KR101826693B1 - Portable checking apparatus for electricity safety, and system for electricity safety including the same - Google Patents

Abstract

The present invention relates to a portable electrical safety checking system which comprises: an electrical safety checking apparatus for measuring and checking a state of an electrical facility of an electrical safety checking target; and an electrical safety management server for receiving measurement data from the safety checking apparatus, analyzing the received measurement data, and generating a report based on the analyzed result. According to the present invention, since a safety check of the electrical facility can be performed while simply carrying the electrical safety checking system, the safety check can be easily performed whenever and wherever.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a portable electric safety check device and an electric safety check system including the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electrical safety inspection, and more particularly, to an apparatus and a system capable of measuring electrical equipment to be subjected to an electrical safety check.

The electric safety manager prescribed in the Electricity Business Act shall establish and maintain a plan of inspection for the measurement cycle and test items according to the types of electricity related inspections, and prepare and maintain a record of safety management. Such an electric safety manager's job is to prevent electric shocks and electric safety management.

However, there is a problem that the electric safety manpower with skilled knowledge and skill is not enough, the inspection by each type of inspection, the inspection by each test item and the calibration of the measuring instrument are not efficiently performed, and there is a problem in safety, Concerns have arisen.

In addition, even if the electric safety manager has skilled knowledge and skills, if there is no effective job management, omission of the inspection object, omission of the test item, and safety accident may occur, resulting in the risk of labor and cost.

Recently, IT and digital technologies such as digital switchgear and smart distribution panel (part of the research project of electric power IT countries) have been introduced to solve the problems of electrical safety management of power plant by the manpower and to perform efficient electric safety management by combining IT technology. Remote electrical safety inspection technology for monitoring electric safety elements (leakage, insulation resistance, etc.) based on technology has been developed or is being researched. However, these remote electric safety inspection techniques are rarely practically applied since the users are often reluctant to spend additional expenses on remote electric safety inspection and management.

As a result, the current inspection system for electric safety inspections requires the inspectors to visit the inspection site directly and carry out inspections on a planned period basis. However, such an inspection system has problems in that it can not be efficiently measured, checked, and calibrated, and there is a possibility that a subject to be inspected, a test item to be omitted, and a safety accident may occur.

Korean Patent Publication No. 10-2007-0068762

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a portable electric safety device capable of performing safety inspection of an electric facility while carrying it easily and automatically generating a measurement item according to customer information, And an electric safety inspection system including the same.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, an electric safety inspection system according to the present invention is portable and includes an electric safety check device for measuring and checking the condition of an electric equipment subject to an electric safety check, and a controller for receiving measurement data from the safety check device, And an electrical safety management server for analyzing the received measurement data and generating a report based on the analyzed result.

The electrical safety management server can transmit the report to the e-mail address of the customer included in the customer information registered in advance.

In one embodiment of the present invention, the pre-registered customer information includes a customer name, a contact address, a receiving voltage, a receiving capacity, a generating voltage, a generating capacity, an electrical equipment list, Information, and other customer information.

The electrical safety management server can analyze harmonics of voltage and current waveforms of received measurement data, calculate power and power factor data, and analyze temperature data.

The electric safety inspection apparatus includes a measurement section for performing measurement on a measurement item including an insulation voltage, a ground resistance, an infrared temperature, a voltage, a current, a frequency and a leakage current of the electric equipment to be inspected, A storage unit for storing data and customer information, an input unit for receiving an input signal from a user, a display unit for displaying a video signal including data measured by the measurement unit, a communication unit for communicating with the electrical safety management server, Wherein the control unit controls the overall operation of the electrical safety check device and transmits measurement data measured by the measurement unit to the electrical safety management server via the communication unit and receives measurement items of the electrical equipment to be checked through the communication unit, A control for displaying a video signal including measurement data through the display unit The can be done, including.

The controller may change the internal power according to a measurement item being measured by the measurement unit.

If the customer name is input through the input unit, the control unit selects customer information corresponding to the inputted customer name from the customer information previously registered in the storage unit, and generates a measurement item to perform measurement according to the selected customer information have.

