Debugging device for energy storage power station system

Abstract

The invention belongs to the technical field of energy storage, and particularly relates to an energy storage power station system debugging device. By integrating a plurality of functional modules including a communication module, a data acquisition module and a state diagnosis module in the energy storage power station system debugging device, when the energy storage power station system needs to be debugged, data and equipment states of subsystems in the energy storage power station system can be automatically obtained; according to the technical scheme, the linkage control of the battery energy storage equipment and the subsystems in the energy storage power station system can be quickly debugged, the problem of low efficiency of manual debugging is effectively solved, and an operator can be helped to quickly position the problem and timely take corresponding countermeasures, so that the operation risk of the system is reduced, and the operation safety of the system is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage, and particularly relates to a debugging device for an energy storage power station system. Background Art

[0002] Electrochemical energy storage power stations with lithium-ion batteries have been widely applied on the grid side. To ensure the normal operation of the energy storage power station, it is necessary to debug the battery energy storage equipment and the linkage control between subsystems within the energy storage power station system to ensure the safe, reliable, and efficient grid connection operation of the entire energy storage power station. When debugging the energy storage power station system, the alarm response time is an important factor. If the energy storage power station system cannot achieve timely alarm response under abnormal conditions during debugging, it may lead to system damage, safety risks, and data loss.

[0003] Currently, the energy storage power station system uses manual methods for whole-station debugging. By manually obtaining equipment data for analysis and comparison, it takes a certain amount of time to identify and process problems and then transmit the alarm to the operator. The debugging efficiency is low, the alarm response time is long, which may lead to the aggravation of problems, and further affect the stability and safety of the system. Summary of the Invention

[0004] The purpose of the present invention is to provide a debugging device for an energy storage power station system to solve the problems of low debugging efficiency and security in the existing debugging technology of energy storage power station systems.

[0005] The present invention provides a debugging device for an energy storage power station system to solve the above technical problems, including: a communication module, a data acquisition module, and a status diagnosis module; the communication module includes multiple physical interfaces for communicating with each subsystem within the energy storage power station system; the data acquisition module is used to automatically acquire the data of each subsystem within the energy storage power station system; the status diagnosis module is used to determine whether the subsystems within the energy storage power station system are abnormal according to the acquired data.

[0006] Further, the debugging device for the energy storage power station system is used to implement at least one of the functions of battery system debugging function, communication debugging function, and fire linkage function; the battery system debugging function is used to diagnose the battery system according to the operating status of the battery energy storage equipment in the battery system, the communication debugging function is used to diagnose the communication between the BMS and the EMS, PCS, fire protection, and air conditioning systems; the fire linkage function is used to diagnose whether the linkage control of the BMS on the fire protection system is correct.

[0007] Further, the battery system debugging function includes a battery pack debugging function, a battery cluster debugging function, and a battery stack debugging function.

[0008] Further, the fire linkage function is used to diagnose whether the BMS's linkage control over the start / stop of air conditioners, the start / stop of exhaust fans, the spraying during fire actions, and the on / off of non-fire power supply inlets is correct.

[0009] Further, the energy storage power station system debugging device can also implement the protection threshold and action correctness debugging function, which is used to detect the trigger threshold, duration of fault alarms, and whether the BMS protection actions are correct.

[0010] Further, during debugging, the protection threshold and action correctness debugging function customizes and sets the warning thresholds at all levels of faults for detection, and after debugging, the energy storage power station system debugging device restores the warning thresholds at all levels to the factory settings.

[0011] Further, it also includes a human-machine interface, which is used to display the data and detection results sent by each subsystem within the energy storage power station system, and to send commands to the energy storage power station system.

[0012] Further, the communication module includes a CAN communication interface, an RS485 communication interface, and an Ethernet communication interface.

[0013] Further, the energy storage power station system debugging device also includes a protocol analysis module, which is used to perform protocol analysis on the communication protocols of different communication interfaces in the communication module.

