CN107728009A - T-shaped transmission line malfunction indicates system - Google Patents

T-shaped transmission line malfunction indicates system Download PDF

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Publication number
CN107728009A
CN107728009A CN201711225314.1A CN201711225314A CN107728009A CN 107728009 A CN107728009 A CN 107728009A CN 201711225314 A CN201711225314 A CN 201711225314A CN 107728009 A CN107728009 A CN 107728009A
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CN
China
Prior art keywords
current transformer
sides
transmission line
power supply
logical value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201711225314.1A
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Chinese (zh)
Inventor
邵亮
李澄
严伟
严慧
黄瑜
高阳
王皓
王涛
李欣哲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Wuxi Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
Original Assignee
State Grid Corp of China SGCC
Wuxi Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Wuxi Power Supply Co of State Grid Jiangsu Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201711225314.1A priority Critical patent/CN107728009A/en
Publication of CN107728009A publication Critical patent/CN107728009A/en
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead

Abstract

The present invention provides a kind of T-shaped transmission line malfunction instruction system, and for detecting the failure of T-shaped transmission line of electricity, the T-shaped transmission line of electricity using Q as node is connected to the side of M, N, P tri-；The M sides of T-shaped transmission line of electricity set switch KM, the N sides of T-shaped transmission line of electricity set switch KN, the P sides of T-shaped transmission line of electricity set switch KP；Side set direction current transformer C at Q on branched line MQM, side set direction current transformer C at Q on branched line NQN, side set direction current transformer C at Q on branched line PQP；Each current transformer connects an indicating fault instrument；Each Current Transformer Secondary value is obtained, is started using jump-value of current, when jump-value of current is more than setting value, it is 1 to put corresponding current transformer logical value, is otherwise 0；Under different power supply modes, when T-shaped transmission line of electricity breaks down, it is out of order by the identification of abort situation logic discrimination table on branch MQ or NQ or PQ or node Q.The system can shorten the line walking time of work about electric power personnel.

