CN104882883A - 10 KV power distribution network system - Google Patents
10 KV power distribution network system Download PDFInfo
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- CN104882883A CN104882883A CN201510370273.XA CN201510370273A CN104882883A CN 104882883 A CN104882883 A CN 104882883A CN 201510370273 A CN201510370273 A CN 201510370273A CN 104882883 A CN104882883 A CN 104882883A
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Abstract
The invention discloses a 10 KV power distribution network system. The 10 KV power distribution network system comprises a 10KV voltage power distribution line, a transformer station, a switch station, a distribution room and control protection equipment, wherein the 10KV voltage distribution line is connected through a power distribution network frame, the power distribution network frame comprises an aerial network frame and a cable network frame, the aerial network frame is any one kind or both kinds of a multi-subsection single link structure and a multi-subsection proper link structure, and the cable network frame is any one kind or multiple kinds of a single-ring type structure, a double-ring type structure, a multi-branch multi-link structure and a N-supply and one-backup structure; the transformer station is used for transforming transmission voltage of a power network into power distribution voltage, and the power distribution voltage is output through the 10KV voltage power distribution line; the switch station is used for distributing the 10KV voltage power distribution line; the distribution room is used for transforming 10 KV voltage into utilization voltage; the control protection equipment is used for detecting a fault of the 10 KV power distribution network system or protecting the 10 KV power distribution network system when the fault occurs. The 10 KV power distribution network system solves the technical problem that the power supply reliability of the 10 KV power distribution network system in the prior art is low.
Description
Technical field
The present invention relates to distribution technique field, in particular to a kind of 10KV distribution network system.
Background technology
Electric power system is made up of five links such as generating, power transformation, transmission of electricity, distribution and electricity consumptions.In electric power system, various types of, a large amount of electric equipments is closely bound up by electric wiring.These five links of generating, power transformation, transmission of electricity, distribution and electricity consumption are all linked with one another, balance constantly, indispensable, any one in electric power system has an accident, and all likely produces significant impact to the operation of electric power system.
10KV distribution network system is a part for electric power system.It can safely, stable, reliably run, be not only directly connected to the unimpeded of business electrical, and relate to electric power system and can run normally.But the delayed contradiction of power network development that long term accumulation is formed still is given prominence to, electric network composition is also comparatively weak, especially ultra high voltage and power distribution network " two is weak " comparatively outstanding.In the primary stage of power grid construction, low and medium voltage distribution network follows user's request construction substantially, affect comparatively large by investor, the grid structure in its distribution network system and distribution network system lacks appropriate design, and then causes 10KV distribution network reliability low.
For above-mentioned problem, at present effective solution is not yet proposed.
Summary of the invention
Embodiments provide a kind of 10KV distribution network system, at least to solve the technical problem that in prior art, 10KV distribution network system power supply reliability is low.
According to an aspect of the embodiment of the present invention, provide a kind of 10KV distribution network system, comprise: 10KV voltage distribution circuit, connected by distribution network structure, wherein, distribution network structure comprises built on stilts net rack and cable system rack, built on stilts net rack be following any one or various structures: many segmentations simply connected network structure and many segmentations appropriateness contact structure, and cable system rack be any one or various structures as follows: the multi-joint network structure of monocyclic structure, dicyclic structure, multiple-limb and N supply one for structure; Transformer station, for transferring the transmission voltage of electrical network to distribution voltage, and is exported by 10KV voltage distribution circuit; Switchyard, for distributing 10KV voltage distribution circuit, wherein, the 10KV voltage distribution circuit distributed through switchyard introduces switchgear house; Switchgear house, is provided with transformer, 10KV switch cubicle in switchgear house, for being utilization voltage by 10KV voltage transitions; Control protection equipment, for detecting 10KV distribution network system fault, or protects 10KV distribution network system when fault occurs.
Further, when built on stilts net rack comprises many segmentations simply connected network structure, built on stilts netting twine road is divided into three sections by on-load switch, and two overhead transmission lines coming from different substation are got in touch with.
Further, when built on stilts net rack comprises many segmentations appropriateness contact structure, built on stilts netting twine road is divided into three sections by on-load switch, every section of circuit with come from another circuit of same transformer station or or get in touch with the circuit coming from other transformer stations.
