CN102315645B - Energy router for distributed power generation - Google Patents
Energy router for distributed power generation Download PDFInfo
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- CN102315645B CN102315645B CN201110268090.9A CN201110268090A CN102315645B CN 102315645 B CN102315645 B CN 102315645B CN 201110268090 A CN201110268090 A CN 201110268090A CN 102315645 B CN102315645 B CN 102315645B
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- 238000010248 power generation Methods 0.000 title claims abstract description 36
- 238000004146 energy storage Methods 0.000 claims abstract description 32
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- PLUBXMRUUVWRLT-UHFFFAOYSA-N Ethyl methanesulfonate Chemical compound CCOS(C)(=O)=O PLUBXMRUUVWRLT-UHFFFAOYSA-N 0.000 claims 8
- 230000006855 networking Effects 0.000 abstract description 2
- 229910018095 Ni-MH Inorganic materials 0.000 description 3
- 229910018477 Ni—MH Inorganic materials 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 3
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- 238000005516 engineering process Methods 0.000 description 3
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
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- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses an energy router for distributed power generation, which comprises a plurality of controllable switches, a current converter (4), an energy storage unit (3), a power frequency alternating current bus (12), an energy management system (13) and a static switch (14), wherein the controllable switches are connected onto the power frequency alternating current bus (12); the energy storage unit (3) is connected to the input side of the current converter (4); the output side of the current converter (4) is connected onto the controllable switches; one end of the static switch (14) is connected onto the power frequency alternating current bus (12); and the other end of the static switch (14) is connected to a public supply network (15). The energy management system (13) is connected with the controllable switches, the current converter (4) and the static switch (14) through an Ethernet. The energy management system provides a networking scheme, a stable control means and a load management strategy, so that the stable controllable alternating current electric energy is outputted after various instable power supplies are connected to the energy router.
Description
Technical field
The present invention relates to a kind of energy router, particularly a kind of energy router that multiple distributed power generation power supply is coordinated and controlled.
Background technology
Because the drawback of traditional centrally connected power supply pattern shows especially day by day, distributed generation technology obtains swift and violent development.Distributed power generation has flexibly, disperse, small-sized, near the feature of user and reasonable employment clean energy resource, local power reliability can be improved, reduce transmission losses, improve the utilization rate of primary energy and reduce toxic emission, there is good application prospect.Along with the raising of distributed generation technology level, updating of various burning natural gas distributed power apparatus performance and improving constantly of efficiency, the range of application of distributed power generation constantly expands, and can cover multiple places such as comprising office building, hotel, restaurant, school, hospital, welfare home, stadiums.How better to utilize the research topic that distributed power generation power supply has become important.
Document " A single phase high frequency AC microgrid with an unified power quality conditioner " (Energy Conversion, IEEE Transactions on Volume:24, Issue:3) the high frequency microgrid mentioned in runs on high-frequency bus containing one, all distributed power sources and energy storage device access hf bus, then power to load.High frequency microgrid, owing to operating in upper frequency, can make device miniaturization, reduces harmonic effects.But the successful Application of high frequency microgrid must depend on the Optimum utilization to the energy and hf bus, this just needs to use power quality adjuster to realize this function, adds the complexity of network.
Disclose a kind of networking method for minitype electric network at Chinese patent CN101436778A, the method adopts DC bus structure, and each generator unit and load are all received on dc bus, are connected to distribution time grid-connected by combining inverter.But direct-current micro-grid needs to be realized by combining inverter grid-connected, and the capacity extension flexibility of microgrid is subject to the restriction of combining inverter.
A kind of wind, light, bavin complementary system control conversion integrated machine is disclosed at Chinese patent CN2723723Y, this device is a kind of complementary system solar energy, wind-driven generator and diesel-driven generator combined, the clean energy resourcies such as preferential use solar energy and wind energy, and can accumulator cell charging and discharging be controlled.But this system is an off-grid system, can only local load supplying be given, can not be incorporated into the power networks.
Summary of the invention
The object of the invention is to the problem such as intermittence for distributed power generation especially regenerative resource distributed power generation, propose a kind of energy router for distributed power generation.The present invention can utilize distributed power generation power supply more fully, easily, each distributed power generation power supply, energy-storage units are all received on the industrial frequency AC bus of energy router, not only can power to the common load of this locality and important load, but also can to public electric wire net transmission of electric energy.
The present invention is used for the energy router of distributed power generation, comprises gate-controlled switch, current transformer, industrial frequency AC bus, EMS and static switch.Gate-controlled switch is directly received on industrial frequency AC bus.The input side joint energy-storage units of current transformer, the outlet side of current transformer is received on gate-controlled switch.One end of static switch is received on industrial frequency AC bus, and the other end is connected to public electric wire net.EMS is connected with static switch with gate-controlled switch, current transformer by Ethernet.
