CN103840439B - Main website coordinates the power distribution automation guard method realized with distributed terminal - Google Patents
Main website coordinates the power distribution automation guard method realized with distributed terminal Download PDFInfo
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Abstract
A kind of main website coordinates the power distribution automation guard method realized with distributed terminal; when power distribution network generation single failure; distribution power automation terminal determines fault zone; the breaker controlling power distribution network outlet disconnects; then the block switch at two ends, distribution power automation terminal open failure region; carry out Fault Isolation; last distribution power automation terminal controls the breaker of power distribution network outlet, interconnection switch and block switch Guan Bi; turn the load in distribution network fault-free region, it is achieved the service restoration in fault-free district.Power supply reliability of the present invention is high, and failure recovery time is short, and power failure range is little, transforms low with operation and maintenance expenses, improves distribution planning level, reduce grid line loss, improve distribution scheduling managerial skills, improve repairing operating efficiency.
Description
Technical field
The present invention relates to a kind of main website and coordinate the power distribution automation guard method realized with distributed terminal.
Background technology
Shanghai City is China the first big city, and one of four municipality directly under the central government are China's economy, finance, trade and shipping centre.2012, Shanghai City GCP reached 2.01 trillion RMB, whole world ranking 11.GCP and per capita disposable income all occupy national each provinces and regions and municipality directly under the Central Government is the first per capita.Shanghai is currently under the development key period of " industrial transformation ", puts forth effort to make that " four " center " international economy centers, international financial center, International Trade Center, International shipping centers, whole city's power supply capacity level is just had higher requirement by this.
Pudong New Area, Shanghai whole district area 1210.41 square kilometres, determine since " Pudong's great development ", to have gone through the development of more than 20 years for the Party Central Committee, State Council from nineteen ninety, build the key areas such as Golden Bridge, Zhangjiang National R&D Program, Waigaoqiao Bonded Zone, Lujiazui Financial and Trade Zone.On July 3rd, 2013, " China (Shanghai, free trade trial zone " granted, settle coastal 28 square kilometres of Pudong New District, indicate the ground zero of Shanghai Metallurgical Industry.The district maximum, most active as the whole city, Pudong New District is including that all many-sides such as economic development, industrial transformation lead the whole city.
The construction scope of Pudong's core space power distribution network is the riverine core space of Pudong's Huangpu River, and west to Huangpu River, north, to Huangpu River, to the east of Pudong South Road, south to the Hua Lu that shines, takes up an area about 10 square kilometres.Quickly increasing of this core area power load and naturally extending of distribution line, unavoidably cause the problems such as blur boundary, crossing elimination, roundabout power supply, affect power supply reliability and line loss lean.
Although the history power supply reliability of Pudong's core space is in higher level at home, but compares and represent the international Advanced Cities such as the Singapore of world-class level, Tokyo, Hong Kong, Paris, gap is bigger.2013, State Grid Corporation of China promulgated " distribution network planning designing technique directive/guide ", proposes large size city nucleus is defined as A+ region, integrates with world-class level, it is achieved the power supply reliability developing goal higher than 99.999%.Therefore, the developing goal that the either electric service level in international metropolis's core city, or State Grid Corporation of China fire protection technology proposes, all Pudong's core space is proposed higher power supply reliability requirement.
In terms of 10kV medium voltage distribution network grid structure, core space compares Guo Wang company, Shanghai company Guidelines, and belonging to phenomenon lack of standardization, atypical mainly has three kinds:
1, trolley line segmentation capacity is bigger than normal, gets in touch with on the low side；
2, current techniques principle is not met according to the type III power distribution station of old plant construction；
3, there is atypia wiring in trolley line.
And by contrast international advanced metropolis distribution net work structure, such as Tokyo, Singapore, Hong Kong, Paris etc., the deficiency summing up the existence of core space current rack includes:
1, to share rate higher at part transformer station interval；
2, on switchyard, level power supply is all from the different buses of same transformer station, belongs to two grades of dual power supplies；
3, major part looped network on level power supply from same transformer station (switchyard, different buses, belong to two grades of dual power supplies；
4, switchyard total number is on the low side, and 10kV is spaced anxiety；
5, there is the little ring network structure of macrocyclic net, power distribution automation is disposed and brings technical difficulty；
6, weakness laterally got in touch with by rack, and rack load transfer ability is limited.
