CN103872660B - Network type protection method based on closed-loop mode operation of power network - Google Patents
Network type protection method based on closed-loop mode operation of power network Download PDFInfo
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- CN103872660B CN103872660B CN201410055250.5A CN201410055250A CN103872660B CN 103872660 B CN103872660 B CN 103872660B CN 201410055250 A CN201410055250 A CN 201410055250A CN 103872660 B CN103872660 B CN 103872660B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Abstract
A network type protection method based on closed-loop mode operation of a power network is used for a power network system which operates in a closed-loop mode. The power network system comprises multiple transformer stations and terminal units connected to the transformer stations, and is characterized in that each terminal unit comprises an intelligent controller, a breaker and a communication module, the communication module in each terminal unit is only communicated with the closest terminal unit, and the intelligent controller in each terminal unit collects the information of voltage, current, power direction, associative direction and state and the after-fault information of the breakers in the terminal unit and the adjacent terminal unit. According to the method, a peer-to-peer communication network is adopted, the terminal units on a circuit are communicated with one another, fault information of adjacent switches is collected, arbitrating is performed, and rapid positioning and isolating of a fault are realized.
Description
Technical field
The present invention relates to a kind of guard method for intelligent electric power network, particularly relate to a kind of network type guard method being applicable to that many power rings web frame runs, full circuit breaker networking.
Background technology
Power automation is the important component part of intelligent electric power network, for improve power supply reliability, expand power supply capacity and realize electric power networks high-efficiency and economic run significant.Electric power networks troubleshooting is the core content of power automation, China's distribution generally adopts the circuit of radial pattern structure, when carrying out urban network restructuring, radial line end interconnects by general employing, form hand-in-hand duplicate supply looped network structure, this mode invests saving, can improve power supply reliability again, and the network of current this structure has certain representativeness.In cable system, often also adopt the hand-in-hand looped network of duplicate supply, but adopt power network version sometimes.
Looped network or netted supply network generally carry out segmentation according to loop grid length, load density and distribution situation, how many direct coordinating of protecting with transformer station outlet of the reliability of impact power supply, investment, operational management, protection seting of segmentation.Its advantage is that the power supply of a user can come from two and above different electrical power point, and power supply reliability is higher than Radial network.
Annular or netted supply network has closed loop, and (interconnection switch is in "on" position, same user can have two and above power supply to power simultaneously) and open loop type (interconnection switch is in gate-dividing state, and same user only has a power supply to power the time in office) two kinds.Discuss operation with closed ring pattern herein.
According to traditional protection, looped network formula operation with closed ring to relaying protection setting and configuration requirement high, invest high, complexity of adjusting, high to the competency profiling of operation personnel.Or not configuration protection, adopts centerized fusion.When circuit breaks down, fault message is delivered to control centre by communication port by on-the-spot FTU, control centre is according on off state, fault detection information, Network topology, failure judgement section, issue guidance command, perform a series of automatic operation, reconstructed network, with isolated fault and the power supply recovering non-faulting section, this i.e. so-called centralized intelligence.This scheme precise control, is applicable to various complication system.But it needs the computer soft and hardware system of reliable communication channel and control centre, and it is long to complete once " location, isolation, turn confession " required time.
As China Patent No. CN200510024379.0 patent of invention, publication date is on September 20th, 2006, disclose a kind of electric power transmission network control method without main website, described electric power transmission network control method comprises: failure detection steps: corresponding feeder terminal unit detection failure power supply, and sends fault message to all feeder terminal units; Fault location step: feeder terminal unit, according to fault message, positions fault point; Fault Isolation step: fault point feeder terminal unit separating brake, and instruction downstream feeder terminal unit separating brake; Separating brake reporting step: fault point feeder terminal unit and downstream feeder terminal unit send state information; Service restoration step: open loop point closes a floodgate.Owing to not adopting master station computer in control method of the present invention, even if the communication failure of therefore indivedual feeder terminal unit and main website, control algolithm of the present invention also can minimize on use isolated fault, and whole network can not be caused to recover.In such scheme, each current feed terminal needs to send information to all current feed terminals, each current feed terminal all needs the information table setting up all current feed terminals, thus judge voluntarily to realize controlling according to the state of all current feed terminals, the inapplicable closed loop model of this technical scheme, is only suitable for all current feed terminals and communicates to each other normal situation and full circuit breaker network model.Each current feed terminal needs to send information to all current feed terminals, and each current feed terminal all needs the information table setting up all current feed terminals, and the processing time is long, and the response time is slow.
