CN116054312A - Authority control method for grading safety of battery energy storage system - Google Patents
Authority control method for grading safety of battery energy storage system Download PDFInfo
- Publication number
- CN116054312A CN116054312A CN202211464283.6A CN202211464283A CN116054312A CN 116054312 A CN116054312 A CN 116054312A CN 202211464283 A CN202211464283 A CN 202211464283A CN 116054312 A CN116054312 A CN 116054312A
- Authority
- CN
- China
- Prior art keywords
- battery
- power
- level
- safety
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000001276 controlling effect Effects 0.000 claims abstract description 17
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 238000007599 discharging Methods 0.000 claims description 21
- 238000010248 power generation Methods 0.000 claims description 16
- 230000002265 prevention Effects 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 9
- 238000012937 correction Methods 0.000 claims description 9
- 230000004044 response Effects 0.000 claims description 8
- 230000007613 environmental effect Effects 0.000 claims description 6
- 238000003908 quality control method Methods 0.000 claims description 6
- 230000003993 interaction Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 230000000151 anti-reflux effect Effects 0.000 claims 2
- 238000012544 monitoring process Methods 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 abstract description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 8
- 229910001416 lithium ion Inorganic materials 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 238000012954 risk control Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
-
- 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
- H02J13/00001—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 characterised by the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
-
- 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
- H02J13/00002—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 characterised by monitoring
-
- 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
- H02J15/00—Systems for storing electric energy
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- 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
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
-
- 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
- H02J7/007—Regulation of charging or discharging current or voltage
-
- 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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
- H02J7/04—Regulation of charging current or voltage
Abstract
The invention provides a permission control method for classifying the safety of a battery energy storage system, which is characterized in that safety grades are divided into three grades, namely a first grade battery safety grade, a second grade protection safety grade and a third grade function grade, and three corresponding operation permissions are provided for the three safety grades, namely manufacturer supplier permission, professional technician permission and user permission; the manufacturer supplier authority is used for monitoring, regulating and controlling the multi-battery security level, the professional technician authority maintains the protection security level, and the user authority can set the function level; by opening different authorities for different groups, the risk of safe misoperation of an energy storage system caused by authority setting problems of non-manufacturers and non-technicians is effectively avoided, and the possibility of misoperation of different groups is removed from the mechanism.
Description
Technical Field
The invention relates to a control method of a system, in particular to a permission control method for classifying the safety of a battery energy storage system.
Background
The zero carbonization transformation of global energy greatly promotes the scale application acceleration of renewable energy. Because renewable energy sources generally have problems of volatility, intermittence and the like, energy storage technologies are required for balancing and absorbing. The lithium ion energy storage system has the advantages of flexibility, rapidness and long service life, and the installed capacity of the lithium ion energy storage system is fastest to increase in the novel energy storage field, so that the lithium ion energy storage system gradually becomes a key component of a modern low-inertia power system.
However, the lithium ion energy storage system has certain potential safety hazards due to the heating characteristic and the use of organic electrolyte. Particularly, under abusive conditions, the battery body is extremely susceptible to thermal runaway-induced fire and explosion accidents. In recent years, 32 fire explosion accidents of lithium ion energy storage power stations occur worldwide, the energy storage industry is knocked to be alerted, and the safety of lithium ion batteries is improved to a primary position. However, because the lithium ion battery has complex operating and using conditions, the safety accident causes are difficult to completely avoid, and the difficulty of extinguishing once the fire occurs is great. The currently feasible scheme is to use an Energy Management System (EMS) to monitor the safety state of the lithium battery in real time from the system angle, and once abuse occurs or early warning signals are timely found out and the reaction progress is cut off in early failure.
However, the lithium ion battery energy storage system is a complex system and has a unique hazard system, which brings great difficulty to the design and authority management of the energy storage control system, and particularly bears the authority of decision making and control tasks, and is particularly important to the risk control. Because the control system is mainly a software or cloud platform, when the energy storage and fire protection knowledge of software research and development personnel are insufficient, on one hand, the control system can be set according to the management authority of the traditional software, and only the limitation of information safety is considered, so that when the safety level definition of the authority of a specific user exceeds the knowledge of the user for safety protection, the fault can not be effectively controlled or misoperated in time, and further the fault is evolved into an accident; on the other hand, special visual display is not formed for technicians including firefighters, so that the technicians have doubts on the state of the power station system, and the rapid and orderly development of safety protection work is not facilitated.