For solving above-mentioned distribution network structure aspect existing problems, core space need to strengthen distribution grid structure, optimizes the mode of connection, reduce circuit Rate of average load, strengthen load transfer ability, study and define normalized distribution Connection Mode, and according to unified standard, high-quality construction.
Pudong's core space is currently without implementing electrical power distribution automatization system; three distantization of distribution net equipment, the visualization of distribution scheduling, the automation of network reconfiguration cannot be realized by automation means; and the intellectuality of distribution management, with world-class, the distance of the most domestic advanced person has a long way to go.Thering is provided without electrical power distribution automatization system quick, reliable and support, power supply reliability cannot meet the requirement of " distribution network planning designing technique directive/guide ".For improving power supply reliability further, it is achieved intelligentized distribution management is target, it is necessary to adapt to target net, electric network fault rapidly self-healing, a simple, practical and reliable FEEDER AUTOMATION in core space application.
Pudong's core space there is problems in that in terms of power distribution automation
Distribution Network Frame construction and upgrading do not synchronize to consider power distribution automation application demand, cause automation to be layouted dispersion, it is impossible to formation scale and benefit.
Due to distribution terminal and communication device problem, cause a large amount of invalid signals, have a strong impact on distribution scheduling monitoring.
The device such as distribution terminal, communication lacks standardization installation and debugging, the specification of Function detection and technological means.
EPON communication is affected relatively big by external environmental factor, and communication momentary interruption frequently occurs.
Electrical power distribution automatization system O&M security system still needs to the most perfect.
Electrical power distribution automatization system O&M relates to dispatching, communicates, transports multiple links such as inspection, still suffers from maintenance work interface unintelligible, the situation that O&M flow process has some setbacks between each link；The configuration of automation O&M teams and groups is not in place, and personnel delimit the organizational structure problem the most clearly.Lack the complete cultivating system of comprehensive automation professional and technical personnel and excitation；Basis operation maintenance personnel specialized capability and the profit reduction and reserving of business skill level operate at the O&M of primary equipment, urgently promote, professional technique training for new technology, new equipment is not enough for a long time, and O&M strength relies on outer strength of entrusting substantially, it is impossible to adapt to the demand of electrical power distribution automatization system equipment operation maintenance.
Summary of the invention
The present invention provides a kind of main website to coordinate the power distribution automation guard method realized with distributed terminal; power supply reliability is high; failure recovery time is short; power failure range is little; transform low with operation and maintenance expenses, improve distribution planning level, reduce grid line loss; improve distribution scheduling managerial skills, improve repairing operating efficiency.
In order to achieve the above object; the present invention provides a kind of main website to coordinate the power distribution automation guard method realized with distributed terminal; power distribution automation protection is carried out during for power distribution network generation single failure; this power distribution automation guard method realizes based on electrical power distribution automatization system; this electrical power distribution automatization system comprises power distribution automation main website and the distribution power automation terminal of this power distribution automation main website of some connections; described distribution power automation terminal is arranged in the terminal device in power distribution network, and this power distribution automation guard method comprises the steps of
Step 1, when power distribution network generation single failure, distribution power automation terminal determines fault zone；
Step 2, distribution power automation terminal control the breaker of power distribution network outlet and disconnect, it is achieved power-off；
Step 3, the block switch at two ends, distribution power automation terminal open failure region, carry out Fault Isolation；
Step 4, distribution power automation terminal control the breaker of power distribution network outlet, interconnection switch and block switch Guan Bi, turn the load in distribution network fault-free region, it is achieved the service restoration in fault-free district.
Described distribution power automation terminal connects block switch, interconnection switch and the breaker in terminal device.
In step 1, if distribution power automation terminal cannot correctly determine fault zone, then change and determined fault zone by power distribution automation main website, and continued executing with the operation of step 2-step 4 by power distribution automation main website.
