CN205489557U - Little electric wire netting and network system among urban network - Google Patents
Little electric wire netting and network system among urban network Download PDFInfo
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- CN205489557U CN205489557U CN201520879671.XU CN201520879671U CN205489557U CN 205489557 U CN205489557 U CN 205489557U CN 201520879671 U CN201520879671 U CN 201520879671U CN 205489557 U CN205489557 U CN 205489557U
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Abstract
The utility model provides a little electric wire netting and network system among urban network wherein uses the firewood that provides firm output electric power to send out system or gas turbine, loads for the interchange that inserts same feeder and supplies power to the system regards as supplementary power supply source with the scene storage, use the synchronous unit cooling of the antithetical couplet confession type heat supply that contains gas turbine to interchange load power supply for same feeder, use the direct current load power supply of distributed generator for inserting same dc bus, through the interchange load power supply for inserting same ac bus behind the dc -to -ac converter, and then realize being incorporated into the power networks through inserting one of them feeder behind another transformer. The utility model discloses with the target that is incorporated into the power networks, the load that supplies is boundary condition, has proposed the little electric wire netting and the network system base case that are adapted to urban network, possesses better engineering practicability.
Description
Technical field
This utility model relates to for electrical domain, particularly to the micro-grid connection system in a kind of urban distribution network.
Background technology
The energy resource structure of China and part throttle characteristics determine western part, northern conduct generating base, and east, middle part is as the electric power industry development characteristic of load center.Thus, by distance, jumbo passway for transmitting electricity connects the transmission of electricity form of generating base and load center to be become China and mainly transmits electricity form.But accident easily spreads when this form has an accident, and the peaking problem for load center causes bigger pressure.And transmit electricity the most at a distance, peak regulation is more difficult, therefore, it can consider to solve from the angle of dsm.And flexible distributed power supply can become distance, the important supplement of Large Copacity powering mode.But the distributed power generation commonly using new forms of energy is serious by natural cause restriction, and this factor directly results in the micro-capacitance sensor concept that distributed power source, power load, energy storage device and control device etc. are combined into.
In Practical Project, constituting the difference of power supply, the difference of micro-capacitance sensor typical structure classification, micro-capacitance sensor building site according to micro-capacitance sensor, build the difference of purpose, the synchronizing mode of last micro-capacitance sensor is also not quite similar.Micro-capacitance sensor typical case's power supply is broadly divided into the polytypes such as single power supply, wind-solar-storage joint generating, miniature gas turbine and alliance class power supply, biomass energy micro-capacitance sensor.Micro-capacitance sensor typical structure has exchange micro-capacitance sensor, direct-current grid, alternating current-direct current micro-capacitance sensor
Wherein, for the certain areas that renewable energy source category is the most single, mainly take to be suitable for local regenerative resource as micro-capacitance sensor fundamental power supply, simultaneously for meet different construction purposes, other new forms of energy power supplys of differently configured energy storage and auxiliary.In general, single power supply class area is main based on wind-powered electricity generation and photovoltaic.The wind resources such as the micro-capacitance sensor based on wind-powered electricity generation, is mainly used in China western, northern are a class or two classes, but the most remote area, it is mainly used in supplying electric power to locality, as the important supplement of bulk power grid.Additionally, the micro-capacitance sensor that southeastern coast province is based on wind-powered electricity generation, capacity is less, and is often furnished with other energy such as photovoltaic, energy storage, mainly based on scientific research, typically uses grid type, needs bulk power grid to support.
Off-network type photovoltaic micro, in order to solve the problem without sunlight in the evening, mainly meets the electricity needs in evening by configuring energy storage device.Being limited to cost, the supplied load of off-network type photovoltaic micro is the least, and less demanding to power supply reliability.Parallel networking type photovoltaic micro-capacitance sensor does not configures or configures energy storage on a small quantity, and configuration purpose predominantly improves the quality of power supply.Building site is then the city that electrical network is stronger, and often combines with building, it is to avoid takes up an area too much, such as installs grid-connected photovoltaic power generation system at communal facility, commercial building and The Factory Roof etc..