Summary of the invention
Technical problem to be solved by this invention is the deficiency overcoming above-mentioned prior art, and what provide a kind ofly responds that action is fast, terminal burden is light, the network type guard method run based on electric power networks closed loop mode of system stability.
According to a kind of network type guard method run based on electric power networks closed loop mode provided by the invention, for the electric power networks system that closed loop mode runs, described electric power networks system comprises the terminal unit that multiple transformer station is connected with described transformer station, each described terminal unit comprises intelligent controller, circuit breaker and communication module, communication module in each described terminal unit only communicates with the communication module in the described terminal unit of next-door neighbour, intelligent controller in each described terminal unit collects the fault current of the circuit breaker in this terminal unit and adjacent end unit, fault current direction, fault current relating heading, information after state and fault, described terminal unit fault current detected and the side pointed in fault current direction does not have fault current to flow out, intelligent controller in terminal unit described in this starts fast tripping protection function or overcurrent protection function, tripping operation, otherwise the intelligent controller in described terminal unit is only protected in support.
According to a kind of network type guard method run based on electric power networks closed loop mode provided by the invention, also there is following attached technical characteristic:
Preferred embodiment is: it is whole or several that each described terminal unit has in following function: fast tripping protection function, overcurrent protection function, reclosing function, electric coincidence function, successful reclosing latch-up protection function in short-term, be incorporated into quick tripping function, interlocking dead electricity time delay separating brake blocking function, dead electricity time delay separating brake not blocking function, residual voltage pulse separating brake blocking function, one-sided decompression time-delay closing function, inspection locking one-sided decompression time-delay closing function after fault.
Preferred embodiment is: when communicating normal, and break down between the circuit breaker of the described terminal unit of next-door neighbour transformer station and transformer station, protection act is as follows:
After wire-outgoing breaker in A, transformer station detects fault current, start fast tripping protection function or overcurrent protection function;
Intelligent controller in the described terminal unit of B, next-door neighbour transformer station starts fast tripping protection function or overcurrent protection function, circuit breaker trip.
Preferred embodiment is: when communicating normal, break down between the circuit breaker of described terminal unit, protection act is as follows:
A, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of side, fault point or overcurrent protection function, circuit breaker trip;
B, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of other side, fault point or overcurrent protection function, circuit breaker trip.
Preferred embodiment is: break down between the circuit breaker of described terminal unit, and communication abnormality appears in the described terminal unit from the nearest control circuit breaker of terminal unit described in fault point, and protection act is as follows:
A, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of both sides, fault point or overcurrent protection function, circuit breaker trip;
Described in B, the intelligent controller being arranged in the described terminal unit of communication abnormality and the Upstream section adjacent with communication abnormality terminal unit, the intelligent controller of terminal unit starts fast tripping protection function or overcurrent protection function, controls respective circuit breaker trip;
C, only by communication abnormality cause the intelligent controller in the described terminal unit of tripping operation to start electric coincidence function and successful reclosing latch-up protection function in short-term, breaker closing.
Preferred embodiment is: when communicating normal, break down between the circuit breaker of described terminal unit, and the breaker mechanical exception in described terminal unit, tripping, protection act is as follows:
A, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of both sides, fault point or overcurrent protection function, circuit breaker trip;
B, due to machinery abnormal, the circuit breaker tripping of the described terminal unit in steps A, with mechanical abnormal terminals unit adjoining, after the intelligent controller of the described terminal unit that is in backup status receives tripping signal, circuit breaker trip.
Preferred embodiment is: when communicating normal, breaks down between the circuit breaker of the described terminal unit of next-door neighbour transformer station and transformer station, and the breaker mechanical exception in described terminal unit, tripping, protection act is as follows:
After wire-outgoing breaker in A, transformer station detects fault current, start fast tripping protection function or overcurrent protection function;
Intelligent controller in the described terminal unit of B, next-door neighbour transformer station starts fast tripping protection function or overcurrent protection function, sends separating brake order, because machinery is abnormal, and circuit breaker tripping;
C, with the abnormal described terminal unit of machinery adjoining, after the intelligent controller of the described terminal unit that is in backup status receives tripping signal, circuit breaker trip.
Communication module in described terminal unit is communicated with the communication module in adjacent terminal unit by switch.
