CN113437789B - Energy storage system with reconfigurable topology, mobile energy storage shelter and multi-element application method thereof - Google Patents

Energy storage system with reconfigurable topology, mobile energy storage shelter and multi-element application method thereof Download PDF

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Publication number
CN113437789B
CN113437789B CN202110991883.7A CN202110991883A CN113437789B CN 113437789 B CN113437789 B CN 113437789B CN 202110991883 A CN202110991883 A CN 202110991883A CN 113437789 B CN113437789 B CN 113437789B
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energy storage
mode
shelter
power
direct current
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CN113437789A (en
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范震
张广智
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Nanjing Lijun Power Technology Research Institute Co ltd
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Nanjing Lijun New Energy Storage Research Institute Co ltd
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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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • 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
    • H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
    • H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
    • 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
    • H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
    • 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
    • H02J9/061—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 for DC powered loads
    • 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
    • H02J9/062—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 for AC powered loads
    • 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
    • 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
    • H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/40—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries adapted for charging from various sources, e.g. AC, DC or multivoltage
    • 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
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • 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
    • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02B90/20—Smart grids as enabling technology in buildings sector
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/12—Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems
    • Y04S20/248—UPS systems or standby or emergency generators

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

Abstract

The invention provides a topology reconfigurable energy storage system, a mobile energy storage shelter and a multi-element application method thereof, wherein the topology reconfigurable energy storage system comprises energy storage shelter core equipment, and the energy storage shelter core equipment comprises: a battery system; the two ends of the energy storage converter system are respectively connected with the battery system and the alternating current load; the direct current conversion system is arranged between the national standard direct current input end and the national standard direct current output end; the SCR static switch system is connected with the alternating current load, the energy storage and conversion system, the commercial power and the diesel engine, is used for quickly carrying out fault isolation when the commercial power is abnormal, and is in an off-grid operation mode; the power distribution system comprises a plurality of direct current power distribution switches and a plurality of alternating current power distribution switches and is used for carrying out topology recombination between the energy storage shelter core equipment and the mains supply, the diesel engine and the load in combination with the SCR static switch system. The method and the device can be suitable for switching different application scenes through topology reconstruction, reduce the waste of energy storage resources and improve the practicability and the utilization rate.

Description

Energy storage system with reconfigurable topology, mobile energy storage shelter and multi-element application method thereof
Technical Field
The invention belongs to the technical field of mobile energy storage, and particularly relates to an energy storage system with a reconfigurable topology, a mobile energy storage shelter and a multi-element application method thereof.
Background
The dependence of modern society to the electric power energy strengthens day by day, individualized demands such as important load power conservation, the interim increase-volume of distribution transformer, emergency power supply, road rescue are increasing day by day, if open curtain formula, the ceremony formula of making a memorial ceremony, release meeting etc. important activity power conservation demand, the district increase-volume demand of period nature, seasonal heavy overload, emergency power supply demand such as outdoor construction, electric power rush-repair, electric automobile road rescue demand, urgent need for a clean, nimble, reliable, possess the emergent power supply equipment that protects of many unit application modes.
In the prior art, the emergency power supply mainly generates electricity by diesel oil, has heavy pollution, low efficiency and poor electric energy quality, and does not accord with the trend of social development. The mobile energy storage is taken as the main strength of the power grid emergency power supply equipment and is completely exposed, the mobile energy storage shelter which is small in size, flexible to move and free of waste gas and noise pollution is accepted by more and more people, but in the aspect of application scenes, the mobile energy storage shelter is still singly stopped in a temporary power supply stage, the mobile and flexible characteristics of the mobile energy storage are not fully considered in the prior art, and the mobile energy storage resources are more idle and waste is serious. For example, patent publication No. CN112821480A discloses an electricity protection system based on parallel connection of multiple mobile energy storage power sources and a parallel connection capacity increasing method, where the electricity protection system includes a grid-connected switch unit, a mobile energy storage power source unit and a control unit, and the mobile energy storage power source unit has a parallel connection cascade stage auxiliary interface; the parallel switch unit consists of a fast switch or a static switch, a switch branch voltage and current detection unit and branch protection; the mobile energy storage power supplies are composed of an energy storage battery management system, an energy storage converter and a switch, each mobile energy storage power supply is provided with two parallel cascade stage auxiliary interfaces, and the circuit power of the cascade stage interfaces is the power supply rated capacity of a single mobile energy storage unit in parallel; the control unit is used for monitoring, controlling and protecting the power protection system based on the parallel connection of the multiple mobile energy storage power supplies, and the requirements of temporary capacity increase and the like are met. However, the method is limited to temporary capacity increase, the range of the use scene is small, and various requirements of users cannot be met.
