A power sensing device and an electric collection device file matching method

Abstract

The present invention relates to a power sensing device and an electric collection device file matching method. A power sensing device comprises: a controller, a downstream multi-channel communicator, a multi-channel strong current sensor, and an upstream communicator; the strong current sensor comprises a sensing interface, an overvoltage protection unit, a current limiting drive unit, a reverse protection unit, and an isolator connected in sequence; the isolator is connected to the controller; the sensing interface is connected to the incoming power supply of the electric collection device; the controller stores the corresponding relationship data between the multiple communication units and the multiple strong current sensors, and is connected to the host computer through the upstream communicator. This device automatically obtains the archive data of the electric collection device through the communication connection with the electric collection device, and automatically matches the archive data of the electric collection device with the incoming power supply of the electric collection device according to the corresponding relationship between the multiple communication units and the multiple strong current sensors on the power sensing device, without manual intervention.

Description

Technical Field

[0001] The present invention relates to the field of power distribution network operation and maintenance, and in particular to a power supply sensing device and an electric power collection device file matching method. Background Art

[0002] In 2017, in order to fully tap the value of smart energy meter data assets, give full play to its supporting role in the operation and maintenance management of distribution networks, and effectively improve the operation and maintenance management and quality service level of distribution networks, State Grid Corporation of China formulated a working method for smart energy meters to support the operation and maintenance management of distribution networks, and issued the "Notice of the State Grid Corporation of China on Issuing the Working Plan for Smart Energy Meters to Support the Operation and Maintenance Management of Distribution Networks (No. 624, 2017)". One of the key application work contents is the reporting of power outages and restorations of typical low-voltage users, with the aim of realizing the real-time active transmission of power outage and restoration event information of low-voltage household meters (referring to energy meters) to the collection terminal, and reporting it to the main station of the power consumption information collection system through wireless or wired means through the collection terminal. After analysis and judgment by the main station of the power consumption information collection system, the power outage and restoration event information is integrated and shared in real time with the power supply service command system through the unified interface service platform, and combined with the low-voltage topological relationship, the user range can be quickly located (strive to be within 5 minutes) after power outage, supporting the rapid repair of low-voltage faults and the reliability analysis of low-voltage power supply.

[0003] According to the different uplink communication methods of low-voltage user electricity meters, existing electricity meters can be mainly divided into carrier electricity meters and RS485 electricity meters. The electricity meter with uplink communication in carrier mode is called carrier electricity meter, and the electricity meter with uplink communication in RS485 bus mode is called 485 electricity meter.

[0004] The carrier electric energy meter reports the power outage and power restoration information of the electric energy meter through the carrier or wireless module with farad capacitance in the electric energy meter itself.

[0005] There are currently two main ways to monitor the power outage and power-on status of RS485 electricity meters. One is the RS485 rotation training method, that is, the acquisition terminal reads the electricity meter data through rotation training to determine whether the electricity meter has been powered on; the other method is to install a power sensing device to directly detect the power supply voltage of the meter box to determine whether the electricity meter has been powered on.

[0006] The method of rotating the data of RS485 electric energy meters by the collection terminals depends on the success rate of meter reading by the collection terminals. However, the success rate of RS485 electric energy meters generally cannot reach 100%. Therefore, this method is not reliable, and there are problems of misjudgment and missed judgment when the user's power outage and power restoration occur.

[0007] The power sensing device is installed to directly detect the power supply voltage of the meter box. The one-to-one correspondence between the power outage and power restoration events of the existing market products and the user's power meter files is completed through manual wiring and manual setting of user power meter files. Since manual wiring and file setting are required, this method is inefficient, cumbersome to operate, increases the workload of equipment operation and maintenance personnel, and is prone to errors. On the other hand, if the customer adds or deletes a user's power meter, the power sensing device needs to re-set the matching file, which has poor compatibility and cannot meet the needs of smart grid automation.