According to provided by the invention a kind of based on electric power networks closed loop mode run network type guard method compared with prior art tool have the following advantages: the present invention adopts the communication network of peer-to-peer; communicate mutually between terminal unit on circuit; collect the fault message of adjacent switch; make arbitration, realize quick position fault and isolated fault.Possesses following several large advantage: 1. can judge fault and the correlation of oneself by the fault current direction of this node and interdependent node and relating heading; Logical algorithm is concisely reliable, is easy to realize.2. what adopt is proactive dissemination fault message, instead of the repeating query mode in the past adopted, and speed is fast, impacts little to circuit.3. can provide reserved regimen, ensure the excision that still comparatively fast can complete fault when fault end trips unsuccessfully.4. can easily be applicable to the electric power networks of electric pressure at different levels, and need not the syndeton of worry about network and the operational mode of system.
Accompanying drawing explanation
Fig. 1 is electric power networks reduced graph of the present invention.
Fig. 2 is another kind of electric power networks reduced graph in the present invention.
Embodiment
See Fig. 1, in a kind of network type guard method run based on electric power networks closed loop mode provided by the invention, for the electric power networks system that closed loop mode runs, described electric power networks system comprises the terminal unit that multiple transformer station is connected with described transformer station, each described terminal unit comprises intelligent controller, circuit breaker and communication module, communication module in each described terminal unit only communicates with the described terminal unit of next-door neighbour, intelligent controller in each described terminal unit collects the fault current of the circuit breaker in this terminal unit and adjacent end unit, fault current direction, fault current relating heading, information after state and fault, described terminal unit fault current detected and the side pointed in fault current direction does not have fault current to flow out, the intelligent controller of terminal unit described in this starts fast tripping protection function or overcurrent protection function, circuit breaker trip, otherwise the intelligent controller of described terminal unit is only protected in support.
Each terminal unit can control all circuit breakers in a ring main unit in the present invention.Control principle and a circuit breaker similar, carry out arranging according to identical control principle.A circuit breaker given by the present invention is for convenience of description and understands, as the most basic control unit, be not limitation of the present invention, those of ordinary skill in the art according to the most basic control unit, can extend in the control unit of multiple switch composition.The main criterion source of the present invention is the fault current of circuit breaker itself and circuit breakers thereof, fault current direction and fault current relating heading; that is: when communicating normal or abnormal; the circuit breaker of fault end is except self experiencing overcurrent; that side that fault current direction is pointed to does not have fault current to flow out; start fast tripping protection function or overcurrent protection function, circuit breaker trip.Otherwise oneself is only protected in support.
In actual applications, as long as same user has two and above power supply to power all can be considered closed loop mode simultaneously.As shown in Figure 2.The circuit breaker 12,16,21 connected on the left of circuit breaker 17 in Fig. 2 can regard circuit breaker group as, and the circuit breaker 12,18,22 that right side connects also can regard circuit breaker group as.When a failure occurs it, as long as arbitrary circuit has fault current to flow into circuit breaker 17 in the circuit breaker group of left side, just can be considered and have fault current to flow into; Right side in like manner.Be equivalent to the structure of the switch that the present invention provides, the guard method of basis for estimation still given by the present invention.
In fig. 2
represent the switch being in gate-dividing state;
represent the switch being in gate-dividing state;
represent the reference direction on each limit,
represent the actual direction of overcurrent.
Intelligent controller in each described terminal unit in the present invention not only collects the fault current of the circuit breaker in this terminal unit and adjacent end unit, fault current direction and fault current relating heading, but also information after electric current and voltage, power direction, relating heading, circuit-breaker status and fault can be collected.These parameters all can as the basis for estimation of intelligent controller.
Terminal unit of the present invention only intercoms mutually with adjacent terminal unit, and adopt distributed intelligence control mode, the process information of each terminal unit reduces greatly, alleviates the load of processor, the time under reach.The present invention introduces the protection cooperation scheme of a new applicable hand-in-hand duplicate supply looped network or many power rings web frame, is called the closed loop mode that peer to peer network is protected.The program utilizes peer-to-peer communication network, each intelligent controller is collected and the information of other switches in the malfunction of comprehensive utilization itself and network, carries out analysis and judge, realize switch at a high speed, selectively action.Both overcome the dependence to protection substation, when guaranteeing again the breaking down Anywhere of circuit, switch can correct operation.Its objective is, faster and higher reliability.It will be a brand-new protection conception; the protection cooperation of distribution automation system is passed by concentrated by being distributed to; by concentrating again to the course of distribution, utilizing modern communication mode and simple criterion, making whole network more efficiently complete cooperation in interaction.Communication module in terminal unit in the present invention can be independent setting, also can be integrated in intelligent controller.
