CN105762775A - Power grid self-healing system in 110kV chain type power supply mode and self-healing logic - Google Patents
Power grid self-healing system in 110kV chain type power supply mode and self-healing logic Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- H02J13/0006—
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04S10/16—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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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Abstract
The invention discloses a power grid fault self-healing system in a 110kV chain type power supply mode and self-healing logic. The 110kV chain type power supply mode includes two 220kV power supply stations and a plurality of 110kV serial supply stations connected in series between the two 220kV power supply stations, and a line switch at one side of one of the 110kV serial supply stations is located in a split position and is an open loop point. The self-healing system includes a master station device and a plurality of substation devices connected in series, each 220KV power supply station and each 110kV serial supply station are each provided with one substation device, and the master station device is connected with one of the substation devices; and each substation device is provided with an analog quantity acquisition interface, an input quantity acquisition interface and an output quantity output interface which are used for being connected with a power station so as to acquire an analog quantity signal and a switching value signal of the power station and execute a protection control command sent by the master station device. When a power grid fault occurs, the system provided by the invention can rapidly isolate the fault and start a standby power supply to supply power, thereby realizing a power grid self-healing function in a chain type power supply mode, and improving power supply quality.
Description
Technical field
The present invention relates to the power supply reliability technical field in power automation technology, particularly the electrical network self-healing system under a kind of 110kV chain type powering mode and spontaneous recovery logic thereof.
Background technology
Electric power is the basis of national economy and social development, has penetrated into the various piece of social activity, influences the living of the people and social stability.Power grid security is also the important component part of social public security, being normally carried out of power grid accident meeting severe jamming social life, any accident, all it is likely to result in the social loss that cannot retrieve, even causing social unrest, particularly electric grid large area power cut accident, the harm that society is caused and impact are difficult to estimate, guarantee that power grid security and electric power are supplied in order, be the basic demand built a harmonious socialist society.
The need for electricity and load support that meet large-scale human Settlements user are played vital effect by layout and the improving of rack of high voltage distribution network.Once upper level power supply or line channel break down, by facing the threat that full station has a power failure, there is power supply potential safety hazard in multiple 110kV transformer stations of series connection.Power supply reliability is to weigh the composite target of power supply quality, and the power distribution network of present stage cannot meet the needs of city electrical network fast recovery of power supply.The way of current main flow is, electric network fault is reported to the police to dispatcher by EMS system, and dispatcher arranges the method for operation according to failure condition, then distributes work ticket, and operations staff is controlled to scene, and the service restoration time is a hour level.This service restoration mode cannot meet the power demands of responsible consumer, it is impossible to supports the development of healthy and strong urban electric power network, in the urgent need to carrying out self-healing system transformation, reaches the quick service restoration under failure condition.
Summary of the invention
The technical problem to be solved in the present invention is: by the analog quantity in Real-time Collection power station and on-off model; and the signal collected is carried out accident analysis; result according to accident analysis; the output amount of outputing; Protective Devices for Power is controlled, and then realizes the spontaneous recovery of power system, shorten the power off time that fault causes; improve power supply quality, from source, get rid of such as " false double back ", " statements based on collusion " isostructuralism security risk.
Technical scheme that the present invention takes is particularly as follows: electric network fault self-healing system under a kind of 110kV chain type powering mode, and including the sub-station device of master station device and multiple series connection, master station device connects one of them sub-station device；Sub-station device is provided with analog acquisition interface, intake acquisition interface and the amount of outputing output interface；
110kV chain type powering mode includes two 220kV power stations, and is series at the multiple 110kV statements based on collusion station between two 220kV power stations, and the side line switching at one of them 110kV statements based on collusion station is positioned at a point position, for open loop point；
Each 220kV power station and each 110kV statements based on collusion station are respectively equipped with a sub-station device；
Each sub-station device is by the analog acquisition corresponding power station of interface collection or the act in collusion to make each other's confessions line voltage distribution and line current stood, and calculate busbar voltage according to collection capacity, then the analogue signal collected is converted into the status signal of respective electric amount, and transmission is to master station device；
The on-off model collected, by the on-off model of the intake corresponding power station of acquisition interface collection or statements based on collusion station, is then transmitted to master station device by each sub-station device；
Master station device carries out accident analysis according to the electric parameters status signal received and on-off model, and the electrical control order then according to failure analysis result output, corresponding power station or statements based on collusion stood, to corresponding sub-station device；Sub-station device, according to the electrical control order received, completes the electrical control to corresponding power station or statements based on collusion station by the amount of outputing output interface.
