CN102738777A - Rapid distribution network fault self-recovery method based on generic object oriented substation event (GOOSE) message - Google Patents
Rapid distribution network fault self-recovery method based on generic object oriented substation event (GOOSE) message Download PDFInfo
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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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
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- Y04S10/16—Electric power substations
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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
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Abstract
The invention discloses a rapid distribution network fault self-recovery method based on a generic object oriented substation event (GOOSE) message. The method comprises the following steps of: (10) monitoring whether a distribution line between intelligent distribution terminals fails or not in real time; (11) rapidly determining a failed line section by utilizing the GOOSE message when a fault signal is detected; and (12) opening a nearby circuit breaker and an isolating switch which are directly connected with the line, turning on a load side interconnection switch of the line, and finally closing a power side reclosure. By the method, the fault in a distribution network system can be automatically and rapidly isolated before single shot reclosing of transformer wire outlet on the premise of guaranteeing high reliability and high transmission efficiency; and moreover, the time is maintained on a millisecond scale in the whole process, and the power failure time of a user is greatly shortened.
Description
Technical field
The invention belongs to distribution network automated field, especially relate to a kind of distribution network failure rapidly self-healing method based on the GOOSE message.
Background technology
Intelligent grid is the up-to-date trend that power system development is changed, and low and medium voltage distribution network is the important component part of intelligent grid.The direct user oriented of power distribution network is the key link that guarantees power supply quality, improves operation of power networks efficient, so the intellectuality of power distribution network is the most important thing that intelligent grid is built, and wherein the construction of distribution line failure self-healing function is an important ring.
Distribution network failure self-healing is meant when distribution line or equipment break down, and does not need or the only a small amount of manual operation of needs, reaches the isolation of fault point and other non-fault line and equipment are restored electricity, and prevents a kind of technology of user's loss of outage.The content of fault self-recovery comprises automatic trouble diagnosis, fault location, Fault Isolation and restores electricity.The target of fault self-recovery is to reduce the manpower and materials of customer outage hours, raising user power supply reliability, the power supply enterprise's operating efficiency that improves, reduction troubleshooting.
Power distribution network directly links to each other with the user, is that the safe and reliable operation of distribution line is directly connected to user's power supply reliability with the final approach of power delivery to the user.Yet the fault of distribution line is inevitable, and to the troubleshooting of distribution line, numerous scholars and work about electric power person have launched a large amount of and deep research.Wherein, to fault location, isolation, recovery, distribution network automated technology has been proposed.Critical function as electrical power distribution automatization system; Feeder automation to distribution network failure accurately locate, rapidly isolated fault and recover the power supply of non-fault zone; Mainly realized by dual mode: one is based on the field data of distribution terminal monitoring, adopts artificial line walking, artificial location, artificial method of isolating to handle; The 2nd, operation in tandem is controlled according to the distribution terminal internal logic circuit breaker and isolating switch, the realization fault is isolated automatically, is supplied power and recovers automatically.Above-described existing power distribution network line fault treatment technology; What have needs manual intervention, manual handle fault, manually restores electricity; The technology that has causes problems such as network congestion, data delay, broadcast storm easily on message transmission mechanism; Make whole fault location, the time of the process of isolating, restore electricity is longer, during the user have to stand the power failure of tens minutes even several hours, increased customer outage hours, reduced power supply reliability.It is thus clear that prior art can not satisfy the requirement of intelligent power distribution net fault rapidly self-healing.
Summary of the invention
The technical problem that the present invention will solve provides a kind of distribution network failure rapidly self-healing method based on the GOOSE message; Under the prerequisite that guarantees highly reliable rate and high-transmission efficient; Can the fault in the distribution network system be isolated before transformer outlet single shot reclosing automatically fast; And whole process time maintains Millisecond, reduces customer outage hours greatly.