The controller divides the selected customer information into a low-pressure facility and a high-pressure facility according to the magnitude of the received voltage, thereby generating a measurement item.

The controller may analyze the quality of the power measured by the measuring unit and evaluate the suitability. At this time, the controller may calculate the total harmonic distortion (THD), the power factor, the power, and the unbalance ratio of the power source measured by the measurement unit, and analyze the quality of the power source by evaluating the respective suitability.

According to the present invention, since the safety check of the electric equipment can be performed while carrying the device easily, safety inspection of the electric equipment can be easily performed anytime and anywhere.

Further, according to the present invention, measurement items are automatically generated according to customer information, thereby contributing to the convenience of the user.

Further, according to the present invention, the inspection result information is sent to the pre-registered e-mail address, so that the safety inspection information can be collected quickly and easily.

1 is a view showing an electrical safety inspection system according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating an internal configuration of a portable electric safety inspection apparatus according to an embodiment of the present invention. Referring to FIG.
FIG. 3 is a view showing a simplified appearance of a portable electric safety check system according to an embodiment of the present invention.
4 is a diagram illustrating a method of changing internal power according to a measurement item of a measurement unit according to an embodiment of the present invention.
5 is a chart illustrating a list of low-pressure equipment and high-pressure equipment according to an embodiment of the present invention.
6 is a diagram illustrating a low-pressure facility measurement algorithm in accordance with an embodiment of the present invention.
7 is a diagram illustrating a high-pressure facility measurement algorithm according to an embodiment of the present invention.
FIG. 8 is a diagram illustrating a method of determining power quality according to an embodiment of the present invention. Referring to FIG.
FIG. 9 is a chart illustrating a measured infrared deterioration image determination criterion according to an embodiment of the present invention.
10 to 16 are illustrations of an electrical safety check report according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted in an ideal or overly formal sense unless expressly defined in the present application Do not.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

1 is a view showing an electrical safety inspection system according to an embodiment of the present invention.

Referring to FIG. 1, the electrical safety inspection system of the present invention includes a portable electrical safety inspection apparatus 100 and an electrical safety management server 200.

The portable electric safety inspection apparatus 100 is in a portable form and measures and checks the state of the electric equipment subject to the electric safety inspection.

The electrical safety management server 200 receives the measurement data from the safety check device 100, analyzes the received measurement data, and generates a report based on the analyzed result. For example, a report can be generated based on a job notification.

In the present invention, the electrical safety management server 200 may transmit the report to the e-mail address of the customer included in the customer information registered in advance. In the case of regular inspections, reports may also be sent to the Safety Corporation.

The electrical safety management server 200 can analyze voltage and current waveforms of received measurement data, analyze harmonics, calculate power and power factor data, and analyze temperature data.

FIG. 2 is a block diagram showing an internal configuration of a portable electric safety check device according to an embodiment of the present invention, and FIG. 3 is a view showing a simplified appearance of a portable electric safety check device according to an embodiment of the present invention .

2 and 3, the portable electric safety inspection apparatus of the present invention includes a measuring unit 110, a storage unit 120, an input unit 130, a display unit 140, a communication unit 150, .

The measuring unit 110 measures the measurement items including the insulation voltage, the ground resistance, the infrared temperature, the voltage, the current, the frequency, and the leakage current of the electrical equipment subject to the electrical safety check.

The storage unit 120 stores measurement data measured by the measurement unit 110 and pre-registered customer information. In the present invention, the storage unit 120 may store a waveform for each measurement item.

The input unit 130 receives an input signal from a user. For example, the input unit 130 may be implemented as a keypad, a touchpad, or the like.

The display unit 140 serves to display a video signal including data measured by the measuring unit 110.

The communication unit 150 serves to communicate with the electrical safety management server 200.

The control unit 160 controls the overall operation of the electrical safety check system.

Specifically, the control unit 160 transmits the measurement data measured by the measurement unit 110 to the electrical safety management server 200 through the communication unit 150, and transmits the measurement items of the electrical equipment to be checked through the communication unit 150 And the display unit 140 displays the video signal including the measurement data.

