CN115622239A - Energy storage system local controller with control logic function - Google Patents
Energy storage system local controller with control logic function Download PDFInfo
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- CN115622239A CN115622239A CN202211230641.7A CN202211230641A CN115622239A CN 115622239 A CN115622239 A CN 115622239A CN 202211230641 A CN202211230641 A CN 202211230641A CN 115622239 A CN115622239 A CN 115622239A
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- 238000007405 data analysis Methods 0.000 claims abstract description 19
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- 238000007599 discharging Methods 0.000 claims abstract description 16
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- 238000009413 insulation Methods 0.000 claims description 12
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- 238000007726 management method Methods 0.000 description 6
- 230000003449 preventive effect Effects 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
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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
- 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
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- 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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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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
- 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
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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
- 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
- H02J13/00006—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 information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for AC mains or AC distribution networks
- H02J3/28—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
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an energy storage system local controller with a control logic function, which is used for each energy storage subsystem in an energy storage power station, integrates a data acquisition unit, a data analysis processing unit and a data transmission unit, realizes the functions of data acquisition, network monitoring and network data analysis, the data acquisition unit is connected with a protection measurement and control device in a BMS, a PCS and an alternating current power distribution cabinet, the acquired information comprises the temperature, the charging state, the discharging state, the charging latch, the discharging latch, the SOC, the current and the voltage on the alternating current/direct current side, the data analysis processing unit analyzes and processes the acquired data, judges the states of the battery and the PCS, the data transmission unit is connected with an EMS, uploads the data analysis and processing results, and when the battery or the PCS is abnormal, an abnormal signal is sent to the BMS or the PCS system, so that the energy storage subsystem is tripped and stopped. The invention can independently complete the local centralized judgment and control of the energy storage subsystem, reduce the daily operation workload of the EMS and has flexible operation.
Description
Technical Field
The invention belongs to the field of energy storage station on-site monitoring, and particularly relates to an energy storage system local controller with a control logic function.
Background
The existing energy storage control technology strategy adopts an Energy Management System (EMS) centralized control mode, an energy storage converter and a battery management system are connected into the EMS system through an Ethernet, information of an energy storage battery and a PCS is uploaded, the EMS analyzes and processes energy data, and the operating conditions of equipment and the management condition of the system are known according to an analysis result. Meanwhile, after the EMS receives the scheduling instruction, the EMS responds according to the state of the energy storage system and the self-operation strategy to complete the functions of peak regulation, frequency modulation, reactive power compensation, black start and the like.
The prior art has the following defects:
1) The data acquisition, analysis, operation and storage of the energy storage power station are all realized in an Energy Management System (EMS), and the daily operation workload of the EMS is large.
2) The EMS system has a relatively single structure, and when EMS equipment fails, the energy storage power station can be stopped, and the information of the energy storage power station cannot be received and analyzed.
3) The existing EMS system realizes alarm and trip after detecting a certain fault event, cannot realize preventive alarm and trip on control logic, reduces the cycle life of a battery, and can cause combustion and explosion of a battery container in serious cases.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention provides a method which can independently complete the local centralized judgment and control of an energy storage subsystem and effectively reduce the daily operation workload of an EMS; the EMS and the local controller realize double-layer control by two monitoring systems, and realize layered zoning and local control modes, so that the operation mode is more flexible; when the EMS fails, the local controller can still monitor the operation of the energy storage subsystem and analyze and process the data of the energy storage power station; when comprehensive abnormity occurs in the battery container, the local controller realizes preventive alarm and tripping on the battery container, effectively interrupts the condition that equipment abnormity is converted into accidents, and reduces the probability of accidents such as fire, explosion and the like.
The technical scheme of the invention is as follows: a local controller of an energy storage system with a control logic function is applied to each energy storage subsystem in an energy storage power station, integrates a data acquisition unit, a data analysis processing unit and a data transmission unit to realize the functions of data acquisition, network monitoring, network data analysis and data uploading,
the data acquisition unit is respectively connected with the BMS system, the PCS system and the protection measurement and control device in the alternating current power distribution cabinet, and the information acquired by the data acquisition unit comprises battery temperature, charging state, discharging state, charging lockout, discharging lockout, battery charge state, alternating current/direct current side current and voltage;
the data analysis processing unit analyzes and processes the acquired data and judges the states of the battery and the PCS;
the data transmission unit is connected with the EMS system, uploads a data analysis and processing result, and sends an abnormal signal to the BMS system or the PCS system when the battery or the PCS system is abnormal so as to trip and stop the energy storage subsystem; the EMS system monitors the energy storage subsystem according to the real-time data provided by the local controller, and when the local controller has a fault, the EMS system takes over the analysis and processing function.