Wind-solar-storage joint micro-capacitance sensor of powering refers to the micro-capacitance sensor being major function form with photovoltaic generation and wind turbine power generation, can be formed have complementary advantages in conjunction with wind-powered electricity generation and the feature of photovoltaic generation.Such as, wind-power electricity generation generating on often daytime is few, and night, generating was many, and photovoltaic is antithesis.Scene combines the undulatory property that can reduce micro-capacitance sensor power supply to a certain extent.For embodying wind light mutual complementing in the range of widely, ensure that the quality of power supply of micro-capacitance sensor meets other requirements simultaneously, need to configure a certain amount of energy storage device.But wind-light storage micro-capacitance sensor is owing to being configured with a certain amount of energy storage device, cost is the highest, and in order to enable at utmost to weaken the exploitation pressure of high cost, this kind of micro-capacitance sensor is often preferable in scene resource, electricity market is the most ripe, and economically developed area is developed as pilot.The factor of cost limits the wind-light storage micro-capacitance sensor potentiality to be exploited in general area.
During the actual construction of micro-capacitance sensor, except the ranges of application such as wind-light storage are relatively wide, outside the power supply being of relatively low cost, also there is other types power supply.China all develops industrial park, high-tech park in many cities at present, and often there is relatively stable cooling and heating load demand this kind of garden.It is relatively low that gas turbine possesses unit power expense, environmental friendliness, energy utilization rate high, and therefore, gas turbine becomes the core force providing garden supply of cooling, heating and electrical powers.Generated electricity by fully burning natural gas pushing turbine, directly utilize waste gas heat supply or freezed by lithium bromide chiller, to meet cooling and heating load demand, improve energy utilization rate.But the principal element limiting gas turbine is implementing of source of the gas.China's natural gas reserve distribution is uneven, and West-East National Gas Transmission Project is limited for big and medium-sized cities, east natural gas supply, and price is the most expensive.Therefore combustion engine system utilizes occasion less at present, is only limitted to the big city that natural gas supply is comparatively sufficient, and is typically grid type electrical network, is only used for supplying cooling and heating load.
Biomass energy is divided into multiple, including wood chips, straw, biogas, house refuse etc..China natural resources is enriched, and different areas is also applied for different biomass energies.Such as, the northeast region that forestry is more flourishing, it is possible to use fell residue chip as biomass power generation raw material.The province that central and east agricultural is more flourishing, is suitable for straw, and grain processing residue etc. is as the raw material of biomass power generation.And vast rural area, suitably development animal waste marsh gas power generation etc., and use the biomass energy such as house refuse and agricultural crop straw simultaneously, based on these energy supplying systems, develop micro-capacitance sensor.
Exchange micro-capacitance sensor the most still micro-capacitance sensor main flow, is basic grid structure with ripe AC network, carries out load and micro-capacitance sensor power distribution in load side, become the blank of exchange micro-capacitance sensor.
More for distributed power source, that load is less situation, can select direct-current grid.Using direct-current grid, can reduce a large amount of current transformers used in exchange micro-capacitance sensor in a large number, make the electric power in distributed power source directly be dissolved by DC load, structure is the simplest, is lost less, in hgher efficiency.
Mixed type alternating current-direct current micro-capacitance sensor is associated with family AC network by AC system, is got in touch with direct-current grid by inverter.This micro-capacitance sensor flexible structure, it is adaptable to each type load.But this micro-capacitance sensor structure is relative complex, and relative construction cost is higher.
Visible, micro-capacitance sensor flexible structure, widely applicable, it is impossible to propose micro-grid connection mode only for a certain electrical network, load condition, should be according to boundary conditions such as periphery electrical network, load type or workload demands, it is considered to the micro-grid connection scheme of various boundary.Therefore, the most fast and effeciently select suitable micro-grid connection mode, to the construction efficiency important in inhibiting improving micro-capacitance sensor Practical Project.
Utility model content
This utility model provides the micro-grid connection system in a kind of urban distribution network, is the situation of external electrical network for urban distribution network, according to different grid-connected targets and supplied load, proposes the micro-capacitance sensor typical case's connect-in strategy adapted.
In order to achieve the above object, the micro-grid connection system that a technical scheme of the present utility model is to provide in a kind of urban distribution network, wherein comprise with middle pressure bus through points of common connection connection transformer to access the one or more of micro-capacitance sensor of external electrical network:
System sent out by the bavin using offer to stablize output power or gas turbine is that AC load is powered, system sent out by described AC load and described bavin or gas turbine is linked into the same feeder line after middle pressure bus, and using wind-light storage system access to this feeder line as the auxiliary power supply source of described AC load；Further, it is linked into the load on other feeder lines of at least one in addition to this feeder line, is connected directly to middle pressure bus by other feeder lines described；
Use the alliance type containing gas turbine to synchronize unit and be responsible for cooling and heating load is carried out cold and heat supply, and the AC load for the same feeder line after being linked into middle pressure bus with this Tong Bu unit of alliance type is powered；Further, it is linked into the load on other feeder lines of at least one in addition to this feeder line, is connected directly to middle pressure bus by other feeder lines described
Using distributed power source is that DC load is powered, and described DC load accesses same dc bus with described distributed power source；Power supply on described dc bus accesses an ac bus by inverter, and powers for accessing the AC load of same ac bus；The power supply of described ac bus is linked into one of them feeder line after middle pressure bus by another transformator；Further, it is linked into the load on other feeder lines of at least one in addition to this feeder line, is connected directly to middle pressure bus by other feeder lines described.