Description

T-shaped transmission line malfunction indicates system
Technical field
The present invention relates to power system automation technology field, especially a kind of fault-indicating system.
Background technology
With power network strongization in geographic coverage, intellectuality, scale and information-based fast-developing, 110kV voltages T-shaped wiring transmission line is widely present in hierarchical network.After line failure, due to complex circuit and the method for operation not One, transmission of electricity track walker generally requires to take considerable time carries out line walking to whole piece circuit, it is difficult to finds accurate failure in time Position.When being broken down for branch'ses (including node) of T links, fault branch (including node) information is obtained, is directed to Fault branch line walking is carried out to property, can necessarily shorten circuit repair time, and restore electricity in time.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided a kind of T-shaped transmission line malfunction instruction System, work about electric power personnel can be facilitated to T-shaped polling transmission line, the line walking time of shortening work about electric power personnel.The present invention The technical scheme of use is：
A kind of T-shaped transmission line malfunction instruction system, for detecting the failure of T-shaped transmission line of electricity, its main improvements It is,
T-shaped transmission line of electricity using Q as node is connected to the side of M, N, P tri-；The M sides of T-shaped transmission line of electricity set switch KM, it is T-shaped defeated The N sides of electric line set switch KN, the P sides of T-shaped transmission line of electricity set switch KP；
Side set direction current transformer C at Q on branched line MQM, side set direction current transformer at Q on branched line NQ CN, side set direction current transformer C at Q on branched line PQP；Each current transformer connects an indicating fault instrument；
The current transformer with direction is all provided with node Q three sides, each Current Transformer Secondary value is obtained, is dashed forward using electric current Variable starts, and when jump-value of current is more than setting value, it is 1 to put corresponding current transformer logical value, is otherwise 0；In different confessions Under electrically, when T-shaped transmission line of electricity breaks down, by abort situation logic discrimination table identification be out of order branch MQ or NQ, Or on PQ or node Q.
Further, directional current transformer C is takenM、CN、CPIt is positive direction to point to node Q, and sensing branched line is losing side To.
Further,
When single supply supplies the power supply mode of both sides load, M sides set power supply EM, N sides are load SN, P sides are load SP, three sides Switch KM、KN、KPRun；M sides power supply EMThe load S of N, P both sides is supplied by T-shaped transmission line of electricityN、SP；
The abort situation logical value of abort situation logic discrimination table is：When short trouble occurs on branch MQ, electric current is mutual The logical value of sensor：CMFor 0, CNFor 0, CPFor 0；When short trouble occurs on branch NQ, the logical value of current transformer：CM For+1, CNFor -1, CPFor 0；When short trouble occurs on branch PQ, the logical value of current transformer：CMFor+1, CNFor 0, CP For -1；When short trouble occurring at node Q, the logical value of current transformer：CMFor+1, CNFor 0, CPFor 0.
When single supply supplies the power supply mode of side load, M sides set power supply EM, N sides are load SN, P sides are load SP, M sides electricity Source EMThe load S of P sides is supplied by T-shaped transmission line of electricityP；Switch KM、KPRun, switch KNStand-by heat；
The abort situation logical value of abort situation logic discrimination table is：When short trouble occurs on branch MQ, electric current is mutual The logical value of sensor：CMFor 0, CNFor 0, CPFor 0；When short trouble occurs on branch NQ, the logical value of current transformer：CM For+1, CNFor -1, CPFor 0；When short trouble occurs on branch PQ, the logical value of current transformer：CMFor+1, CNFor 0, CP For -1；When short trouble occurring at node Q, the logical value of current transformer：CMFor+1, CNFor 0, CPFor 0.
Dual power supply supplies the power supply mode of side load simultaneously when, M sides set power supply EM, N sides set power supply EN, P sides are load SP； Power supply EM、ENThe load S of P sides is supplied by T-shaped transmission line of electricityP；Switch KM、KN、KPRun；
The abort situation logical value of abort situation logic discrimination table is：When short trouble occurs on branch MQ, electric current is mutual The logical value of sensor：CMFor -1, CNFor+1, CPFor 0；When short trouble occurs on branch NQ, the logical value of current transformer： CMFor+1, CNFor -1, CPFor 0；When short trouble occurs on branch PQ, the logical value of current transformer：CMFor+1, CNFor+1, CPFor -1；When short trouble occurring at node Q, the logical value of current transformer：CMFor+1, CNFor+1, CPFor 0.
