CN103840439A - Power distribution automation protecting method achieved by matching of master station and distributed terminals - Google Patents
Power distribution automation protecting method achieved by matching of master station and distributed terminals Download PDFInfo
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- CN103840439A CN103840439A CN201410122501.7A CN201410122501A CN103840439A CN 103840439 A CN103840439 A CN 103840439A CN 201410122501 A CN201410122501 A CN 201410122501A CN 103840439 A CN103840439 A CN 103840439A
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Abstract
The invention discloses a power distribution automation protecting method achieved by matching of a master station and distributed terminals. When single failure happens to a power distribution network, a failure area is determined by a power distribution automation terminal, a circuit breaker at the line outgoing position of the power distribution network is controlled to be disconnected, afterwards, section switches at the two ends of the failure area are disconnected by the power distribution automation terminal, so that failure isolation is carried out, at last, the power distribution automation terminal controls the circuit breaker at the line outgoing position of the power distribution network, an interconnection switch and the section switches to be closed, the load in a failure-free area of the power distribution network is supplied in a turning mode, and thus power restoration of the failure-free area is achieved. The power distribution automation protecting method is high in power distribution reliability, short in failure recovery time, small in power outage range and low in transformation, operation and maintenance cost, improves the distribution network planning level, lowers power grid line loss, improves the distribution network dispatching management level and improves first-aid repair working efficiency.
Description
Technical field
The present invention relates to a kind of main website and coordinate the power distribution automation guard method realizing with distributed terminal.
Background technology
Shanghai City is the first city of China, 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, 11 of whole world ranks.GCP and per capita disposable income all occupy national each provinces and regions and municipality directly under the Central Government first place per capita.Shanghai is in the development key period of " industrial transformation " at present, puts forth effort to make that " four " center "-international economy centers, international financial center, International Trade Center, International shipping center, this just has higher requirement to whole city's power supply capacity level.
1210.41 square kilometres of Pudong New Area, Shanghai whole district areas, determine to have gone through development in more than 20 years since " Pudong's great development " key areas such as built Golden Bridge, the national development zone of Zhangjiang, Waigaoqiao Bonded Zone, Lujiazui Financial and Trade Zone for the Party Central Committee, State Council from nineteen ninety.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.As whole city's maximum, most active district, Pudong New District is comprising 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 to Huangpu River, north, to Huangpu River, to the east of Pudong South Road, reaches credit Hua Lu in the south, takes up an area approximately 10 square kilometres.Naturally extending of the rapid growth of this core area power load and distribution line, has unavoidably caused the problems such as blur boundary, crossing elimination, roundabout power supply, affects power supply reliability and line loss lean.
Represent the international Advanced Cities such as the Singapore, Tokyo, Hong Kong, Paris of world-class level although the historical power supply reliability of Pudong's core space, at home in higher level, is compared, gap is larger.2013, State Grid Corporation of China promulgated " distribution network planning designing technique directive/guide ", proposed large size city nucleus to be defined as A+ region, integrated with world-class level, realized power supply reliability higher than 99.999% developing goal.Therefore, no matter be the power supply service level in international metropolis's core city, or the developing goal of State Grid Corporation of China's technology directive/guide proposition, all Pudong's core space is proposed to higher power supply reliability requirement.
Aspect 10kV medium voltage distribution network grid structure, core space is compared Guo Wang company, Shanghai company Guidelines, belongs to lack of standardization, atypical phenomenon and mainly contains three kinds:
1, overhead wire segmentation capacity is bigger than normal, gets in touch with on the low side;
2, do not meet current techniques principle according to the III type power distribution station of old standard construction;
3, there is atypia wiring in overhead wire.
And by the international advanced metropolis of contrast distribution net work structure, as Tokyo, Singapore, Hong Kong, Paris etc., the deficiency that sums up the current rack existence of core space comprises:
1, to share rate higher at part transformer station interval;
2, on switchyard, level power supply, all from the different buses of same transformer station, belongs to secondary duplicate supply;
3, on most of looped network level power supply from same transformer station (switchyard, different buses, belong to secondary duplicate supply;
4, switchyard total number is on the low side, 10kV interval anxiety;
5, exist large looped network to overlap little ring network structure, power distribution automation is disposed and brought technical difficulty;
6, rack is laterally got in touch with weakness, and rack load transfer ability is limited.