[0014] Further, the energy storage power station system debugging device also includes a fault alarm module, which is used to give fault alarms based on the detected abnormal data.

[0015] The beneficial effects of the above technical solutions are as follows: The energy storage power station system debugging device of the present invention integrates multiple functional modules such as a communication module, a data acquisition module, and a status diagnosis module. It can automatically obtain the data and equipment status of each subsystem within the energy storage power station system, quickly debug the battery energy storage equipment within the energy storage power station system and the linkage control between each subsystem, effectively solve the problem of low efficiency of manual debugging, help operators quickly locate problems, and take corresponding countermeasures in a timely manner, thereby reducing the system operation risk and improving the safety of system operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the hardware structure of the debugging device in an embodiment of the energy storage power station system debugging device of the present invention;

[0017] Figure 2 is a schematic diagram of the specific architecture of the debugging device in an embodiment of the energy storage power station system debugging device of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0018] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0019] The energy storage power station system debugging device ESDT provided by the present invention integrates multiple functional modules such as a communication module, data acquisition, and status diagnosis, and is applicable to energy storage power station systems with lithium batteries and lead-acid batteries as energy storage elements. When the energy storage power station system needs to be debugged, the ESDT is connected to the subsystems within the energy storage power station system, and the data of each subsystem is quickly and automatically read, so as to quickly complete the debugging of the entire station and protect the safety of the battery energy storage equipment within the system.

[0020] Embodiment of the energy storage power station system debugging device of the present invention

[0021] As Figure 1 and 2 shown, the ESDT adopts a two-layer architecture of a host computer and a slave computer, and the host computer communicates with the slave computer through Ethernet. In this embodiment, the host computer is a notebook computer pre-installed with the windows system. The ESDT includes a communication module, a processing unit, a human-machine interface HMI, a digital quantity detection circuit, and a dry contact output.

[0022] Among them, the communication module includes: a CAN communication interface, an RS485 communication interface, an Ethernet communication interface, and a USB interface, which are used for communication between the ESDT and the subsystems within the energy storage power station system.

[0023] The human-machine interface HMI: is used to display the data and detection results sent by each subsystem within the energy storage power station system, and to send debugging commands to the energy storage power station system to be debugged. Among them, the subsystems within the energy storage power station system include: a battery management system BMS, a power conversion system PCS, an energy management system EMS, fire protection and air conditioning, and the BMS includes a battery cell management module BMM, a battery cluster management module ESBCM, and a battery system management unit ESMU.

[0024] The processing unit includes: a data acquisition module, a protocol analysis module, a status diagnosis module, and a fault alarm module.

[0025] Specifically, the data acquisition module is communicatively connected to the energy storage power station system through the communication module, and can simultaneously collect the data of subsystems such as the battery management system BMS, the power conversion system PCS, the energy management system EMS, fire protection and air conditioning in the energy storage power station, realizing automatic data acquisition. These data include, but are not limited to, data such as single battery voltage, single battery temperature, battery cluster voltage, battery cluster current, battery pole temperature, battery loop current, battery pack terminal voltage, and communication messages between subsystems.

[0026] The protocol analysis module is used to analyze the communication protocols of different communication interfaces used by each subsystem in the communication module to ensure the accurate interpretation of data.

[0027] The status diagnosis module performs status analysis based on the collected data, is used to identify the operating status of the battery energy storage devices in the battery system in real time, diagnose whether the battery system is abnormal according to the operating status, and supports debugging functions such as the fault detection of the BMS control function for the fire protection system and the communication fault diagnosis between the BMS and the EMS, PCS, fire protection, and air conditioning systems;

[0028] The fault alarm module issues timely audible and visual fault alarms on the spot for the detected faults based on the monitored abnormal data according to the preset thresholds, helps the operator quickly identify the faults to achieve the rapid handling of the faults, and reduces the debugging risk.

[0029] Based on the above settings, the ESDT supports the battery system debugging function, communication debugging function, fire protection linkage function, protection threshold and action correctness debugging function. The battery system debugging function includes the battery pack debugging function, battery cluster debugging function, and battery stack debugging function, and generates and exports the debugging results in the form of a report. In other embodiments, other methods can be used to export the results.

