CN104333083A - Online maintenance system of distributed power supply - Google Patents

Abstract

The invention discloses a distributed power supply online maintenance system, which includes a battery unit composed of one or more battery packs, a battery maintenance system, an environmental control unit, and a management and monitoring center. The battery maintenance system includes one or more battery maintenance module, a main control module and a communication module, the main control module is connected to the battery pack through the battery maintenance module, one or more battery maintenance modules are connected to one or more battery packs in one-to-one correspondence, and the discharge terminal of the battery maintenance module is connected to the Load connection, the charging end of the battery maintenance module is connected to the UPS power supply through the AC-DC conversion module, and the main control module is connected to the environmental control unit and the management monitoring center through the communication module. The invention supports the remote management department to perform online maintenance on the battery pack, greatly improves the quality and efficiency of operation and maintenance, and prolongs the service life of the battery pack.

Description

Distributed power supply online maintenance system

technical field

The invention relates to a distributed power supply online maintenance system.

Background technique

With the rapid development of my country's electric power and telecommunications industry in recent years, the number of substations and battery packs is increasing rapidly every year. At the same time, the distance between substations and power supply company management units is getting farther and farther. and the thorny issue of telecommunications systems.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, provide a distributed power supply online maintenance system, realize the charge and discharge control of the battery pack through the charging and discharging circuit, and send the real-time status information of the battery pack to the remote The end management department supports the remote management part to perform online maintenance on the battery pack.

The object of the present invention is achieved through the following technical solutions: a distributed power supply online maintenance system, which includes a battery unit composed of one or more battery packs, a battery maintenance system, an environmental control unit and a management and monitoring center, the battery The maintenance system includes one or more battery maintenance modules, a main control module and a communication module, the main control module is connected to the battery pack through the battery maintenance module, and one or more battery maintenance modules correspond to one or more battery packs Connection, the discharge end of the battery maintenance module is connected to the load, the charging end of the battery maintenance module is connected to the UPS power supply through the AC-DC conversion module, and the main control module is respectively connected to the environmental control unit and the management monitoring center through the communication module.

The battery maintenance module includes a charge control circuit, a discharge control circuit, a state detection module and a control module, and the control module is connected with the main control module.

The power input of the charging control circuit is connected to the power output of the AC-DC conversion module, the control input of the charging control circuit is connected to the charging control output of the control module, and the power output of the charging control circuit is connected to the charging input of the battery pack.

The power input of the discharge control circuit is connected to the output of the battery pack, the control input of the discharge control circuit is connected to the discharge control output of the control module, and the power output of the discharge control circuit is connected to the load.

The detection end of the state detection module is connected to the battery pack, and the output of the state detection module is connected to the detection input of the control module.

The state detection module includes a combination of one or more of a temperature detection module, a voltage detection module and a current detection module.

The management and monitoring center includes a data analysis unit, a database server, a report generation unit and an alarm unit.

The database server receives and saves the field data collected by the battery maintenance system on the battery unit in real time.

The data analysis unit analyzes and counts the data in the database server, and performs data analysis and statistics on the voltage, current, and temperature of the storage battery. The data analyzing unit includes a battery capacity measuring unit, which measures the battery capacity of the battery according to the voltage and current of the battery.

The report generation unit makes the statistical results obtained by the data analysis unit into a data report, and prints the data report through the printer.

The alarm unit judges whether the current storage battery is in a normal state according to the analysis result obtained by the data analysis unit, and if the storage battery is in an abnormal state, the alarm unit issues an alarm and controls the printer to print out an alarm report in linkage with the printer.

The communication module includes one or more combination of wired communication module and wireless communication module.

The wired communication module includes one or more combination of RJ45 network module, RS485 network module and optical fiber communication module.

The wireless communication module includes one or a combination of GSM communication module, GPRS communication module, 3G communication module and WiFi module.

The storage battery maintenance system also includes an alarm module, and the alarm module is connected with the main control module. The alarm module includes one or a combination of display modules, indicator lights and buzzers.

The storage battery maintenance system further includes a storage module connected to the main control module.

The beneficial effects of the present invention are: the storage battery maintenance system of the present invention has multiple power supply maintenance modules, and can complete the detection and control of each storage battery group.

The present invention realizes the charge and discharge control of each storage battery group through the charging and discharging circuit. The present invention can use the wireless detection module to collect information such as the voltage, current, and temperature of the storage battery group, and the collected information can be directly sent to the superior through the wireless detection module management department.

The present invention can also carry out data exchange with the superior management department through the communication module, especially when the communication is carried out through the optical fiber network, the security of transferring data between each other is high, the communication speed is fast, and the data transmission is stable.

The invention supports the remote management department to perform online maintenance on the battery pack, and while meeting the daily operation and maintenance requirements of the battery pack, greatly improves the quality and efficiency of operation and maintenance, and prolongs the service life of the battery pack.