For solving the problems of the technologies described above, the present invention adopts following technical scheme: the distribution network failure rapidly self-healing method based on the GOOSE message may further comprise the steps:
< 10>whether the distribution line between the monitoring intelligent distribution terminal breaks down in real time;
< 11>when detecting fault-signal, utilize the GOOSE message to confirm the part of path that breaks down fast;
< 12>open nearest circuit breaker and the isolating switch that directly links to each other with circuit, the load side interconnection switch of closed circuit then, last closed mains side reclosing.
Voltage, the current value of real-time monitoring system median generatrix in the step < 10 >, the record trouble duration, with voltage, current value and trouble duration and power distribution station terminal in advance setting value compare, whether to break down in definite distribution system; Setting value comprises voltage decompression, overvoltage, the setting value of electric current defluidization, overcurrent and trouble duration, when detect voltage, electric current, when trouble duration exceeds the setting value scope, judgement is broken down; The representation for fault permanent fault, promptly trouble duration exceeds the fault of setting value.
Step may further comprise the steps in < 11 >:
< 110>after confirming to break down, the intelligent power distribution terminal that detects fault protects action message also through the virtual substation of GOSSE message reporting mains side through GOOSE message reporting fault to virtual substation simultaneously;
< 111>virtual substation starts fault location function after receiving above-mentioned information immediately, inquires about to the terminal of sending both sides, fault-signal terminal through the GOSSE message respectively, according to the GOOSE message information of feedback, localization of faults position;
< 112>virtual substation issues the GOSSE broadcasting packet and makes the nearest intelligent power distribution terminal tripping operation that directly links to each other with the fault point circuit, and the fault point isolates successfully.
Virtual substation issues the GOOSE message in the step < 112 >, and is different according to the physical layer destination address, transmits through the distribution terminal of multicast to the multicast domain appointment, only has to receive with the nearest intelligent power distribution terminal that the fault point circuit directly links to each other and carry out to trip and move.
Virtual substation only is a code name, and it can be any intelligent power distribution terminal in the zone.
The intelligent power distribution terminal of sending fault-signal is one or more.
The GOOSE message is acyclic event transmission message, and is based on IEC 61850 standards, on data link layer, adopts a kind of message transmission of ISO/IEC 8802.3 agreements (being Ethernet protocol).
The GOOSE message has added a Tag at the Ethernet heading of standard, has comprised the VLAN ID sign indicating number (IEEE 802.1q) of 12bit and the message priority sign indicating number (IEEE 802.1p) of 3bit among the Tag.
The GOOSE message priority is the highest IV level, and in transmission course, directly information is mapped to data link layer from application layer, middle hop super-interval layer.
The message frame size of GOOSE message is 64B～1518B, and transmission delay is between 110.8 microseconds～1724 microseconds.
Step may further comprise the steps in < 12 >:
< 121>virtual subnet stands in the non-mains side search in fault point, up to searching for to the distribution terminal at interconnection switch place;
< 122>virtual substation issues multicast signal through the GOOSE message, orders above-mentioned distribution terminal to carry out the interconnection switch close commands, and the power distribution network circuit restores electricity between nearest distribution terminal to the interconnection switch of the non-mains side in fault point;
< 123>the mains side switch is through n automatic reclosing after second, and this moment, fault was isolated, and distribution line restores electricity the power supply of non-fault line full recovery so far between nearest distribution terminal to the power outlet of fault point mains side.
Longer to present distribution network failure locate, isolate, restore electricity time of process; The problem of power supply reliability difference; The inventor has designed the distribution network failure rapidly self-healing method that the present invention is based on the GOOSE message; Under the prerequisite that guarantees highly reliable rate and high-transmission efficient, through real-time monitoring distribution line, utilize the GOOSE message quick and precisely to locate and isolated fault circuit and fast quick-recovery user power supply automatically, can be with the isolation fast automatically before transformer outlet single shot reclosing of the fault in the distribution network system; And whole process time maintains Millisecond, reduces customer outage hours greatly.
