CN108390379A - A kind of device of sectionalized single busbar connection PT systems and anti-power transmission when preventing PT from overhauling - Google Patents
A kind of device of sectionalized single busbar connection PT systems and anti-power transmission when preventing PT from overhauling Download PDFInfo
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- CN108390379A CN108390379A CN201810434253.8A CN201810434253A CN108390379A CN 108390379 A CN108390379 A CN 108390379A CN 201810434253 A CN201810434253 A CN 201810434253A CN 108390379 A CN108390379 A CN 108390379A
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- switch
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- output line
- maintenance
- secondary side
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The device of anti-power transmission when the present invention relates to a kind of sectionalized single busbar connection PT systems and preventing PT from overhauling, state identical first switch of the signal output line road string equipped with disconnecting link corresponding with the first PT of the secondary side of first PT, state identical second switch of the signal output line road string equipped with disconnecting link corresponding with the 2nd PT of the secondary side of 2nd PT, when some PT needs maintenance, PT row swithes are closed, the corresponding disconnecting links of maintenance PT disconnect, the switch of the signal output line road of the secondary side of maintenance PT also will disconnect, the voltage signal of another PT can not just be transferred to the secondary side of maintenance PT, the primary side of maintenance PT also can not just incude generation high voltage, and then it avoids causing high pressure to injure service personnel.Ensure that primary side not will produce induced voltage, it is ensured that maintenance safety.The circuit structure is simple, practical, rationally, applied widely, meets safe operation, reliable, practical, cost-effective.
Description
Technical field
The device of anti-power transmission when the present invention relates to a kind of sectionalized single busbar connection PT systems and preventing PT from overhauling.
Background technology
In conventional substation, often there are two sections of inlet wires, Fig. 1 to be illustrated as a kind of common major loop list mother partition switch
Scheme.1QF indicates I section of busbar main transformer into cabinet, and 2QF indicates II section of busbar master into cabinet, and 3QF is bus connection switch.Higher level's transformer
The low tension that comes over is closed a floodgate by 1QF and 2QF combined floodgates drive load operation respectively；When 1QF or 2QF failures or separating brake, need
3QF bus connection switches are wanted to close a floodgate to drive all load operations.System is provided with 2 PT cabinets, and the protective device for corresponding section provides
Detection and protection voltage.As shown in Figure 1, I mother PT is the voltage detection device of I section of busbar, II mother PT is the voltage of II section of busbar
Detection device, I mother PT correspond to 1G disconnecting links, and II mother PT corresponds to 2G disconnecting links.When wherein one section of PT maintenance, the upper ends PT disconnecting link separates,
And the protection of this section of busbar at this time still needs to continue to run with, protective device loses voltage and can malfunction, then, it is necessary to separately
It is supplied to this section of protection to use after one section of busbar PT voltage is arranged side by side.By taking I mother's PT maintenance as an example, II mother's PT maintenance situations are female with I, when
When I mother PT needs maintenance, 1G disconnecting links need to be separated, meanwhile, to ensure that the protection of this section of busbar still needs to continue to run with, I need to be disconnected
Female lead-in circuit breaker 1QF closes bus connection switch 3QF, while starting that PT is arranged side by side, and I female protective device uses II female inspection to come side by side
Voltage is surveyed, the protective device continuous service of maintenance section is enable.But this voltage signal for drawing PT secondary sides directly to
Be easy to cause maintenance PT to the mode that uses of maintenance PT protections is influenced side by side by PT, overhaul the secondary side voltage of PT significantly on
It rises, then, maintenance PT primary sides will induce high-voltage electricity, and harm is brought to service work.
