CN102315645A - Energy router for distributed power generation - Google Patents
Energy router for distributed power generation Download PDFInfo
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- CN102315645A CN102315645A CN201110268090A CN201110268090A CN102315645A CN 102315645 A CN102315645 A CN 102315645A CN 201110268090 A CN201110268090 A CN 201110268090A CN 201110268090 A CN201110268090 A CN 201110268090A CN 102315645 A CN102315645 A CN 102315645A
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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, the distributed power generation technology has obtained swift and violent development.Distributed power generation has flexibly, dispersion, small-sized, near the user with rationally use the characteristics of clean energy resource, can improve the local power reliability, reduce transmission losses, improve the utilance of primary energy and reduce toxic emission, have good application prospects.Raising along with the distributed power generation technical merit; Updating of various burning natural gas distributed power apparatus performances and improving constantly of efficient; The range of application of distributed power generation constantly enlarges, and can cover multiple places such as comprising office building, hotel, restaurant, school, hospital, welfare home, stadiums.How better utilization distributed power generation power supply has become important research project.
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 of mentioning in is to contain one to run on high-frequency bus; All distributed power sources and energy storage device insert hf bus, then to the load power supply.The high frequency microgrid can make device miniaturization owing to operate in upper frequency, reduces harmonic effects.But the successful Application of high frequency microgrid must depend on the optimization utilization to the energy and hf bus, and this just needs the electrification quality adjustor to realize this function, has increased the complexity of network.
Disclose a kind of networking method for minitype electric network at Chinese patent CN101436778A, this method is to adopt the dc bus structure, and each generator unit is all received on the dc bus with load, is connected to distribution through combining inverter when being incorporated into the power networks.But the direct current microgrid need be realized being incorporated into the power networks through combining inverter, and the capacity extension flexibility of microgrid receives the restriction of combining inverter.
A kind of wind, light, bavin complementary system control inversion all-in-one are disclosed at Chinese patent CN2723723Y; This device is a kind of complementary system that solar energy, wind-driven generator and diesel engine generator are combined; Clean energy resourcies such as preferential use solar energy and wind energy, and can control accumulator cell charging and discharging.Can only give local electric but this system is one from the net system, can not be incorporated into the power networks.
Summary of the invention
The objective of the invention is to propose a kind of energy router that is used for distributed power generation to the distributed power generation especially problems such as intermittence of regenerative resource distributed power generation.The present invention can utilize the 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 supply power to the common load and the important load of this locality, but also can be to the 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 the industrial frequency AC bus.The input side joint energy-storage units of current transformer, the outlet side of current transformer is received on the gate-controlled switch.One of static switch terminates on the industrial frequency AC bus, and the other end is connected to public electric wire net.EMS links to each other with gate-controlled switch, current transformer and static switch through Ethernet.
Energy router of the present invention provides the plug and play interface, and the access of distributed power generation power supply need not the special engineering requirement.For the distributed power generation power supply, no matter be unstable power supply or stabilized power supply, its output is the industrial frequency AC of unified standard.Unstable power supply and stabilized power supply are directly received on the industrial frequency AC bus of energy router.Energy-storage units is received through power converter on the industrial frequency AC bus of energy router, 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 through static switch.Each distributed power generation power supply and energy-storage units can carry out uniform dispatching and control by the EMS of energy router, thereby can guarantee efficient, the safety and the stable operation of distributed power generation power supply.
The unstable power supply that the present invention relates to can be but be not limited to renewable energy power generation modes such as photovoltaic generation unit, wind power generation unit.
The stabilized power supply that the present invention relates to can be but be not limited to traditional generation modes such as gas turbine, gas internal-combustion engine, miniature gas turbine, diesel engine generator.
The outside energy-storage units that the present invention relates to can be but be not limited to the batteries that lithium battery, Ni-MH battery, nickel-cadmium cell, lead-acid battery, sodium-sulphur battery, flow battery, flywheel energy storage, ultracapacitor or fuel cell are formed.
The internal power storage unit that the present invention relates to can be but be not limited to the batteries that lithium battery, Ni-MH battery, nickel-cadmium cell, lead-acid battery, sodium-sulphur battery, flow battery, flywheel energy storage, ultracapacitor or fuel cell are formed.