Disclosure of Invention
The invention aims to provide an energy storage system with reconfigurable topology, a mobile energy storage shelter and a multi-application method thereof.
The invention provides the following technical scheme:
the application provides a reconfigurable energy storage system of topology, including energy storage shelter core equipment, energy storage shelter core equipment includes:
the battery system is used for managing and controlling the battery;
the two ends of the energy storage converter system are respectively connected with the battery system and the alternating current load and are used for realizing bidirectional transmission of alternating current electric energy and direct current electric energy;
the direct current conversion system is arranged between a national standard direct current input end and a national standard direct current output end and is used for performing bidirectional connection between the battery system and the electric automobile, constructing a charging system and implementing charging or rescue service for the electric automobile;
the SCR static switch system is connected with the alternating current load, the energy storage and conversion system, the commercial power and the diesel engine, is used for quickly carrying out fault isolation when the commercial power is abnormal, and is in an off-grid operation mode;
the power distribution system comprises a plurality of direct current power distribution switches and a plurality of alternating current power distribution switches and is used for carrying out topology recombination between the core equipment of the energy storage shelter and the mains supply, the diesel engine and the load in combination with the SCR static switch system, wherein the direct current power distribution switches are connected with the battery system, the energy storage converter system, the national standard direct current input end and the direct current conversion system, and the alternating current power distribution switches are connected with the SCR static switch system, the mains supply, the diesel engine, the energy storage converter system and the alternating current load.
Preferably, the battery system comprises a BMU battery management unit, a BCMU battery pack control unit and a BMS energy storage system management unit, and the battery system adopts a lithium iron phosphate battery system.
Preferably, the energy storage shelter core device is connected with an EMS management system, and is used for acquiring data of the battery system, the energy storage converter system, the direct current conversion system, the SCR static switch system and the power distribution system through remote regulation, remote control and remote measurement remote signaling technologies, and implementing energy management of various application strategies to realize reliable operation in various operation modes.
Preferentially, the EMS management system is also connected with a data processing system, the data processing system is connected with a cloud platform and a Lora transceiving system, and the data processing system is used for performing data interaction with the EMS management system through data acquired by the Lora transceiving system, collecting and processing data under the EMS management system, and uploading the data to the cloud platform for data analysis and display; the cloud platform is used for displaying the operation data of the mobile energy storage shelter in real time and carrying out online monitoring and data analysis.
Preferentially, the Lora transceiver system includes electrically connected Lora receiving terminal and Lora transmission terminal for convey the data transmission who gathers to EMS management system, Lora transmission terminal is connected with information acquisition system, is used for data acquisition, and conveys the data of gathering to EMS management system through Lora transceiver system.
Preferentially, the information acquisition system is connected with a power distribution area, the information acquisition system and the Lora transmitting terminal are integrated in the power distribution area, and the information acquisition system is used for acquiring distribution and transformation capacity and three-phase current external power distribution data in the power distribution area and transmitting the data to the EMS management system.
Preferably, the energy storage system is provided with an external interface group, and the external interface group comprises a city electrical interface, a diesel engine interface, a national standard direct current input interface, a load interface and a national standard direct current output interface.
Based on the energy storage system with reconfigurable topology, the application also provides a mobile energy storage shelter, which comprises the energy storage system with reconfigurable topology.