The Chinese patent document that Authorization Notice No. is CN104035003B discloses a kind of sectionalized single busbar connection PT small electricity side by side
Flow earthing wire-selecting logic decision method, wherein disclose the segmented system similar with Fig. 1, also, disclose following criterion：When
In the closure state, if I section of PT switch (i.e. the corresponding disconnecting links of I section of PT) is opened, II section of PT switchs (i.e. II section to block switch
The corresponding disconnecting links of PT) it is closed, the value of II section of PT signal is assigned to I section of PT switch；Correspondingly, if II section of PT switch is opened, I section
PT switches are closed, and the value of I section of PT signal is assigned to II section of PT switch.Although this in the way of software program control soft handover
The technological deficiency of above-mentioned appearance can be reduced to a certain extent, still, acquired and inputted, data to data involved in this method
It handles and compares and the processes such as the output of data, and wherein also relate to relevant logical operation, so, the patent disclosure
Realization method it is excessively cumbersome, and the reliability of the realization method of software program is originally just relatively low, when wherein either software
Program or hardware chip cannot achieve the switching of data and reliable output when occurring abnormal, therefore, when some busbar
When PT is overhauled, the reliability of this realization method by software program is relatively low.
Invention content
The object of the present invention is to provide a kind of sectionalized single busbar connection PT systems, to solve to realize PT data using software program
The relatively low problem of the mode reliability of output.Present invention simultaneously provides it is a kind of prevent PT from overhauling when anti-power transmission device.
To achieve the above object, the present invention includes following technical scheme.
A kind of sectionalized single busbar connection PT systems, including the first PT and the 2nd PT, the signal output of the secondary side of the first PT
It is connected by PT row swithes between the signal output line road of the secondary side of circuit and the 2nd PT, the first PT's is secondary
State identical first switch of the signal output line road string equipped with disconnecting link corresponding with the first PT of side, the 2nd PT's is secondary
State identical second switch of the signal output line road string equipped with disconnecting link corresponding with the 2nd PT of side, when some PT is overhauled
When, the corresponding disconnecting links of maintenance PT disconnect, and then the switch of the signal output line road of maintenance PT secondary sides just will disconnect.
The signal output line road of the secondary side of each PT be both provided with the state of corresponding disconnecting link identical switch always,
So, when some PT needs maintenance, PT row swithes are closed, and the corresponding disconnecting links of maintenance PT disconnect, then, maintenance PT
The switch of signal output line road of secondary side also will disconnect, i.e. the signal output line road of the secondary side of maintenance PT and the inspection
The secondary side for repairing PT disconnects, and secondary voltage is disconnected by disconnecting link position after making side by side, the voltage signal of another PT can not just pass
The defeated secondary side to maintenance PT, the primary side of maintenance PT also can not just incude generation high voltage, and then avoid to overhauling people
Member causes high pressure to injure, and ensures that primary side not will produce induced voltage, it is ensured that maintenance safety.Moreover, the realization that this programme provides
Mode is pure hardware circuit structure, and anti-power transmission is avoided the occurrence of when realizing that PT is overhauled using hardware switch identical with the state of disconnecting link
The phenomenon that, the circuit structure is simple, practical, rationally, applied widely, meets safe operation, reliable, practical, cost-effective.
Moreover, compared to the realization method using software program, i.e., without reference to data processing and compares, also patrolled without reference to relevant
Operation is collected, also, without the functional reliability for worrying software program and control chip, therefore, the utilization that this programme provides
Hardware circuit, which is realized, prevents the mode reliability of anti-power transmission high.Go out in addition, working as subelement or connection line in circuit
When existing failure, only the faulty component can be repaired, without overhauling or replacing entire circuit.
Further, the first switch is the auxiliary contact that the first PT corresponds to disconnecting link, and the second switch is institute
State the auxiliary contact that the 2nd PT corresponds to disconnecting link.
Further, the corresponding secondary small busbares of the first PT be linked into the first switch and the PT row swithes it
Between, the corresponding secondary small busbares of the 2nd PT are linked between the second switch and the PT row swithes.
Further, the first protection of setting switch, institute between the corresponding secondary small busbares of the first PT and first switch
State the second protection of setting switch between the corresponding secondary small busbares of the 2nd PT and second switch.