[0008] Patent document No. ZL200810205084.7 discloses a power-aware management system and method thereof, including: a program encapsulation unit, which is used to run an application and detect the electronic devices used by it, and close the application and detect the electronic devices not used by it, and transmit the result information of the detected devices to the control unit; a control unit, which detects the need to turn on or off the power supply of the electronic device according to the above result information, and transmits the detected power supply information to the embedded controller; an embedded controller, which is used to control the power supply of the electronic devices used when the above running application is turned on, and control the power supply of the electronic devices not used when the above closed application is turned off. The present invention solves the problem of determining which devices need power supply according to the running application when the system is running, and supplying power to them, and providing a power-off function for devices that do not provide power management to save more power. It can automatically detect the power supply status of electronic devices, but does not provide a technical solution for entering the file parameters of electronic devices.

[0009] Therefore, there are deficiencies in the existing electronic perception field, which need to be improved and enhanced. Summary of the invention

[0010] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a power sensing device and an electric collection device file matching method, which can automatically receive the file parameters of the connected electric collection device and automatically match the incoming power line of the corresponding electric collection device to improve compatibility.

[0011] In order to achieve the above object, the present invention adopts the following technical solutions:

[0012] A power sensing device, comprising: a controller, a downlink multi-channel communicator, a multi-channel strong current sensor, and an uplink communicator;

[0013] The strong current sensor comprises a sensing interface, an overvoltage protection unit, a current limiting drive unit, a reverse protection unit, and an isolator which are connected in sequence; the isolator is connected to the controller; the sensing interface is connected to the incoming power supply of the power collection device;

[0014] The downlink multi-channel communicator includes a multi-channel communication unit and a switching unit, wherein the multi-channel communication units are respectively connected to the switching unit, and the switching unit is connected to the controller; the communication unit includes a communication interface and a communicator, wherein the communication interface is respectively connected to the communicator and the communication device of the electric collection device, and the communicator is connected to the switching unit; the communication interface is associated with the sensing interface in a one-to-one correspondence; the communication unit is connected to the electric collection device; and the multi-channel communication units are also respectively electrically connected to the controller;

[0015] The controller stores the corresponding relationship data between the multiple communication units and the multiple strong current sensors, and is connected to the host computer through the uplink communicator.

[0016] Preferably, in the power sensing device, the switching unit includes a line selector and a line distributor; the line selector and the line distributor are respectively connected to the controller; the line selector and the line distributor are respectively connected to multiple communication units.

[0017] Preferably, in the power sensing device, the communicator is an RS485 communicator.

[0018] Preferably, in the power sensing device, the number of the communication units is the same as the number of the strong current sensors, both of which are 6-12.

[0019] Preferably, the power sensing device further includes a device power supply, and the device power supply includes a DC power supply and a backup power supply; the DC power supply is a DC-DC power supply; and the backup power supply is a farad capacitor.

[0020] Preferably, the power sensing device further comprises a display unit; the display unit comprises status indicator lights corresponding to the multiple communication units and the multiple high-power sensors respectively.

[0021] A method for matching files of an electric collection device using the power sensing device includes the following steps:

[0022] S1. The power sensing device is powered on, and the controller obtains multiple copies of the power collection device archive data received by the communication unit through the switching unit;

[0023] S2, the controller detects multiple copies of incoming power data of the power collection device through multiple channels of the strong current sensors;

[0024] S3. The controller matches multiple copies of the electric acquisition device file data with multiple copies of the electric acquisition device incoming power supply data according to the corresponding relationship data between the multiple communication units and the multiple strong current sensors to obtain a file and power supply correspondence table, and stores and sends the file and power supply correspondence table to the host computer.

[0025] Preferably, the electrical collection device file matching method further comprises the steps of:

[0026] S4, the controller receives in real time a plurality of copies of the incoming power data of the power collection device detected by a plurality of strong current sensors;

[0027] S5. The controller determines whether there is power outage information or power restoration information in the multiple copies of the power supply data of the power collection device. If so, the controller executes the power collection device file and the corresponding power outage or power restoration information reporting operation; if not, execute step S4.