In step 3, if distribution power automation terminal cannot isolated fault region, then change by power distribution automation main website isolated fault region, and continued executing with the operation of step 4 by power distribution automation main website.
According to different failure conditions, distribution power automation terminal or power distribution automation main website control the breaker of power distribution network outlet, interconnection switch and block switch and are closed at, or the breaker and the interconnection switch that control power distribution network outlet are closed at, or the breaker of control power distribution network outlet and block switch are closed at.
Power supply reliability of the present invention is high, and failure recovery time is short, and power failure range is little, transforms low with operation and maintenance expenses, improves distribution planning level, reduce grid line loss, improve distribution scheduling managerial skills, improve repairing operating efficiency.
Accompanying drawing explanation
Fig. 1 is the block diagram of electrical power distribution automatization system.
Fig. 2 is the circuit diagram of embodiment 1.
Fig. 3 is the circuit diagram of embodiment 2.
Fig. 4 is the circuit diagram of embodiment 3.
Fig. 5 is the circuit diagram of embodiment 4.
Fig. 6 is the flow chart of the present invention.
Detailed description of the invention
Below according to Fig. 1～Fig. 6, illustrate presently preferred embodiments of the present invention.
Fig. 1 is the block diagram of electrical power distribution automatization system, this electrical power distribution automatization system comprises power distribution automation main website 11 and the distribution power automation terminal 12 of this power distribution automation main website 11 of some connections, described distribution power automation terminal 12 is arranged in the terminal device in power distribution network, and this distribution power automation terminal 12 connects the block switch in terminal device, interconnection switch and breaker.
A kind of main website that the present invention provides coordinates the power distribution automation guard method realized with distributed terminal, and it realizes based on the power distribution automation main website in electrical power distribution automatization system and distribution power automation terminal.
The power distribution automation guard method of the present invention is described below according to four specific embodiments.
Embodiment 1
As shown in Figure 2, it it is a kind of Distribution Network Frame wiring construction, this Distribution Network Frame wiring construction comprises some switchyards and transformer station, described switchyard comprises the first paragraph bus and second segment bus connected by block switch, every section of bus connects one back into line respectively, some returns back out line and an interconnection, the two of this switchyard connect different transformer stations respectively back into line, interconnection is set between switchyard, one end of interconnection connects the first paragraph bus of a switchyard, and the other end of interconnection connects the second segment bus of another switchyard.
On described interconnection, interconnection switch is set, described interconnection switch is separately positioned on the side connecting a switchyard second segment bus and the first paragraph bus side connecting another switchyard, the interconnection switch of second segment bus side, connecting valve station is normally opened stand-by heat switch, and the interconnection switch of the first paragraph bus side at connecting valve station is normally closed switch.
Arranging optical-fiber longitudinal difference protection module on the inlet wire of described switchyard, can realize complete fibre, tripping faulty line selectable, quick when circuit internal fault, this optical-fiber longitudinal difference protection module comprises current transformer and the breaker of series connection.
Interconnection switch on breaker on the inlet wire of described switchyard, the block switch on switchyard and interconnection connects distribution power automation terminal respectively, and these some distribution power automation terminals connect power distribution automation main website.
Stream, zero stream protection module and distribution power automation terminal, track section fault were set in the outlet of described switchyard, after distribution self-healing distribution terminal isolated fault, recover wiretap and interconnection switch makes circuit restoring power supply in non-broken-down section.
Stream, zero stream protection module and optical-fiber longitudinal difference protection module were set on the interconnection of described switchyard, complete fibre, tripping faulty line selectable, quick can be realized when interconnection internal fault.