For solving above-mentioned power distribution network rack aspect existing problems, core space need be strengthened 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 not implemented electrical power distribution automatization system at present; cannot realize by automation means the automation of visual, the network reconfiguration of three distantization, the distribution scheduling of distribution net equipment; and the intellectuality of distribution management, with world-class, even domestic advanced person's distance has a long way to go.If quick, not reliable electrical power distribution automatization system provides support, power supply reliability cannot meet the requirement of " distribution network planning designing technique directive/guide ".For further improving power supply reliability, realizing intelligentized distribution management is target, is necessary in target rack of core space application adaptation, electric network fault rapidly self-healing, simple, practical and reliable FEEDER AUTOMATION.
Aspect power distribution automation, there is following problem in Pudong's core space:
Power distribution automation application demand is not synchronously considered in Distribution Network Frame construction and upgrading, causes the automation dispersion of layouting, and can not form scale and benefit.
Due to distribution terminal and communicator problem, cause a large amount of invalid signals, have a strong impact on distribution scheduling monitoring.
The device such as distribution terminal, communication lacks specification and the technological means of standardization Installation and Debugging, Function detection.
It is larger that EPON communication is affected by external environmental factor, and the instantaneous interruption of communication frequently occurs.
Electrical power distribution automatization system O&M security system still needs further perfect.
Electrical power distribution automatization system O&M relates to multiple links such as scheduling, communication, fortune inspection, still exists O&M working 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 not clearly.Lack the complete cultivating system of comprehensive automation professional and technical personnel and excitation; Basis O&M personnel specialty quality and the profit reduction and reserving of business skill level are in the O&M operation of primary equipment, urgently promote, for the professional technique training deficiency of new technology, new equipment, O&M strength relies on outer committee strength substantially, can not adapt to the demand of electrical power distribution automatization system equipment operation maintenance for a long time.
Summary of the invention
The invention provides a kind of main website and coordinate the power distribution automation guard method realizing with distributed terminal; power supply reliability is high; failure recovery time is short; power failure range is little; transformation is low with operation and maintenance expenses, has promoted distribution planning level, has reduced grid line loss; improve distribution scheduling managerial skills, improved repairing operating efficiency.
In order to achieve the above object; the invention provides a kind of main website and coordinate the power distribution automation guard method realizing with distributed terminal; during for power distribution network generation single failure, carry out power distribution automation protection; this power distribution automation guard method realizes based on electrical power distribution automatization system; the distribution power automation terminal that this electrical power distribution automatization system comprises power distribution automation main website and this power distribution automation main website of some connections; described distribution power automation terminal is arranged in the terminal equipment in power distribution network, and this power distribution automation guard method comprises following steps:
The circuit breaker of step 2, distribution power automation terminal control power distribution network outlet disconnects, and realizes power-off;
The block switch at step 3, two ends, distribution power automation terminal open failure region, carries out Fault Isolation;
Circuit breaker, interconnection switch and the block switch closure of step 4, distribution power automation terminal control power distribution network outlet, turn the load in distribution network fault-free region, realizes the service restoration in fault-free district.
Described distribution power automation terminal connects block switch, interconnection switch and the circuit breaker in terminal equipment.
In step 1, change fault zone by power distribution automation main website and determine fault zone if distribution power automation terminal cannot correctly be determined, and continued the operation of execution step 2-step 4 by power distribution automation main website.
In step 3, if distribution power automation terminal cannot isolated fault region, change by power distribution automation main website isolated fault region, and continued the operation of execution step 4 by power distribution automation main website.
