CN110676934A - Intelligent power supply management equipment - Google Patents
Intelligent power supply management equipment Download PDFInfo
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- CN110676934A CN110676934A CN201910938514.4A CN201910938514A CN110676934A CN 110676934 A CN110676934 A CN 110676934A CN 201910938514 A CN201910938514 A CN 201910938514A CN 110676934 A CN110676934 A CN 110676934A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
Abstract
The invention discloses an intelligent power supply management device, which comprises: the device comprises a main chip, and a metering module, a display control module, an output driving module and a communication module which are respectively connected with the main chip; the main chip measures the power supply characteristic of the intelligent power supply management equipment through the metering module; displaying the working state of the shunt load through a display control module; the method comprises the steps that an output driving module controls the on and off of a shunt load of the intelligent power supply management equipment, and meanwhile controls the priority of the on and off of the shunt load; the intelligent power supply management device is connected with an upper computer through a communication module or is connected with equipment with the same communication interface, so that the remote control of a shunt load of the intelligent power supply management device, the pre-alarm parameter configuration of a power supply, the parameter configuration of a network and the data reporting are realized; in addition, the main chip is also respectively connected with the power module, the reset circuit, the crystal oscillator, the memory, the alarm and the debugging serial port. By adopting the equipment, the fault can be monitored in real time and the alarm can be given, so that a safe and reliable power supply is provided for the electric equipment.
Description
Technical Field
The invention relates to the field of power management, in particular to intelligent power management equipment.
Background
At present, power supply equipment widely applied to the market generally comprises one-way alternating current input and eight-way alternating current output, and some remote power supply management equipment is provided with a network module and can remotely control connection or disconnection of a power supply. However, in the research process of the present invention, the inventor finds that, in the existing power management device, because the quality of the input and output power is not detected, when the power fails, the output power cannot be automatically cut off, so that the safety and reliability of the existing power management device are low, and the remote communication mode is too single, meanwhile, in the practical application process, in order to ensure the stability of the system, the power sequence of the load device needs to be controlled, the power device widely used in the market can only control the power sequence by manually plugging and unplugging the power line, thereby easily causing manual misoperation, and easily causing impact on the power supply grid at the moment of the main startup and shutdown of the power device.
Disclosure of Invention
The invention provides an intelligent power supply management device, which aims to solve the problem that the safety and reliability of the conventional power supply management device are low because the quality of a total input power supply and a shunt load power supply is not detected and an output power supply cannot be automatically cut off when the power supply fails in the conventional management device, and simultaneously effectively manages the power-on priority of the load device, is suitable for the load device with requirements on the power-on sequence, and increases a remote communication mode.
An embodiment of the present invention provides an intelligent power management device, including: the device comprises a main chip, and a metering module, a display control module, an output driving module and a communication module which are respectively connected with the main chip;
the main chip measures the power supply characteristic of the intelligent power supply management equipment through a metering module; in the present invention, the power supply characteristics include voltage, current, and frequency.
The main chip displays the working state of the shunt load through a display control module, and controls the working mode of the intelligent power supply management equipment, wherein the display control module comprises an indicator light and a control button;
the main chip controls the on and off of a shunt load of the intelligent power management equipment through the output driving module, and simultaneously controls the priority of the on and off of the shunt load;
the main chip is connected with an upper computer through a communication module or is connected with equipment with the same communication interface of the communication module, so that the remote control of the shunt load of the intelligent power management equipment, the pre-alarm parameter configuration of the power supply, the network parameter configuration and the reporting of the working state data of each shunt load are realized; in the invention, the power supply pre-alarm parameters comprise: an over-voltage parameter, an under-voltage parameter, and an over-current parameter.
The main chip is also respectively connected with the power module, the reset circuit, the crystal oscillator, the memory, the alarm and the debugging serial port.
Further, in an implementation manner, in the intelligent power management device, the controlling, by the master chip, the turn-on priority and the turn-off priority of the shunt load includes:
the opening priority is as follows: the first path > the second path > the third path > the fourth path > the fifth path > the sixth path > the seventh path > the eighth path > the ninth path > the tenth path > the eleventh path > the tenth path > the thirteenth path > the fourteenth path > the fifteenth path;
the closing priority is as follows: the sixteenth path > the fifteenth path > the fourteenth path > the thirteenth path > the tenth path > the ninth path > the eighth path > the seventh path > the sixth path > the fifth path > the fourth path > the third path > the first path.
Further, in an implementation manner, in the intelligent power management device, the main chip is an STM32 processing chip. In the invention, the main chip is an integrated circuit chip, and an STM32 processing chip is selected.