It is therefore necessary to develop a security-graded rights control method for energy storage systems.
Disclosure of Invention
In order to solve the problem that non-professional personnel bring safe misoperation risks to an energy storage system due to authority problems in the prior art and improve the safety of the battery energy storage system, the invention provides an authority control method for grading the safety of the battery energy storage system, which comprises the following specific scheme:
a right control method for grading the safety of a battery energy storage system comprises the following steps:
s1, setting a security level: setting the security level as three levels, wherein the first level is the battery security level; the second level is a protection security level; the third level is a functional level;
s2, setting operation permission: setting corresponding operation authorities according to three levels of the security level, wherein the first operation authority level is the authority of a manufacturer supplier; the second operation authority level is the authority of the professional technician; the third operation authority level is user authority;
s3, judging whether the battery safety level is met, if yes, entering S4, and if not, entering a BMS battery management system;
s4, judging whether the protection security level is met after the battery security level is met, if so, entering S5, and if not, entering an EMS energy management system;
and S5, judging whether the function level is met after the protection security level is met, if so, judging that the energy storage participates in the work, and if not, entering an EMS energy management system.
Preferably, the parameters of the battery in S1 include battery SOC, battery temperature, and battery voltage.
Preferably, the manufacturer supplier authority is used for monitoring and regulating the safety level of the battery; professional technician rights are used to maintain the security level of protection; the user authority sets the function level.
Preferably, the BMS battery management system participates in management of the battery security level, and the manufacturer supplier simultaneously updates the bottom data of the BMS battery management systems through the EMS energy management system to complete the operation related to the battery security level, and the specific steps are as follows:
s1: constructing a control structure of a battery safety level in the BMS battery management system by a manufacturer supplier;
s2: the battery parameters are collected through the sensing subsystem, and parameter information is uploaded to the control subsystem through communication;
s3: the control subsystem judges the parameter information based on the control structure, if the acquired battery parameter range is out of a preset threshold range, the control subsystem outputs instructions including charging and discharging of the single battery SOC, regulation of the environmental temperature and regulation of the single battery voltage, and BMS sets the control execution subsystem based on the priority level, and the charging and discharging instructions of the single battery SOC are prioritized over the environmental temperature regulation instructions, which are prioritized over the voltage regulation instructions.
Preferably, the principle steps of control subsystem control in the battery safety level are as follows:
s1: setting upper and lower threshold values of the SOC of the single battery, an ambient temperature value range when the battery is charged and discharged, and voltage and other parameter ranges of the single battery;
s2: if the SOC of the single battery is judged to be in the normal charge quantity range, if the ambient temperature is out of the preset temperature value range, the control subsystem controls the heater or the air conditioner to finish temperature correction;
s3: if the SOC of the single battery is judged to be lower than the lowest charge quantity of the battery and the ambient temperature is within the threshold range of the charging ambient temperature, the control subsystem controls the converter to charge the single battery;
s4: judging that the SOC of the single battery is lower than the lowest charge amount of the battery, and if the ambient temperature is outside a preset temperature value range, controlling a heater or an air conditioner by a control subsystem to finish temperature correction, and controlling a subsystem converter to charge the single battery after the temperature correction is regulated to meet the condition of S2;
s5: and executing the charging instruction of S3, and stopping charging or discharging when the battery SOC corresponding to the voltage value is judged to be full, so as to prevent the overcharge or overdischarge of the battery.
Preferably, a professional technician regulates and controls the function of protecting the security level through a man-machine interaction interface, and the specific steps are as follows:
s1: constructing a safety control structure for preventing reverse flow of a power grid, preventing reverse flow of a battery and preventing overload of a transformer through an EMS energy management system;
s2: tracking work rates of the load and the photovoltaic inverter by adopting power tracking, feeding power parameters back to an EMS energy management system through communication, and making decisions and power response by the EMS energy management system based on a safety control structure;
s3: if the power distribution network feeds power to the power grid, taking measures for improving the battery charging power or reducing the battery discharging power according to the positive and negative of the photovoltaic power generation power minus the load power; if overload of the transformer occurs, starting energy storage compensation; if the photovoltaic power generation power is close to the load power or the photovoltaic power generation power fluctuation is large, the single battery SOC is set to charge or discharge only according to the set charge and discharge time period.
