CN100376069C - Non-master station transinission and distribution network control method - Google Patents
Non-master station transinission and distribution network control method Download PDFInfo
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Abstract
The present invention relates to a control method for a transmission and distribution network without a master station. The control method for the power transmission and distribution network comprises the following steps: detecting faults, positioning faults, isolating faults, reporting brake separation, switching on the brake and recovering power supply, wherein in the fault detection step, corresponding feeding terminal units detect fault power and fault information is sent to all the feeding terminal units; in the fault positioning step, the feeding terminal units position fault points according to the fault information; in the fault isolating step, brakes of the feeding terminal units at the fault points are separated and command the feeding terminal units at the downstream to separate brakes; in the brake separation reporting step, the feeding terminal units at the fault points, and the feeding terminal unit at the downstream send state information; in the brake combining step, the brake of a breaker is switched on; in the power supply restoration step, a brake at an open loop point is switched on. The control method of the present invention does not adopt a master station computer, and thus, the control algorithm of the present invention can automatically isolate a fault to the minimum degree even if the communication individual feeding terminal unit has a fault. Consequently, the situation that the whole network can not recover can not happen.
Description
Technical field
The present invention relates to the power transmission and distribution technical field, specifically, relate to a kind of transmission and distribution networks control method of not having main website.
Background technology
(no matter being thermal power generation, hydroelectric power generation or nuclear energy power generation) arrives user side to electric power from the power station, must pass through electrical power trans mission/distribution system.
At present in electrical power trans mission/distribution system, the line feed terminals unit is as the terminal equipment of transmission line, is installed on the electric pole that transmission line is equipped with on-load switch.Each line feed terminals unit instantaneous acquiring flows through the semaphores such as electric current, voltage and on off state of on-load switch, by calculating the operating power of on-load switch, and the statistics of loading, again these data by delivering to the master station computer of transformer station on the communication network.The data that master station computer transmits according to each line feed terminals unit on the whole transmission and distribution networks, carry out analyzing and processing, and to line feed terminals unit remote control transmission order, according to circumstances send different instructions to the remote control of line feed terminals unit, make the line feed terminals unit carry out the on/off switch operation of on-load switch, make the network loss minimum of transmission and distribution networks system, whole electrical power trans mission/distribution system operate as normal, and run on best state.When electrical power trans mission/distribution system breaks down, master station computer is summarized the data that the line feed terminals unit is uploaded, judge the zone that fault takes place, and pass through remote control command, carry out the on/off switch operation of corresponding on-load switch by the line feed terminals unit, faulty section is isolated, and recover the power supply in fault-free zone, thereby make the power supply interrupted district minimum.
From as can be seen above-mentioned, in whole control process, master station computer plays a part indispensable.Whole fault location, Fault Isolation, service restoration process all are to finish under the control of master station computer.When the communication of master station computer and each line feed terminals unit was broken down, because master station computer can't be carried out above-mentioned control immediately, the reliability of power supply greatly reduced.At this moment if supply line's fault, will hinder for some reason that the zone can't be isolated, power supply can't recover and cause great power outage, so will cause heavy losses to national economy.
Summary of the invention
Edge this, the object of the present invention is to provide a kind of transmission and distribution networks control method of not having main website, with exist in the control method that overcomes the master station computer that tradition has because of going wrong with communicating by letter of master station computer, and the great power outage that causes.
According to above-mentioned purpose, of the present inventionly provide a kind of transmission and distribution networks control method, can be used for not having the transmission and distribution networks system of main website, the transmission and distribution networks system of described no main website comprises: a plurality of power supplys at the output of each power supply, are provided with a circuit breaker; And
A plurality of feeder terminal units, each feeder terminal unit includes on-load switch and communicator, and described communicator is with the communication between each feeder terminal unit;
Connect into transmission and distribution networks by tree between described a plurality of power supply and the described a plurality of feeder terminal unit;
On the branch between per two power supplys, setting a feeder terminal unit is open loop point feeder terminal unit, and under the normality, the on-load switch of this open loop point feeder terminal unit is in gate-dividing state;
Described transmission and distribution networks control method comprises:
Failure detection steps: described a plurality of feeder terminal units detect the operating current of the described on-load switch in it at any time, when breaking down in the network, the circuit breaker that provides the power output end place of electric power to be provided with for this fault point opens circuit, simultaneously corresponding feeder terminal unit detects fault current, and sends fault message by the communicator in it to all feeder terminal units;
Fault location step: the fault message that described all feeder terminal units send according to the corresponding feeder terminal unit that obtains, the fault point is positioned, positioning principle is that each current feed terminal that detects fault current is positioned, if do not detect fault current with this feeder terminal unit next-door neighbour's who detects this fault current sub-feeder terminal unit, then the fault point is at this feeder terminal unit that detects this fault current and be in close proximity between the feeder terminal unit that does not detect fault current of the feeder terminal unit that detects this fault current, and the feeder terminal unit that will detect this fault current is called the fault point feeder terminal unit;
Fault Isolation step: the on-load switch separating brake in the feeder terminal unit of described fault point, and send the separating brake instruction to its downstream with feeder terminal unit fault point feeder terminal unit next-door neighbour by its communicator, described downstream and feeder terminal unit fault point feeder terminal unit next-door neighbour instruct its internal loading switch separating brake after receiving described separating brake instruction;
The separating brake reporting step: described fault point feeder terminal unit and described downstream and feeder terminal unit fault point feeder terminal unit next-door neighbour are after the separating brake action is finished, and the communicator by separately is to other feeder terminal unit send state information;
Combined floodgate step: the set separating brake breaker closing of the output at the power supply that electric power is provided for the fault point that will open circuit.
