CN116953533A - Storage battery remote nuclear capacity monitoring system based on Internet of things - Google Patents
Storage battery remote nuclear capacity monitoring system based on Internet of things Download PDFInfo
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 56
- 238000012806 monitoring device Methods 0.000 claims abstract description 37
- 238000000034 method Methods 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 14
- 238000004891 communication Methods 0.000 claims abstract description 11
- 230000006855 networking Effects 0.000 claims abstract description 5
- 238000007599 discharging Methods 0.000 claims description 23
- 230000009471 action Effects 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000007667 floating Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 9
- 239000000178 monomer Substances 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 32
- 238000012360 testing method Methods 0.000 description 13
- 238000012423 maintenance Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 8
- 230000004913 activation Effects 0.000 description 4
- 238000003745 diagnosis Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000004458 analytical method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/371—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with remote indication, e.g. on external chargers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/378—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] specially adapted for the type of battery or accumulator
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/389—Measuring internal impedance, internal conductance or related variables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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Abstract
The utility model provides a long-range nuclear appearance monitoring system of battery based on thing networking, includes battery parameter sensor, current measurement unit, battery on-line monitoring device, battery validity monitor, thing networking access node equipment, comprehensive monitoring platform, this system measures battery monomer voltage, utmost point post temperature, monomer internal resistance, group voltage, charge-discharge current and passive balanced, calculates the residual capacity SOC of battery simultaneously and uploads the battery parameter who gathers through communication interface, realizes real-time supervision and the one-key charge-discharge control of battery running state. The remote online capacity checking and state detecting method and device for the transformer substation storage battery pack solve the problems of remote online capacity checking and state detecting of the transformer substation storage battery pack, achieve the effect that the storage battery pack can complete an online capacity checking process in a remote background without separating from a direct current system, and achieve the function of detecting the state of the storage battery in real time.
Description
Technical Field
The invention relates to the field of storage battery monitoring systems, in particular to a storage battery remote nuclear capacity monitoring system based on the Internet of things.
Background
The conventional transformer substation storage battery nuclear capacity needs operation and maintenance personnel and detection personnel to arrive at a transformer substation site to manually carry out nuclear capacity, as shown in fig. 1, a group of standby storage batteries are required to be connected into a direct current system during nuclear capacity, then the storage battery to be tested is withdrawn from the direct current system, a charge and discharge test is manually carried out, and the whole test process is accompanied by repeated storage battery connection and withdrawal operations, so that a certain risk exists for the stability of the direct current system and a risk exists for the safety of personnel.
The difference of the existing remote online capacity checking modes is mainly reflected in a storage battery discharging test link, a mode of disconnecting a charging machine from a storage battery intermediate charging channel and connecting the channel when the charging test is carried out is mostly adopted in the discharging test, so that the storage battery is not separated from a direct current system in the capacity checking process, and the following technical ideas are provided in the storage battery discharging link:
firstly, a remote nuclear capacity state diagnosis device and a diagnosis method (CN 115133162A) of a storage battery are manufactured, when the remote nuclear capacity is realized, operation and maintenance personnel do not need to drive a car to go to a storage battery site for overhauling and detecting, the detection can be directly carried out from a display control module, the real-time monitoring can be carried out, and the abnormality generated in the charging and discharging process of the storage battery can be obtained through data judgment and comparison; meanwhile, whether the storage battery needs to be repaired or replaced is judged, so that the detection efficiency of the battery is improved; the real-time state of the battery can be grasped, and abnormal batteries and failed batteries can be found out. But can not realize remote control of the charge and discharge of the storage battery, and can only detect the state of the storage battery. The second is to provide a remote charge and discharge nuclear capacity monitoring device (CN 114167296A) for the storage battery, which integrates the online measurement function of the battery, realizes the nuclear capacity monitoring of the direct-current storage battery, and realizes the remote operation and maintenance of the storage battery. But cannot implement the one-key control function in the background. Thirdly, a remote monitoring system (CN 114924199A) for the storage battery is provided, and the functional requirements of daily monitoring, predictive early warning, charge and discharge experiments, performance evaluation and the like of the corresponding battery pack can be met. However, the method has relatively complex structure and relatively high software and hardware cost.
