CN202633970U - Distributed power grid system - Google Patents
Distributed power grid system Download PDFInfo
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- CN202633970U CN202633970U CN 201220181957 CN201220181957U CN202633970U CN 202633970 U CN202633970 U CN 202633970U CN 201220181957 CN201220181957 CN 201220181957 CN 201220181957 U CN201220181957 U CN 201220181957U CN 202633970 U CN202633970 U CN 202633970U
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Abstract
The utility model relates to technologies of the distributed generation technology, the distributed power supply and the micro power grid, more particularly to a distributed power grid system that is suitable for not being accessed to a large power grid for operation. The system comprises a reserve power supply, an energy storage device, a power management device, a first circuit breaker, a second circuit breaker, a common bus, a third circuit breaker, a fourth circuit breaker, a fifth circuit breaker, a sixth circuit breaker, a seventh circuit breaker, an eighth circuit breaker, a first distributed power supply, a second distributed power supply, a third distributed power supply, a first load, a second load and a third load. According to the provided system, a passive island control mode and the power control of a distributed power grid are utilized so as to obtain technical benefits of maximum comprehensive value, maximum efficiency, and best cost performance. Under the passive island control mode, the active power output is improved and the power outputs of all the energy storage devices can be enhanced according to load demands, so that the power grid system is advanced and effective.
Description
Technical field
The utility model relates to distributed power generation technology, distributed power source and micro power network field, specifically is a kind of distributed power grid system that does not insert big operation of power networks that is applicable to.
Background technology
At present, electrical network is given more sustained attention as one of China's national development strategy key content.The core of target grid is; Construction possesses the network system of intelligent decision and adaptive ability; This network system allows the multipotency source to network and adopts distributed management; Thereby can monitor in real time and information gathering the electricity consumption situation, realize allocation optimum and utilization, improve the reliability and the efficiency of energy utilization of power grid operation electric energy.The kind of known distributed power source is a lot, comprises small power station, wind power generation, photo-voltaic power supply, fuel cell and energy storage device.But because distributed power source (for example solar energy and wind power generation) receives the influence of natural conditions, there is discontinuous or unstable situation in electric energy output.How making distributed power source can satisfy user's need for electricity through configuration, is the problem that people pay close attention to.In addition, need remote effectively transmission of electric energy in some more remote areas, power plant is in order to solve the problem of power delivery, in electric power storage and send and done a large amount of inputs aspect electric.Therefore, the returns of investment of how maximum performance electric energy, the conveying cost that reduces electric energy becomes the problem of needing solution now badly.
The utility model content
The purpose of the utility model is to solve the above problems; A kind of distributed power grid system is provided; This network system is utilized passive isolated island control model; And the power of distributed power grid system control, each distributed power source can be by factor decision output variables separately such as the characteristic of self power output and cost performances, to obtain comprehensive value maximization, maximizing efficiency and the highest technical benefits of cost performance as separate unit.Under this passive isolated island control model, not only improved active power output, and each energy storage device also can improve power output according to workload demand is corresponding, make network system more advanced, more effective.
For realizing above-mentioned purpose, the technical scheme that the utility model adopts is:
A kind of distributed power grid system comprises with lower unit:
One stand-by power supply is connected with an energy storage device, an energy conservation device and one first circuit breaker electric respectively;
One energy storage device is electrically connected with said stand-by power supply, one second circuit breaker and an energy conservation device respectively;
One energy conservation device is electrically connected with said stand-by power supply, said energy storage device, said second circuit breaker, one the 6th circuit breaker, one the 7th circuit breaker, one the 8th circuit breaker, first distributed power source, second distributed power source and the 3rd distributed power source respectively;
One first circuit breaker is connected with said stand-by power supply, a common bus and said second circuit breaker electric respectively;
One second circuit breaker is electrically connected with said energy storage device, said energy conservation device, said first circuit breaker and said common bus respectively;
One common bus is connected with said first circuit breaker, said second circuit breaker, said the 3rd circuit breaker, said the 4th circuit breaker and said the 5th circuit breaker electric respectively;
One the 3rd circuit breaker is electrically connected with said common bus, said the 6th circuit breaker and said first distributed power source respectively;
One the 4th circuit breaker is electrically connected with said common bus, said the 7th circuit breaker and said second distributed power source respectively;
One the 5th circuit breaker is electrically connected with said common bus, said the 8th circuit breaker and said the 3rd distributed power source respectively;
One the 6th circuit breaker is electrically connected with said the 3rd circuit breaker, said first distributed power source, said energy conservation device and one first load respectively;
One the 7th circuit breaker is electrically connected with said the 4th circuit breaker, said second distributed power source, said energy conservation device and one second load respectively;
One the 8th circuit breaker is electrically connected with said the 5th circuit breaker, said the 3rd distributed power source, said energy conservation device and one the 3rd load respectively;
First distributed power source is electrically connected with said the 3rd circuit breaker, said the 6th circuit breaker and said energy conservation device respectively;
Second distributed power source is electrically connected with said the 4th circuit breaker, said the 7th circuit breaker and said energy conservation device respectively;
The 3rd distributed power source is electrically connected with said the 5th circuit breaker, said the 8th circuit breaker and said energy conservation device respectively;
One first load is connected with said the 6th circuit breaker electric;
One second load is connected with said the 7th circuit breaker electric;
One the 3rd load is connected with said the 8th circuit breaker electric.