Preferably, in control method of the present invention, in described failure detection steps, when breaking down, after the circuit breaker that is provided with at the power output end place that electric power is provided for the fault point opens circuit, and before the communicator of corresponding feeder terminal unit sent fault message, the set circuit breaker of output at the power supply that electric power is provided for the fault point that will open circuit earlier closed once.
Preferably, in control method of the present invention, described combined floodgate step comprises the following steps:
Specify the open loop point feeder terminal unit of an acquiescence for feeder terminal unit, the described downstream of separating brake and feeder terminal unit fault point feeder terminal unit next-door neighbour by its communicator to the open loop point feeder terminal unit transmission reclosing command of its acquiescence, after the open loop point feeder terminal unit of described acquiescence receives this reclosing command, instruct its interior on-load switch to close a floodgate.
Owing to do not adopt master station computer in the control method of the present invention, even the communication of therefore indivedual feeder terminal units is broken down, control algolithm of the present invention also can the minimize on use isolated fault, and can not cause whole network to recover.
More detailed technical characterictic of the present invention, advantage and effect will be for a more detailed description below in conjunction with appended accompanying drawing.
Description of drawings
Fig. 1 is the structural representation of power transmission and distribution network system of the present invention.
Embodiment
In the power transmission and distribution network system, as shown in Figure 1, generally include power supply S1, S2 and S3 and feeder terminal unit FTU1... etc. at present.Certainly also include equipment such as transformer station,, therefore, in drawings and Examples, do not mark and describe, only described relevant parts because the present invention does not relate to these equipment.
In the present embodiment, only drawn power supply S1, S2 and S3, but should be appreciated that the quantity of power supply can be decided according to the actual requirements, the quantity that should not be limited in the present embodiment to be exemplified.At the output of each power supply, all be provided with circuit breaker DL1, a DL2, DL3.Connect into transmission and distribution networks by tree between power supply S1, S2, S3, circuit breaker DL1, DL2 and DL3 and each feeder terminal unit, present embodiment is the convenient example that shows a better simply tree network of describing.In the practice, this network can be very complicated, and can adopt the network configuration of various types, the looped network of for example radial net, tree network, open loop operation etc.Method of the present invention all is applicable to these networks.
Because the operation rule of China's electric power regulation, transmission and distribution networks does not allow the cyclization operation, therefore, go up (on the branch between two power supplys) in the whole transmission and distribution networks in position and be provided with the open loop point, be positioned under the normality of the feeder terminal unit on the open loop point and be in gate-dividing state, and the feeder terminal unit on this open loop point is called open loop point feeder terminal unit, thereby transmission and distribution networks is separated into the several separate power supply area, and promptly any one load area is simultaneously only by a power supply power supply.Please cooperate referring to Fig. 1, in the embodiment in figure 1, FTU3 and FTU7 are set to open loop point feeder terminal unit, are in gate-dividing state under normal conditions.So whole transmission and distribution networks is separated into three zones:
Zone by power supply S1 power supply comprises: FTU1, FTU2, four common feeder terminal units of FTU5, FTU6 and FTU3, two open loop point terminals of FTU7 unit;
Zone by power supply S2 power supply comprises: common feeder terminal unit of FTU4 and an open loop point terminal of FTU3 unit;
Zone by power supply S3 power supply comprises: FTU8, FTU9, four common feeder terminal units of FTU10, FTU11 and an open loop point terminal of FTU7 unit.