Disclosure of Invention
Aiming at the background technology, the invention aims to solve the problems of remote online capacity checking and state detection of the storage battery of the transformer substation, and provides a storage battery remote capacity checking and monitoring system based on the Internet of things, which can realize that the storage battery can complete the online capacity checking process in a remote background without separating from a direct current system and realize the function of detecting the state of the storage battery in real time.
The utility model provides a long-range nuclear appearance monitoring system of battery based on thing networking, includes battery parameter sensor, current measurement unit, battery on-line monitoring device, battery validity monitor, thing networking access node equipment, comprehensive monitoring platform, this system measures battery monomer voltage, utmost point post temperature, monomer internal resistance, group voltage, charge-discharge current and passive balanced, calculates the residual capacity SOC of battery simultaneously and uploads the battery parameter who gathers through communication interface, realizes real-time supervision and the one-key charge-discharge control of battery running state.
Further, the storage battery parameter sensor collects terminal voltage, internal resistance and temperature of each storage battery; the current monitoring device collects the current of the whole group of storage batteries; and uploading the data to an online storage battery monitoring device by using a serial port protocol in a wired mode.
Further, the battery on-line monitoring device communicates with the RS485 interface converter using the modbus protocol.
Further, the storage battery effectiveness monitor is used for realizing on-load discharging of the storage battery, receiving a discharging instruction issued by the access node equipment of the Internet of things, and collecting the resistance of a discharging loop and the voltage drop in the discharging process.
Further, in the storage battery effectiveness monitor, the switch K1 is in a normally closed state, and the storage battery pack is subjected to floating charge through the charger; when the effectiveness of the battery pack is required to be detected, K1 is opened, the charger is disconnected from the storage battery due to the action of the unidirectional-conduction step-down silicon chain Q1, meanwhile, the resistor Q2 generates impact current, a loop is formed with the storage battery and the direct-current bus, equipment and connection lines in the whole loop are detected, at the moment, direct-current load is directly supplied by the storage battery, the whole storage battery pack is discharged, and the discharge is stopped manually or automatically in a set discharge time.
Further, the battery effectiveness monitor communicates with the RS485 interface converter using a battery effectiveness specified time discharge communication protocol.
Further, the RS485 interface converter communicates with the internet of things access node device using tcp protocol.
Further, the access node equipment of the Internet of things uses the mqtt protocol to upload the data of the storage battery on-line monitoring device and the storage battery effectiveness monitor to the comprehensive monitoring platform.
Further, the comprehensive monitoring platform is connected with node equipment through the Internet of things, and remotely controls the storage battery effectiveness monitor to realize monitoring of the whole storage battery pack and remote on-load nuclear capacity discharging; the storage battery monitoring device uploads parameters of voltage and current of a storage battery pack, voltage, internal resistance and temperature of a single battery terminal in real time or at fixed time through the access node equipment of the Internet of things.
The beneficial effects achieved by the invention are as follows:
(1) The storage battery load core capacity abandons the offline test mode of separating the storage battery from the load in the past, and the defects of long time consumption, high strength, low efficiency and the like in the traditional mode are avoided. The discharge of the direct current load in the station is utilized, and the discharge current requirement of I10 can be basically met according to measurement and calculation. After the on-line nuclear capacity test technology of the storage battery is provided, operation and maintenance personnel can remotely or automatically develop the on-line nuclear capacity test of the storage battery in combination with inspection, meanwhile, the operation safety of a direct current system in a station is not influenced, the latent fault of the storage battery can be found in advance, the health level of the storage battery is effectively improved, and the digital conversion quality improvement and efficiency improvement of the power-assisted operation and maintenance work are realized. The method realizes the online automatic, regular and dead-angle-free detection of the problems existing in the loop from the storage battery to the bus, and provides an important guarantee for the safe and reliable operation of the transformer substation.