In the present invention, the protection device in power station includes: the 110kV side configuration busbar protective device of 220kV power station and backup auto-activating device；The 110kV side configuration busbar protective device at 110kV statements based on collusion station and equipment for protecting optical fibre longitudinal difference, 10kV side is configured with backup auto-activating device；Wherein the busbar protective device at each 110kV statements based on collusion station and the action connection point of equipment for protecting optical fibre longitudinal difference connect the intake acquisition interface of corresponding sub-station device respectively.
Further, in the present invention, each sub-station device sends and includes bus to the electric parameters status signal of master station device and have pressure, bus to have pressure, circuit to have stream, circuit without stream, line fault electric current, the line fault sense of current, line fault zero-sequence current and line fault negative-sequence current status signal without pressure, circuit without pressure, circuit.Prior art is converted to according to what the line simulation amount collected carried out status signal.
The transmission of each sub-station device includes the signals such as line switching state, maintenance mark, protection act and locking to the on-off model of master station device.
Signal after process is conjugated mode with remote signalling and transmits to master station device by each sub-station device, for logical analysis.
Master station device transmission includes jumping circuit switch and zygonema way switch order to the electrical control order of sub-station device.Analog quantity that master station device transmits according to sub-station device and intake signal carry out the analysis of dependent failure and obtain, and draw corresponding solution, for prior art.Sub-station device passes through tripping operation or the combined floodgate of the amount of outputing Output Interface Control respective lines switch according to electrical control order, to reach power system spontaneous recovery.Simultaneously sub-station device self be also equipped with carrying out PT broken string, CT broken string according to the line simulation amount collected and switching value, close a floodgate after the function such as acceleration.
Owing to the physical distance between power station, statements based on collusion station is up to tens kilometers, in order to ensure real-time and the accuracy that data transmit, between master station device of the present invention and sub-station device, and connected by single-mode fiber between sub-station device, carry out real-time data communication in GOOSE message mode.And without outside packet switch facilities.In order to reduce communication equipment cost, master station device and be all integrated with Ethernet MESSAGE EXCHANGE function inside sub-station device, the communication port connected in series sub-station device at each statements based on collusion station carries out MESSAGE EXCHANGE.
The present invention location recognition power station operational mode in use, master station device receives after sub-station device information, according to statements based on collusion station number and open loop point.When a grid fault occurs, open loop point is different, abort situation is different with fault type, and corresponding spontaneous recovery logic is also not quite similar.As under certain operational mode, if breaking down when causing rear class transformer station dead electricity in the somewhere of chain type statements based on collusion transformer substation system, first master station device identifies position and the type that this fault occurs, then the former main power supply switch at tripping next-door neighbour dead electricity station, trouble point is selected according to spontaneous recovery logic, the small power supply that between excision trouble point and open loop point, statements based on collusion substation is with simultaneously, confirming that position jumped by the former main power supply switch in next-door neighbour dead electricity station, trouble point, circuit without stream and bus without pressure after, close statements based on collusion original place, loop in the line switching of open loop point, by the power supply to dead electricity station of the opposite side power up, it is achieved in the electrical network self-healing function under 110kV chain type powering mode.Spontaneous recovery logic can adopt the logic that existing electric power system fault processes.
