig. 2 is a kind of metering electricity of typical double-bus (I is female, II is female) isolation switch auxiliary switch control in prior art
The electric hookup of pressure switching circuit；
Fig. 3 is the front view of permutator disclosed in the embodiment of the present invention；
Fig. 4 is the connection point on-off figure of the permutator shown in Fig. 3；
Fig. 5 is the connection diagram of permutator disclosed in the embodiment of the present invention.
Specific embodiment
In order that those skilled in the art more fully understand the technical scheme in the present invention, below in conjunction with of the invention real
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described enforcement
Example a part of embodiment only of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, this area is general
The every other embodiment obtained under the premise of creative work is not made by logical technical staff, should all belong to guarantor of the present invention
The scope of shield.
The embodiment of the present invention discloses a kind of protective loop of the PT secondary voltage switching circuits that double-bus is powered, double to guarantee
In bussed supply, operation isolation disconnecting link secondary voltage switching device can export normal second protection measurement voltage and secondary measurement
Voltage, so as to avoid the malfunction of the protective relaying device of high-tension switch cabinet and the leakage meter of electric energy metrical.
In order to more clearly understand protective loop disclosed in the embodiment of the present invention, double-bus electric power system is described below
Double bus isolation from switch operation PT secondary voltage switch the course of work.
Refer to Fig. 1 and Fig. 2, Fig. 1 is a kind of protection of typical double-bus I, II mother's isolation switch auxiliary switch control
The electric hookup of measurement voltage switching circuit；A kind of typical double-bus I, II mother's isolation switch auxiliary switch controls of Fig. 2
The electric hookup of metered voltage switching circuit.
The PT secondary voltage switching circuits that double-bus disclosed in the embodiment of the present application is powered include second protection measurement voltage
Switching circuit and secondary measurement voltage switching circuit, wherein, second protection measurement voltage switching circuit be isolation switch QS1 and every
Contact from the auxiliary switch of disconnecting link QS2 is controlled respectively, and is switched over, exported by voltage switching device I；Secondary measurement electricity
Pressure switching circuit, is isolation switch QS1 and the contact of the auxiliary switch of isolation switch QS2 is controlled respectively, and by voltage switching
Device II is switched over, is exported.
During the PT secondary voltage switch operatings that double-bus is powered, as the I mother isolation switch QS1 of high-tension switch cabinet
During combined floodgate, the first normal opened contact 223 of I mother's isolation switch QS1 auxiliary switches is closed with the second normal opened contact 224, voltage switching
First coil 1YQ of the I mother's secondary voltage switching relays on device I (i.e. second protection measurement voltage switching device 8n) is obtained
Electricity, its normal opened contact are closed, now from I female PT secondary voltages by WV (the i.e. little mother of I mother's PT protection voltages
Line 1YMa, 1YMb, 1YMc, 1YMn) voltage switching device I is wired to, second protection measurement voltage is finally exported, is that the height is pressed off
Close cabinet protection device and second protection measurement voltage is provided, and the mother's protection voltages of the I on voltage switching device I can be seen simultaneously
Display lamp LD1 is lighted.
At the same time, the 3rd normal opened contact 233 and the 4th normal opened contact 234 of I mothers isolation switch QS1 auxiliary switches is closed
Close, the I mother's secondary voltages on voltage switching device II (i.e. secondary measurement voltage switching device 9n) switch the second line of relay
Circle 3YQ obtains electric, and its normal opened contact is closed, now from I female PT secondary voltages by WV (i.e. I mother's PT metered voltages
Little bus 3YMa, 3YMb, 3YMc, 4YMn) voltage switching device II is wired to, secondary measurement voltage is finally exported, is the high pressure
Switch cubicle electric energy meter provides secondary measurement voltage, and can see the mother's metered voltage display lamps of the I on voltage switching device II simultaneously
LD3 is lighted.
In the same manner, when the II mother isolation switch QS2 of high-tension switch cabinet close a floodgate, the of II mother's isolation switch QS2 auxiliary switches
Five normal opened contacts 225 are closed with the 6th normal opened contact 226, the II mother's secondary voltage switching relays on voltage switching device I
First coil 2YQ obtains electric, and its normal opened contact is closed, now from II female PT secondary voltages by WV (i.e. II mother PT
Protection WV 2YMa, 2YMb, 2YMc, 2YMn) voltage switching device I is wired to, finally export second protection and survey
Amount voltage, provides second protection measurement voltage for the high-tension switch cabinet protection device, and can see simultaneously on voltage switching device I
II mother protection voltage indicator lamp LD2 light.