(2) Parameters of the whole storage battery pack and the single storage battery are uploaded to a monitoring platform in real time, and problems of the batteries are found in time.
(3) The system can effectively monitor the failure condition of the storage battery (such as problems of open circuit of the battery, failure or disconnection of a battery switch, fuse of a battery, corrosion of a connecting wire, fatigue virtual connection and disconnection, disconnection of a cross-layer wire, loosening of a screw, internal damage of a fuse and the like) caused by shutdown or faults of any device from the storage battery to a bus full-loop, and the change condition of the internal resistance of the loop.
(4) The circuit breaker can simulate the simultaneous protection tripping action current of a plurality of circuit breakers (20A is equivalent to the simultaneous tripping of 10 switches), dynamically monitor the voltage fluctuation and the voltage drop of a bus, and ensure that the conventional load is borne while the tripping impact can be met
(5) The method can remotely realize the load discharge of the storage battery, and judge the performances of the single battery and the storage battery pack in the discharge process.
(6) The remote monitoring of the storage battery pack is realized through the access node equipment, the platform is managed in a unified way, the platform is monitored comprehensively, and the remote monitoring is carried out on the storage battery effectiveness monitor and the storage battery on-line monitoring device through the access node equipment of the station. The storage battery online monitoring data are uploaded through the intranet, so that the continuity of the online monitoring data is guaranteed, the safety protection level is improved, and the equipment safety, the service safety and the information safety are powerfully guaranteed.
Drawings
Fig. 1 is a schematic diagram of a conventional core-capacitor in the background art.
Fig. 2 is a schematic diagram of a remote nuclear capacity monitoring system for a storage battery according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a battery effectiveness monitor in an embodiment of the present invention.
Fig. 4 is a schematic diagram of an on-line monitoring device for a storage battery according to an embodiment of the invention.
Fig. 5 is a schematic diagram of a battery parameter sensor in an embodiment of the invention.
Fig. 6 is a communication architecture diagram in an embodiment of the invention.
Fig. 7 is a charge-discharge flow chart of the battery effectiveness detection system according to the embodiment of the invention.
Fig. 8 is a diagram of a platform pre-discharge interface in an embodiment of the invention.
Fig. 9 is a diagram of an interface in platform discharge in an embodiment of the invention.
Fig. 10 shows an indication of a dc-screen instrument on the site of a substation (in the case of a battery load discharge) in an embodiment of the present invention.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the attached drawings.
The invention provides a remote nuclear capacity monitoring system of a storage battery, which is formed by adding a storage battery intelligent parameter sensor, a current measuring unit, a storage battery on-line monitoring device, a storage battery effectiveness monitor, an Internet of things access node device, a comprehensive monitoring platform and the like on the basis of an original direct current system, and has the functions of measuring the single voltage, the temperature of a pole, the internal resistance of the single body, the voltage of a group, the charge and discharge current and passive equalization, and can calculate the residual capacity (SOC) of the storage battery and upload the acquired storage battery parameters to a server or a control system platform through LAN (local area network) and RS485 interfaces, thereby realizing the real-time monitoring and one-key charge and discharge control of the running state of the storage battery.
The storage battery parameter sensor collects terminal voltage, internal resistance and temperature of each storage battery; the current monitoring device collects the current of the whole group of batteries; and uploading the data to an online storage battery monitoring device by using a serial port protocol in a wired mode. The storage battery on-line monitoring device uses a modbus protocol to communicate with the RS485 interface converter.
The storage battery effectiveness monitor is used for carrying and discharging the storage battery, receiving a discharging instruction issued by a background, and collecting the resistance of a discharging loop and the voltage drop in the discharging process. The effectiveness monitoring device communicates with the RS485 interface converter using a battery effectiveness specified time discharge communication protocol.