Suppose that fault has taken place the A point among Fig. 1, as can be seen from Figure 1, this fault point A is in the zone of power supply S 1 power supply, and according to convention, all the feeder terminal unit FTU1 and the FTU2 of A upstream, this fault point all can detect trouble power.Simultaneously, the circuit breaker DL1 in this zone is with automatic trip, with the protection transmission and distribution networks.From Fig. 1 analysis as can be known, the positioning principle of fault point is if a feeder terminal unit detects fault current, but do not detect feeder terminal unit with the feeder terminal unit next-door neighbour's who detects fault current sub-feeder terminal unit, then the fault point is at the feeder terminal unit that detects this fault current and be in close proximity between the feeder terminal unit that does not detect fault current of the feeder terminal unit that detects this fault current.According to this principle, we can do reverse judgement to the embodiment of Fig. 1, promptly only detect fault current at feeder terminal unit FTU1 and FTU2, and other feeder terminal unit, when for example FTU3, FTU5, FTU6 all do not detect fault current, according to mentioned above principle, can judge, the fault point is between the FTU5 of feeder terminal unit FTU2 and its next-door neighbour's downstream.
In the present invention, each feeder terminal unit all contains a communicator (not shown), be used for and other feeder terminal unit between communicate.After feeder terminal unit FTU1 and FTU2 detect fault current, send fault message by each other feeder terminal unit of the communicator in it at once.All preserve an information table in each feeder terminal unit, store the distributing position information of all feeder terminal units in the whole transmission and distribution networks system and whether detect fault and divide-shut brake information.After receiving fault message, each feeder terminal unit is according to this information table of information updating that receives.
For fear of the short-duration failure that causes owing to various accidentalia, can also increase a breaker closing step, when promptly in network, breaking down, behind the circuit breaker trip, the feeder terminal unit that detects fault current does not send earlier fault message at once, and circuit breaker closes a floodgate once earlier, if this moment, fault still existed, then circuit breaker will trip once more, and at this moment, the feeder terminal unit that detects trouble power then outwards sends information at once.
After above-mentioned fault detect, enter the fault location step.Because each feeder terminal unit is all preserved the information table of all feeder terminal units in the record network, therefore,,, can judge that and be the fault point feeder terminal unit by above-mentioned fault location principle according to information table.In the embodiment in figure 1, FTU2 is judged as the fault point feeder terminal unit.
After fault location, enter the Fault Isolation step, be judged as the on-load switch separating brake in the feeder terminal unit FTU2 of fault point, and send separating brake by the communicator in it to all next-door neighbours' in its downstream feeder terminal unit FTU5 and instruct, Jin Lin feeder terminal unit FTU3, FTU6 do not send out the separating brake instruction.Downstream feeder terminal unit FTU5 instructs on-load switch separating brake in it after receiving separating brake instruction, so far finish Fault Isolation.
After having isolated fault, fault point feeder terminal unit FTU2 and downstream feeder terminal unit FTU5 are after the separating brake action is finished, communicator by separately is to other feeder terminal unit send state information, the information table so that each feeder terminal unit upgrades in time.
At last, the circuit breaker DL1 of automatic brake separating closes a floodgate when breaking down, and (combined floodgate of circuit breaker DL1 generally is automatic, automatic closing can be realized by dual mode: a kind ofly come automatic closing by setting time-delay, delay time can be set by calculating the Fault Isolation time.Another kind can be installed feeder terminal unit FTU at power supply point, and after power supply point feeder terminal unit FTU received the sub-gate signal of fault point feeder terminal unit, circuit breaker DL1 automatically closed)
After above-mentioned circuit breaker DL1 closed a floodgate, the power supply to the upstream, fault point can recover in the transmission and distribution networks system.For the power supply in downstream, fault point, can restore electricity by following mode.As shown in Figure 1,, just whole network is divided into a plurality of power supply areas by power supply, has only a power supply in each power supply area by open loop point feeder terminal unit owing in present transmission and distribution networks system, have a plurality of power supplies.The network system of this layout after breaking down and this fault having been carried out isolate, exist by Iterim Change open loop point reconfigure power supply area may.
In the embodiment in figure 1, in Fault Isolation after, the downstream feeder terminal unit FTU5 of separating brake can send reclosing command to the open loop point feeder terminal unit FTU3 that is adjacent by its communicator, after open loop point feeder terminal unit FTU3 receives this reclosing command, on-load switch in it is closed a floodgate, enter normally off, become a common feeder terminal unit, the feeder terminal unit FTU5 and the FTU6 in A downstream, fault point are put under in the zone that is powered by power supply S2, thereby finish the service restoration step in downstream, fault point.
Can also adopt following mode for downstream service restoration mode:, be the open loop point feeder terminal unit that each feeder terminal unit is specified an acquiescence initially.At the embodiment of Fig. 1, for the acquiescence open loop point feeder terminal unit of feeder terminal unit FTU5 appointment is FTU7.Need to prove that above-mentioned appointment only is an embodiment, the open loop point feeder terminal unit of specify default can be decided according to the network configuration and the actual needs of reality, no longer is explained in detail at this.