Preferably, sending out system with bavin or micro-capacitance sensor that AC load that gas turbine is same feeder line is powered, be arranged on industrial park, this micro-capacitance sensor uses AC system to be incorporated to original network system.
Preferably, stablize, with same feeder line apoplexy light-preserved system and providing, the AC load that system sent out by the bavin of output power or gas turbine is powered, its power supply reliability requires to be higher than the power supply reliability requirement of other loads being linked into another feeder line.
Preferably, send out containing the bavin stablizing output power in the micro-capacitance sensor of system or gas turbine, be provided with the gas turbine grid-connected with AC system or biomass unit.
Preferably, in the micro-capacitance sensor sending out system or gas turbine containing the bavin stablizing output power, send out system with bavin described in wind-light storage system replacement and be powered for described AC load.
Preferably, synchronize unit with the alliance type containing gas turbine and be responsible for cold and heat supply and take into account the micro-capacitance sensor that the AC load for same feeder line is powered, be arranged on industrial park or high-tech park；This micro-capacitance sensor uses AC system when being incorporated to original network system, and any one or its combination in any in the photovoltaic plant at another feeder line after middle pressure bus, blower fan, energy type energy storage device is that the AC load being linked into this another feeder line carries out auxiliary power supply；Access at another feeder line after middle pressure bus that have can power-off load.
Preferably, synchronize unit with the alliance type containing gas turbine and be responsible for cold and heat supply and take into account the micro-capacitance sensor that the AC load for same feeder line is powered, be arranged on industrial park or high-tech park；This micro-capacitance sensor uses ac and dc systems when being incorporated to original network system, any one or its combination in any in photovoltaic plant, blower fan, power-type energy storage device, carries out auxiliary power supply for being linked into the DC load of dc bus same with its place；
The power supply of dc bus is by being linked into another feeder line after middle pressure bus after inverter connection transformer, and is that some being linked into this another feeder line can be powered by power-off load；Accessing at another feeder line after middle pressure bus has other can power-off load.
Preferably, access at another feeder line after middle pressure bus can power-off load, its power supply reliability requires less than the AC load at other feeder lines or the power supply reliability requirement of DC load.
Preferably, micro-capacitance sensor containing distributed power source is arranged on each building roof in city or periphery vacant lot, the distributed power source of this micro-capacitance sensor comprises: any one in single power supply, wind-solar-storage joint power generating source, chemical fuel cell power supply, and described single power supply is photo-voltaic power supply or wind-powered electricity generation power supply；This micro-capacitance sensor uses AC system to be incorporated to original network system.
Preferably, any one or a combination thereof in photovoltaic plant, blower fan, power-type energy storage device, it is powered for being linked into the DC load of dc bus same with its place；Access at another feeder line after middle pressure bus and have other AC load；Access at another feeder line after middle pressure bus that have can power-off load；The power supply reliability requirement of described DC load, higher than the power supply reliability requirement of other loads in this micro-grid connection system.
Another technical scheme of the present utility model is to provide the micro-grid connection system in a kind of urban distribution network, comprises the most successively: transformer station's rank micro-capacitance sensor, feeder line rank micro-capacitance sensor, single multi-user class micro-capacitance sensor；
Described transformer station rank micro-capacitance sensor sets two switchyards, and each station sets two section of first bus, connects the first transformator by corresponding points of common connection and is incorporated to external electrical network；
Some photovoltaic plants of described single multi-user class micro-capacitance sensor, are linked into second bus of this grade, and make second bus of this grade be linked into first bus at respective switch station by the second transformator by this grade of corresponding feeder line；
One or more in system, other photovoltaic plants sent out by the blower fan of described single multi-user class micro-capacitance sensor, energy-storage system, bavin, are linked into the same section of triple bus-bar of this grade and power for being accessed the DC load of this triple bus-bar equally by commutator；Described triple bus-bar is connected with the respective feed connection of feeder line rank micro-capacitance sensor also by described 3rd transformator of feeder line rank micro-capacitance sensor, and connects the 4th transformator to be linked into first bus at respective switch station by the 4th bus of feeder line rank micro-capacitance sensor；
The photovoltaic plant of described feeder line rank micro-capacitance sensor is by a switching switch, select to be linked into the feeder line of this grade and and then be directly connected to first bus at respective switch station by the 5th bus of this grade, or selection is linked into the triple bus-bar of described single multi-user class micro-capacitance sensor of described single multi-user class micro-capacitance sensor；
Any one or its combination in any in the gas turbine of described feeder line rank micro-capacitance sensor, internal combustion engine, energy-storage battery is linked into the 6th bus of this grade, the power supply of the 6th bus is by another switching switch, select to be linked into the first bus by the feeder line at respective switch station, or select to be linked into the triple bus-bar of described single multi-user class micro-capacitance sensor.