Further, in an implementation manner, in the intelligent power management device, the metering module includes a power metering chip and a hall current sensor;
the electric power metering chip is used for measuring the power supply characteristic of the total input alternating current power supply;
the Hall current sensor is used for converting a current signal of a shunt load into a voltage signal which can be received by the main chip, the measurement range of the current signal is 0 to +/-12A, and when the actual current direction is the same as the calibration current direction of the Hall current sensor, the measurement range is [0,12 ]; and when the actual current direction is opposite to the calibrated current direction of the Hall sensor, the measurement range is [ -12,0 ].
Further, in an implementation manner, in the intelligent power management device, the display control module includes an indicator light and a control button;
the indicator light includes first indicator light and second indicator light, wherein, first indicator light is used for showing intelligent power management equipment's mode of operation, intelligent power management equipment's mode of operation includes: the second indicator light is used for displaying the working state of each shunt load, and the working state of each shunt load comprises an opening state and a closing state;
when the working mode of the intelligent power management equipment is a manual control mode, the first indicator light is red; when the working mode of the intelligent power management equipment is a remote control mode, the first indicator light is green;
when the working state of each shunt load is an opening state, the second indicator light of each shunt load is red; when the working state of each shunt load is a closed state, the second indicator light of each shunt load is turned off;
the control buttons comprise a mode selection button and a shunt control button, wherein the mode selection button is used for selecting the working mode of the intelligent power management equipment, the shunt control button is used for controlling the working state of each shunt load, the control button is pressed to indicate that the shunt load is started, and the control button is not pressed to indicate that the shunt load is closed;
if the mode selection button is pressed, the working mode of the intelligent power supply management equipment is a manual control mode, and the communication module is invalid; if the button is not pressed, the working mode of the intelligent power management equipment is a remote control mode, and the communication module is enabled.
Further, in an implementation manner, in the intelligent power management device, the output driving module includes an isolation driving chip and an electromagnetic relay, where the isolation driving chip is configured to provide sixteen isolation driving channels, and an output current of the isolation driving chip may reach 500 mA; the electromagnetic relay is used for controlling the cut-off and recovery of the power output circuit, and the maximum contact load current of the electromagnetic relay can reach 30A.
Further, in one implementation manner, in the intelligent power management device, the communication module includes an ethernet controller and a high-speed CAN transceiver,
the Ethernet controller is used for providing an SPI interface, supporting a full-duplex working mode and realizing the function of a web server by transplanting a lightweight protocol stack;
the high-speed CAN transceiver is used for communicating with external CAN equipment and reporting and receiving data and control instructions of the intelligent power management equipment.
Further, in an implementation manner, in the intelligent power management device, the power module is configured to generate a dc 12V voltage to supply power to the output driver module, generate a dc 3.3V voltage to supply power to the main chip, the memory, the alarm and the ethernet controller, and generate a dc 5V voltage to supply power to the metering module and the high-speed CAN transceiver.
Further, in an implementation manner, in the intelligent power management device, the reset circuit is configured to control the main chip to enter an initial state, restart execution of a system program, and prevent the main chip from being halted;
the crystal oscillator is used for providing a standard time of time sequence control for the main chip and providing a basic clock signal for the system;
the memory is used for storing network configuration parameters, power supply alarm parameters and power supply fault information;
the alarm is used for giving an alarm when the main input power supply or the shunt output power supply fails;
the debugging serial port is used for work log query and system firmware upgrade.
Further, in an implementation manner, in the intelligent power management device, an operating method of the intelligent power management device includes:
step 101, initializing the intelligent power management equipment;
102, selecting a working mode of the current intelligent power management equipment according to the display control module, wherein the working mode comprises a manual control mode and a remote control mode, if the working mode is the manual control mode, executing a step 103, and if the working mode is the remote control mode, executing a step 104;
103, the current working mode of the intelligent power management device is a manual control mode, the main chip controls the corresponding output driving module by scanning the state of the control button of each shunt of the display control module to realize the on-off control of each shunt load, if the intelligent power management device is started in the manual control mode, the main chip automatically detects the state of each shunt control button of the display control module, actively powers on the shunt load, and maintains the power-on state before the shutdown, wherein the power-on sequence is the same as the priority of each shunt;
104, the current working mode of the intelligent power management device is a remote control mode, and remote control is realized through the communication module, wherein the communication module comprises an Ethernet controller and a high-speed CAN transceiver, and is connected with an upper computer or equipment with the same communication interface as the communication module, so that the remote control of the branch load of the intelligent power management device, the pre-alarm parameter configuration of the power supply, the network parameter configuration and the reporting of the working state data of each branch load are realized;
and 105, the main chip provides a clock for the lightweight protocol stack by starting two internal timers, wherein one timer is timed for 10ms, the other timer is timed for 500ms, a sampling period is provided for the metering module, the timing time of 500ms is up, the metering module is used for obtaining the voltage, the current and the frequency of a total input power supply, the current and other power supply characteristics of each shunt load and the like, the power supply characteristics are compared with preset power supply alarm parameters, once the preset power supply alarm parameters are exceeded, the corresponding output driving module is immediately controlled, the output of a corresponding channel is closed, the alarm is given through the alarm, and meanwhile, fault information and an equipment working log are stored in a memory.