Description of drawings

Fig. 1 is the system block diagram of distributed power supply online maintenance system of the present invention;

Fig. 2 is a functional block diagram of the power supply maintenance module of the present invention;

Fig. 3 is the circuit schematic diagram of the voltage and current detection module of the present invention;

Fig. 4 is a schematic circuit diagram of the charging and discharging module of the present invention.

Detailed ways

The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

As shown in Figure 1, the distributed power online maintenance system includes a battery unit composed of one or more battery packs, a battery maintenance system, an environmental control unit, and a management and monitoring center. The battery maintenance system includes one or more A battery maintenance module, a main control module and a communication module, the main control module is connected to the battery pack through the battery maintenance module, one or more battery maintenance modules are connected to one or more battery packs in one-to-one correspondence, and the discharge of the battery maintenance module The charging end of the battery maintenance module is connected to the UPS power supply through the AC-DC conversion module, and the main control module is respectively connected to the environmental control unit and the management monitoring center through the communication module.

The environmental control unit is used to detect parameters such as temperature and humidity of the environment, and send the detected parameter information to the main control module through the communication module, and the main control module controls the battery maintenance module to control the battery pack according to the environmental parameter information. Perform operations such as charging, discharging, and power supply.

The battery maintenance system is mainly responsible for real-time data collection and transmission of on-site battery packs, and real-time transmission of the collected on-site data to the remote management and monitoring center.

The management and monitoring center is responsible for remote real-time management and analysis of the on-site data collected by the battery maintenance system. Under the running monitoring state, it judges the voltage of each battery, the charging and discharging current of the battery pack, and the temperature. The value of the battery will give an alarm.

The management and monitoring center includes a data analysis unit, a database server, a report generation unit and an alarm unit.

The database server receives and saves the field data collected by the battery maintenance system on the battery unit in real time.

The data analysis unit analyzes and counts the data in the database server, and performs data analysis and statistics on the voltage, current, and temperature of the storage battery. The data analyzing unit includes a battery capacity measuring unit, which measures the battery capacity of the battery according to the voltage and current of the battery.

The report generation unit makes the statistical results obtained by the data analysis unit into a data report, and prints the data report through the printer.

The alarm unit judges whether the current storage battery is in a normal state according to the analysis result obtained by the data analysis unit, and if the storage battery is in an abnormal state, the alarm unit issues an alarm and controls the printer to print out an alarm report in linkage with the printer.

As shown in Figure 2, the battery maintenance module includes a charge control circuit, a discharge control circuit, a state detection module and a control module, and the control module is connected to the main control module. The power input of the charging control circuit is connected to the power output of the AC-DC conversion module, the control input of the charging control circuit is connected to the charging control output of the control module, and the power output of the charging control circuit is connected to the charging input of the battery pack. The power input of the discharge control circuit is connected to the output of the battery pack, the control input of the discharge control circuit is connected to the discharge control output of the control module, and the power output of the discharge control circuit is connected to the load. The detection end of the state detection module is connected to the battery pack, and the output of the state detection module is connected to the detection input of the control module.

The battery maintenance module is connected to the battery pack through a rectangular electrical connector, and the rectangular electrical connector can be TJ20-02ZJH or TJ20-02TKYL.

Both the main control module and the control module can adopt the F2MC-8FX series microcontroller MB95F136 chip of Fujitsu Company.

The state detection module includes a combination of one or more of a temperature detection module, a voltage detection module and a current detection module.

In the present invention, a digital temperature sensor DS18B20 produced by Dallas Company of the United States can be used as a temperature detection module to detect the temperature of the storage battery. The temperature detection module is adhered on the surface of the battery pack with a thermally conductive adhesive to ensure good thermal contact between the ground pin of the temperature sensor and the battery pack.

As shown in Figure 3, Figure 3 is a schematic circuit diagram of the voltage and current detection module. Among them, the voltage detection module includes resistor R1, resistor R2, resistor R3 and operational amplifier U1, one end of resistor R1 is connected to the voltage output of the battery pack, the other end of resistor R1 is connected to the non-inverting input terminal of operational amplifier U1 through resistor R3, and the resistor The other end of R1 is also connected to the inverting input terminal of the operational amplifier U1 through the resistor R2, the inverting input terminal of the operational amplifier U1 is also connected to the ground, the output terminal of the operational amplifier U1 is connected to the voltage detection input of the control module, and the operational amplifier U1 The output terminal of is also connected with the non-inverting input terminal of operational amplifier U1. In the present invention, resistors R1 with a resistance value of 22kΩ, resistors R2 with 2kΩ, and resistors with 100kΩ can be selected, and the operational amplifier U1 can be LM324AD.