The storage unit 120 stores the customer information such as customer name, contact information, address, faucet voltage, faucet capacity, generation voltage, power generation capacity, electric equipment list, water distribution facility capacity, load equipment list, Customer information is stored.

4 is a diagram illustrating a method of changing the internal power according to a measurement item being measured by the measurement unit 110 according to an exemplary embodiment of the present invention.

Referring to FIG. 4, in the case of measuring the insulation resistance, an internal power supply of a high voltage DC 1000 V or a DC 500 V of a low voltage DC 500 V is switched and connected. When measuring a grounding resistance, Switching and connecting, and when analyzing the power quality by measuring the waveform of the AC voltage (alternating current), switch it to DC 5 V DC power supply and connect it and measure infrared thermal image through the infrared temperature camera , And switches to a DC power source that matches the camera for infrared temperature photography.

In the embodiment of FIG. 3, the electric safety check system 100 has an input unit 130 and a display unit 140 on its front surface. A DC / AC sensor connection terminal 210, an infrared camera connection terminal 230, a communication terminal 230 required for wired connection, and a charging terminal 240 for charging are disposed on a side surface. The DC / AC sensor connection terminal 210 is connected to a sensor for measuring an object such as an insulation resistance, a ground resistance, an AC voltage, an AC current, a frequency, and a leakage current.

In an embodiment of the present invention, when a customer name is input through the input unit 130, the controller 160 selects customer information corresponding to the customer name input from the customer information previously stored in the storage unit 120, The measurement item to be measured can be generated in accordance with the measurement result. Here, the control unit 160 may divide the selected customer information into a low-pressure facility and a high-pressure facility according to the magnitude of the reception voltage, thereby generating a measurement item. For example, if the AC voltage is 600 [V] and the DC voltage is 750 [V] or more, the high voltage equipment is classified as a high voltage equipment and the lower voltage equipment is classified as a low voltage equipment Respectively. When a specific facility is selected from the selected customer information, it is classified into a low-pressure facility and a high-pressure facility based on the receiving voltage of the selected facility.

5 is a chart illustrating a list of low-pressure equipment and high-pressure equipment according to an embodiment of the present invention.

Referring to FIG. 5, the low-voltage equipment may include a distribution board, a circuit breaker, a switch, a wiring, an electric motor, an electric heating equipment, and a lighting equipment, and the high voltage equipment includes a lightning arrester, a transformer, a power fuse, , And load facilities. However, the distinction between low-pressure equipment and high-pressure equipment is merely an example. For example, if an electric motor uses an AC voltage of 600 [V] or more, the motor can be classified into high-voltage equipment.

6 is a diagram illustrating a low-pressure facility measurement algorithm in accordance with an embodiment of the present invention.

Referring to FIG. 6, in the case of the low-voltage equipment, the insulation resistance and the grounding resistance are measured on a half-cycle basis in the main trunk, the leakage current is measured on a quarterly basis, and the appearance of the entire equipment is inspected. The checking apparatus 100 or the electrical safety management server 200 can guide half-life or branching from the measurement date or guide the set measurement day (or measurement period).

7 is a diagram illustrating a high-pressure facility measurement algorithm according to an embodiment of the present invention.

7, in the case of high-voltage equipment, insulation resistance, leakage current, and grounding resistance are measured for each year in the main trunk, the insulation resistance of the transformer is measured for each year, and insulation resistance and grounding resistance The infrared thermal image of the 3-phase charger is measured quarterly, the quality of the power is analyzed in the main trunk for each year, and the overall appearance of the equipment is checked. The inspection apparatus 100 or the electrical safety management server 200 can guide the annual, semi-anniversary, or branch, or guide the set measurement date (or measurement period) from the measurement date.

The control unit 160 may analyze the quality of the power measured by the measuring unit 110 to evaluate suitability. At this time, the controller 160 calculates the THD (Total Harmonic Distortion), power factor, power, and imbalance ratio of the power measured by the measuring unit 110, and analyzes the quality of each power source have.