Further, said first distributed power source is one or more distributed power sources.
Further, when said first distributed power source was a plurality of distributed power source, a plurality of first distributed power sources were connected in parallel with each other.
Further, said second distributed power source is one or more distributed power sources.
Further, when said second distributed power source was a plurality of distributed power source, a plurality of second distributed power sources were connected in parallel with each other.
Further, said the 3rd distributed power source is one or more distributed power sources.
Further, when said the 3rd distributed power source was a plurality of distributed power source, a plurality of the 3rd distributed power sources were connected in parallel with each other.
Further, described stand-by power supply adopts the fuel power supply.
Further, described energy storage device comprises super capacitor or ultrahigh speed flywheel.
Further, described energy conservation device comprises several power electronic device.
The good effect of a kind of distributed power grid of the utility model system is:
(1) utilize the power of passive isolated island control model and distributed power grid system to control; Each distributed power source can obtain comprehensive value maximization, maximizing efficiency and the highest technical benefits of cost performance by factor decision output variables separately such as the characteristic of self power output and cost performances as separate unit.Under this passive isolated island control model, not only improved active power output, and each energy storage device also can improve power output according to workload demand is corresponding, make network system more advanced, more effective.
(2) utilize standby power supply device stable with the power supply of the network system of assurance independent operating.When other regenerative resources are sufficient relatively, stop the operation of non-renewable fuel TRT automatically, can save non-renewable resources like this.
(3) a plurality of distributed power sources can provide electric energy and voltage support to load simultaneously, effectively reduce the dependence of load to big electrical network, share the power supply pressure of big electrical network, reduce the long distance power transmission loss.
When the electric energy that (4) provides when distributed power source overloads electricity consumption, charge to energy storage device, in order to insufficient the time, powering to the load through energy manager.
(5) when the electric weight of all power supplys in the whole network system can not satisfy the demands, through the non-important load of energy manager automatic disconnection, to satisfy the operation of severity level load.
Description of drawings
Fig. 1 is the structural representation of a kind of distributed power grid of the utility model system;
Label among the figure is represented respectively:
1, stand-by power supply; 2, energy storage device; 3, energy manager; 4, first circuit breaker; 5, second circuit breaker; 6, common bus; 7, the 3rd circuit breaker; 8, the 4th circuit breaker; 9, the 5th circuit breaker; 10, the 6th circuit breaker; 11, the 7th circuit breaker; 12, the 8th circuit breaker; 13, first distributed power source; 14, second distributed power source; 15, the 3rd distributed power source; 16, first feedback line; 17, second feedback line; 18, the 3rd feedback line; 19, first load; 20, second load; 21, the 3rd load.
Embodiment
Elaborate below in conjunction with the embodiment of accompanying drawing to a kind of distributed power grid of the utility model system.
The described network system of the utility model is utilized passive isolated island control model, to obtain comprehensive value maximization, maximizing efficiency and the highest technical benefits of cost performance.Passive isolated island control model is meant distributed power grid system (or micro power network system) under the situation that does not insert big electrical network, can continue powering load in some remote areas.Under this passive isolated island control model, said distributed power grid does not insert big operation of power networks, can adjust the output variable of distributed power source automatically according to the demand of power load simultaneously, makes whole network system more advanced, more effective.