[0028] Preferably, in the electricity collection device archive matching method, the electricity collection device archive data reporting operation includes:

[0029] The controller matches the file and the power supply correspondence table. If no corresponding power collection device file information is matched, no information is reported and step S4 is executed. If the corresponding power collection device file information is matched, the power collection device file and the corresponding power outage or power restoration information are reported to the host computer and step S4 is executed.

[0030] Preferably, the method for matching files of electrical collection devices, in step S3, further comprises:

[0031] S31, the controller obtains a plurality of copies of the archive data of the power collection device received by the communication unit through the switching unit at a predetermined interval, and compares the archive data of the power collection device in the archive and power source correspondence table;

[0032] S32, the controller determines whether the number of files increases or decreases, if yes, executes step S2; if no, executes step S33;

[0033] S33, the controller determines whether the archive data of multiple power collection devices are completely consistent with the archive data of the power collection devices in the archive and power source correspondence table, if so, execute step S31; if not, execute step S2.

[0034] Compared with the prior art, the present invention provides a power sensing device and an electric collection device file matching method. The device automatically obtains the electric collection device file data through a communication connection with the electric collection device, and automatically matches the electric collection device file data with the incoming power supply of the electric collection device according to the correspondence between the multiple communication units and the multiple strong current sensors on the power sensing device. No human intervention is required, which greatly improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1It is a structural block diagram of the power sensing device provided by the present invention;

[0036] Figure 2 It is a structural block diagram of the downlink multi-channel communicator provided by the present invention;

[0037] Figure 3 It is a mechanism block diagram of the strong current sensor provided by the present invention;

[0038] Figure 4 is a circuit diagram of a controller in Embodiment 2 provided by the present invention;

[0039] Figure 5 It is a circuit diagram of a downlink multi-channel communicator and a strong current sensor in Embodiment 2 provided by the present invention;

[0040] Figure 6 is a circuit diagram of a line selector in Embodiment 2 provided by the present invention;

[0041] Figure 7 It is a circuit diagram of the line distributor in Example 2 provided by the present invention.

[0042] DC-DC (Direct current-Direct current, direct current) DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] Example 1

[0045] Please also read Figure 1-Figure 7 The present invention provides a power sensing device, comprising: a controller 1, a downlink multi-channel communicator 2, a multi-channel strong current sensor 3, and an uplink communicator 4; the controller 1 has a control chip U1, and the selection of the control chip U1 can be based on the usual standards in the field, as long as it can achieve the functions required by the present invention. The control chip U1 can be selected as the R5F51138 processor chip of Renesas Electronics; the downlink multi-channel communicator 2 is a communication device used for the power sensing device to communicate with the power collection device, and the power collection device is an power collection device connected to the power sensing device; the strong current sensor 3 is used to connect to the incoming power supply of the power collection device to sense whether there is power; the power collection device is preferably an electric energy meter, and the electric energy meter is an electric energy meter with a communication function;

[0046] The strong current sensor 3 includes a sensing interface 31, an overvoltage protection unit 32, a current limiting drive unit 33, a reverse protection unit 34, and an isolator 35 connected in sequence; the isolator 35 is connected to the controller 1; the sensing interface 31 is connected to the incoming power supply of the power collection device; specifically, the sensing interface 31 is a commonly used line interface in this field, without specific settings, and the preferred model is a plug-in terminal of HDR1x4; the overvoltage protection unit 32 is preferably a varistor of S14K680E2; the current limiting drive unit 33 is preferably a plurality of large resistance resistors connected in series; the reverse protection unit 34 is preferably a diode; the isolator 35 is preferably an optocoupler of LTV-816S;