In sum, this utility model is on the basis of fully investigating domestic and international micro-capacitance sensor laboratory system and Typical model project, in conjunction with micro-capacitance sensor self-characteristic and the energy resource structure of China, with micro-capacitance sensor typical electrical source module, study and propose the typical structure of distributed wind-light storage system based on micro-capacitance sensor, including the position etc. of the electrical wiring network structure within network topology, micro-capacitance sensor, power supply system (AC/DC power and three-phase/single phase power supply), corresponding load and distributed power source place micro-capacitance sensor.This utility model is with grid-connected target, and supplied load is boundary condition, it is proposed that is adapted to the micro-grid connection system-based scheme of urban distribution network, possesses preferable engineering practicability.
Accompanying drawing explanation
Fig. 1 is the schematic diagram in scheme 1A of the micro-grid connection system in urban distribution network described in the utility model；
Fig. 2 is the schematic diagram in this utility model in scheme 1B first embodiment；
Fig. 3 is the schematic diagram in this utility model in scheme 1B the second embodiment；
Fig. 4 is the schematic diagram in this utility model in scheme 1C；
Fig. 5 is the schematic diagram of one grid-connected assembled scheme of this utility model.
Detailed description of the invention
In this utility model based on the difference of extraneous electrical network constraints, with grid-connected target, supplied load is boundary condition, propose to be adapted to the micro-capacitance sensor grid-connected base case of typical case of various boundary, during Practical Project, all kinds of base case can be combined according to owner's aspect difference demand.
Grid-connected target in this utility model is urban distribution network, including urban district, and the periphery suburbs, industrial park, the area that the electrical network such as high-tech park is comparatively flourishing.In region, different regions are often built the original intention of micro-capacitance sensor and are not quite similar, and are generally speaking divided into following several types:
(1) power supply reliability is improved.This grid-connected target is the most modal, for the land's end of urban distribution network, often there is this type of requirement, and particularly some is positioned at the weight industrial load of surrounding city.In this case, enterprise typically considers power plant for self-supply or small power generation equipment, when, under extraneous grid fault conditions, power plant for self-supply starts, and powers for load.
(2) energy alliance mode is used to improve energy utilization rate.This grid-connected target is relatively common in high-tech park or industrial park.The general cool and thermal power load in area using this grid-connected target is close together, cooling and heating load is the clearest and the most definite, it is under conditions of load is powered there being electrical network, utilize co-feeding system, on the one hand self cooling and heating load demand is met, on the other hand improve energy efficiency, rely on relevant policies to improve economy to a certain extent.
(3) utilize micro-capacitance sensor to dissolve distributed power source, reduce power consumption or improve house property added value.This situation is in city or little range of industrial on-site utilizes more, many use roof construction, thus limits the capacity scale of this kind of micro-capacitance sensor.Generally speaking, this micro-capacitance sensor form is changeable, and the characteristic comparing that low capacity is layouted more is obvious.
The electric network composition that this utility model relates to belongs to the region of urban distribution network, generally city, shopping centre, high-tech park or weight industrial occupancy, and load type is mainly industry and commerce load, city load etc..
For industrial load, amount is stably the feature that two is the most prominent greatly.Additionally, for industrial park, high-tech park, industrial load often with Commercial Load, resident load coexists.In this garden, electric power system compares similar with resident load, but relative to resident load, garden internal loading characteristic peak-valley difference is less, and curve is the mildest.
City load includes that content is more, typically refers mainly to service trade, shows the loads such as large-scale mall, senior office building, hotel.Generally, large-scale mall, that senior office building part throttle characteristics mainly shows as load curve peak-valley difference is bigger, curve more rule and steady load, annual change is little, the peak of its peak of power consumption period and electrical network overall load is the most overlapping, and the closest with summer, winter temperature variation relation.For hotel, owing to hotel occupancy rate is uncertain, therefore hotel daily load curve is the most uncertain, but difference is bigger on weekdays and between festivals or holidays, tourist season and dull season.