The current detection module includes a resistor R4, a resistor R5, a resistor R6 and an operational amplifier U2. One end of the resistor R4 is connected to the current output of the battery pack, that is, connected to the current output of the sampling resistor, and the other end of the resistor R4 is connected to the operational amplifier U2. The inverting input of the operational amplifier U2 is connected to the intersection of the resistor R2 and the operational amplifier U1 through the resistor R5, the output of the operational amplifier U2 is connected to the current detection input of the control module, and the output of the operational amplifier U2 is also connected through The resistor R6 is connected to the inverting input terminal of the operational amplifier U2, the positive pole of the power supply of the operational amplifier U2 is connected to the reference voltage VCC, and the negative pole of the power supply of the operational amplifier U2 is connected to the ground. In the present invention, resistors R4, 10kΩ, and 220kΩ can be selected, and the operational amplifier U2 can be LM324AD.

As shown in FIG. 4 , FIG. 4 is a schematic circuit diagram of a controllable charging and discharging module. The charging and discharging module includes MOS tube Q1, MOS tube Q2, diode D1, diode D2, resistor R7, resistor R8, resistor R9, resistor R10, resistor R11, capacitor C1, capacitor C2, capacitor C3 and capacitor C4, and the drain of MOS tube Q1 The pole is connected to the charging input terminal of the battery pack through the resistor R8, that is, to the positive pole of the battery pack, the source of the MOS transistor Q1 is connected to the negative pole of the battery pack, the gate of the MOS transistor Q1 is connected to the discharge control terminal of the control module, and the MOS tube Q1 is connected to the discharge control terminal of the control module. The drain of the tube Q2 is connected to the negative pole of the battery pack, the source of the MOS tube Q2 is connected to the ground, the gate of the MOS tube Q2 is connected to the charging control terminal of the control module, and the source and drain of the MOS tube Q2 are connected in parallel There is a resistor R11 and a capacitor C4 in series; the anode of the diode D1 is connected to the input terminal of the UPS power supply, the cathode of the diode D1 is connected to the ground through the resistor R7, and the cathode of the diode D2 is connected to the positive electrode of the battery pack through the resistor R9 and the load. For power input connection, a capacitor C1 and a capacitor C2 are connected in parallel at both ends of the resistor R7, and a resistor R10 and a capacitor C3 are connected in parallel between the positive pole and the negative pole of the battery pack.

The control module can include intelligent power module IPM, which is an advanced power switching device with the advantages of GTR (high power transistor) high current density, low saturation voltage and high voltage resistance, and MOSFET (field effect transistor) high Advantages of input impedance, high switching frequency and low drive power. Moreover, IPM integrates logic, control, detection and protection circuits inside, which is convenient to use, not only reduces the size and development time of the power maintenance module, but also greatly enhances the reliability of the power maintenance module. The input of the intelligent power module IPM is connected to the discharge control terminal and the charge control terminal of the control module respectively, the discharge control output of the intelligent power module IPM is connected to the gate of the MOS transistor Q1, and the charge control output of the intelligent power module IPM is connected to the gate of the MOS transistor Q2. Gate connection.

When the control module sends a charging signal, the gate of the MOS transistor Q2 receives the charging signal, the source and drain of the MOS transistor Q2 are turned on, and the battery pack starts to charge. When the control module sends out a discharge signal, the gate of the MOS transistor Q1 receives the discharge signal, the source and drain of the MOS transistor Q1 are turned on, and the battery pack starts to discharge through the resistor R8. When the control module sends a power supply signal for the load, the gates of the MOS transistors Q1 and Q2 both receive the power supply signal, the source and drain of the MOS transistors Q1 and Q2 are both turned on, and the battery pack starts to supply power to the load.

The battery is generally composed of positive plate group, negative plate group, electrolyte and container. When the lead-acid battery is charged, the lead sulfate on the plate turns into spongy lead and lead oxide respectively, and the sulfate ions fixed in it are released into the electrolyte, and the concentration of sulfuric acid in the electrolyte keeps increasing; otherwise, the oxidation in the anode during discharge The lead and spongy lead on the cathode plate react with sulfuric acid in the electrolyte to become lead sulfate, while the concentration of sulfuric acid in the electrolyte decreases continuously. When the lead-acid battery is insufficiently charged, the lead sulfate on the negative and positive plates cannot be completely converted into spongy lead and lead oxide. If the charge is insufficient for a long time, it will cause lead sulfate to crystallize, vulcanize the plates, and deteriorate the battery quality; otherwise, if When the battery is overcharged, the amount of oxygen produced by the anode is greater than the adsorption capacity of the cathode, which increases the internal pressure of the battery, causes gas to escape, reduces the electrolyte, and may also cause the active material to soften or fall off, and the battery life is greatly shortened.