In the prior art, the quality of input and output power supplies is not detected, so that the output power supply cannot be automatically cut off when the power supply fails, and the safety and reliability of the conventional power supply management equipment are low. In order to solve the technical problems, the invention detects the voltage, the current and the frequency of a main input alternating current power supply through a metering chip, detects the current of a shunt output power supply through a Hall current sensor, compares a measured value with a preset alarm parameter, alarms through an alarm and automatically closes a corresponding output driving module when the power supply has faults of overvoltage, undervoltage, total overload, shunt overload and the like, thereby cutting off the output, achieving the total overload protection, the overvoltage and undervoltage protection and the shunt load equipment overload protection, sets a priority for the shunt output, thereby ensuring the power-on sequence of load equipment, simultaneously, selects two working modes of manual control and remote control through a control button, manually controls the load output through the shunt control button in the manual control mode, and under the remote control mode, the power failure monitoring system CAN be communicated with external CAN interface equipment through a CAN interface, CAN also access and modify current network parameters and power supply alarm parameters through an Ethernet port, and meanwhile, the parameters are stored in an external memory, so that power failure data are not lost.
The invention CAN carry out unified management and control on remote electric equipment through an IP network, CAN carry out remote operation through a CAN communication interface, and CAN simultaneously control a plurality of equipment in a cascading mode, thereby being convenient for expansion. When the method is applied, the on-off sequence of the dependency relationship among all the electric equipment is set, the impact of the electric equipment on a power supply grid at the switching moment is reduced, and the influence of induced current on the equipment is also avoided. The invention also provides two working modes of manual control and remote control, monitors the total input power supply and the shunt load current, automatically closes the corresponding output driving module when the power consumption is abnormal, thereby cutting off the power supply, informs maintenance personnel through an alarm, simultaneously provides an equipment fault log, improves the maintenance efficiency, and ensures the safety and the reliability of the whole power consumption system.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any inventive exercise.
Fig. 1 is a schematic structural diagram of an intelligent power management device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a work flow of an intelligent power management device according to an embodiment of the present invention.
The system comprises a main chip 1, a metering module 2, an electric power metering chip 21, a Hall current sensor 22, a display control module 3, an indicator light 31, a control button 32, an output driving module 4, an isolation driving chip 41, an electromagnetic relay 42, a communication module 5, an Ethernet controller 51, a high-speed CAN transceiver 52, a power supply module 6, a reset circuit 7, a crystal oscillator 8, a memory 9, an alarm 10 and a debugging serial port 11.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
The invention discloses an intelligent power supply management device, which is used for load devices with requirements on power supply characteristics and power-on sequence, particularly for a front-stage and a rear-stage device systems, the intelligent power supply management device is sequentially opened from a front-stage device to a rear-stage device when being started, and is sequentially closed from the rear-stage device to the front-stage device when being closed, so that the current is prevented from impacting the front-stage device, and meanwhile, the intelligent power supply management device is applied to the devices with specific requirements on power supply characteristics such as undervoltage and overcurrent on a power supply system.
As shown in fig. 1, which is a schematic structural diagram of an intelligent power management device provided in an embodiment of the present invention, an intelligent power management device includes: the device comprises a main chip 1, and a metering module 2, a display control module 3, an output driving module 4 and a communication module 5 which are respectively connected with the main chip 1;
in this embodiment, the main chip 1 may be an STM32 processing chip, the FLASH capacity is 512KB, the core is Cortex-M3, the ARM V7 architecture is adopted, the Thumb-2 instruction set is supported, and the main chip has the characteristics of high performance, low cost and low power consumption.
The main chip 1 measures the power supply characteristic of the intelligent power supply management equipment through the metering module 2; the power supply characteristics include: the voltage, current, frequency of the total input power, and the current of the shunt output.