For with basic premises such as Shangcheng District micro-capacitance sensor construction object, part throttle characteristics, the utility model proposes the micro-grid connection typical scenario adapting to city network:
Scheme 1A:
The building site of this programme be industrial park or other have the place of demand, and grid-connected main target is for improving load power supply reliability.Micro-capacitance sensor power supply sends out system or gas turbine etc. based on bavin can stablize the power supply of output power, for power supply reliability being required, higher load is powered, uses part wind-light storage system for auxiliary simultaneously, sends out system or gas burning system fuel cost with the suitable bavin that reduces.Micro-capacitance sensor uses AC system to be incorporated to the original network system of on-site.
In exchange micro-capacitance sensor based on CERTS system, supplied load divides Main Basis power supply reliability requirement, requires higher important load for power supply reliability, can be powered by A feeder line, have the support of energy storage device.Power supply reliability is required general load, can be powered by B feeder line, this feeder line be installed a certain amount of distributed power source and powers.Other loads can be powered by feeder line C.
On this basis, the typical connect-in strategy of scheme 1A is as it is shown in figure 1, comprise during external electrical network is connected by transformator and points of common connection (PCC) and press bus, hereafter, system sent out by bavin, and directly and important load accesses same feeder line A, it is ensured that can power for important load in time when outside grid cut-off；Wind-light storage system access this feeder line A is as auxiliary.General load then accesses another feeder line B.
Scheme 1B:
The building site of this programme is positioned at industrial park or high-tech park, and grid-connected main target, for improving energy utilization rate, utilizes energy alliance mode solve in garden cold and heat supply problem and take into account power supply reliability.Micro-capacitance sensor power supply uses the alliance type based on gas turbine to synchronize unit, is aided with low capacity photovoltaic, wind-powered electricity generation and energy storage device, AC system or alternating current-direct current micro-grid system can be used to be connected to the grid.
Scheme 1B is electricity determining by heat mode with scheme 1B that differs primarily in that of scheme 1A, principal security on-site heating and cooling, on the basis of ensureing cooling and heating load, it is ensured that part electric load.Therefore, in such micro-capacitance sensor, the power supply reliability of electric load can only be taken into account, it is impossible to ensures.
The AC system connect-in strategy of scheme 1B is as in figure 2 it is shown, the alliance type being responsible for cooling and heating load synchronizes unit and the important load same feeder line A of access；The power supply that photovoltaic plant or blower fan or energy type energy storage device provide is as auxiliary, for accessing the power supplies such as other important loads of same feeder line C, important office load；Can be powered by feeder line B by power-off load, and powered by bulk power grid under net state, when off-network is run, this load can excise.
Additionally, it is important DC load (such as central office) power supply that scheme 1B can directly select straight-flow system, it is also possible to select AC system to take into account other loads, structure has bigger difference with scheme 1A.
The ac and dc systems connect-in strategy of scheme 1B is as shown in Figure 3, at feeder line A, B essentially identical with Fig. 2, difference is that photovoltaic plant or blower fan or power-type energy storage device etc. access dc bus, powers for the same important office load accessing this dc bus；The power supply of dc bus accesses feeder line C after being processed by inverter, transformator, and can access at this feeder line C can power-off load.
Scheme 1C:
The building site of this connect-in strategy is positioned at each building roof in city or periphery vacant lot, and grid-connected target is distributed power source of dissolving, small-scale application, improves house property added value.The type of micro-capacitance sensor power supply is mainly considered as the single power supply such as photovoltaic, wind-powered electricity generation, or uses the type of power such as wind-solar-storage joint generating, chemical fuel cell.The original AC system in house is utilized to be connected to the grid.
As shown in Figure 4, photovoltaic plant or blower fan or power-type energy storage device etc. access dc bus to the typical connect-in strategy of scheme 1C, power for the same important office load accessing this dc bus；After the power supply of dc bus is by inverter, the AC load for municipal administration load, market, supermarket etc. is powered, and can access feeder line C by transformator further；General load and feeder line A, B can be respectively connected to by power-off load.
In sum, scheme 1A is grid-connected target to improve power supply reliability, it is adaptable to can not the important load of power-off, the quality of power supply requires height, and it is main for therefore using bavin to send out system, adds and joins a small amount of wind-light storage system, under conditions permit, optional gas turbine, biomass unit, grid-connected in AC system mode；If load is less demanding to the quality of power supply, it is wind-light storage system that bavin can be sent out system replacement.Option b is grid-connected target to solve cooling and heating load demand, take into account power supply reliability, cooling and heating load must is fulfilled for, and electric load is taken into account, power supply selects based on gas turbine, adds and joins a small amount of wind-light storage, grid-connected by AC system, straight-flow system mode, electricity determining by heat, thus power supply reliability is not done and ensures.Scheme 1C is grid-connected target with distributed power source of dissolving, it is adaptable to the load such as ordinarily resident, business, and selecting single power supply or wind-light storage, fuel cell etc. is main power source, grid-connected in AC system mode.
