KR102227990B1 - Self diagnostic electronic watt-hour meter and electronic watt-hour meter management system using the same - Google Patents

Abstract

The present invention provides a self-diagnostic electronic watt-hour meter, which comprises: a controller for calculating power metering data; a communication unit transmitting the power metering data calculated by the controller to a central management server; a power supply unit supplying power to the controller and the communication unit; a protection element coupled to one end of the power supply unit to protect a device from surge inflow; and at least one sensor sensing the protection element to generate state information of the protection element. The communication unit transmits the state information of the protection element to the central management server.

Description

Self-diagnosis type electronic watt-hour meter and electronic watt-hour meter management system using the same{SELF DIAGNOSTIC ELECTRONIC WATT-HOUR METER AND ELECTRONIC WATT-HOUR METER MANAGEMENT SYSTEM USING THE SAME}

The present invention relates to a self-diagnosis type electronic watt-hour meter and a self-diagnosis type electronic watt-hour meter management system using the same, and more particularly, an electronic watt-hour meter through easy measurement of the real-time status of a protection element for protection of a device and a modem input voltage for metering. The present invention relates to a self-diagnosis type electronic watt-hour meter and a self-diagnosis type electronic watt-hour meter management system using the same, which can prevent failure of an electronic watt-hour meter in advance by managing and supervising it.

In general, the watt-hour meter is used as a device to measure the amount of electricity sold, and is classified into a mechanical watt-hour meter and an electronic watt-hour meter (low-pressure independent electronic watt-hour meter, hereinafter referred to as “electronic watt-hour meter”) according to the driving method. For reference, FIG. 1 shows a conventional mechanical power meter (registered patent 10-0608839).

Recently, KEPCO has replaced the mechanical watt-hour meter with an electronic watt-hour meter in preparation for remote meter reading since 2001.In addition, the existing mechanical watt-hour meter has been completely discontinued after 2012 and is scheduled to be purchased only as an electronic watt-hour meter. Is expected to increase significantly.

In this situation, the structure of the general electronic watt-hour meter that is currently spreading has an external terminal block connecting an external power line to the main body and an internal terminal block connecting the power line inside, and a test terminal piece, CT for each phase, PCB board, LED indicator, It is equipped with a structure in which a nameplate, A/D converter, modem, battery, etc. are collectively built into one main box.

In addition, conventional electronic watt-hour meters operate together with protection elements such as fusible resistors and varistors to protect devices against the influence of surge voltages flowing through power lines and communication lines. , In order to determine whether the protection device is operating, the administrator must remove the case (for example, the cover) of the electronic watt hour meter and check the state of the internal board one by one. There was a drawback of being somewhat inefficient.

In addition, in the conventional electronic watt-hour meter, since the device attachment part of the SMPS (Switched-Mode Power Supply) provided inside the device is facing downward, there is a risk of contact with the current line or short circuit between the lines at the same time as the device is removed. There was a problem that it exists.

In addition, the conventional electronic watt hour meter must check whether the appropriate voltage of the input terminal, that is, the voltage of the input terminal is 220V, before installing the instrument detachable AMI modem that receives DC power from the SMPS. There is a disadvantage in that unnecessary cost and manpower are consumed because a voltage check kit or a voltage meter must be mobilized.

Therefore, by managing and supervising the electronic watt-hour meter through the real-time status of the protection device for the protection of the device and the easy measurement of the modem input voltage for metering, an electronic watt-hour meter that can prevent failure of the electronic watt-hour meter in advance, and an electronic type using the same. The need for a watt-hour meter management system is gradually increasing in the art.

Accordingly, the present invention has been conceived to solve the above problems, and an object of the present invention is to manage and supervise the electronic watt-hour meter through easy measurement of the real-time state of the protection device for protection of the device and the input voltage of the modem for metering. It is to provide a self-diagnosis type electronic watt-hour meter that can prevent failure of the watt-hour meter and a self-diagnosis type electronic watt-hour meter management system using the same.