Based on the mobile energy storage shelter, the application also provides a multivariate application method of the mobile energy storage shelter, which comprises the following steps:
s1, collecting user requirements and an operation mode required by a mobile energy storage shelter, and determining the operation state of the current mobile energy storage shelter;
s2, calling an idle mobile energy storage shelter according to the charge state of the mobile energy storage shelter, sending the mobile energy storage shelter to a demand place, and accessing according to user demands and an access scheme;
s3, issuing a determined operation mode instruction to the accessed mobile energy storage shelter, wherein the operation mode comprises a capacity expansion mode, an electricity protection mode, a capacity expansion and electricity protection mode, a power supply mode, a charging mode and a bypass maintenance mode;
s4, after the mobile energy storage shelter receives an operation mode instruction, detecting a current operation mode, a topological state, an operation state and input and output data, reconstructing a topological structure of the mobile energy storage shelter to a corresponding operation mode through various combinations of a power distribution system and an SCR static switch system according to the operation mode, and executing an operation strategy of the operation mode;
and S5, after the task is finished, issuing a stop instruction and exiting, modifying the running state into an idle state, if the task is not finished, judging the current running mode of the mobile energy storage shelter, and repeatedly executing the step S4 until the task is finished.
Preferentially, in the step S4, in the capacity increase mode, the mobile energy storage shelter interface is accessed to a standby switch or an alternating current bus of the distribution substation, a required treatment target is calculated according to the acquired substation data, the output power is adjusted in real time, and the temporary capacity increase of the substation is realized by discharging at a load peak section and charging at a load valley section;
under the power conservation mode, the mobile energy storage shelter interface is connected with a mains supply, a diesel engine and a load, when the power supply fails, the power distribution system and the SCR static switch system are adjusted to carry out off-grid or bypass to ensure the power supply of the system, and the power supply is switched to a grid-connected state after being recovered and is consistent with the mains supply or the diesel engine;
under the capacity increasing and power maintaining mode, the mobile energy storage shelter interface is connected to a distribution transformer of the transformer area and a load to be subjected to power maintaining, and the capacity increasing state and the power maintaining state are switched;
in the power supply mode, a charging gun of the movable energy storage shelter is connected into the electric automobile, and direct current power supply or alternating current power supply is carried out according to the connection state, wherein the power supply mode comprises a direct current power supply mode and an alternating current power supply mode;
under a charging mode, a charging port of the mobile energy storage shelter is connected into a charging gun to perform direct current charging or alternating current charging at constant power, and the charging mode comprises a direct current charging mode and an alternating current charging mode;
under the bypass maintenance mode, when the system is in fault, a signal is sent to the SCR static switch system through the energy storage converter system to realize bypass, or the switch of the power distribution system is manually adjusted to carry out electrified fault maintenance, and the bypass maintenance mode comprises an automatic bypass mode and a manual bypass mode.
The invention has the beneficial effects that: through the topological reorganization between SCR static switch system and distribution system and commercial power, diesel engine and load, can make the removal energy storage shelter provide the power protection service at major activity, access platform district provides interim increase-volume service when adopting seasonal overload such as tea industry, aquaculture, tourism industry, provide emergent power supply in the open air, the road rescue service, also design the friendship in the aspect of charging, the multiple charging methods of direct current, satisfy the charging in different places, deposit the requirement, improve the utilization ratio of removal energy storage shelter, solve the power consumption demand that electric wire netting or user are different fast, and overcome the idle wasting of resources that leads to of removal energy storage shelter.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of the operational steps of the present invention;
FIG. 2 is a schematic diagram of the system configuration of the mobile energy storage shelter of the present invention;
FIG. 3 is a schematic representation of the mode of operation of the present invention;
FIG. 4 is a topological block diagram of the mobile energy storage shelter of the present invention;
fig. 5 is a schematic view of the capacity-increasing mode access of the present invention;
FIG. 6 is a schematic diagram of a power conservation mode access connection of the present invention;
FIG. 7 is a schematic diagram of a capacity-increasing + power-conserving mode access connection of the present invention;
FIG. 8 is a schematic diagram of a power mode access connection of the present invention;
fig. 9 is a schematic diagram of the charging mode access connection of the present invention.
Detailed Description
The application provides a reconfigurable energy storage system of topology, including energy storage shelter core equipment, energy storage shelter core equipment includes:
as shown in fig. 2, a battery system for battery management and control. The battery system comprises a BMU battery management unit, a BCMU battery pack control unit and a BMS energy storage system management unit, and adopts a lithium iron phosphate battery system.