When side power supply supplies the power supply mode of side load, opposite side power backup in dual power supply, M sides set power supply EM, N sides If power supply EN, P sides are load SP；Power supply EMThe load S of P sides is supplied by T-shaped transmission line of electricityP；Switch KM、KPRun, switch KN Stand-by heat；
The abort situation logical value of abort situation logic discrimination table is：When short trouble occurs on branch MQ, electric current is mutual The logical value of sensor：CMFor 0, CNFor 0, CPFor 0；When short trouble occurs on branch NQ, the logical value of current transformer：CM For+1, CNFor -1, CPFor 0；When short trouble occurs on branch PQ, the logical value of current transformer：CMFor+1, CNFor 0, CP For -1；When short trouble occurring at node Q, the logical value of current transformer：CMFor+1, CNFor 0, CPFor 0.
Advantages of the present invention：
1) can solve the problems, such as T-shaped transmission line malfunction branch uncertainty.
2) the line walking time of work about electric power personnel can be shortened.
3) the instruction system access power system is convenient, reliable.
Brief description of the drawings
Fig. 1 is the switch summation current transformer schematic view of the mounting position of the present invention.
Fig. 2 is the indicating fault instrument schematic appearance of the present invention.
Fig. 3 is the wiring diagram of power supply mode one of the present invention.
Fig. 4 is the wiring diagram of power supply mode two of the present invention.
Fig. 5 is the wiring diagram of power supply mode three of the present invention.
Fig. 6 is the wiring diagram of power supply mode four of the present invention.
Fig. 7 is the indicating fault instrument program flow diagram of the present invention.
Embodiment
With reference to specific drawings and examples, the invention will be further described.
In Fig. 1, using one-line format expression three-phase system, the T-shaped transmission line of electricity in Fig. 1 using Q as node is connected to M, N, P Three sides.KMSwitched for the M sides of T-shaped transmission line of electricity, KNSwitched for the N sides of T-shaped transmission line of electricity, KPOpened for the P sides of T-shaped transmission line of electricity Close, andSwitch running status is represented,Represent switch hot stand-by duty.CMFor the side of side at Q on branched line MQ To current transformer, CNFor the directional current transformer of side at Q on branched line NQ, CPFor the direction of side at Q on branched line PQ Current transformer.Current Transformer Secondary data are transmitted to the transformer station of M sides by optical-fibre channel, and are connected to indicating fault Instrument.
Fig. 2 shows a kind of indicating fault instrument, wherein, 1, LCDs；2, power switch；3, power interface；4, CM Secondary A phase currents electric current input；5, CMQuadratic B phase current inputs；6, CMSecondary C phase currents input；7, CNSecondary A phase currents are defeated Enter；8, CNQuadratic B phase current inputs；9, CNSecondary C phase currents input；10, CPSecondary A phase currents input；11, CPQuadratic B is mutually electric Stream input；12, CPSecondary C phase currents input.
The operation principle of indicating fault instrument：The current transformer with direction is all provided with node Q three sides, it is mutual to obtain each electric current The sub-value of sensor two, is started using jump-value of current, when jump-value of current is more than setting value, puts corresponding current transformer logical value It is otherwise 0 for 1；Take directional current transformer CM、CN、CPIt is positive direction to point to node Q, and sensing branched line is negative direction. Under different power supply modes, when T-shaped transmission line of electricity breaks down, it is out of order by the identification of abort situation logic discrimination table in branch On MQ, NQ, PQ or node Q.
In actual regional scope, the T-shaped transmission line of electricity application in 110kV voltage class power networks is very extensive.T-shaped transmission of electricity Circuit is divided into single-side power and bilateral source power supply, and needs to consider that wherein side mains side is standby in bilateral source network Situation.Its power supply mode mainly has four kinds：First, single supply supplies both sides load；2nd, single supply supplies side load；3rd, dual power supply is same When supply side load；4th, side power supply supplies side load, opposite side power backup in dual power supply.
It is as follows that operation principle is sketched according to four kinds of power supply modes：
1st, mode one