According to a feature of the present invention for achieving the above object, there is provided a self-diagnosis type electronic power meter, comprising: a controller for calculating power metering data; A communication unit for transmitting the power metering data calculated by the controller to a central management server; A power supply unit supplying power to the controller and the communication unit; A protection device coupled to one end of the power supply to protect the device from surge inflow; And at least one sensor that senses the protection device to generate status information of the protection device, and the communication unit transmits the status information of the protection device to the central management server.

In addition, it further includes a voltage measuring device coupled to the input terminal of the power supply to measure the terminal voltage.

In addition, the controller is characterized in that it delivers information on the terminal voltage measured from the voltage measuring device to the central management server.

Further, it further includes an alarm generator for outputting a warning signal when the terminal voltage measured by the voltage measuring device is overvoltage or no voltage.

In addition, the warning signal includes at least one of a warning sound and a warning light.

In addition, at least one partition wall is formed therein to prevent crosstalk between the electric wires.

In addition, the communication unit is implemented as an instrument detachable AMI modem, characterized in that it is formed to be detachable from the device.

In addition, a self-diagnosis type electronic watt-hour meter management system according to another embodiment of the present invention for solving the above technical problem includes: a self-diagnosis type electronic watt-hour meter; And a central management server that determines whether or not the self-diagnosis-type electronic watt-hour meter is abnormal based on information received from the self-diagnosis-type electronic watt-hour meter.

The present invention manages and supervises the electronic watt-hour meter through real-time status of the protection device for protection of the device and the easy measurement of the modem input voltage for metering, thereby preventing a malfunction of the electronic watt-hour meter in advance.

In addition, since the present invention can remotely check the electronic watt hour meter without a manager's on-site dispatch, there is an effect of improving work efficiency and reducing manpower and additional equipment costs.

In addition, the present invention has the effect of preventing secondary safety accidents such as cross-contact between wires and occurrence of arcs by preventing elements that are dropped from the SMPS from contacting the current line.

1 shows an exemplary configuration of a conventional mechanical power meter.
2 is a schematic diagram of a self-diagnostic electronic power meter management system according to an embodiment of the present invention.
3 shows a functional block diagram of a self-diagnosis type electronic watt hour meter 100 according to an embodiment of the present invention.
4 and 5 respectively show circuit diagrams in which a sensor 141 and a voltage measuring element 142 are attached to the circuit of the power supply unit 140 according to an embodiment of the present invention.
6 is a schematic perspective view of a self-diagnosis type electronic watt hour meter 100 in a state in which the cover is removed.

Hereinafter, embodiments according to the present invention will be described with reference to the accompanying drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible, even if they are indicated on different drawings. In addition, in describing an embodiment of the present invention, if it is determined that a detailed description of a related known configuration or function interferes with an understanding of the embodiment of the present invention, the detailed description thereof will be omitted. In addition, embodiments of the present invention will be described below, but the technical idea of the present invention is not limited or limited thereto, and may be modified and variously implemented by those skilled in the art.

Throughout the specification, when a part is said to be "connected" with another part, this includes not only "directly connected" but also "indirectly connected" with another element interposed therebetween. . Throughout the specification, when a certain part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary. In addition, in describing the constituent elements of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are for distinguishing the constituent element from other constituent elements, and the nature, order, or order of the constituent element is not limited by the term.

2 is a schematic diagram of a self-diagnostic electronic power meter management system according to an embodiment of the present invention. As shown in Figure 2, at least one self-diagnosis type electronic watt-hour meter 100 according to an embodiment of the present invention includes information on whether or not there is a failure (for example, information on the state of the protection device, SMPS power input unit Voltage value, etc.) can be generated and transmitted to the central management server 200.

For example, the self-diagnosis type electronic watt-hour meter 100 is a protection element, for example, a fuseable resistor, inside the self-diagnosis type electronic watt-hour meter 100 to protect the device from an external voltage introduced through a power line or a communication line. Fusible resistor) and varistor can be installed and operated, and the administrator can check the operation of the protection element installed inside the self-diagnosis type electronic watt hour meter 100 through the central management server 200, whether it is malfunctioning, etc. By more accurately grasping as, it is possible to prevent a secondary malfunction of the self-diagnosis type electronic power meter 100.