For example, in the case of THD, first, the frequency domain is transformed by an FFT (Fast Fourier Transform) algorithm, and the distortion factor of voltage and current is calculated by THD equation calculation.

Then, the power factor is obtained by using the phase difference between the voltage and the current waveform. The power factor means the ratio of the effective power to the apparent power.

Then, the amplitude, frequency, effective value, phase difference, etc. are derived from the waveform of voltage and current, and active power, reactive power, apparent power and the like are calculated therefrom.

Then, the unbalance rate is calculated from the active power value of each phase.

The formula to calculate the voltage imbalance rate is as follows.

The equation for calculating the imbalance rate in Equation (1) is an approximate equation that calculates only the magnitude of the voltage and does not consider the phase value.

The standard of voltage unbalance rate varies depending on the institution, and it is usually recommended to be within 1 to 4%. For example, the National Equipment Manufacturers Association (NEMA) recommends less than 1%. In case of Korea transmission line, it is within 3%. In case of Korean extension regulations, it is recommended to be within 4%.

An example of the determination criteria of the insulation resistance measured in the present invention is as follows, and the unit is [MΩ].

First, in the case of high pressure, the high voltage disconnector is 500 or more, the high voltage breaker is 500 or more, the high voltage AC load switch is 100 or more, the high voltage mold type transformer is 1000 or more, the high voltage capacitor is 100 or more, , It is judged as normal.

In the case of low voltage, when the ground voltage is 150 [V] or less, it is 0.1 or more. When the ground voltage is 150 to 300 [V], it is 0.2 or more. When the ground voltage is 300 to 400 [ , And when the ground voltage is 400 [V] or more, it is judged to be normal when it is 0.4 or more.

Next, the determination criteria of the insulation resistance measured in the present invention will be described as follows.

It is judged as normal when less than 10 [Ω] for the first class ground, normal when it is less than 5 [Ω] for the second class ground, and normal when it is less than 100 [Ω] for the third class ground , And when it is 10 [Ω] or less in the case of special three-class grounding, it is judged as normal.

FIG. 8 is a diagram illustrating a method of determining power quality according to an embodiment of the present invention. Referring to FIG.

Referring to FIG. 8, when the current unbalance rate is less than 30%, it is determined to be suitable. When the current unbalance rate is more than 30%, it is judged to be critical. If the power factor is 90% or more, it is determined to be suitable. If the power factor is less than 90%, it is judged to be critical. If the electric power is below the facility capacity criterion, it is judged to be suitable. If the electric power capacity criterion is exceeded, it is judged to be careful.

FIG. 9 is a chart illustrating a measured infrared deterioration image determination criterion according to an embodiment of the present invention.

Referring to FIG. 9, it is determined that the temperature difference of the infrared ray deteriorated image is 5 ° C or less. If the temperature difference is more than 5 ° C and less than 10 ° C, it is judged to be careful. Here, the temperature difference is the difference between the maximum value and the minimum value.

10 to 16 are illustrations of an electrical safety check report according to an embodiment of the present invention.

10 is a report on the inspection results of the low-pressure equipment and the high-pressure equipment in the report format, Fig. 11 is a chart of the measurement of the insulation resistance and leakage current, and Fig. 12 is the chart of the grounding resistance measurement. 13 is a transformer inspection chart, and FIG. 14 is a preliminary power plant inspection chart. 15 is an infrared thermal image distribution measurement chart, and FIG. 16 is a power quality measurement chart.

While the present invention has been described with reference to several preferred embodiments, these embodiments are illustrative and not restrictive. It will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit of the invention and the scope of the appended claims.