Described electric power networks system is electric power networks system or the many power supplys parallel powering power network system of handing in hand.Described electric power networks system can be various electric pressure.
In the present invention, what each described terminal unit had in following function is whole or several: fast tripping protection function, overcurrent protection function, reclosing function, electric coincidence function, successful reclosing latch-up protection function in short-term, be incorporated into quick tripping function, interlocking dead electricity time delay separating brake blocking function, dead electricity time delay separating brake not blocking function, residual voltage pulse separating brake blocking function, one-sided decompression time-delay closing function, inspection locking one-sided decompression time-delay closing function after fault.
The concrete meaning of above-mentioned functions is:
1.1, fast tripping protection function
1) communication network type fast tripping protection function under normal circumstances:
Network service is normal, without " latch-up protection " mark-> self overcurrent and be greater than quick-break definite value, cross flow path direction to the right and right-side switch without combined fault outflow of bus current (or self overcurrent, cross flow path direction left and left-side switch without combined fault outflow of bus current)-> switch automatic brake separating;
2) emergency function of communication network type fast tripping protection under normal circumstances:
Network service is normal, without " latch-up protection " mark-> self overcurrent and be greater than quick-break definite value, cross flow path direction to the right and right-side switch have combined fault outflow of bus current (or self overcurrent, cross flow path direction left and left-side switch has combined fault outflow of bus current)-> fault current sustainable existence--> standby time delay is to rear switch automatic brake separating;
3) in communication abnormality situation, the fast tripping protection under fault-tolerant state:
Network service is abnormal; without " latch-up protection " mark-> self overcurrent and be greater than quick-break definite value; cross flow path direction to the right and right-side switch over-current state information not all or none method confirm (or self overcurrent, cross flow path direction left and left-side switch over-current state information not all or none method confirm)-> switch automatic brake separating--the fault-tolerant tripping operation flag set of >
1.2, overcurrent protection function
1) communication network type overcurrent protection function under normal circumstances:
Network service normal (fault), being greater than without " latch-up protection " mark-> self overcurrent and electric current protects definite value to be less than quick-break definite value in limited time, cross flow path direction to the right and right-side switch without combined fault outflow of bus current (or self overcurrent, cross flow path direction left and left-side switch without combined fault outflow of bus current)-> delay time is to-> switch automatic brake separating;
2) emergency function of communication network type overcurrent protection under normal circumstances:
Network service is normal, without " latch-up protection " mark-> self overcurrent and electric current is greater than overcurrent protection definite value is less than quick-break definite value, cross flow path direction to the right and right-side switch have combined fault outflow of bus current (or self overcurrent, cross flow path direction left and left-side switch has combined fault outflow of bus current)-> fault current sustainable existence--the > overcurrent delay time adds that standby delay time is to rear switch automatic brake separating;
3) in communication abnormality situation, the overcurrent protection under fault-tolerant state:
Network service is abnormal; without " latch-up protection " mark-> self overcurrent and electric current be greater than overcurrent protection definite value be less than quick-break definite value cross flow path direction to the right and right-side switch over-current state information not all or none method confirm (or self overcurrent, cross flow path direction left and the not all or none method confirmation of left-side switch over-current state information)-> switch automatic brake separating--the fault-tolerant tripping operation flag set of >.
1.3, reclosing function
1) the reclosing function under normal condition
Communication under normal circumstances, after switch quick-break/overcurrent protection tripping operation, switch does not indicate without " lock-reclosing lock " at co-bit->, be more than or equal to 1 without " residual voltage pulse "-> " coincidence number of times ", " fault trip " flag set-> delay time is to-> switch automatic closing;
2) the reclosing function after backup protection action
Communication under normal circumstances; after switch quick-break/overcurrent backup protection tripping operation; switch does not indicate without " lock-reclosing lock " at co-bit->; be more than or equal to 1 without " residual voltage pulse "-> " coincidence number of times ", " fault trip " flag set-> delay time is to-> switch automatic closing.
1.4, electric coincidence function is obtained
Reclosing function under fault-tolerant state:
There is pressure switch side--and > switch is not in co-bit-> " fault-tolerant fault trip " flag set, without " locking obtains electric coincidence " mark, without " residual voltage pulse "-> delay time to-> switch automatic closing.
1.5, successful reclosing latch-up protection function in short-term
" reclosing " or " electric coincidence " successful reclosing-> " latch-up protection mark " set, the electric current that breaks down (fault current duration is greater than protection time delay, is less than protection time delay+latch-up protection time delay in short-term)--> protection is failure to actuate-and > delay time is to-> " latch-up protection mark " removing.
