KR20100069122A - Apparatus for detecting surreptitious use of electricity and abnormal status in watt-hour meter and electric power system adjacent to it, and method thereof - Google Patents

Abstract

PURPOSE: A device and a method for detecting an abnormal situation and a surreptitious use of electricity in a watt-hour meter and a surrounding electric power system equipment and device are provided to monitor the surreptitious use of electricity and an abnormal situation by periodically or aperiodically measuring a change in the properties of a high frequency reflected wave. CONSTITUTION: A high frequency power distributor(212) applies a high frequency generated by a high frequency generator(211) to an electricity signal line for measuring. A receiver(213) eliminates noises from a high frequency reflected wave. A detector(214) generates a signal for reporting a surreptitious use of electricity or an abnormal situation when the properties of the high frequency reflected wave deviate from the range of the standard value. A controller transmits the signal of the detector to a central processing unit(220). The central processing unit transmits a control command to the controller in response to the signal of the detector.

Description

Apparatus for detecting surreptitious use of electricity and abnormal status in watt-hour meter and electric power system adjacent to it, and method

The present invention relates to a device and method for detecting conductivity and abnormality in power meters and peripheral power system equipment and devices, and more particularly, to changes in line impedance when a conductive and abnormality occurs and in a normal state. Periodic or non-periodic measurement of the characteristic change of the reflected high frequency wave to enable monitoring of electric power and abnormal conditions, enabling accurate power consumption measurement, and early detection and removal of risk factors such as fire caused by electricity. The present invention relates to an apparatus and method for detecting a challenge and an abnormal condition in a power meter and a peripheral power system equipment and apparatus.

In general, power transmitted to a power receiver is generated at a power plant, and then, through a substation, through a transmission line (for example, a three-phase power line), power system equipment and apparatus (for example, a MOF (Meetering outfit) on the customer's side). Or other power system devices and equipment) and then supplied to the load on the consumer side. At this time, the equipment and the device to perform the role of supplying the power transmitted through the power line to the load on the consumer side, and the role of transmitting the electrical signal for measuring the amount of electricity to the electricity meter. 1 is a diagram showing the installation state of equipment on a general power supply line, an example of using MOF.

Referring to FIG. 1, in a conductive situation, an artificial manipulation is applied to a metering electrical signal line connecting each of the MOF 110 and the electricity meter 120 or each junction to cause the electricity meter 120 to make an error in calculating the power consumption. By doing so, it refers to the entire act of capturing electricity bills, which causes a lot of damages to the utility company. In addition, the above situation refers to the whole of an anthropogenic phenomenon which affects the calculation of the power amount due to the change of electrical characteristics due to natural disasters, corrosion, wear, etc. at the electrical signal lines for measuring or each junction. In FIG. 1, reference numeral 130 denotes a load as a general electrical appliance used in a home or an office.

SUMMARY OF THE INVENTION The present invention was created to solve the above problems, and by measuring the change of the characteristics of the high frequency reflected wave due to the change of the line impedance at the time of the occurrence of the conductive state and the abnormal state and the steady state periodically or aperiodically, the conductive and abnormal state is measured. Device that detects the challenges and abnormalities in the electricity meter and surrounding power system equipment and devices, which not only enables accurate power consumption measurement by monitoring, but also enables the early detection and elimination of risk factors such as fire due to electricity and The purpose is to provide a method.

In order to achieve the above object, the electricity meter and surrounding power system equipment and apparatus according to the present invention, the apparatus for detecting and abnormalities,

By connecting in parallel to the metering electrical signal line that connects the electricity meter and the surrounding power system equipment and devices at any power consumer side, it measures the characteristic change of the high-frequency reflected wave due to the change of the line impedance in case of the conduction and abnormal situation and the steady state. A device for detecting electricity and abnormalities in electricity meters and peripheral power system equipment and devices for detecting electricity and abnormalities,

A high frequency generator for generating a high frequency to be applied to the electric signal line for measurement in order to measure the characteristic change of the high frequency reflected wave due to the change of the line impedance in the case of the conduction and abnormal situation and the steady state;

A high frequency wave received from the high frequency generator to be applied to the electric signal line for metering, and a high frequency wave reflected from the electric signal line for metering to receive a high frequency from the high frequency generator and transmits it through a path different from the path received. Power divider;