Description of drawings
Fig. 1 is the flow chart that the present invention is based on the distribution network failure rapidly self-healing method of GOOSE message.
Fig. 2 is a kind of power distribution network line construction sketch map of execution mode that the present invention is based on the distribution network failure rapidly self-healing method of GOOSE message.
Fig. 3 the present invention is based on fast detecting flow chart in a kind of execution mode of distribution network failure rapidly self-healing method of GOOSE message.
Fig. 4 the present invention is based in a kind of execution mode of distribution network failure rapidly self-healing method of GOOSE message positioning flow figure fast.
Fig. 5 the present invention is based in a kind of execution mode of distribution network failure rapidly self-healing method of GOOSE message to isolate flow chart fast.
Fig. 6 the present invention is based on the flow chart that restores electricity fast in a kind of execution mode of distribution network failure rapidly self-healing method of GOOSE message.
Fig. 7 is a kind of flow chart of execution mode that the present invention is based on the distribution network failure rapidly self-healing method of GOOSE message.
Among the figure: 1 10kV of transformer station bus, 2 10kV of transformer station go out wiretap, 3 switching station A (DTU_A), 4 on-pole switch B (FTU_B), 5 on-pole switch C (FTU_C), 6 on-pole switch D (FTU_D), 7 on-pole switch E (FTU_E); 10 to 12,20 to 22,30 to 34,40 to 43,50 to 53,60 to 69 represent that respectively corresponding step 10 is to 12,20 to 22,30 to 34,40 to 43,50 to 53,60 to 69.
Embodiment
As shown in Figure 1, the present invention is based on the distribution network failure rapidly self-healing method of GOOSE message, may further comprise the steps:
< 10>whether the distribution line between the monitoring intelligent distribution terminal breaks down in real time;
Voltage, the current value of real-time monitoring system median generatrix in the step < 10 >, the record trouble duration, with voltage, current value and trouble duration and power distribution station terminal in advance setting value compare, whether to break down in definite distribution system; Setting value comprises voltage decompression, overvoltage, the setting value of electric current defluidization, overcurrent and trouble duration, when detect voltage, electric current, when trouble duration exceeds the setting value scope, judgement is broken down; The representation for fault permanent fault, promptly trouble duration exceeds the fault of setting value.
< 11>when detecting fault-signal, utilize the GOOSE message to confirm the part of path that breaks down fast;
Step may further comprise the steps in < 11 >:
< 110>after confirming to break down, the intelligent power distribution terminal that detects fault protects action message also through the virtual substation of GOSSE message reporting mains side through GOOSE message reporting fault to virtual substation simultaneously;
< 111>virtual substation starts fault location function after receiving above-mentioned information immediately, inquires about to the terminal of sending both sides, fault-signal terminal through the GOSSE message respectively, according to the GOOSE message information of feedback, localization of faults position;
< 112>virtual substation issues the GOSSE broadcasting packet and makes the nearest intelligent power distribution terminal tripping operation that directly links to each other with the fault point circuit, and the fault point isolates successfully.
Virtual substation issues the GOOSE message in the step < 112 >, and is different according to the physical layer destination address, transmits through the distribution terminal of multicast to the multicast domain appointment, only has to receive with the nearest intelligent power distribution terminal that the fault point circuit directly links to each other and carry out to trip and move.
Wherein, virtual substation only is a code name, and it can be any intelligent power distribution terminal in the zone; The intelligent power distribution terminal of sending fault-signal is one or more.
The GOOSE message is acyclic event transmission message, and is based on IEC 61850 standards, on data link layer, adopts a kind of message transmission of ISO/IEC 8802.3 agreements (being Ethernet protocol); The GOOSE message has added a Tag at the Ethernet heading of standard, has comprised the VLAN ID sign indicating number (IEEE 802.1q) of 12bit and the message priority sign indicating number (IEEE 802.1p) of 3bit among the Tag; The GOOSE message priority is the highest IV level, and in transmission course, directly information is mapped to data link layer from application layer, middle hop super-interval layer; The message frame size of GOOSE message is 64B～1518B, and transmission delay is between 110.8 microseconds～1724 microseconds.
