CN114400707A - Method based on direct-current power supply and matched high-voltage transmission and flexible direct-current power distribution - Google Patents

Method based on direct-current power supply and matched high-voltage transmission and flexible direct-current power distribution Download PDF

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Publication number
CN114400707A
CN114400707A CN202210117021.6A CN202210117021A CN114400707A CN 114400707 A CN114400707 A CN 114400707A CN 202210117021 A CN202210117021 A CN 202210117021A CN 114400707 A CN114400707 A CN 114400707A
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China
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voltage
power
energy
grid
electric energy
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CN202210117021.6A
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Chinese (zh)
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不公告发明人
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Hubei Guanghe Energy Co ltd
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Hubei Guanghe Energy Co ltd
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Priority to CN202210117021.6A priority Critical patent/CN114400707A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/50—Photovoltaic [PV] energy
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Abstract

A method based on a direct current power supply and matched high-voltage transmission and flexible direct current distribution is characterized in that a photovoltaic power supply and a wind power generation power supply are connected into a multi-energy complementary convergence controller (1), the multi-energy complementary convergence controller (1) distributes the direct current power supply to a digital relay protection cabinet (3) and an energy management matrix machine (4), the energy management matrix machine (4) receives and sends prediction control information according to time sequence, transmits control instructions including report voltage, current, temperature and insulation data information to the digital relay protection cabinet (3), starts an intelligent vacuum circuit breaker GH2 assembly (18), an M2 driving motor assembly (17) and a high-voltage transmission iron tower mechanism (19), closes a high-voltage transmission iron tower circuit, sends new energy electric energy to a high-voltage transmission protection device (21), further comprises managing and transmitting electric energy operation data, when the load power consumption is less than a predicted value, the command grid-connected control component (34) enables a grid-connected power generation inverter (33) to be connected to a distributed public power grid end (35) for grid-connected power generation, and the method further comprises the step of automatically charging and storing energy to an energy storage battery pack (36) by residual electricity in the grid-connected power generation process.