A receiver for receiving a high frequency reflected wave from the high frequency power divider to remove noise and transmit the received noise;

After receiving the high-frequency reflected wave from which the noise is removed, measuring the characteristic change of the reflected wave, and comparing the characteristic reference value with a predetermined steady state, if the characteristic of the reflected wave is within the error range of the characteristic reference value, generating a signal indicating that the state is normal, A detector for generating a signal informing of a challenge or abnormal situation when the characteristic reference value error range is out of range;

A controller which receives a signal generated from the detector and transmits the signal to a higher controller, and receives and executes a control command from a higher controller; And

It is characterized in that it comprises a central processing unit for determining a steady state, a challenge or an abnormal situation based on the signal generated from the detector received through the controller, and transmits a corresponding control command to the controller.

Here, preferably, at least a front end of the high frequency power divider prevents a high voltage metering electric signal transmitted from the MOF to the electricity meter to flow into the high frequency power divider side, and vice versa from the high frequency power divider side. A circuit (for example, a high voltage capacitor) may be further included to allow high frequency to smoothly flow into the metering electrical signal line.

In addition, a crystal oscillator may be used as the high frequency generator.

In addition, a high frequency power coupler / divider may be used as the high frequency power divider.

In addition, the receiver may have a high frequency filter for removing noise from the received high frequency reflected wave.

In addition, the detector may have a characteristic detection circuit for detecting the characteristics of the high frequency reflected wave received via the receiver.

Here, the characteristic detection circuit may have a pin diode for converting the high frequency reflected wave into a direct current, and a high frequency power detector IC for measuring the magnitude of the high frequency.

The control command transmitted from the central processing unit to the controller is a control command for controlling high frequency generation on / off by the high frequency generator, from the electric signal line for metering by the high frequency power divider. The control command may include a control command for controlling reflection high frequency reception On / Off and a control command for channel conversion.

In addition, in order to achieve the above object, the electricity meter and the surrounding power system equipment and apparatus according to the present invention is a method of detecting the abnormality,

A high frequency generator for generating a high frequency, a high frequency power divider for applying the generated high frequency to a metering electrical signal line, and receiving a high frequency reflected from the metering electrical signal line, a receiver for removing noise from the high frequency reflected wave, and a receiver. After measuring the characteristic change of the high-frequency reflected wave, the detector generates a steady state or abnormal condition signal and transmits the generated signal from the detector to the upper control device element by comparing with the preset characteristic reference value of the steady state. And a central processing unit that transmits a corresponding control command based on a signal generated from a detector transmitted through the controller, and a controller that executes a control command from the controller. By measuring the characteristic change of the high frequency reflected wave by A watt-hour meter and the peripheral power system equipment and the power meter and the peripheral equipment and the power system and over the conductive condition detection method in an apparatus according to the challenge and at least situation detection device according to the device for detecting the situation,

a) generating, by the high frequency generator, a high frequency to be applied to the electrical signal line for measurement in order to measure the characteristic change of the high frequency reflected wave due to the change in the line impedance in the case of the conduction and abnormality occurrence and in the normal state;

b) a path through which the high frequency generated from the high frequency generator is received by the high frequency power divider and applied to the metering electrical signal line, and receiving a high frequency reflected from the metering electrical signal line to receive the high frequency from the high frequency generator Passing through a path different from the above;

c) receiving the high frequency reflected wave by the receiver through the high frequency power divider, removing noise, and transmitting the noise;

d) receiving, by the detector, the high frequency reflected wave from which the noise has been removed and measuring a characteristic change of the reflected wave;

e) determining whether a characteristic of the measured high frequency reflected wave is within a preset characteristic reference value error range;

f) generating, by the detector, a signal indicative of a steady state if the measured value is within a reference value error range, and a signal informing of a challenge or abnormal situation if it is outside the reference value error range;

g) receiving by the controller a signal generated from the detector and transmitting it to the central processing unit;

h) receiving a signal generated from the detector by the central processing unit through the controller to determine a steady state, a challenge or an abnormal situation, and transmitting a corresponding control command to the controller; And

i) receiving and executing a control command from the central processing unit by the controller.

Here, in step h), the control command transmitted from the CPU to the controller is a control command for controlling high frequency generation on / off by the high frequency generator, and the metering by the high frequency power divider. Control command for control of reception of reflected high frequency radio signals from the electrical signal lines, channel conversion command related to frequency conversion of high frequency generated by the high frequency generator or data transmission and reception between the controller and the central processing unit. It may include.