Described distribution power automation terminal and power distribution automation main website have distant place switching and control function, and non-faulting dead electricity section can switch to the power supply in other paths by distribution power automation terminal and power distribution automation main website and be powered.
nullAs shown in Figure 1，Figure shows switchyard A、Switchyard B and switchyard C，And transformer station 1、Transformer station 2、Transformer station 3 and the annexation of transformer station 4，First paragraph bus and the second segment bus of switchyard A are connected by block switch QF11，First paragraph bus and the second segment bus of switchyard B are connected by block switch QF12，First paragraph bus and the second segment bus of switchyard C are connected by block switch QF13，The inlet wire JX1 that the first paragraph bus 11 of switchyard A connects connects the bus 22 of transformer station 1，The inlet wire JX2 that the second segment bus 12 of switchyard A connects connects the bus 23 of transformer station 2，The inlet wire that the first paragraph bus of switchyard B connects connects the bus 22 of transformer station 1，The inlet wire that the second segment bus of switchyard B connects connects the bus 23 of transformer station 2，The inlet wire that the first paragraph bus of switchyard C connects connects the bus of transformer station 4，The inlet wire that the second segment bus of switchyard C connects connects the bus of transformer station 3，Between first paragraph bus 11 and the second segment bus of switchyard C of switchyard A, interconnection 101 ' is set，The first paragraph bus 11 of connecting valve station, one end A of this interconnection 101 '，The second segment bus of other end connecting valve station C，Between second segment bus 12 and the first paragraph bus of switchyard B of switchyard A, interconnection 101 is set，The second segment bus of one section of connecting valve station A of this interconnection 101，The first paragraph bus of other end connecting valve station B，Between second segment bus and the first paragraph bus of switchyard C of switchyard B, interconnection 101 ' is set '，This interconnection 101 ' ' the second segment bus of connecting valve station, one end B，The first paragraph bus of other end connecting valve station C.
As shown in Figure 1, interconnection switch QF15 and interconnection switch QF16 is set on described interconnection 101, interconnection switch QF15 is arranged on A second segment bus 12 side, connecting valve station, switchs for normally opened stand-by heat, and interconnection switch QF16 is arranged on B first paragraph bus side, connecting valve station；Arranging interconnection switch QF19 and interconnection switch QF14 on described interconnection 101 ', interconnection switch QF19 is arranged on C second segment bus side, connecting valve station, switchs for normally opened stand-by heat, and interconnection switch QF14 is arranged on A first paragraph bus side, connecting valve station；Described interconnection 101 ' ' on interconnection switch QF17 and interconnection switch QF18 is set, interconnection switch QF17 is arranged on B second segment bus side, connecting valve station, and interconnection switch QF18 is arranged on C first paragraph bus side, connecting valve station.
nullAs shown in Figure 1，Described switchyard A、Optical-fiber longitudinal difference protection module is set on the inlet wire of switchyard B and switchyard C，This optical-fiber longitudinal difference protection module comprises current transformer and the breaker of series connection，Optical-fiber longitudinal difference protection module on the inlet wire JX1 of switchyard A comprises the current transformer 102 of series connection and circuit breaker Q F1 and circuit breaker Q F2，Optical-fiber longitudinal difference protection module on the inlet wire JX2 of switchyard A comprises the current transformer of series connection and circuit breaker Q F3 and circuit breaker Q F4，The optical-fiber longitudinal difference protection module on inlet wire on the first paragraph bus of switchyard B comprises the current transformer of series connection and circuit breaker Q F5 and circuit breaker Q F6，The optical-fiber longitudinal difference protection module on inlet wire on the second segment bus of switchyard B comprises the current transformer of series connection and circuit breaker Q F7 and circuit breaker Q F8，The optical-fiber longitudinal difference protection module on inlet wire on the first paragraph bus of switchyard C comprises current transformer and circuit breaker Q F10 of series connection，The optical-fiber longitudinal difference protection module on inlet wire on switchyard C second segment bus comprises current transformer and circuit breaker Q F9 of series connection.
As shown in Figure 1, three switchyards are single mother partition mode of connection, each switchyard has two to return back out line back into line six respectively, the two of each switchyard are back into line from two different substation, contact special line it is furnished with between switchyard between switchyard, time properly functioning, three contact special line one end switch are running status, and other end switch is hot stand-by duty.
When the inlet wire of switchyard breaks down, the Distribution Network Frame wiring construction that the present invention provides can realize Fault Isolation and restore electricity, it is achieved following feed protection:
1, switchyard single failure pattern:
The two of switchyard are back into the arbitrary inlet wire generation power failure dead electricity in line; optical-fiber longitudinal difference protection module action on inlet wire; longitudinal difference protection trip signal is informed distribution power automation terminal in station; the block switch prepared auto restart action of switchyard; block switch closes; dead electricity bus is powered by block switch, and interconnection prepared auto restart now is as second level standby.