Preferably, the local controller is installed in the converter container PCS device cabinet, and configures a network switch for interconnecting with the PCS system and the BMS system.
Preferably, the network communication connection between the local controller and the EMS system is as follows: and the local controller leads two paths of optical cables to be connected to an EMS system in an EMS system control cabinet in the master control container.
Preferably, the local controller is connected to the PCS in a network communication manner: the PCS adopts two paths of Ethernet lines to be connected to a network switch and then is connected to a local controller through the two paths of Ethernet lines by the network switch, if the local controller controls n PCS units together, the PCS units are connected with the PCS units independently, and the PCS units are not interconnected.
Preferably, the network communication connection between the local controller and the BMS system is as follows: the battery container battery cluster is internally connected in series by adopting Ethernet lines, two paths of Ethernet lines are led to a network switch by taking the battery cluster as a unit, the network switch is connected to a local controller by adopting two paths of Ethernet lines, if the local controller is connected with n battery containers in total, the local controller is independently connected with each battery container, and the containers are not interconnected.
Preferably, the local controller and the protection measurement and control device are connected in a manner that: the protection measurement and control device is connected to a network switch by adopting two Ethernet lines and then connected to a local controller by the network switch through the two Ethernet lines, and the local controller collects the bus voltage and the outgoing line current of the low-voltage alternating-current side through a control cable; if the local controller is connected with n protection measurement and control devices, the local controller is independently connected with each protection measurement and control device, and the devices are not interconnected.
Preferably, the local controller hardware configuration comprises: the CPU card is arranged in the shell and integrates a data analysis processing unit;
the power supply plug-in is used for configuring a power supply of the device and sending out an alarm signal when the device fails;
three telemetering measurement plug-ins are used for collecting the current and voltage analog value of the alternating current side;
the four remote signaling quantity plug-ins are used for collecting the switch quantity value of the position of the circuit breaker on the alternating current side;
the network port connecting plug-in is configured with not less than 3 Ethernet ports, is used for connecting with a switch and receiving collected data from a PCS and BMS system;
the optical interface connecting plug-in is configured with at least 4 optical fiber interfaces and is used for connecting with an EMS system and transmitting and processing data;
the group of storage devices are used for storing the acquired data and the analysis processing result;
one group of indicator lamps comprise a device operation indicator lamp, a device fault indicator lamp, a device alarm indicator lamp and a device resetting indicator lamp, and the other group of indicator lamps are all cabin operation indicator lamps;
a set of buttons;
a display;
a housing for mounting the components.
Preferably, the local controller collects data of the temperature of the single battery, the voltage of the battery, the insulation resistance, the charging state, the discharging state, the charging lockout, the discharging lockout, the chargeable amount, the dischargeable amount, the chargeable power, the dischargeable power and the current of the series loop, which are collected by the BMS system, analyzes and summarizes the data and then uploads the data to the EMS system;
the local controller collects the operation state, fault state, direct-current side current, voltage, active power, reactive power and battery state of charge (SOC) data of the PCS device, which are collected by the PCS system, analyzes and summarizes the data and then uploads the data to the EMS system;
the local controller collects current, voltage and power factor data of an alternating current side, calculates active power and reactive power in the device, and uploads the active power and the reactive power to an EMS system;
the local controller collects internal environment data of the battery container and the variable flow container, such as temperature and humidity, smoke sensation, entrance guard state and air conditioner running state, sets limit values about the temperature and humidity data, and sends abnormal states to the EMS system.