According to the present invention as described above, the high frequency is applied to the electrical signal line for metering connecting the wattmeter and the MOF, and the reflected high frequency is received. By measuring change periodically or non-periodically, you can monitor for challenges and anomalies, enable accurate power metering, and detect and eliminate hazards such as fire from electricity early.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a diagram illustrating a configuration of a device for detecting a challenge and an abnormality in a power meter and a peripheral power system equipment and apparatus according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the apparatus for detecting electricity and abnormality in the electricity meter and the surrounding power system equipment and apparatus according to the present invention may include a power meter 230 and the surrounding power system equipment and apparatus (eg, Detects the conduction and abnormality by measuring the characteristic change of the high-frequency reflected wave due to the change of the line impedance when the conduction and abnormality occur and in the normal state by being connected in parallel to the electrical signal line 250 for measuring which connects the MOF 240 The apparatus includes a high frequency generator 211, a high frequency power divider 212, a receiver 213, a detector 214, a controller 215, and a central processing unit 220.

The high frequency generator 211 generates a high frequency to be applied to the electrical signal line 250 for measurement in order to measure the characteristic change of the high frequency reflected wave due to the change of the line impedance in the case of the conduction or abnormality situation and the steady state.

The high frequency power divider 212 receives the high frequency generated from the high frequency generator 211 and applies it to the electrical signal line 250 for metering, and receives the high frequency reflected from the electrical signal line 250 for metering. A high frequency from the high frequency generator 211 is transmitted through a path P2 different from the path P1 received.

The receiver 213 receives the high frequency reflected wave from the high frequency power divider 212 and removes the noise, and transmits the noise.

The detector 214 receives the high frequency reflected wave from which the noise is removed by the receiver 213, measures the characteristic change of the reflected wave, and compares the characteristic reference value with a predetermined steady state, so that the characteristic of the reflected wave is the characteristic reference value error. If it is within the range it generates a signal indicating that the normal state, and if it is outside the characteristic reference value error range generates a signal indicating that the challenge or abnormal situation.

The controller 215 receives the signal generated from the detector 214, transmits the signal to the CPU 220, and receives and executes a control command from the CPU 220.

The CPU 220 determines a steady state, a challenge, or an abnormal situation based on the generated signal from the detector 214 received through the controller 215, and sends a corresponding control command to the controller 215. To send).

Here, preferably, at least a front end of the high frequency power divider 212 is a high voltage metering electrical signal transmitted from the equipment and apparatus (eg MOF 240) to the electricity meter 230 for the high frequency It prevents the inflow to the power divider 212 side, and conversely, the high frequency generated from the high frequency generator 211 from the high frequency power divider 212 side to the metering electric signal line 250 side can be smoothly introduced. A circuit (for example, high voltage capacitor 216, etc.) may be further installed. At this time, a separate circuit (for example, the high voltage capacitor 217) is further added to the front end of the ground of the detection device 200 according to the present invention, which is connected to the ground line 2L on the side of the electric signal line 250 for metering. Can be installed.

In addition, a crystal oscillator may be used as the high frequency generator 211.

In addition, a high frequency power coupler / divider may be used as the high frequency power divider 212. Such high frequency power couplers / dividers are described later.

In addition, the receiver 213 may have a high frequency filter for removing noise from the received high frequency reflected wave.

In addition, the detector 214 may have a characteristic detection circuit for detecting the characteristic of the high frequency reflected wave received via the receiver 213. Here, the characteristic detection circuit may have a pin diode for converting a high frequency reflected wave into a direct current, and a high frequency power detector IC for measuring the magnitude of the high frequency.

In addition, the central processing unit 220 may be configured to be installed inside the electricity meter 230, it is manufactured in one module form from the conduction / abnormal situation detection unit 210 of the detection device 200 of the present invention It may be installed at a far position to be configured to remotely control the conduction / abnormal situation detection unit 210.

In addition, the control command transmitted from the central processing unit 220 to the controller 215 is a control command for high frequency generation on / off control by the high frequency generator 211, the power distributor for the high frequency A control command for controlling the high frequency reception on / off of the reflected high frequency signal from the electric signal line 250 for metering by 212, relating to the frequency conversion of the high frequency generated by the high frequency generator 211 or the And a channel conversion command related to data transmission and reception between the controller 215 and the central processing unit 220.