A kind of device of power transmission anti-when preventing PT from overhauling, including the signal output line road of the secondary side of the first PT and the 2nd PT
Secondary side signal output line road, the signal of the signal output line road of the secondary side of the first PT and the secondary side of the 2nd PT exports
It is connected by PT row swithes between circuit, the signal output line of the secondary side of the first PT road string is equipped with and the first PT pairs
Answer the identical first switch of the state of disconnecting link, the signal output line road string of the secondary side of the 2nd PT is equipped with and the 2nd PT pairs
The identical second switch of the state of disconnecting link is answered, when some PT is overhauled, the corresponding disconnecting links of maintenance PT disconnect, and then the maintenance
The switch of the signal output line road of PT secondary sides just will disconnect.
Further, the first switch is the corresponding auxiliary contact of disconnecting link of the first PT, and the second switch is
The corresponding auxiliary contact of disconnecting link of 2nd PT.
Further, the corresponding secondary small busbares of the first PT access between the first switch and the PT row swithes,
The corresponding secondary small busbares of 2nd PT access between the second switch and the PT row swithes.
Further, in order to be played a certain protective role to signal output line road, the first PT is corresponding secondary small
The first protection of setting switch, sets between the corresponding secondary small busbar of the 2nd PT and second switch between busbar and first switch
Set the second protection switch.
Description of the drawings
Fig. 1 is a kind of common major loop list mother partition system schematic；
Fig. 2 is sectionalized single busbar connection PT circuit system structural schematic diagrams.
Specific implementation mode
Sectionalized single busbar connection PT system embodiments
The present embodiment provides a kind of sectionalized single busbar connection PT systems, and the PT systems are in addition to being suitable for 10kV distribution shown in FIG. 1
Except system, the distribution system of other voltage class or other structures, such as the double-bus system similar with Fig. 1 are applied also for
System.
Sectionalized single busbar connection PT systems include two large divisions, the dress of anti-power transmission when being the parts PT respectively and preventing PT from overhauling
It sets, wherein the parts PT include two PT, are the first PT and the 2nd PT respectively, and the first PT is I mother PT in Fig. 1, is I section of busbar
Voltage detection device, the 2nd PT is II mother PT in Fig. 1, and for the voltage detection device of II section of busbar, I mother PT corresponds to 1G knives
Lock, II mother PT correspond to 2G disconnecting links.The connection relation of the primary side and main system of the primary side of I mother PT and II mother PT belongs to conventional
Technology, and it is unrelated with the protection point of the present invention, it just no longer illustrates here.I mother PT secondary side (1YHa, 1YHb,
1YHc) output signal outlet line, for collected voltage signal acquisition to be exported, the secondary side of II mother PT (2YHa,
2YHb, 2YHc) output signal outlet line, for collected voltage signal acquisition to be exported.
The device of anti-power transmission includes just the signal output line road and II mother PT that the secondary side of I mother PT exports when preventing PT from overhauling
Secondary side output signal output line road.So, as shown in Fig. 2, the signal output line road and II of the secondary side output of I mother PT
It is connected by PT row swithes between the signal output line road of the secondary side output of female PT.The signal of the secondary side output of I mother PT
String is equipped with first switch on outlet line, and the signal output line road string of the secondary side of II mother PT is equipped with second switch, wherein the
One switch is corresponding and identical as the on off state of 1G disconnecting links with I mother PT corresponding disconnecting link (i.e. 1G disconnecting links), and when 1G disconnecting links
When on off state changes, first switch also carries out respective change, accordingly it is also possible to indicate first switch with 1G, the 1G in Fig. 2
Represent first switch.Similarly, second switch is corresponding with II mother PT corresponding disconnecting link (i.e. 2G disconnecting links), and with the switch shape of 2G disconnecting links
State is identical, and when the on off state of 2G disconnecting links changes, second switch also carries out respective change, accordingly it is also possible to 2G come
Indicate that second switch, the 2G in Fig. 2 represent second switch.Since first switch is identical as the on off state of 1G disconnecting links, second opens
Pass is identical as the on off state of 2G disconnecting links, then, first switch is exactly the operating position signal contact of 1G disconnecting links, and second switch is just
It is the operating position signal contact of 2G disconnecting links, in the present embodiment, first switch is the auxiliary contact of 1G disconnecting links, second switch 2G
The auxiliary contact of disconnecting link, therefore, first switch will be identical always as the state of 1G disconnecting links, and second switch will be with 2G disconnecting links
State is identical always.Certainly, other than the above embodiment, first switch and the second switch can also be other embodiment party
Formula, for example realized by relevant circuit structure：First switch is identical as the state of 1G disconnecting links, the shape of second switch and 2G disconnecting links
State is identical.Therefore, identical with the status switch of 1G disconnecting links as long as meeting first switch, the status switch of second switch and 2G disconnecting links
Identical, the arbitrary embodiment of first switch and the second switch is within the scope of the invention.