Energy router of the present invention provides plug and play interface, to the access of distributed power generation power supply without the need to special engineering requirement.For distributed power generation power supply, no matter be unstable power supply or stabilized power source, it exports the industrial frequency AC being unified standard.Unstable power supply and stabilized power source are directly received on the industrial frequency AC bus of energy router.Energy-storage units is received on the industrial frequency AC bus of energy router by power converter, and important load and common load are directly received on the industrial frequency AC bus of energy router, and the industrial frequency AC bus of energy router is connected to public electric wire net by static switch.Each distributed power generation power supply and energy-storage units can carry out United Dispatching and control by the EMS of energy router, thus can ensure efficient, the safety and stability of distributed power generation power supply.
The unstable power supply that the present invention relates to can be but be not limited to the renewable energy power generation such as photovoltaic generation unit, wind power generation unit mode.
The stabilized power source that the present invention relates to can be but be not limited to the conventional Power Generation Modes such as gas turbine, gas internal-combustion engine, miniature gas turbine, diesel-driven generator.
The outside energy-storage units that the present invention relates to can be but be not limited to the batteries of lithium battery, Ni-MH battery, nickel-cadmium cell, lead-acid battery, sodium-sulphur battery, flow battery, flywheel energy storage, ultracapacitor or fuel cell composition.
The internal power storage unit that the present invention relates to can be but be not limited to the batteries of lithium battery, Ni-MH battery, nickel-cadmium cell, lead-acid battery, sodium-sulphur battery, flow battery, flywheel energy storage, ultracapacitor or fuel cell composition.
The power converter that the present invention relates to comprises DC/AC current transformer and DC/DC/AC current transformer.
The static switch that the present invention relates to can be but be not limited to SCR, GTR, IGBT, IGCT, GTO, STS etc.
The present invention is used for the energy router of distributed power generation, its creativeness is by energy storage and EMS, organically integrate various intermittent distributed power generation power supply, the trend at energy router and public electric wire net place is made to have certain observability and controllability, compared with fitful power direct grid-connected, energy router can become " close friend " unit in public electric wire net, efficiently solves the problem of large number of intermittently formula distributed power generation plant-grid connection electrical network.Particularly, when energy router is incorporated into the power networks, the various distributed power source of Real-Time Monitoring, especially the generated output situation of fitful power, and the running status of load, by the charge and discharge control of energy storage, make the trend at the points of common connection place between energy router and public electric wire net within the regular hour, remain level and smooth; When energy router is from network operation, according to the state of generating, load, energy storage in energy storage and EMS, controlled by distributed power source Generation Control, spatial load forecasting and accumulator cell charging and discharging, realize the optimizing operation of micro power network system.Meanwhile, by seamless link and the load management of energy router and public electric wire net, the power supply of high reliability can also be provided for important load.
In addition, the energy router for distributed power generation of the present invention also has the following advantages:
(1) can integrate various different distributed power generation form, access is simple, can realize hot plug.
(2) energy router be incorporated into the power networks simple, only need control static switch and can realize being incorporated into the power networks and the seamless switching of islet operation.
(3) EMS of energy router can carry out unified management and control to distributed power generation power supply, energy-storage units and load.
Energy router for distributed power generation can integrate the distributed power generation power supply of multiple multi-form and performance, access is simple, hot plug can be realized, power to local load, also can to public electric wire net conveying capacity, can be widely used in as family, holiday village, industrial park, and the government utility place such as school, hospital.
Accompanying drawing explanation
Fig. 1 is the micro power network system structural representation be made up of energy router, distributed power generation power supply, energy-storage units and load.
Detailed description of the invention
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
The micro power network system structural representation be made up of energy router 100, distributed power generation power supply, energy-storage units 4, common load 5 and important load 6 shown in Fig. 1.Wherein said distributed power source comprises unstable power supply 1 and stabilized power source 2.
As shown in Figure 1, the energy router 100 for distributed power generation comprises gate-controlled switch 7 ~ 11, current transformer 4, energy-storage units 3, industrial frequency AC bus 12, EMS 13 and static switch 14.
One end of first gate-controlled switch 7 is connected with unstable power supply 1, and the other end of the first gate-controlled switch 7 is connected with industrial frequency AC bus 12; One end of second gate-controlled switch 8 is connected with stabilized power source 2, and the other end of the second gate-controlled switch 8 is connected with industrial frequency AC bus 12; One end of 3rd gate-controlled switch 9 is connected with the outlet side of current transformer 4, and the other end of the 3rd gate-controlled switch 9 is connected with industrial frequency AC bus 12; The input side of current transformer 4 is connected with energy-storage units 3; One end of 4th gate-controlled switch 10 is connected with common load 5, and the other end of the 4th gate-controlled switch 10 is connected with industrial frequency AC bus 12; One end of 5th gate-controlled switch 11 is connected with important load 6, and the other end of the 5th gate-controlled switch 11 is connected with industrial frequency AC bus 12; EMS 13 is connected by Ethernet and first, second, third, fourth, the 5th gate-controlled switch 7 ~ 11, current transformer 4 and static switch 14.One end of static switch 14 is connected with industrial frequency AC bus 12, and the other end of static switch 14 is connected with public electric wire net 15.