[0030] Specifically, the battery pack debugging function includes:

[0031] 1) Support the detection of the voltage and temperature of individual cells in the battery pack, and support the calculation and display of the battery pack voltage;

[0032] 2) Support the detection of disconnection faults of the voltage and temperature of individual cells;

[0033] 3) Support the alarm of short circuit and reverse polarity connection faults of individual cells in the battery pack;

[0034] 4) Support the overvoltage and undervoltage alarms of the individual cell voltages in the battery pack, and the high temperature and low temperature alarms of individual cells.

[0035] The implementation method of the battery pack debugging function: The ESDT directly accesses the BMS internal bus to communicate with the BMS, automatically collects the voltages and temperatures of the individual cells in the battery pack obtained by the BMS, and realizes the detection of disconnection faults of the voltage and temperature of individual cells; and calculates the battery pack voltage, compares it with the set normal value to determine whether it is abnormal, and performs alarms for short circuit, reverse polarity connection, overvoltage, and undervoltage of individual cells in the battery pack according to the corresponding voltage abnormalities, and performs high temperature and low temperature alarms for individual cells according to the corresponding temperature abnormalities.

[0036] The battery cluster debugging function includes:

[0037] 1) Support the detection of the voltage of individual cells within a battery cluster, the voltage and temperature of individual cells, the voltage of the battery cluster, the current of the battery cluster, and the insulation of the battery cluster;

[0038] 2) Support the detection of disconnection faults of the voltage and temperature of individual cells;

[0039] 3) Support the alarm of short - circuit and reverse - polarity connection faults of individual cells within the battery cluster, and support the alarm of reverse - polarity connection faults of battery packs within the battery cluster;

[0040] 4) Support the alarms of over - voltage and under - voltage of the voltage of individual cells within the battery cluster, over - high and over - low voltage of the battery cluster, over - current of the battery - cluster current, high temperature and low temperature of individual cells;

[0041] 5) Support the alarms of faults such as battery - cluster contactors and fuses.

[0042] The implementation method of the battery - cluster debugging function: The ESDT is directly connected to the internal bus of the BMS for communication with the BMS, automatically collecting the voltage and temperature of individual cells within the battery cluster, the voltage of the battery cluster, the current of the battery cluster, the insulation of the battery cluster, and the states of components within the battery cluster such as contactors and fuses obtained by the BMS, to achieve the detection of disconnection faults of the voltage and temperature of individual cells; and compare them with the set normal values to determine whether they are abnormal, and based on the corresponding voltage and current abnormalities, give alarms for short - circuit, reverse - polarity connection, over - voltage, and under - voltage of individual cells within the battery cluster, alarm for reverse - polarity connection faults of battery packs within the battery cluster, alarms for over - high and over - low voltage of the battery cluster, and battery - cluster current alarm; based on the corresponding temperature abnormalities, give alarms for high temperature and low temperature of individual cells; judge whether there are faults according to the states of contactors and fuses within the battery cluster and give alarms.

[0043] The battery - stack debugging function includes:

[0044] 1) Support the detection of the voltage of individual cells of the battery stack, the temperature of individual cells, the voltage of the battery cluster, the current of the battery cluster, and the insulation of the battery stack;

[0045] 2) Support the detection of disconnection faults of the voltage and temperature of individual cells in the battery cluster;

[0046] 3) Support the diagnosis and alarm of reverse - polarity connection of the battery cluster;

[0047] 4) Support the alarms of over - voltage and under - voltage of the voltage of individual cells in the battery cluster, over - high and over - low voltage of the battery cluster, over - current of the battery - cluster current, high temperature and low temperature of individual cells;

[0048] 5) Support the alarms of faults such as battery - cluster contactors and fuses.