Certainly, the corresponding secondary small busbares (1YMa, 1YMb, 1YMc) of I mother PT be linked into switch 1G and PT row swithes it
Between, the corresponding secondary small busbares (2YMa, 2YMb, 2YMc) of II mother PT are linked between switch 2G and PT row swithes.I is PT pairs female
The secondary small busbar answered exports voltage acquisition signal in I section of protective device, to carry out protection judgement；II mother PT corresponding two
Secondary small busbar exports voltage acquisition signal in II section of protective device, to carry out protection judgement.This partly belongs to routine techniques,
And it is unrelated with the protection point of the present invention, it just no longer illustrates here.
Further, in order to be played a certain protective role to signal output line road, as shown in Fig. 2, corresponding in I mother PT
The first protection of setting switch between secondary small busbar (1YMa, 1YMb, 1YMc) and switch 1G, for switch 1ZKK；It is PT pairs female II
The second protection of setting switch between the secondary small busbar (2YMa, 2YMb, 2YMc) answered and switch 2G, for switch 2ZKK.
Therefore, disconnecting link (1G/2G) signal of PT (1/2YHa~YHc) secondary sides through corresponding cabinet is connected to protection switch
(1ZKK/2ZKK) above corresponds to the secondary small busbar (1/2YMa~YMc) of section afterwards.
So, in Fig. 2, if without switch 1G/ switch 2G, PT can be caused rear another section of secondary voltage signal side by side
It is directly connected to the secondary side of maintenance section PT, the primary side of maintenance section PT generates induction high voltage, danger is brought to service personnel.
After switch 1G and switch 2G is arranged, when some PT is overhauled, for example when I mother's PT maintenance, PT row swithes are closed, and 1G disconnecting links are disconnected
It opens, then, the switch 1G in Fig. 2 is also disconnected, and ensures that the voltage signal of II mother's PT secondary sides can not be sent to the secondary side of I mother PT,
Ensure that the primary side of I mother PT not will produce induction high voltage, it is ensured that therefore maintenance safety seals in switch 1G/ switch 2G, can have
Effect prevents the induced voltage harm brought by the switching of PT voltages.
Specific embodiment is presented above, but the present invention is not limited to described embodiment.The base of the present invention
The circuit structure of the device of anti-power transmission when this thinking is to prevent PT from overhauling, and do not lie in the occasion of device application.It is not taking off
The change, modification, replacement and modification carried out to embodiment in the case of from the principle and spirit of the invention still fall within the present invention
Protection domain in.
The device embodiment of anti-power transmission when preventing PT from overhauling
The present embodiment provides it is a kind of prevent PT from overhauling when anti-power transmission device, which can be separately protected.Due to the dress
It sets to have been carried out in above system embodiment and describe in detail, the present embodiment just no longer illustrates.
Claims (8)
1. a kind of sectionalized single busbar connection PT systems, including the first PT and the 2nd PT, which is characterized in that the secondary side of the first PT
It is connected by PT row swithes between the signal output line road of the secondary side of signal output line road and the 2nd PT, described first
State identical first switch of the signal output line road string equipped with disconnecting link corresponding with the first PT of the secondary side of PT, described second
State identical second switch of the signal output line road string equipped with disconnecting link corresponding with the 2nd PT of the secondary side of PT, when some
When PT is overhauled, the corresponding disconnecting links of maintenance PT disconnect, and then the switch of the signal output line road of maintenance PT secondary sides will
It disconnects.