As shown in fig. 2, two ends of the energy storage converter system are respectively connected to the battery system and the ac load for realizing bidirectional transmission of ac and dc electric energy;
as shown in fig. 2, the dc conversion system is disposed between the national standard dc input terminal and the national standard dc output terminal, and is configured to perform bidirectional connection between the battery system and the electric vehicle, construct a charging system, and perform charging or rescue service for the electric vehicle;
as shown in fig. 2, the SCR static switch system is connected to the ac load, the energy storage converter system, the utility power, and the diesel engine, and is configured to quickly perform fault isolation when the utility power is abnormal, and to reconfigure the system to an off-grid operation mode;
as shown in fig. 2, the power distribution system includes a plurality of dc power distribution switches and a plurality of ac power distribution switches, and is configured to perform topology reconfiguration between the core devices of the energy storage shelter and the commercial power, the diesel engine, and the load in combination with the SCR static switch system, where the dc power distribution switches are connected to the battery system, the energy storage converter system, the national standard dc input terminal, and the dc converter system, and the ac power distribution switches are connected to the SCR static switch system, the commercial power, the diesel engine, the energy storage converter system, and the ac load.
As shown in fig. 2, the energy storage shelter core device is connected to an EMS management system, and is used for acquiring data of the battery system, the energy storage converter system, the dc converter system, the SCR static switch system, and the power distribution system by remote control, remote measurement, and remote signaling technologies, and implementing energy management of various application strategies to implement reliable operation in various operation modes.
As shown in fig. 2, the EMS management system is further connected to a data processing system, and the data processing system is connected to a cloud platform and a Lora transceiver system, and the data processing system is configured to perform data interaction with the EMS management system through data acquired by the Lora transceiver system, collect and process data under the EMS management system, and upload the data to the cloud platform for data analysis and display; the cloud platform is used for displaying the operation data of the mobile energy storage shelter in real time and carrying out online monitoring and data analysis.
As shown in fig. 2, the Lora transceiver system includes electrically connected Lora receiving terminal and Lora transmitting terminal for transmitting the acquired data to the EMS management system, and the Lora transmitting terminal is connected with the information acquisition system for data acquisition and transmitting the acquired data to the EMS management system through the Lora transceiver system.
As shown in fig. 2, the information acquisition system is connected to a power distribution area, the information acquisition system and the Lora transmission terminal are integrated in the power distribution area, and the information acquisition system is used for acquiring distribution transformation capacity and three-phase current external power distribution data in the power distribution area and transmitting the data to the EMS management system.
As shown in fig. 5-9, the energy storage system is provided with an external interface set, and the external interface set comprises a city electrical interface (i), a diesel engine interface (ii), a national standard direct current input interface (iii), a load interface (iv) and a national standard direct current output interface (v).
Based on the energy storage system with reconfigurable topology, the application also provides a mobile energy storage shelter, which comprises the energy storage system with reconfigurable topology.
As shown in fig. 1, based on the mobile energy storage shelter, the present application also provides a multivariate application method of the mobile energy storage shelter, which includes the following steps:
s1, collecting user requirements and operation modes required by the mobile energy storage square cabin, and determining the operation state of the current mobile energy storage square cabin.
And S2, calling the idle mobile energy storage square cabin by combining the charge state of the mobile energy storage square cabin, sending the idle mobile energy storage square cabin to a demand place, and accessing according to the user demand and an access scheme. The method specifically comprises the following steps:
1) and according to the charge state of the idle mobile energy storage shelter, if the charge quantity is more than 80%, the calling condition is met, and the calling condition is sent to a demand place according to the demand of a user.
2) And according to the user requirements in the step S1, the mobile energy storage shelter is connected with a power supply and a load according to different operation modes.
As shown in fig. 3, s3, issuing a determined operation mode instruction to the accessed mobile energy storage shelter, where the operation mode includes a capacity expansion mode, an electricity protection mode, a capacity expansion + electricity protection mode, a power supply mode, a charging mode, and a bypass maintenance mode.
And S4, after the mobile energy storage shelter receives an operation mode instruction, detecting a current operation mode, a topological state, an operation state and input and output data, reconstructing a topological structure of the mobile energy storage shelter to a corresponding operation mode through various combinations of a power distribution system and an SCR static switch system according to the operation mode, and executing an operation strategy of the operation mode.