According to different failure conditions, circuit breaker, interconnection switch and the block switch of distribution power automation terminal or power distribution automation main website control power distribution network outlet is simultaneously closed, or the circuit breaker of control power distribution network outlet and interconnection switch are simultaneously closed, or the circuit breaker of control power distribution network outlet and block switch closure simultaneously.
Power supply reliability of the present invention is high, and failure recovery time is short, and power failure range is little, and transformation is low with operation and maintenance expenses, has promoted distribution planning level, has reduced grid line loss, has improved distribution scheduling managerial skills, has improved repairing operating efficiency.
Brief description of the drawings
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 flow chart of the present invention.
Embodiment
Following according to Fig. 1～Fig. 6, illustrate preferred embodiment of the present invention.
Fig. 1 is the block diagram of electrical power distribution automatization system, the distribution power automation terminal 12 that this electrical power distribution automatization system comprises power distribution automation main website 11 and this power distribution automation main website 11 of some connections, described distribution power automation terminal 12 is arranged in the terminal equipment in power distribution network, and this distribution power automation terminal 12 connects block switch, interconnection switch and the circuit breaker in terminal equipment.
A kind of main website provided by the invention coordinates the power distribution automation guard method realizing with distributed terminal, its power distribution automation main website and distribution power automation terminal based in electrical power distribution automatization system is realized.
According to four specific embodiments, power distribution automation guard method of the present invention is described below.
As shown in Figure 2, it is a kind of Distribution Network Frame wiring construction, in this Distribution Network Frame wiring construction, comprise some switchyards and transformer station, described switchyard comprises first paragraph bus and the second segment bus of connecting by block switch, every section of bus connects respectively one back into line, some line and interconnections of returning back out, two of this switchyard connects respectively different transformer stations 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 and first paragraph bus one side that is connected another switchyard that connect a switchyard second segment bus, the interconnection switch of connecting valve station second segment bus one side is for often driving stand-by heat switch, and the interconnection switch of first paragraph bus one side at connecting valve station is normally closed switch.
Optical-fiber longitudinal difference protection module is set on the inlet wire of described switchyard, in the time of circuit internal fault, can realizes quick-action completely, selectively, tripping faulty line fast, current transformer and circuit breaker that this optical-fiber longitudinal difference protection module comprises series connection.
Block switch on circuit breaker, switchyard on the inlet wire of described switchyard is connected respectively distribution power automation terminal with the interconnection switch on interconnection, and these some distribution power automation terminals connect power distribution automation main website.
Overcurrent, zero stream protection module and distribution power automation terminal are set in the outlet of described switchyard, and track section fault, after the isolated fault of distribution self-healing distribution terminal, recovers wiretap and interconnection switch and makes circuit restoring power supply in non-broken-down section.
Overcurrent, zero stream protection module and optical-fiber longitudinal difference protection module are set on the interconnection of described switchyard, in the time of interconnection internal fault, can realize quick-action completely, selectively, tripping faulty line fast.
Described distribution power automation terminal and power distribution automation main website have distant place switching control function, and the power supply that non-fault dead electricity section can switch to other paths by distribution power automation terminal and power distribution automation main website is powered.
As shown in Figure 1, in figure, show switchyard A, switchyard B and switchyard C, and transformer station 1, transformer station 2, the annexation of transformer station 3 and 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 the first paragraph bus 11 of switchyard A and the second segment bus of switchyard C, 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 the second segment bus 12 of switchyard A and the first paragraph bus of switchyard B, 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 the second segment bus of switchyard B and the first paragraph bus of switchyard C, 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 are set on described interconnection 101, interconnection switch QF15 is arranged on connecting valve station A second segment bus 12 1 sides, and for often driving stand-by heat switch, interconnection switch QF16 is arranged on connecting valve station B first paragraph bus one side; Interconnection switch QF19 and interconnection switch QF14 are set on described interconnection 101 ', and interconnection switch QF19 is arranged on connecting valve station C second segment bus one side, and for often driving stand-by heat switch, interconnection switch QF14 is arranged on connecting valve station A first paragraph bus one side; Described interconnection 101 ' ' on interconnection switch QF17 and interconnection switch QF18 are set, interconnection switch QF17 is arranged on connecting valve station B second segment bus one side, interconnection switch QF18 is arranged on connecting valve station C first paragraph bus one side.