Invention additionally discloses the spontaneous recovery logic of electric network fault self-healing system under above-mentioned 110kV chain type powering mode, including:
Recharge logic, judge in chain type wiring, whether a certain statements based on collusion station has side line switching to be positioned at a point position, the line switching at other statements based on collusion station is all closing position simultaneously, and two power station buses have pressure, and all statements based on collusion stations bus has pressure, and it is absent from other discharging condition, if above-mentioned condition meets simultaneously, then self-healing system puts into, and carries out charging to charging successfully；
Electric discharge logic, judge following condition, when meeting one, then self-healing system electric discharge: a open loop point switch closes position, b self-healing system feed motion, the arbitrary statements based on collusion switch of c is jumped by distant jumping or hands, d statements based on collusion switch is refused to jump, two equal buses of power station of e are without pressure, f either switch malposition, the sub-station device at g open loop point place receives abnormal, h receives communication abnormality during arbitrary sub-station device information, certain circuit in power station, i sub-station device place throws maintenance, after j self-healing system action unconfirmed, power station, k open loop point place bus-bar fault, l open loop point offside power station bus-bar fault, m open loop point place line fault, n open loop point place circuit offside switch jump, o open loop point both sides fault, p self-healing system puts into；
And action logic; when self-healing system charges; judge following condition: q acts in collusion to make each other's confessions non-open loop point switch jumping position, station track road without stream; r power station 110kV bus without pressure and outlet without stream; s has bus bar differential prptection operation; t has circuit optical-fiber longitudinal difference protection action, and statements based on collusion station, u open loop point place or its offside statements based on collusion station nothing pressure and inlet wire are without stream；
If meeting one, then self-healing system puts into, and carries out fault location, after waiting tripping operation time delay, performs the trip signal of isolated fault；
When the former main power supply station switch confirming next-door neighbour dead electricity station, trouble point jump position, circuit without stream and bus without pressure after, the line switching of the former open loop point that closes, by the power supply to dead electricity station of the opposite side power up, namely realize the electrical network spontaneous recovery under 110kV chain type powering mode.
In above-mentioned spontaneous recovery logic, " charging " word adopts the term inside automatic switching device of standby power supply, each condition (such as pressing plate, control word, the position of the switch, busbar voltage) of self-healing system permission work starts to charge up after meeting, the charged time (can pass through fixed value adjusting, generally be defaulted as 15 seconds) after complete charging preparation, after charging complete, spontaneous recovery logic could start.Charging herein be interpreted as self-healing system meet working condition, ready.
Beneficial effect
The present invention is by the analog quantity in Real-time Collection statements based on collusion loop and switching value information data, and carries out accident analysis according to the data collected, and then can realize the spontaneous recovery every discrete system of fault.System response speed is fast, improve power supply reliability, improve power supply quality, promote operation of power networks efficiency, and then improve the reliability of electrical network, shorten the power off time that fault causes, such as " false double back ", " statements based on collusion " isostructuralism security risk is got rid of from source, realize the condition of 110kV chain type electric power system spontaneous recovery, make electrical network power supply reliability reach advanced world standards.
Accompanying drawing explanation
Fig. 1 show 110kV chain type powering mode structural representation；
Fig. 2 show self-healing system structural representation of the present invention；
Fig. 3 show sub-station device backboard plug-in unit schematic diagram；
Fig. 4 show master station device backboard plug-in unit schematic diagram；
Fig. 5 show spontaneous recovery logical schematic of the present invention.
Detailed description of the invention
Further describe below in conjunction with the drawings and specific embodiments.
As in figure 2 it is shown, the electric network fault self-healing system under the 110kV chain type powering mode of the present invention, including the sub-station device of master station device and multiple series connection, sub-station device is provided with analog acquisition interface, intake acquisition interface and the amount of outputing output interface；
Shown in Fig. 1,110kV chain type powering mode includes two 220kV power stations, and it is series at the multiple 110kV statements based on collusion station between two 220kV power stations, the side line switching at one of them 110kV statements based on collusion station is positioned at a point position, for open loop point, the line switching at other line switching and other statements based on collusion station is all positioned at conjunction position so that form two statements based on collusion loops when chain type electric power system is properly functioning.