< 12>open nearest circuit breaker and the isolating switch that directly links to each other with circuit, the load side interconnection switch of closed circuit then, last closed mains side reclosing.
Step may further comprise the steps in < 12 >:
< 121>virtual subnet stands in the non-mains side search in fault point, up to searching for to the distribution terminal at interconnection switch place;
< 122>virtual substation issues multicast signal through the GOOSE message, orders above-mentioned distribution terminal to carry out the interconnection switch close commands, and the power distribution network circuit restores electricity between nearest distribution terminal to the interconnection switch of the non-mains side in fault point;
< 123>the mains side switch is through n automatic reclosing after second, and this moment, fault was isolated, and distribution line restores electricity the power supply of non-fault line full recovery so far between nearest distribution terminal to the power outlet of fault point mains side.
Use self-healing method of the present invention; Under the prerequisite that guarantees highly reliable rate and high-transmission efficient; Can the fault in the distribution network system automatically fast be isolated before transformer outlet single shot reclosing, and whole process time maintains Millisecond, reduce customer outage hours greatly.
Existing power distribution network generally adopts the fault self-recovery method; It specifically comprises: artificial find fault, artificial isolated fault, restore electricity that system finds fault, artificial line walking location, isolated fault automatically, restore electricity and system automatically finds, location, isolated fault restore electricity.Preceding two kinds of method speed are slow, interruption duration long, labor intensive, and the third then can realize full-automatic fault self-recovery, and the present invention detects in real time just as prerequisite whether fault has taken place in the distribution network system; After fault takes place, carry out the isolation of the location and the fault point of fault point successively, realize in the time that at Millisecond fault isolates automatically and restore electricity, satisfied the requirement of distribution network failure rapidly self-healing.The concrete principle that distribution network failure detection, localization of fault, isolation and the circuit that the present invention mentions restores electricity is following:
1. distribution network failure detects
In the distribution network system, when system normally moves, the three-phase voltage symmetry, electric current is normal, and is meritorious idle normal.When breaking down, during earth fault, metal earth fault can cause the ground connection phase voltage to be reduced to zero, and normal phase voltage raises and is line voltage, and very big electric current occurs; During short circuit, single-phase or multiphase current sharply increases, and correspondent voltage is reduced to zero; During disconnection fault, the fault phase current demonstrates decompression, defluidization state.
Therefore, these characteristics based on the electric current and voltage amount in the power distribution network add the monitoring to trouble duration; Effectively whether break down in the decision-making system; Be any type fault, for example, a plurality of distribution terminals can be installed on a distribution wire; When system normally moved, the detected voltage of all distribution terminals, electric current were all normal; When and the ground connection phase voltage drop to zero, normal phase voltage raises and is line voltage, and trouble duration is judged earth fault is taken place during greater than setting value; Distribution terminal fault phase voltage drops to zero behind the fault point, and distribution terminal fault phase voltage is normal the fault point before, and trouble duration is during greater than setting value, when judging the generation disconnection fault.
2. the location of distribution network failure point
The localization method of distribution network failure point has many kinds, comprises artificial line walking location, power distribution automation main website location, the automatic location of distribution terminal etc.Fault location time is short more, and customer outage hours is just few more, and distribution terminal need not the main website intervention in the location automatically, adopts internal logic failure judgement point position, has reduced the interference and the influence of communication process, so the present invention adopts the distribution terminal automatic positioning method.
