CN114123420A - Self-charging control system and method based on micro-grid - Google Patents

Self-charging control system and method based on micro-grid Download PDF

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Publication number
CN114123420A
CN114123420A CN202111452844.6A CN202111452844A CN114123420A CN 114123420 A CN114123420 A CN 114123420A CN 202111452844 A CN202111452844 A CN 202111452844A CN 114123420 A CN114123420 A CN 114123420A
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CN
China
Prior art keywords
microgrid
ems
switch
bms
control system
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Pending
Application number
CN202111452844.6A
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Chinese (zh)
Inventor
许卫国
李虎
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Jiangsu Fenghai New Energy Seawater Desalination Co ltd
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Jiangsu Fenghai New Energy Seawater Desalination Co ltd
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Application filed by Jiangsu Fenghai New Energy Seawater Desalination Co ltd filed Critical Jiangsu Fenghai New Energy Seawater Desalination Co ltd
Priority to CN202111452844.6A priority Critical patent/CN114123420A/en
Publication of CN114123420A publication Critical patent/CN114123420A/en
Pending legal-status Critical Current

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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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/08—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems requiring starting of a prime-mover
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • 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

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a self-charging control system based on a microgrid, which comprises an EMS microgrid battery pack, an EMS microgrid alternating current switch, an EMS microgrid control system, a diesel generator switch, an AC/DC module, a microgrid self-charging system, a DC/DC module, a BMS emergency starting switch, a PCS energy storage converter, a PCS control system, a BMS direct current switch, a BMS battery cluster, a BMS control system, a DCDC converter, a DCDC control system and a photovoltaic module. Compared with the prior art, the invention has the advantages that: according to the invention, the electric energy of the energy storage battery cluster or the diesel generator inside the microgrid is used for automatically and continuously charging the power supply of the microgrid control system when the power supply is stopped, so that the microgrid system cannot be started after the system is stopped for a long time, and the stability and the use efficiency of the system are improved.