Further, when cable system rack comprises monocyclic structure, the middle pressure bus coming from different substation or the different middle pressure bus coming from same transformer station or come from the middle pressure bus of different switchyard or come from the single back line of pressing bus to feed out respectively in the difference of same switchyard and form Single-ring network.
Further, when cable system rack comprises dicyclic structure, the different middle pressure bus coming from same transformer station or the middle pressure bus coming from different substation respectively feed out a loop line road, become a partner with path and lay, from come from the different middle pressure bus of another transformer station or come from different substation a loop line road of pressing bus respectively to feed out and get in touch with respectively, form dual-ring network.
Further, when cable system rack comprises the multi-joint network structure of multiple-limb, namely carry out branch after the middle pressure bus coming from transformer station feeds out circuit, a point number is 2 or 3.
Further, when cable system rack comprises N confession one for structure, come from the difference of same transformer station in the difference of pressing bus or coming from same switchyard the middle pressure bus of pressing bus or come from different substation or the middle pressure bus coming from different switchyard draws supply line, the extension wire of drawing with another transformer station or another switchyard, jointly be connected to ring-main unit or switchyard, open loop operation.
Further, when cable system rack comprises multiple monocyclic structure, between two groups of Single-ring network grid structures, interconnection is set, this distribution network structure wiring construction is that Single-ring network three power supply two main is for Connection Mode, Single-ring network grid structure comprises two power stations, transformer series is between these two power stations, and interconnection switch is interconnection switch open in usual, is arranged on transformer.
Further, when load density is 1 ~ 5MW/km2, built on stilts net rack comprises: many segmentations simply connected network structure; When load density is 5 ~ 10MW/km2, built on stilts net rack comprises: many segmentation appropriateness contact structures, and cable system rack comprises following any one or various structures: the multi-joint network structure of monocyclic structure, multiple-limb and N for one for structure; When load density is 10 ~ 30MW/km2, cable system rack comprises: dicyclic structure.
Further, when built on stilts net rack comprises: during many segmentations simply connected network structure, segments in built on stilts net rack circuit is 3 to 5, connectivity number is 1, radius of electricity supply is no more than 2 kms, on-load switch selected by block switch, interconnection switch, and in distribution automation planning region, interconnection switch, the block switch of every bar circuit configure remote sensing module, remote signal module and remote control module; When built on stilts net rack comprises: during many segmentation appropriateness contact structures, segments in built on stilts net rack circuit is 3 to 5, connectivity number is 2 to 3, radius of electricity supply is no more than 2 kms, on-load switch selected by block switch, interconnection switch, in distribution automation planning region, interconnection switch, the block switch of every bar circuit configure remote sensing module, remote signal module and remote control module.
Further, when cable system rack comprises monocyclic structure, the segments of monocyclic structure is no more than 6, connectivity number is 1, radius of electricity supply is no more than 2 kms, and ring main unit selected by block switch, interconnection switch, in distribution automation planning region, tie switches allocation three is distant, chooses suitable segmented configuration remote sensing module, remote signal module and remote control module; When cable system rack comprises dicyclic structure, the segments of dicyclic structure is no more than 6, connectivity number is 1, radius of electricity supply is no more than 2 kms, ring main unit selected by block switch, interconnection switch, in distribution automation planning region, tie switches allocation three is distant, chooses suitable segmented configuration remote sensing module, remote signal module and remote control module; When cable system rack comprises N confession one for structure, N confession one is no more than 6 for the segments of structure, connectivity number is no more than 3, radius of electricity supply is no more than 2 kms, ring main unit selected by block switch, interconnection switch, in distribution automation planning region, tie switches allocation three is distant, chooses suitable segmented configuration remote sensing module, remote signal module and remote control module; When cable system rack comprises the multi-joint network structure of multiple-limb, the segments of the multi-joint network structure of multiple-limb is no more than 6, connectivity number is no more than 3, radius of electricity supply is no more than 2 kms, ring main unit selected by block switch, interconnection switch, in distribution automation planning region, tie switches allocation three is distant, chooses suitable segmented configuration remote sensing module, remote signal module and remote control module.