In addition, for example, a power supply of 220V, which is an appropriate voltage, should be provided to a device or circuit mounted inside the self-diagnosis type electronic watt-hour meter 100, and in order to implement this, the voltage for the self-diagnosis type electronic watt-hour meter 100 must be provided. Measurement must be preceded. Therefore, the central management server 200 according to an embodiment of the present invention remotely monitors the real-time voltage value measured from the power supply unit 140 of the self-diagnosis type electronic watt-hour meter 100, so that at least one self-diagnosis type electronic type A more efficient and economical self-diagnosis type electronic watt-hour meter 100 is provided by preventing unnecessary waste of manpower that must be dispatched directly to the site where the watt-hour meter 100 is installed, and at the same time reducing the inconvenience and cost of using equipment that measures voltage. Make it possible to operate.

In addition, when it is detected whether the protection element of the self-diagnosis type electronic watt-hour meter 100 has a failure or an abnormality in the voltage measured from the power supply unit 140, the self-diagnosis type electronic watt-hour meter 100 is By outputting a warning signal including a warning sound or warning light to the outside through the device, or by transmitting a warning signal (for example, a notification message, etc.) to the central management server 200, the corresponding self-diagnosis type electronic power meter ( 100) can be notified whether there is a fault in the protection device or whether the measured voltage is abnormal. A detailed description of the present invention related thereto will be described in more detail below based on the block diagrams, circuit diagrams, and the like shown in FIGS. 3 to 6 below.

3 shows a functional block diagram of a self-diagnosis type electronic watt hour meter 100 according to an embodiment of the present invention.

3, a self-diagnosis type electronic power meter 100 according to an embodiment of the present invention includes a controller 110, a communication unit 120, a storage unit 130, a power supply unit 140, and an alarm generator 150. ), etc.

The controller 110 may generate power metering data by collecting the power usage of the customer. For example, the controller 110 is a processor, a micro-processor, and a micro-controller. And the like, and can collectively control various operations, functions, etc. of the self-diagnosis type electronic watt hour meter 100 according to the present invention.

The communication unit 120 includes power metering data calculated by the controller 110 or information on whether the self-diagnostic electronic watt hour meter 100 has failed, as described below, for example, information on the state of the protection device, and power supply. The voltage value of the input terminal of the power supply unit 140 measured from the measurement element 143 may be transmitted to the central management server 200. Here, the information on whether the self-diagnosis type electronic watt hour meter 100 has failed may include at least one of a message, video, and audio file previously stored by the administrator, and the communication unit 120 is wired and/or It may be a wireless communication unit 120.

In addition, such information may include content such as text, images, and moving images, and the communication unit 120 includes LAN, WCDMA (Wideband Code Division Multiple Access), LTE (Long Term Evolution), and WiBro (Wireless Broadband Internet). , RF (Radio Frequency) communication, wireless LAN (Wireless LAN), Wi-Fi (Wireless Fidelity), NFC (Near Field Communication), Bluetooth, it is possible to communicate with the central management server 200 through infrared communication. However, this is exemplary, and various wired and wireless communication technologies applicable in the art may be used according to an embodiment to which the present invention is applied.

The storage unit 130 includes information on whether or not the power metering data calculated through the controller 110 or the self-diagnosis type electronic watt hour meter 100 that is transmitted to the central management server 200 through the communication unit 120 Various data related to the diagnostic electronic power meter 100 may be stored.

For reference, the storage unit 130 is a hard disk drive (HDD), a read only memory (ROM), a random access memory (RAM), an electrically erasable and programmable read only memory (EEPROM), as known to a person skilled in the art. Various types of storage devices capable of input/output information such as flash memory, CF (Compact Flash) card, SD (Secure Digital) card, SM (Smart Media) card, MMC (Multimedia) card, or memory stick It may be implemented as, and may be provided inside the self-diagnosis type electronic watt hour meter 100, or may be provided in a separate external device.

In addition, according to a further embodiment of the present invention, an additional memory for data backup may be further provided in the storage unit 130 or separately from the storage unit 130, and the controller 110 is a storage unit. By backing up various data related to power metering data stored in 130, information on whether or not the self-diagnosis type electronic power meter 100 has failed, etc., and storing it in the additional memory, it is possible to actively cope with data loss or loss. do.