Referring to Fig. 1, a kind of distributed power grid system comprises: a stand-by power supply 1 is electrically connected with an energy storage device 2, an energy conservation device 3 and one first circuit breaker 4 respectively; One energy storage device 2 is electrically connected with said stand-by power supply 1, one second circuit breaker 5 and an energy conservation device 3 respectively; One energy conservation device 3 is electrically connected with said stand-by power supply 1, said energy storage device 2, said second circuit breaker 5, one the 6th circuit breaker 10, one the 7th circuit breaker 11, one the 8th circuit breaker 12, first distributed power source 13, second distributed power source 14 and the 3rd distributed power source 15 respectively; One first circuit breaker 4 is electrically connected with said stand-by power supply 1, a common bus 6 and said second circuit breaker 5 respectively; One second circuit breaker 5 is electrically connected with said energy storage device 2, said energy conservation device 3, said first circuit breaker 4 and said common bus 6 respectively; One common bus 6 is electrically connected with said first circuit breaker 4, said second circuit breaker 5, said the 3rd circuit breaker 7, said the 4th circuit breaker 8 and said the 5th circuit breaker 9 respectively; One the 3rd circuit breaker 7 is electrically connected with said common bus 6, said the 6th circuit breaker 10 and said first distributed power source 13 respectively; One the 4th circuit breaker 8 is electrically connected with said common bus 6, said the 7th circuit breaker 11 and said second distributed power source 14 respectively; One the 5th circuit breaker 9 is electrically connected with said common bus 6, said the 8th circuit breaker 12 and said the 3rd distributed power source 15 respectively; One the 6th circuit breaker 10 is electrically connected with said the 3rd circuit breaker 7, said first distributed power source 13, said energy conservation device 3 and one first load 19 respectively; One the 7th circuit breaker 11 is electrically connected with said the 4th circuit breaker 8, said second distributed power source 14, said energy conservation device 3 and one second load 20 respectively; One the 8th circuit breaker 12 is electrically connected with said the 5th circuit breaker 9, said the 3rd distributed power source 15, said energy conservation device 3 and one the 3rd load 21 respectively; First distributed power source 13 is electrically connected with said the 3rd circuit breaker 7, said the 6th circuit breaker 10 and said energy conservation device 3 respectively; Second distributed power source 14 is electrically connected with said the 4th circuit breaker 8, said the 7th circuit breaker 11 and said energy conservation device 3 respectively; The 3rd distributed power source 15 is electrically connected with said the 5th circuit breaker 9, said the 8th circuit breaker 12 and said energy conservation device 3 respectively; One first load 19 is electrically connected with said the 6th circuit breaker 10; One second load 20 is electrically connected with said the 7th circuit breaker 11; One the 3rd load 21 is electrically connected with said the 8th circuit breaker 12.
A kind of distributed power grid of the utility model system, said first distributed power source 13, said second distributed power source 14 and said the 3rd distributed power source 15 all have one or more distributed power sources.(referring to Fig. 1) in the present embodiment, said first distributed power source 13, said second distributed power source 14 and said the 3rd distributed power source 15 all have 3 distributed power sources that are connected in parallel with each other.
Described stand-by power supply 1 adopts more stable fuel power supply (for example hydrogen fuel cell) relatively.When using a plurality of distributed power sources; This distributed power supply system is provided with more stable stand-by power supply (or claiming subsequent use TRT) relatively; The stand-by power supply 1 main fuel power supply that uses generates electricity; In the time of other renewable energy power generation devices (for example photovoltaic generating system, wind generator system) electricity shortage, start metastable stand-by power supply 1, stable with the power supply of the distributed power grid system that guarantees independent operating.When other regenerative resources are sufficient relatively, stop the operation of non-renewable fuel TRT automatically, to save non-renewable resources.
Described energy storage device 2 comprises super capacitor or ultrahigh speed flywheel.This energy storage device 2 is energy storage devices of enough capacity, the stability during with assurance distributed power grid system independent operating.
Described energy conservation device 3 comprises some power electronic device.Wherein said power electronic device, combining inverter for example, static switch or the like.The power output size of each distributed power source is by energy manager 3 unified adjustings.In the structure of said distributed power grid system, a plurality of distributed power sources can provide electric energy and voltage support to load simultaneously, effectively reduce the dependence of load to big electrical network, have shared the power supply pressure of big electrical network, have reduced the long distance power transmission loss.When the electric energy that provides when distributed power source overloads electricity consumption, through energy manager 3 to energy storage device 2 chargings, in order to insufficient the time, powering to the load.
First distributed power source 13, second distributed power source 14 and the 3rd distributed power source 15 mainly be through some new forms of energy with power supply, wherein said new forms of energy, wind power generation for example, seawave power generation or the like.