Further, Control protection equipment at least comprise following any one: circuit breaker, relay protector, voltage transformer, current transformer.
In embodiments of the present invention, adopt 10KV voltage distribution circuit, connected by distribution network structure, wherein, distribution network structure comprises built on stilts net rack and cable system rack, built on stilts net rack be following any one or various structures: many segmentations simply connected network structure and many segmentations appropriateness contact structure, and cable system rack be any one or various structures as follows: the multi-joint network structure of monocyclic structure, dicyclic structure, multiple-limb and N supply one for structure; Transformer station, for transferring the transmission voltage of electrical network to distribution voltage, and is exported by 10KV voltage distribution circuit; Switchyard, for distributing 10KV voltage distribution circuit, wherein, the 10KV voltage distribution circuit distributed through switchyard introduces switchgear house; Switchgear house, is provided with transformer, 10KV switch cubicle in switchgear house, for being utilization voltage by 10KV voltage transitions; Control protection equipment; for detecting 10KV distribution network system fault; or the mode of 10KV distribution network system is protected when fault occurs; reach the object of appropriate design 10KV distribution network system; thus achieve the technique effect improving 10KV distribution network system power supply reliability, and then solve the technical problem that in prior art, 10KV distribution network system power supply reliability is low.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of a kind of optional 10KV distribution network system according to the embodiment of the present invention;
Fig. 2 is the winding diagram of many segmentations simply connected network structure according to the built on stilts net rack of the embodiment of the present invention;
Fig. 3 be according to the built on stilts net rack of the embodiment of the present invention be many segmentations appropriateness contact structure winding diagram;
Fig. 4 is the winding diagram of monocyclic structure according to the cable system rack of the embodiment of the present invention;
Fig. 5 is the winding diagram of dicyclic structure according to the cable system rack of the embodiment of the present invention;
Fig. 6 is the winding diagram of the multi-joint network structure of multiple-limb according to the cable system rack of the embodiment of the present invention; And
Fig. 7 be according to the cable system rack of the embodiment of the present invention be many segmentations appropriateness contact structure winding diagram.
Embodiment
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in specification of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Also it should be noted that, distribution network shelf structure refers to be fed out by power supply point, be made up of according to certain mode of connection elements such as circuit, switch, distribution transformings, there is mutual communication relationship, can the power distribution network wiring construction of electricity distribution.
Also it should be noted that, in embodiments of the present invention, underload density refers to that load density is at 1000 ~ 5000kW/km
2between, middle load density refers to that load density is at 5000 ~ 10000kW/km
2between, high load capacity density refers to that load density is at 10000 ~ 30000kW/km
2between.
According to the embodiment of the present invention, provide a kind of 10KV distribution network system, Fig. 1 is the structural representation of a kind of optional 10KV distribution network system according to the embodiment of the present invention, and as shown in Figure 1, this system comprises:
10KV voltage distribution circuit, connected by distribution network structure, wherein, distribution network structure comprises built on stilts net rack and cable system rack, built on stilts net rack be following any one or various structures: many segmentations simply connected network structure and many segmentations appropriateness contact structure, and cable system rack be any one or various structures as follows: the multi-joint network structure of monocyclic structure, dicyclic structure, multiple-limb and N supply one for structure;
Transformer station, for transferring the transmission voltage of electrical network to distribution voltage, and is exported by 10KV voltage distribution circuit;
Switchyard, for distributing 10KV voltage distribution circuit, wherein, the 10KV voltage distribution circuit distributed through switchyard introduces switchgear house;
Switchgear house, is provided with transformer, 10KV switch cubicle in switchgear house, for being utilization voltage by 10KV voltage transitions;
Control protection equipment, for detecting 10KV distribution network system fault, or protects 10KV distribution network system when fault occurs.
Alternatively, when built on stilts net rack comprises many segmentations simply connected network structure, built on stilts netting twine road is divided into three sections by on-load switch, and two overhead transmission lines coming from different substation are got in touch with.