The main chip 1 displays the working state of the shunt load through the display control module 3, and controls the working mode of the intelligent power management equipment, wherein the display control module 3 comprises an indicator lamp 31 and a control button 32;
the main chip 1 controls the on and off of a shunt load of the intelligent power management equipment through the output driving module 4, and meanwhile, the main chip 1 controls the priority of the on and off of the shunt load;
the main chip 1 is connected with an upper computer through a communication module 5, or is connected with equipment with the same communication interface of the communication module 5, so that remote control of shunt loads of the intelligent power management equipment, power supply pre-alarm parameter configuration, network parameter configuration and reporting of working state data of each shunt load are realized; specifically, in this embodiment, the main chip 1 builds a web server through the ethernet controller 51 of the communication module 5, connects to the upper computer through a network interface, accesses or modifies network parameters and power supply pre-alarm parameter configurations, including overvoltage parameters, undervoltage parameters, and overcurrent parameters, and communicates with an external CAN device through the high-speed CAN transceiver to implement data reporting and remote control.
The main chip 1 is also respectively connected with a power module 6, a reset circuit 7, a crystal oscillator 8, a memory 9, an alarm 10 and a debugging serial port 11.
In this embodiment, the STM32 processing main chip 1 is used as a core, and forms a minimum system with the power module 6, the reset circuit 7 and the crystal oscillator 8, and the minimum system can provide guarantee for the normal operation of the whole power management device. When the intelligent power management device works, the intelligent power management device selects a working mode through a mode selection button of the display control module 3: the control system comprises manual control and remote control, wherein in a manual control mode, the working state of a shunt load is selected through a shunt control button; under the remote control mode, the Ethernet controller 51 or the high-speed CAN transceiver 52 of the communication module 5 is communicated with external equipment to realize data reporting and remote control, current network parameters and power supply pre-alarm parameter configuration CAN be accessed and modified through an Ethernet port, the parameters are stored in the memory 9, and power failure data are not lost; the voltage, the current, the frequency, the shunt output current and other power supply characteristics of a main input power supply are obtained through the metering module 2, the voltage, the current, the frequency, the shunt output current and other power supply characteristics are compared with preset power supply alarm parameters, once the alarm parameters are exceeded, an alarm is given through the alarm 10 immediately, the output is cut off through controlling the output driving module 4, and therefore a safe and reliable power supply is provided for load equipment; meanwhile, work log query and system firmware upgrade can be performed through the debugging serial port 11.
In the intelligent power management device disclosed in the embodiment of the present invention, the main chip 1 controls the turn-on priority and the turn-off priority of the shunt load, and includes:
the opening priority is as follows: the first path > the second path > the third path > the fourth path > the fifth path > the sixth path > the seventh path > the eighth path > the ninth path > the tenth path > the eleventh path > the tenth path > the thirteenth path > the fourteenth path > the fifteenth path;
the closing priority is as follows: the sixteenth path > the fifteenth path > the fourteenth path > the thirteenth path > the tenth path > the ninth path > the eighth path > the seventh path > the sixth path > the fifth path > the fourth path > the third path > the first path.
In the intelligent power management device disclosed in the embodiment of the present invention, the main chip 1 is an STM32 processing chip. In this embodiment, the main chip 1 is an integrated circuit chip, and an STM32 processing chip is selected in the present invention.
In the intelligent power management device disclosed in the embodiment of the present invention, the metering module 2 includes an electric power metering chip 21 and a hall current sensor 22;
the electric power metering chip 21 is used for measuring the power supply characteristic of the total input alternating current power supply;
specifically, in this embodiment, the electric power measurement chip 12 is used for measuring the power supply characteristic of input ac power supply, has a high-speed SPI interface, and transmission rate can reach 3.5Mbps to provide write protection function, specifically, the electric power measurement chip 12 can be a multifunctional measurement chip, can measure the power supply characteristics such as voltage, electric current, frequency of input ac power supply, can provide gain and valid value skew correction, and parameter configuration automatic check function, has internal power supply monitoring function simultaneously. During initialization, a system control register SYSCON is configured, the gains of voltage channels and current channels are set to be 1 time, and in the using process, parameters such as voltage, current, frequency and the like of an alternating current power supply are obtained by reading a voltage effective value register URMS, a frequency register UFREQ, a channel A current effective value register IARMS and a channel B current effective value register IBRMS.
The hall current sensor 22 is used for converting a current signal of a shunt load into a voltage signal which can be received by the main chip 1, and the measurement range of the current signal is 0 to +/-12A.
Specifically, in this embodiment, the hall current sensor 13 is configured to convert a current signal into a voltage signal that can be received by the main chip 1, and a current measurement range is 0 to ± 12A, and when an actual current direction is the same as a hall sensor calibration current direction, the measurement range is [0,12 ]; and when the actual current direction is opposite to the calibrated current direction of the Hall sensor, the measurement range is [ -12,0 ]. Specifically, the hall current sensor 13 may be a closed-loop hall sensor, and has the characteristics of high precision, low power consumption, strong current overload capability, good linearity, and the like.