At the same time, the 7th normal opened contact 235 and the 8th normal opened contact 236 of II mothers isolation switch QS2 auxiliary switches is closed
Close, the second coil 4YQ of the II mother's secondary voltage switching relays on voltage switching device II obtains electric, and its normal opened contact is closed,
Now from II female PT secondary voltages by WV (i.e. the little bus 4YMa of II mother's PT metered voltages, 4YMb, 4YMc,
Voltage switching device II 4YMn) is wired to, and is finally exported secondary measurement voltage, secondary meter is provided for the high-tension switch cabinet electric energy meter
Amount voltage, and can see that the mother metered voltage display lamp LD4 of the II on voltage switching device II are lighted simultaneously.
It can be seen that, the I mother's protection electricity under normal circumstances, after I mother's isolation switch QS1 close a floodgate, on voltage switching device I
Pressure display lamp LD1 is lit, and the I mother metered voltage display lamp LD3 on voltage switching device II are lit.II mother's isolation switch
After QS2 closes a floodgate, the II mother protection voltage indicator lamp LD2 on voltage switching device I are lit, in voltage switching device II
On II mother metered voltage display lamp LD4 be lit, voltage switching device I and voltage switching device II will gather come I mother PT
With the secondary voltage of II mother PT, Jing after voltage switching, the second protection being respectively needed for this high-tension switch cabinet relevant device is provided
Measurement voltage and secondary measurement voltage.That is, the high-tension switch cabinet powered for arbitrary double-bus, either second protection
Measurement voltage or secondary measurement voltage, the secondary voltage that I is female and II mothers PT is next pass through bus isolation switch auxiliary switch control
The voltage switching device of system, completes collection, switching and the output of the secondary voltage next to PT, finally determines by which section bus
PT secondary voltages power.
The either Loop Closing Operation in the case of on-load, under the conditions of possessing cyclization, by current I mother isolation switch QS1
Down to being powered by II mother isolation switch QS2, now first should close II mother isolation switch QS2, then separately I mothers isolation switch for power supply
QS1；Or in cut-off breaker, it is zero load in the case of non-Loop Closing Operation, by current I mother isolation switch QS1 power down to
Powered by II mother isolation switch QS2, now, should first separate I mother isolation switch QS1, then the II mother isolation switch QS2 that close.If
After II mother's isolation switch QS2 close a floodgate, the corresponding electric terminal loop of its auxiliary switch cannot normally closed.Conversely, being supplied by II is female
Down to being powered by I is female, after I mother's isolation switch QS1 close a floodgate, the corresponding electric terminal of auxiliary switch of I mother isolation switch QS1 is returned electricity
Road cannot normally closed.Under two kinds of grid switching operation modes, because the corresponding contact circuit closed of auxiliary switch is bad, double mothers can be all made
Secondary voltage switching device decompression when line isolation switch is operated, affects the correct operation and electricity of high-tension switch cabinet protective relaying device
The accuracy of energy meter amount.
In order to solve the above problems, the embodiment of the present invention discloses the PT secondary voltage switching circuits that a kind of double-bus is powered
Protective loop, for protecting double bus isolation from the decompression problem of switch operation secondary voltage switching device, refer to Fig. 3-5, institute
Disclosed protective loop includes permutator and Duo Gen connecting wires.
Wherein, permutator is provided with four groups of auxiliary normal opened contacts, respectively first group auxiliary normal opened contact, second group it is auxiliary
Help normal opened contact, the 3rd group of auxiliary normal opened contact and the 4th group of auxiliary normal opened contact.Wherein, first group of auxiliary normal opened contact includes
First contact (i.e. contact 1.) and the second contact (i.e. contact 2.)；Second group of auxiliary normal opened contact includes the 3rd contact (i.e. contact
) and the 4th contact (i.e. contact 4.) 3.；3rd group of auxiliary normal opened contact includes the 5th contact (i.e. contact 5.) and the 6th contact is (i.e.