As 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, current transformer and circuit breaker that this optical-fiber longitudinal difference protection module comprises series connection, the current transformer 102 that optical-fiber longitudinal difference protection module on the inlet wire JX1 of switchyard A comprises series connection and circuit breaker Q F1 and circuit breaker Q F2, the current transformer that optical-fiber longitudinal difference protection module on the inlet wire JX2 of switchyard A comprises series connection and circuit breaker Q F3 and circuit breaker Q F4, the current transformer that optical-fiber longitudinal difference protection module on inlet wire on the first paragraph bus of switchyard B comprises series connection and circuit breaker Q F5 and circuit breaker Q F6, the current transformer that optical-fiber longitudinal difference protection module on inlet wire on the second segment bus of switchyard B comprises series connection and circuit breaker Q F7 and circuit breaker Q F8, the current transformer that optical-fiber longitudinal difference protection module on inlet wire on the first paragraph bus of switchyard C comprises series connection and circuit breaker Q F10, current transformer and circuit breaker Q F9 that optical-fiber longitudinal difference protection module on inlet wire on switchyard C second segment bus comprises series connection.
As shown in Figure 1, three switchyards are single mother partition mode of connection, each switchyard has respectively two to return back out line back into line six, each switchyard two back into line from two different substation, between switchyard, be furnished with and between switchyard, get in touch with special line, when normal operation, three contact special line one end switch are running status, and other end switch is hot stand-by duty.
In the time that the inlet wire of switchyard breaks down, Distribution Network Frame wiring construction provided by the invention can be realized Fault Isolation and restore electricity, and is achieved as follows feed protection:
1, switchyard single failure pattern:
Switchyard two 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 to distribution power automation terminal in station; the block switch prepared auto restart action of switchyard; block switch closure; dead electricity bus is powered by block switch, and interconnection prepared auto restart is now as second level standby.
As shown in Figure 1, break down as example with the inlet wire JX1 of switchyard A, 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 tripping operation, and longitudinal difference protection trip signal is informed to distribution power automation terminal in station, distribution power automation terminal is received longitudinal difference protection trip signal, and by there being the judgement with no pressure of pressure, the closed block switch QF11 of protection action that autotomys, the first paragraph bussed supply of recovery switchyard A;
2, the single maintenance model of switchyard:
N-1 maintenance mode: the arbitrary incoming power maintenance of switchyard, power by this station block switch that closes, drop into interconnection prepared auto restart.
Single fault mode under N-1 maintenance mode: while supposing a certain section of bus incoming power maintenance in A station, arrange A station block switch closure, now there is A station inlet wire operation troubles, A station interconnection LL2 prepared auto restart will start, interconnection is often opened stand-by heat interconnection switch closure, and one section, station of B bus is by one, the two section of bus in contact tape A station.
As shown in Figure 3, be the second Distribution Network Frame wiring construction, in 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 be connected on two ring main unit and some box type transformers between power station, in this Single-ring network grid structure, also comprise an interconnection switch, this interconnection switch is arranged on box type transformer, for normal open switch, on each box type transformer and ring main unit, distribution power automation terminal is set, controls 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 respectively two groups of ring main units in Single-ring network grid structure, 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 is the specific embodiment circuit structure diagram of Distribution Network Frame wiring construction of the present invention, this Distribution Network Frame wiring construction is that Single-ring network three power supplys two main are for Connection Mode, power station is from switchyard, described switchyard comprises the first paragraph bus 12 and the second segment bus 13 that connect by block switch 11, on every section of bus, connect respectively one back into line and some lines that returns back out, the inlet wire 1 of switchyard is connected respectively different transformer stations with inlet wire 2.