In the intelligent power management device disclosed in the embodiment of the present invention, the display control module 3 includes an indicator lamp 31 and a control button 32;
the indicator lamp 31 includes a first indicator lamp and a second indicator lamp, where the first indicator lamp is used to display an operating mode of the intelligent power management device, and the operating mode of the intelligent power management device includes: the second indicator light is used for displaying the working state of each shunt load, and the working state of each shunt load comprises an opening state and a closing state;
when the working mode of the intelligent power management equipment is a manual control mode, the first indicator light is red; when the working mode of the intelligent power management equipment is a remote control mode, the first indicator light is green;
when the working state of each shunt load is an opening state, the second indicator light of each shunt load is red; when the working state of each shunt load is a closed state, the second indicator light of each shunt load is turned off;
the control buttons 32 comprise a mode selection button and a shunt control button, wherein the mode selection button is used for selecting the working mode of the intelligent power management device, the shunt control button is used for controlling the working state of each shunt load, the control button 32 is pressed to indicate that the shunt load is turned on, and the control button 32 is not pressed to indicate that the shunt load is turned off;
if the mode selection button is pressed, the working mode of the intelligent power management equipment is a manual control mode, and the communication module 5 is invalid; if the button is not pressed, the working mode of the intelligent power management equipment is a remote control mode, and the communication module 5 is enabled.
In the intelligent power management device disclosed in the embodiment of the present invention, the output driver module 4 includes an isolation driver chip 41 and an electromagnetic relay 42, wherein the isolation driver chip 41 is configured to provide sixteen isolation driver channels, and an output current of the isolation driver chip 41 can reach 500 mA; the electromagnetic relay 42 is used for controlling the cut-off and recovery of the power output circuit, and the contact load current of the electromagnetic relay can reach 30A at most.
In the intelligent power management device disclosed in the embodiment of the present invention, the communication module 5 includes an ethernet controller 51 and a high-speed CAN transceiver 52,
the ethernet controller 51 is configured to provide an SPI interface, support a full-duplex operating mode, and implement a web server function by migrating a Light Weight IP (LWIP); specifically, the ethernet controller 51 is connected to the main chip 1 through an SPI interface, and it conforms to all specifications of IEEE802.3, and further provides an internal DMA module to implement fast data throughput and hardware-supported IP checksum calculation, and also provides two dedicated pins for connecting to LEDs for network activity status indication. During initialization, the main chip starts two internal timers, wherein one timer is timed for 10ms to provide a clock for LWIP, the other timer is timed for 500ms to provide a sampling period for a metering module, and meanwhile, the system allocates a memory for the LWIP, adds a network card and initially configures network parameters such as an IP address, a gateway, a subnet mask and the like.
The high-speed CAN transceiver 52 is used for communicating with an external CAN device, and reporting and receiving data and control instructions of the intelligent power management device. Specifically, the high-speed CAN transceiver 52 receives a control instruction for the intelligent power management device and reports the working state data of each shunt load.
In the intelligent power management device disclosed in the embodiment of the present invention, the power module 6 is configured to generate a dc 12V voltage to supply power to the output driver module 4, generate a dc 3.3V voltage to supply power to the main chip 1, the memory 9, the alarm 10, and the ethernet controller 51, and generate a dc 5V voltage to supply power to the metering module 2 and the high-speed CAN transceiver 52.
In the intelligent power management device disclosed in the embodiment of the present invention, the reset circuit 7 is configured to control the main chip 1 to enter an initial state, and restart execution of a system program to prevent the main chip 1 from crashing; the reset circuit 7 according to this embodiment can prevent a dead halt caused by a program run-off of the main chip 1, a trapping in a dead loop, or the like.
The crystal oscillator 8 is used for providing a standard time of time sequence control for the main chip 1 and providing a basic clock signal for a system;
the memory 9 is used for storing network configuration parameters, power supply alarm parameters and power supply fault information; specifically, the memory 9 is connected to the main chip 1 through an IIC interface, and is configured to store configuration parameters, device work logs, and fault information, so as to ensure that data is not lost when power is lost.
The alarm 10 is used for giving an alarm when the main input power supply or the shunt output power supply fails;
the debugging serial port 11 is used for work log query and system firmware upgrade.