Contact is 6.)；4th group of auxiliary normal opened contact includes the 7th contact (i.e. contact 7.) and the 8th contact (i.e. contact 8.).
Permutator has three kinds of working conditions, is the first working condition, the second working condition and the 3rd work shape respectively
State.Wherein, the first working condition is I mother's combined floodgate gears, under the first working condition, the first contact and the second contact,
3rd contact and the 4th contact, the 5th contact and the 6th contact disconnect, and the 7th contact and the disconnection of the 8th contact, i.e. contact are 1.
2. connect with contact, 4. 3. contact is connected with contact, 6. 5. contact is disconnected with contact, 8. 7. contact is disconnected with contact.
To stop gear, under the second working condition, the first contact and the second contact disconnect second working condition, and the 3rd
Contact and the 4th contact disconnect, and the 5th contact is disconnected with the 6th contact, the 7th contact and the disconnection of the 8th contact, i.e. contact 1. with connect
2. point disconnects, and 4. 3. contact is disconnected with contact, and 6. 5. contact is disconnected with contact, and 8. 7. contact is disconnected with contact.
3rd working condition is II mother's combined floodgate gears, and under the 3rd working condition, the first contact and the second contact disconnect,
3rd contact and the disconnection of the 4th contact, the 5th contact and the 6th contact, the 7th contact and the 8th contact, i.e. contact are 1.
2. disconnect with contact, i.e., 4. 3. contact is disconnected with contact, 6. 5. contact is connected with contact, 8. 7. contact is connected with contact.
In the embodiment of the present application, permutator can be fixed on high-tension switch cabinet Terminal control cabinet inner terminal row by guide rail
Interval location between 83D and terminal block 84D.Under normal operation, permutator is placed in the second working condition, i.e. lock catch
Position.
In the embodiment of the present application, the DC source of the PT secondary voltage switching circuits that double-bus is powered is surveyed by second protection
The first DC power supply switch 83K controls of amount voltage switching circuit and the break-make of the protection voltage switching circuit shown in Fig. 1；
DC source is controlled by the second DC power supply switch 84K of secondary measurement voltage switching circuit and the metering electricity shown in Fig. 2
The break-make of pressure switching circuit.DC source is connected to the power supply connection of voltage switching device I by the first DC power supply switch 83K
End, as a same reason, DC source is connected to the power connector end of voltage switching device II by the second DC power supply switch 84K.
In permutator disclosed in the embodiment of the present application, 1. contact is connected to the load side of the first DC power supply switch 83K
First gone with the auxiliary switch of I mother isolation switch QS1 on (meaning being connected) second protection measurement voltage switching device 8n
On binding post 83D1 between normal opened contact 223,2. contact is connected to the auxiliary switch of I mother isolation switch QS1 and goes secondary guarantor
The second normal opened contact 224 in shield measurement voltage switching device (i.e. voltage switching device I) and the female guarantors of I on voltage switching device I
On binding post 83D3 between shield measurement voltage indicator lamp LD1.
The auxiliary switch of load side and I mother isolation switch QS1 that 3. contact is connected to the second DC power supply switch 84K goes two
On the binding post 84D1 between the 3rd normal opened contact 233 on voltage switching device II, 4. contact is connected to I mother's isolation switch
The 4th normal opened contact 234 that the auxiliary switch of QS1 is gone on voltage switching device II is electric with the female meterings of I on voltage switching device II
On binding post 84D3 between pressure display lamp LD3.
The auxiliary switch of load side and II mother isolation switch QS2 that 5. contact is connected to the first DC power supply switch 83K goes
On the binding post 83D1 between the 5th normal opened contact 225 on voltage switching device I, 6. contact is connected to II mother's isolation switch
The 6th normal opened contact 226 that the auxiliary switch of QS2 is gone on voltage switching device I is surveyed with the female protections of II on voltage switching device I
On binding post 83D4 between amount voltage indicator lamp LD2.
The auxiliary switch of load side and II mother isolation switch QS2 that 7. contact is connected to the second DC power supply switch 84K goes
On the binding post 84D1 between the 7th normal opened contact 235 on voltage switching device II, 8. contact is connected to II mother's isolation knifes
The 8th normal opened contact 236 that the auxiliary switch of lock QS2 is gone on voltage switching device II is counted with the II mothers on voltage switching device II
On binding post 84D4 between amount voltage indicator lamp LD4.