Concrete, Fig. 2 is the winding diagram of many segmentations simply connected network structure according to the built on stilts net rack of the embodiment of the present invention, as shown in Figure 2, circuit is generally according to connect load quantity, capacity, adopt on-pole switch that circuit is divided into 3 sections, and two being come from the overhead transmission line handle contact of different substation, open loop operation, line of comparatively drawing money on credit can be installed in addition with block switch at its first section.
As from the foregoing, for the overhead distribution in underload density area, the mode of connection of many segmentations, simply connected network (different station) can be taked, open loop operation.The character of sight path load, capacity, number of users and line length, be generally divided into 3 sections by circuit, suitably can increase number of fragments if desired, and the maximum load rate of whole piece circuit and segmentation should leave necessary nargin, to realize the load transfer under fault or maintenance.
Alternatively, when cable system rack comprises multiple monocyclic structure, between two groups of Single-ring network grid structures, interconnection is set, this distribution network structure wiring construction is that Single-ring network three power supply two main is for Connection Mode, Single-ring network grid structure comprises two power stations, transformer series is between these two power stations, and interconnection switch is interconnection switch open in usual, is arranged on transformer.
Alternatively, when built on stilts net rack comprises: during many segmentations simply connected network structure, segments in built on stilts net rack circuit is 3 to 5, connectivity number is 1, radius of electricity supply is no more than 2 kms, on-load switch selected by block switch, interconnection switch, and in distribution automation planning region, interconnection switch, the block switch of every bar circuit configure remote sensing module, remote signal module and remote control module.Preferably, many segmentations simply connected network structure is applicable to load density is 1 ~ 5MW/km
2area.
Alternatively, when built on stilts net rack comprises many segmentations appropriateness contact structure, built on stilts netting twine road is divided into three sections by on-load switch, every section of circuit with come from another circuit of same transformer station or or get in touch with the circuit coming from other transformer stations.
Concrete, Fig. 3 be according to the built on stilts net rack of the embodiment of the present invention be many segmentations appropriateness contact structure winding diagram, as shown in Figure 3, circuit is generally according to connect load quantity, capacity, adopt on-pole switch that circuit is divided into 3 sections, every section of circuit and this transformer station All other routes or arrange 1 place with other substation line and get in touch with, open loop operation, line of comparatively drawing money on credit can be installed in addition with block switch at its first section.Further, in actual applications, in suitable segmented configuration automation to reduce investment outlay.
As from the foregoing, for the overhead distribution in middle load density area, can take many segmentations, the mode of connection that many (appropriateness) is got in touch with, open loop operation, is beneficial to flexible operation and plays equipment investment benefit, is generally advisable with three segmentations, three contacts.Each segmentation should establish 1 place to get in touch with All other routes, with other with to stand or different station track road is got in touch with, suitably can increase number of fragments if desired.For longer branch line, block switch can be installed in addition with at its first section.To the circuit implementing power distribution automation, segmentation and the contact of circuit suitably can be increased.
Alternatively, when built on stilts net rack comprises: during many segmentation appropriateness contact structures, segments in built on stilts net rack circuit is 3 to 5, connectivity number is 2 to 3, radius of electricity supply is no more than 2 kms, on-load switch selected by block switch, interconnection switch, and in distribution automation planning region, interconnection switch, the block switch of every bar circuit configure remote sensing module, remote signal module and remote control module.Preferably, many segmentation appropriateness contact structures are applicable to load density is 5 ~ 10MW/km
2area.
Alternatively, when cable system rack comprises monocyclic structure, the middle pressure bus coming from different substation or the different middle pressure bus coming from same transformer station or come from the middle pressure bus of different switchyard or come from the single back line of pressing bus to feed out respectively in the difference of same switchyard and form Single-ring network.
Concrete, Fig. 4 is the winding diagram of monocyclic structure according to the cable system rack of the embodiment of the present invention, as shown in Figure 4, the single back line of pressing the middle pressure bus (or pressing bus in the difference of a switchyard) of bus (or pressing bus in the difference of a transformer station) or two switchyards to feed out respectively in Liang Zuo transformer station forms Single-ring network, middle part open loop operation.