But, in Practical Project, these base cases can not contain all demands, general by being combined, and selects suitable grid-connected assembled scheme.
An example as shown in Figure 5 is certain institute's micro-capacitance sensor project, grid-connected target is scientific and technical research, take into account the power supply reliability maximally utilizing and improving load of the energy, therefore apply more eurypalynous micro-capacitance sensor power supply: photovoltaic electrification component, wind power generating set, miniature combustion engine group and diesel generating set.This engineering makes full use of the roof in campus and the photovoltaic generation of open field installation certain capacity and wind generator system, and accesses gas turbine, energy storage device, electric automobile charging station, powers for institute's internal loading together with bulk power grid.Meanwhile, build intelligent electric power utilization system, realize intelligent power two-way interaction in graduate students'dormitory building.
A kind of typical structure of exchange micro-capacitance sensor, is that the switching station that main micro-capacitance sensor is set to 10kV is basic as grid structure, and between switching station bus, bus connection switch generally disconnects；One-level micro-capacitance sensor can be made up of the ring-main unit under this switching station, distribution substation etc., two sections of buses of switching station provide power supply respectively；Two grades of micro-capacitance sensor can be made up of user's interior distribution room, and by switching station or ring-main unit, distribution substation powers respectively.
On this basis, this example defines transformer station's rank micro-capacitance sensor as shown in Figure 5, feeder line rank micro-capacitance sensor, single multi-user class micro-capacitance sensor (corresponding main micro-capacitance sensor, one-level micro-capacitance sensor, two grades of micro-capacitance sensor respectively).Transformer station's rank micro-capacitance sensor sets two switchyards, and each station sets two sections of buses；The photovoltaic plant of single multi-user class micro-capacitance sensor can access a bus of this grade by corresponding feeder line, and makes the bus of this grade be accessed the bus at respective switch station by transformator；The photovoltaic plant of single multi-user class micro-capacitance sensor, blower fan, energy-storage system, bavin are sent out system etc. and are accessed the same section of bus of this grade, can be this grade to access the DC load of this section of bus equally by commutator power, and this same section of bus is linked into a feeder line of feeder line rank micro-capacitance sensor by transformator；The power supply that the bus of feeder line rank micro-capacitance sensor can obtain from described single multi-user class micro-capacitance sensor is linked into respective switch station feeder line and then the bus of access switchyard by transformator, or the power supply of the photovoltaic plant accessing this feeder line rank micro-capacitance sensor feeder line can also be obtained, and directly accessed the bus of switchyard by the feeder line at respective switch station；The photovoltaic plant of feeder line rank micro-capacitance sensor, selects to access the feeder line of this grade by a switching switch, or selects to access described same section of bus of described single multi-user class micro-capacitance sensor；The gas turbine of described feeder line rank micro-capacitance sensor, internal combustion engine, energy-storage battery etc., a switching switch is connected by this level one bus, to select to access a feeder line and then the bus at connecting valve station at respective switch station, or select to access described same section of bus of described single multi-user class micro-capacitance sensor.
This project is positioned at urban district, periphery electrical network belongs to urban distribution network, and this project purpose is to build the micro-grid system of a set of perfect in shape and function, based on scientific research demand, take into account and realize photovoltaic, the maximally utilizing of blower fan regenerative resource, therefore consider that base case is scheme 1A and scheme 1C, both schemes are combined, both the requirement improving power supply reliability had been met, it is also possible to meet multiple micro-capacitance sensor power supply and comprehensively use the scientific research value brought, make this project meet the scientific research requirement of many loads, many power supplys.
Although content of the present utility model has been made to be discussed in detail by above preferred embodiment, but it should be appreciated that the description above is not considered as restriction of the present utility model.After those skilled in the art have read foregoing, multiple amendment of the present utility model and replacement all be will be apparent from.Therefore, protection domain of the present utility model should be limited to the appended claims.