Preferably, the collected battery temperature data are uploaded to two single batteries with higher temperature in each battery cluster during daily operation, a battery temperature limit value is set, and when the temperature exceeds the limit value, the battery temperature data are preferably uploaded to an EMS system;
uploading the highest voltage and the lowest voltage of the single batteries in each battery cluster during daily operation, setting a battery voltage limit value, and preferentially uploading the voltage to an EMS system when the voltage exceeds an upper limit value or a lower limit value;
setting an insulation resistance limit value for the collected insulation resistance data, and uploading only insulation resistance abnormal data to an EMS system;
uploading only the collected various battery state quantities to the EMS system in relation to the collected charging state, discharging state, charging lockout and discharging lockout data;
uploading the lowest value of the data to an EMS system during daily operation according to the collected chargeable amount, dischargeable amount, chargeable power and dischargeable power data;
setting a current limit value for the collected series loop current data, and uploading only current abnormal data to an EMS system;
the collected operation state and fault state of the PCS device are all uploaded to the EMS system;
setting current and voltage limit values for collected current and voltage data of the direct current side of the PCS unit, and uploading abnormal data to an EMS system when the current and voltage limit values are higher or lower than the limit values;
uploading 'sum' data to an EMS system about the collected active power and reactive power of the direct current side of the PCS unit;
uploading the lowest residual capacity level of the single batteries in each battery cluster and the charge state of the whole battery cluster during daily operation according to the collected SOC data;
the data about the smoke sensor and the entrance guard state data are uploaded to an EMS system only when the smoke sensor is started and opened;
as for the air conditioner operation state data, the data is uploaded to the EMS system only when the air conditioner is stopped.
Preferably, the local controller adopts a scoring early warning tripping method, scores the collected data according to a specified scoring system and grades, generates a total score in the local controller every 5 seconds, and realizes the control of the local controller on the energy storage subsystem according to a specified grading control method for the total score; when one local controller simultaneously controls a plurality of energy storage battery cabins, each energy storage battery cabin is respectively subjected to scoring and total-scoring hierarchical control, and only abnormal energy storage battery cabins act when alarming and tripping.
The beneficial effects of the invention are as follows:
1) The local controller provided by the invention can independently complete local centralized judgment and control of the energy storage subsystem, and effectively reduce the daily operation workload of the EMS;
2) The EMS and the local controller two sets of monitoring systems realize double-layer control, realize layered zoning and a local control mode, and are more flexible in operation mode;
3) When the EMS has a fault, the local controller can still monitor the operation of the energy storage subsystem and analyze and process the data of the energy storage power station;
4) By using the scoring early warning tripping method and the total-scoring level tripping method, when comprehensive abnormality occurs in the battery container, the local controller realizes preventive warning and tripping on the battery container, effectively interrupts the condition that equipment abnormality is converted into an accident, and reduces the probability of accidents such as fire, explosion and the like.
Drawings
FIG. 1 is a diagram showing the configuration of each unit of the local controller according to the present invention;
FIG. 2 is a network structure diagram of a monitoring system of an energy storage power station;
FIG. 3 is a diagram of a local controller hardware configuration according to the present invention;
FIG. 4 is a flow chart of a total class tripping method;
FIG. 5 is a schematic diagram of the energy storage subsystem wiring;
FIG. 6 is a diagram of the hardware configuration of the present invention;
FIG. 7 is a schematic diagram of the hardware connection of the present invention;
in the figure, 1, a power supply plug-in unit, 2, a remote measuring plug-in unit, 3, a remote signalling plug-in unit, 4, a network port connecting plug-in unit, 5, an optical port connecting plug-in unit, 6, a device operation indicating lamp, 7, a device fault indicating lamp, 8, a device alarm indicating lamp, 9, a device resetting indicating lamp, 10, each cabin operation indicating lamps, 11, buttons, 12, a display, 13, a shell and 14, a CPU plug-in unit are arranged.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, but the scope of the present invention is not limited thereto.
Example 1
As shown in fig. 1 to 5, the present invention provides an energy storage system local controller with control logic function, which is applied to each energy storage subsystem in an energy storage power station. The local controller integrates a data acquisition unit, a data analysis processing unit and a data transmission unit, and realizes the functions of data acquisition, network monitoring, network data analysis, data uploading and the like. The data acquisition unit is connected with a Battery Management System (BMS) and an energy storage converter (PCS) and a protection measurement and control device in the alternating current power distribution cabinet, and the acquired information comprises battery temperature, a charging state, a discharging state, charging lockout, discharging lockout, a battery state of charge (SOC), alternating current/direct current side current, voltage and the like. The data analysis processing unit analyzes and processes the acquired data and judges the states of the battery and the PCS. The data transmission unit is connected with an Energy Management System (EMS), uploads data analysis and processing results, and sends an abnormal signal to the BMS or PCS system when the battery or PCS is abnormal so as to trip and stop the energy storage subsystem. The EMS monitors the energy storage subsystem according to the real-time data provided by the local controller, and when the local controller fails, the EMS takes over the analysis and processing function.
The installation position and connection of the invention are as follows:
the local controller is arranged in the converter container PCS device cabinet, and is configured with a network switch for interconnecting with systems such as PCS and BMS.