As from the foregoing, Small And Medium Capacity insignificant load that is regional for middle load density and cable region can take the mode of connection of Single-ring network, the mode that different station should be taked to get in touch with of having ready conditions, open loop operation.The number of users that connects should be determined according to combined factors such as load character, user capacity and power supply reliability requirements, and line mains maximum load rate generally should control below 50%, to realize the load transfer under relevant interconnector fault or maintenance.
Alternatively, when cable system rack comprises monocyclic structure, the segments of monocyclic structure is no more than 6, connectivity number is 1, radius of electricity supply is no more than 2 kms, and ring main unit selected by block switch, interconnection switch, in distribution automation planning region, tie switches allocation three is distant, chooses suitable segmented configuration remote sensing module, remote signal module and remote control module.Preferably, monocyclic structure is applicable to load density is 5 ~ 10MW/km
2area.
Alternatively, when cable system rack comprises dicyclic structure, the different middle pressure bus coming from same transformer station or the middle pressure bus coming from different substation respectively feed out a loop line road, become a partner with path and lay, from come from the different middle pressure bus of another transformer station or come from different substation a loop line road of pressing bus respectively to feed out and get in touch with respectively, form dual-ring network.
Concrete, Fig. 5 is the winding diagram of dicyclic structure according to the cable system rack of the embodiment of the present invention, as shown in Figure 5, in transformer station's difference, press bus (or middle pressure bus of Liang Zuo transformer station) respectively to feed out a loop line road, general becoming a partner with path is laid, the loop line road that middle pressure bus different from another transformer station (or middle pressure bus of Liang Zuo transformer station) respectively feeds out is got in touch with respectively, forms dual-ring network.The ring-main unit that serial connection and cross-section of cable capacity match or switchyard, middle part open loop operation.Dual-ring network also can be formed by the development of dijection circuit, is conducive to providing duplicate supply to user.Further, every switchgear house adopt T joint respectively T connect twice different cables in three loops, a main confession, a backheat is for subsequent use, and normal load factor when running is 40% (N-1-1).
As from the foregoing, in midtown, high load capacity density area, for meeting the power demands of important load, the mode of connection of dual-ring network can be taked.Initial stage according to important load demand, scale of investment, regional economic development, can build cable dijection circuit, is transitioned into dual-ring network according to necessary and feasible.The number of users that connects should be determined according to combined factors such as load character, load capacity and power supply reliability requirements, and line mains maximum load rate should control below 50%, to realize the load transfer under fault or maintenance.
Alternatively, when cable system rack comprises dicyclic structure, the segments of dicyclic structure is no more than 6, connectivity number is 1, radius of electricity supply is no more than 2 kms, and ring main unit selected by block switch, interconnection switch, in distribution automation planning region, tie switches allocation three is distant, chooses suitable segmented configuration remote sensing module, remote signal module and remote control module.Preferably, dicyclic structure is applicable to load density is 10 ~ 30MW/km
2area.
Alternatively, when cable system rack comprises the multi-joint network structure of multiple-limb, namely carry out branch after the middle pressure bus coming from transformer station feeds out circuit, a point number is 2 or 3.
Concrete, Fig. 6 is the winding diagram of the multi-joint network structure of multiple-limb according to the cable system rack of the embodiment of the present invention, as shown in Figure 6, namely branch is carried out after generally pressing bus to feed out circuit in transformer station, two branches or three branches can be set as required, decrease branch line section number of users relative to Single-ring network, be conducive to failure judgement section, shorten the interruption duration of non-faulting section; Be conducive to by trunk, branch's reasonable disposition cross-section of cable; Be conducive to improving transformer station's outgoing line interval load factor.
As from the foregoing, load is separated laying by ring-main unit after referring to cable departures by the multi-joint network mode of connection of multiple-limb, gets in touch with respectively with other substation line, to improve load transfer success rate, improves outgoing line interval load factor.This mode of connection is the extension of the Single-ring network mode of connection, be also applicable to middle load density area, can effectively improve line mains maximum load rate limit value (two branches two contact be 67%; The contact of three branches three is 75%).