Claims (11)
1. the micro-grid connection system in a urban distribution network, it is characterised in that
Described micro-grid connection system, comprises with middle pressure bus through points of common connection connection transformer to access the one or more of micro-capacitance sensor of external electrical network:
System sent out by the bavin using offer to stablize output power or gas turbine is that AC load is powered, system sent out by described AC load and described bavin or gas turbine is linked into the same feeder line after middle pressure bus, and using wind-light storage system access to this feeder line as the auxiliary power supply source of described AC load；Further, it is linked into the load on other feeder lines of at least one in addition to this feeder line, is connected directly to middle pressure bus by other feeder lines described；
Use the alliance type containing gas turbine to synchronize unit and be responsible for cooling and heating load is carried out cold and heat supply, and the AC load for the same feeder line after being linked into middle pressure bus with this Tong Bu unit of alliance type is powered；Further, it is linked into the load on other feeder lines of at least one in addition to this feeder line, is connected directly to middle pressure bus by other feeder lines described；
Using distributed power source is that DC load is powered, and described DC load accesses same dc bus with described distributed power source；Power supply on described dc bus accesses an ac bus by inverter and powers for accessing the AC load of same ac bus；The power supply of described ac bus is linked into one of them feeder line after middle pressure bus by another transformator；Further, it is linked into the load on other feeder lines of at least one in addition to this feeder line, is connected directly to middle pressure bus by other feeder lines described.
2. the micro-grid connection system in urban distribution network as claimed in claim 1, it is characterised in that
Sending out system with bavin or micro-capacitance sensor that AC load that gas turbine is same feeder line is powered, be arranged on industrial park, this micro-capacitance sensor uses AC system to be incorporated to original network system.
3. the micro-grid connection system in urban distribution network as claimed in claim 1 or 2, it is characterised in that
Stablize, with same feeder line apoplexy light-preserved system and providing, the AC load that system sent out by the bavin of output power or gas turbine is powered, its power supply reliability requires to be higher than the power supply reliability requirement of other loads being linked into another feeder line.
4. the micro-grid connection system in urban distribution network as claimed in claim 2, it is characterised in that
Send out containing the bavin stablizing output power in the micro-capacitance sensor of system or gas turbine, be provided with the gas turbine grid-connected with AC system or biomass unit.
5. the micro-grid connection system in urban distribution network as claimed in claim 2, it is characterised in that
In the micro-capacitance sensor sending out system or gas turbine containing the bavin stablizing output power, send out system with bavin described in wind-light storage system replacement and be powered for described AC load.
6. the micro-grid connection system in urban distribution network as claimed in claim 1, it is characterised in that
Synchronize unit with the alliance type containing gas turbine be responsible for cold and heat supply and take into account the micro-capacitance sensor that the AC load for same feeder line is powered, be arranged on industrial park or high-tech park；This micro-capacitance sensor uses AC system when being incorporated to original network system, and any one or its combination in any in the photovoltaic plant at another feeder line after middle pressure bus, blower fan, energy type energy storage device is that the AC load being linked into this another feeder line carries out auxiliary power supply；Access at another feeder line after middle pressure bus that have can power-off load.
7. the micro-grid connection system in urban distribution network as claimed in claim 1, it is characterised in that
Synchronize unit with the alliance type containing gas turbine be responsible for cold and heat supply and take into account the micro-capacitance sensor that the AC load for same feeder line is powered, be arranged on industrial park or high-tech park；This micro-capacitance sensor uses ac and dc systems when being incorporated to original network system, any one or its combination in any in photovoltaic plant, blower fan, power-type energy storage device, carries out auxiliary power supply for being linked into the DC load of dc bus same with its place；
The power supply of dc bus is by being linked into another feeder line after middle pressure bus after inverter connection transformer, and is that some being linked into this another feeder line can be powered by power-off load；Accessing at another feeder line after middle pressure bus has other can power-off load.
Micro-grid connection system in urban distribution network the most as claimed in claims 6 or 7, it is characterised in that
Access at another feeder line after middle pressure bus can power-off load, its power supply reliability requires less than the AC load at other feeder lines or the power supply reliability requirement of DC load.
9. the micro-grid connection system in urban distribution network as claimed in claim 1, it is characterised in that
Micro-capacitance sensor containing distributed power source is arranged on each building roof in city or periphery vacant lot, the distributed power source of this micro-capacitance sensor comprises: any one in single power supply, wind-solar-storage joint power generating source, chemical fuel cell power supply, and described single power supply is photo-voltaic power supply or wind-powered electricity generation power supply；This micro-capacitance sensor uses AC system to be incorporated to original network system.