1.6, quick tripping function after fault is incorporated into
After switch co-bit-> " reclosing " or " electric coincidence " overlap, detect that overcurrent-> sets delay time to-> switch automatic brake separating.
1.7, interlocking dead electricity time delay separating brake blocking function
Normal (exception)-> self the decompression defluidization of network service; receive adjacent switch " protection fault trip " (or " on-load switch fault trip ") mark-> delay time to-> switch automatic brake separating and locking, put " separating brake locking " flag bit.
1.8, dead electricity time delay separating brake not blocking function
Be generally used for the switch of next-door neighbour's power supply:
Self decompression defluidization-> delay time is to-> switch automatic brake separating not locking.
1.9, residual voltage pulse separating brake blocking function
Switch divides position, detects that residual voltage pulse-> " separating brake not locking " mark is converted to " separating brake locking " mark.
1.10, one-sided decompression time-delay closing function
Even if this functional requirement can not confirm adjacent switch fault-free, decompression also can turn confession after time delay:
There is pressure switch point position-> switch side, and without " locking turns confession " mark, the abnormal or normal adjacent switch fault-free trip mark-> delay time that communicates of communicating is to-> switch automatic closing.
1.11, locking one-sided decompression time-delay closing function is examined
This functional requirement only has confirmation adjacent switch fault-free mark just likely to turn confession:
Switch point position-> network service is normal-and there is pressure > switch side, without " locking turns confession " mark, adjacent switch fault-free trip mark-> delay time is to-> switch automatic closing.
Below in conjunction with electric power networks reduced graph, illustrate when breaking down, guard method embodiment of the present invention:
Fig. 1 is the electric power networks reduced graph that closed loop mode runs.S1, S2, S3, S4 in Fig. 1 are circuit breaker entirely; Circuit breaker S1, S2, S3, S4 system is "on" position when normally running, thus forms closed loop mode.One station terminal unit (including two groups of PT) comprises the circuit breaker of an intelligent controller and control thereof, by the mutual information to each other of switch between the intelligent controller of described terminal unit.Give Liang Ge transformer station in Fig. 1, transformer station wire-outgoing breaker CB1, CB2 adjust No. 1 reclosing function.
Embodiment 1, when communicating normal, break down between the circuit breaker of the described terminal unit of next-door neighbour transformer station and transformer station, namely fault point is F1 point, and protection act process is as follows:
After wire-outgoing breaker CB1 in A, transformer station ES1 detects fault current, start fast tripping protection function or overcurrent protection function;
Intelligent controller in the described terminal unit of B, next-door neighbour transformer station ES1 starts fast tripping protection function or overcurrent protection function, and circuit breaker S1 trips.Thus isolated fault point.
Embodiment 2, when communicating normal, breaks down between the circuit breaker of described terminal unit, the fault point F2 namely in Fig. 1, and protection act process is as follows:
A, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of side, fault point or overcurrent protection function, circuit breaker S1 trips;
B, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of other side, fault point or overcurrent protection function, circuit breaker S2 trips.Thus isolated fault point.
Embodiment 3, when communicating normal, breaks down between the circuit breaker of described terminal unit, the fault point F3 namely in Fig. 1, and protection act process is as follows:
A, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of side, fault point or overcurrent protection function, circuit breaker S2 trips;
B, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of other side, fault point or overcurrent protection function, circuit breaker S3 trips.Thus isolated fault point.
Embodiment 4, when communicating normal, breaks down between the circuit breaker of described terminal unit, the fault point F4 namely in Fig. 1, and protection act process is as follows:
A, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of side, fault point or overcurrent protection function, circuit breaker S3 trips;
B, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of other side, fault point or overcurrent protection function, circuit breaker S4 trips.Thus isolated fault point.
Embodiment 5; break down between the circuit breaker of described terminal unit; there is communication abnormality in the described terminal unit from the nearest control circuit breaker of terminal unit described in fault point; as fault point F4 in FIG; intelligent controller generation communication abnormality in the described terminal unit at circuit breaker S2 place, protection act process is as follows:
A, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of both sides, fault point or overcurrent protection function, circuit breaker S3, S4 trip;
Described in B, the intelligent controller being arranged in the described terminal unit of communication abnormality and the Upstream section adjacent with communication abnormality terminal unit, the intelligent controller of terminal unit starts fast tripping protection function or overcurrent protection function, and circuit breaker S2 and circuit breaker S1 trips;
C, only by communication abnormality cause the intelligent controller in the described terminal unit of tripping operation to start electric coincidence function and successful reclosing latch-up protection function in short-term, circuit breaker S1 and S2 closes a floodgate.