The RS485 interface converter communicates with the access node devices using tcp protocol.
The access node equipment uses the mqtt protocol to upload the data of the storage battery on-line monitoring device and the storage battery effectiveness monitor to the storage battery effectiveness detection system.
The comprehensive monitoring platform is connected with node equipment through a station end, and remotely controls a storage battery effectiveness monitor to realize monitoring of the whole storage battery pack and remote on-load nuclear capacity discharging; the storage battery monitoring device can upload parameters such as storage battery voltage, current and the like of the storage battery pack in real time or at fixed time through the access node equipment, such as voltage, internal resistance, temperature and the like of a single battery terminal.
The invention can realize the following functions:
(1) Monitoring the internal resistance, terminal voltage, temperature and the like of the single storage battery;
(2) Monitoring the voltage and the current of a direct current system of the storage battery;
(3) Monitoring the failure condition of the storage battery caused by the shutdown or the fault of any device from the storage battery to the bus full loop;
(4) Simulating a plurality of circuit breakers to simultaneously protect tripping action current, and dynamically monitoring busbar voltage fluctuation and voltage drop;
(5) Remote load discharging operation of the storage battery is realized.
Referring to fig. 3 under the normal working condition of the storage battery effectiveness monitor, K1 is in a normally closed state, and the storage battery pack is float charged by the charger. When the effectiveness of the battery pack is required to be detected, K1 is opened, a charger is disconnected from a storage battery under the action of a voltage-reducing silicon chain (one-way conduction) Q1, meanwhile, a resistor Q2 generates impact current, a loop is formed by the storage battery and a direct current bus, equipment and a connecting line in the whole loop are detected, at the moment, direct current load is directly supplied by the storage battery, the whole storage battery pack is discharged, and in a set discharging time (1-60 minutes), after a voltage difference of 30V (maximum value) is formed between the voltage of the storage battery pack and the voltage of the charger, the discharging is automatically stopped; if the discharge time is within, the power-on operation can be stopped according to the requirements; the discharge time can also be set on the monitoring platform, and the storage battery pack stops discharging after the discharge time is reached. In the operation process of the storage battery effectiveness monitor, the storage battery online monitoring device uploads the performance parameters of a single battery in real time, and the existing problem of the battery is judged. The system can automatically and periodically or manually start to comprehensively check the actual failure condition of the storage battery (such as open circuit, fault or disconnection of a battery switch, fuse breaking of a battery, falling of a connecting wire, broken line of a cross-layer wire, loosening of a screw and the like in a direct current system), timely find the action of the storage battery separating from a bus, verify whether the system can bear normal load, timely send out an alarm and ensure the operation safety of the system.
On the premise of ensuring the bus power supply, the storage battery is not required to be separated from a charger, a storage battery and parameters and communication interface support are not required to be changed, the storage battery is enabled to be loaded independently through a voltage-reducing silicon chain in the switching device, the detection of the effectiveness of the storage battery and the tolerance test of the storage battery to impact load are intelligently completed by combining the parameters such as the dropping rate of the bus voltage and the load current, and important technical support is provided for improving the safety of direct current power supply.