Each 220kV power station and each 110kV statements based on collusion station are respectively equipped with a sub-station device, and master station device connects one of them sub-station device；
Each sub-station device is by the analog acquisition corresponding power station of interface collection or the act in collusion to make each other's confessions line voltage distribution and line current stood, and calculate busbar voltage according to collection capacity, then the analogue signal collected is converted into the status signal of respective electric amount, and transmission is to master station device；
The on-off model collected, by the on-off model of the intake corresponding power station of acquisition interface collection or statements based on collusion station, is then transmitted to master station device by each sub-station device；
Master station device carries out accident analysis according to the electric parameters status signal received and on-off model, and the electrical control order then according to failure analysis result output, corresponding power station or statements based on collusion stood, to corresponding sub-station device；Sub-station device, according to the electrical control order received, completes the electrical control to corresponding power station or statements based on collusion station by the amount of outputing output interface.Simultaneously sub-station device self be also equipped with carrying out PT broken string, CT broken string according to the line simulation amount collected and switching value, close a floodgate after the function such as acceleration.
In conjunction with Fig. 5, based on the spontaneous recovery logic of the electric network fault self-healing system under above-mentioned 110kV chain type powering mode, including:
Recharge logic, judge in chain type wiring, whether a certain statements based on collusion station has side line switching to be positioned at a point position, the line switching at other statements based on collusion station is all closing position simultaneously, and two power station buses have pressure, and all statements based on collusion stations bus has pressure, and it is absent from other discharging condition, if above-mentioned condition meets simultaneously, then self-healing system puts into, and carries out charging to charging successfully；
Electric discharge logic, judge following condition, when meeting one, then self-healing system electric discharge: a open loop point switch closes position, b self-healing system feed motion, the arbitrary statements based on collusion switch of c is jumped by distant jumping or hands, d statements based on collusion switch is refused to jump, two equal buses of power station of e are without pressure, f either switch malposition, the sub-station device at g open loop point place receives abnormal, h receives communication abnormality during arbitrary sub-station device information, certain circuit in power station, i sub-station device place throws maintenance, after j self-healing system action unconfirmed, power station, k open loop point place bus-bar fault, l open loop point offside power station bus-bar fault, m open loop point place line fault, n open loop point place circuit offside switch jump, o open loop point both sides fault, p self-healing system puts into；
And action logic; when self-healing system charges; judge following condition: q acts in collusion to make each other's confessions non-open loop point switch jumping position, station track road without stream; r power station 110kV bus without pressure and outlet without stream; s has bus bar differential prptection operation; t has circuit optical-fiber longitudinal difference protection action, and statements based on collusion station, u open loop point place or its offside statements based on collusion station nothing pressure and inlet wire are without stream；
If meeting one, then self-healing system starts, and carries out fault location, after waiting tripping operation time delay, performs the trip signal of isolated fault；
When the former main power supply station switch confirming next-door neighbour dead electricity station, trouble point jump position, circuit without stream and bus without pressure after, the line switching of the former open loop point that closes, by the power supply to dead electricity station of the opposite side power up, namely realize the electrical network spontaneous recovery under 110kV chain type powering mode.
Embodiment
In embodiment as shown in Figure 1, 2 220kV power stations, act in collusion to make each other's confessions in the chain type powering mode primary connection at station with 3 110kV, open loop point is at D2 switch place, 2 220kV power station band 110kV outlet switch A1 and B1 respectively, each 110kV statements based on collusion station 2 110kV line switchings of band respectively, C and 110kV statements based on collusion station D in 110kV statements based on collusion station is powered by 220kV power station A, 110kV statements based on collusion station E is powered by 220kV power station B, K1-K7 place is it may happen that line fault or bus-bar fault, line switching A1, B1, C1, C2, D1, D2, E1, E2 place is it may happen that switch jump fault, power station is it may happen that bus loss of pressure fault.When there is any of the above-described fault, the self-healing system meeting tripping of the present invention closes on the line switching of trouble point, the open loop point that closes switch D2, it is ensured that the 110kV statements based on collusion station after isolated fault is powered by power station A and the B of both sides respectively.Self-healing system can support the chain type powering mode at 2 220kV power stations, 2 to 4 110kV statements based on collusion stations, and generally the 110kV statements based on collusion station number of chain type Connection Mode is not over 4.