[0049] Implementation method of battery stack commissioning function: ESDT is directly connected to the internal bus of BMS for communication with BMS, automatically collecting the voltage and temperature of single cells in the battery stack obtained by BMS, the voltage and current of battery clusters, the insulation of the battery stack, and the status of components in the battery cluster such as contactors and fuses, to achieve the detection of disconnection faults of the voltage and temperature of single cells in the battery stack; successively closing the high-voltage box switches of battery clusters, automatically reading and comparing the DC busbar voltages of the measurement busbar cabinet when different high-voltage box switches of battery clusters are closed, to judge whether the polarities and voltage differences of battery clusters meet the requirements, and to achieve the diagnosis of reverse connection of battery cluster polarities; the implementation methods of the disconnection fault detection of the voltage and temperature of single cells in the battery cluster, the overvoltage and undervoltage of the voltage of single cells in the battery cluster, the overhigh and overlow of the battery cluster voltage, the overcurrent of the battery cluster current, the high-temperature and low-temperature alarms of single cells, and the fault alarms of contactors and fuses in the battery cluster are the same as those of the battery cluster commissioning function, which will not be described here.

[0050] The communication commissioning function includes:

[0051] 1) Support the communication fault diagnosis function between BMS and PCS;

[0052] 2) Support the communication fault diagnosis function between BMS and fire protection;

[0053] 3) Support the communication fault diagnosis function between BMS and air conditioner;

[0054] 4) Support the communication fault diagnosis function between BMS and EMS;

[0055] 5) Support the generation and export of the report on the debugging results of the communication function;

[0056] Implementation method of the communication commissioning function: ESDT obtains the communication messages between the above-mentioned subsystems and detects whether the messages are normal.

[0057] The fire linkage function includes:

[0058] Support the fault detection of the BMS control function for the fire protection system, where the BMS control function for the fire protection system includes: the control functions of BMS for the start and stop of air conditioners, the start and stop of exhaust fans, the spraying of fire actions, and the on-off of non-fire power supply inlets.

[0059] Implementation method of the fire linkage function: ESDT outputs the fire warning, fire start, and fire fault signals to BMS through the digital quantity detection circuit, and ESDT monitors and judges whether the control actions of BMS for the start and stop of air conditioners, the start and stop of exhaust fans, the spraying of fire actions, and the on-off status of non-fire power supply inlets are correct.

[0060] ESDT can also verify the correctness of BMS criteria. The battery system management unit ESMU uploads the dry contact output status corresponding to the start / stop of the exhaust fan, the fire sprinkler operation, and the on / off of the non-fire power supply incoming line to ESDT via the CAN bus. ESDT analyzes and processes this data to obtain the criterion result, and compares and analyzes the obtained criterion result with the BMS criterion result to verify the correctness of the BMS criterion.

[0061] When there is a communication failure between the BMS and the fire protection host but the failure cannot be located, ESDT communicates with the fire protection host on the one hand and with the BMS on the other hand, and locates and identifies the failure point based on the communication results.

[0062] The protection threshold and action correctness debugging function includes:

[0063] 1) Support the detection of the trigger threshold, duration, and whether the BMS protection action is correct for the three-level alarms of faults such as too high single-cell voltage, too low single-cell voltage, too large single-cell voltage difference, too high single-cell temperature during battery charging, too low single-cell temperature during battery charging, too high single-cell temperature during battery discharging, too low single-cell temperature during battery discharging, too large single-cell temperature difference, too low SOC, too high total voltage, too low total voltage, overcurrent during discharging, overcurrent during charging, and too low insulation resistance value.

[0064] 2) Support the detection of the trigger threshold, duration, and whether the BMS protection action is correct for the three-level alarms of faults such as single-cell voltage acquisition failure and single-cell temperature acquisition failure.

[0065] 3) Support the detection of the trigger threshold, duration, and whether the BMS protection action is correct for the second-level alarm of the temperature rise fault.