When breaking down in the power distribution network, different conditions will appear in the distribution terminal before and after the fault point.According to distribution terminal self-healing logical theory, all distribution terminals before the fault point all produce fault message.Traditional message transmission will be set up the TCP/IP link, and transfer of data need be passed through application layer, presentation layer, session layer, transport layer, network layer, data link layer, can waste the regular hour, and priority level is lower II level.The present invention has adopted above-mentioned GOOSE communication protocol stack; Its application layer has defined protocol Data Unit PDU (Protocol Data Unit) specially; Behind the presentation layer coding, without ICP/IP protocol, information directly is mapped to data link layer from application layer; The purpose of this mapping mode is to avoid communication stack to cause transmission delay, thereby guarantees the rapidity of message transmissions, processing.In addition; Above-mentioned GOOSE message has added a Tag at the Ethernet heading of standard; The VLAN ID sign indicating number (IEEE 802.1q) of 12bit and the message priority sign indicating number (IEEE 802.1p) of 3bit have been comprised among the Tag; Message priority is set is the highest IV level, guarantee that information priority obtains issue.Through above-mentioned GOOSE message up sending fault message to virtual substation, wherein said virtual substation only is a code name, and it can be any intelligent power distribution terminal in the zone.Virtual substation is respectively inquired about all the other SOT states of termination through the GOOSE multicast message to the both sides, terminal according to receiving terminal signaling, and the GOSSE message information that utilizes all the other terminals to return then can be confirmed the position of distribution network failure point.
3. the isolation of distribution network failure point
The isolation of distribution network failure point is the core of distribution network failure self-healing method.The isolation of line fault point comprises that faulty line mains side and load side two ends isolate from system.Traditional distribution system Fault Isolation is after the terminal to report fault message is received by main website, judges through internal logic, issues broadcasting packet, first deenergization side circuit breaker, opens the load side circuit breaker again; Or earlier closed faulty line load side interconnection switch, again open the load side service entrance switch, open two kinds of methods of faulty line mains side switch at last.No matter which kind of method; All be to utilize IEC 61850, IEC 61968/101 or 104 stipulations to broadcast; Message is through physical layer, data link layer, network layer, transport layer, wall, process layer, application layer transmission; Priority is low to be the II level, and broadcasting packet causes network congestion and broadcast storm easily.The characteristics of this kind partition method are that the transmission speed of message after fault takes place is slower; Transmission delay; Reliability and transmission success rate are low; The terminal receives to main website and isolates message and need 500 milliseconds～1000 milliseconds approximately from sending the fault message, adds the processing delay of message in main website and is about 10 seconds, can not satisfy the requirement that fault is isolated fast.And the present invention is based on the self-healing method of GOOSE message; Proposed message transmissions without the process layer, directly mapped to data link layer, do not comprised such as protocol massages heads such as TCP and UDP from application layer; Reliability and transmission success rate are very high; And the Ethernet heading in standard has added a Tag, and comprising 12bit VLAN ID sign indicating number and 3bit message priority sign indicating number, priority is the highest IV level; Guarantee the Fault Isolation time of Millisecond, can satisfy the requirement that fault is isolated fast.
4. distribution network failure restores electricity
After fault obtained isolating, virtual subnet stood in the non-mains side search in fault point, up to the distribution terminal that searches the interconnection switch place.Virtual substation issues multicast signal through the GOOSE message, orders above-mentioned distribution terminal to carry out the interconnection switch close commands, and the power distribution network circuit restores electricity between nearest distribution terminal to the interconnection switch of the non-mains side in fault point.The mains side switch is through n automatic reclosing after second, and this moment, fault was isolated, and distribution line restores electricity the power supply of non-fault line full recovery so far between nearest distribution terminal to the power outlet of fault point mains side.