Each contact is connected with corresponding binding post by connecting wire above, i.e.,；First contact, described
Two point, the 3rd contact, the 4th contact, the 5th contact, the 6th contact, the 7th contact and described
8th contact is connected with the corresponding binding post by the connecting wire.It should be noted that described first connects
Point and the 5th contact, the 3rd contact and the 7th contact, on the auxiliary switch of isolation switch or in terminal block
It is upper to be connected in parallel respectively.Specifically, connecting wire can adopt 2.5mm2Only stock copper cash.The disclosed switching of the present embodiment
Switch can have rotating handles, by rotating the switching that switching handle is realized between changer each working condition, be in
Under second working condition, switching handle is in zero degree position, and rotating handles is rotated by 90 ° to the right, can realize that I is female and close a floodgate, Jin Ershi
Existing changer switches to the first working condition from the second working condition.Rotating handles is rotated by 90 ° to the left, can be realized that II is female and be closed
Lock, and then realize that changer switches to the 3rd working condition from the second working condition.
The course of work of protection circuit disclosed in the embodiment of the present invention is as follows：
After I mother's isolation switch QS1 close a floodgate, if the corresponding electric terminal loop of its auxiliary switch cannot close, it can be seen that
I mother's metered voltage display lamps on the I mother protection voltage indicator lamp LD1 and voltage switching device II of voltage switching device I
LD3 is non-lit up, shows the non-normally closed of corresponding contact of the auxiliary switch of I mother's isolation switch.That is the first normal opened contact 223
It is not closed with the second normal opened contact 224, the 3rd normal opened contact 233 and the 4th normal opened contact 234 it is also not closed.Now need to change
The operation conversion handle of switch is rotated by 90 ° to I mother's combined floodgate gears to the right by gear is stopped, then the contact of permutator 1. with contact
2., 4. 3. contact is respectively closed with contact, wherein, 2. 1. contact is closed with contact, the converted switches of DC power anode+KM
Contact 1. with contact 2., the I mother's protection voltage indicator lamp LD1 and I mother's secondary voltages connected on voltage switching device I are cut
First coil 1YQ of relay is changed, finally to DC power cathode-KM, then I mothers secondary voltage switching in voltage switching device I
First coil 1YQ of relay obtains electric, and its corresponding normal opened contact closure has connected protection voltage circuit, meanwhile, voltage is cut
I mother protection voltage indicator lamp LD1 on changing device I are lit；4. 3. contact is closed with contact, DC power anode+KM
3. with contact 4., I mother metered voltage the display lamp LD3 and I connected on voltage switching device II is female for the contact of converted switch
Secondary voltage switches the second coil 3YQ of relay, and finally to DC power cathode-KM, then the I in voltage switching device II is female
Second coil 3YQ of secondary voltage switching relay obtains electric, and its corresponding normal opened contact closure has connected metered voltage loop, together
When, the I mother metered voltage display lamp LD3 of voltage switching device II are lit.
In the same manner, after II mother's isolation switch QS2 close a floodgate, if the corresponding electric terminal loop of its auxiliary switch cannot close,
Can also see that the female meterings of II on the II mother protection voltage indicator lamp LD2 and voltage switching device II of voltage switching device I
Voltage indicator lamp LD4 is non-lit up, show II mother isolation switch auxiliary switch the non-normally closed of corresponding contact, i.e., the 5th
Normal opened contact 225 is not closed with the 6th normal opened contact 226, and the 7th normal opened contact 235 and the 8th normal opened contact 236 are also not closed.