In step S4, as shown in fig. 4, QS1 to QS4 are dc power distribution switches, QS5 to QS8 are ac power distribution switches, and the SCR static switch system includes two ac static switches, which are SCR1 and SCR2, and are formed by connecting two thyristors in parallel in the opposite direction.
In the compatibilization mode, the method specifically comprises the following steps:
A) as shown in fig. 5, the load interface of the mobile energy storage shelter is connected to the distribution station area and can be connected to the standby switch or the alternating current bus;
B) the method comprises the steps that a direct current distribution switch QS3-QS4, an alternating current distribution switch QS6-QS8, a static switch SCR1-SCR2 are disconnected, and a direct current distribution switch QS1-QS2 and an alternating current distribution switch QS5 are closed;
C) the mobile energy storage shelter is automatically paired with the information acquisition system through near field communication of a Lora receiving and transmitting system;
D) the information acquisition system uploads power distribution capacity and three-phase current data of a power distribution station area;
E) the mobile energy storage shelter calculates a required treatment target according to the acquired data of the power distribution area, adjusts output power in real time, discharges at a load peak section and charges at a load valley section, and achieves the purpose of temporary capacity increase of the power distribution area.
Under the power-saving mode, the method specifically comprises the following steps:
A) as shown in fig. 6, the commercial power interface, the diesel engine interface and the load interface of the mobile energy storage shelter are respectively connected to the commercial power, the diesel engine and the load, wherein the mobile energy storage shelter can be disconnected if no diesel engine is available;
B) opening QS3-QS4, QS6, QS8 and SCR2, and closing QS1, QS2, QS5, QS7 and SCR 1;
C) the mains supply and QS7 and QS8 of the diesel engine are electrically interlocked double-power-supply switches, the mains supply is powered down and then automatically closes QS8 and disconnects QS7, and the mains supply is restored and then closes QS7 and disconnects QS 8;
D) the mobile energy storage shelter collects commercial power or diesel engine data in real time, when the voltage amplitude or frequency is abnormal, the SCR1 is cut off within 10ms of the energy storage converter system, and the mobile energy storage shelter is converted to a network to supply power to a load;
E) after power supply is recovered, the energy storage and current transformation system collects information such as voltage amplitude, frequency and phase of the commercial power or the diesel engine, adjusts the output of the energy storage and current transformation system to start the same period, follows the commercial power or the diesel engine after the output of the energy storage and current transformation system is consistent with the commercial power or the diesel engine, sends an instruction to the SCR1 to switch on, and switches to a grid-connected state after switching on;
F) if a system fault occurs, a signal is sent to the SCR2 through the energy storage and current transformation system to rapidly switch on the switch for bypassing in 10ms, so that the power supply of the system is not affected.
Under the capacity increasing and electricity protecting mode, the method specifically comprises the following steps:
A) as shown in fig. 7, the commercial power interface and the load interface of the energy storage shelter are respectively connected to the 0.4kV side of the distribution transformer of the distribution station area and the load side to be protected, and only important loads are protected due to limited power;
B) opening QS3-QS4, QS6, QS8 and SCR2, and closing QS1, QS2, QS5, QS7 and SCR 1;
C) the mobile energy storage shelter is automatically paired with the information acquisition system through Lora near field communication;
D) the mobile energy storage shelter collects distribution transformer voltage data of a distribution station area in real time, when the voltage amplitude or the frequency is abnormal, the energy storage current transformation system quickly cuts off the SCR1, the mobile energy storage shelter is switched off a network to supply power to an accessed load, and meanwhile, the capacity increasing function is quitted; if the voltage amplitude or the frequency is normal, turning to the step E; if the system is in fault, a signal is sent to the SCR2 through the energy storage converter system to carry out rapid switching-on for bypassing, so that the system power supply is not influenced;
E) after the power supply is recovered, the energy storage and current transformation system collects the voltage amplitude, frequency, phase and other information of the commercial power or the diesel engine, adjusts the output of the energy storage and current transformation system, follows the commercial power or the diesel engine after the voltage amplitude, frequency, phase and other information are consistent with those of the commercial power or the diesel engine, sends an instruction to switch on the SCR1, and starts the capacity increasing function;
F) the information acquisition system uploads power distribution capacity and three-phase current data of a power distribution station area;
G) the mobile energy storage shelter calculates a required treatment target according to the acquired data of the power distribution transformer area, and adjusts output power in real time to increase capacity;
H) and D-G is repeatedly executed.