Description

Method based on direct-current power supply and matched high-voltage transmission and flexible direct-current power distribution
Technical Field
The invention relates to the field of a method for high-voltage transmission and flexible direct-current power distribution based on a direct-current power supply and a matched method for high-voltage transmission and flexible direct-current power distribution, solves the problem of local and remote consumption of photovoltaic and wind power generation, and is suitable for constructing a novel power system for source network load storage in a 100 square kilometer range and with multi-energy complementation of photovoltaic and wind power generation.
Background
At present, the known public power grid power transmission and distribution is an alternating-current 50Hz long-distance power transmission mode and consists of coal power, hydroelectric power and nuclear power. The disadvantages are that: the resources of electric energy can not be regenerated, and the traditional long-distance power transmission has large loss, low utilization rate of a load side and high power distribution and utilization cost. And the new energy consumption depends on the grid-connected power generation of a public power grid, and the new energy consumption is limited due to capacity.
Disclosure of Invention
In order to overcome the defects, the invention provides a method based on a direct-current power supply and matched high-voltage transmission and flexible direct-current power distribution, solves the difficulties of self-use of new energy and source network load storage and consumption in the range of 100 square kilometers of a photovoltaic power generation field and a wind power generation field, is suitable for transmitting the new energy mainly comprising photovoltaic power generation and wind power generation at low cost, enables users to directly consume the new energy, and can also cooperate with an intelligent micro-grid and an incremental distribution network to supply power.
A method based on a direct current power supply and matched high-voltage transmission and flexible direct current power distribution is characterized in that: the photovoltaic power generation and wind power generation power supply is connected into the multi-energy complementary convergence controller, and the multi-energy complementary convergence controller distributes a direct-current power supply to the digital relay protection cabinet and the energy management matrix machine; the energy management matrix machine receives and sends prediction control information according to a time sequence, transmits a control instruction to the digital relay protection cabinet, starts a relevant electromagnetic switch according to the predicted time sequence, charges and stores energy for the storage battery pack in a matrix mode, and simultaneously outputs direct current electric energy to the power supply conversion direct current bus and the DC/AC converter, wherein the energy management matrix machine receives and sends data and electric energy information of a direct current metering sensor, starts the DC/AC converter and the power supply conversion transformer, and outputs 5kV/400Hz alternating electric energy; the alternating electric energy is sent out, the intelligent protection device transmits electric energy data, the intelligent vacuum circuit breaker assembly and the driving motor assembly are started according to time sequence to close the boosting transmission line, and new energy is sent to the high-voltage transmission public end.
A method based on a direct current power supply and matched high-voltage transmission and flexible direct current power distribution is characterized in that: based on 5kV alternating electric energy output by a power supply transformation transformer, the range of 100 square kilometers is transmitted for matched new energy, the line loss is reduced, a transmission autotransformer is adopted to increase the voltage at a matched high-voltage transmission public end, and a high-voltage line lightning protection component is arranged to prevent lightning from invading a transmission system; the high-voltage power transmission protection device and the high-voltage end mutual inductor receive and send electric energy operation data which comprise report voltage, current, temperature and insulation data information, start the intelligent vacuum circuit breaker assembly, the driving motor assembly and the high-voltage power transmission iron tower mechanism, close a line of the high-voltage power transmission iron tower, send out new energy electric energy to the high-voltage power transmission protection device, and execute controllable power transmission operation.
A method based on a direct current power supply and matched high-voltage transmission and flexible direct current power distribution is characterized in that: in order to solve the technical scheme that new energy does not depend on public power grid consumption and is suitable for intelligent micro-power grids and source grid charge storage and consumption electric energy, the new energy is used for supplying power to loads in a range from a power generation field to 100 square kilometers, and the current conversion power distribution and the residual electricity energy storage of the new energy are composed of a driving motor component, an intelligent vacuum circuit breaker component, a high-voltage current conversion transformer and a low-voltage rectification controller; the high-voltage end mutual inductor, the high-voltage power transmission protection device and the low-voltage rectification controller transmit predicted electric energy data to the intelligent vacuum circuit breaker assembly, the driving motor assembly starts a component for closing the intelligent vacuum circuit breaker assembly, and the high-voltage converter transformer is executed to distribute power to the low-voltage rectification controller; the method comprises the steps that a high-voltage converter transformer and a low-voltage rectifier controller output direct-current power to a positive-polarity direct-current bus, a negative-polarity direct-current bus and a bipolar direct-current power public end, a flexible direct-current power distribution electric energy manager distributes power to a load 1 adapter, a load 2 adapter and a load n adapter, electric energy operation data is managed and transmitted, when the load power consumption is lower than a predicted value, a grid-connected control assembly is instructed to connect a grid-connected power generation inverter to a distributed public power grid end for grid-connected power generation, and the method further comprises the step that residual electricity in the grid-connected power generation process automatically charges and stores energy to an energy storage battery pack.
A method based on a direct current power supply and matched high-voltage transmission and flexible direct current power distribution has the advantages that: the problem of dilemma of distributed consumption in the local range of 100 square kilometers of photovoltaic and wind power plants is solved, reliable, flexible and safe power supply of the intelligent micro-grid and the incremental distribution network is supported and cooperated, and a novel power system with photovoltaic and wind power generation power sources as main bodies is constructed by carbon peak-to-peak carbon neutralization.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a circuit diagram of the present invention.