Can know according to above-mentioned distribution network failure detection, the location of distribution network failure point, the isolation of distribution network failure point and the concrete principle that distribution network failure restores electricity; At first; Utilize distribution terminal to monitor voltage, electric current on the power distribution network circuit in real time; It is compared with setting value respectively, judge whether fault has taken place in the power distribution network; After in the judgement system fault having taken place; Distribution terminal utilizes the GOOSE message to report fault message to the substation fast through wired optical fiber; Virtual substation issues the GOOSE multicast message to all the other distribution terminals of distribution terminal two-sided search that report fault message after receiving fault message, judges according to internal logic and confirms the fault scene; Behind the fault location point; The switch cut-off point is confirmed according to internal logic in virtual substation, issues GOOSE multicast message to multicast domain and specifies distribution terminal, the nearest intelligent power distribution terminal that promptly directly links to each other with the fault point circuit; This distribution terminal is carried out trip signal, and the fault point isolates successfully; After the Fault Isolation; The non-mains side search in the fault point earlier of virtual substation; Up to the distribution terminal that searches the interconnection switch place, virtual afterwards substation issues multicast signal through the GOOSE message, orders above-mentioned distribution terminal to carry out the interconnection switch close commands; Last mains side switch process n automatic reclosing after second realizes that non-fault line restores electricity.
Fig. 2 has shown the distribution network system of using one embodiment of the present invention equipment distribution terminal; This distribution network system has the 10kV of a transformer station bus outlet 1; There are two 10kV of transformer station to go out wiretap 2; One of them 10kV of transformer station goes out wiretap and is connected to switching station A 3, and distribution terminal DTU A is installed in the switching station A 3, and on-pole switch B (FTU_B) 4, on-pole switch C (FTU_C) 5 are installed in the switching station outlet; And being connected to interconnection switch, the interconnection switch place is equipped with on-pole switch D (FTU_D) 6; The 10kV of another transformer station goes out wiretap 2 and is connected to interconnection switch, and on-pole switch E (FTU_E) 7 is installed on its circuit.Under the normal operating condition, two 10kV outlet fanout operations, interconnection switch is a normally open.
As shown in Figure 3, fast detecting may further comprise the steps in this execution mode:
< 20>voltage of real-time monitoring system median generatrix, current value.
< 21>with above-mentioned voltage, current value and terminal in advance setting value compare, record trouble duration simultaneously is to confirm in the said distribution system whether above-mentioned permanent fault taking place; Wherein setting value comprises voltage decompression, overvoltage, the setting value of electric current defluidization, overcurrent and trouble duration.
< 22>when above-mentioned detection voltage, electric current, when trouble duration exceeds the setting value scope, judgement is broken down.
After finding the power distribution network line failure, need the fault point is located fast, Fig. 4 has explained how to utilize the GOOSE message to realize fault fast positioning.
As shown in Figure 4, quick location may further comprise the steps in this execution mode:
< 30>distribution terminal is detecting line failure in the monitoring in real time, generates fault message, and obtains the protection information of power outlet protection side.
< 31>fault message is sent to the virtual substation of distribution at a high speed through the GOOSE message immediately in all terminals that detect fault, and wherein virtual substation can be any distribution terminal, and this substation function is the virtual protocol function; The GOOSE message is without ICP/IP protocol, and information directly is mapped to data link layer from application layer, and priority is the highest IV level.
< 32>virtual substation starts fault location function according to the information that reports, and to both sides, the terminal inquiry other-end state that sends fault message, only the multicast domain designated terminal is all received multicast message, and replys through the GOOSE multicast message.
< 33>two lateral terminals report oneself state through the GOOSE message to virtual substation.
< 34>virtual substation receives the GOOSE message of above-mentioned distribution terminal transmission, judges localization of faults location according to internal logic.
As shown in Figure 5, isolate may further comprise the steps in this execution mode fast:
< 40>after the fault point was judged in the logic substation, through the GOOSE multicast message, order was tripped with the nearest distribution terminal that the fault point directly links to each other.
< 41>the multicast domain appointment with the fault point GOOSE message that nearest distribution terminal receives that all virtual substation issues that directly links to each other.