The power supply unit 140 may supply power to at least one of the controller 110, the communication unit 120, and the storage unit 130. For example, the power supply unit 140 may be implemented in a switched-mode power supply (SMPS) method, and may include a circuit board, a power circuit, and a protection circuit. Here, the power circuit may include a plurality of diodes and capacitors, a converter, and the like, and a protection circuit including a resistor, a relay terminal, and an excitation coil may be connected in series at both ends of the power circuit.

In one embodiment of the present invention, a protection element for preventing burnout and failure of the self-diagnostic electronic watt hour meter 100 from the inflow of a surge may be additionally coupled to one end of the power supply unit 140, and such a protection element is a fuseable resistor ( Fusible Resistor) or varistor.

More specifically, at least one sensor 141 may be installed at the rear end of the protection device to generate status information of the protection device (for example, see FIG. 4), and the sensor 141 is a protection device. It is implemented as a sensor 141 that detects the opening and closing operation of the protection element, a sensor 141 that detects a temperature change of the protection element, and a sensor 141 that detects an overcurrent or overvoltage of the protection element, to be installed at the rear end of the protection element. I can. However, the shape and type of the sensor 141 is not limited thereto, and various types of sensors 141 for generating status information of the protection device may be provided.

That is, the state information of the protection device generated through the sensor 141 is transmitted to the central management server 200 through the controller 110 or the communication unit 120, or is implemented to be stored in the storage unit 130, Can check detailed information about the status information of the protection device, for example, the date the status information of the protection device was recorded and the type of sensor that generated the status information. The electronic watt hour meter 100 can be checked more easily.

In addition, in another embodiment of the present invention, a voltage measuring element 142 for measuring a terminal voltage may be additionally coupled to both ends of the input terminal of the power supply unit 140 (see, for example, FIG. 5 ). , Information about the terminal voltage of the power supply unit 140 measured from the voltage measuring device 142 may be transmitted to the central management server 200 through the controller 110.

In this case, the communication unit 120 may be implemented as an instrument detachable AMI modem, which is a wireless communication method, and a power supply unit for the safety of the manager before the installation of the communication unit 120 for the device of the self-diagnosis type electronic watt hour meter 100 The operation of checking the voltage state of 140 must be preceded, and the controller 110 may determine whether the terminal voltage of the power supply 140 measured from the voltage measuring element 142 is overvoltage or Information on whether or not there is no voltage may be transmitted to the central management server 200.

That is, the manager must go directly to the site by checking whether the voltage of the input terminal of the power supply unit 140 is an appropriate voltage (eg, 220V) through the central management server 200 prior to the installation of the communication unit 120. While avoiding the hassle of doing so, there is an effect of reducing the cost of equipment for a voltage check kit or a voltage meter used at the installation site.

The alarm generator 150 may output a warning signal to the outside of the device when the terminal voltage of the power supply unit 140 measured from the voltage measuring device 142 is overvoltage or no voltage. In this case, the alarm generator 150 is implemented as a device such as a lighting lamp or a speaker to output a warning sound or a warning signal including a warning lamp to the outside, or a warning signal (for example, a notification message) to the central management server 200 , Etc.) in real time, it is possible to inform the manager of whether the terminal voltage of the power supply unit 140 is abnormal.

That is, even if there is no separate equipment, the manager can more easily recognize whether the terminal voltage of the power supply unit 140 is overvoltage, no voltage, or rated voltage through the warning signal output from the alarm generator 150. .

For reference, each element (110, 120, 130, 140, 150, 160) of the self-diagnosis type electronic watt-hour meter 100 shown in FIG. 2 is an example for explaining the operation and function of the self-diagnosis type electronic watt-hour meter 100 It corresponds to a typical element, but is not limited thereto, and additional elements (eg, a detection unit for detecting current and voltage, a conversion unit for converting a signal, a display unit for outputting the operation state of the electronic watt hour meter 100, etc.) It will be clear that more can be implemented.

4 and 5 respectively show circuit diagrams in which a sensor 141 and a voltage measuring element 142 are attached to a circuit of the power supply unit 140 according to an embodiment of the present invention.