Preferably, the conditions for realizing the reverse flow prevention of the power grid, the reverse flow prevention of the battery and the overload prevention of the transformer in the safety structure are as follows:
when the photovoltaic power generation power is sufficient, the condition that the whole power distribution system does not generate power to the power grid is that the power grid is reverse flow prevention is that the battery charge power P Bat_in Not less than photovoltaic output power P pv Load power P load When the photovoltaic is not output to the power grid;
when the photovoltaic power generation power is insufficient, the condition of preventing the battery from flowing back when the whole power distribution system does not generate power to the power grid is that the battery discharging power P is met Bat_out Load power P is less than or equal to load Photovoltaic output power P pv When the power is not transmitted to the power grid, the battery does not output the power to the power grid;
when the photovoltaic system is not installed or is not connected with the EMS energy management system in communication, the condition that the energy storage system does not generate power to the power grid is that the battery discharge power P is met Bat_out Load power P is less than or equal to load The battery does not output to the power grid;
the overload prevention condition of the transformer is that the battery charge power P Bat_in Transformer protection upper limit P tf_limit Load power P load 。
Preferably, the EMS energy management system provides control authority and security control structure of a user side function level, and a user selects control of the function level according to actual requirements, which specifically includes the steps of:
s1: the EMS energy management system sets control scenes of demand control, time-sharing control, state check, electric energy quality control and auxiliary functions in a safety control structure suitable for a user side;
s2: the EMS energy management system judges based on the data and the control scene fed back by each acquisition unit in the process of providing a safety control structure conforming to the user function level;
s3: the EMS energy management system provides a human-computer interface for a user, the user inputs a control instruction and a query state of a scene on the human-computer interface, and simultaneously combines the human-computer interface and a battery control cabinet panel to select the input of the instruction;
s4: the EMS energy management system provides a safety control structure of a user function level, and after a user inputs an instruction through a human-computer interface or a panel of the battery control cabinet, a single battery cabinet in the EMS energy management system responds based on the safety control structure.
Preferably, the specific parameters that the EMS energy management system responds to by inputting instructions by the user are: the user inputs the demand value, the EMS energy management system provides a threshold range of the demand value based on the relation among the charge and discharge power, the load and the demand value, and the discharge power P of the battery is satisfied Bat_out ≥P load -P Is required to The method comprises the steps of carrying out a first treatment on the surface of the Charging power P of battery Bat_in ≤P PV -P load +P Is required to ；
When a user inputs a time-sharing control instruction, the discharging at the peak time and the charging at the low peak time are realized;
when a user inputs power quality control, controlling the active or reactive power of a micro-grid or a battery in a grid-connected state;
when the user setting allows receiving the auxiliary function instruction, the selection of the demand response, the virtual power plant, the planned charging or discharging is completed.
The beneficial effects are that:
(1) The invention provides a permission control method for classifying the safety of a battery energy storage system, which is characterized in that safety grades are divided into three grades, namely a first grade battery safety grade, a second grade protection safety grade and a third grade function grade, and three corresponding operation permissions are provided for the three safety grades, namely manufacturer supplier permission, professional technician permission and user permission; the manufacturer supplier authority is used for monitoring, regulating and controlling the multi-battery security level, the professional technician authority maintains the protection security level, and the user authority can set the function level; by opening different authorities for different groups, the risk of safe misoperation of an energy storage system caused by authority setting problems of non-manufacturers and non-technicians is effectively avoided, and the possibility of misoperation of different groups is removed from the mechanism.
(2) According to the authority control method for grading the safety of the battery energy storage system, a manufacturer supplier builds a control structure related to the safety level of the battery through a BMS battery management system, a professional technician builds a safety control structure related to the reverse flow of a power grid and overload of a transformer through an EMS energy management system, the EMS energy management system provides the control authority and the safety control structure of the function level of a user side, in the scene of the safety control structure of each grade, the tracking acquisition of information, the judgment of the information and the output control of instructions are completed based on the combination of software and hardware, and an operator has the capability of regulating and controlling the scene matched with the operation authority.