The network communication connection mode of the local controller and the EMS adopts: and the local controller leads two paths of optical cables to be connected to an EMS system in an EMS control cabinet in the master control container.
The network communication connection mode of the local controller and the PCS is as follows: the PCS is connected to a network switch by adopting two Ethernet lines, and then is connected to a local controller by the network switch through the two Ethernet lines. If the local controller controls n PCS units in common, the PCS units are connected with the local controller independently, and the PCS units are not connected with each other.
Network communication connection mode of local controller and BMS: the battery container battery cluster is internally connected with an Ethernet line in series, the battery cluster is taken as a unit to lead two paths of Ethernet lines to be connected to a network switch, and the network switch is connected to a local controller by two paths of Ethernet lines. If the local controller is connected with n battery containers, the local controller is connected with each battery container independently, and the containers are not interconnected.
The connection mode of the local controller and the protection measurement and control device is as follows: the protection measurement and control device is connected to the network switch by adopting two Ethernet lines and then connected to the local controller through the network switch by the two Ethernet lines. The local controller collects the voltage of a bus at the low-voltage alternating-current side and the current of an outlet wire through a control cable. If the local controller is connected with n protection measurement and control devices, the local controller is independently connected with each protection measurement and control device, and the devices are not interconnected.
The hardware configuration of the present invention is as follows (as shown in fig. 6 and 7):
the hardware configuration of the local controller comprises a CPU plug-in 14 and an integrated data analysis processing unit; a power plug-in 1, which configures the power supply of the device and sends out an alarm signal when the device fails; three telemetering measurement plug-ins 2 for collecting analog values such as alternating current side current and voltage; the four remote signalling quantity plug-ins 3 are used for collecting the switching quantity values such as the positions of the circuit breakers on the alternating current side; a network port connecting plug-in 4, which is configured with not less than 3 Ethernet ports and is used for connecting with a switch and receiving the collected data from PCS and BMS; an optical interface connecting plug-in 5, which is configured with at least 4 optical fiber interfaces and is used for connecting with an EMS system and transmitting and processing data; the group of storage devices are used for storing the acquired data and the analysis processing result; one group of indicator lamps comprises a device operation indicator lamp 6, a device fault indicator lamp 7, a device alarm indicator lamp 8 and a device resetting indicator lamp 9, and the other group of indicator lamps is a cabin operation indicator lamp 10; a set of buttons 11; a display 12; and a housing 13 for mounting the respective components.
The data acquisition and screening of the invention are as follows:
the local controller collects data such as single battery temperature, battery voltage, insulation resistance, charging state, discharging state, charging lockout, discharging lockout, chargeable amount, dischargeable amount, chargeable power, dischargeable power, series loop current and the like collected by the BMS system, analyzes and summarizes the data, and uploads the data to the EMS system.
And uploading the temperatures of the two single batteries with higher temperatures in each battery cluster during daily operation, setting a battery temperature limit value, and preferentially uploading the temperature data to the EMS system when the temperature exceeds the limit value.
And uploading the maximum voltage and the minimum voltage of the single batteries in each battery cluster during daily operation, setting a battery voltage limit value, and preferably uploading the voltage to an EMS system when the voltage exceeds an upper limit value or a lower limit value.
With respect to the collected insulation resistance data, an insulation resistance limit value is set, and only insulation resistance abnormality data is uploaded to the EMS system.
With respect to the collected state of charge, state of discharge, charge dwell, and discharge dwell data, only the aggregated various battery state quantities are uploaded to the EMS system.
And uploading the lowest value of the data to the EMS system in daily operation according to the collected chargeable amount, dischargeable amount, chargeable power and dischargeable power data.
With respect to the collected series loop current data, a current limit is set, and only current anomaly data is uploaded to the EMS system.
The local controller collects data such as the running state and the fault state of the PCS device, the direct current side current, the voltage, the active power, the reactive power, the battery state of charge (SOC) and the like collected by the PCS system, analyzes and summarizes the data, and uploads the data to the EMS system.
The collected operating state and fault state of the PCS device are all uploaded to the EMS system.
And setting current and voltage limits of the collected current and voltage data on the direct current side of the PCS unit, and uploading abnormal data to the EMS system when the current and voltage limits are higher or lower than the limits.
And uploading 'and' data to an EMS system about the collected active power and reactive power of the direct current side of the PCS unit.