First, referring to FIG. 4, a protection element for preventing burnout and failure of the self-diagnostic electronic watt hour meter 100 from the inflow of a surge is additionally coupled to one end of the power supply unit 140 according to an embodiment of the present invention. At least one sensor 141 may be installed at a rear end of the protection device to generate status information of the protection device.

In this case, the sensor 141 is a sensor 141 that detects an open/close operation of the protection element, a sensor 141 that detects a temperature change of the protection element, a sensor 141 that detects an overcurrent or overvoltage of the protection element, and the like. Although it may be implemented, the present invention is not limited thereto, and various types and types of sensors 141 for generating state information of the protection device may be provided.

That is, the state information of the protection device generated through the sensor 141 is transmitted to the central management server 200 through the controller 110 or the communication unit 120, or is implemented to be stored in the storage unit 130, Can check the detailed information about the status information of the protection device, for example, the date the status information of the protection device was recorded and the type of sensor that generated the status information, and based on this information, the manager can use an electronic watt-hour meter ( 100) can be checked more easily.

Next, referring to FIG. 5, in an embodiment of the present invention, a voltage measuring element 142 for measuring a terminal voltage may be additionally coupled to both ends of an input terminal of the power supply unit 140, and such a voltage measurement Information about the terminal voltage of the power supply unit 140 measured from the device 142 may be transmitted to the central management server 200 through the controller 110.

For example, the communication unit 120 may be implemented as an AMI modem, which is a wireless communication method detachable from the self-diagnosis type electronic power meter 100. In this case, for the safety of the manager, the power supply unit ( The operation of checking the voltage state of 140) must be preceded. Therefore, the controller 110 according to an embodiment of the present invention includes a power supply unit 140 measured from the voltage measuring element 142 prior to the installation of the communication unit 120. Information on whether the terminal voltage of) is overvoltage or non-voltage may be transmitted to the central management server 200.

That is, the manager checks in real time whether the voltage of the input terminal of the power supply unit 140 is an appropriate voltage (eg, 220V) through the central management server 200 prior to the installation of the communication unit 120, It is possible to avoid the hassle of going to the site and at the same time reduce the cost of equipment for a voltage check kit or voltage meter used at the installation site.

6 is a schematic perspective view of a self-diagnosis type electronic watt hour meter 100 in a state in which the cover is removed.

6, the self-diagnosis type electronic power meter 100 may be implemented in the form of a rectangular parallelepiped, and circuit elements and modems constituting the controller 110, the communication unit 120, the power supply unit 140, etc. A space for accommodating the back may be provided. For example, the self-diagnosis type electronic watt hour meter 100 may be made of a plastic material including polycarbonate or other insulating material to protect circuits, wires, modems, etc. accommodated therein. In addition, for example, at least one partition wall 160 is separately provided to divide the inner space of the self-diagnosis type electronic watt hour meter 100 into a plurality of spaces, while the partition wall 160 can prevent short circuits of wires, etc. have.

For reference, (a) of FIG. 6 shows the interior of a conventional electronic watt hour meter, and (b) of FIG. 6 shows the interior of the self-diagnosis type electronic watt hour meter 100 provided with at least one partition wall 160. .

Specifically, referring to (b) of FIG. 6, a circuit board constituting the power supply unit 140, an electric wire, a current line, etc. may be fixed and installed inside the self-diagnosis type electronic watt hour meter 100 with the cover removed. Further, a plate-shaped partition wall 160 separating the inner space of the self-diagnosis type electronic watt hour meter 100 may be installed below the power supply unit 140 to be spaced apart from the power supply unit 140 by a predetermined interval.

In this case, the partition wall 160 may serve to separate the internal space of the self-diagnosis type electronic watt hour meter 100 so that the electronic component separated from the circuit board constituting the power supply unit 140 does not contact the electric wire or current line. , For example, there is an effect of preventing safety accidents such as burnout and fire of the self-diagnosis type electronic watt hour meter 100 that may occur due to short circuits between lines caused by dropping of electronic components, and contact between wires.

As described above, the present invention manages the electronic watt-hour meter by monitoring the state of the protection device for protection of the device and the input voltage of the modem for metering in real time, thereby preventing a malfunction of the self-diagnostic electronic watt-hour meter in advance. There is.