Drawings
FIG. 1 is a flow chart of an embodiment employing hierarchical control.
Fig. 2 is a diagram of a battery safety level versus safety control architecture for an energy storage system in an embodiment.
Fig. 3 is a control schematic diagram of a battery safety level in the embodiment.
Detailed Description
The present invention will be further described in detail with reference to the following examples and drawings for the purpose of enhancing the understanding of the present invention, which examples are provided for the purpose of illustrating the present invention only and are not to be construed as limiting the scope of the present invention.
Examples:
fig. 1 is a flow chart of a hierarchical control method for controlling the security of a battery energy storage system, specifically comprising the following steps:
s1, setting a security level: setting the security level as three levels, wherein the first level is the battery security level; the second level is a protection security level; the third level is a functional level, the necessary condition for realizing safety control of the protection safety level is that the battery safety level is in a safe state, the necessary condition for realizing safety control of the functional level is that the protection safety level is in a safe state, and the battery parameters in the battery safety level mainly comprise battery SOC, battery temperature and battery voltage;
s2, setting operation permission: setting corresponding operation authorities according to three levels of the security level, wherein the first operation authority level is the authority of a manufacturer supplier; the second operation authority level is the authority of the professional technician; the third operation authority level is user authority, manufacturer supplier authority is used for monitoring and regulating and controlling the battery safety level, professional technician authority is used for maintaining the protection safety level, and user authority is used for setting the function level;
s3, judging whether the battery safety level is met, if yes, entering S4, and if not, entering a BMS battery management system;
s4, judging whether the protection security level is met after the battery security level is met, if so, entering S5, and if not, entering an EMS energy management system;
and S5, judging whether the function level is met after the protection security level is met, if so, judging that the energy storage participates in the work, and if not, entering an EMS energy management system.
Wherein, BMS battery management system participates in the management of battery security level, and producer's supplier carries out the bottom data through EMS energy management system to a plurality of BMS battery management systems simultaneously and updates, accomplishes the operation that relates to battery security level, and specific steps are as follows:
s1: constructing a control structure of a battery safety level in a BMS battery management system by a manufacturer vendor, as shown in fig. 2;
s2: the battery parameters are collected through the sensing subsystem, and parameter information is uploaded to the control subsystem through communication;
s3: the control subsystem judges the parameter information based on the control structure, if the acquired battery parameter range is out of a preset threshold range, the control subsystem outputs instructions including charging and discharging of the single battery SOC, regulation of the environmental temperature and regulation of the single battery voltage, and BMS sets the control execution subsystem based on the priority level, and the charging and discharging instructions of the single battery SOC are prioritized over the environmental temperature regulation instructions, which are prioritized over the voltage regulation instructions.
Fig. 3 is a control schematic diagram of a battery safety level, and specifically includes the following steps:
s1: setting upper and lower threshold values of the SOC of the single battery, an ambient temperature value range when the battery is charged and discharged, and voltage and other parameter ranges of the single battery;
s2: if the SOC of the single battery is judged to be in the normal charge quantity range, if the ambient temperature is out of the preset temperature value range, the control subsystem controls the heater or the air conditioner to finish temperature correction;
s3: if the SOC of the single battery is judged to be lower than the lowest charge quantity of the battery and the ambient temperature is within the threshold range of the charging ambient temperature, the control subsystem controls the converter to charge the single battery;
s4: judging that the SOC of the single battery is lower than the lowest charge amount of the battery, and if the ambient temperature is outside a preset temperature value range, controlling a heater or an air conditioner by a control subsystem to finish temperature correction, and controlling a subsystem converter to charge the single battery after the temperature correction is regulated to meet the condition of S2;
s5: and executing the charging instruction of S3, and stopping charging or discharging when the battery SOC corresponding to the voltage value is judged to be full, so as to prevent the overcharge or overdischarge of the battery.