Shown in Fig. 2; self-healing system configures whole locality protection according to the principle of hierarchical control and controls system; a power station arranges master station device wherein; it is respectively provided with sub-station device at power station and statements based on collusion station; the connected in series of physical layer is carried out by single-mode fiber between different sub-station devices; data stream carries out serial data communication by the ethernet switching module that sub-station device is embedded; link layer Y-connection is set up between master station device and sub-station device; simplify communication wires, reduce by using outside switching equipment to carry out the hardware cost of data communication.Sub-station device is converted into switching value the line voltage distribution collected and current-mode analog quantity, for instance bus has pressure, bus to have stream, circuit without signals such as streams without pressure, circuit, opens with other and sends master station device in remote signalling displacement mode together with signal.
Master station device receives the status information that all substations are sent here, when the grid collapses, carries out comprehensive descision, completes spontaneous recovery logic, sends tripping operation, closes a floodgate and order to sub-station device.Sub-station device performs the order of master station device; the tripping operation received, combined floodgate order are converted to normal contact and output and be linked into tradition tripping operation, closing circuit realization jumping, the operation of zygonema way switch, simultaneously completes the functions such as the PT broken string of place transformer station, CT broken string, after accelerated protection.
Protective Devices for Power includes: the 110kV side configuration busbar protective device of 220kV power station and backup auto-activating device；The 110kV side configuration busbar protective device at 110kV statements based on collusion station and equipment for protecting optical fibre longitudinal difference, 10kV side configuration backup auto-activating device.Wherein the busbar protective device at each 110kV statements based on collusion station and the action connection point of equipment for protecting optical fibre longitudinal difference connect the intake acquisition interface of corresponding sub-station device respectively.
In conjunction with Fig. 3 and Fig. 4, the sub-station device back of the body inserts AC plug-in unit, CPU card, NET plug-in unit, IO plug-in unit and power insert.Line voltage distribution and current-mode analog quantity are converted into small-signal by AC plug-in unit, CPU card is responsible for analog acquisition and calculating, substation state logic computing, the integrated ethernet switching module of NET plug-in unit, it is responsible for receiving the breaker tripping and closing order from main website, sends the on-off model of this circuit, and the MESSAGE EXCHANGE of each node of serial link, IO plug-in unit is responsible for opening the collection into signal and tripping operation, combined floodgate outlet.The self-healing system master station device back of the body inserts CPU card, NET plug-in unit and power insert.CPU card is responsible for line status analysis, operational mode identification, spontaneous recovery logical operations and action, and NET plug-in unit is responsible for receiving the line status message from sub-station device, sends tripping operation, closes a floodgate and order.
It is illustrated in figure 5 self-healing system work-based logic of the present invention.In the present embodiment, for the statements based on collusion loop under chain type Connection Mode, each string only one of which switch is in a point position, as long as open loop point switch difference, operational mode is just different.Assume there are 2 power stations, N number of statements based on collusion station, then there is (2+2 × N) individual line switching, i.e. (2+2 × N) individual operational mode, self-healing system can automatically identify the operational mode of correspondence according to the statements based on collusion loop open loop point position of the switch.When the running status in loop of acting in collusion to make each other's confessions under chain type Connection Mode meets default operational mode and charge condition, self-healing system completes charging through time delay in 15 seconds.Under charge condition, meet arbitrary discharging condition, then self-healing system discharges immediately.When grid collapses, self-healing system can automatically select different spontaneous recovery logics realize the purpose of fast recovery of power supply according to operational mode, fault type, abort situation.After self-healing system completes fault location, complete set start-up, perform the trip signal (simultaneously send tripping small power supply order) of isolated fault after waiting tripping operation time delay, confirm that trip switch becomes point position and without waiting after stream mode that the combined floodgate time delay open loop point that closes switchs again.In figure, TU1 is tripping operation time delay, and TU3 is combined floodgate time delay.