Embodiment 6, break down between the circuit breaker of described terminal unit, described in fault point there is communication abnormality in terminal unit, and as the generation communication abnormality of the described terminal unit at fault point F4, circuit breaker S3 place in FIG, protection act process is as follows:
A, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of both sides, fault point or overcurrent protection function, circuit breaker S3, S4 trip;
B, the intelligent controller of intelligent controller and the described terminal unit adjacent with communication abnormality terminal unit being arranged in the described terminal unit of communication abnormality start fast tripping protection function or overcurrent protection function, and circuit breaker S2 trips (circuit breaker S3, S4 trip);
C, only by communication abnormality cause the intelligent controller in the described terminal unit of tripping operation to start electric coincidence function and successful reclosing latch-up protection function in short-term, circuit breaker S2 closes a floodgate;
D, to be caused to trip and the intelligent controller being arranged in the described terminal unit of both sides, fault point starts to obtain electric coincidence function and quick tripping function after being incorporated into fault by communication abnormality, circuit breaker S3 and S4 first closes a floodgate and trips afterwards.
Can be found out by above-mentioned two embodiments, set the tripping operation caused by communication abnormality in the present invention, can carry out again electric reclosing, thus eliminate the misoperation that brings of communication abnormality.And the circuit breaker being positioned at fault point can start and is incorporated into fast trip after fault, to correct the tripping operation that transient fault causes.The present invention by above-mentioned setting, even if when communication abnormality, also can action accurately, complete the isolation work of fault point.
Embodiment 7, when communicating normal, breaks down between the circuit breaker of described terminal unit, and the breaker mechanical exception in described terminal unit, tripping, as fault point F2 in FIG, circuit breaker S2 tripping, protection act process is as follows:
A, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of both sides, fault point or overcurrent protection function, circuit breaker S1 and S2 trips;
B, due to machinery abnormal, the circuit breaker S2 tripping of the described terminal unit in steps A, with mechanical abnormal terminals unit adjoining, after the described terminal unit that is in backup status receives tripping signal, circuit breaker S3 trips.
Embodiment 8, when communicating normal, breaks down between the circuit breaker of described terminal unit, and the breaker mechanical exception in described terminal unit, tripping, as fault point F3 in FIG, circuit breaker S3 tripping, protection act process is as follows:
A, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of both sides, fault point or overcurrent protection function, circuit breaker S2 and S3 trips;
B, due to machinery abnormal, the circuit breaker S3 tripping of the described terminal unit in steps A, with mechanical abnormal terminals unit adjoining, after the described terminal unit that is in backup status receives tripping signal, circuit breaker S4 trips.
Embodiment 9, when communicating normal, breaks down between the circuit breaker of described terminal unit, and the breaker mechanical exception in described terminal unit, tripping, as fault point F4 in FIG, circuit breaker S2 and S3 tripping, protection act process is as follows:
A, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of both sides, fault point or overcurrent protection function, circuit breaker S3 and S4 trips;
B, due to machinery abnormal, the circuit breaker S3 tripping of the described terminal unit in steps A, with mechanical abnormal terminals unit adjoining, after the described terminal unit that is in backup status receives tripping signal, intelligent controller in the terminal unit at circuit breaker S2 place sends out separating brake order, because machinery is abnormal, circuit breaker S2 tripping, after intelligent controller in described terminal unit that be now close to circuit breaker S2, that be in backup status receives the tripping signal of circuit breaker S2, intelligent controller in the terminal unit at circuit breaker S1 place sends out separating brake order, and circuit breaker S1 trips.When machinery is abnormal, tripping operation principle, after the abnormal contiguous terminal unit of machinery receives tripping signal, substitutes the terminal unit that machinery is abnormal.
Embodiment 10, when communicating normal, breaks down between the circuit breaker of the described terminal unit of next-door neighbour transformer station and transformer station; and the breaker mechanical exception in described terminal unit, tripping, as fault point F1 in FIG; circuit breaker S1 tripping, protection act process is as follows:
After wire-outgoing breaker CB1 in A, transformer station ES1 detects fault current, start fast tripping protection function;
Intelligent controller in the described terminal unit of B, next-door neighbour transformer station ES1 starts fast tripping protection function or overcurrent protection function, sends separating brake order, because machinery is abnormal, and circuit breaker S1 tripping;
C, with the abnormal described terminal unit of machinery adjoining, after the described terminal unit that is in backup status receives tripping signal, circuit breaker S2 trips.