[0047] The downlink multi-channel communicator 2 includes a multi-channel communication unit 21 and a switching unit, wherein the multi-channel communication units 21 are respectively connected to the switching unit, and the switching unit is connected to the controller 1; the communication unit 21 includes a communication interface and a communicator, wherein the communication interface is respectively connected to the communicator and the communication device of the electric collection device, and the communicator is connected to the switching unit; the communication interface is associated with the sensing interface 31 in a one-to-one correspondence; the communication unit 21 is connected to the electric collection device; the multi-channel communication units 21 are also respectively electrically connected to the controller 1, for enabling control of the communication units 21 through the controller 1; the communicator is preferably an RS485 communicator; it should be noted that in the known technology in the field, the multi-channel communication units 21 not only need to be electrically connected to the controller 1, but also need to be communicatively connected. The line connection of the present invention is simplified, and the switching unit is used for control, and the situation in which the multi-channel communication units 21 communicate with the controller 1 is improved to the situation in which the multi-channel communication units 21 are respectively connected to the controller 1 through the switching unit to select one of the control units;

[0048] The controller 1 stores the correspondence data between the multiple communication units 21 and the multiple strong current sensors 3, and is connected to the host computer through the uplink communicator 4. The source of the correspondence data is obtained by matching the circuit correspondence between the multiple communication units 21 and the multiple strong current sensors 3, which is a hardware association match and a common technology in this field. It is not specifically limited, and it is good as long as the correspondence matching structure can be realized; the uplink communicator 4 is used for uplink communication, that is, communicating with the host computer, which can be a server or a distribution station switchboard.

[0049] As a preferred solution, in this embodiment, the switching unit includes a line selector 221 and a line distributor 222; the line selector 221 and the line distributor 222 are respectively connected to the controller 1; the line selector 221 and the line distributor 222 are respectively connected to the multiple communication units 21. The line selector 221 is used to select one of the lines for data reception according to the receiving instruction of the controller 1, and has a selector chip D2, the model of the selector chip D2 is preferably TI's model SN74LV4051ADR, which has 8-way analog selection outputs and 3 address control signals; the line distributor 222 is used to select a certain line in the multiple lines for data transmission at the same time according to the sending instruction of the controller 1, and has a distributor chip D7, the model of the distributor chip D7 is preferably TI's model SN74HC138DR, which has a 3-line-8-line decoder, which can distribute a data signal to 8 different channels in a certain order.

[0050] Accordingly, the present invention also provides a method for matching files of an electric collection device using the power sensing device, comprising the steps of:

[0051] S1, the power sensing device is powered on, and the controller 1 obtains multiple copies of the power collection device archive data received by the communication unit 21 through the switching unit;

[0052] S2, the controller 1 detects multiple copies of the incoming power data of the power collection device through multiple channels of the strong current sensor 3;

[0053] S3, the controller 1 matches the multiple copies of the electric acquisition device file data with the multiple copies of the electric acquisition device power data according to the corresponding relationship data between the multiple communication units 21 and the multiple strong current sensors 3, and stores and sends the file and power correspondence table to the host computer. That is, the file and power correspondence table is first stored in the controller 1, and then the controller 1 sends the file and power correspondence table to the host computer through the uplink communicator 4 for backup.

[0054] As a preferred solution, this embodiment further includes the steps of:

[0055] S4, the controller 1 receives multiple copies of the incoming power data of the power collection device detected by the multiple strong current sensors 3 in real time; the real time is executed once at a certain interval, and the certain time is set according to the specific situation, which can be a few milliseconds, a few seconds, or a few minutes, without specific limitation;

[0056] S5, the controller 1 determines whether there is power outage information or power restoration information in the multiple copies of the power supply data of the power collection device. If yes, the control executes the power collection device file data reporting operation; if not, execute step S4. The power outage information means that the controller 1 detects that there is no power in the user's power supply line through the strong power sensor 3; the power restoration information means that after the power outage information appears, the controller 1 detects that there is power in the user's power supply through the strong power sensor 3;

[0057] As a preferred solution, in this embodiment, the operation of reporting the archive data of the electrical collection device includes:

[0058] The controller 1 performs matching in the file and power source correspondence table. If no corresponding power collection device file information is matched, no information is reported and step S4 is executed. If the corresponding power collection device file information is matched, the power collection device file information is reported to the host computer and step S4 is executed.

[0059] Specifically, it is used here to avoid false alarms, that is, when the controller 1 detects the right power-off and power-restore information through the strong current sensor 3, it will query whether there is corresponding power collection device information in the file and power supply correspondence table. If the corresponding power collection device information is found, the power collection device file information will be uploaded to the host computer.