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 through energy storage and EMS; Organically integrate various intermittent distributed power generation power supplys, make the trend at energy router and public electric wire net place have certain observability and controllability, directly be incorporated into the power networks with fitful power and compare; The energy router can become " close friend " unit in the public electric wire net, efficiently solves the problem that large number of intermittently formula distributed power generation power supply inserts electrical network.Particularly; When the energy router is incorporated into the power networks; The generated output situation of monitoring various distributed power sources, especially fitful power, and the running status of load in real time; Through the control that discharges and recharges of energy storage, the trend at the points of common connection place between energy router and the public electric wire net is kept smoothly in the regular hour; When the energy router leaves network operation,,, realize that the optimization of micro power network system moves through distributed power source Generation Control, load control and accumulator cell charging and discharging control according to the state of generating in energy storage and the EMS, load, energy storage.Simultaneously, through the 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 that is used for distributed power generation of the present invention also has the following advantages:
(1) can integrate various distributed power generation form, insert simply, can realize hot plug.
(2) the energy router be incorporated into the power networks simply, only need the control static switch seamless switching with islet operation of can realizing being incorporated into the power networks.
(3) EMS of energy router can carry out unified management and control to distributed power generation power supply, energy-storage units and load.
The energy router that is used for distributed power generation can be integrated the distributed power generation power supply of multiple multi-form and performance; Insert simple; Hot plug can be realized, local load power supply can either be given, also can be to the public electric wire net conveying capacity; Can be widely used in like family, holiday village, industrial park, and government utility place such as school, hospital.
Description of drawings
Fig. 1 is the micro power network system structural representation of being made up of energy router, distributed power generation power supply, energy-storage units and load.
Embodiment
Further specify the present invention below in conjunction with accompanying drawing and embodiment.
The micro power network system structural representation of forming by energy router one 00, distributed power generation power supply, energy-storage units 4, common load 5 and important load 6 shown in Figure 1.Wherein said distributed power source comprises unstable power supply 1 and stabilized power supply 2.
As shown in Figure 1, the energy router one 00 that is used 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 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 supply 2, and the other end of second gate-controlled switch 8 is connected with industrial frequency AC bus 12; One end of the 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 the 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 the 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 static switch 14 through Ethernet and first, second, third, fourth, the 5th gate-controlled switch 7～11, current transformer 4.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; Like the wind power generation unit; Link to each other with the industrial frequency AC bus 12 of energy router one 00 through first gate-controlled switch 7, receive the scheduling and the control of EMS 13, EMS 13 is according to the operation conditions of energy router one 00; Control the start and stop and the running status of unstable power supply 1, make its capacity factor high as far as possible.
Stabilized power supply 2 like micro combustion steam turbine, internal combustion engine, diesel engine generator, links to each other with the industrial frequency AC bus 12 of energy router one 00 through second gate-controlled switch 8.EMS 13 is according to the operation conditions of distributed power generation power supply, energy-storage units 3, the start and stop of control stabilization power supply 2.
Energy-storage units 3; Batteries like lithium ion battery, Ni-MH battery, nickel-cadmium cell, lead-acid battery or fuel cell composition; Perhaps, be used to improve the power quality problem in the energy router one 00 and keep the stable of industrial frequency AC bus 12 voltages like the bank of super capacitors of double electric layers supercapacitor or electric chemical super capacitor composition.EMS 13 control energy-storage units 3 are through current transformer 4 and the 3rd gate-controlled switch 9 output energy, are used to keep the stablizing of industrial frequency AC bus 12 voltages of energy router one 00.More when the unstable power supply generating that is connected to energy router one 00, and energy router one 00 be can not be incorporated into the power networks the time, and 4 work of EMS 13 power controlling current transformers make unnecessary electrical power storage in energy-storage units 3.
When energy router one 00 leaves network operation; Described stabilized power supply 2 or energy-storage units 3 are operated in voltage source mode; The electric voltage frequency reference of energy router one 00 is provided; EMS 13 detects and control each unit output in real time, and is stable with the voltage/frequency of keeping 00 output of energy router one; When energy router one 00 need be incorporated into the power networks; Industrial frequency AC bus 12 voltages of EMS 13 detected energy router ones 00 and the amplitude and the frequency of electrical network 15 voltages; When reaching when being incorporated into the power networks condition, 14 conductings of control static switch make energy router one 00 to public electric wire net 15 conveying capacities.This moment, stabilized power supply 2 or energy-storage units 3 were operated under the current source pattern, and public electric wire net 15 provides the electric voltage frequency reference in the energy router one 00.