Described Distribution Network Frame wiring construction comprises two groups of Single-ring network grid structures, two power stations of first group of Single-ring network grid structure are respectively the outlet 2 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, connect three box type transformers 102 and a ring main unit 103, arrange on one of them box type transformer and often open interconnection switch QS8; Two power stations of second group of Single-ring network grid structure are respectively the outlet 1 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, connect four box type transformers 102 and a ring main unit 103, arrange on one of them box type transformer and often open interconnection switch QS23; Between two groups of Single-ring network grid structures, interconnection 101 is set, connects respectively two groups of ring main units in Single-ring network grid structure, the on-load switch QS19 of these 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, circuit breaker Q F2 is set in outlet 2, in the outlet 1 of switchyard 2, circuit breaker Q F3 is set, circuit breaker Q F4 is set in outlet 2, a distribution power automation terminal is set in each outlet of switchyard, on each box type transformer and ring main unit, distribution power automation terminal is set, it controls the switch motion in box type transformer and ring main unit.
While breaking down in Distribution Network Frame wiring construction, the present invention can realize Fault Isolation and restore electricity, and realizes feed protection, and guard method comprises following steps:
The closure of step 3, distribution power automation terminal control electric power incoming line circuit breaker, interconnection switch and on-load switch, realizes the power supply in fault-free district.
According to different failure conditions, distribution power automation terminal control electric power incoming line circuit breaker, interconnection switch and on-load switch are simultaneously closed, or control electric power incoming line circuit breaker and interconnection switch are simultaneously closed, or control electric power incoming line circuit breaker and on-load switch closure simultaneously.
Embodiment 3
As shown in Figure 4, it is the third Distribution Network Frame wiring construction, for dual-ring network four power supply architectures, this Distribution Network Frame wiring construction comprises two switchyards (switchyard 1 and switchyard 2), and be connected on two distributor track web frames between two switchyards, every distributor track web frame comprises the ring main unit 102 between some outlets that are connected on switchyard, ring main unit 102 quantity that comprise in every distributor track web frame are consistent, article two, in distributor track web frame, between the ring main unit 102 of correspondence, interconnection is set, interannular interconnection switch 101 is set on interconnection, this interannular interconnection switch is normal open switch, in one of them ring main unit in every described 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 the second segment bus that connect by block switch, and first paragraph bus connects inlet wire and some outlets, and circuit breaker is set in outlet, and second segment bus connects inlet wire and some outlets, and circuit breaker is set in outlet.
On each ring main unit, distribution power automation terminal is set, control the switch motion in ring main unit, a distribution power automation terminal is set on the circuit breaker in the outlet of each switchyard and interannular interconnection switch, it controls the switch motion of circuit breaker and interannular interconnection switch, and described some distribution power automation terminals connect power distribution automation main website.
As shown in Figure 4, it is the specific embodiment circuit structure diagram of Distribution Network Frame wiring construction of the present invention, between switchyard 1 and switchyard 2, connect two distributor track web frames, four ring main units 102 of all connecting in every distributor track web frame, Article 1, the outlet at distributor track web frame connecting valve station 1 and the outlet of switchyard 2, circuit breaker Q F1 is set in the outlet of switchyard 1, circuit breaker Q F3 is set in the outlet of switchyard 2, this Article 1 distributor track web frame arranges interconnection switch QS6 in ring on a ring main unit therein, in this ring, interconnection switch QS6 is normal open switch, as the cut-off point of 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, circuit breaker Q F2 is set in the outlet of switchyard 1, circuit breaker Q F4 is set in the outlet of switchyard 2, this Article 1 distributor track web frame arranges interconnection switch QS14 in ring on a ring main unit therein, in this ring, interconnection switch QS14 is normal open switch, as the cut-off point of 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 circuits and a ring main unit.In every distributor track web frame, between the ring main unit of correspondence, interannular interconnection switch is all set, is respectively interannular interconnection switch QS17, interannular interconnection switch QS18, interannular interconnection switch QS19 and interannular interconnection switch QS20.
While breaking down in Distribution Network Frame wiring construction, the present invention can realize Fault Isolation and restore electricity, and realizes feed protection, and guard method comprises following steps:
Step 3, by interconnection switch and interannular interconnection switch closure in distribution power automation terminal control electric power incoming line circuit breaker, ring, realize the power supply in fault-free district.