Based on the distributed power source independent operating of new forms of energy and form in the distributed power grid system, further comprise first feedback line 16, second feedback line 17 and the 3rd feedback line 18.Be electrically connected with the 6th circuit breaker 10 through first feedback line, 16, the three circuit breakers 7.Be electrically connected with the 7th circuit breaker 11 through second feedback line, 17, the four circuit breakers 8.Be electrically connected with the 8th circuit breaker 12 through the 3rd feedback line 18, the five circuit breakers 9.Independent separately the installation is provided with a plurality of distributed power sources (first distributed power source 13, second distributed power source 14 and the 3rd distributed power source 15) on every feedback line; Load being provided with on three feedback lines on the wherein a certain feedback line is non-important load; The 3rd load 21 that is provided with in the present embodiment on the 3rd feedback line 18 is non-important load; Promptly in the overload operation of distributed power grid system, can break off, but the load that can not produce considerable influence to distributed power grid system and user.Other loads then are set to important load, for example first load 19 and second load 20.That is to say; First distributed power source 13 on first feedback line 16, second distributed power source 14 on second feedback line 17 and the 3rd distributed power source 15 on the 3rd feedback line 18 preferentially provide electric energy to first load 19, second load 20 and the 3rd load 21 successively; So not only can reduce the conveying cost of electric energy, and also improve the stability of electrical network.
When all distributed power sources in the whole distributed power grid system and stand-by power supply 1 and energy storage device 2 simultaneously all the time for load (first load, 19, second load the 20 and the 3rd load 21) power supply; The electric energy of all power supplys can not satisfy the power load demand; The 8th circuit breaker 12 that then breaks off on non-important load (like the 3rd load 21 on the 3rd feedback line 18) and the 3rd feedback line 18 through energy manager 3; The electric energy that the 3rd distributed power source 15 of the 3rd feedback line 18 provides turns to first load 19 and second load 20 on second feedback line 17 on first feedback line 16, the operation of the load of As soon as possible Promising Policy severity level (like first load 19 and second load 20) respectively.
The control strategy of the distributed power grid system of passive isolated island mode operation mainly is the power control through the distributed power grid system; Each distributed power source can be by factor decision output variables separately such as the characteristic of self power output and cost performances, to obtain comprehensive value maximization, maximizing efficiency and the highest technical benefits of cost performance as separate unit.For example, the distributed power grid system adopts photo-voltaic power supply and energy storage device (fuel cell) to load electric energy to be provided.Several kinds of situation below in power supply process, existing: first kind of situation, photo-voltaic power supply power output are greater than loading demand, and the redundance of photo-voltaic power supply output electric weight then is stored in the energy storage device, and fuel cell is not worked in this process; Second kind of situation, the photo-voltaic power supply power output just equals loading demand, and fuel cell is not worked yet in this process; The third situation, photo-voltaic power supply power output are less than loading demand, and fuel cell needs work in this process, and the output electric weight of fuel cell has remedied the deficiency of photo-voltaic power supply output variable.In all processes, satisfying under the situation of loading demand, the least possible usefulness of fuel cell is because fuel cell is expensive relatively more.Consider cost factor, adopt following method as far as possible: when the lower electric energy that distributed power source produced of cost was enough to drive load, the higher energy storage device of cost just can quit work, and to reach maximizing efficiency, cost performance is the highest like this.
The above only is the preferred embodiment of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model structure; Can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection range of the utility model.