Now need for the operation conversion handle of permutator to be rotated by 90 ° combined floodgate gear female to II to the left by gear is stopped, then permutator
Two groups of contacts 5. with contact 6., contact 7. 8. respectively close with contact, wherein 6. 5. contact is closed with contact, DC source
5. with contact 6., the II mother's protection voltages connected on voltage switching device I are indicated the contact of the converted switches of positive pole+KM
Lamp LD2, II mother's secondary voltage switches first coil 2YQ of relay, and finally to DC power cathode-KM, then voltage switching is filled
First coil 2YQ for putting the mother's secondary voltage switching relays of the II in I obtains electric, and its corresponding normal opened contact closure has been connected protection and surveyed
Amount voltage circuit, meanwhile, the II mother protection voltage indicator lamp LD2 on voltage switching device I are lit；Contact 7. with contact
8. close, 7. with contact 8., the II connected on voltage switching device II is female for the contact of the converted switches of DC power anode+KM
Metered voltage display lamp LD4, II mother's secondary voltage switches the second coil 4YQ of relay, finally to DC negative supply-KM, then
Second coil 4YQ of the II mother's secondary voltage switching relays in voltage switching device II obtains electric, its corresponding normal opened contact closure
Metered voltage loop has been connected, meanwhile, the II mother metered voltage display lamp LD4 on voltage switching device II are lit.
In the protective loop of the PT secondary voltage switching circuits that the double-bus disclosed in the embodiment of the present invention is powered, unidirectional current
The supply voltage in source can be 220V.
Herein, only emphasis describes different with other schemes to each preferred version, as long as each preferred version
Do not conflict, can combination in any, the embodiment formed after combination is also within category disclosed in this specification, it is contemplated that
Text is succinct, herein with regard to no longer individually being described to combining formed embodiment.
The above is only the specific embodiment of the present invention, is made skilled artisans appreciate that or realizing this
It is bright.Various modifications to these embodiments will be apparent to one skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (5)
1. the protective loop of the PT secondary voltage switching circuits that double-bus is powered, it is characterised in that including permutator and Duo Gen
Connecting wire；Wherein：
The permutator includes first group of auxiliary normal opened contact, second group of auxiliary normal opened contact, the 3rd group of auxiliary normal opened contact
With the 4th group of auxiliary normal opened contact；Wherein, first group of auxiliary normal opened contact includes the first contact and the second contact；Second group of auxiliary
Normal opened contact includes the 3rd contact and the 4th contact；3rd group of auxiliary normal opened contact includes the 5th contact and the 6th contact；4th
Group auxiliary normal opened contact includes the 7th contact and the 8th contact；
The permutator has three working conditions, respectively the first working condition, the second working condition and the 3rd work shape
State；Wherein, first working condition is I mother's combined floodgate gears, under first working condition, first contact and institute
The second contact, the 3rd contact and the 4th contact are stated, the 5th contact is disconnected with the 6th contact,
7th contact is disconnected with the 8th contact；Second working condition is stopping gear, in the described second work shape
Under state, first contact is disconnected with second contact, and the 3rd contact is disconnected with the 4th contact, and the described 5th connects
Point is disconnected with the 6th contact, and the 7th contact is disconnected with the 8th contact；3rd working condition is that II is female closes
Lock gear, under the 3rd working condition, first contact is disconnected with second contact, the 3rd contact and institute
State the disconnection of the 4th contact, the 5th contact and the 6th contact, the 7th contact and the 8th contact；
The PT secondary voltage switching circuits that the double-bus is powered include second protection measurement voltage switching circuit and secondary measurement
Voltage switching circuit.First contact is connected to the first DC power supply switch that the second protection measures voltage switching circuit
Load side and I mother isolation switch auxiliary switch go second protection measurement voltage switching device on the first normal opened contact between
Binding post on, second contact is connected to the auxiliary switch of I mother's isolation switch and goes second protection measurement voltage to cut
On the binding post between the second normal opened contact and I mother's protection voltage indicator lamp on changing device；
The load side that 3rd contact is connected to the second DC power supply switch of the secondary measurement voltage switching circuit is female with I
It is on binding post between the 3rd normal opened contact that the auxiliary switch of isolation switch is gone on secondary measurement voltage switching device, described
4th contact is connected to the auxiliary switch of I mother's isolation switch and goes the 4th of the secondary measurement voltage switching device normally opened to connect
On binding post between point and I mother's metered voltage display lamps；
The auxiliary switch of load side and II mother's isolation switch that the 5th contact is connected to first DC power supply switch goes
On the binding post between the 5th normal opened contact on the second protection measurement voltage switching device, the 6th contact connection
The 6th normal opened contact gone on second protection measurement voltage switching device in the auxiliary switch of II mother's isolation switch with
On binding post between II mother's protection voltage indicator lamps；
The auxiliary of load side and II mother's isolation switch that the 7th contact is connected to second DC power supply switch is opened
On binding post between the 7th normal opened contact that pass is gone on the secondary measurement voltage switching device, the 8th contact connection
The 8th normal opened contact gone on the secondary measurement voltage switching device in the auxiliary switch of II mother's isolation switch is female with II
On binding post between metered voltage display lamp；
First contact, second contact, the 3rd contact, the 4th contact, the 5th contact, the described 6th
Contact, the 7th contact and the 8th contact are connected with the corresponding binding post by the connecting wire.