Specifically, in the embodiment, the main chip performs code programming, firmware upgrading and fault information query through the debugging serial port; the main chip is connected with an Ethernet controller through an SPI interface, an MAC module and a PHY (physical layer) module are integrated inside the main chip, a lightweight IP protocol LWIP is transplanted, the LWIP reduces occupation of an RAM on the basis of keeping main functions of a TCP protocol, building of a WEB server is realized, a user can log in a Web interface only by inputting an IP address of equipment at a browser end, the interface interacts with the Web server through a public gateway interface cgi and a server end embedding ssi, the main chip realizes opening and closing control of a branch load through a control output driving module, and configuration of parameters such as an over-voltage and under-voltage alarm value, an over-current alarm value and an equipment IP;
the main chip is connected with the electric power metering chip of the metering module through the SPI interface, and the value of a corresponding register of the metering chip is read, so that the parameters of voltage, current, frequency and the like of an input power supply are obtained, full digital gain and offset correction are supported, and meanwhile, a power supply monitoring circuit in the metering chip ensures the reliable work of the chip during power-on and power-off;
the main chip reads an analog signal output by the Hall sensor through an internal 12-bit ADC (analog to digital converter), so that a current parameter of an output power supply is obtained; comparing the detected power supply parameter with a preset power supply alarm value, and immediately closing a corresponding output driving module once the detected power supply parameter exceeds the preset power supply alarm value so as to cut off the power supply output and protect the electric equipment;
the main chip is connected with the memory through the IIC interface and used for storing the working log of the equipment, the power supply alarm value and the fault information and ensuring that data is not lost when power is down;
the main chip is communicated with external CAN equipment through a high-speed CAN transceiver and is used for remotely controlling the opening and closing of the shunt loads and reporting the working state data of each shunt load;
the main chip selects the current working mode through scanning the state of the control button and controls the corresponding output driving module, so as to control the corresponding output, and meanwhile, when the shunt load is started, the corresponding indicator lamp is lightened, if the intelligent power management equipment is started under the manual control mode, the main chip can automatically detect the state of each shunt control button of the display control module, actively electrifys the shunt load, the state before shutdown is kept, and meanwhile, the electrifying sequence is according to the priority of each shunt.
As shown in fig. 2, which is a schematic view of a work flow of an intelligent power management device provided in an embodiment of the present invention, a working method of the intelligent power management device includes:
step 101, initializing the intelligent power management device.
Specifically, in this step, the SPI interface and the control register of the electric power metering chip 12 are initialized, the AD interface connected to the hall current sensor 13 is initialized, the debugging serial port 11 is initialized, the IIC interface connected to the memory 9 is initialized, the IO ports connected to the alarm 10, the display and control module 3, the output drive module 4, and the communication module 5 are initialized, and meanwhile, the LWIP protocol stack is initialized, network parameters such as an IP address, a subnet mask, a gateway, and the like are configured, and two internal timers are initialized, wherein 1 timer lasts for 10ms, a clock is provided for the LWIP, and the other timer lasts for 500ms, a sampling period is provided for the metering module, so that preparation is made for normal operation of the entire system.
102, selecting a working mode of the current intelligent power management equipment according to the display control module 3, wherein the working mode comprises a manual control mode and a remote control mode; in this step, if the control button 32 is pressed, which indicates that the current working mode is manual control, the communication module 5 is closed, that is, the communication module 5 is disabled, and step 103 is executed; conversely, if the control button 32 is flipped up, indicating that the current operation mode is remote control, the communication module 5 is turned on, i.e. the communication module 5 is enabled, and step 104 is executed.
103, the current working mode of the intelligent power management device is a manual control mode, the main chip 1 controls the corresponding output driving module by scanning the state of the control button of each shunt of the display control module 3, so as to realize the on-off control of each shunt load, if the intelligent power management device is started in the manual control mode, the main chip 1 automatically detects the state of each shunt control button of the display control module 3, actively powers on the shunt load, and maintains the power-on state before the shutdown, wherein the power-on sequence is the same as the priority of each shunt.
And step 104, when the current working mode of the intelligent power management device is a remote control mode, implementing remote control through the communication module 5, where the communication module includes an ethernet controller 51 and a high-speed CAN transceiver 52, and is connected with an upper computer or a device with the same communication interface as the communication module 5, so as to implement remote control of the branch load of the intelligent power management device, pre-alarm parameter configuration of the power supply, network parameter configuration, and reporting of working state data of each branch load.
And 105, the main chip 1 starts two internal timers, wherein one timer is timed for 10ms to provide a clock for the lightweight protocol stack, the other timer is timed for 500ms to provide a sampling period for the metering module 2, the metering module 2 waits for the timed time of 500ms to arrive, power characteristics such as the voltage, the current and the frequency of a total input power supply and the current of each shunt load are obtained, the power characteristics are compared with preset power supply alarm parameters, once the preset power supply alarm parameters are exceeded, the corresponding output driving module is immediately controlled, the output of a corresponding channel is closed, the alarm is given through the alarm, and meanwhile, fault information and an equipment working log are stored in the memory 9.