Meanwhile, in the present embodiment (FIG. 2), the electrical signal line 250 for measurement connects the wattmeter 230 and the MOF 240 via the test terminal block 260, and the two terminals 2S of the test terminal block 260. 2L) shows a form in which the detection device 200 of the present invention is connected in parallel, but the detection device 200 of the present invention is always provided via the test terminal block 260 as described above. Of course, the detection device 200 of the present invention without the test terminal block 260 may be directly connected to the electrical signal line 250 for measurement.

In addition, the detection apparatus 200 of the present invention, as described above, as well as the electrical signal line 250 for metering, as well as the inside and outside of the electricity meter 230, the inside and outside of the MOF 240, as well as the power system that can cause the above-mentioned challenges and abnormal conditions. It can be installed and operated on any equipment or device.

In addition, in the present embodiment (FIG. 2) shows an example for a three-phase four-wire wattmeter, it is obvious that the present invention can also be applied to three-phase three-wire or single-phase wattmeter.

3 is a view for explaining the principle of the high-frequency power coupler / divider employed as a high-frequency power divider of the electricity meter and the surrounding power system equipment and devices according to the present invention.

Referring to FIG. 3, the coupler 300 is a device that samples a signal having a very small ratio (for example, 100: 1, 1000: 1, etc.) in order to check the characteristics of a high frequency signal. It can be operated as a divider and can also be used as a power combiner when changing inputs and outputs since it is a reversible device.

In the case of FIG. 3A, the coupler 300 couples and extracts only a small amount of power (-30dB, -20dB) so small as not to affect the main signal power path. 3 (B) shows the case of 3dB coupling, when -3dB (1/2) of power is coupled from the original signal, the original signal power is reduced in half and -3dB less at the coupled output. Power comes out. As a result, the coupler 300 in this case operates as a divider for allocating input power by 1/2.

Then, FIG. 2 and with respect to the electricity meter and the surrounding power system equipment and apparatus in the electricity meter and the surrounding power system equipment and apparatus of the present invention having the configuration described above with respect to This will be described with reference to FIG. 4.

4 is a flowchart illustrating a process of detecting a challenge and an abnormal situation in a power meter and surrounding power system equipment and apparatus according to the present invention.

Referring to FIG. 4, the characteristics of the high-frequency reflected wave due to the change of the line impedance in the case of the occurrence of the conduction and the abnormal situation and the steady state, according to the method of detecting the electrical conductivity and the abnormal condition in the electricity meter and the surrounding power system equipment and apparatus according to the present invention. In order to measure the change, a high frequency wave is applied by the high frequency generator 211 to be applied to the electric signal line 250 for measurement (see FIG. 2) (step S401). Thereafter, the high frequency generated from the high frequency generator 211 is received by the high frequency power divider 212 and applied to the electrical signal line 250 for metering, and the high frequency reflected from the electrical signal line 250 for metering is applied. It receives and transmits the high frequency from the high frequency generator 211 through a path P2 different from the path P1 received (step S402).

The high frequency reflected wave is received by the receiver 213 through the high frequency power divider 212 to remove noise, and then transmit the noise (step S403). Then, the high frequency reflected wave from which the noise is removed is received by the detector 214, and the characteristic change of the reflected wave is measured (step S404). That is, in the state in which the high frequency generated from the high frequency generator 211 is applied to the electrical signal line 250 for metering, when artificial manipulation is applied to all parts to which the electrical signal for metering is transmitted, The impedance will change slightly. This finely changed impedance changes the characteristics of the high frequency reflected wave, which is measured by the detector 214. Here, the characteristic measurement of the reflected wave due to the impedance change as described above is performed periodically or aperiodically.

In this way, after the measurement is completed, it is determined whether the characteristic value of the measured reflected wave is within a preset characteristic reference value error range (step S405). In this determination, if the measured value is within the characteristic reference value error range, a signal indicating the steady state is generated by the detector 214 (step S406). Then, in the determination in step S405, if the measured value is out of the characteristic reference value error range, a signal is generated by the detector 214 indicating that it is a challenge or abnormal situation (step S407).

Thereafter, the signal generated from the detector 214 is received by the controller 215 and transmitted to the CPU 220 (step S408). Then, the central processing unit 220 receives a signal generated from the detector 214 to determine a steady state, a challenge or an abnormal situation, and transmits a control command corresponding thereto to the controller 215 (step S409). Here, the control command transmitted from the central processing unit 220 to the controller 215 is a control command for high frequency generation on / off control by the high frequency generator 211, the power distributor for the high frequency. A control command for controlling the high frequency reception on / off of the reflected high frequency signal from the electric signal line 250 for metering by 212, relating to the frequency conversion of the high frequency generated by the high frequency generator 211 or the And a channel conversion command related to data transmission and reception between the controller 215 and the central processing unit 220.

When the control command is sent from the central processing unit 220 by the above, the control command is received by the controller 215 and performed (step S410). That is, the controller 215 controls the high frequency generator 211 so that the high frequency generator 211 continues to generate a high frequency or stops generating the high frequency according to a control command from the central processing unit 220. The channel related to data transmission and reception with the CPU 220 is converted.

As described above, the apparatus for detecting a challenge and an abnormality in the electricity meter and the peripheral power system equipment and apparatus according to the present invention, and the method thereof may be used to connect the electricity meter and the peripheral power system equipment and the apparatus (for example, MOF). It is applied to the electric signal line for measurement and receives the reflected high frequency and monitors the conduction and abnormal situation by measuring the characteristic change of the high frequency reflected wave periodically or non-periodically due to the change of the line impedance when the conducting situation and the abnormal situation occur and the steady state. In addition to enabling accurate and accurate power consumption measurement, there is an advantage to enable early detection and removal of risk factors such as fire due to electricity.

As mentioned above, although the present invention has been described in detail with reference to the preferred embodiment, the present invention is not limited thereto, and it will be apparent to those skilled in the art that various changes and applications can be made without departing from the technical spirit of the present invention. Accordingly, the true scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of the same should be construed as being included in the scope of the present invention.

1 is a view showing the installation state of the equipment on the general power supply line, showing an example when using the MOF.

2 is a view showing the configuration of a challenge and abnormality detection device in the electricity meter and the surrounding power system equipment and apparatus according to an embodiment of the present invention.

3 is a view for explaining the principle of a high frequency power coupler / divider employed as a high-frequency power divider of the electricity meter and the surrounding power system equipment and devices according to the present invention.

Figure 4 is a flow chart showing the execution of the challenge and abnormality detection method in the electricity meter and the surrounding power system equipment and apparatus according to the present invention.

<Explanation of symbols for the main parts of the drawings>

110,240 ... MOF (transformer current transformer) 120,230 ...

210.Conducting / abnormal condition detector 211 ... High frequency generator

212 ... High Frequency Power Dividers ... 213 Receivers

214 Detectors 215 Controllers

216,217 High pressure capacitor 220 Central processing unit

250.Measurement signal line 260 ... Test terminal block

Claims (10)

It is connected in parallel to the metering electrical signal line that connects the electricity meter and the surrounding power system equipment and devices of arbitrary power consumers, and measures the characteristic change of the high-frequency reflected wave due to the change of the line impedance in the case of the conduction and abnormal situation and the steady state. A device for detecting electricity and abnormalities in electricity meters and peripheral power system equipment and devices for detecting electricity and abnormalities, A high frequency generator for generating a high frequency to be applied to the electric signal line for measurement in order to measure the characteristic change of the high frequency reflected wave due to the change of the line impedance in the case of the conduction and abnormal situation and the steady state; A high frequency wave received from the high frequency generator to be applied to the electric signal line for metering, and a high frequency wave reflected from the electric signal line for metering to receive a high frequency from the high frequency generator and transmits it through a path different from the path received. Power divider; A receiver for receiving a high frequency reflected wave from the high frequency power divider to remove noise and transmit the received noise; After receiving the high-frequency reflected wave from which the noise is removed, measuring the characteristic change of the reflected wave, and comparing the characteristic reference value with a predetermined steady state, if the characteristic of the reflected wave is within the error range of the characteristic reference value, generating a signal indicating that the state is normal, A detector for generating a signal informing that the device is out of the characteristic reference value error range; A controller which receives a signal generated from the detector and transmits the signal to a higher controller, and receives and executes a control command from a higher controller; And And a central processing unit for determining a steady state, a conduction, or an abnormal state based on the generated signal from the detector received through the controller, and transmitting a control command corresponding to the controller to the controller. Challenge and abnormality detection device in power system equipment and devices. The method of claim 1, At least a front end of the high frequency power divider prevents a high voltage metering electric signal transmitted from the power system equipment and apparatus to the power meter from flowing into the high frequency power divider side, and vice versa from the high frequency power divider side. And a circuit for allowing a high frequency to smoothly flow into the electric signal line side for metering. The method according to claim 1 or 2, And the high frequency generator is a crystal oscillator. The method according to claim 1 or 2, The high-frequency power divider is a high-frequency power coupler / divider (RF Power Coupler / Divider), characterized in that the device for detecting electrical conductivity and abnormal power system equipment and devices. The method according to claim 1 or 2, And the receiver has a high frequency filter for removing noise from the received high frequency reflected waves. The method according to claim 1 or 2, And the detector has a characteristic detection circuit for detecting a characteristic of a high frequency reflected wave transmitted through the receiver. The method of claim 6, The characteristic detection circuit includes a pin diode for converting the high frequency reflected wave into a direct current and a high frequency power detector IC for measuring the magnitude of the high frequency. Challenge and abnormality detection device in system equipment and devices. The method according to claim 1 or 2, The control command transmitted from the central processing unit to the controller is a control command for controlling high frequency generation on / off by the high frequency generator, and a reflected high frequency signal from the electric signal line for measurement by the high frequency power divider. Device for detecting the challenge and abnormal conditions in the electricity meter and the surrounding power system equipment and device, characterized in that it comprises a control command for reception on / off (On / Off) control, a control command for channel conversion. A high frequency generator for generating a high frequency, a high frequency power divider for applying the generated high frequency to a metering electrical signal line and receiving a high frequency reflected from the metering electrical signal line, a receiver for removing noise from the high frequency reflected wave, and passing through the receiver The detector generates a steady state or abnormal condition signal by measuring the characteristic change of the high frequency reflected wave and compares it with a predetermined normal state characteristic reference value, and transmits the generated signal from the detector to the upper control device element and the upper control device element. And a central processing unit that transmits a corresponding control command based on a signal generated from a detector received through the controller, and a controller that performs a control command of the controller. By measuring the characteristic change of the high frequency reflected wave As the conductive and the watt-hour meter and the peripheral equipment and the power system and over the conductive condition detection method in a power meter and the peripheral power system equipment and the equipment according to the challenge and at least situation detection device according to the device for detecting the above circumstances, a) generating, by the high frequency generator, a high frequency to be applied to the electrical signal line for measurement in order to measure the characteristic change of the high frequency reflected wave due to the change in the line impedance in the case of the conduction and abnormality occurrence and in the normal state; b) a path through which the high frequency generated from the high frequency generator is received by the high frequency power divider and applied to the metering electrical signal line, and receiving a high frequency reflected from the metering electrical signal line to receive the high frequency from the high frequency generator Passing through a path different from the above; c) receiving the high frequency reflected wave by the receiver through the high frequency power divider, removing noise, and transmitting the noise; d) receiving, by the detector, the high frequency reflected wave from which the noise has been removed and measuring a characteristic change of the reflected wave; e) determining whether a characteristic of the measured high frequency reflected wave is within a preset characteristic reference value error range; f) generating, by the detector, a signal indicative of a steady state if the measured value is within the characteristic reference value error range, and a signal informing of a challenge or abnormal situation outside the characteristic reference value error range; g) receiving by the controller a signal generated from the detector and transmitting it to the central processing unit; h) receiving a signal generated from the detector by the central processing unit through the controller to determine a steady state, a challenge or an abnormal situation, and transmitting a corresponding control command to the controller; And i) receiving and executing a control command from the central processing unit by the controller, the method comprising: detecting a challenge and an abnormal condition in a power meter and surrounding power system equipment and apparatus. 10. The method of claim 9, The control command transmitted from the central processing unit to the controller in step h) is a control command for high frequency on / off control by the high frequency generator, and the metering electricity by the high frequency power divider. Control instructions for controlling on / off reception of reflected high frequency signals from signal lines, and channel conversion instructions relating to frequency conversion of high frequencies generated by the high frequency generator or related to data transmission and reception between the controller and the central processing unit. Challenge and abnormality detection method in the electricity meter and the surrounding power system equipment and device, characterized in that.

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