When energy router one 00 was incorporated into the power networks, if public electric wire net 15 breaks down, EMS 13 control static switches 14 turn-offed, and energy router one 00 preferentially guarantees important load 6 power supplies from network operation; When public electric wire net 15 recovers just often, the voltage that EMS 13 is regulated energy router ones 00 and frequency are controlled static switch 14 closures then to set point, guarantee and network process smoothly.
Claims (6)
1. energy router that is used for distributed power generation, it is characterized in that: described energy router (100) comprises a plurality of gate-controlled switches, current transformer (4), energy-storage units (3), industrial frequency AC bus (12), EMS (13) and static switch (14); Gate-controlled switch is connected on the industrial frequency AC bus (12); Energy-storage units (3) is received the input side of current transformer, and the outlet side of current transformer is received on the gate-controlled switch; One of static switch (14) terminates on the industrial frequency AC bus (12), and the other end of static switch (14) is connected to public electric wire net (15); EMS (13) links to each other with gate-controlled switch, current transformer (4) and static switch (14) through Ethernet.
2. the energy router that is used for distributed power generation according to claim 1 is characterized in that: described gate-controlled switch comprises first gate-controlled switch (7), 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 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 supply (2), and the other end of second gate-controlled switch (8) is connected with industrial frequency AC bus (12); One end of the 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 the 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 the 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 first gate-controlled switch (7), 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) through 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).
3. the energy router that is used for distributed power generation according to claim 1; It is characterized in that: in the described energy router (100), unstable power supply (1) and stabilized power supply (2) are connected on the described industrial frequency AC bus (12) through first gate-controlled switch (7) and second gate-controlled switch (8) respectively; Energy-storage units (3) is received on the industrial frequency AC bus (12) through current transformer (4) and the 3rd gate-controlled switch (9); Important load (6) and common load (5) are received on the industrial frequency AC bus (12) through the 5th gate-controlled switch (11) and the 4th gate-controlled switch (10) respectively; Industrial frequency AC bus (12) is connected to public electric wire net (15) through static switch (14).
4. the energy router (100) that is used for distributed power generation according to claim 1 and 2; It is characterized in that: described energy router (100) detects the state of unstable power supply (1), stabilized power supply (2), public electric wire net (15), common load (5) and important load (6); Control and the power division between power supply of coordinating respectively to generate electricity, the output voltage level and the stabilized frequency of control energy router (100).
5. the energy router (100) that is used for distributed power generation according to claim 1 and 2; It is characterized in that: when energy router (100) leaves network operation; Described stabilized power supply (2) or energy-storage units (3) provide the electric voltage frequency reference of energy router (100); EMS (13) detects and control each unit output in real time, and is stable with the voltage/frequency of keeping energy router (100) output; When energy router (100) when being incorporated into the power networks; Public electric wire net (15) provides the electric voltage frequency reference in the energy router (100); EMS (13) detects and regulates the state of unstable power supply (1), stabilized power supply (2), public electric wire net (15), load (5) and load (6) in real time, makes trend between energy router (100) and the public electric wire net (15) reach the state of setting.
6. the energy router (100) that is used for distributed power generation according to claim 1 and 2; It is characterized in that: when energy router (100) when being incorporated into the power networks; If public electric wire net (15) breaks down; EMS (13) control static switch (14) turn-offs, and energy router (100) is from network operation, and preferential the assurance supplied power to important load (6); When public electric wire net (15) recovers just often, the voltage that EMS (13) is regulated energy router (100) and frequency are controlled static switch (14) closure then to set point, guarantee and network process smoothly.
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| CN106803672A (en) * | 2016-12-06 | 2017-06-06 | 上海电力学院 | The energy source router and control strategy of family type energy LAN |
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| CN109904860A (en) * | 2017-12-07 | 2019-06-18 | 清华大学 | Hot-Plug Power balance control method and system in a kind of energy router |
| CN109904860B (en) * | 2017-12-07 | 2020-09-29 | 清华大学 | Hot-plug power balance control method and system in energy router |
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| 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 |
| CN110829507A (en) * | 2019-11-22 | 2020-02-21 | 湖南大学 | Power supply method of island special energy router |
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| CN111934570B (en) * | 2020-09-29 | 2021-01-19 | 国网（天津）综合能源服务有限公司 | Fault tolerance control method for cascaded H-bridge type optical storage hybrid energy router |
| WO2024055307A1 (en) * | 2022-09-16 | 2024-03-21 | 中国电力科学研究院有限公司 | Microgrid system, control method therefor, device, storage medium and program product |
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