Alternatively, when cable system rack comprises the multi-joint network structure of multiple-limb, the segments of the multi-joint network structure of multiple-limb is no more than 6, connectivity number is no more than 3, radius of electricity supply is no more than 2 kms, and ring main unit selected by block switch, interconnection switch, in distribution automation planning region, tie switches allocation three is distant, chooses suitable segmented configuration remote sensing module, remote signal module and remote control module.Preferably, the multi-joint network structure of multiple-limb is applicable to load density is 5 ~ 10MW/km
2area.
Alternatively, when cable system rack comprises N confession one for structure, come from the difference of same transformer station in the difference of pressing bus or coming from same switchyard the middle pressure bus of pressing bus or come from different substation or the middle pressure bus coming from different switchyard draws supply line, the extension wire of drawing with another transformer station or another switchyard, jointly be connected to ring-main unit or switchyard, open loop operation.
Concrete, Fig. 7 be according to the cable system rack of the embodiment of the present invention be many segmentations appropriateness contact structure winding diagram, as shown in Figure 7, in the difference of transformer station's (switchyard), press the middle pressure bus of bus or Liang Zuo transformer station (switchyard) to draw supply line, the extension wire of drawing with another transformer station (switchyard), is connected to ring-main unit or switchyard, open loop operation jointly, supply line can full-load run, can improve line load rate.As required, load can be connected in series in the middle part of supply line.
As from the foregoing, N supplies one for structure s, refer to that N bar cable line is as supply line, other 1 circuit is as public extension wire, form cable ring-system to run, supply line can full-load run, if certain 1 supply line breaks down, then can be put into operation by extension wire by switching, its rate of comprehensive utilization of equipment is
this mode of connection is applicable to middle load density area, larger capacity user concentrated area, builds extension wire and also can be used as the modification measures improving present situation rack, is used for alleviating supply line's heavy duty, and increases the power supply of different directions.
Alternatively, when cable system rack comprises N confession one for structure, N confession one is no more than 6 for the segments of structure, connectivity number is no more than 3, radius of electricity supply is no more than 2 kms, and ring main unit selected by block switch, interconnection switch, in distribution automation planning region, tie switches allocation three is distant, chooses suitable segmented configuration remote sensing module, remote signal module and remote control module; Preferably, N is applicable to load density for one for structure is 5 ~ 10MW/km
2area.
It should be noted that, in various grid structure, the reliability that in built on stilts net, many segmentations many (appropriateness) are got in touch with is higher, and in cable system, the reliability of dual-ring network is higher herein; The reliability magnitude relationship of several grid structure in different load density area is substantially constant, but reliability difference between the larger single site network shelf structure of load density is less.
Also it should be noted that, run a little more than N-1 load factor within some load peak time period, reliability has small size reduction herein.Under the prerequisite substantially meeting reliability requirement, each grid structure all also exists load factor equilibrium point, and when line load rate reaches load factor equilibrium point, utilization rate of equipment and installations gets a promotion, and the economic benefit of power distribution network is improved.
Concrete, the interconnection switch of (indistinct net) and main block switch in built on stilts net grid structure, generally by realizing remote control, remote measurement, remote signaling function be configured, other block switches and branch switch can configure remote signalling and telemetry function as required.Automatic fault isolation device can be installed by the multiple track arm of fault and the multiple user demarcation place of fault.
Concrete, the multi-joint network wiring of cable Single-ring network, multiple-limb, dual-ring network and N confession one are generally configured by remote control, remote measurement, remote signaling function for the contact open loop point of the mode of connection; Dual-ring network contain responsible consumer related switch node can by realizing remote control, remote measurement, remote signaling function be configured; The breakout of the multi-joint network mode of connection of multiple-limb also can be configured by remote control, remote measurement, remote signaling function; When Single-ring network, the multiple-limb multi-joint network mode of connection serial connection user more time, can appropriate intervals configuration remote control, remote measurement, remote signaling function.Further, other switch nodes can configure remote signalling and telemetry function as required, and cable dijection circuit node can configure by dual-ring network automation development, and correlation line switching node can be configured by remote signalling, telemetry function.