[0066] The implementation method of the protection threshold and action correctness debugging function: Test with each battery cluster as a unit, customize the alarm thresholds at all levels of faults, simulate faults, judge whether the alarm trigger threshold, duration, and BMS protection action of the corresponding faults are correct, and the debugging results support report generation and export. After the debugging is completed, for each protection threshold modified during the fault simulation process, ESDT restores the threshold to the factory default state.

[0067] The commissioning device for the energy storage power station system of the present invention can automatically obtain the data and equipment status of each subsystem within the energy storage power station system, quickly perform on-site perception, data analysis and diagnosis, and fault alarm for typical battery safety faults that occur during the commissioning process such as reverse battery polarity connection, electrode short circuit, and battery overheating, as well as perform linkage commissioning with each subsystem of the energy storage system, effectively solving the problem of low efficiency of manual commissioning. It can help operators quickly locate problems and take corresponding countermeasures in a timely manner, thereby reducing the system operation risk and improving the safety of system operation. The recognition and alarm time for commissioning faults such as battery overcurrent is less than 5 s, and the alarm time for safety faults such as battery smoking and fire during the commissioning process is less than 30 s; the alarm time for safety faults such as battery overheating and fire is less than 20 s. It greatly reduces the setting of the fault alarm response duration, improves the safety of the system, and prevents further damage or danger to the energy storage power station system.

Claims

1. An energy storage power station system debugging device, characterized in that, it includes: A communication module, a data acquisition module and a status diagnosis module; the communication module includes multiple physical interfaces for communicating with each subsystem in the energy storage power station system; The data acquisition module is used to automatically acquire the data of each subsystem in the energy storage power station system; the status diagnosis module is used to judge whether the subsystems in the energy storage power station system are abnormal according to the acquired data.

2. The energy storage power station system debugging device according to claim 1, characterized in that, The energy storage power station system debugging device is used to implement at least one of the functions of battery system debugging function, communication debugging function and fire linkage function; the battery system debugging function is used to diagnose the battery system according to the operating status of the battery energy storage equipment in the battery system, and the communication debugging function is used to diagnose the communication between the BMS and the EMS, PCS, fire protection and air conditioning systems; the fire linkage function is used to diagnose whether the BMS's linkage control of the fire protection system is correct.

3. The energy storage power station system debugging device according to claim 2, characterized in that, The battery system debugging function includes battery pack debugging function, battery cluster debugging function and battery stack debugging function.

4. The energy storage power station system debugging device according to claim 2, characterized in that, The fire linkage function is used to diagnose whether the BMS's linkage control of the start and stop of the air conditioner, the start and stop of the exhaust fan, the spraying of fire protection actions and the on-off of the non-fire power supply incoming line is correct.

5. The energy storage power station system debugging device according to claim 2, characterized in that, The energy storage power station system debugging device can also implement the protection threshold and action correctness debugging function, and the protection threshold and action correctness debugging function is used to detect the trigger threshold, duration of the fault alarm and whether the BMS protection action is correct.

6. The energy storage power station system debugging device according to claim 5, characterized in that, When the protection threshold and action correctness debugging function is debugging, the warning thresholds at all levels of faults are customarily set for detection, and after the debugging is completed, the energy storage power station system debugging device restores the warning thresholds at all levels to the factory settings.

7. The energy storage power station system debugging device according to claim 1, characterized in that, It also includes a human-machine interface, and the human-machine interface is used to display the data and detection results sent by each subsystem in the energy storage power station system, and send commands to the energy storage power station system.

8. The energy storage power station system debugging device according to claim 1 or 7, characterized in that, The communication module includes a CAN communication interface, an RS485 communication interface and an Ethernet communication interface.

9. The energy storage power station system debugging device according to claim 8, characterized in that, The energy storage power station system debugging device also includes a protocol analysis module, and the protocol analysis module is used to perform protocol analysis on the communication protocols of different communication interfaces in the communication module.

10. The energy storage power station system debugging device according to claim 1 or 7, characterized in that, The energy storage power station system debugging device also includes a fault alarm module, and the fault alarm module is used to perform fault alarm according to the detected abnormal data.

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