Description

Self-charging control system and method based on micro-grid
Technical Field
The invention relates to the technical field of new energy microgrid control systems, in particular to a microgrid-based self-charging control system and method.
Background
At present, in a new energy microgrid system, an EMS microgrid control system, a PCS energy storage converter, a DCDC converter, a BMS battery management system, a BMS battery cluster, a fan inverter, a fan controller and the like are all key devices of the new energy microgrid system, the start and the operation of the devices all need to provide a control power supply for the microgrid system, so that the action of a battery pack of the microgrid control system is very critical, if field devices are stopped for a long time, the power supply of the microgrid battery pack is exhausted, and therefore the self-charging device and the method of the microgrid control system can become one of key technologies for solving the current problems.
Disclosure of Invention
The invention aims to overcome the technical defects and provides a self-charging control system and method based on a microgrid.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a self-charging control system based on a micro-grid comprises an EMS micro-grid battery pack, an EMS micro-grid alternating current switch, an EMS micro-grid control system, a diesel generator switch, an AC/DC module, a micro-grid self-charging system, a DC/DC module, a BMS emergency starting switch, a PCS energy storage converter, a PCS control system, a BMS direct current switch, a BMS battery cluster, a BMS control system, a DCDC converter, a DCDC control system and a photovoltaic module, wherein the EMS micro-grid battery pack, the EMS micro-grid control system and the BMS control system are connected through an alternating current bus 1, the EMS micro-grid battery pack, the micro-grid EMS alternating current switch, the diesel generator switch and the PCS energy storage converter are connected through an alternating current bus 2, and the EMS micro-grid control system, the PCS energy storage converter, the DCDC control system and the BMS micro-grid energy storage converter are connected through an alternating current bus 2, The system comprises a BMS control system, a BMS battery cluster, a micro-grid self-charging system, a BMS emergency starting switch, a diesel generator control system, a diesel generator switch and a diesel generator which are connected through a communication bus, the diesel generator switch connects the diesel generator control system and the diesel generator through an alternating current bus 3, the diesel generator is connected with an AC/DC module through an alternating current bus 4, a photovoltaic module is connected with a DCDC converter through a direct current bus 1, the DCDC converter connects the BMS emergency starting switch, the BMS direct current switch, the DCDC control system and a PCS energy storage converter through a direct current bus 2, the BMS direct current switch is connected with the BMS battery cluster through a direct current bus 3, the BMS emergency starting switch connects the BMS battery cluster with the DC/DC module through the direct current bus 4, and the DC/DC module is connected with the micro-grid self-charging system through a direct current bus 6, the micro-grid self-charging system is connected with the AC/DC module through the direct current bus 5.
As an improvement, a load bus is connected to the EMS microgrid AC switch.
As an improvement, the EMS emergency starting switch and the diesel generator switch are normally-open switches, and the EMS emergency starting switch and the diesel generator switch are interlocked with the BMS direct-current switch.
A self-charging control method based on a microgrid specifically comprises the following steps:
s1, connect direct current bus 4 through BMS battery cluster and supply power for DC/DC module, direct current bus 6 sends DC/DC module power to the microgrid from charging system, control the emergent starting switch of BMS through the communication bus microgrid, the emergent starting switch of BMS sends the power of BMS battery cluster to PCS energy storage converter through direct current bus 2, PCS energy storage converter sends the power to EMS microgrid group battery through alternating current bus 2, microgrid self-charging system and PCS system, EMS microgrid control system exchanges data through the communication bus, the charging of automatic control EMS microgrid group battery.
S2, the diesel generator power supply is sent to a diesel generator switch and a diesel generator control system through an alternating current bus 3, the diesel generator power supply is sent to an AC/DC module through an alternating current bus 4, electricity of the AC/DC module is sent to a microgrid self-charging system through a direct current bus 5, the diesel generator switch is controlled through a communication bus and the microgrid self-charging system, the diesel generator power supply is sent to an EMS microgrid battery pack through an alternating current bus 2, the microgrid self-charging system exchanges data with the EMS microgrid control system and the diesel generator control system, and the EMS microgrid battery pack is automatically controlled to be charged.
As an improvement, when the EMS micro-grid battery pack is charged, the DCDC converter does not work and only participates in the work when the micro-grid normally works, and finally the load bus is supplied with power and the BMS battery cluster is charged.
As the improvement, when EMS microgrid battery pack charges, emergent starting switch of EMS and diesel generator switch interlock and emergent starting switch of EMS and diesel generator switch do not work simultaneously.
As an improvement, when the EMS microgrid battery pack is charged, the microgrid alternating-current switch keeps a disconnected state and the electric energy loss of the self-charging microgrid system is saved.
As an improvement, a control strategy is arranged in the EMS micro-grid control system and is comprehensively responsible for management and scheduling of each system.