Professional technicians regulate and control the function of the protection security level through a man-machine interaction interface, and the specific steps are as follows:
s1: constructing a safety control structure for preventing reverse flow of a power grid, preventing reverse flow of a battery and preventing overload of a transformer through an EMS energy management system;
s2: tracking work rates of the load and the photovoltaic inverter by adopting power tracking, feeding power parameters back to an EMS energy management system through communication, and making decisions and power response by the EMS energy management system based on a safety control structure;
s3: if the power distribution network feeds power to the power grid, taking measures for improving the battery charging power or reducing the battery discharging power according to the positive and negative of the photovoltaic power generation power minus the load power; if overload of the transformer occurs, starting energy storage compensation; if the photovoltaic power generation power is close to the load power or the photovoltaic power generation power fluctuation is large, the single battery SOC is set to charge or discharge only according to the set charge and discharge time period.
The conditions for realizing the reverse flow prevention of the power grid, the reverse flow prevention of the battery and the overload prevention of the transformer in the safety structure are as follows:
when the photovoltaic power generation power is sufficient, the whole power distribution system does not supply electricityThe condition of the anti-backflow of the power grid for grid power generation is battery charging power P Bat_in Not less than photovoltaic output power P pv Load power P load When the photovoltaic is not output to the power grid;
when the photovoltaic power generation power is insufficient, the condition of preventing the battery from flowing back when the whole power distribution system does not generate power to the power grid is that the battery discharging power P is met Bat_out Load power P is less than or equal to load Photovoltaic output power P pv When the power is not transmitted to the power grid, the battery does not output the power to the power grid;
when the photovoltaic system is not installed or is not connected with the EMS energy management system in communication, the condition that the energy storage system does not generate power to the power grid is that the battery discharge power P is met Bat_out Load power P is less than or equal to load The battery does not output to the power grid;
the overload prevention condition of the transformer is that the battery charge power P Bat_in Transformer protection upper limit P tf_limit Load power P load 。
The EMS energy management system provides control authority and a safety control structure of a user side function level, and a user selects control of the function level according to actual requirements, and the method comprises the following specific steps:
s1: the EMS energy management system sets control scenes of demand control, time-sharing control, state check, electric energy quality control and auxiliary functions in a safety control structure suitable for a user side;
s2: the EMS energy management system judges based on the data and the control scene fed back by each acquisition unit in the process of providing a safety control structure conforming to the user function level;
s3: the EMS energy management system provides a human-computer interface for a user, the user inputs a control instruction and a query state of a scene on the human-computer interface, and simultaneously combines the human-computer interface and a battery control cabinet panel to select the input of the instruction;
s4: the EMS energy management system provides a safety control structure of a user function level, and after a user inputs an instruction through a human-computer interface or a panel of the battery control cabinet, a single battery cabinet in the EMS energy management system responds based on the safety control structure.
User input instruction, EMS energy management systemThe specific parameters for the response are: the user inputs the demand value, the EMS energy management system provides a threshold range of the demand value based on the relation among the charge and discharge power, the load and the demand value, and the discharge power P of the battery is satisfied Bat_out ≥P load -P Is required to The method comprises the steps of carrying out a first treatment on the surface of the Charging power P of battery Bat_in ≤P PV -P load +P Is required to ；
When a user inputs a time-sharing control instruction, the discharging at the peak time and the charging at the low peak time are realized;
when a user inputs power quality control, controlling the active or reactive power of a micro-grid or a battery in a grid-connected state;
when the user setting allows receiving the auxiliary function instruction, the selection of the demand response, the virtual power plant, the planned charging or discharging is completed.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The authority control method for grading the safety of the battery energy storage system is characterized by comprising the following steps of:
s1, setting a security level: setting the security level as three levels, wherein the first level is the battery security level; the second level is a protection security level; the third level is a functional level;
s2, setting operation permission: setting corresponding operation authorities according to three levels of the security level, wherein the first operation authority level is the authority of a manufacturer supplier; the second operation authority level is the authority of the professional technician; the third operation authority level is user authority;
s3, judging whether the battery safety level is met, if yes, entering S4, and if not, entering a BMS battery management system;
s4, judging whether the protection security level is met after the battery security level is met, if so, entering S5, and if not, entering an EMS energy management system;
and S5, judging whether the function level is met after the protection security level is met, if so, judging that the energy storage participates in the work, and if not, entering an EMS energy management system.