As shown in Figure 1; as a example by the inlet wire JX1 of switchyard A breaks down; first paragraph bus 11 dead electricity of switchyard A; optical-fiber longitudinal difference protection module action on inlet wire JX1, circuit breaker Q F1, QF2 trip, and longitudinal difference protection trip signal are informed distribution power automation terminal in station; distribution power automation terminal receives longitudinal difference protection trip signal; and by there being pressure to judge without pressure, carry out the protection act Guan Bi block switch QF11 that autotomys, recover the first paragraph bussed supply of switchyard A；
2, the single maintenance model of switchyard:
N-1 maintenance mode: the arbitrary incoming power of switchyard overhauls, and this station block switch is powered by closing, puts into interconnection prepared auto restart.
Single fault mode under N-1 maintenance mode: assume A stand the maintenance of a certain section of bus incoming power time, arrange A station block switch Guan Bi, now there is A station inlet wire operation troubles, A station interconnection LL2 prepared auto restart will start, interconnection normally opened stand-by heat interconnection switch closes, and B stands one section of bus by one, the two sections of buses in contact tape A station.
Embodiment 2
As it is shown on figure 3, be the second Distribution Network Frame wiring construction, this Distribution Network Frame wiring construction comprise some Single-ring network grid structures, between two groups of Single-ring network grid structures, interconnection is set.
Described Single-ring network grid structure comprises two power stations, and it is connected on the ring main unit between two power stations and some box type transformers, this Single-ring network grid structure also comprises an interconnection switch, this interconnection switch is arranged on box type transformer, for normal open switch, arranging distribution power automation terminal on each box type transformer and ring main unit, control the switch motion in box type transformer and ring main unit, each distribution power automation terminal connects power distribution automation main website.
Described interconnection connects the ring main unit in two groups of Single-ring network grid structures respectively, and the two ends of interconnection are on-load switch, and the on-load switch of one end is normally open, and the on-load switch of the other end is normally off.
As shown in Figure 3, it it is the specific embodiment circuit structure diagram of the Distribution Network Frame wiring construction of the present invention, this Distribution Network Frame wiring construction is that Single-ring network three power supply two main is for Connection Mode, power station is from switchyard, described switchyard comprises the first paragraph bus 12 and second segment bus 13 connected by block switch 11, connect one on every section of bus respectively and connect different transformer stations respectively back into line and some lines that returns back out, inlet wire 1 and the inlet wire 2 of switchyard.
Described Distribution Network Frame wiring construction comprises two groups of Single-ring network grid structures, the outlet 2 that two power stations of first group of Single-ring network grid structure are respectively on the second segment bus of switchyard 1, with the outlet 1 on the first paragraph bus of switchyard 2, in this first group of Single-ring network grid structure, three box type transformers 102 of series connection and a ring main unit 103, one of them box type transformer arranges normally opened interconnection switch QS8；The outlet 1 that two power stations of second group of Single-ring network grid structure are respectively on the first paragraph bus of switchyard 1, with the outlet 2 on the second segment bus of switchyard 2, in this first group of Single-ring network grid structure, four box type transformers 102 of series connection and a ring main unit 103, one of them box type transformer arranges normally opened interconnection switch QS23；Arranging interconnection 101 between two groups of Single-ring network grid structures, connect the ring main unit in two groups of Single-ring network grid structures respectively, the on-load switch QS19 of this interconnection 101 one end is normally open, and the on-load switch QS7 of the other end is normally off.In the outlet 1 of switchyard 1, circuit breaker Q F1 is set, in outlet 2, circuit breaker Q F2 is set, in the outlet 1 of switchyard 2, circuit breaker Q F3 is set, in outlet 2, circuit breaker Q F4 is set, one distribution power automation terminal is set in each outlet of switchyard, arranging distribution power automation terminal on each box type transformer and ring main unit, it controls the switch motion in box type transformer and ring main unit.