Situation for the acquiescence open loop point feeder terminal unit of appointment, the downstream feeder terminal unit FTU5 of separating brake sends reclosing command by its communicator to the open loop point feeder terminal unit FTU7 with its acquiescence, after the open loop point feeder terminal unit FTU7 of acquiescence receives this reclosing command, instruct its interior on-load switch to close a floodgate, thereby recover electric load power supply feeder terminal unit FTU5, FTU6 downstream.
No main website transmission and distribution networks control method for the invention described above remakes some supplementary notes:
Control method of the present invention can adopt traditional feeder terminal unit with detection failure electric current, and this feeder terminal unit includes the on-load switch of traditional structure.
Corresponding to the improvement of method of the present invention, these feeder terminal units also include corresponding memory module, control analysis module and communication module.Memory module is used to store above-mentioned information table, and tableau format does not limit at this for information about, and those skilled in the art can design the information table form that can reach requirement of the present invention fully according to prior art.The control analysis module can adopt microprocessing unit, is realized that with the form of software concrete implementation also is that those skilled in the art also know.Communication module can adopt mature ethernet technology, to realize instant network service.
Claims (3)
1. power transmission and distribution control method can be used for not having the transmission and distribution networks system of main website, and the transmission and distribution networks system of described no main website comprises: a plurality of power supplys at the output of each power supply, are provided with a circuit breaker; And
A plurality of feeder terminal units, each feeder terminal unit includes on-load switch and communicator, and described communicator is used for the communication between each feeder terminal unit;
Connect into transmission and distribution networks by tree between described a plurality of power supply and the described a plurality of feeder terminal unit;
On the branch between per two power supplys, setting at least one feeder terminal unit is open loop point feeder terminal unit, and under the normality, the on-load switch of this open loop point feeder terminal unit is in gate-dividing state;
Described power transmission and distribution control method comprises:
Failure detection steps: described a plurality of feeder terminal units detect the operating current of the described on-load switch in it at any time, when breaking down in the network, the circuit breaker that provides the power output end place of electric power to be provided with for the fault point opens circuit, simultaneously corresponding feeder terminal unit detects fault current, and sends fault message by the communicator in it to all feeder terminal units;
Fault location step: the fault message that described all feeder terminal units send according to the corresponding feeder terminal unit that obtains, the fault point is positioned, positioning principle is that each current feed terminal that detects fault current is positioned, if do not detect fault current with this feeder terminal unit next-door neighbour's who detects this fault current feeder terminal unit, then the fault point is at this feeder terminal unit that detects this fault current and be in close proximity between the feeder terminal unit that does not detect fault current of the feeder terminal unit that detects this fault current, and the feeder terminal unit that will detect this fault current is called the fault point feeder terminal unit;
Fault Isolation step: the on-load switch separating brake in the feeder terminal unit of described fault point, and send the separating brake instruction to its downstream with feeder terminal unit fault point feeder terminal unit next-door neighbour by its communicator, described downstream and feeder terminal unit fault point feeder terminal unit next-door neighbour instruct its internal loading switch separating brake after receiving described separating brake instruction;
The separating brake reporting step: described fault point feeder terminal unit and described downstream and feeder terminal unit fault point current feed terminal list next-door neighbour are after the separating brake action is finished, and the communicator by separately is to other feeder terminal unit send state information;
Combined floodgate step: the set breaker closing of output at the power supply that electric power is provided for the fault point that will open circuit.
2. control method as claimed in claim 1, it is characterized in that, in described failure detection steps, when breaking down, after the circuit breaker that is provided with at the power output end place that electric power is provided for the fault point opens circuit, and before the communicator of corresponding feeder terminal unit sent fault message, the set circuit breaker of output at the power supply that electric power is provided for the fault point that will open circuit earlier closed once.
3. control method as claimed in claim 1 is characterized in that, described combined floodgate step comprises the following steps:
Specify the open loop point feeder terminal unit of an acquiescence for feeder terminal unit, the described downstream of separating brake and feeder terminal unit fault point feeder terminal unit next-door neighbour by its communicator to the open loop point feeder terminal unit transmission reclosing command of its acquiescence, after the open loop point feeder terminal unit of described acquiescence receives this reclosing command, instruct its interior on-load switch to close a floodgate.
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| CNB2005100243790A CN100376069C (en) | 2005-03-14 | 2005-03-14 | Non-master station transinission and distribution network control method |
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| CNB2005100243790A CN100376069C (en) | 2005-03-14 | 2005-03-14 | Non-master station transinission and distribution network control method |
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| CN100376069C true CN100376069C (en) | 2008-03-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102213735A (en) * | 2011-03-04 | 2011-10-12 | 中国电力科学研究院 | Typical test network with power distribution automation |
| CN102707198A (en) * | 2012-06-21 | 2012-10-03 | 冀北电力有限公司张家口供电公司 | Feeder automation failure positioning method based on failure backcasting |
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| CN1835334A (en) | 2006-09-20 |
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