10. the micro-grid connection system in urban distribution network as claimed in claim 8, it is characterised in that
Any one or a combination thereof in photovoltaic plant, blower fan, power-type energy storage device, is powered for being linked into the DC load of dc bus same with its place；Access at another feeder line after middle pressure bus and have other AC load；Access at another feeder line after middle pressure bus that have can power-off load；The power supply reliability requirement of described DC load, higher than the power supply reliability requirement of other loads in this micro-grid connection system.
Micro-grid connection system in 11. 1 kinds of urban distribution networks, it is characterised in that comprise successively: transformer station's rank micro-capacitance sensor, feeder line rank micro-capacitance sensor, single multi-user class micro-capacitance sensor；
Wherein, described transformer station rank micro-capacitance sensor sets two switchyards, and each station sets two section of first bus, connects the first transformator by corresponding points of common connection and is incorporated to external electrical network；
Some photovoltaic plants of described single multi-user class micro-capacitance sensor, are linked into second bus of this grade, and make second bus of this grade be linked into first bus at respective switch station by the second transformator by this grade of corresponding feeder line；
One or more in system, other photovoltaic plants sent out by the blower fan of described single multi-user class micro-capacitance sensor, energy-storage system, bavin, are linked into the same section of triple bus-bar of this grade and power for being accessed the DC load of this triple bus-bar equally by commutator；Described triple bus-bar is connected with the respective feed connection of feeder line rank micro-capacitance sensor also by described 3rd transformator of feeder line rank micro-capacitance sensor, and connects the 4th transformator to be linked into first bus at respective switch station by the 4th bus of feeder line rank micro-capacitance sensor；
The photovoltaic plant of described feeder line rank micro-capacitance sensor is by a switching switch, select to be linked into the feeder line of this grade and and then be directly connected to first bus at respective switch station by the 5th bus of this grade, or selection is linked into the triple bus-bar of described single multi-user class micro-capacitance sensor of described single multi-user class micro-capacitance sensor；
Any one or its combination in any in the gas turbine of described feeder line rank micro-capacitance sensor, internal combustion engine, energy-storage battery is linked into the 6th bus of this grade, the power supply of the 6th bus is by another switching switch, select to be linked into the first bus by the feeder line at respective switch station, or select to be linked into the triple bus-bar of described single multi-user class micro-capacitance sensor.
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| CN201520879671.XU CN205489557U (en) | 2015-11-06 | 2015-11-06 | Little electric wire netting and network system among urban network |
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| CN201520879671.XU CN205489557U (en) | 2015-11-06 | 2015-11-06 | Little electric wire netting and network system among urban network |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105226717A (en) * | 2015-11-06 | 2016-01-06 | 国网上海市电力公司 | Micro-grid connection system in urban distribution network |
| CN107196304A (en) * | 2017-06-08 | 2017-09-22 | 林浩博 | A kind of micro grid control system |
| CN107240929A (en) * | 2017-06-08 | 2017-10-10 | 林浩博 | A kind of miniature improvement grid control system |
| CN107294088A (en) * | 2017-06-28 | 2017-10-24 | 中国能源建设集团甘肃省电力设计院有限公司 | Application process and many power supply direct-furnish electric systems are built for the increment power distribution network that electricity changes |
| CN116706905A (en) * | 2023-08-08 | 2023-09-05 | 国网浙江省电力有限公司宁波供电公司 | Multi-energy prediction and scheduling method, equipment and storage medium based on power system |
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- 2015-11-06 CN CN201520879671.XU patent/CN205489557U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105226717A (en) * | 2015-11-06 | 2016-01-06 | 国网上海市电力公司 | Micro-grid connection system in urban distribution network |
| CN107196304A (en) * | 2017-06-08 | 2017-09-22 | 林浩博 | A kind of micro grid control system |
| CN107240929A (en) * | 2017-06-08 | 2017-10-10 | 林浩博 | A kind of miniature improvement grid control system |
| CN107294088A (en) * | 2017-06-28 | 2017-10-24 | 中国能源建设集团甘肃省电力设计院有限公司 | Application process and many power supply direct-furnish electric systems are built for the increment power distribution network that electricity changes |
| CN107294088B (en) * | 2017-06-28 | 2023-08-01 | 中国能源建设集团甘肃省电力设计院有限公司 | Incremental power distribution network construction application method for electric power change and multi-power direct power supply system |
| CN116706905A (en) * | 2023-08-08 | 2023-09-05 | 国网浙江省电力有限公司宁波供电公司 | Multi-energy prediction and scheduling method, equipment and storage medium based on power system |
| CN116706905B (en) * | 2023-08-08 | 2023-11-03 | 国网浙江省电力有限公司宁波供电公司 | Multi-energy prediction and scheduling method, equipment and storage medium based on power system |
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