Unstable power supply 1, as wind power generation unit, be connected with the industrial frequency AC bus 12 of energy router 100 by the first gate-controlled switch 7, by the scheduling and controlling of EMS 13, EMS 13 is according to the operation conditions of energy router 100, control start and stop and the running status of unstable power supply 1, make its capacity factor high as far as possible.
Stabilized power source 2, as micro combustion steam turbine, internal combustion engine, diesel-driven generator, is connected with the industrial frequency AC bus 12 of energy router 100 by the second gate-controlled switch 8.EMS 13, according to the operation conditions of distributed power generation power supply, energy-storage units 3, controls the start and stop of stabilized power source 2.
Energy-storage units 3, as the batteries of lithium ion battery, Ni-MH battery, nickel-cadmium cell, lead-acid battery or fuel cell composition, or as the bank of super capacitors of double electric layers supercapacitor or electric chemical super capacitor composition, for improving power quality problem in energy router 100 and maintaining the stable of industrial frequency AC bus 12 voltage.EMS 13 controls energy-storage units 3 and exports energy by current transformer 4 and the 3rd gate-controlled switch 9, for keeping the stable of industrial frequency AC bus 12 voltage of energy router 100.When the unstable power supply generating being connected to energy router 100 is more, and when energy router 100 can not be incorporated into the power networks, EMS 13 controls power converter 4 and works, and makes unnecessary electrical power storage in energy-storage units 3.
Common load 5 is connected with the industrial frequency AC bus 12 of energy router 100 with the 5th gate-controlled switch 11 respectively by the 4th gate-controlled switch 10 with important load 6.
When energy router 100 is from network operation, described stabilized power source 2 or energy-storage units 3 are operated in voltage source mode, the electric voltage frequency reference of energy router 100 is provided, EMS 13 detects in real time and controls each unit and exports, and the voltage/frequency exported to maintain energy router 100 is stablized; When energy router 100 needs to be incorporated into the power networks, industrial frequency AC bus 12 voltage of EMS 13 detected energy router one 00 and the amplitude of electrical network 15 voltage and frequency, when reaching grid-connected conditions, controlling static switch 14 conducting, making energy router one 00 to public electric wire net 15 conveying capacity.Under now stabilized power source 2 or energy-storage units 3 are operated in current source mode, public electric wire net 15 provides the reference of the electric voltage frequency in energy router 100.
When energy router 100 is incorporated into the power networks, if public electric wire net 15 breaks down, EMS 13 controls static switch 14 and turns off, and energy router 100 is from network operation, and preferential guarantee is powered to important load 6; When public electric wire net 15 recovers normal, the voltage of EMS 13 adjusting energy router one 00 and frequency, to setting value, then control static switch 14 and close, and guarantee and network process level and smooth.
Claims (1)
1. for an energy router for distributed power generation, it is characterized in that: described energy router (100) comprises multiple gate-controlled switch, current transformer (4), energy-storage units (3), industrial frequency AC bus (12), EMS (13) and static switch (14); Gate-controlled switch is connected on industrial frequency AC bus (12); Energy-storage units (3) receives the input side of current transformer, and the outlet side of current transformer is received on gate-controlled switch; One end of static switch (14) is received on industrial frequency AC bus (12), and the other end of static switch (14) is connected to public electric wire net (15); EMS (13) is connected with static switch (14) with gate-controlled switch, current transformer (4) by Ethernet; Described energy router (100) provides plug and play interface, to the access of distributed power generation power supply without special engineering requirement; Described energy router (100) detects the state of unstable power supply (1), stabilized power source (2), public electric wire net (15), common load (5) and important load (6), control and coordinate the power division between each power generating source, controlling output voltage level and the stabilized frequency of energy router (100); The state of the distributed power generation power supply of energy router (100) of energy router (100) according to access, energy-storage units (3), common load (5) and important load (6), by controlling to the charge and discharge control of energy-storage units (3) and EMS (13) common load (5) and important load (6) and dispatch; Described energy router (100) has warm connection function;