According to different failure conditions, in distribution power automation terminal control electric power incoming line circuit breaker, ring, interconnection switch and interannular interconnection switch are simultaneously closed, or it is simultaneously closed to control the interior interconnection switch of electric power incoming line circuit breaker and ring, or control electric power incoming line circuit breaker and interannular interconnection switch closure simultaneously.
Embodiment 4
As shown in Figure 5, 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, form four segmentations three and get in touch with structure, in each backbone segmentation, some block switches are set, this block switch is normally closed switch, in each backbone contact section, an interconnection switch is set, this interconnection switch is normal open switch.
This Distribution Network Frame wiring construction also comprises the some transformer stations that connect described overhead transmission line backbone, in the outlet of each transformer station, circuit breaker is set, and fast tripping protection device is set on this circuit breaker.
On this overhead transmission line backbone, connect some overhead transmission line branch lines, on each overhead transmission line branch line, branch line circuit breaker is set.
On described overhead transmission line branch line, connect some box type transformers, pole type transformer and individual line subscriber.
On described each block switch, interconnection switch, circuit breaker and branch line circuit breaker, distribution power automation terminal is set, described some distribution power automation terminals connect power distribution automation main website.
As shown in Figure 5, specific embodiments of the invention circuit diagrams, this overhead transmission line backbone 11 has four backbone segmentations and three backbone contact sections, the first segmentation of backbone, the second segmentation, the 3rd segmentation, the 4th segmentation and one of them backbone interconnection are " work " font and distribute, the first segmentation of overhead transmission line backbone is connected transformer station 1 with one end of the 3rd segmentation, one end of the second segmentation connects transformer station 2, one end of the 4th segmentation connects transformer station 3, circuit breaker 101 is set in the outlet of transformer station, the first segmentation of backbone and the 3rd segmentation are as backbone contact section, the first segmentation of backbone, the second segmentation, the 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 circuit breaker 104 is set, on overhead transmission line branch line 12, connect some box type transformers 106, pole type transformer 105 and individual line subscriber 107.
While breaking down in Distribution Network Frame wiring construction, the present invention can realize Fault Isolation and restore electricity, and realizes feed protection.
In the time that structure generation backbone fault is got in touch with in overhead transmission line four segmentations three, described overhead transmission line four segmentations three are got in touch with structure feeder line automatic protecting method and are comprised following steps:
Step 1.1, the distribution power automation terminal connecting 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;
Fast tripping protection device on transformer station's wire-outgoing breaker of step 1.2, distribution power automation terminal control connection 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 is successful, and overhead transmission line restores electricity;
If permanent fault, transformer station's wire-outgoing breaker post reclosing acceleration tripping operation disconnects, and carry out step 1.4;
The block switch tripping operation of step 1.4, distribution power automation terminal control fault section two ends disconnects, isolated fault;
Step 1.5, distribution power automation terminal control interconnection switch closure, make restoring power supply in non-broken-down section;
In the time that structure generation main split fault is got in touch with in overhead transmission line four segmentations three, described overhead transmission line four segmentations three are got in touch with structure feeder line automatic protecting method and are comprised following steps:
Step 2.1, the distribution power automation terminal connecting on the branch line circuit breaker on transformer station's wire-outgoing breaker of fault section and the block switch at fault section two ends and fault section branch line detect fault current, distribution power automation terminal starts, and determines fault section;
Fast tripping protection device on transformer station's wire-outgoing breaker of step 2.2, distribution power automation terminal control connection fault section carries out fast tripping protection action, tripping operation disconnects, and the branch line circuit breaker trip on the branch line of distribution power automation terminal control connection fault section disconnects;
Step 2.3, transformer station's wire-outgoing breaker reclosing.
In above-mentioned four embodiment, the hardware of realizing of power distribution automation protection is distribution power automation terminal, if distribution power automation terminal breaks down, power distribution automation protection can be completed by power distribution automation main website.