Self-healing system action logic and 110kV statements based on collusion station number, open loop point position, electric network fault type are closely related.During electric network fault, self-healing system master station device selects applicable spontaneous recovery logic according to statements based on collusion station number, open loop point position, fault type, the former main power supply switch at tripping next-door neighbour dead electricity station, trouble point, and statements based on collusion original place, loop of closing is in the line switching of open loop point.For 2 shown in Fig. 1 220kV power station, 3 110kV statements based on collusion stations, open loop points at D2 switch place chain type powering mode, analyze its fault actions logic, shown in table 1 specific as follows:
Table 1
| Sequence number | Fault location | Self-healing system action logic |
| 1. | K1 point failure | TRIP C1, combination switch D2 |
| 2. | K2 point failure | TRIP D1, combination switch D2 |
| 3. | K3 point failure | TRIP D1, combination switch D2 |
| 4. | K4 point failure | Electric discharge |
| 5. | K5 point failure | Electric discharge |
| 6. | K6 point failure | Electric discharge |
| 7. | K7 point failure | TRIP E2, combination switch D2 |
| 8. | The 110kV bus of power station A without pressure, A1C1 line is without stream | TRIP C1, combination switch D2 |
| 9. | The 110kV bus of power station B without pressure, E2B1 line is without stream | TRIP E2, combination switch D2 |
| 10. | Switch A1 or switch C1 jump | TRIP C1, combination switch D2 |
| 11. | Switch C2 or switch D1 jump | TRIP D1, combination switch D2 |
| 12. | Switch E1 jump | Electric discharge |
| 13. | Switch E2 or switch B1 jump | TRIP E2, combination switch D2 |
During according to fault, the switch of tripping is different, and situation about table above being listed can be divided into following a few class situation:
When switch A1 jump, switch C1 jump, K1 point failure either condition meet, self-healing system TRIP C1, confirm that switch C1 tripping and statements based on collusion station D are without pressure, run circling point switch D2, electric discharge jointly；
When switch C2 jump, switch D1 jump, K2 point failure, K3 point failure either condition meet, self-healing system TRIP D1, confirm that switch D1 tripping and statements based on collusion station D are without pressure, run circling point switch D2, electric discharge jointly；
When switch E1 jump, K4 point failure, K5 point failure, K6 point failure either condition meet, self-healing system discharges；
When switch E2 jump, switch B1 jump, K7 point failure either condition meet, self-healing system TRIP E2, confirm that switch E2 tripping and statements based on collusion station E are without pressure, run circling point switch D2, electric discharge jointly；
The 110kV bus of 220kV power station A is without pressure, A1C1 line without when flowing, and self-healing system TRIP C1, confirmation switch C1 tripping and statements based on collusion station D, without pressure, run circling point jointly and switch D2, discharge；
The 110kV bus of 220kV power station B is without pressure, E2B1 line without when flowing, and self-healing system TRIP E2, confirmation switch E2 tripping and statements based on collusion station E, without pressure, run circling point jointly and switch D2, discharge.
To sum up, self-healing system of the present invention can quickly realize the spontaneous recovery every discrete system of fault, improve power supply reliability, improve power supply quality, promote operation of power networks efficiency, and then improve the reliability of electrical network, shorten the power off time that fault causes, from source, get rid of such as " false double back ", " statements based on collusion " isostructuralism security risk, it is achieved the condition of 110kV system self-healing, make electrical network power supply reliability reach advanced world standards.
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the technology of the present invention principle; can also making some improvement and deformation, these improve and deformation also should be regarded as protection scope of the present invention.
Claims (5)
1. the electric network fault self-healing system under 110kV chain type powering mode, is characterized in that: including master station device and the sub-station device of multiple series connection, master station device connects one of them sub-station device；Sub-station device is provided with analog acquisition interface, intake acquisition interface and the amount of outputing output interface；
110kV chain type powering mode includes two 220kV power stations, and is series at the multiple 110kV statements based on collusion station between two 220kV power stations, and the side line switching at one of them 110kV statements based on collusion station is positioned at a point position, for open loop point；Each 220kV power station and each 110kV statements based on collusion station are respectively equipped with a sub-station device；
Each sub-station device is by the analog acquisition corresponding power station of interface collection or the act in collusion to make each other's confessions line voltage distribution and line current stood, and calculate busbar voltage according to collection capacity, then the analogue signal collected is converted into the status signal of respective electric amount, and transmission is to master station device；
The on-off model collected, by the on-off model of the intake corresponding power station of acquisition interface collection or statements based on collusion station, is then transmitted to master station device by each sub-station device；
Master station device carries out accident analysis according to the electric parameters status signal received and on-off model, and the electrical control order then according to failure analysis result output, corresponding power station or statements based on collusion stood, to corresponding sub-station device；Sub-station device, according to the electrical control order received, completes the electrical control to corresponding power station or statements based on collusion station by the amount of outputing output interface.