When breaking down in Distribution Network Frame wiring construction, the present invention can realize Fault Isolation and restore electricity, it is achieved feed protection, and guard method comprises the steps of
Step 1, distribution power automation terminal control switchyard wire-outgoing breaker and disconnect, it is achieved power-off；
Step 2, distribution power automation terminal exchange operation information, the switch at two ends, open failure region, carry out Fault Isolation；
Step 3, distribution power automation terminal control electric power incoming line breaker, interconnection switch and the Guan Bi of on-load switch, it is achieved the power supply in fault-free district.
According to different failure conditions, distribution power automation terminal controls electric power incoming line breaker, interconnection switch and on-load switch and is closed at, or control electric power incoming line breaker and interconnection switch is closed at, or control electric power incoming line breaker and on-load switch are closed at.
Embodiment 3
As shown in Figure 4, it it is the third Distribution Network Frame wiring construction, for dual-ring network four power supply architecture, this Distribution Network Frame wiring construction comprises two switchyards (switchyard 1 and switchyard 2), and two the distributor track web frames being connected between two switchyards, every distributor track web frame comprises the ring main unit 102 between some outlets being connected on switchyard, ring main unit 102 quantity comprised in every distributor track web frame is consistent, article two, between corresponding in distributor track web frame ring main unit 102, interconnection is set, interannular interconnection switch 101 is set on interconnection, this interannular interconnection switch is normal open switch, in described one of them ring main unit in every distributor track web frame, interconnection switch 103 in ring is set, in this ring, interconnection switch 103 is normal open switch.
Switchyard comprises the first paragraph bus and second segment bus connected by block switch, and first paragraph bus connects inlet wire and some outlets, and outlet arranges breaker, and second segment bus connects inlet wire and some outlets, and outlet arranges breaker.
On each ring main unit, distribution power automation terminal is set, control the switch motion in ring main unit, on breaker in the outlet of each switchyard and interannular interconnection switch, a distribution power automation terminal is set, it controls breaker and the switch motion of interannular interconnection switch, and described some distribution power automation terminals connect power distribution automation main website.
nullAs shown in Figure 4，It it is the specific embodiment circuit structure diagram of the Distribution Network Frame wiring construction of the present invention，Two distributor track web frames are connected between switchyard 1 and switchyard 2，All connect in every distributor track web frame four ring main units 102，Article 1, the outlet at distributor track web frame connecting valve station 1 and the outlet of switchyard 2，In the outlet of switchyard 1, circuit breaker Q F1 is set，In the outlet of switchyard 2, circuit breaker Q F3 is set，On this Article 1 distributor track web frame ring main unit wherein, interconnection switch QS6 in ring is set，In this ring, interconnection switch QS6 is normal open switch，Cut-off point as this Article 1 distributor track web frame，The outlet at Article 2 distributor track web frame connecting valve station 1 and the outlet of switchyard 2，In the outlet of switchyard 1, circuit breaker Q F2 is set，In the outlet of switchyard 2, circuit breaker Q F4 is set，On this Article 1 distributor track web frame ring main unit wherein, interconnection switch QS14 in ring is set，In this ring, interconnection switch QS14 is normal open switch，Cut-off point as this Article 2 distributor track web frame，Thus，In this Distribution Network Frame wiring construction，The power supply area of switchyard 1 is through three-line and three ring main units，The power supply area of switchyard 2 is through two lines road and a ring main unit.Between ring main unit corresponding in every distributor track web frame, interannular interconnection switch, respectively interannular interconnection switch QS17, interannular interconnection switch QS18, interannular interconnection switch QS19 and interannular interconnection switch QS20 are all set.
When breaking down in Distribution Network Frame wiring construction, the present invention can realize Fault Isolation and restore electricity, it is achieved feed protection, and guard method comprises the steps of
Step 1, distribution power automation terminal control switchyard wire-outgoing breaker and disconnect, it is achieved power-off；
Step 2, distribution power automation terminal exchange operation information, the switch at two ends, open failure region, carry out Fault Isolation；
Step 3, controlled interconnection switch and interannular interconnection switch Guan Bi in electric power incoming line breaker, ring by distribution power automation terminal, it is achieved the power supply in fault-free district.