< 42>above-mentioned appointment carry out virtual substation trip signal with the fault point nearest distribution terminal that directly links to each other, all the other distribution terminals are failure to actuate.
< 43>Fault Isolation success.
As shown in Figure 6, restoring electricity fast in this execution mode may further comprise the steps:
< 50>after the fault point successfully isolated, virtual subnet stood in the non-mains side in fault point and searches for, up to searching for to the distribution terminal at interconnection switch place.
< 51>close a floodgate through this interconnection switch place distribution terminal of GOOSE message commands, then this interconnection switch restores electricity until the circuit of the non-mains side distribution terminal in fault point.
< 52>n after second transformer station go out the wiretap single shot reclosing, then transformer station goes out wiretap and restores electricity until the circuit of fault point mains side distribution terminal.
< 53>the non-fault line service restoration finishes.
Described the detailed process of each step among the present invention above respectively,, may further comprise the steps below in conjunction with the distribution network failure rapidly self-healing method of this execution mode of Fig. 7 complete description based on the GOOSE message:
< 60>monitor electric current and voltage on the bus in real time.
< 61>judge whether fault has taken place in the distribution network system,,, get into step < 62>when being judged as when being if this when not being judged as not, gets back to step < 60 >.Concrete determination methods is: when detect voltage, electric current, when trouble duration exceeds the setting value scope, judgement is broken down.
< 62>when breaking down, the intelligent power distribution terminal reports to the substation through the GOOSE message at a high speed with fault message; The GOOSE message is without ICP/IP protocol, and information directly is mapped to data link layer from application layer, and priority is the highest IV level.
< 63>virtual substation receives distribution terminal reporting information and the transformer outlet side protection action message that detects fault, and virtual substation issues the GOOSE multicast message and inquires about both sides, above-mentioned terminal other-end state.
< 64>the above-mentioned both sides distribution terminal that searches reports the GOOSE message that line status is reported to virtual substation.
< 65>virtual substation is through above-mentioned reporting information localization of faults position, and localization of fault is successful.
< 66>virtual substation issues tripping operation information through the GOOSE multicast message and specifies distribution terminal to multicast domain, and order is tripped with the distribution terminal that the fault point directly links to each other nearest.
< 67>carry out the trip signal that virtual substation issues with the fault point nearest distribution terminal that directly links to each other, the fault point isolates successfully.
< 68>after the fault point isolates, virtual substation makes interconnection switch place distribution terminal close a floodgate through GOOSE message transmitting order to lower levels, and circuit restores electricity between the distribution terminal of the non-mains side in fault point to the interconnection switch.
< 69>transformer station's outlet switch n single shot reclosing after second, then transformer station goes out wiretap and restores electricity until the circuit of fault point mains side distribution terminal.
Whether the distribution line that technical scheme of the present invention is based on real-time detection intelligent power distribution terminal room breaks down; When detecting fault-signal, utilize the GOOSE message that information is mapped to data link layer from application layer and transmit, skip wall; And it is the highest IV level that priority is set; Above-mentioned information comprises the malfunction, querying command, trip signal of terminal and virtual substation transmission etc., opens the nearest circuit breaker and the isolating switch that directly link to each other with said circuit afterwards, then the load side interconnection switch of closed said circuit; Last mains side reclosing is closed; Realize that the fault in the distribution network system isolates automatically fast before transformer outlet reclosing closure, and whole process time maintains Millisecond, can not produce the influence of having a power failure on a large scale the user.
Claims (11)
1. distribution network failure rapidly self-healing method based on the GOOSE message is characterized in that may further comprise the steps:
< 10>whether the distribution line between the monitoring intelligent distribution terminal breaks down in real time;
< 11>when detecting fault-signal, utilize the GOOSE message to confirm the part of path that breaks down fast;
< 12>open nearest circuit breaker and the isolating switch that directly links to each other with said circuit, the load side interconnection switch of closed said circuit then, last closed mains side reclosing.