The local controller collects data such as alternating current side current, voltage and power factor, active power and reactive power are obtained through calculation in the device, and the active power and the reactive power are uploaded to the EMS system.
And uploading the lowest residual capacity level of the single batteries in each battery cluster and the charge state of the whole battery cluster during daily operation according to the collected SOC data.
The local controller collects internal environment data of the battery container and the variable flow container, such as temperature and humidity, smoke sensation, entrance guard state, air conditioner running state and the like, sets limit values about the temperature and humidity data, and sends abnormal states to the EMS system. Regarding smoke detection and entrance guard state data, only when the smoke detection starts and opens the door, the data is uploaded to the EMS system. As for the air conditioner operation state data, the data is uploaded to the EMS system only when the air conditioner is stopped.
The preventive alarm and trip of the invention are as follows:
the local controller adopts a scoring early warning tripping method, scores the collected data according to the scoring system in the table 1 and grades, generates a total score in the local controller every 5 seconds, and realizes the control of the local controller on the energy storage subsystem according to the grading control method of the total score in the table 2.
When one local controller controls a plurality of energy storage battery cabins simultaneously, each energy storage battery cabin is respectively subjected to scoring and total scoring grading control, and only abnormal energy storage battery cabins act when alarming and tripping.
TABLE 1 collected data scoring sheet
TABLE 2 general points grading control method TABLE
Example 2
A500 MW/1000MWh power plant side energy storage power station is built, 150 PCS containers of 3.34MW and 300 battery containers of 1.68MW/3.34MWh are expected to be built on the energy storage side, each local controller monitors 5 PCS containers and 10 battery containers, and 30 local controllers are configured.
Each local controller can independently monitor each battery container, the power failure range is effectively reduced, and the accident occurrence probability can be effectively reduced by using a scoring early warning tripping method and a total scoring level tripping method.
Claims (10)
1. The utility model provides a take energy storage system local controller of control logic function, is applied to each energy storage subsystem in the energy storage power station which characterized in that: the local controller integrates a data acquisition unit, a data analysis processing unit and a data transmission unit, realizes the functions of data acquisition, network monitoring, network data analysis and data uploading,
the data acquisition unit is respectively connected with the BMS system, the PCS system and the protection measurement and control device in the alternating current power distribution cabinet, and the information acquired by the data acquisition unit comprises battery temperature, charging state, discharging state, charging lockout, discharging lockout, battery charge state, alternating current/direct current side current and voltage;
the data analysis processing unit analyzes and processes the acquired data and judges the states of the battery and the PCS;
the data transmission unit is connected with the EMS system, uploads a data analysis and processing result, and sends an abnormal signal to the BMS system or the PCS system when the battery or the PCS system is abnormal so as to trip and stop the energy storage subsystem; the EMS system monitors the energy storage subsystem according to the real-time data provided by the local controller, and when the local controller has a fault, the EMS system takes over the analysis and processing function.
2. The energy storage system local controller with control logic function according to claim 1, characterized in that: the local controller is installed in a converter container PCS device cabinet, and is configured with a network switch for interconnection with a PCS system and a BMS system.
3. The energy storage system local controller with control logic function according to claim 1, characterized in that: the network communication connection mode of the local controller and the EMS system adopts the following steps: and the local controller leads two paths of optical cables to be connected to an EMS system in an EMS system control cabinet in the master control container.
4. The local controller with control logic function for energy storage system according to claim 1, wherein: the local controller and PCS have a network communication connection mode: the PCS adopts two paths of Ethernet lines to be connected to a network switch and then is connected to a local controller through the two paths of Ethernet lines by the network switch, if the local controller controls n PCS units together, the PCS units are connected with the PCS units independently, and the PCS units are not interconnected.
5. The energy storage system local controller with control logic function according to claim 1, characterized in that: the network communication connection mode between the local controller and the BMS system is as follows: the battery container battery cluster is internally connected in series by adopting Ethernet cables, two paths of Ethernet cables are led to a network switch by taking the battery cluster as a unit, the network switch is connected to a local controller by adopting the two paths of Ethernet cables, and if the local controller is connected with n battery containers in total, the local controller is independently connected with each battery container, and the containers are not interconnected.
6. The energy storage system local controller with control logic function according to claim 1, characterized in that: the connection mode of the local controller and the protection measurement and control device is as follows: the protection measurement and control device is connected to a network switch by adopting two Ethernet lines and then connected to a local controller by the network switch through the two Ethernet lines, and the local controller collects the bus voltage and the outgoing line current of the low-voltage alternating-current side through a control cable; if the local controller is connected with n protection measurement and control devices, the local controller is independently connected with each protection measurement and control device, and the devices are not interconnected.