2. The method of claim 1, wherein the parameters of the battery in S1 include battery SOC, battery temperature, and battery voltage.
3. The method of claim 1, wherein the manufacturer's supplier rights are used to monitor and regulate the battery security level; professional technician rights are used to maintain the security level of protection; the user authority sets the function level.
4. The authority control method for grading the safety of a battery energy storage system according to claim 1, wherein the BMS battery management system participates in the management of the battery safety level, and a manufacturer supplier updates the bottom data of a plurality of BMS battery management systems through the EMS energy management system at the same time to complete the operation related to the battery safety level, and the specific steps are as follows:
s1: constructing a control structure of a battery safety level in the BMS battery management system by a manufacturer supplier;
s2: the battery parameters are collected through the sensing subsystem, and parameter information is uploaded to the control subsystem through communication;
s3: the control subsystem judges the parameter information based on the control structure, if the acquired battery parameter range is out of a preset threshold range, the control subsystem outputs instructions including charging and discharging of the single battery SOC, regulation of the environmental temperature and regulation of the single battery voltage, and BMS sets the control execution subsystem based on the priority level, and the charging and discharging instructions of the single battery SOC are prioritized over the environmental temperature regulation instructions, which are prioritized over the voltage regulation instructions.
5. The method for controlling the authority of the security classification of the battery energy storage system according to claim 4, wherein the principle steps of the control subsystem control in the battery security classification are as follows:
s1: setting upper and lower threshold values of the SOC of the single battery, an ambient temperature value range when the battery is charged and discharged, and voltage and other parameter ranges of the single battery;
s2: if the SOC of the single battery is judged to be in the normal charge quantity range, if the ambient temperature is out of the preset temperature value range, the control subsystem controls the heater or the air conditioner to finish temperature correction;
s3: if the SOC of the single battery is judged to be lower than the lowest charge quantity of the battery and the ambient temperature is within the threshold range of the charging ambient temperature, the control subsystem controls the converter to charge the single battery;
s4: judging that the SOC of the single battery is lower than the lowest charge amount of the battery, and if the ambient temperature is outside a preset temperature value range, controlling a heater or an air conditioner by a control subsystem to finish temperature correction, and controlling a subsystem converter to charge the single battery after the temperature correction is regulated to meet the condition of S2;
s5: and executing the charging instruction of S3, and stopping charging or discharging when the battery SOC corresponding to the voltage value is judged to be full, so as to prevent the overcharge or overdischarge of the battery.
6. The method for controlling the authority of the battery energy storage system safety grading according to claim 1, wherein the professional technician regulates the function of protecting the safety grade through the man-machine interaction interface, and the specific steps are as follows:
s1: constructing a safety control structure for preventing reverse flow of a power grid, preventing reverse flow of a battery and preventing overload of a transformer through an EMS energy management system;
s2: tracking work rates of the load and the photovoltaic inverter by adopting power tracking, feeding power parameters back to an EMS energy management system through communication, and making decisions and power response by the EMS energy management system based on a safety control structure;
s3: if the power distribution network feeds power to the power grid, taking measures for improving the battery charging power or reducing the battery discharging power according to the positive and negative of the photovoltaic power generation power minus the load power; if overload of the transformer occurs, starting energy storage compensation; if the photovoltaic power generation power is close to the load power or the photovoltaic power generation power fluctuation is large, the single battery SOC is set to charge or discharge only according to the set charge and discharge time period.