In the power supply mode, the method specifically comprises the following steps:
A) as shown in fig. 8, detecting whether a national standard charging gun is inserted into the electric vehicle, if not, turning to step E;
B) opening QS 2-QS 3, QS 5-QS 8 and SCR1-SCR2, and closing QS1 and QS 4;
C) converting a direct current power supply mode, and performing direct current charging by the direct current conversion system according to the voltage and current requested by the electric automobile, wherein the voltage output range is 200 VDC and 750 VDC;
D) after the battery of the electric automobile is fully charged, the direct current conversion system is stopped;
E) in the alternating current supply mode, QS3-QS4, QS6-QS8 and SCR1-SCR2 are switched off, and QS1, QS2 and QS5 are switched on;
F) the energy storage converter system works in an off-grid V/F mode to provide a reliable power supply for a load;
G) and stopping the power supply after the power supply is finished.
In the charging mode, the method specifically comprises the following steps:
A) as shown in fig. 9, detecting whether a charging gun enters the national standard charging port, if not, turning to step E;
B) opening QS2, QS4, S5-QS 8 and SCR1-SCR2, and closing QS1 and QS 3;
C) sending a signal to a charging pile to request voltage and current for charging;
D) after the movable energy storage shelter is fully charged, a stop signal is sent to an external charging gun and charging is stopped;
E) detecting whether the voltage of the commercial power is present or not, switching the voltage into an alternating current charging mode, disconnecting QS3, QS4, QS5, QS6, QS8, SCR1-SCR2, and closing QS1, QS2 and QS 7;
F) starting an energy storage and current transformation system and charging in a constant power mode;
G) and after the charging is finished, the energy storage and current transformation system stops outputting, and the system is stopped.
Under the bypass overhaul mode, the bypass overhaul mode comprises an automatic bypass mode and a manual bypass mode, and the method specifically comprises the following steps:
A) when the system runs, if the system fails, a signal is sent to the SCR2 through the energy storage converter system to carry out rapid switching-on for bypassing, so that the AC power supply of the system is not influenced;
B) when the system is stopped for maintenance, the system can be charged for fault maintenance by manually closing QS6 and QS7 and disconnecting all other switches.
And S5, after the task is finished, issuing a stop instruction and exiting, modifying the running state into an idle state, if the task is not finished, judging the current running mode of the mobile energy storage shelter, and repeatedly executing the step S4 until the task is finished.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (2)

1. A multi-element application method of a mobile energy storage shelter is characterized by comprising the following steps: the mobile energy storage shelter comprises an energy storage system with reconfigurable topology, the energy storage system with reconfigurable topology comprises energy storage shelter core equipment, and the energy storage shelter core equipment comprises:
the battery system is used for managing and controlling the battery;
the two ends of the energy storage converter system are respectively connected with the battery system and the alternating current load and are used for realizing bidirectional transmission of alternating current electric energy and direct current electric energy;
the direct current conversion system is arranged between a national standard direct current input end and a national standard direct current output end and is used for performing bidirectional connection between the battery system and the electric automobile, constructing a charging system and implementing charging or rescue service for the electric automobile;
the SCR static switch system is connected with the alternating current load, the energy storage and conversion system, the commercial power and the diesel engine, is used for quickly carrying out fault isolation when the commercial power is abnormal, and is in an off-grid operation mode;
the distribution system comprises a plurality of direct current distribution switches and a plurality of alternating current distribution switches, and is used for carrying out topology recombination between the core equipment of the energy storage shelter and the commercial power, the diesel engine and the load in combination with the SCR static switch system;
the battery system comprises a BMU battery management unit, a BCMU battery pack control unit and a BMS energy storage system management unit, and adopts a lithium iron phosphate battery system;
the energy storage shelter core equipment is connected with an EMS management system and is used for acquiring data of a battery system, an energy storage converter system, a direct current conversion system, an SCR static switch system and a power distribution system through remote regulation, remote control and remote measurement remote signaling technologies, and implementing energy management of various application strategies to realize reliable operation in various operation modes;
the EMS management system is also connected with a data processing system, the data processing system is connected with a cloud platform and a Lora receiving and transmitting system, and the data processing system is used for performing data interaction with the EMS management system through data acquired by the Lora receiving and transmitting system, collecting and processing data under the EMS management system, and uploading the data to the cloud platform for data analysis and display; the cloud platform is used for displaying the operating data of the energy storage system in real time and carrying out online monitoring and data analysis;