Further, by cooperatively interacting of segmentation and contact, can restore electricity rapidly when fault.Consider reliability and economy, the contact of many segmentation appropriateness is better than many segmentations simply connected network, and especially compared with simply connected network, multi-joint network obviously can be reduced to feeder line layer and the additional cost needed for transformer layer emergency duty.But contacted many time, accident transfer needs complicated handover operation, if must be manual operation, the maximum connectivity number of recommendation is 3 ~ 4, if control far away or automatic operation, maximum connectivity number can reach more than 6, but every section of circuit is no more than 1 contact.Equitable subsection can improve electric network reliability, and when segments is less, the reliability that increase segments brings improves obvious; After segments reaches some, due to the increase of block switch failure rate, the raising of segments to reliability is not obvious, even can decrease, and the overhead wire segments of recommendation is 3 ~ 5.
Alternatively, Control protection equipment at least comprise following any one: circuit breaker, relay protector, voltage transformer, current transformer.
According to the distribution network system of the embodiment of the present invention, wiring normative and reasonable, flexible operation, possess sufficient power supply capacity, stronger load transfer ability and have certain enabling capabilities to higher level's electrical network; Relaying configuration, Protective levels are rationally reliable; Be convenient to implement power distribution automation, and effectively can take precautions against the chain expansion of fault; Meet corresponding power supply reliability requirement, coordinate mutually with social environment, it is reasonable to build with operating cost.
In the above embodiment of the present invention, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiments that the application provides, should be understood that, disclosed technology contents, the mode by other realizes.Wherein, device embodiment described above is only schematic, the such as division of described unit, can be that a kind of logic function divides, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of unit or module or communication connection can be electrical or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple unit.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises all or part of step of some instructions in order to make a computer equipment (can be personal computer, server or the network equipment etc.) perform method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, read-only memory (ROM, Read-OnlyMemory), random access memory (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. various can be program code stored medium.
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 principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. a 10KV distribution network system, is characterized in that, comprises
10KV voltage distribution circuit, connected by distribution network structure, wherein, described distribution network structure comprises built on stilts net rack and cable system rack, described built on stilts net rack is following any one or various structures: many segmentations simply connected network structure and many segmentations appropriateness contact structure, and described cable system rack be following any one or various structures: the multi-joint network structure of monocyclic structure, dicyclic structure, multiple-limb and N supply one for structure;
Transformer station, for transferring the transmission voltage of electrical network to distribution voltage, and is exported by described 10KV voltage distribution circuit;
Switchyard, for distributing described 10KV voltage distribution circuit, wherein, the described 10KV voltage distribution circuit distributed through described switchyard introduces switchgear house;
Described switchgear house, is provided with transformer, 10KV switch cubicle in described switchgear house, for being utilization voltage by 10KV voltage transitions;
Control protection equipment, for detecting described 10KV distribution network system fault, or protects described 10KV distribution network system when fault occurs.
2. system according to claim 1, is characterized in that, when described built on stilts net rack comprises many segmentations simply connected network structure, overhead transmission line is divided into three sections by on-load switch, and two overhead transmission lines coming from different substation are got in touch with.
3. system according to claim 1, it is characterized in that, when described built on stilts net rack comprises many segmentations appropriateness contact structure, overhead transmission line is divided into three sections by on-load switch, every section of circuit with come from another circuit of same transformer station or or get in touch with the circuit coming from other transformer stations.
4. system according to claim 1, it is characterized in that, when described cable system rack comprises monocyclic structure, the middle pressure bus coming from different substation or the different middle pressure bus coming from same transformer station or come from the middle pressure bus of different switchyard or come from the single back line of pressing bus to feed out respectively in the difference of same switchyard and form Single-ring network.
5. system according to claim 1, it is characterized in that, when described cable system rack comprises dicyclic structure, the different middle pressure bus coming from same transformer station or the middle pressure bus coming from different substation respectively feed out a loop line road, become a partner with path and lay, from come from the different middle pressure bus of another transformer station or come from different substation a loop line road of pressing bus respectively to feed out and get in touch with respectively, form dual-ring network.
6. system according to claim 1, is characterized in that, when described cable system rack comprises the multi-joint network structure of multiple-limb, namely carry out branch after the middle pressure bus coming from transformer station feeds out circuit, a point number is 2 or 3.