7. The method for controlling the authority of the battery energy storage system according to claim 1, wherein the conditions for realizing the anti-reflux of the power grid, the anti-reflux of the battery and the overload prevention of the transformer in the safety structure are as follows:
when the photovoltaic power generation power is sufficient, the condition that the whole power distribution system does not generate power to the power grid is that the power grid is reverse flow prevention is that the battery charge power P Bat_in Not less than photovoltaic output power P pv Load power P load When the photovoltaic is not output to the power grid;
when the photovoltaic power generation power is insufficient, the condition of preventing the battery from flowing back when the whole power distribution system does not generate power to the power grid is that the battery discharging power P is met Bat_out Load power P is less than or equal to load Photovoltaic output power P pv When the power is not transmitted to the power grid, the battery does not output the power to the power grid;
when the photovoltaic system is not installed or is not connected with the EMS energy management system in communication, the condition that the energy storage system does not generate power to the power grid is that the battery discharge power P is met Bat_out Load power P is less than or equal to load The battery does not output to the power grid;
the overload prevention condition of the transformer is that the battery charge power P Bat_in Transformer protection upper limit P tf_limit Load power P load 。
8. The authority control method for grading safety of battery energy storage system according to claim 1, wherein the EMS energy management system provides control authority and safety control structure of user side function level, and the user selects control of function level according to actual requirement, specifically comprising the steps of:
s1: the EMS energy management system sets control scenes of demand control, time-sharing control, state check, electric energy quality control and auxiliary functions in a safety control structure suitable for a user side;
s2: the EMS energy management system judges based on the data and the control scene fed back by each acquisition unit in the process of providing a safety control structure conforming to the user function level;
s3: the EMS energy management system provides a human-computer interface for a user, the user inputs a control instruction and a query state of a scene on the human-computer interface, and simultaneously combines the human-computer interface and a battery control cabinet panel to select the input of the instruction;
s4: the EMS energy management system provides a safety control structure of a user function level, and after a user inputs an instruction through a human-computer interface or a panel of the battery control cabinet, a single battery cabinet in the EMS energy management system responds based on the safety control structure.
9. The method of claim 8, wherein the specific parameters of the EMS energy management system response to the user input command are: the user inputs the demand value, the EMS energy management system provides a threshold range of the demand value based on the relation among the charge and discharge power, the load and the demand value, and the discharge power P of the battery is satisfied Bat_out ≥P load -P Is required to The method comprises the steps of carrying out a first treatment on the surface of the Charging power P of battery Bat_in ≤P PV -P load +P Is required to ；
When a user inputs a time-sharing control instruction, the discharging at the peak time and the charging at the low peak time are realized;
when a user inputs power quality control, controlling the active or reactive power of a micro-grid or a battery in a grid-connected state;
when the user setting allows receiving the auxiliary function instruction, the selection of the demand response, the virtual power plant, the planned charging or discharging is completed.
10. The authority control method for grading safety of a battery energy storage system according to claim 1, wherein the necessary condition for protecting the safety level to realize safety control is that the battery safety level is in a safe state, and the necessary condition for the functional level to realize safety control is that the functional level is in a safe state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211464283.6A CN116054312A (en) | 2022-11-22 | 2022-11-22 | Authority control method for grading safety of battery energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211464283.6A CN116054312A (en) | 2022-11-22 | 2022-11-22 | Authority control method for grading safety of battery energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116054312A true CN116054312A (en) | 2023-05-02 |
Family
ID=86118790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211464283.6A Pending CN116054312A (en) | 2022-11-22 | 2022-11-22 | Authority control method for grading safety of battery energy storage system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116054312A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102413106A (en) * | 2010-09-26 | 2012-04-11 | 百度在线网络技术（北京）有限公司 | Method for processing advertising agent data safely and system thereof |