2. the distribution network failure rapidly self-healing method based on the GOOSE message according to claim 1; The voltage, the current value that it is characterized in that real-time monitoring system median generatrix in the step < 10 >; The record trouble duration; With voltage, current value and trouble duration and power distribution station terminal in advance setting value compare, to confirm whether break down in the distribution system; Said setting value comprises voltage decompression, overvoltage, the setting value of electric current defluidization, overcurrent and trouble duration, when detect voltage, electric current, when trouble duration exceeds the setting value scope, judgement is broken down; Said representation for fault permanent fault, promptly trouble duration exceeds the fault of setting value.
3. the distribution network failure rapidly self-healing method based on the GOOSE message according to claim 1 is characterized in that may further comprise the steps in the step < 11 >:
< 110>after confirming to break down, the intelligent power distribution terminal that detects fault protects action message also through the virtual substation of GOSSE message reporting mains side through GOOSE message reporting fault to virtual substation simultaneously;
< 111>virtual substation starts fault location function after receiving above-mentioned information immediately, inquires about to the terminal of sending both sides, fault-signal terminal through the GOSSE message respectively, according to the GOOSE message information of feedback, localization of faults position;
< 112>virtual substation issues the GOSSE broadcasting packet and makes the nearest intelligent power distribution terminal tripping operation that directly links to each other with the fault point circuit, and the fault point isolates successfully.
4. the distribution network failure rapidly self-healing method based on the GOOSE message according to claim 3; It is characterized in that: virtual substation issues the GOOSE message in the step < 112 >; Different according to the physical layer destination address; Transmit through the distribution terminal of multicast, only have and receive and carry out the tripping operation action with the nearest intelligent power distribution terminal that the fault point circuit directly links to each other the multicast domain appointment.
5. the distribution network failure rapidly self-healing method based on the GOOSE message according to claim 3 is characterized in that: said virtual substation only is a code name, and it can be any intelligent power distribution terminal in the zone.
6. the distribution network failure rapidly self-healing method based on the GOOSE message according to claim 3 is characterized in that: said intelligent power distribution terminal of sending fault-signal is one or more.
7. the distribution network failure rapidly self-healing method based on the GOOSE message according to claim 1; It is characterized in that: said GOOSE message is acyclic event transmission message; And be based on IEC 61850 standards, on data link layer, adopt a kind of message transmission of ISO/IEC 8802.3 agreements.
8. the distribution network failure rapidly self-healing method based on the GOOSE message according to claim 7; It is characterized in that: said GOOSE message has added a Tag at the Ethernet heading of standard, has comprised the VLAN ID sign indicating number IEEE 802.1q of 12bit and the message priority sign indicating number IEEE 802.1p of 3bit among the Tag.
9. the distribution network failure rapidly self-healing method based on the GOOSE message according to claim 8; It is characterized in that: said GOOSE message priority is the highest IV level; And in transmission course, directly information is mapped to data link layer from application layer, middle hop super-interval layer.
10. the distribution network failure rapidly self-healing method based on the GOOSE message according to claim 9 is characterized in that: the message frame size of said GOOSE message is 64B～1518B, and transmission delay is between 110.8 microseconds～1724 microseconds.
11. the distribution network failure rapidly self-healing method based on the GOOSE message according to claim 1 is characterized in that may further comprise the steps in the step < 12 >:
< 121>virtual subnet stands in the non-mains side search in fault point, up to searching for to the distribution terminal at interconnection switch place;
< 122>virtual substation issues multicast signal through the GOOSE message, orders above-mentioned distribution terminal to carry out the interconnection switch close commands, and the power distribution network circuit restores electricity between nearest distribution terminal to the interconnection switch of the non-mains side in fault point;
< 123>the mains side switch is through n automatic reclosing after second, and this moment, fault was isolated, and distribution line restores electricity the power supply of non-fault line full recovery so far between nearest distribution terminal to the power outlet of fault point mains side.
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