100 Electrical safety check device
200 electrical safety management server
110 measuring unit
120 storage unit
130 input unit
140 display unit
150 communication unit
160 control unit

Claims (16)

An electric safety check device for measuring and checking the condition of the electric equipment subject to electric safety inspection; And
And an electrical safety management server for receiving measurement data from the safety check device, analyzing the received measurement data, and generating a report based on the analyzed result,
The electrical safety management server transmits the report to an e-mail address of a customer included in the customer information registered in advance,
The pre-registered customer information includes customer information such as customer name, contact address, address voltage, receptacle capacity, generation voltage, power generation capacity, electrical equipment list, power distribution equipment capacity, load equipment list, In addition,
The electrical safety management server analyzes the harmonics of the voltage and current waveforms of the received measurement data, calculates power and power factor data, analyzes the temperature data,
The electric safety check device includes:
A sensor for sensing an object to be measured of a measurement item including an insulation resistance of the electric equipment to be inspected, a grounding resistance, an infrared temperature, a voltage, a current, a frequency and a leakage current and a sensor connection terminal for connection with the sensor part;
A storage unit for storing measurement data and customer information measured by the measuring unit;
An input unit for receiving an input signal from a user;
A display unit for displaying a video signal including data measured by the measuring unit;
A communication unit for communicating with the electrical safety management server; And
Wherein the control unit controls the overall operation of the electrical safety check device and transmits measurement data measured by the measurement unit to the electrical safety management server via the communication unit and receives measurement items of the electrical equipment to be checked through the communication unit, And a controller for displaying a video signal including measurement data through the display unit,
Wherein the controller changes internal power according to a measurement item being measured by the measurement unit,
If the customer name is input through the input unit, the control unit selects customer information corresponding to the inputted customer name from the customer information pre-stored in the storage unit, generates a measurement item to perform measurement according to the selected customer information,
The controller divides the selected customer information into a low-pressure facility and a high-pressure facility according to the magnitude of the received voltage, generates a measurement item accordingly,
The control unit calculates the total harmonic distortion (THD) of the voltage and current of the power source measured by the measuring unit by analyzing the quality of the power measured by the measuring unit, and determines the phase difference between the voltage and the current waveform Frequency, effective value, and phase difference from the waveform of voltage and current, calculating the effective power, the reactive power, and the apparent power, calculating the unbalance rate from the effective power value of each phase,

And the quality of the power supply is analyzed by a method of evaluating whether or not the calculated unbalance rate is within a predetermined value.
delete delete delete delete delete delete delete delete A sensor for sensing an object to be measured of a measurement item including an insulation resistance of the electrical equipment subject to the electrical safety inspection, a grounding resistance, an infrared temperature, a voltage, a current, a frequency and a leakage current and a sensor connection terminal for connection with the sensor ;
A storage unit for storing measurement data and pre-registered customer information measured by the measurement unit;
An input unit for receiving an input signal from a user;
A display unit for displaying a video signal including data measured by the measuring unit;
A communication unit for communicating with the electrical safety management server; And
Wherein the control unit controls the overall operation of the electrical safety inspection apparatus and transmits the measurement data measured by the measurement unit through the communication unit to the electrical safety management server and receives the measurement item of the electrical equipment to be checked through the communication unit, And a control unit for displaying a video signal including measurement data through a display unit,
The pre-registered customer information includes customer information such as customer's name, contact, address, faucet voltage, faucet capacity, generation voltage, power generation capacity, electrical equipment list, power distribution capacity, load equipment list, safety manager information In addition,
Wherein the controller changes an internal power supply according to a measurement item being measured by the measurement unit,
If the customer name is input through the input unit, the control unit selects customer information corresponding to the inputted customer name from the customer information previously registered in the storage unit, generates a measurement item to perform measurement according to the selected customer information,
The control unit divides the selected customer information into a low-pressure facility and a high-pressure facility according to the size of the reception voltage, generates a measurement item accordingly,
The control unit calculates the total harmonic distortion (THD) of the voltage and current of the power source measured by the measuring unit by analyzing the quality of the power measured by the measuring unit, and determines the phase difference between the voltage and the current waveform Frequency, effective value, and phase difference from the waveform of voltage and current, calculating the effective power, the reactive power, and the apparent power, calculating the unbalance rate from the effective power value of each phase,

And the quality of the power source is analyzed by a method of evaluating whether or not the calculated unbalance rate is within a predetermined value or not. delete delete delete delete delete delete

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