In the prior art, the quality of input and output power supplies is not detected, so that the output power supply cannot be automatically cut off when the power supply fails, and the safety and reliability of the conventional power supply management equipment are low. In order to solve the technical problems, the invention detects the voltage, the current and the frequency of a main input alternating current power supply through a metering chip, detects the current of a shunt output power supply through a Hall current sensor, compares a measured value with a preset alarm parameter, alarms through an alarm and automatically closes a corresponding output driving module when the power supply has faults of overvoltage, undervoltage, total overload, shunt overload and the like, thereby cutting off the output, achieving the total overload protection, the overvoltage and undervoltage protection and the shunt load equipment overload protection, sets a priority for the shunt output, thereby ensuring the power-on sequence of load equipment, simultaneously, selects two working modes of manual control and remote control through a control button, manually controls the load output through the shunt control button in the manual control mode, and under the remote control mode, the power failure monitoring system CAN be communicated with external CAN interface equipment through a CAN interface, CAN also access and modify current network parameters and power supply alarm parameters through an Ethernet port, and meanwhile, the parameters are stored in an external memory, so that power failure data are not lost.
The invention CAN carry out unified management and control on remote electric equipment through an IP network, CAN carry out remote operation through a CAN communication interface, and CAN simultaneously control a plurality of equipment in a cascading mode, thereby being convenient for expansion. When the method is applied, the on-off sequence of the dependency relationship among all the electric equipment is set, the impact of the electric equipment on a power supply grid at the switching moment is reduced, and the influence of induced current on the equipment is also avoided. The invention also provides two working modes of manual control and remote control, monitors the total input power supply and the shunt load current, automatically closes the corresponding output driving module when the power consumption is abnormal, thereby cutting off the power supply, informs maintenance personnel through an alarm, simultaneously provides an equipment fault log, improves the maintenance efficiency, and ensures the safety and the reliability of the whole power consumption system.
In specific implementation, the present invention further provides a computer storage medium, where the computer storage medium may store a program, and the program may include some or all of the steps in the embodiments of the intelligent power supply device provided by the present invention when executed. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM) or a Random Access Memory (RAM).
Those skilled in the art will readily appreciate that the techniques of the embodiments of the present invention may be implemented as software plus a required general purpose hardware platform. Based on such understanding, the technical solutions in the embodiments of the present invention may be essentially or partially implemented in the form of a software product, which may be stored in a storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes several instructions for enabling a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method according to the embodiments or some parts of the embodiments.
The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention.
Claims (10)
1. An intelligent power management device, comprising: the device comprises a main chip (1), and a metering module (2), a display control module (3), an output driving module (4) and a communication module (5) which are respectively connected with the main chip (1);
the main chip (1) measures the power supply characteristic of the intelligent power supply management equipment through the metering module (2);
the main chip (1) displays the working state of the shunt load through the display control module (3) and controls the working mode of the intelligent power management equipment, and the display control module (3) comprises an indicator lamp (31) and a control button (32);
the main chip (1) controls the on and off of a shunt load of the intelligent power management equipment through the output driving module (4), and meanwhile, the main chip (1) controls the priority of the on and off of the shunt load;
the main chip (1) is connected with an upper computer through a communication module (5) or is connected with equipment with the same communication interface of the communication module (5), so that the remote control of the shunt load of the intelligent power management equipment, the pre-alarm parameter configuration of the power supply, the network parameter configuration and the reporting of the working state data of each shunt load are realized;
the main chip (1) is also respectively connected with a power module (6), a reset circuit (7), a crystal oscillator (8), a memory (9), an alarm (10) and a debugging serial port (11).
2. The intelligent power management device according to claim 1, wherein the master chip (1) controls the turn-on priority and the turn-off priority of the shunt load, comprising:
the opening priority is as follows: the first path > the second path > the third path > the fourth path > the fifth path > the sixth path > the seventh path > the eighth path > the ninth path > the tenth path > the eleventh path > the tenth path > the thirteenth path > the fourteenth path > the fifteenth path;
the closing priority is as follows: the sixteenth path > the fifteenth path > the fourteenth path > the thirteenth path > the tenth path > the ninth path > the eighth path > the seventh path > the sixth path > the fifth path > the fourth path > the third path > the first path.
3. An intelligent power management device according to claim 1, wherein the main chip (1) is an STM32 processing chip.
4. The intelligent power management device according to claim 1, wherein the metering module (2) comprises a power metering chip (21) and a hall current sensor (22);
the electric power metering chip (21) is used for measuring the power supply characteristic of the total input alternating current power supply;
the Hall current sensor (22) is used for converting a current signal of a shunt load into a voltage signal which can be received by the main chip (1).