According to different failure conditions, in distribution power automation terminal control electric power incoming line breaker, ring, interconnection switch and interannular interconnection switch are closed at, or interconnection switch is closed in controlling electric power incoming line breaker and ring, or control electric power incoming line breaker and interannular interconnection switch are closed at.
Embodiment 4
As shown in Figure 5, it is the 4th kind of Distribution Network Frame wiring construction, this Distribution Network Frame wiring construction comprises overhead transmission line backbone, this overhead transmission line backbone has four backbone segmentations and three backbone contact sections, forming four segmentations three and get in touch with structure, each backbone segmentation arranges some block switches, this block switch is normally closed switch, arranging an interconnection switch in each backbone contact section, this interconnection switch is normal open switch.
This Distribution Network Frame wiring construction also comprises the some transformer stations connecting described overhead transmission line backbone, the outlet of each transformer station arranges breaker, this breaker arranges fast tripping protection device.
Connect some overhead transmission line branch lines on this overhead transmission line backbone, each overhead transmission line branch line arranges branch line breaker.
Some box type transformers, pole type transformer and individual line subscriber is connected on described overhead transmission line branch line.
Arranging distribution power automation terminal on described each block switch, interconnection switch, breaker and branch line breaker, described some distribution power automation terminals connect power distribution automation main website.
nullAs shown in Figure 5，It it is the specific embodiment circuit diagram of the present invention，This overhead transmission line backbone 11 has four backbone segmentations and three backbone contact sections，First segmentation of backbone、Second segmentation、3rd segmentation、4th segmentation and one of them backbone interconnection are distributed in " work " font，First segmentation of overhead transmission line backbone and one end of the 3rd segmentation connect transformer station 1，One end of second segmentation connects transformer station 2，One end of 4th segmentation connects transformer station 3，Breaker 101 is set in the outlet of transformer station，First segmentation of backbone and the 3rd segmentation are as the backbone section of contact，First segmentation of backbone、Second segmentation、3rd segmentation、Some block switches 102 are all set in the 4th segmentation，In backbone contact section, an interconnection switch 103 is all set，On each overhead transmission line branch line 12, branch line breaker 104 is set，Some box type transformers 106 are connected on overhead transmission line branch line 12、Pole type transformer 105 and individual line subscriber 107.
When breaking down in Distribution Network Frame wiring construction, the present invention can realize Fault Isolation and restore electricity, it is achieved feed protection.
When structure generation backbone fault is got in touch with in overhead transmission line four segmentation three, described overhead transmission line four segmentation three is got in touch with structure feeder line automatic protecting method and is comprised the steps of
Step 1.1, the distribution power automation terminal connected on transformer station's wire-outgoing breaker of fault section and the block switch at fault section two ends detect fault current, and distribution power automation terminal starts, and determines fault section；
The fast tripping protection device that step 1.2, distribution power automation terminal control to connect on transformer station's wire-outgoing breaker of fault section carries out fast tripping protection action, and tripping operation disconnects；
Step 1.3, transformer station's wire-outgoing breaker reclosing；
If transient fault, transformer station's wire-outgoing breaker is after single shot reclosing, and reclosing success, overhead transmission line restores electricity；
If permanent fault, transformer station's wire-outgoing breaker post reclosing acceleration tripping operation disconnects, and carries out step 1.4；
Step 1.4, distribution power automation terminal control the block switch tripping operation of fault section two end and disconnect, isolated fault；
Step 1.5, distribution power automation terminal control interconnection switch Guan Bi, make restoring power supply in non-broken-down section；
When structure generation main split's fault is got in touch with in overhead transmission line four segmentation three, described overhead transmission line four segmentation three is got in touch with structure feeder line automatic protecting method and is comprised the steps of
Distribution power automation terminal on step 2.1, the branch line breaker connected on transformer station's wire-outgoing breaker of fault section and the block switch at fault section two ends and fault section branch line detects fault current, and distribution power automation terminal starts, and determines fault section；
The fast tripping protection device that step 2.2, distribution power automation terminal control to connect on transformer station's wire-outgoing breaker of fault section carries out fast tripping protection action, and tripping operation disconnects, and the branch line circuit breaker trip that distribution power automation terminal controls to connect on the branch line of fault section disconnects；
Step 2.3, transformer station's wire-outgoing breaker reclosing.