the system comprises an information acquisition system, an EMS management system, a Lora receiving and transmitting system and an EMS management system, wherein the Lora receiving and transmitting system comprises a Lora receiving terminal and a Lora transmitting terminal which are electrically connected and used for transmitting acquired data to the EMS management system;
the information acquisition system is connected with a power distribution area, the information acquisition system and the Lora transmitting terminal are integrated in the power distribution area, and the information acquisition system is used for acquiring distribution transformer capacity and three-phase current external power distribution data in the power distribution area and transmitting the data to the EMS management system;
the energy storage system is provided with an external interface group, and the external interface group comprises a city electric interface, a diesel engine interface, a national standard direct current input interface, a load interface and a national standard direct current output interface;
the multi-application method of the mobile energy storage shelter comprises the following steps:
s1, collecting user requirements and an operation mode required by a mobile energy storage shelter, and determining the operation state of the current mobile energy storage shelter;
s2, calling an idle mobile energy storage shelter according to the charge state of the mobile energy storage shelter, sending the mobile energy storage shelter to a demand place, and accessing according to user demands and an access scheme;
s3, issuing a determined operation mode instruction to the accessed mobile energy storage shelter, wherein the operation mode comprises a capacity expansion mode, an electricity protection mode, a capacity expansion and electricity protection mode, a power supply mode, a charging mode and a bypass maintenance mode;
s4, after the mobile energy storage shelter receives an operation mode instruction, detecting a current operation mode, a topological state, an operation state and input and output data, reconstructing a topological structure of the mobile energy storage shelter to a corresponding operation mode through various combinations of a power distribution system and an SCR static switch system according to the operation mode, and executing an operation strategy of the operation mode;
and S5, after the task is finished, issuing a stop instruction and exiting, modifying the running state into an idle state, if the task is not finished, judging the current running mode of the mobile energy storage shelter, and repeatedly executing the step S4 until the task is finished.
2. The multi-application method of the mobile energy storage shelter of claim 1, wherein: in the step S4, in the capacity increasing mode, the mobile energy storage shelter interface is connected to a standby switch or an alternating current bus of the power distribution area, a required treatment target is calculated according to the acquired area data, the output power is adjusted in real time, the power is discharged in a load peak section and charged in a load valley section, and the temporary capacity increasing of the power distribution area is realized;
under the power conservation mode, the mobile energy storage shelter interface is connected with a mains supply, a diesel engine and a load, when the power supply fails, the power distribution system and the SCR static switch system are adjusted to carry out off-grid or bypass to ensure the power supply of the system, and the power supply is switched to a grid-connected state after being recovered and is consistent with the mains supply or the diesel engine;
under the capacity increasing and power maintaining mode, the mobile energy storage shelter interface is connected to a distribution transformer of the transformer area and a load to be subjected to power maintaining, and the capacity increasing state and the power maintaining state are switched;
in the power supply mode, a charging gun of the movable energy storage shelter is connected into the electric automobile, and direct current power supply or alternating current power supply is carried out according to the connection state, wherein the power supply mode comprises a direct current power supply mode and an alternating current power supply mode;
under a charging mode, a charging port of the mobile energy storage shelter is connected into a charging gun to perform direct current charging or alternating current charging at constant power, and the charging mode comprises a direct current charging mode and an alternating current charging mode;
under the bypass maintenance mode, when the system is in fault, a signal is sent to the SCR static switch system through the energy storage converter system to realize bypass, or the switch of the power distribution system is manually adjusted to carry out electrified fault maintenance, and the bypass maintenance mode comprises an automatic bypass mode and a manual bypass mode.
CN202110991883.7A 2021-08-27 2021-08-27 Energy storage system with reconfigurable topology, mobile energy storage shelter and multi-element application method thereof Active CN113437789B (en)

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