2. the electric network fault self-healing system under 110kV chain type powering mode according to claim 1, is characterized in that: each sub-station device sends and includes bus to the electric parameters status signal of master station device and have pressure, bus to have pressure, circuit to have stream, circuit without stream, line fault electric current, the line fault sense of current, line fault zero-sequence current and line fault negative-sequence current status signal without pressure, circuit without pressure, circuit.
3. the electric network fault self-healing system under 110kV chain type powering mode according to claim 1, is characterized in that: master station device transmission includes jumping circuit switch and zygonema way switch order to the electrical control order of sub-station device.
4. the electric network fault self-healing system under 110kV chain type powering mode according to claim 1, be is characterized in that: between master station device and sub-station device, and is connected by single-mode fiber between sub-station device, carry out real-time data communication in GOOSE message mode.
The spontaneous recovery logic of the electric network fault self-healing system under 5.110kV chain type powering mode, is characterized in that, including:
Recharge logic, judge in chain type wiring, whether a certain statements based on collusion station has side line switching to be positioned at a point position, the line switching at other statements based on collusion station is all closing position simultaneously, and two power station buses have pressure, and all statements based on collusion stations bus has pressure, and it is absent from other discharging condition, if above-mentioned condition meets simultaneously, then self-healing system puts into, and carries out charging to charging successfully；
Electric discharge logic, judge following condition, when meeting one, then self-healing system electric discharge: a open loop point switch closes position, b self-healing system feed motion, the arbitrary statements based on collusion switch of c is jumped by distant jumping or hands, d statements based on collusion switch is refused to jump, two equal buses of power station of e are without pressure, f either switch malposition, the sub-station device at g open loop point place receives abnormal, h receives communication abnormality during arbitrary sub-station device information, certain circuit in power station, i sub-station device place throws maintenance, after j self-healing system action unconfirmed, power station, k open loop point place bus-bar fault, l open loop point offside power station bus-bar fault, m open loop point place line fault, n open loop point place circuit offside switch jump, o open loop point both sides fault, p self-healing system puts into；
And action logic; when self-healing system charges; judge following condition: q acts in collusion to make each other's confessions non-open loop point switch jumping position, station track road without stream; r power station 110kV bus without pressure and outlet without stream; s has bus bar differential prptection operation; t has circuit optical-fiber longitudinal difference protection action, and statements based on collusion station, u open loop point place or its offside statements based on collusion station nothing pressure and inlet wire are without stream；
If meeting one, then self-healing system starts, and carries out fault location, after waiting tripping operation time delay, performs the trip signal of isolated fault；
When the former main power supply station switch confirming next-door neighbour dead electricity station, trouble point jump position, circuit without stream and bus without pressure after, the line switching of the former open loop point that closes, by the power supply to dead electricity station of the opposite side power up, namely realize the electrical network spontaneous recovery under 110kV chain type powering mode.
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| CN201610196800.4A CN105762775A (en) | 2016-03-31 | 2016-03-31 | Power grid self-healing system in 110kV chain type power supply mode and self-healing logic |
| PCT/CN2016/099711 WO2017166735A1 (en) | 2016-03-31 | 2016-09-22 | Power-grid self-healing system and self-healing logic thereof in 110kv chain power-supply mode |
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| CN201610196800.4A CN105762775A (en) | 2016-03-31 | 2016-03-31 | Power grid self-healing system in 110kV chain type power supply mode and self-healing logic |
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| CN114157007A (en) * | 2021-11-17 | 2022-03-08 | 国网山东省电力公司莒县供电公司 | Remote spare power automatic switching system for power plant |
| CN114157007B (en) * | 2021-11-17 | 2024-06-11 | 国网山东省电力公司莒县供电公司 | Remote spare power automatic switching system for power plant |
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Application publication date: 20160713 |