[0060] As a preferred solution, in this embodiment, the electric data collection device file data includes the electric data collection device file communication address, communication protocol and baud rate.

[0061] As a preferred solution, in this embodiment, step S3 further includes:

[0062] S31, the controller 1 obtains the multiple copies of the electric power collection device file data received by the communication unit 21 through the switching unit at a predetermined interval, and compares them with the electric power collection device file data in the file and power source correspondence table;

[0063] S32, the controller 1 determines whether the number of files increases or decreases, if yes, executes step S2; if no, executes step S33;

[0064] S33, the controller 1 determines whether the archive data of multiple power collection devices are completely consistent with the archive data of the power collection devices in the archive and power source correspondence table. If so, execute step S31; if not, execute step S2.

[0065] As a preferred solution, in this embodiment, it also includes a device power supply, and the device power supply includes a DC power supply and a backup power supply; the DC power supply is a DC-DC power supply; and the backup power supply is a farad capacitor battery. Preferably, the device power supply is powered by a 12V DC power supply, and the DC-DC power supply is composed of a 12V to 5V power supply circuit and a 5V to 3.3V power supply circuit, and the DC-DC power supply is used to convert the 12V DC power supply into the 5V and 3.3V power supplies required by the power sensing device; the farad capacitor serves as a backup power supply, and can provide backup power for the power sensing device when the power is lost, and has a charging and discharging unit adapted thereto, and the charging and discharging unit is conventionally used in this field and is not specifically limited.

[0066] As a preferred solution, in this embodiment, the communication unit 21 is an RS485 communication unit. The RS485 communication unit is a common technology used in this field and is not specifically limited. Please refer to Figure 5 , the figure shows the circuit of two RS485 communication units. Correspondingly, the communication device on the electric collection device is also an RS485 communication unit.

[0067] As a preferred solution, in this embodiment, the number of the communication units 21 is the same as that of the strong current sensors 3, both of which are 6-12.

[0068] As a preferred solution, in this embodiment, a maintenance unit and a display unit are also included;

[0069] The maintenance unit is used for parameter setting, parameter query and debugging test of the module itself; the maintenance unit is used for parameter setting and query, program upgrade and debugging test and other maintenance functions of the power sensing device itself.

[0070] The display unit includes status indicators corresponding to the multiple communication units 21 and the multiple strong current sensors 3, and the status indicators are LED lights. The display unit is used to indicate the operation and communication status of the power sensing device according to the instructions of the controller 1, and is mainly composed of a device operation indicator, an uplink communication indicator, indicator lights of multiple communication units 21, and multiple status indicators of the strong current sensors 3.

[0071] As a preferred solution, this embodiment also includes an external interface device, which is connected to the downlink multi-channel communicator 2, the multi-channel high-voltage sensor 3, the uplink communicator 4, and the equipment power supply through different interfaces, and is used to configure adaptive interfaces or standard interfaces for the above-mentioned devices respectively. This is a common technology in the field and is not limited by the present invention.

[0072] Example 2

[0073] Please also read Figure 4-Figure 7, in the figure, >> and << are the input or output direction of the current or electrical signal at this end point, and are connected together with the same number; wherein the control chip U1 is R5F51138, the communication unit 21 is an RS485 communication unit, the selector chip D2 is TI's selector chip D2 with a model number of SN74LV4051ADR, the distributor chip D7 is TI's distributor chip D7 with a model number of SN74HC138DR, the plug-in terminal block with a model number of HDR1x4, the overvoltage protection unit 32 is a varistor with a model number of S14K680E2, the current limiting drive unit 33 is a plurality of large resistance resistors connected in series (resistance values ​​are 100KΩ respectively), and the reverse protection unit 34 is a diode; the isolator 35 is described in detail by taking an optocoupler with a model number of LTV-816S as an example, where the downlink multi-channel communicator 2 has two communication units 21, and the strong current sensor 3 is two.