Figure 1. multi-energy complementary bus controller. DC1, DC2, DC3, DCn batteries. 3. Digital relay protection cabinet. 4. An energy management matrix machine. KM1 electromagnetic switch. 6. The power supply converts a direct current bus. KM2 electromagnetic switch. 8. A direct current metering sensor. A DC/AC converter. 10. A power conversion transformer. 11. Intelligent protection device. M1 drive a motor assembly. 13. Intelligent vacuum interrupter GH1 assembly. 14. A high voltage transmission common. 15. A step-up autotransformer for power transmission. 16. High-voltage line lightning protection subassembly. M2 drive a motor assembly. 18. Intelligent vacuum interrupter GH2 assembly. 19. High-voltage power transmission iron tower mechanism. 20. High-voltage end mutual inductor. 21. High-voltage power transmission protection device. M3 drive a motor assembly. 23. Intelligent vacuum interrupter GH3 assembly. 24. A high voltage converter transformer. 25. And a low-voltage rectification controller. 26. A positive polarity dc bus. 27. And a negative polarity DC bus. 28. And a bipolar DC power supply common terminal. 29. Flexible direct current distribution electric energy manager. 30. Load 1 adapter. 31. Load 2 adapter. 32. A load n adapter. 33. Provided is a grid-connected power generation inverter. 34. And (5) a grid-connected control component. 35. Distributed public grid termination. 36. And (4) an energy storage battery pack.
Detailed Description
In the attached drawing, a method based on a direct current power supply and matched high-voltage transmission and flexible direct current distribution is provided, wherein a photovoltaic power supply and a wind power generation power supply are connected into a multi-energy complementary convergence controller 1, the multi-energy complementary convergence controller 1 distributes the direct current power supply to a digital relay protection cabinet 3 and an energy management matrix machine 4, the energy management matrix machine 4 receives and sends prediction control information according to time sequence, transmits a control instruction to the digital relay protection cabinet 3, starts the KM1 electromagnetic switch 5 and the KM2 electromagnetic switch 7 according to the predicted time sequence, charging the DC1, DC2, DC3 and DCn storage battery pack 2 in a matrix mode, tracking and outputting direct current electric energy to a power conversion direct current bus 6 and a DC/AC converter 9, receiving and sending data and electric energy information of a direct current metering sensor 8, starting the DC/AC converter 9 and a power conversion transformer 10, and outputting alternating electric energy of 5kV/400 Hz; the sending of the alternating electric energy is carried out by the intelligent protection device 11 transmitting electric energy data, the intelligent vacuum circuit breaker GH1 assembly 13 and the M1 driving motor assembly 12 are started according to time sequence to close the boosting transmission line, and 5kV alternating electric energy of new energy is sent to the high-voltage transmission public end 14; based on 5kV alternating electric energy output by a power supply transformation transformer 10, a range of 100 square kilometers is transmitted for matched new energy, line loss is reduced, a transmission autotransformer 15 is adopted to increase the output voltage at a matched high-voltage transmission public end 14, and a high-voltage line lightning protection component 16 is arranged to prevent lightning from invading a transmission system; the high-voltage power transmission protection device 21 and the high-voltage end mutual inductor 20 receive and send electric energy operation data including report voltage, current, temperature and insulation data information, start the intelligent vacuum circuit breaker GH2 assembly 18, the M2 driving motor assembly 17 and the high-voltage power transmission iron tower mechanism 19, close a high-voltage power transmission iron tower line, send new energy electric energy to the high-voltage power transmission protection device 21, and execute controllable power transmission operation.
In the attached drawings, a method based on a direct-current power supply and matched high-voltage transmission and flexible direct-current power distribution is provided, which aims to solve the problem that new energy does not depend on public power grid consumption and is suitable for the technical scheme of intelligent micro-power grid and source grid charge storage and consumption electric energy; the new energy is used for supplying power to loads in a range from a power generation field to 100 square kilometers, and the current conversion power distribution and the residual electricity energy storage of the new energy are composed of an M3 driving motor component 22, an intelligent vacuum circuit breaker GH3 component 23, a high-voltage converter transformer 24 and a low-voltage rectification controller 25; the high-voltage end transformer 20, the high-voltage power transmission protection device 21 and the low-voltage rectification controller 25 transmit power data to the intelligent vacuum circuit breaker GH3 assembly 23 according to time sequence prediction, the M3 is instructed to drive the motor assembly 22 to start a component for closing the intelligent vacuum circuit breaker GH3 assembly 23, and the high-voltage converter transformer 24 is executed to distribute power to the low-voltage rectification controller 25; the method is based on a direct-current power supply and matched high-voltage transmission and flexible direct-current power distribution, wherein a high-voltage converter transformer 24 and a low-voltage rectifier controller 25 output direct-current power supplies to a positive-polarity direct-current bus 26, a negative-polarity direct-current bus 27 and a bipolar direct-current power supply common end 28, a flexible direct-current power distribution electric energy manager 29 distributes power to a load 1 adapter 30, a load 2 adapter 31 and a load n adapter 32, and comprises the steps of managing and transmitting electric energy operation data, when the load power consumption is lower than a predicted value, instructing a grid-connected control component 34 to connect a grid-connected power generation inverter 33 to a distributed common power grid end 35 for grid-connected power generation, and automatically charging and storing energy to an energy storage battery pack 36 by residual electricity in the grid-connected power generation process; the method has the advantages of solving the dilemma of implementing distributed consumption in the range of local to 100 square kilometers of photovoltaic and wind power plants, supporting and cooperating the reliable, flexible and safe power supply of the intelligent micro-grid and the incremental distribution network, and adapting to carbon peak-to-peak carbon neutralization to construct a novel power system for source grid charge storage with photovoltaic and wind power generation power sources as main bodies.