As shown in Figure 6, be flow chart of the present invention, main website provided by the invention coordinates the power distribution automation guard method realizing with distributed terminal, during for power distribution network generation single failure, carry out power distribution automation protection, and the method includes the steps of:
The circuit breaker of step 2, distribution power automation terminal control power distribution network outlet disconnects, and realizes power-off;
The block switch at step 3, two ends, distribution power automation terminal open failure region, carries out Fault Isolation;
Circuit breaker, interconnection switch and the block switch closure of step 4, distribution power automation terminal control power distribution network outlet, turn the load in distribution network fault-free region, realizes the service restoration in fault-free district.
In step 1, change fault zone by power distribution automation main website and determine fault zone if distribution power automation terminal cannot correctly be determined, and continued the operation of execution step 2-step 4 by power distribution automation main website.
In step 3, if distribution power automation terminal cannot isolated fault region, change by power distribution automation main website isolated fault region, and continued the operation of execution step 4 by power distribution automation main website.
According to different failure conditions, circuit breaker, interconnection switch and the block switch of distribution power automation terminal or power distribution automation main website control power distribution network outlet is simultaneously closed, or the circuit breaker of control power distribution network outlet and interconnection switch are simultaneously closed, or the circuit breaker of control power distribution network outlet and block switch closure simultaneously.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.Read after foregoing those skilled in the art, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (5)
1. a main website coordinates the power distribution automation guard method realizing with distributed terminal; during for power distribution network generation single failure, carry out power distribution automation protection; it is characterized in that; this power distribution automation guard method realizes based on electrical power distribution automatization system; the distribution power automation terminal that this electrical power distribution automatization system comprises power distribution automation main website and this power distribution automation main website of some connections; described distribution power automation terminal is arranged in the terminal equipment in power distribution network, and this power distribution automation guard method comprises following steps:
Step 1, in the time of power distribution network generation single failure, distribution power automation terminal is determined fault zone;
The circuit breaker of step 2, distribution power automation terminal control power distribution network outlet disconnects, and realizes power-off;
The block switch at step 3, two ends, distribution power automation terminal open failure region, carries out Fault Isolation;
Circuit breaker, interconnection switch and the block switch closure of step 4, distribution power automation terminal control power distribution network outlet, turn the load in distribution network fault-free region, realizes the service restoration in fault-free district.
2. main website as claimed in claim 1 coordinates the power distribution automation guard method realizing with distributed terminal, it is characterized in that, described distribution power automation terminal connects block switch, interconnection switch and the circuit breaker in terminal equipment.
3. main website as claimed in claim 1 or 2 coordinates the power distribution automation guard method realizing with distributed terminal; it is characterized in that; in step 1; if distribution power automation terminal cannot correctly be determined fault zone; change by power distribution automation main website and determine fault zone, and continued the operation of execution step 2-step 4 by power distribution automation main website.
4. main website as claimed in claim 3 coordinates the power distribution automation guard method realizing with distributed terminal; it is characterized in that; in step 3; if distribution power automation terminal cannot isolated fault region; change by power distribution automation main website isolated fault region, and continued the operation of execution step 4 by power distribution automation main website.
5. main website as claimed in claim 4 coordinates the power distribution automation guard method realizing with distributed terminal; it is characterized in that; according to different failure conditions; circuit breaker, interconnection switch and the block switch of distribution power automation terminal or power distribution automation main website control power distribution network outlet is simultaneously closed; or the circuit breaker of control power distribution network outlet and interconnection switch are simultaneously closed, or the circuit breaker of control power distribution network outlet and block switch closure simultaneously.
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| CN109193552A (en) * | 2018-09-06 | 2019-01-11 | 深圳供电局有限公司 | Intelligent distributed protection self-healing control system and configuration method |
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| CN113810796A (en) * | 2021-08-02 | 2021-12-17 | 国网浙江宁波市鄞州区供电有限公司 | Novel network networking architecture of power distribution network and planning method thereof |
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