Mode one is the power supply mode that single supply supplies both sides load, as shown in Figure 3；M sides set power supply EM, N sides are load SN, P Side is load SP, three sides switch KM、KN、KPRun；M sides power supply EMThe load S of N, P both sides is supplied by T-shaped transmission line of electricityN、SP；
Table 1 is in power supply mode abort situation logical value for the moment.When short trouble occurs on branch MQ, Current Mutual Inductance The logical value of device：CMFor 0, CNFor 0, CPFor 0；When short trouble occurs on branch NQ, the logical value of current transformer：CMFor+ 1, CNFor -1, CPFor 0；When short trouble occurs on branch PQ, the logical value of current transformer：CMFor+1, CNFor 0, CPFor -1； When short trouble occurring at node Q, the logical value of current transformer：CMFor+1, CNFor 0, CPFor 0.(N sides are that power supply is born for M sides Lotus SMWith P sides load SPPower supply mode with mode one)；
The power supply mode one of table 1
2nd, mode two
Mode two is the power supply mode that single supply supplies side load, as shown in Figure 4；M sides set power supply EM, N sides are load SN, P Side is load SP, M sides power supply EMThe load S of P sides is supplied by T-shaped transmission line of electricityP；Switch KM、KPRun, switch KNStand-by heat； The same Fig. 1 of remaining element；
Table 2 is the abort situation logical value in power supply mode two.When short trouble occurs on branch MQ, Current Mutual Inductance The logical value of device：CMFor 0, CNFor 0, CPFor 0；When short trouble occurs on branch NQ, the logical value of current transformer：CMFor+ 1, CNFor -1, CPFor 0；When short trouble occurs on branch PQ, the logical value of current transformer：CMFor+1, CNFor 0, CPFor -1； When short trouble occurring at node Q, the logical value of current transformer：CMFor+1, CNFor 0, CPFor 0.(N sides power supply ENFor P sides Load SPPower supply mode with mode two)；
The power supply mode two of table 2
3rd, mode three
Mode three is the power supply mode that dual power supply supplies side load simultaneously, as shown in Figure 5；M sides set power supply EM, N sides set electricity Source EN, P sides are load SP；Power supply EM、ENThe load S of P sides is supplied by T-shaped transmission line of electricityP；Switch KM、KN、KPRun；Remaining member The same Fig. 1 of part；
Table 3 is the abort situation logical value in power supply mode three.When short trouble occurs on branch MQ, Current Mutual Inductance The logical value of device：CMFor -1, CNFor+1, CPFor 0；When short trouble occurs on branch NQ, the logical value of current transformer：CM For+1, CNFor -1, CPFor 0；When short trouble occurs on branch PQ, the logical value of current transformer：CMFor+1, CNFor+1, CP For -1；When short trouble occurring at node Q, the logical value of current transformer：CMFor+1, CNFor+1, CPFor 0.
The power supply mode three of table 3
4th, mode four
Mode four is that side power supply is for side load, the power supply mode of opposite side power backup in dual power supply, such as Fig. 6 institutes Show；M sides set power supply EM, N sides set power supply EN, P sides are load SP；Power supply EMThe load S of P sides is supplied by T-shaped transmission line of electricityP；Switch KM、KPRun, switch KNStand-by heat；The same Fig. 1 of remaining element；
Table 4 is the abort situation logical value in power supply mode four.When short trouble occurs on branch MQ, Current Mutual Inductance The logical value of device：CMFor 0, CNFor 0, CPFor 0；When short trouble occurs on branch NQ, the logical value of current transformer：CMFor+ 1, CNFor -1, CPFor 0；When short trouble occurs on branch PQ, the logical value of current transformer：CMFor+1, CNFor 0, CPFor -1； When short trouble occurring at node Q, the logical value of current transformer：CMFor+1, CNFor 0, CPFor 0.(power supply ENFor the load of P sides SPPower supply mode with mode four)；
The power supply mode four of table 4
It is the discrimination principles of fault branch or malfunctioning node in the indicating fault instrument under different power supply modes above, failure refers to Show instrument operation principle flow chart as shown in fig. 7, mainly comprising the following steps：
1st, start；
2nd, three current transformer C are gatheredM、CN、CPSecondary data, jump-value of current reaches setting value, and startup separator refers to Show program；
3rd, whether it is power supply mode one, if so, then abort situation corresponding to executive mode one differentiates；If not power supply mode One, then whether be power supply mode two, if so, then abort situation corresponding to executive mode two differentiates；If not power supply mode two, Whether it is so power supply mode three, if so, then abort situation corresponding to executive mode three differentiates；If not power supply mode three, that Whether it is power supply mode four, if so, then abort situation corresponding to executive mode four differentiates；If not power supply mode four, then Perform output error.
4th, fault branch or malfunctioning node are exported and is shown；
5th, terminate.