2. sectionalized single busbar connection PT systems according to claim 1, which is characterized in that the first switch is the first PT
The auxiliary contact of corresponding disconnecting link, the second switch are the auxiliary contact that the 2nd PT corresponds to disconnecting link.
3. sectionalized single busbar connection PT systems according to claim 1 or 2, which is characterized in that the corresponding secondary small mothers of the first PT
Line is linked between the first switch and the PT row swithes, and the corresponding secondary small busbares of the 2nd PT are linked into described second
Between switch and the PT row swithes.
4. sectionalized single busbar connection PT systems according to claim 3, which is characterized in that the corresponding secondary small mother of the first PT
The first protection of setting switch, is arranged between the corresponding secondary small busbar of the 2nd PT and second switch between line and first switch
Second protection switch.
5. a kind of device of power transmission anti-when preventing PT from overhauling, which is characterized in that the signal output line of the secondary side including the first PT
The signal output line road of the secondary side of road and the 2nd PT, the secondary side on the signal output line road and the 2nd PT of the secondary side of the first PT
Signal output line road between connected by PT row swithes, the signal output line of the secondary side of the first PT road string is equipped with
The signal output line road string of the identical first switch of state of disconnecting link corresponding with the first PT, the secondary side of the 2nd PT is equipped with
The identical second switch of state of disconnecting link corresponding with the 2nd PT, when some PT is overhauled, the corresponding disconnecting links of maintenance PT disconnect,
And then the switch of the signal output line road of maintenance PT secondary sides just will disconnect.
6. the device of power transmission anti-when preventing PT from overhauling according to claim 5, which is characterized in that the first switch is institute
The corresponding auxiliary contact of disconnecting link of the first PT are stated, the second switch is the corresponding auxiliary contact of disconnecting link of the 2nd PT.
7. the device of power transmission anti-when preventing PT from overhauling according to claim 5 or 6, which is characterized in that the first PT is corresponding
Secondary small busbar accesses between the first switch and the PT row swithes, described in the corresponding secondary small busbar accesses of the 2nd PT
Between second switch and the PT row swithes.
8. the device of power transmission anti-when preventing PT from overhauling according to claim 7, which is characterized in that the first PT is corresponding
The first protection of setting switch, the corresponding secondary small busbar of the 2nd PT and second switch between secondary small busbar and first switch
Between setting second protection switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810434253.8A CN108390379A (en) | 2018-05-08 | 2018-05-08 | A kind of device of sectionalized single busbar connection PT systems and anti-power transmission when preventing PT from overhauling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810434253.8A CN108390379A (en) | 2018-05-08 | 2018-05-08 | A kind of device of sectionalized single busbar connection PT systems and anti-power transmission when preventing PT from overhauling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108390379A true CN108390379A (en) | 2018-08-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810434253.8A Pending CN108390379A (en) | 2018-05-08 | 2018-05-08 | A kind of device of sectionalized single busbar connection PT systems and anti-power transmission when preventing PT from overhauling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108390379A (en) |
Citations (4)
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| CN106532904A (en) * | 2017-01-04 | 2017-03-22 | 山东钢铁股份有限公司 | Double bus-powered PT secondary voltage switching circuit and protection circuit thereof |
| 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 |
| CN206259696U (en) * | 2016-08-22 | 2017-06-16 | 中国南方电网有限责任公司超高压输电公司贵阳局 | A kind of double-bus line protective devices of integrated voltage switching |
| 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 |
-
2018
- 2018-05-08 CN CN201810434253.8A patent/CN108390379A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206259696U (en) * | 2016-08-22 | 2017-06-16 | 中国南方电网有限责任公司超高压输电公司贵阳局 | A kind of double-bus line protective devices of integrated voltage switching |
| CN106532904A (en) * | 2017-01-04 | 2017-03-22 | 山东钢铁股份有限公司 | Double bus-powered PT secondary voltage switching circuit and protection circuit thereof |
| 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 |
| 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 |
Non-Patent Citations (3)
| Title |
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| 何其新: "防止电压互感器二次反充电的措施", 《电网技术》, no. 1, pages 18 - 19 * |
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