2. protective loop according to claim 1, it is characterised in that the connecting wire is only stock copper cash.
3. protective loop according to claim 2, it is characterised in that the connecting wire is 2.5mm2Only stock copper cash.
4. protective loop according to claim 1, it is characterised in that first contact is in parallel with the 5th contact even
Connect, the 3rd contact is connected in parallel with the 7th contact.
5. the PT secondary voltage switching circuits that double-bus is powered, it is characterised in that including arbitrary described guarantor in claim 1-4
Shield loop.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710003531.XA CN106532904B (en) | 2017-01-04 | 2017-01-04 | PT secondary voltage switching circuit with double bus power supply and protection circuit thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710003531.XA CN106532904B (en) | 2017-01-04 | 2017-01-04 | PT secondary voltage switching circuit with double bus power supply and protection circuit thereof |
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| CN106532904A true CN106532904A (en) | 2017-03-22 |
| CN106532904B CN106532904B (en) | 2023-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710003531.XA Active CN106532904B (en) | 2017-01-04 | 2017-01-04 | PT secondary voltage switching circuit with double bus power supply and protection circuit thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106712017A (en) * | 2017-03-30 | 2017-05-24 | 山东钢铁股份有限公司 | Double-bus secondary voltage switching circuit and self-holding circuit thereof |
| CN108023351A (en) * | 2018-01-11 | 2018-05-11 | 山东钢铁股份有限公司 | The method and system of falling busbar of double-bus power supply |
| CN108152579A (en) * | 2018-02-02 | 2018-06-12 | 山东钢铁股份有限公司 | Voltage transformer secondary metered voltage and column circuits |
| CN108390379A (en) * | 2018-05-08 | 2018-08-10 | 河南森源电气股份有限公司 | A kind of device of sectionalized single busbar connection PT systems and anti-power transmission when preventing PT from overhauling |
| CN117665386A (en) * | 2024-02-01 | 2024-03-08 | 湖南华菱湘钢节能发电有限公司 | Dual-loop line-in meter measuring method for gateway of total drop substation of steel plant |
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| CN206364576U (en) * | 2017-01-04 | 2017-07-28 | 山东钢铁股份有限公司 | PT secondary voltages switching circuit and its protective loop that double-bus is powered |
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| CN106712017A (en) * | 2017-03-30 | 2017-05-24 | 山东钢铁股份有限公司 | Double-bus secondary voltage switching circuit and self-holding circuit thereof |
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| CN108023351A (en) * | 2018-01-11 | 2018-05-11 | 山东钢铁股份有限公司 | The method and system of falling busbar of double-bus power supply |
| CN108152579A (en) * | 2018-02-02 | 2018-06-12 | 山东钢铁股份有限公司 | Voltage transformer secondary metered voltage and column circuits |
| CN108152579B (en) * | 2018-02-02 | 2024-02-02 | 山东钢铁股份有限公司 | Secondary metering voltage parallel circuit of voltage transformer |
| CN108390379A (en) * | 2018-05-08 | 2018-08-10 | 河南森源电气股份有限公司 | A kind of device of sectionalized single busbar connection PT systems and anti-power transmission when preventing PT from overhauling |
| CN117665386A (en) * | 2024-02-01 | 2024-03-08 | 湖南华菱湘钢节能发电有限公司 | Dual-loop line-in meter measuring method for gateway of total drop substation of steel plant |
| CN117665386B (en) * | 2024-02-01 | 2024-05-07 | 湖南华菱湘钢节能发电有限公司 | Dual-loop line-in meter measuring method for gateway of total drop substation of steel plant |
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| CN106532904B (en) | 2023-07-07 |
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