[0074] The sensing interface 31 and the communication interface are paired one by one with each other through the plug-in terminal block, for example, they can be paired with odd-numbered ports of the plug-in terminal block, and paired with even-numbered ports. Ports that do not have the same number for wiring in the selector chip D2 and the distributor chip D7 are spare ports, such as ports RXD_4853-RXD_4858 on the selector chip D2.

[0075] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the claims attached to the present invention.

Claims

1. A power sensing device, characterized in that: include: Controller, downlink multi-channel communicator, multi-channel strong current sensor, uplink communicator and equipment power supply; The strong current sensor comprises a sensing interface, an overvoltage protection unit, a current limiting drive unit, a reverse protection unit, and an isolator which are connected in sequence; the isolator is connected to the controller; the sensing interface is connected to the incoming power supply of the power collection device; The downlink multi-channel communicator includes a multi-channel communication unit and a switching unit, wherein the multi-channel communication units are respectively connected to the switching unit, and the switching unit is connected to the controller; the communication unit includes a communication interface and a communicator, wherein the communication interface is respectively connected to the communicator and the communication device of the electric collection device, and the communicator is connected to the switching unit; the communication interface is associated with the sensing interface in a one-to-one correspondence; the communication unit is connected to the electric collection device; The multiple communication units are also electrically connected to the controller respectively; the switching unit includes a line selector and a line distributor; the line selector and the line distributor are connected to the controller respectively; the line selector and the line distributor are connected to the multiple communication units respectively; The number of the communication units is the same as that of the strong current sensors, both of which are 6-12 channels; The controller stores the corresponding relationship data between the multiple communication units and the multiple strong current sensors, and is connected to the host computer through the uplink communicator; The equipment power supply includes a direct current power supply and a backup power supply; the direct current power supply is a DC-DC power supply; and the backup power supply is a farad capacitor.

2. The power sensing device according to claim 1, characterized in that: The communicator is an RS485 communicator.

3. The power sensing device according to claim 1, characterized in that: It also includes a display unit; the display unit includes status indicator lights corresponding to multiple communication units and multiple high-voltage sensors respectively.

4. A method for matching files of an electric collection device using the power sensing device according to any one of claims 1 to 3, characterized in that: Includes steps: S1. The power sensing device is powered on, and the controller obtains multiple copies of the power collection device archive data received by the communication unit through the switching unit; S2, the controller detects multiple copies of incoming power data of the power collection device through multiple channels of the strong current sensors; S3. The controller matches multiple copies of the electric acquisition device file data with multiple copies of the electric acquisition device incoming power supply data according to the corresponding relationship data between the multiple communication units and the multiple strong current sensors to obtain a file and power supply correspondence table, and stores and sends the file and power supply correspondence table to the host computer.

5. The electrical collection device file matching method according to claim 4, characterized in that: Also includes the steps: S4, the controller receives in real time a plurality of copies of the incoming power data of the power collection device detected by a plurality of strong current sensors; S5. The controller determines whether there is power outage information or power restoration information in the multiple copies of the power supply data of the power collection device. If so, the controller executes the power collection device file and the corresponding power outage or power restoration information reporting operation; if not, executes step S4.

6. The electrical collection device file matching method according to claim 4, characterized in that: The operation of reporting the archive data of the electric collection device includes: The controller matches the file and the power supply correspondence table. If the corresponding power collection device file information is not matched, no information is reported and step S4 is executed; if the corresponding power collection device file information is matched, the power collection device file and the corresponding power outage or power restoration information are reported to the host computer and step S4 is executed.

7. The electrical collection device file matching method according to claim 6, characterized in that: The step S3 further includes: S31, the controller obtains a plurality of copies of the archive data of the power collection device received by the communication unit through the switching unit at a predetermined interval, and compares the archive data of the power collection device in the archive and power source correspondence table; S32, the controller determines whether the number of files increases or decreases, if yes, executes step S2; if no, executes step S33; S33, the controller determines whether the archive data of multiple power collection devices are completely consistent with the archive data of the power collection devices in the archive and power source correspondence table, if so, execute step S31; if not, execute step S2.

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