In the above-mentioned enforcement that the present invention provides, each step can repeatedly according to the integration number of times of setting, and some step wherein is synchronously carried out, and also has the sequencing of some steps to exchange.Sequence of movement according to power supply power supply or electric and determine.What in above-described embodiment that the present invention provides, start correlation function is all intelligent controllers in terminal unit, and separating brake, tripping operation or combined floodgate are all circuit breakers.
Clearly can learn that the present invention is not only applicable to the protection under normal condition by above-described embodiment, and can also realize for protection when communication failure and machinery exception.Fault flexibly in the electric power networks of location isolation fast under all kinds of situation.
Claims (8)
1. based on the network type guard method that electric power networks closed loop mode runs, for the electric power networks system that closed loop mode runs, described electric power networks system comprises the terminal unit that multiple transformer station is connected with described transformer station, it is characterized in that: each described terminal unit comprises intelligent controller, circuit breaker and communication module, communication module in each described terminal unit only communicates with the described terminal unit of next-door neighbour, intelligent controller in each described terminal unit collects the fault current of the circuit breaker in this terminal unit and adjacent end unit, fault current direction, fault current relating heading, information after state and fault, described terminal unit fault current detected and the side pointed in fault current direction does not have fault current to flow out, intelligent controller in terminal unit described in this starts fast tripping protection function or overcurrent protection function, tripping operation, otherwise the intelligent controller in described terminal unit is only protected in support.
2. as claimed in claim 1 based on the network type guard method that electric power networks closed loop mode runs, it is characterized in that: it is whole or several that each described terminal unit has in following function: fast tripping protection function, overcurrent protection function, reclosing function, electric coincidence function, successful reclosing latch-up protection function in short-term, be incorporated into quick tripping function, interlocking dead electricity time delay separating brake blocking function, dead electricity time delay separating brake not blocking function, residual voltage pulse separating brake blocking function, one-sided decompression time-delay closing function, inspection locking one-sided decompression time-delay closing function after fault.
3. as claimed in claim 2 based on the network type guard method that electric power networks closed loop mode runs, it is characterized in that: when communicating normal, break down between the circuit breaker of the described terminal unit of next-door neighbour transformer station and transformer station, protection act is as follows:
After wire-outgoing breaker in A, transformer station detects fault current, start fast tripping protection function or overcurrent protection function;
Intelligent controller in the described terminal unit of B, next-door neighbour transformer station starts fast tripping protection function or overcurrent protection function, circuit breaker trip.
4. as claimed in claim 2 based on the network type guard method that electric power networks closed loop mode runs, it is characterized in that: when communicating normal, break down between the circuit breaker of described terminal unit, protection act is as follows:
A, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of side, fault point or overcurrent protection function, circuit breaker trip;
B, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of other side, fault point or overcurrent protection function, circuit breaker trip.
5. as claimed in claim 2 based on the network type guard method that electric power networks closed loop mode runs; it is characterized in that: break down between the circuit breaker of described terminal unit; there is communication abnormality in the described terminal unit from the nearest control circuit breaker of terminal unit described in fault point, protection act is as follows:
A, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of both sides, fault point or overcurrent protection function, circuit breaker trip;
Described in B, the intelligent controller being arranged in the described terminal unit of communication abnormality and the Upstream section adjacent with communication abnormality terminal unit, the intelligent controller of terminal unit starts fast tripping protection function or overcurrent protection function, controls respective circuit breaker trip;
C, only by communication abnormality cause the intelligent controller in the described terminal unit of tripping operation to start electric coincidence function and successful reclosing latch-up protection function in short-term, breaker closing.
6. as claimed in claim 2 based on the network type guard method that electric power networks closed loop mode runs; it is characterized in that: when communicating normal, break down between the circuit breaker of described terminal unit, and the breaker mechanical exception in described terminal unit; tripping, protection act is as follows:
A, the intelligent controller startup fast tripping protection function being arranged in the described terminal unit of both sides, fault point or overcurrent protection function, circuit breaker trip;
B, due to machinery abnormal, the circuit breaker tripping of the described terminal unit in steps A, with mechanical abnormal terminals unit adjoining, after the intelligent controller of the described terminal unit that is in backup status receives tripping signal, circuit breaker trip.