Claims (6)

  1. A kind of 1. T-shaped transmission line malfunction instruction system, for detecting the failure of T-shaped transmission line of electricity, it is characterised in that
    T-shaped transmission line of electricity using Q as node is connected to the side of M, N, P tri-；The M sides of T-shaped transmission line of electricity set switch KM, T-shaped transmission line of electricity N sides set switch KN, the P sides of T-shaped transmission line of electricity set switch KP；
    Side set direction current transformer C at Q on branched line MQM, side set direction current transformer C at Q on branched line NQN, point Side set direction current transformer C at Q on branch line PQP；Each current transformer connects an indicating fault instrument；
    The current transformer with direction is all provided with node Q three sides, each Current Transformer Secondary value is obtained, using jump-value of current Start, when jump-value of current is more than setting value, it is 1 to put corresponding current transformer logical value, is otherwise 0；In different suppliers of electricity Under formula, when T-shaped transmission line of electricity breaks down, it is out of order by the identification of abort situation logic discrimination table in branch MQ or NQ or PQ Or on node Q.
  2. 2. T-shaped transmission line malfunction instruction system as claimed in claim 1, it is characterised in that
    Take directional current transformer CM、CN、CPIt is positive direction to point to node Q, and sensing branched line is negative direction.
  3. 3. T-shaped transmission line malfunction instruction system as claimed in claim 2, it is characterised in that
    When single supply supplies the power supply mode of both sides load, M sides set power supply EM, N sides are load SN, P sides are load SP, three sides switch KM、KN、KPRun；M sides power supply EMThe load S of N, P both sides is supplied by T-shaped transmission line of electricityN、SP；
    The abort situation logical value of abort situation logic discrimination table is：When short trouble occurs on branch MQ, current transformer Logical value：CMFor 0, CNFor 0, CPFor 0；When short trouble occurs on branch NQ, the logical value of current transformer：CMFor+1, CNFor -1, CPFor 0；When short trouble occurs on branch PQ, the logical value of current transformer：CMFor+1, CNFor 0, CPFor -1；Section When short trouble occurring at point Q, the logical value of current transformer：CMFor+1, CNFor 0, CPFor 0.
  4. 4. T-shaped transmission line malfunction instruction system as claimed in claim 2, it is characterised in that
    When single supply supplies the power supply mode of side load, M sides set power supply EM, N sides are load SN, P sides are load SP, M sides power supply EM The load S of P sides is supplied by T-shaped transmission line of electricityP；Switch KM、KPRun, switch KNStand-by heat；
    The abort situation logical value of abort situation logic discrimination table is：When short trouble occurs on branch MQ, current transformer Logical value：CMFor 0, CNFor 0, CPFor 0；When short trouble occurs on branch NQ, the logical value of current transformer：CMFor+1, CNFor -1, CPFor 0；When short trouble occurs on branch PQ, the logical value of current transformer：CMFor+1, CNFor 0, CPFor -1；Section When short trouble occurring at point Q, the logical value of current transformer：CMFor+1, CNFor 0, CPFor 0.
  5. 5. T-shaped transmission line malfunction instruction system as claimed in claim 2, it is characterised in that
    Dual power supply supplies the power supply mode of side load simultaneously when, M sides set power supply EM, N sides set power supply EN, P sides are load SP；Power supply EM、ENThe load S of P sides is supplied by T-shaped transmission line of electricityP；Switch KM、KN、KPRun；
    The abort situation logical value of abort situation logic discrimination table is：When short trouble occurs on branch MQ, current transformer Logical value：CMFor -1, CNFor+1, CPFor 0；When short trouble occurs on branch NQ, the logical value of current transformer：CMFor+ 1, CNFor -1, CPFor 0；When short trouble occurs on branch PQ, the logical value of current transformer：CMFor+1, CNFor+1, CPFor- 1；When short trouble occurring at node Q, the logical value of current transformer：CMFor+1, CNFor+1, CPFor 0.
  6. 6. T-shaped transmission line malfunction instruction system as claimed in claim 2, it is characterised in that
    When side power supply supplies the power supply mode of side load, opposite side power backup in dual power supply, M sides set power supply EM, N sides set electricity Source EN, P sides are load SP；Power supply EMThe load S of P sides is supplied by T-shaped transmission line of electricityP；Switch KM、KPRun, switch KNIt is hot standby With；
    The abort situation logical value of abort situation logic discrimination table is：When short trouble occurs on branch MQ, current transformer Logical value：CMFor 0, CNFor 0, CPFor 0；When short trouble occurs on branch NQ, the logical value of current transformer：CMFor+1, CNFor -1, CPFor 0；When short trouble occurs on branch PQ, the logical value of current transformer：CMFor+1, CNFor 0, CPFor -1；Section When short trouble occurring at point Q, the logical value of current transformer：CMFor+1, CNFor 0, CPFor 0.
CN201711225314.1A 2017-11-29 2017-11-29 T-shaped transmission line malfunction indicates system Pending CN107728009A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711225314.1A CN107728009A (en) 2017-11-29 2017-11-29 T-shaped transmission line malfunction indicates system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711225314.1A CN107728009A (en) 2017-11-29 2017-11-29 T-shaped transmission line malfunction indicates system

Publications (1)

Publication Number Publication Date
CN107728009A true CN107728009A (en) 2018-02-23

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Application Number Title Priority Date Filing Date
CN201711225314.1A Pending CN107728009A (en) 2017-11-29 2017-11-29 T-shaped transmission line malfunction indicates system

Country Status (1)

Country Link
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105356430A (en) * 2015-12-01 2016-02-24 国网技术学院 Active closed loop power distribution network protection system and method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105356430A (en) * 2015-12-01 2016-02-24 国网技术学院 Active closed loop power distribution network protection system and method

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