Claims (10)
1. a distributed power grid system is characterized in that, comprises with lower unit:
One stand-by power supply is connected with an energy storage device, an energy conservation device and one first circuit breaker electric respectively;
One energy storage device is electrically connected with said stand-by power supply, one second circuit breaker and an energy conservation device respectively;
One energy conservation device is electrically connected with said stand-by power supply, said energy storage device, said second circuit breaker, one the 6th circuit breaker, one the 7th circuit breaker, one the 8th circuit breaker, first distributed power source, second distributed power source and the 3rd distributed power source respectively;
One first circuit breaker is connected with said stand-by power supply, a common bus and said second circuit breaker electric respectively;
One second circuit breaker is electrically connected with said energy storage device, said energy conservation device, said first circuit breaker and said common bus respectively;
One common bus is connected with said first circuit breaker, said second circuit breaker, said the 3rd circuit breaker, said the 4th circuit breaker and said the 5th circuit breaker electric respectively;
One the 3rd circuit breaker is electrically connected with said common bus, said the 6th circuit breaker and said first distributed power source respectively;
One the 4th circuit breaker is electrically connected with said common bus, said the 7th circuit breaker and said second distributed power source respectively;
One the 5th circuit breaker is electrically connected with said common bus, said the 8th circuit breaker and said the 3rd distributed power source respectively;
One the 6th circuit breaker is electrically connected with said the 3rd circuit breaker, said first distributed power source, said energy conservation device and one first load respectively;
One the 7th circuit breaker is electrically connected with said the 4th circuit breaker, said second distributed power source, said energy conservation device and one second load respectively;
One the 8th circuit breaker is electrically connected with said the 5th circuit breaker, said the 3rd distributed power source, said energy conservation device and one the 3rd load respectively;
First distributed power source is electrically connected with said the 3rd circuit breaker, said the 6th circuit breaker and said energy conservation device respectively;
Second distributed power source is electrically connected with said the 4th circuit breaker, said the 7th circuit breaker and said energy conservation device respectively;
The 3rd distributed power source is electrically connected with said the 5th circuit breaker, said the 8th circuit breaker and said energy conservation device respectively;
One first load is connected with said the 6th circuit breaker electric;
One second load is connected with said the 7th circuit breaker electric;
One the 3rd load is connected with said the 8th circuit breaker electric.
2. a kind of distributed power grid as claimed in claim 1 system is characterized in that said first distributed power source is one or more distributed power sources.
3. a kind of distributed power grid as claimed in claim 2 system is characterized in that, when said first distributed power source was a plurality of distributed power source, a plurality of first distributed power sources were connected in parallel with each other.
4. a kind of distributed power grid as claimed in claim 1 system is characterized in that said second distributed power source is one or more distributed power sources.
5. a kind of distributed power grid as claimed in claim 4 system is characterized in that, when said second distributed power source was a plurality of distributed power source, a plurality of second distributed power sources were connected in parallel with each other.
6. a kind of distributed power grid as claimed in claim 1 system is characterized in that said the 3rd distributed power source is one or more distributed power sources.
7. a kind of distributed power grid as claimed in claim 6 system is characterized in that, when said the 3rd distributed power source was a plurality of distributed power source, a plurality of the 3rd distributed power sources were connected in parallel with each other.
8. a kind of distributed power grid as claimed in claim 1 system is characterized in that described stand-by power supply adopts the fuel power supply.
9. a kind of distributed power grid as claimed in claim 1 system is characterized in that described energy storage device comprises super capacitor or ultrahigh speed flywheel.
10. a kind of distributed power grid as claimed in claim 1 system is characterized in that described energy conservation device comprises several power electronic device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220181957 CN202633970U (en) | 2012-04-26 | 2012-04-26 | Distributed power grid system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220181957 CN202633970U (en) | 2012-04-26 | 2012-04-26 | Distributed power grid system |
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| Publication Number | Publication Date |
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| CN202633970U true CN202633970U (en) | 2012-12-26 |
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| CN 201220181957 Expired - Fee Related CN202633970U (en) | 2012-04-26 | 2012-04-26 | Distributed power grid system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151802A (en) * | 2013-02-06 | 2013-06-12 | 上海交通大学 | Coordinated control system and method for DG (Differential Gain) of multi-time scale active power distribution network |
| US9620960B2 (en) | 2014-01-13 | 2017-04-11 | Abb Schweiz Ag | Control of a stabilizing energy storage in a microgrid |
| CN112531878A (en) * | 2020-11-30 | 2021-03-19 | 深圳市皓文电子有限公司 | Redundant power supply and method for realizing redundant power supply on redundant power supply |
-
2012
- 2012-04-26 CN CN 201220181957 patent/CN202633970U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103151802A (en) * | 2013-02-06 | 2013-06-12 | 上海交通大学 | Coordinated control system and method for DG (Differential Gain) of multi-time scale active power distribution network |
| CN103151802B (en) * | 2013-02-06 | 2015-07-01 | 上海交通大学 | Coordinated control system and method for DG (Differential Gain) of multi-time scale active power distribution network |
| US9620960B2 (en) | 2014-01-13 | 2017-04-11 | Abb Schweiz Ag | Control of a stabilizing energy storage in a microgrid |
| CN112531878A (en) * | 2020-11-30 | 2021-03-19 | 深圳市皓文电子有限公司 | Redundant power supply and method for realizing redundant power supply on redundant power supply |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121226 Termination date: 20150426 |
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| EXPY | Termination of patent right or utility model |