Described gate-controlled switch comprises the first gate-controlled switch (7), the second gate-controlled switch (8), the 3rd gate-controlled switch (9), the 4th gate-controlled switch (10) and the 5th gate-controlled switch (11); One end of first gate-controlled switch (7) is connected with unstable power supply (1), and the other end of the first gate-controlled switch (7) is connected with industrial frequency AC bus (12); One end of second gate-controlled switch (8) is connected with stabilized power source (2), and the other end of the second gate-controlled switch (8) is connected with industrial frequency AC bus (12); One end of 3rd gate-controlled switch (9) is connected with the outlet side of current transformer (4), and the other end of the 3rd gate-controlled switch (9) is connected with industrial frequency AC bus (12); The input side of current transformer (4) is connected with energy-storage units (3); One end of 4th gate-controlled switch (10) is connected with common load (5), and the other end of the 4th gate-controlled switch (10) is connected with industrial frequency AC bus (12); One end of 5th gate-controlled switch (11) is connected with important load (6), and the other end of the 5th gate-controlled switch (11) is connected with industrial frequency AC bus (12); EMS (13) is connected with the first gate-controlled switch (7), the second gate-controlled switch (8), the 3rd gate-controlled switch (9), the 4th gate-controlled switch (10) and the 5th gate-controlled switch (11), current transformer (4) and static switch (14) by Ethernet; One end of static switch (14) is connected with industrial frequency AC bus (12), and the other end of static switch (14) is connected with public electric wire net (15);
In described energy router (100), unstable power supply (1) and stabilized power source (2) are connected on described industrial frequency AC bus (12) respectively by the first gate-controlled switch (7) and the second gate-controlled switch (8); Energy-storage units (3) is received on industrial frequency AC bus (12) by current transformer (4) and the 3rd gate-controlled switch (9); Important load (6) and common load (5) are received on industrial frequency AC bus (12) respectively by the 5th gate-controlled switch (11) and the 4th gate-controlled switch (10); Industrial frequency AC bus (12) is connected to public electric wire net (15) by static switch (14);
When energy router (100) is from network operation, described stabilized power source (2) or energy-storage units (3) provide the electric voltage frequency reference of energy router (100), EMS (13) detects in real time and controls each unit and exports, and the voltage/frequency exported to maintain energy router (100) is stablized; When energy router (100) is incorporated into the power networks, public electric wire net (15) provides the electric voltage frequency reference in energy router (100), EMS (13) detects in real time and regulates the state of unstable power supply (1), stabilized power source (2), public electric wire net (15), common load (5) and important load (6), makes trend between energy router (100) and public electric wire net (15) reach the state of setting;
When energy router (100) is incorporated into the power networks, if public electric wire net (15) breaks down, EMS (13) controls static switch (14) and turns off, realize grid-connected to off-grid seamless switching, energy router (100) is from network operation, and preferential guarantee is powered to important load (6); When public electric wire net (15) recovers normal, the voltage of EMS (13) adjusting energy router (100) and frequency are to setting value, then control static switch (14) to close, realize from net to grid-connected seamless switching, guarantee the level and smooth of also network process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110268090.9A CN102315645B (en) | 2011-09-09 | 2011-09-09 | Energy router for distributed power generation |
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| CN201110268090.9A CN102315645B (en) | 2011-09-09 | 2011-09-09 | Energy router for distributed power generation |
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| CN102315645A CN102315645A (en) | 2012-01-11 |
| CN102315645B true CN102315645B (en) | 2015-04-29 |
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| CN102664410A (en) * | 2012-05-29 | 2012-09-12 | 国电联合动力技术有限公司 | Novel energy output analog application system |
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| CN102780230B (en) * | 2012-07-09 | 2015-06-03 | 中国科学院电工研究所 | Flywheel array energy storage system with multiple parallel-connected flywheel energy storage units |
| CN102751719B (en) * | 2012-07-09 | 2014-09-10 | 中国科学院电工研究所 | Flywheel array energy storage system with flywheel energy storage units connected in parallel |
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| CN103219726A (en) * | 2013-03-29 | 2013-07-24 | 浙江大学 | Microgrid topology structure based on energy storage |
| KR20150071626A (en) * | 2013-12-18 | 2015-06-26 | 대우조선해양 주식회사 | Apparatus and method for hybrid power supply in offshore plant |
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| CN109904860B (en) * | 2017-12-07 | 2020-09-29 | 清华大学 | Hot-plug power balance control method and system in energy router |
| CN109038678A (en) * | 2018-09-18 | 2018-12-18 | 国家能源投资集团有限责任公司 | Garden distributed energy intelligence managing and control system based on big data |
| CN109659946A (en) * | 2019-01-08 | 2019-04-19 | 广东电网有限责任公司 | A kind of distribution end Electric power route deivce topology and its control method |
| CN110011304B (en) * | 2019-04-15 | 2023-01-03 | 国网山西省电力公司大同供电公司 | Self-optimization routing system for switch networking planning |
| CN110829507B (en) * | 2019-11-22 | 2021-06-18 | 湖南大学 | Power supply method of island special energy router |
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