Claims (2)

1. A method based on a direct current power supply and matched high-voltage transmission and flexible direct current power distribution is characterized in that: the photovoltaic power and the wind power generation power are connected into a multi-energy complementary convergence controller (1), the multi-energy complementary convergence controller (1) distributes direct current power to a digital relay protection cabinet (3) and an energy management matrix machine (4), the energy management matrix machine (4) receives and sends the predictive control information according to time sequence, transmits a control instruction to the digital relay protection cabinet (3), and starting a KM1 electromagnetic switch (5) and a KM2 electromagnetic switch (7) according to a predicted time sequence, charging and storing the DC1, DC2, DC3 and DCn storage battery pack (2) in a matrix manner, the direct current electric energy is tracked and output to a power supply conversion direct current bus (6) and a DC/AC converter (9), the data and the electric energy information of a direct current metering sensor (8) are received and sent, the DC/AC converter (9) and a power supply conversion transformer (10) are started, and 5kV/400Hz alternating electric energy is output; the sending of alternating electric energy is realized by transmitting electric energy data by an intelligent protection device (11), starting an intelligent vacuum circuit breaker GH1 assembly (13) and an M1 driving motor assembly (12) according to a time sequence to close a boosting transmission line, and sending 5kV alternating electric energy of new energy to a high-voltage transmission public end (14); based on 5kV alternating electric energy output by a power supply transformation transformer (10), a range of 100 square kilometers is transmitted for matched new energy, line loss is reduced, a transmission autotransformer (15) is adopted to increase the output voltage at a matched high-voltage transmission public end (14), and a high-voltage line lightning protection assembly (16) is arranged to prevent lightning from invading a power transmission system; the high-voltage transmission protection device (21) and the high-voltage end mutual inductor (20) receive and send electric energy operation data which comprise report voltage, current, temperature and insulation data information, start the intelligent vacuum circuit breaker GH2 assembly (18), the M2 driving motor assembly (17) and the high-voltage transmission iron tower mechanism (19), close the line of the high-voltage transmission iron tower, send out new energy electric energy to the high-voltage transmission protection device (21), and execute controllable transmission operation.
2. The method of claim 1, wherein the method comprises the following steps: in order to solve the problem that new energy does not depend on public power grid consumption, the technical scheme is suitable for intelligent micro-grid and source grid charge storage and consumption electric energy; the converter power distribution and residual electricity energy storage device consists of an M3 driving motor assembly (22), an intelligent vacuum circuit breaker GH3 assembly (23), a high-voltage converter transformer (24) and a low-voltage rectification controller (25); the high-voltage end transformer (20), the high-voltage power transmission protection device (21) and the low-voltage rectification controller (25) predict and transmit power data to the intelligent vacuum circuit breaker GH3 assembly (23) according to time sequence, the M3 is instructed to drive the motor assembly (22) to start a component for closing the intelligent vacuum circuit breaker GH3 assembly (23), and the high-voltage converter transformer (24) is executed to distribute power to the low-voltage rectification controller (25); the method comprises the steps that a high-voltage converter transformer (24) and a low-voltage rectification controller (25) output direct-current power to a positive-polarity direct-current bus 26, a negative-polarity direct-current bus 27 and a bipolar direct-current power public end 28, a flexible direct-current power distribution electric energy manager (29) distributes power to a load 1 adapter (30), a load 2 adapter (31) and a load n adapter (32), electric energy operation data are managed and transmitted, when the load power consumption is lower than a predicted value, a grid-connected control assembly (34) is instructed to connect a grid-connected power generation inverter (33) to a distributed public power grid end (35) for grid-connected power generation, and residual electricity in the grid-connected power generation process automatically charges and stores energy to an energy storage battery pack (36).
CN202210117021.6A 2022-02-07 2022-02-07 Method based on direct-current power supply and matched high-voltage transmission and flexible direct-current power distribution Pending CN114400707A (en)

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CN202210117021.6A CN114400707A (en) 2022-02-07 2022-02-07 Method based on direct-current power supply and matched high-voltage transmission and flexible direct-current power distribution

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CN202210117021.6A CN114400707A (en) 2022-02-07 2022-02-07 Method based on direct-current power supply and matched high-voltage transmission and flexible direct-current power distribution

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CN114400707A true CN114400707A (en) 2022-04-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117239711A (en) * 2023-11-13 2023-12-15 四川大学 Energy storage control method and device for improving power supply quality of well group of oil pumping unit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117239711A (en) * 2023-11-13 2023-12-15 四川大学 Energy storage control method and device for improving power supply quality of well group of oil pumping unit
CN117239711B (en) * 2023-11-13 2024-02-02 四川大学 Energy storage control method and device for improving power supply quality of well group of oil pumping unit

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