7. as claimed in claim 2 based on the network type guard method that electric power networks closed loop mode runs; it is characterized in that: when communicating normal; break down between the circuit breaker of the described terminal unit of next-door neighbour transformer station and transformer station; and the breaker mechanical exception in described terminal unit; tripping, protection act is as follows:
After wire-outgoing breaker in A, transformer station detects fault current, start fast tripping protection function or overcurrent protection function;
Intelligent controller in the described terminal unit of B, next-door neighbour transformer station starts fast tripping protection function or overcurrent protection function, sends separating brake order, because machinery is abnormal, and circuit breaker tripping;
C, with the abnormal described terminal unit of machinery adjoining, after the intelligent controller of the described terminal unit that is in backup status receives tripping signal, circuit breaker trip.
8., as claimed in claim 1 based on the network type guard method that electric power networks closed loop mode runs, it is characterized in that: the communication module in described terminal unit is communicated with the communication module in adjacent terminal unit by switch.
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| CN104701823A (en) * | 2014-09-01 | 2015-06-10 | 凯里供电局 | Networking intelligent switch protection system for feeders of power distribution networks |
| CN105024361A (en) * | 2015-04-16 | 2015-11-04 | 扬州科宇电力有限公司 | On-site feeder automatic protection method and application thereof |
| CN105207182B (en) * | 2015-09-22 | 2018-09-28 | 深圳供电局有限公司 | A kind of method and system of power distribution network locality protection |
| CN105633922B (en) * | 2016-01-18 | 2018-08-21 | 四川东大恒泰电气有限责任公司 | A kind of logical formula protective device of electric loop sys node failure |
| CN106253269A (en) * | 2016-08-11 | 2016-12-21 | 国家电网公司 | It is applied to the standby method and device of intelligent distribution type feeder automation service restoration |
| CN107800121B (en) * | 2016-09-07 | 2019-03-26 | 南京南瑞继保电气有限公司 | A kind of Distributed power line protection method |
| CN106849034A (en) * | 2017-03-14 | 2017-06-13 | 国网江苏省电力公司苏州供电公司 | Overcurrent protection method and device based on power distribution network operation with closed ring mode |
| CN109586257B (en) * | 2018-12-06 | 2020-03-31 | 北京四方继保自动化股份有限公司 | Selective self-adaptive cross-station ring network system fault processing method |
| CN109946567B (en) * | 2019-04-01 | 2020-12-18 | 石家庄科林电气股份有限公司 | Distributed intelligent FA fault positioning method based on direction identification |
| CN110148930B (en) * | 2019-06-21 | 2021-02-26 | 石家庄科林电气股份有限公司 | Method for fault location and automatic topology identification in power distribution network |
| CN110994786B (en) * | 2019-11-12 | 2021-08-31 | 广东电网有限责任公司 | Single intelligent distributed power distribution terminal control method based on peer-to-peer communication |
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| JP5466092B2 (en) * | 2010-06-16 | 2014-04-09 | 株式会社日立製作所 | Multi-terminal power line protection relay system |
| CN202759221U (en) * | 2012-05-25 | 2013-02-27 | 南京国网电瑞继保科技有限公司 | Network relay protection device capable of realizing rapid fault isolation and reconstruction |
| CN102882195A (en) * | 2012-10-24 | 2013-01-16 | 江苏省电力公司扬州供电公司 | Intelligent longitudinally-interconnected feeder automation system |
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Address after: 100085, Beijing, Haidian District on the road No. 8, building 3, 4 floor Patentee after: BEIJING CREATIVE DISTRIBUTION AUTOMATION Co.,Ltd. Patentee after: FOSHAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID Co.,Ltd. Address before: 100085, Beijing, Haidian District on the road No. 8, building 3, 4 floor Patentee before: BEIJING CREATIVE DISTRIBUTION AUTOMATION Co.,Ltd. Patentee before: FOSHAN POWER SUPPLY BUREAU, GUANGDONG POWER GRID Corp. |
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Effective date of registration: 20151029 Address after: 100085, Beijing, Haidian District on the road No. 8, building 3, 4 floor Patentee after: BEIJING CREATIVE DISTRIBUTION AUTOMATION Co.,Ltd. Patentee after: FOSHAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID Co.,Ltd. Patentee after: ELECTRIC POWER Research Institute CHINA SOUTHERN POWER GRID Address before: 100085, Beijing, Haidian District on the road No. 8, building 3, 4 floor Patentee before: BEIJING CREATIVE DISTRIBUTION AUTOMATION Co.,Ltd. Patentee before: FOSHAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID Co.,Ltd. |