The storage battery on-line monitoring device can automatically monitor the voltage, the internal resistance and the temperature of the single battery on line (the intelligent parameter sensor of the storage battery is needed to be configured); the voltage, charge and discharge current, floating current, ripple coefficient and environmental temperature function (the voltage and current monitoring device of the group is required to be configured) of the battery pack can be automatically detected on line; the system has the online equalization function of the storage battery (intelligent parameter sensor of the storage battery needs to be configured); the method has the online sulfur removal and activation functions of the storage battery (the storage battery activation unit is required to be configured for use); the device has the control and access functions of a supporting opening and closing unit, an insulation monitoring unit and a constant current discharge unit; built-in battery performance analysis expert diagnosis models, monitoring the residual capacity (SOC) and the service life estimation (SOH) of single batteries, accurately judging the battery performance, and giving maintenance suggestions of each battery; the device has the functions of automatically and manually starting internal resistance measurement, and the measurement interval can be set; the device has the functions of automatically recording and recording the charge and discharge process and supporting and exporting charge and discharge data; the device equipment has the functions of displaying and setting keys by the dot matrix LCD; the device has a fault battery exit function, and after the function sets a battery number, the battery only displays related data, but does not make alarm judgment and prompt; the system has the function of importing and exporting data; the total number of the monitored batteries of each device is 440, and 4 groups of storage batteries can be managed in a supported mode at maximum; the automatic alarm device has the automatic alarm function: the automatic alarm device has the functions of automatic alarm and over-limit automatic alarm when the internal resistance of the single body, the voltage of the single body, the temperature of the battery, the voltage of the group, the charge and discharge current and the ambient temperature exceed the limit, and the alarm threshold value can be set. When the alarm occurs, the red alarm lamp of the device is on, and the dry contact is closed, so that specific alarm content can be inquired through the device; the device has a self-checking function, when the system fails, the device gives out a fault signal alarm prompt, and the normal operation of the backup power system is never affected, so that the reliability of the system is ensured; the device is provided with a 4-path SBUS acquisition interface, 2 RS485 interfaces and 1 network port, supports MODBUS/RTU, MODBUS/TCP and TCP/IP protocols, and has customizable communication protocol; the device is provided with two dry contacts, one is a device fault contact and the other is a battery alarm contact.
The storage battery parameter sensor can automatically monitor the voltage, the internal resistance and the temperature of the single battery on line (the intelligent parameter sensor of the storage battery is required to be configured); the device can automatically detect the voltage, charge and discharge current, floating current, ripple coefficient and environmental temperature function (the voltage and current monitoring device of the group is required to be configured) of the battery pack on line; the device has the online equalization function of the storage battery (the intelligent parameter sensor of the storage battery needs to be configured); the device has the on-line sulfur removal and activation function of the storage battery (the storage battery activation unit is required to be configured for use); the device has the control and access functions of a supporting opening and closing unit, an insulation monitoring unit and a constant current discharge unit; the device is internally provided with a storage battery performance analysis expert diagnosis model, monitors the residual capacity (SOC) and the service life estimation (SOH) of the single battery, accurately judges the battery performance, and gives maintenance suggestions of each battery; the device has the functions of automatically and manually starting internal resistance measurement, and the measurement interval can be set; the device has the functions of automatically recording and recording the charge and discharge process and supporting and exporting charge and discharge data; the device equipment has the functions of displaying and setting keys by the dot matrix LCD; the device has a fault battery exit function, and after the function sets a battery number, the battery only displays related data, but does not make alarm judgment and prompt; a data import and export function; the total number of the monitored batteries of each device is 480, and 10 groups of storage batteries can be managed in a supported mode at maximum; the automatic alarm device has the automatic alarm function: the automatic alarm device has the functions of automatic alarm and over-limit automatic alarm when the internal resistance of the single body, the voltage of the single body, the temperature of the battery, the voltage of the group, the charge and discharge current and the ambient temperature exceed the limit, and the alarm threshold value can be set. When the alarm occurs, the red alarm lamp of the device is on, and the dry contact is closed, so that specific alarm content can be inquired through the device; the device has a self-checking function, when the system fails, the device gives out a fault signal alarm prompt, and the normal operation of the backup power system is never affected, so that the reliability of the system is ensured; 4 paths of SBUS acquisition interfaces, 2 RS485 interfaces and 1 network port are configured, MODBUS/RTU, MODBUS/TCP and TCP/IP protocols are supported, and communication protocols can be customized; two dry contacts are provided, one being a device failure contact and the other being a battery alarm contact.