The power supply maintenance module of the present invention can solve this problem very well. The maintenance pulse signal is sent by the control module. The maintenance pulse signal is a periodic signal, and each cycle includes a charge control signal, a stop signal and a discharge control signal, so that The battery pack is charged and discharged according to the law of "charge-stop-discharge-charge-stop-discharge", and the two ends of the battery are discharged instantaneously to remove the accumulated charges on the positive and negative electrodes, thereby removing lead sulfate crystals and increasing the electrolyte. The effective active substances in the battery can improve the charging capacity of the battery.

The communication module includes one or more combination of wired communication module and wireless communication module.

The wired communication module includes one or more combination of RJ45 network module, RS485 network module and optical fiber communication module.

The wireless communication module includes one or a combination of GSM communication module, GPRS communication module, 3G communication module and WiFi module.

The present invention can also directly use the wireless detection module to realize the real-time transmission of the collected data to the superior management department, and the structure is simple.

The storage battery maintenance system also includes an alarm module, which is connected to the main control module; the alarm module includes a combination of one or more of a display module, an indicator light and a buzzer. Among them, the display module can be composed of three LED digital tubes, which respectively display the voltage state, current state and temperature state of the battery pack, and the LED digital tubes can be composed of 74HC595 shift registers. The display module can also be a liquid crystal display. When the alarm module receives the alarm signal, the display module flashes for alarm, the alarm indicator lights up and flickers, and the buzzer sounds for alarm.

The storage battery maintenance system further includes a storage module connected to the main control module. The storage module is used to store the data information collected by the state detection module, which is convenient for the management and control center to query the historical state information of the battery pack, and can also add a USB interface to meet the on-site copying of the information of the battery pack by the management personnel.

Claims (8)

1. Distributed power supply online maintenance system, characterized in that it includes a battery unit composed of one or more battery packs, a battery maintenance system, an environmental control unit and a management monitoring center, and the battery maintenance system includes one or more A battery maintenance module, a main control module and a communication module, the main control module is connected to the battery pack through the battery maintenance module, one or more battery maintenance modules are connected to one or more battery packs in one-to-one correspondence, and the discharge of the battery maintenance module The charging end of the battery maintenance module is connected to the UPS power supply through the AC-DC conversion module, and the main control module is respectively connected to the environmental control unit and the management monitoring center through the communication module. 2. The distributed power supply online maintenance system according to claim 1, characterized in that: the battery maintenance module includes a charge control circuit, a discharge control circuit, a state detection module and a control module, and the control module and the main control module connection; The power input of the charging control circuit is connected to the power output of the AC-DC conversion module, the control input of the charging control circuit is connected to the charging control output of the control module, and the power output of the charging control circuit is connected to the charging input of the battery pack; The power input of the discharge control circuit is connected to the output of the battery pack, the control input of the discharge control circuit is connected to the discharge control output of the control module, and the power output of the discharge control circuit is connected to the load; The detection end of the state detection module is connected to the battery pack, and the output of the state detection module is connected to the detection input of the control module. 3. The distributed power supply online maintenance system according to claim 2, wherein the state detection module includes one or more combinations of a temperature detection module, a voltage detection module and a current detection module. 4. The distributed power supply online maintenance system according to claim 1, characterized in that: the management and monitoring center includes a data analysis unit, a database server, a report generation unit and an alarm unit; The database server receives and saves the on-site data collected by the battery maintenance system for the battery unit in real time; The data analysis unit analyzes and counts the data in the database server, and performs data analysis and statistics on the voltage, current and temperature of the storage battery; the data analysis unit includes a battery capacity measurement unit, and the battery capacity measurement unit is based on the battery capacity Voltage and current, measure the battery capacity of the storage battery; The report generation unit makes the statistical results obtained by the data analysis unit into a data report, and prints the data report through a printer; The alarm unit judges whether the current storage battery is in a normal state according to the analysis result obtained by the data analysis unit, and if the storage battery is in an abnormal state, the alarm unit issues an alarm and controls the printer to print out an alarm report in linkage with the printer. 5. The distributed power supply online maintenance system according to claim 1, wherein the communication module includes one or more combinations of a wired communication module and a wireless communication module. 6. The distributed power supply online maintenance system according to claim 5, wherein the wired communication module includes one or more combinations of RJ45 network module, RS485 network module and optical fiber communication module. 7. The distributed power supply online maintenance system according to claim 5, characterized in that: the wireless communication module includes a combination of one or more of a GSM communication module, a GPRS communication module, a 3G communication module and a WiFi module . 8. The distributed power supply online maintenance system according to claim 1, characterized in that: The battery maintenance system also includes an alarm module connected to the main control module; the alarm module includes a combination of one or more of a display module, an indicator light and a buzzer; The storage battery maintenance system further includes a storage module connected to the main control module.