Compared with the prior art, the invention has the advantages that: according to the self-charging control system and method based on the microgrid, the electric energy of the energy storage battery cluster or the diesel generator inside the microgrid is used for automatically and continuously charging when the power supply of the microgrid control system is shut down, the microgrid system cannot be started after the system is shut down for a long time, and therefore the stability and the use efficiency of the system are improved.
Drawings
Fig. 1 is a schematic block diagram of a microgrid-based self-charging control system of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The following further describes embodiments of the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals.
It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
In order to make the content of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
With the attached drawings, the self-charging control system based on the microgrid comprises an EMS microgrid battery pack, an EMS microgrid alternating current switch, an EMS microgrid control system, a diesel generator switch, an AC/DC module, a microgrid self-charging system, a DC/DC module, a BMS emergency starting switch, a PCS energy storage converter, a PCS control system, a BMS direct current switch, a BMS battery cluster, a BMS control system, a DCDC converter, a DCDC control system and a photovoltaic module, wherein the microgrid battery pack, the EMS microgrid alternating current switch, the diesel generator switch and the PCS energy storage converter are connected through an alternating current bus 1, the EMS microgrid switch, the EMS microgrid control system, the PCS energy storage converter, the DCDC converter, the PCS energy storage converter and the BMS control system are connected through an alternating current bus 2, and the EMS microgrid alternating current switch, the EMS microgrid control system, the PCS energy storage converter, the DCDC converter and the BMS energy storage converter are connected through an alternating current bus 2, The system comprises a DCDC control system, a BMS direct-current switch, a BMS battery cluster, a microgrid self-charging system, a BMS emergency starting switch, a diesel generator control system, a diesel generator switch and a diesel generator which are connected through a communication bus, wherein the diesel generator switch connects the diesel generator control system and the diesel generator through an alternating current bus 3, the diesel generator is connected with an AC/DC module through an alternating current bus 4, a photovoltaic component is connected with a DCDC converter through a direct current bus 1, the DCDC converter connects the BMS emergency starting switch, the BMS direct-current switch, the DCDC control system and a PCS energy storage converter through a direct current bus 2, the BMS direct current switch is connected with the BMS battery cluster through the direct current bus 3, the BMS emergency starting switch connects the BMS battery cluster and the BMS direct current/DC module through the direct current bus 4, and the DC/DC module is connected with the microgrid self-charging system through a direct current bus 6, the micro-grid self-charging system is connected with the AC/DC module through the direct current bus 5.
And the EMS micro-grid alternating current switch is connected with a load bus.
The emergency starting switch of the EMS and the diesel generator switch are normally-open switches, and the emergency starting switch of the EMS and the diesel generator switch are interlocked with the BMS direct-current switch.
A self-charging control method based on a microgrid specifically comprises the following steps:
s1, connect direct current bus 4 through BMS battery cluster and supply power for DC/DC module, direct current bus 6 sends DC/DC module power to the microgrid from charging system, control the emergent starting switch of BMS through the communication bus microgrid, the emergent starting switch of BMS sends the power of BMS battery cluster to PCS energy storage converter through direct current bus 2, PCS energy storage converter sends the power to EMS microgrid group battery through alternating current bus 2, microgrid self-charging system and PCS system, EMS microgrid control system exchanges data through the communication bus, the charging of automatic control EMS microgrid group battery.
S2, the diesel generator power supply is sent to a diesel generator switch and a diesel generator control system through an alternating current bus 3, the diesel generator power supply is sent to an AC/DC module through an alternating current bus 4, electricity of the AC/DC module is sent to a microgrid self-charging system through a direct current bus 5, the diesel generator switch is controlled through a communication bus and the microgrid self-charging system, the diesel generator power supply is sent to an EMS microgrid battery pack through an alternating current bus 2, the microgrid self-charging system exchanges data with the EMS microgrid control system and the diesel generator control system, and the EMS microgrid battery pack is automatically controlled to be charged.
When the EMS microgrid battery pack is charged, the DCDC converter does not work and only participates in work when the microgrid normally works, and finally supplies power to the load bus and charges the BMS battery cluster.
When the EMS micro-grid battery pack is charged, the EMS emergency starting switch and the diesel generator switch are interlocked, and the EMS emergency starting switch and the diesel generator switch do not work simultaneously.
When the EMS micro-grid battery pack is charged, the micro-grid alternating-current switch keeps a disconnected state and saves the electric energy loss of the self-charging micro-grid system.
And a control strategy is arranged in the EMS micro-grid control system and is comprehensively responsible for the management and scheduling of each system.