5. The intelligent power management device according to claim 1, wherein the display control module (3) comprises an indicator lamp (31) and a control button (32);
the indicator lamp (31) comprises a first indicator lamp and a second indicator lamp, wherein the first indicator lamp is used for displaying the working mode of the intelligent power management device, and the working mode of the intelligent power management device comprises: the second indicator light is used for displaying the working state of each shunt load, and the working state of each shunt load comprises an opening state and a closing state;
when the working mode of the intelligent power management equipment is a manual control mode, the first indicator light is red; when the working mode of the intelligent power management equipment is a remote control mode, the first indicator light is green;
when the working state of each shunt load is an opening state, the second indicator light of each shunt load is red; when the working state of each shunt load is a closed state, the second indicator light of each shunt load is turned off;
the control buttons (32) comprise a mode selection button and a shunt control button, wherein the mode selection button is used for selecting the working mode of the intelligent power management device, the shunt control button is used for controlling the working state of each shunt load, the control button (32) is pressed to turn on the shunt load, and the control button (32) is not pressed to turn off the shunt load;
if the mode selection button is pressed, the working mode of the intelligent power management equipment is a manual control mode, and the communication module (5) is invalid; if the button is not pressed, the working mode of the intelligent power management equipment is a remote control mode, and the communication module (5) is enabled.
6. The intelligent power management device according to claim 1, wherein the output driver module (4) comprises an isolation driver chip (41) and an electromagnetic relay (42), wherein the isolation driver chip (41) is configured to provide sixteen isolation driver channels, and an output current of the isolation driver chip (41) can reach 500 mA; the electromagnetic relay (42) is used for controlling the cut-off and recovery of a power supply output circuit, and the contact load current of the electromagnetic relay can reach 30A at most.
7. The intelligent power management device according to claim 1, wherein the communication module (5) comprises an Ethernet controller (51) and a high-speed CAN transceiver (52),
the Ethernet controller (51) is used for providing an SPI interface, supporting a full-duplex working mode and realizing the function of a web server by transplanting a lightweight protocol stack;
and the high-speed CAN transceiver (52) is used for communicating with external CAN equipment and reporting and receiving data and control instructions of the intelligent power management equipment.
8. The intelligent power management device according to claim 1, wherein the power module (6) is configured to generate a dc 12V voltage to power the output driver module (4), generate a dc 3.3V voltage to power the main chip (1), the memory (9), the alarm (10) and the ethernet controller (51), and generate a dc 5V voltage to power the metering module (2) and the high-speed CAN transceiver (52).
9. The intelligent power management device of claim 1,
the reset circuit (7) is used for controlling the main chip (1) to enter an initial state, restarting to execute a system program and preventing the main chip (1) from being halted;
the crystal oscillator (8) is used for providing a standard time of time sequence control for the main chip (1) and providing a basic clock signal for a system;
the memory (9) is used for storing network configuration parameters, power supply alarm parameters and power supply fault information;
the alarm (10) is used for giving an alarm when the main input power supply or the shunt output power supply fails;
the debugging serial port (11) is used for work log query and system firmware upgrade.
10. The intelligent power management device according to claim 1, wherein the operating method of the intelligent power management device comprises:
step 101, initializing the intelligent power management equipment;
102, selecting a working mode of the current intelligent power management equipment according to the display control module (3), wherein the working mode comprises a manual control mode and a remote control mode, if the working mode is the manual control mode, executing a step 103, and if the working mode is the remote control mode, executing a step 104;
103, the current working mode of the intelligent power management device is a manual control mode, a main chip (1) controls a corresponding output driving module by scanning the state of a control button of each branch of a display control module (3) to realize the on-off control of each branch load, if the intelligent power management device is started in the manual control mode, the main chip (1) automatically detects the state of each branch control button of the display control module (3), actively powers on the branch load, and maintains the power-on state before the shutdown, wherein the power-on sequence is the same as the priority of each branch;
104, when the current working mode of the intelligent power management device is a remote control mode, the remote control is realized through the communication module (5), wherein the communication module comprises an ethernet controller (51) and a high-speed CAN transceiver (52), and is connected with an upper computer or a device with the same communication interface as the communication module (5) to realize the remote control of the branch load of the intelligent power management device, the pre-alarm parameter configuration of the power supply, the network parameter configuration and the data report of the working state of each branch load;
and 105, the main chip (1) starts two internal timers, wherein one timer is timed for 10ms to provide a clock for the lightweight protocol stack, the other timer is timed for 500ms to provide a sampling period for the metering module (2), the timing time of 500ms is waited for, the voltage, the current and the frequency of a total input power supply, the current and other power supply characteristics of each shunt load are obtained through the metering module (2), the power supply characteristics are compared with preset power supply alarm parameters, once the preset power supply alarm parameters are exceeded, the corresponding output driving module is immediately controlled, the output of a corresponding channel is closed, the alarm is given through the alarm, and meanwhile, fault information and an equipment working log are stored in a memory (9).
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