In addition, since the present invention can remotely check the self-diagnosis type electronic watt-hour meter without a manager's on-site dispatch, it is possible to increase work efficiency and reduce manpower and additional equipment costs.

In addition, the present invention has the effect of preventing secondary safety accidents such as cross-contact between wires and occurrence of arcs by preventing elements that are dropped from the SMPS from contacting the current line.

Meanwhile, various embodiments described in the present specification may be implemented by hardware, middleware, microcode, software, and/or a combination thereof. For example, various embodiments include one or more application specific semiconductors (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs). ), processors, controllers, microcontrollers, microprocessors, other electronic units designed to perform the functions presented herein, or a combination thereof.

Also, for example, various embodiments may be embodied or encoded on a computer-readable medium containing instructions. Instructions embodied or encoded on a computer-readable medium may cause a programmable processor or other processor to perform a method, eg, when the instructions are executed. The storage medium may be any available medium that can be accessed by a computer. For example, such computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage medium, magnetic disk storage medium or other magnetic storage device, or instructions accessible by the computer with the desired program code or It may include any other medium that can be used to store in the form of data structures.

Such hardware, software, firmware, and the like may be implemented within the same device or within separate devices to support the various operations and functions described herein. Additionally, components, units, modules, components, and the like described as "units" in the present invention may be implemented together or separately as interoperable logic devices. The description of different features for modules, units, etc. is intended to highlight different functional embodiments, and does not necessarily imply that they must be realized by separate hardware or software components. Rather, functionality associated with one or more modules or units may be performed by separate hardware or software components or may be integrated within common or separate hardware or software components.

Although the operations are shown in the figures in a specific order, it should not be understood that these operations are performed in the specific order shown, or in a sequential order, or that all illustrated operations need to be performed to achieve the desired result. . In any environment, multitasking and parallel processing can be advantageous. Moreover, the division of various components in the above-described embodiments should not be understood as requiring such division in all embodiments, and the described components are generally integrated together into a single software product or packaged into multiple software products. It should be understood that you can.

As described above, an optimal embodiment has been disclosed in the drawings and specifications. Although specific terms have been used herein, these are only used for the purpose of describing the present invention, and are not used to limit the meaning or the scope of the present invention described in the claims. Therefore, those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

100: self-diagnosis type electronic watt hour meter 110: controller
120: communication unit 130: storage unit
140: power supply 141: sensor
142: voltage measurement device 150: alarm generator
160: bulkhead 200: central management server

Claims (8)

As a self-diagnosis type electronic watt hour meter,
A controller for calculating power metering data;
A communication unit for transmitting the power metering data calculated by the controller to a central management server;
A power supply unit supplying power to the controller and the communication unit;
A protection device coupled to one end of the power supply to protect the device from surge inflow;
At least one sensor that senses the protection device and generates status information of the protection device; And
And a voltage measuring element coupled to the input terminal of the power supply and measuring a terminal voltage,
The communication unit transmits the status information of the protection device to the central management server,
The controller transfers information on the terminal voltage measured from the voltage measuring device to the central management server prior to installation of the communication unit, a self-diagnosis type electronic power meter. delete delete The method of claim 1,
Self-diagnosis type electronic watt-hour meter further comprising an alarm generator for outputting a warning signal when the terminal voltage measured from the voltage measuring device is overvoltage or no voltage. The method of claim 4,
The warning signal is a self-diagnosis type electronic power meter including at least one of a warning sound and a warning light. The method of claim 1,
A self-diagnosis type electronic watt-hour meter, characterized in that at least one partition wall is formed therein to prevent crosstalk between wires. The method of claim 1,
The communication unit is implemented as an instrument detachable AMI modem, characterized in that the self-diagnosis type electronic power meter, characterized in that formed to be detachable from the device. The self-diagnosis type electronic power meter according to any one of claims 1 and 4 to 7; And
A self-diagnosis type electronic watt-hour meter management system comprising a central management server that determines whether the electronic watt-hour meter is abnormal based on information received from the self-diagnosis type electronic watt-hour meter.

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