The present invention and its embodiments have been described above, and the description is not intended to be limiting, and the drawings are only one embodiment of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. The self-charging control system based on the microgrid is characterized by comprising an EMS microgrid battery pack, an EMS microgrid alternating current switch, an EMS microgrid control system, a diesel generator switch, an AC/DC module, a microgrid self-charging system, a DC/DC module, a BMS emergency starting switch, a PCS energy storage converter, a PCS control system, a BMS direct current switch, a BMS battery cluster, a BMS control system, a DCDC converter, a DCDC control system and a photovoltaic module, wherein the microgrid battery pack, the EMS microgrid control system and the BMS control system are connected through an alternating current bus 1, the microgrid battery pack, the EMS microgrid alternating current switch, the diesel generator switch and the PCS energy storage converter are connected through an alternating current bus 2, and the EMS microgrid alternating current switch, the EMS microgrid control system, the PCS energy storage converter, the DC/DC converter and the BMS energy storage converter are connected through an alternating current bus 2, The system comprises a DCDC converter, a DCDC control system, a BMS direct current switch, a BMS battery cluster, a microgrid self-charging system, a BMS emergency starting switch, a diesel generator control system, a diesel generator switch and a diesel generator which are connected through a communication bus, wherein the diesel generator switch connects the diesel generator control system and the diesel generator through an alternating current bus 3, the diesel generator is connected with an AC/DC module through an alternating current bus 4, the photovoltaic module is connected with the DCDC converter through a direct current bus 1, the DCDC converter connects the BMS emergency starting switch, the BMS direct current switch, the DCDC control system and a PCS energy storage converter through a direct current bus 2, the BMS direct current switch is connected with the BMS battery cluster through the direct current bus 3, the BMS emergency starting switch connects the battery cluster and the DC/DC module through the direct current bus 4, the DC/DC module is connected with the microgrid self-charging system through a direct current bus 6, the micro-grid self-charging system is connected with the AC/DC module through the direct current bus 5.
2. The self-charging control system based on the microgrid of claim 1, characterized in that a load bus is connected to the EMS microgrid ac switch.
3. The microgrid-based self-charging control system of claim 1, wherein the EMS emergency start switch and the diesel generator switch are normally open switches, and the EMS emergency start switch and the diesel generator switch are interlocked with a BMS dc switch.
4. A self-charging control method based on a microgrid is characterized by specifically comprising the following steps:
s1, connect direct current bus 4 through BMS battery cluster and supply power for DC/DC module, direct current bus 6 sends DC/DC module power to the microgrid from charging system, control the emergent starting switch of BMS through the communication bus microgrid, the emergent starting switch of BMS sends the power of BMS battery cluster to PCS energy storage converter through direct current bus 2, PCS energy storage converter sends the power to EMS microgrid group battery through alternating current bus 2, microgrid self-charging system and PCS system, EMS microgrid control system exchanges data through the communication bus, the charging of automatic control EMS microgrid group battery.
S2, the diesel generator power supply is sent to a diesel generator switch and a diesel generator control system through an alternating current bus 3, the diesel generator power supply is sent to an AC/DC module through an alternating current bus 4, electricity of the AC/DC module is sent to a microgrid self-charging system through a direct current bus 5, the diesel generator switch is controlled through a communication bus and the microgrid self-charging system, the diesel generator power supply is sent to an EMS microgrid battery pack through an alternating current bus 2, the microgrid self-charging system exchanges data with the EMS microgrid control system and the diesel generator control system, and the EMS microgrid battery pack is automatically controlled to be charged.
5. The microgrid-based self-charging control method of claim 4, wherein when the EMS microgrid battery pack is charged, the DCDC converter does not work and only participates in work when the microgrid is in normal operation, and finally power is supplied to a load bus while the BMS battery cluster is charged.
6. The self-charging control method based on the micro-grid according to claim 5, wherein when the EMS micro-grid battery pack is charged, the EMS emergency starting switch and the diesel generator switch are interlocked, and the EMS emergency starting switch and the diesel generator switch do not work simultaneously.
7. The microgrid-based self-charging control method of claim 6, wherein when the EMS microgrid battery pack is charged, a microgrid alternating-current switch is kept in an off state and power loss of a self-charging microgrid system is saved.
8. The microgrid-based self-charging control method of claim 4, characterized in that a control strategy is arranged in the EMS microgrid control system and is fully responsible for management and scheduling of each system.
CN202111452844.6A 2021-12-01 2021-12-01 Self-charging control system and method based on micro-grid Pending CN114123420A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111452844.6A CN114123420A (en) 2021-12-01 2021-12-01 Self-charging control system and method based on micro-grid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111452844.6A CN114123420A (en) 2021-12-01 2021-12-01 Self-charging control system and method based on micro-grid

Publications (1)

Publication Number Publication Date
CN114123420A true CN114123420A (en) 2022-03-01

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CN202111452844.6A Pending CN114123420A (en) 2021-12-01 2021-12-01 Self-charging control system and method based on micro-grid

Country Status (1)

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