7. The local controller with control logic function for energy storage system according to claim 1, wherein: the local controller hardware configuration includes:
a CPU plug-in unit for integrating data analysis and processing unit;
the power supply plug-in is used for configuring a power supply of the device and sending out an alarm signal when the device fails;
three telemetering measurement plug-ins are used for collecting the current and voltage analog value of the alternating current side;
the four remote signaling quantity plug-ins are used for collecting the position switching value of the circuit breaker on the alternating current side;
the network port connecting plug-in is configured with not less than 3 Ethernet ports, is used for connecting with a switch and receiving collected data from a PCS and BMS system;
the optical interface connecting plug-in is configured with at least 4 optical fiber interfaces and is used for connecting with an EMS system and transmitting and processing data;
the group of storage devices are used for storing the acquired data and the analysis processing result;
one group of indicator lamps comprise a device operation indicator lamp, a device fault indicator lamp, a device alarm indicator lamp and a device resetting indicator lamp, and the other group of indicator lamps are all cabin operation indicator lamps;
a set of buttons;
a display;
a housing for mounting the components.
8. The energy storage system local controller with control logic function according to claim 1, characterized in that: the local controller collects the data of the temperature of the single battery, the voltage of the battery, the insulation resistance, the charging state, the discharging state, the charging lockout, the discharging lockout, the chargeable amount, the dischargeable amount, the chargeable power, the dischargeable power and the current of the series loop collected by the BMS system, analyzes and summarizes the data and then uploads the data to the EMS system;
the local controller collects the operation state, fault state, direct-current side current, voltage, active power, reactive power and battery state of charge (SOC) data of the PCS device, which are collected by the PCS system, analyzes and summarizes the data and then uploads the data to the EMS system;
the local controller collects current, voltage and power factor data of an alternating current side, calculates active power and reactive power in the device, and uploads the active power and the reactive power to an EMS system;
the local controller collects internal environment data of the battery container and the variable flow container, such as temperature and humidity, smoke sensation, entrance guard state and air conditioner running state, sets limit values about the temperature and humidity data, and sends abnormal states to the EMS system.
9. The local controller with control logic function for energy storage system according to claim 8, wherein:
uploading the temperatures of two single batteries with higher temperature in each battery cluster during daily operation, setting a battery temperature limit value, and preferentially uploading the temperature data to an EMS system when the temperature exceeds the limit value;
uploading the highest voltage and the lowest voltage of the single batteries in each battery cluster during daily operation, setting a battery voltage limit value, and preferentially uploading the voltage to an EMS system when the voltage exceeds an upper limit value or a lower limit value;
setting an insulation resistance limit value for the collected insulation resistance data, and uploading only insulation resistance abnormal data to an EMS system;
uploading only the aggregated various battery state quantities to the EMS system with respect to the collected charge state, discharge state, charge closure, and discharge closure data;
uploading the lowest value of the data to an EMS system during daily operation according to the collected chargeable amount, dischargeable amount, chargeable power and dischargeable power data;
setting a current limit value for the collected series loop current data, and uploading only current abnormal data to an EMS system;
the collected operation state and fault state of the PCS device are all uploaded to the EMS system;
setting current and voltage limit values for collected current and voltage data of the direct current side of the PCS unit, and uploading abnormal data to an EMS system when the current and voltage limit values are higher or lower than the limit values;
uploading 'and' data to an EMS system about the collected active power and reactive power of the direct current side of the PCS unit;
uploading the lowest residual capacity level of the single batteries in each battery cluster and the charge state of the whole battery cluster during daily operation according to the collected SOC data;
the data of smoke and entrance guard states are uploaded to an EMS system only when the smoke is started and the door is opened;
as for the air conditioner operation state data, the data is uploaded to the EMS system only when the air conditioner is stopped.
10. The local controller with control logic function for energy storage system according to claim 8, wherein:
the local controller adopts a scoring early warning tripping method, scores collected data according to a specified scoring system according to grades, generates a total score every 5 seconds in the local controller, and realizes the control of the local controller on the energy storage subsystem according to a specified control method for grading the total score; when one local controller simultaneously controls a plurality of energy storage battery cabins, each energy storage battery cabin is respectively subjected to scoring and total-scoring hierarchical control, and only abnormal energy storage battery cabins act when alarming and tripping.
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