In aforementioned four embodiment, the hardware that realizes of power distribution automation protection is distribution power automation terminal, if distribution power automation terminal breaks down, then power distribution automation protection can be completed by power distribution automation main website.
As shown in Figure 6, being the flow chart of the present invention, the main website that the present invention provides coordinates the power distribution automation guard method realized with distributed terminal, carries out power distribution automation protection during for power distribution network generation single failure, and the method includes the steps of:
Step 1, when power distribution network generation single failure, distribution power automation terminal determines fault zone；
Step 2, distribution power automation terminal control the breaker of power distribution network outlet and disconnect, it is achieved power-off；
Step 3, the block switch at two ends, distribution power automation terminal open failure region, carry out Fault Isolation；
Step 4, distribution power automation terminal control the breaker of power distribution network outlet, interconnection switch and block switch Guan Bi, turn the load in distribution network fault-free region, it is achieved the service restoration in fault-free district.
In step 1, if distribution power automation terminal cannot correctly determine fault zone, then change and determined fault zone by power distribution automation main website, and continued executing with the operation of step 2-step 4 by power distribution automation main website.
In step 3, if distribution power automation terminal cannot isolated fault region, then change by power distribution automation main website isolated fault region, and continued executing with the operation of step 4 by power distribution automation main website.
According to different failure conditions, distribution power automation terminal or power distribution automation main website control the breaker of power distribution network outlet, interconnection switch and block switch and are closed at, or the breaker and the interconnection switch that control power distribution network outlet are closed at, or the breaker of control power distribution network outlet and block switch are closed at.
Although present disclosure has been made to be discussed in detail by above preferred embodiment, but it should be appreciated that the description above is not considered as limitation of the present invention.After those skilled in the art have read foregoing, multiple amendment and replacement for the present invention all will be apparent from.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (4)
1. a main website coordinates the power distribution automation guard method realized with distributed terminal; power distribution automation protection is carried out during for power distribution network generation single failure; it is characterized in that; this power distribution automation guard method realizes based on electrical power distribution automatization system; this electrical power distribution automatization system comprises power distribution automation main website and the distribution power automation terminal of this power distribution automation main website of some connections; described distribution power automation terminal is arranged in the terminal device in power distribution network, and this power distribution automation guard method comprises the steps of
Step 1, when power distribution network generation single failure, distribution power automation terminal determines fault zone, if distribution power automation terminal cannot correctly determine fault zone, then change and determined fault zone by power distribution automation main website, and continued executing with the operation of step 2-step 4 by power distribution automation main website；
Step 2, distribution power automation terminal control the breaker of power distribution network outlet and disconnect, it is achieved power-off；
Step 3, the block switch at two ends, distribution power automation terminal open failure region, carry out Fault Isolation；
Step 4, distribution power automation terminal control the breaker of power distribution network outlet, interconnection switch and block switch Guan Bi, turn the load in distribution network fault-free region, it is achieved the service restoration in fault-free district.
2. main website as claimed in claim 1 coordinates the power distribution automation guard method realized with distributed terminal, it is characterised in that described distribution power automation terminal connects block switch, interconnection switch and the breaker in terminal device.
3. main website as claimed in claim 2 coordinates the power distribution automation guard method realized with distributed terminal; it is characterized in that; in step 3; if distribution power automation terminal cannot isolated fault region; then change by power distribution automation main website isolated fault region, and continued executing with the operation of step 4 by power distribution automation main website.
4. main website as claimed in claim 3 coordinates the power distribution automation guard method realized with distributed terminal; it is characterized in that; according to different failure conditions; distribution power automation terminal or power distribution automation main website control the breaker of power distribution network outlet, interconnection switch and block switch and are closed at; or the breaker and the interconnection switch that control power distribution network outlet are closed at, or the breaker of control power distribution network outlet and block switch are closed at.
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