The function of the RS485 interface converter is that the data of the network port and the serial port are converted, referring to fig. 6, the access equipment is connected with the RS485 interface converter by using the network port, and the data is sent to the RS485 interface converter by using the network port. The RS485 converter is connected with the availability monitoring device and the storage battery on-line monitoring device through 485 ports, converts received network port data into serial port data and sends the serial port data to the availability monitoring device and the storage battery on-line monitoring device through 485 ports. The data process sent by the validity monitoring device and the storage battery online monitoring device to the access equipment is opposite to the above.
The storage battery on-line monitoring device uses a modbus protocol to communicate with the RS485 interface converter. The effectiveness monitoring device communicates with the RS485 interface converter using a battery effectiveness specified time discharge communication protocol. The RS485 interface converter communicates with the access device using tcp protocol.
The access device sends the received data to the platform using the mqtt protocol.
The comprehensive monitoring platform is an application program of an Internet of things management platform, the on-load nuclear capacity test is realized through a start-stop station effectiveness monitoring device instrument, important parameters such as single-section voltage, internal resistance and temperature of a battery can be monitored on a platform interface, and the remote control is performed through setting discharge cut-off voltage and discharge duration. When a 'start discharging' button is clicked, the storage battery discharges a direct current load in the station, and when the discharge set time length or the cut-off voltage is reached, the system automatically stops discharging; when the 'stop discharging' button is clicked, the system stops discharging emergently and resumes the normal operation mode of the charger. The charge-discharge flow is specifically referred to fig. 7.
The storage battery load core capacity abandons the offline test mode of separating the storage battery from the load in the past, and the defects of long time consumption, high strength, low efficiency and the like in the traditional mode are avoided. The discharge of the direct current load in the station is utilized, and the discharge current requirement of I10 can be basically met according to measurement and calculation. After the on-line nuclear capacity test technology of the storage battery is provided, operation and maintenance personnel can remotely or automatically develop the on-line nuclear capacity test of the storage battery in combination with inspection, meanwhile, the operation safety of a direct current system in a station is not influenced, the latent fault of the storage battery can be found in advance, the health level of the storage battery is effectively improved, and the digital conversion quality improvement and efficiency improvement of the power-assisted operation and maintenance work are realized. The method realizes the online automatic, regular and dead-angle-free detection of the problems existing in the loop from the storage battery to the bus, and provides an important guarantee for the safe and reliable operation of the transformer substation.
Parameters of the whole storage battery pack and the single storage battery are uploaded to a monitoring platform in real time, and problems of the batteries are found in time.
The system can effectively monitor the failure condition of the storage battery (such as problems of open circuit of the battery, failure or disconnection of a battery switch, fuse of a battery, corrosion of a connecting wire, fatigue virtual connection and disconnection, disconnection of a cross-layer wire, loosening of a screw, internal damage of a fuse and the like) caused by shutdown or faults of any device from the storage battery to a bus full-loop, and the change condition of the internal resistance of the loop.
The circuit breaker can simulate the simultaneous protection tripping action current of a plurality of circuit breakers (20A is equivalent to the simultaneous tripping of 10 switches), dynamically monitor the voltage fluctuation and the voltage drop of a bus, and ensure that the conventional load is borne while the tripping impact can be met
The method can remotely realize the load discharge of the storage battery, and judge the performances of the single battery and the storage battery pack in the discharge process.
The remote monitoring of the storage battery pack is realized through the access node equipment, the platform is subjected to unified management, the comprehensive monitoring platform is accessed into the node equipment through the station, the storage battery effectiveness monitor and the storage battery on-line monitoring device are subjected to remote monitoring, the storage battery pack can be detected according to the requirements of operation and maintenance personnel, and meanwhile, the parameters of the storage battery can be uploaded in real time. Referring to fig. 8-9, statistics and analysis of internal resistance, float voltage, current and temperature data of different types of storage battery cells can be performed to find problems existing in the storage battery pack and the single battery in time. The storage battery online monitoring data are uploaded through the intranet, so that the continuity of the online monitoring data is guaranteed, the safety protection level is improved, and the equipment safety, the service safety and the information safety are powerfully guaranteed.