| KR101468309B1 (en) * | 2013-06-03 | 2014-12-02 | 권동채 | The battery function testing system for the battery packs of mobile phones |
| CN107215228A (en) * | 2017-06-14 | 2017-09-29 | 上海蔚来汽车有限公司 | Power up optimization method and device, terminal, facility, equipment, storage medium |
| CN109501751A (en) * | 2017-11-06 | 2019-03-22 | 蔚来汽车有限公司 | On-vehicle battery method for safely carrying out and system and platform, controller and storage medium |
| CN109920197A (en) * | 2019-01-09 | 2019-06-21 | 中国电力科学研究院有限公司 | Fire-fighting prior-warning device and system for energy-accumulating power station |
| JP2020048203A (en) * | 2014-11-12 | 2020-03-26 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカＰａｎａｓｏｎｉｃ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｃｏｒｐｏｒａｔｉｏｎ ｏｆ Ａｍｅｒｉｃａ | Update management method, update management device, and control program |
| CN112527770A (en) * | 2020-12-12 | 2021-03-19 | 南京地铁建设有限责任公司 | Data management method and device for multi-authority escalator monitoring database |
-
2022
- 2022-11-22 CN CN202211464283.6A patent/CN116054312A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102413106A (en) * | 2010-09-26 | 2012-04-11 | 百度在线网络技术（北京）有限公司 | Method for processing advertising agent data safely and system thereof |
| KR101468309B1 (en) * | 2013-06-03 | 2014-12-02 | 권동채 | The battery function testing system for the battery packs of mobile phones |
| JP2020048203A (en) * | 2014-11-12 | 2020-03-26 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカＰａｎａｓｏｎｉｃ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｃｏｒｐｏｒａｔｉｏｎ ｏｆ Ａｍｅｒｉｃａ | Update management method, update management device, and control program |
| CN107215228A (en) * | 2017-06-14 | 2017-09-29 | 上海蔚来汽车有限公司 | Power up optimization method and device, terminal, facility, equipment, storage medium |
| CN109501751A (en) * | 2017-11-06 | 2019-03-22 | 蔚来汽车有限公司 | On-vehicle battery method for safely carrying out and system and platform, controller and storage medium |
| CN109920197A (en) * | 2019-01-09 | 2019-06-21 | 中国电力科学研究院有限公司 | Fire-fighting prior-warning device and system for energy-accumulating power station |
| CN112527770A (en) * | 2020-12-12 | 2021-03-19 | 南京地铁建设有限责任公司 | Data management method and device for multi-authority escalator monitoring database |
Non-Patent Citations (2)
| Title |
|---|
| 宋睿;公丕强;: "信息系统安全等级保护方案设计方法研究", 邮电设计技术, no. 04, 20 April 2015 (2015-04-20), pages 85 - 89 * |
| 张琳: "安阳地区智能变电站蓄电池组监护方案研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》, 15 August 2019 (2019-08-15), pages 042 - 769 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108556644B (en) | A kind of hybrid vehicle distance increasing unit power follow-up control method and system | |
| CN102214934B (en) | Smooth wind-optical generated output control method based on megawatt-grade battery energy-storage power station | |
| EP2605359B1 (en) | Battery system and its control method | |
| CN108879746B (en) | Centralized hybrid energy storage coordination control method based on multi-time scale demand response | |
| CN102208818B (en) | Wavelet-filtering-based output smoothing control method for megawatt wind/solar/battery power generation system | |
| EP2351189B1 (en) | Frequency responsive charge sustaining control of electricity storage systems for ancillary services on an electrical power grid | |
| CN102163849B (en) | Wind power output adaptive smoothing method based on energy storage battery charge state feedback | |
| CN109474030A (en) | Multidimensional region self-adapting intelligent charge control method | |
| CN115912447A (en) | Energy storage power station power distribution method and system | |
| CN114069676A (en) | Battery energy storage power station AGC control method based on SOC (System on chip) equipartition | |
| CN112910030A (en) | On-orbit autonomous management system and method of satellite energy system | |
| CN110867878A (en) | Control method for energy storage of flywheel energy storage hybrid lithium battery | |
| CN112865156B (en) | Energy storage system and power system | |
| CN116054312A (en) | Authority control method for grading safety of battery energy storage system | |
| CN109245313A (en) | A kind of ship energy management and monitoring system and method | |
| EP2330679B1 (en) | Method for controlling sodium-sulfur battery | |
| KR101474296B1 (en) | Energy storage system for power plant and the control method thereof | |
| CN110365005B (en) | Virtual controller for direct-current microgrid system | |
| CN117141233A (en) | Battery control system | |
| Wei et al. | Research on comprehensive evaluation of electric vehicle charging failures | |
| CN108631366A (en) | A kind of micro-capacitance sensor off-network control method for coordinating of high robust | |
| CN112366724B (en) | Reactive compensation method and system based on storage battery | |
| CN112952904A (en) | Control method and device based on storage and charging integrated power system | |
| CN114530884A (en) | Light storage integrated micro-grid system with island capability | |
| CN109936145A (en) | Charging station load adjustment method suitable for garden distribution |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |