KR100974333B1 - Remote checking system for electricity safety - Google Patents

Abstract

In the present invention, disclosed is a remote electric safety check system capable of remotely monitoring and controlling the circuit breaker and switch disconnection check.

The inspection system according to the present invention measures an overvoltage, an overcurrent, a leakage current, an insulation resistance, guides the self-test of the breaker in response to a periodic check request signal received from the outside, and checks the operation state of the breaker according to the self-test. A control unit which manages the detection result as formatted data after detection; A blocker operation connected to an input / output port of the controller to wirelessly transmit measurement information such as insulation resistance and ground resistance based on the measurement of the overvoltage, overcurrent, leakage current, and insulation resistance, or to receive and periodically respond to the periodic inspection request signal. A short range communication unit for controlling transmission of a status signal; And a communication device installed close to the customer in correspondence with the short range communication unit, and configured to transmit and control the measurement information and the operation state signal to the management center.

Therefore, according to the present invention, by remotely monitoring and controlling the earth leakage breaker and the switch breaker inspection, it is possible to provide an effect that can prevent the fire caused by the breaker malfunction in advance, and reduce unnecessary waste of the electric inspector. .

Electrical, Safety, Inspection, Remote, Communication, Periodic Inspection, Shutdown, Switchgear, MCCB, ELCB, MS

Description

REMOTE CHECKING SYSTEM FOR ELECTRICITY SAFETY}

The present invention relates to an electrical safety inspection system, and more particularly, to enable the remote inspection of the earth leakage breaker, switchgear acting as a major factor of fire occurrence, including measuring the insulation resistance, ground resistance, and leakage current of the consumer. A remote electrical safety inspection system.

In general, the electrical safety management of general-purpose electrical equipment for consumers receiving less than 75kW (manufacture and midnight power is less than 100kW) with a voltage of 600V or less is conducted by the Korea Electric Safety Corporation. The electrical safety regular inspections of electrical facilities are carried out every 1, 2 or 3 years.

Moreover, in the general-use consumer, hundreds of thousands of general-use consumers incurred three or more regular check-up visits due to dual income, boy / girl households, and refusal of electrical safety checks. have. Therefore, the possibility of electrical disaster is increasing by not receiving the electrical safety check and eventually ending with the absentee. The cost of personal, national and social damages caused by electric fires for general-use consumers is estimated to be in the range of billions to billions, and the national trust in electrical safety is inevitably deteriorated.

Digital distribution panel and smart distribution panel for large-scale customers to solve the problems of electrical safety management of electrical equipments by customers and to perform efficient electrical safety management by integrating IT technology (part of the national IT research project of electric power) For example, technologies for monitoring consumer safety elements (leakage, insulation resistance, etc.) based on IT and digital technologies have been developed or are being researched.

However, most of the technologies researched or developed so far are electrical safety management technology for private electric equipments.In order to be applied to the end of general consumer where most of the fires are generated, communication and installation environment, cost of installation, management plan, etc. Many constraints exist.

In particular, the remote electric safety inspection technology for the prevention of electrical safety accidents for general customers has been reluctant to pay for the remote electric safety inspection and management technology since most of the users are general people such as general houses and offices. This is rarely done. In addition, if only the remote electric safety monitoring technology is applied to the general-purpose consumer, it will not receive the public's electric safety services such as circuit breaker operation inspection, free replacement (service), and public relations on the use of electric safety during regular inspections.

In the end, 17 million general-use consumers are divided into 1 year, 2 years, and 3 year periods, and regular check-ups are made. However, about 400,000 absentees occur every year. As a result, the possibility of occurrence of electric disasters such as electric fires is increased, and problems related to the system and inspection system that can solve the problems occur, resulting in technical difficulties.

For example, the inspection system for the electrical safety inspection is to have the inspector jurisdiction over a certain area, partition the jurisdiction area by a predetermined unit, and then perform the inspection by a time unit set for each partitioned area. However, the information on the member customer is not provided sufficiently during such a check, and waste of manpower for member customer management occurs. Absence audience management requires inspection visits in accordance with the procedures prescribed by law, and there is a need to efficiently manage the legal process for each absentee.

Prior to conducting inspections, the auditors are informed in advance through administrative agencies, local newsletters, and cable broadcasting. For absentees, the prospective visit dates are provided using the Electrical Safety Inspection Visiting Guidance Form. Unchecked lakes, which are handled by absence, rejection, and total closure, account for more than 5% annually (more than 400,000 houses per year) and change in social conditions such as social participation and leisure activities of single households, married couples, women, and the elderly. The trend is increasing steadily. Consumers who fail to inspect due to absence can be said to have a very high risk of electrical accidents. Especially, the consumer for three-year cycles cannot be inspected for six years due to absence termination. As this becomes even higher, it is necessary to prepare measures for securing the minimum electrical safety for customers who cannot be inspected due to absence.

The present invention has been made to solve such a problem, and an object of the present invention is to monitor the operation of the earth leakage breaker and the switch remotely, in addition to the insulation monitoring of the consumer, that is, the insulation resistance and ground resistance measurement, It is to provide a remote electrical safety inspection system that can prevent the occurrence of fire in advance.

Another object of the present invention is to monitor the insulation resistance of the consumer, that is, to measure the insulation resistance and the ground resistance, and to remotely monitor the earth leakage breaker and the switch operating state to secure the functionality of the remote monitoring system, thereby prompting the realization of ubiquitous. To provide a remote electrical safety check system.

Remote electrical safety inspection system according to an aspect of the present invention for achieving the above object, the circuit breaker including an electronic switch (MS), a circuit breaker (MCCB) and an earth leakage breaker (ELCB) and is connected to the output terminal of the breaker Remote electrical safety inspection system including a CT that performs current detection, a first filter / amplifier circuit and a second filter / amplifier circuit that provide a normalized waveform for the current detected from a current transformer (ZCT) that detects a leakage current. In the present invention, the output signals of the first filter / amplifier circuit and the second filter / amplifier circuit are processed into digitized information to measure overvoltage, overcurrent, leakage current, insulation resistance, and a periodic inspection request signal received from the outside. A control unit guiding self-checking of the blocking unit in response to the detection, detecting an operation state of the blocking unit according to the self-checking, and managing the detection result as formatted data; A blocker operation connected to an input / output port of the controller to wirelessly transmit measurement information such as insulation resistance and ground resistance based on the measurement of the overvoltage, overcurrent, leakage current, and insulation resistance, or to receive and periodically respond to the periodic inspection request signal. A short range communication unit for controlling transmission of a status signal; And a communication device installed close to the customer in correspondence with the short range communication unit and transmitting and controlling the measurement information and the operation state signal of the cutoff unit to a management center.

The present invention provides an effect that can prevent the fire caused by the breaker malfunction in advance by remotely monitoring and controlling the earth leakage breaker and the switch breaker check as a legal item of the electric safety check. In addition, there is an effect that can increase the completeness of the electrical safety inspection system to reduce unnecessary human waste of the electrical inspector.

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

1 is a block diagram showing a remote electrical safety inspection system according to the present invention. As shown, a breaker 117 including an electronic switch (MS), a circuit breaker (MCCB) and an earth leakage breaker (ELCB), and is connected to the output terminal from the breaker 117 to provide the rated power of the system. Normalized waveforms for the current detected from the transformer 119 and the rectifier circuit 121 and the output current of the breaker 117 is connected to the output terminal of the blocking unit 117 to detect the current, the current transformer (ZCT) for detecting the leakage current Digitize the output signal of the first filter / amplifier circuit 105 and the second filter / amplifier circuit 107 and the first filter / amplifier circuit 105 and the second filter / amplifier circuit 107. Process the measured information, and measure the overvoltage, overcurrent, leakage current, insulation resistance, and in response to the periodic inspection request signal received from the outside to guide the self-inspection of the blocking unit 117, After detecting the operation state of 117, the detection result is converted into formatted data. Connected to the control unit 101 and the input / output port of the control unit 101 to wirelessly transmit insulation resistance and ground resistance measurement information based on the measurement of the overvoltage, overcurrent, leakage current, and insulation resistance, or the periodic inspection request signal. Short-range communication unit 111 for receiving and controlling the transmission operation state signal corresponding to the block.

The control unit 101 further displays a display unit 113 which displays textual or graphic information for the blocking unit inspection guide as an output port or provides the user with insulation resistance and ground resistance measurement information according to a remote inspection. It may include. In addition, the control unit 101 further includes a message output unit 115 for providing a voice signal or an alarm signal for requesting the operation test of the blocking unit 117 to the user in response to the periodic inspection request.

On the other hand, the control unit 101 requests the user's self-check, but the self-check of the blocking unit is not made despite the continuous request, and the first filter / amplifier circuit 105 and the second filter / If the insulation resistance and ground resistance values detected from the amplifier circuit 107 exceed a reference value, a trip control unit 109 may be included to forcibly trip the blocking unit 117.

The message output unit 115 may be a beep signal using a piezo or a voice signal for guidance using a speaker. The control unit 101 may store and manage the number of outputs when the warning message is output, and transmit warning time information, number of times information, etc. through the short range communication unit 111.

The short-range communication unit 111 is a commonly used module such as ZigBee, Bluetooth, etc., and correspondingly the remote communication and reception of the data is made by the short-range communication unit installed in the proximity. Remote transmission and reception of data is applied to communication means such as RS232, RS485, Ethernet, and the Internet.

Remote electrical safety check system presented in the present invention may be provided in a structure integrated with any one of the electronic switch (MS), the wiring breaker (MCCB), the earth leakage breaker (ELCB) of the breaker 117, Of course, it can be implemented as a separate device.

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

2 is a flowchart for explaining the main operation of the present invention. As shown, in step S201, the control unit 201 detects a current amount and an image current amount of the output terminal of the blocking unit 117 from the first filter / amplifier circuit 105 and the second filter / amplifier circuit 107. Extract as a digitized signal. This is to measure the insulation resistance, power supply method, frequency injection method, phase difference measurement method, etc. can be used if necessary, and it is used as an applicable methodology for remote monitoring.

The voltage application method is the most commonly used and accurate method of measuring the insulation resistance between two conductors by applying direct DC voltage to the place where the insulation resistance is to be measured and calculating the current flowing. In addition, the earth leakage detection method using an image current transformer is a method of detecting a voltage induced by a current difference of a power line passing through an image current transformer, and converts a magnetic field generated by current into a voltage, and includes an earth leakage breaker and a live leakage current meter. Could be used.

In the frequency injection method, a low voltage of about 10 Hz from a reference voltage generator is applied to a power line through an overlapping transformer, and a current transformer (ZCT) detects and signals the signal to calculate a leakage current based on pure resistance components. In addition to the function of measuring the insulation resistance component, the insulation state of the grid conductors, which cannot be measured by other methods, is measured.

In addition, the phase difference measurement method is a method of measuring the phase difference by measuring the voltage applied from the circuit and the leakage current using the ZCT to detect the ground insulation resistance. That is, accurate and miniaturization is possible by calculating the phase difference based on the current signal measured by the ZCT and the voltage signal detected by the voltage detector, and calculating the leakage current by the vector acceleration / deceleration method.

As described above, the controller 101 measures the insulation resistance for the customer based on the current resistance measurement method, and stores the result value measured in step S203. Although the measurement period can be set arbitrarily, it can be designed to measure by the unit of time, day, month. In addition, the measured result is transmitted through the short range communication unit 111, and before this, it is determined whether or not a periodic inspection for the current customer is performed. That is, when it is determined in step S205 that the regular inspection time for the current customer is not, the measurement result value described above is transmitted in step S221.

This is to be transmitted in a short range according to a predetermined protocol through the short range communication unit 111, and is transmitted to a short range communication device (not shown) in and around a corresponding customer. The short-range communication device is provided to the electrical safety inspection and management center, the communication base for this is the Home Phoneline Networking Alliance (HomePNA) technology using the telephone line, IEEE 1394 technology for high-speed AV multimedia data transmission, and the power line pre-wired in the home Various technologies such as PLC (Power Line Communication) technology may be applied.

In addition, the communication module of the short-range communication unit 111 applied in the present invention is a wireless 1394 and UWB (Ultra Wide Band) to wirelessly solve the bridge function, which is a disadvantage of Bluetooth, HomeRF, Zigbee technology, high-speed wireless LAN technology, wired 1394 Of course, a variety of wireless communication technologies such as the technology can be applied.

Therefore, the control unit 201 continuously transmits and controls the insulation resistance measurement value, and determines whether it is a regular inspection time as in step S205. Here, regular inspection is the inspection cycle according to the statutory electrical safety inspection, general / restaurant restaurant, nightlife tavern, singing practice hall, game provision and PC room, video listening room, physical fitness facility, accommodation, bath spa, youth Training facilities, hotels, medical institutions, social welfare facilities, infant care facilities, kindergartens, industrial, cultural assets, markets, large-scale stores, performance venues, movie theaters, street lights, traffic lights, dangerous goods facilities, examination industry, telephone room / video conversation room, sleeping room Consumers in the industry, collate-ups, etc. have a one-year cycle, and elementary, middle, and high schools have a two-year cycle. Farming, public telephones, repeaters, military units, new free trade, and other facilities are three-year cycles. However, this is based on current legislation, and if remote electrical safety inspections are made, the inspection cycle proposed by the legislation will be different. In view of this, the periodic checks need not be limited to the 1 year, 2 year, 3 year periods presented.

In addition, the above-mentioned regular inspection time is defined by the customer abbreviation in the management agency abbreviation, the electrical safety inspection management center for remote monitoring of electrical safety, and when the defined date arrives to notify the control unit 101 through the short-range communication unit 111. . Therefore, the control unit 201 guides or notifies the user of the blocking unit inspection, as in steps S207 and S209. This may be provided through textual messages and alerts, and may be provided in a voice message or in parallel if necessary.

That is, the controller 201 provides the display unit 113 with a guide letter for checking the blocking unit and transmits a beep or warning sound of a predetermined frequency band through the message output unit 115. This is a message requesting inspection of the electronic switch MS, the wiring breaker MCCB, and the earth leakage breaker ELCB constituting the breaker 117. The message output is performed only for a predetermined period as in step S211, the control unit 101 records and manages the status information on the message output.

On the other hand, when the inspection of the breaker is made before the period set in step S211, that is, the control unit 101 continuously monitors the power switching state of the breaker from the CT connected to the output terminal of the breaker 117, It is determined whether a trip operation has been made. If the result of the check in step S223 is not confirmed that the check of the blocking unit is performed in step S207 to perform a continuous check guide, and if the result of the determination in step S223 recognizes that the check of the block is made from the user, enters to step S225.

This checks the operation state of the control unit 101 to the blocking unit 117, detects the step of re-switching after the tripping the trip unit according to the guidance of the message output unit 115. The controller 101 receives an operation signal of the switching button in order to detect the operation of the switching button provided as the blocking unit. In addition, after detecting the operation of the switching button, the message output unit 115 provides a guide message for inducing reswitching, and determines whether the switching contact of the breaker is normally performed according to the guide message. Of course, the reswitching procedure should be operated within a predetermined time after outputting the corresponding guidance message. If reswitching is not performed within the set time, the inspection procedure of the breaker may be repeated.

If the above-described inspection of the blocking unit is made, in step S227, the control unit 101 transmits the inspection completion and the state according to the inspection of the blocking unit through the short range communication unit 111. The inspection data transmitted to the breaker is transmitted to the electrical safety inspection management center, and the administrator confirms the safety check on the breaker. Thereafter, the controller 101 notifies the completion of the check confirmation through the message output unit 115 in step S229.

On the other hand, as a result of the determination in step S211, if the corresponding period has elapsed in the state that the inspection of the blocking unit is not made, for example, the set inspection period is 15 days, even though the warning message is output twice a day, the inspection of the blocking unit is not made If not, the control unit 101 transmits the check status of the current customer to the electrical safety inspection management center in step S213. The check situation is an output situation for the warning message, and includes a message output period, a print frequency, and the like.

In this case, the processing for the situation transmission may be made to control the blocking unit by determining whether or not the risk based on the insulation resistance measurement value detected to date or the wired call to the corresponding customer. This is a control command according to a dangerous situation, and is intended to block the possibility of a later occurrence when the leakage current is higher than the reference, the insulation resistance is lower than the reference, or nevertheless, the wire call is not made. Based on this procedure, the controller 101 receives a control message through the short range communication unit 111 in step S215.

The control message reads the control message in step S217 as a control command for forcibly tripping the blocking unit or for holding a predetermined time. If the control message is a control command for turning off the power, a forced trip to the blocking unit 117 is made in step S219 or the state will be held for a predetermined time.

As described above, the remote electrical safety inspection system according to the present invention, by remotely replace the electrical check that must be performed artificially by the inspector, not only minimizes the manpower required during the electrical check, but also part of the ubiquitous In addition, it is expected that the industrial use value will be high enough by establishing a remote monitoring system to increase the efficiency and completeness of electrical safety monitoring.

1 is a block diagram showing a remote electrical safety inspection system according to the present invention.

FIG. 2 is a flowchart for explaining a main operation of FIG. 1.

<Explanation of symbols for main drawings>

101: control unit 103: noise filter

105: first filter / amplifier circuit 107: second filter / amplifier circuit

109: trip control unit 111: short-range communication unit

113: display unit 115: message output unit

117: breaker 119: transformer

121: rectifier circuit

Claims (8)

A breaker including an electronic switch (MS), a circuit breaker (MCCB), and an earth leakage breaker (ELCB), a CT coupled to an output terminal of the breaker to detect current, and a current transformer (ZCT) for detecting a leakage current. A remote electrical safety check system comprising a first filter / amplifier circuit and a second filter / amplifier circuit for providing a shaped waveform for a given current, The output signals of the first filter / amplifier circuit and the second filter / amplifier circuit are processed into digitized information to measure overvoltage, overcurrent, leakage current, and insulation resistance, and in response to a periodic inspection request signal received from the outside. A controller guiding self-checking of the blocking unit, detecting an operation state of the blocking unit according to the self-check, and managing the detection result as formatted data; A blocker operation connected to an input / output port of the controller to wirelessly transmit measurement information such as insulation resistance and ground resistance based on the measurement of the overvoltage, overcurrent, leakage current, and insulation resistance, or to receive and periodically respond to the periodic inspection request signal. A short range communication unit for controlling transmission of a status signal; And It includes a communication device that is installed in close proximity to the customer corresponding to the short-range communication unit, and transmits and controls the measurement information and the operation state signal to the management center, The control unit, Although the self-inspection is required by the user, despite the continuous request, the self-inspection of the breaker is not performed, and the insulation resistance and the ground resistance values detected from the first filter / amplifier circuit and the second filter / amplifier circuit are not determined. The remote electric safety check system, characterized in that it further comprises a trip control unit for forcibly tripping the cut-off unit. The method of claim 1, The control unit may further include a display unit configured to display textual or graphic information for the blocking unit inspection guide as an output port, or to provide insulation resistance and ground resistance measurement information to a user according to a remote inspection. Electrical safety check system. The method according to claim 1 or 2, The control unit further comprises a message output unit for outputting a warning message, such as a voice signal or an alarm signal for requesting the operation test of the blocking unit to the user in response to the periodic inspection request. The method of claim 3, wherein The message output unit is a remote electric safety check system, characterized in that the beep signal using a piezo, or a voice signal for guidance using a speaker. The method of claim 3, wherein The control unit stores and manages the number of outputs when outputting the warning message, the short-range communication unit remote electric safety check system, characterized in that for transmitting the warning time information, the number of times information and the like for the warning message. The method of claim 1, The short range communication unit is a remote electrical safety check system, characterized in that any one of the communication method of the Bluetooth, HomeRF, Zigbee, high-speed wireless LAN, wireless 1394 and UWB (Ultra Wide Band) is applied. The method of claim 1, The communication apparatus may be any one of a communication system such as a Home Phoneline Networking Alliance (HomePNA) using a telephone line, an IEEE 1394 for high-speed AV multimedia data transmission, and a PLC (Power Line Communication) using a power line pre-wired in a home. Remote electrical safety check system characterized by. delete

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