The above description is merely of preferred embodiments of the present invention, and the scope of the present invention is not limited to the above embodiments, but all equivalent modifications or variations according to the present disclosure will be within the scope of the claims.
Claims (9)
1. Remote nuclear capacity monitoring system of battery based on thing networking, its characterized in that:
the system comprises a storage battery parameter sensor, a current measuring unit, a storage battery on-line monitoring device, a storage battery effectiveness monitor, an Internet of things access node device and a comprehensive monitoring platform, and is used for measuring single battery voltage, post temperature, single internal resistance, group voltage, charge-discharge current and passive equalization, calculating the residual capacity SOC of the storage battery and uploading acquired storage battery parameters through a communication interface, so that real-time monitoring of the running state of the storage battery and one-key charge-discharge control are realized.
2. The remote nuclear capacity monitoring system of a storage battery based on the internet of things of claim 1, wherein: the storage battery parameter sensor collects terminal voltage, internal resistance and temperature of each storage battery; the current monitoring device collects the current of the whole group of storage batteries; and uploading the data to an online storage battery monitoring device by using a serial port protocol in a wired mode.
3. The remote nuclear capacity monitoring system of a storage battery based on the internet of things of claim 2, wherein: the storage battery on-line monitoring device uses a modbus protocol to communicate with the RS485 interface converter.
4. The remote nuclear capacity monitoring system of a storage battery based on the internet of things of claim 1, wherein: the storage battery effectiveness monitor is used for realizing the load discharge of the storage battery, receiving a discharge instruction issued by the access node equipment of the Internet of things, and collecting the resistance of a discharge loop and the voltage drop in the discharge process.
5. The remote nuclear capacity monitoring system of a storage battery based on the internet of things according to claim 4, wherein: in the storage battery effectiveness monitor, a switch K1 is in a normally closed state, and the storage battery pack is subjected to floating charge through a charger; when the effectiveness of the battery pack is required to be detected, K1 is opened, the charger is disconnected from the storage battery due to the action of the unidirectional-conduction step-down silicon chain Q1, meanwhile, the resistor Q2 generates impact current, a loop is formed with the storage battery and the direct-current bus, equipment and connection lines in the whole loop are detected, at the moment, direct-current load is directly supplied by the storage battery, the whole storage battery pack is discharged, and the discharge is stopped manually or automatically in a set discharge time.
6. The remote nuclear capacity monitoring system of a storage battery based on the internet of things of claim 1, wherein: the battery effectiveness monitor communicates with the RS485 interface converter using a battery effectiveness specified time discharge communication protocol.
7. The remote nuclear capacity monitoring system of a storage battery based on the internet of things according to claim 3 or 6, wherein: the RS485 interface converter uses tcp protocol to communicate with the access node equipment of the Internet of things.
8. The remote nuclear capacity monitoring system of a storage battery based on the internet of things of claim 1, wherein: and the access node equipment of the Internet of things uses an mqtt protocol to upload the data of the storage battery on-line monitoring device and the storage battery effectiveness monitor to the comprehensive monitoring platform.
9. The remote nuclear capacity monitoring system of a storage battery based on the internet of things of claim 8, wherein: the comprehensive monitoring platform is connected with the node equipment through the Internet of things, and remotely controls the storage battery effectiveness monitor to realize the monitoring of the whole storage battery pack and the remote on-load nuclear capacity discharging; the storage battery monitoring device uploads parameters of voltage and current of a storage battery pack, voltage, internal resistance and temperature of a single battery terminal in real time or at fixed time through the access node equipment of the Internet of things.
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