7. system according to claim 1, it is characterized in that, when described cable system rack comprises N confession one for structure, come from the difference of same transformer station in the difference of pressing bus or coming from same switchyard the middle pressure bus of pressing bus or come from different substation or the middle pressure bus coming from different switchyard draws supply line, the extension wire of drawing with another transformer station or another switchyard, jointly be connected to ring-main unit or switchyard, open loop operation.
8. system according to claim 1, it is characterized in that, when described cable system rack comprises multiple monocyclic structure, between two groups of Single-ring network grid structures, interconnection is set, this distribution network structure wiring construction is that Single-ring network three power supply two leads one for Connection Mode, and Single-ring network grid structure comprises two power stations, and transformer series is between these two power stations, interconnection switch is interconnection switch open in usual, is arranged on transformer.
9. system according to claim 1, is characterized in that,
When load density is 1 ~ 5MW/km2, described built on stilts net rack comprises: many segmentations simply connected network structure;
When load density is 5 ~ 10MW/km2, described built on stilts net rack comprises: many segmentations appropriateness contact structure, and described cable system rack comprises following any one or various structures: the multi-joint network structure of monocyclic structure, multiple-limb and N for one for structure;
When load density is 10 ~ 30MW/km2, described cable system rack comprises: dicyclic structure.
10. system according to claim 1, is characterized in that,
When described built on stilts net rack comprises: during many segmentations simply connected network structure, segments in described built on stilts net rack circuit is 3 to 5, connectivity number is 1, radius of electricity supply is no more than 2 kms, on-load switch selected by block switch, interconnection switch, in distribution automation planning region, interconnection switch, the block switch of every bar circuit configure remote sensing module, remote signal module and remote control module;
When described built on stilts net rack comprises: during many segmentation appropriateness contact structures, described segments in described built on stilts net rack circuit is 3 to 5, described connectivity number is 2 to 3, described radius of electricity supply is no more than 2 kms, on-load switch selected by described block switch, described interconnection switch, in described distribution automation planning region, the described interconnection switch of every bar circuit, described block switch configure described remote sensing module, described remote signal module and described remote control module.
11. systems according to claim 1, it is characterized in that, when described cable system rack comprises monocyclic structure, the segments of described monocyclic structure is no more than 6, and connectivity number is 1, and radius of electricity supply is no more than 2 kms, ring main unit selected by block switch, interconnection switch, in distribution automation planning region, tie switches allocation three is distant, chooses suitable segmented configuration remote sensing module, remote signal module and remote control module;
When described cable system rack comprises dicyclic structure, the segments of described dicyclic structure is no more than 6, described connectivity number is 1, described radius of electricity supply is no more than 2 kms, described ring main unit selected by described block switch, described interconnection switch, in described distribution automation planning region, described tie switches allocation three is distant, chooses remote sensing module described in suitable segmented configuration, described remote signal module and described remote control module;
When described cable system rack comprises N confession one for structure, described N confession one is no more than 6 for the segments of structure, described connectivity number is no more than 3, described radius of electricity supply is no more than 2 kms, described ring main unit selected by described block switch, described interconnection switch, in described distribution automation planning region, described tie switches allocation three is distant, chooses remote sensing module described in suitable segmented configuration, described remote signal module and described remote control module;
When described cable system rack comprises the multi-joint network structure of multiple-limb, the segments of the multi-joint network structure of described multiple-limb is no more than 6, described connectivity number is no more than 3, described radius of electricity supply is no more than 2 kms, described ring main unit selected by described block switch, described interconnection switch, in described distribution automation planning region, described tie switches allocation three is distant, chooses remote sensing module described in suitable segmented configuration, described remote signal module and described remote control module.
12. systems according to claim 1, is characterized in that, described Control protection equipment at least comprise following any one: circuit breaker, relay protector, voltage transformer, current transformer.
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| CN111426906A (en) * | 2020-03-12 | 2020-07-17 | 广西电网有限责任公司电力科学研究院 | Grid structure applied to power distribution network real-environment test platform |
| CN111817288A (en) * | 2020-05-26 | 2020-10-23 | 广西电网有限责任公司电力科学研究院 | Site arrangement method and structure applied to power distribution network true test platform |
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