KR100971303B1 - Device and method for detecting corona - Google Patents

Abstract

PURPOSE: A corona detection apparatus and a method thereof are provided to determine accurately the abnormal level of power facility. CONSTITUTION: A sensing unit(110) selectively receives the corona ray between frequency of 180nm-260nm among the light signal from the corona created in the power facility, counts the numbers of the generated photoelectron by passing the generated corona ray through the photoelectric effect device, and detects the strength of the corona ray. A signal processor(120) changes the light intensity of the detected light into the voltage signal, amplifies the signal by eliminating the noise of transformed voltage signal, and produces the DC voltage from the amplified voltage signal. A controller(130) determines the abnormal level of power facility according to the voltage value by comparing the DC voltage with the pre-determined plural reference voltage value.

Description

Corona detection device and method {DEVICE AND METHOD FOR DETECTING CORONA}

The present invention relates to a corona detection device and method, and more particularly to a corona detection device and method that can determine the degree of abnormality of the power equipment by detecting the intensity of corona light to numerically display the degree of corona discharge.

Recently, the high pressure and large capacity of various power devices have been advanced due to the rapid development of the industry, and many efforts are being made to improve the stability and reliability of the power system to supply high quality power.

However, due to defects caused by poor manufacturing and installation of transmission and distribution lines, insulators, various connection points and electric power facilities, and deterioration due to environmental conditions such as salt and temperature and humidity, large electrostatic accidents due to accidents such as arc discharge, short circuit, ground fault, etc. It is occurring at home and abroad.

In general, accidents such as arc discharge, short circuit, and ground fault of high-voltage abnormal power facilities are caused by the breakdown of the insulation state that reaches the breakdown voltage.In addition to accidents due to sudden mechanical and physical causes, product defects and poor construction, and environmental conditions Gradual dielectric breakdown by the influence of the light may be preceded by a corona discharge phenomenon at a time when the threshold voltage in the air is exceeded. Here, the corona discharge phenomenon is a phenomenon in which the insulation of the air adjacent to the charging unit and the insulator of a power facility such as a line or insulator of high voltage or more is partially destroyed to generate light and noise.

Therefore, if corona discharge can be accurately measured in transmission and distribution lines, insulators, various connection points, and power facilities, accidents that may occur in various power facilities can be prevented in advance.

Conventional techniques for measuring corona discharge include high frequency, ultrasonic waves, thermal imaging equipment, seismic detection and visual inspection.

However, these conventional methods have a problem that the price of the equipment is expensive, the accuracy of detection is low because there are a lot of factors that can cause errors due to the miscellaneous signal due to weather, day and night use restrictions, surrounding environment (traffic and congestion, etc.).

In addition, manpower requirements and high level of expertise are required for the operation of the equipment, and there are a lot of problems in the operation that no one can easily use the equipment.

The present invention has been made to solve the above problems, to provide a corona detection apparatus and method that can accurately determine the degree of abnormality of the power equipment by detecting the corona light intensity to numerically display the degree of corona discharge.

In addition, the present invention can determine the abnormality of the power equipment without special skills, and can be easily carried during the instantaneous and inspection of the power facility to perform a test for a wide range of equipment in a short time, the operational constraints Less corona detection apparatus and methods.

According to one aspect of the invention, a corona detection device is provided.

Corona detection apparatus according to an embodiment of the present invention is a detection unit for detecting the intensity of the corona light generated in the power equipment, a signal processor for converting the intensity of the detected light into a DC voltage value and the power using the converted DC voltage value It includes a control unit for determining the degree of abnormality of the facility.

According to another aspect of the present invention, a corona detection method is provided.

Corona detection method according to an embodiment of the present invention detects the intensity of the corona light generated in the power equipment in the corona detection device, converting the detected light intensity to a DC voltage value and using the converted DC voltage value And determining an abnormal degree of the power equipment.

The present invention can accurately determine the degree of abnormality of the power equipment by sensing the corona light to numerically display the degree of corona discharge.

In addition, the present invention can determine the abnormality of the power equipment without special skills, and can be easily carried during the instantaneous and inspection of the power facility to perform a test for a wide range of equipment in a short time, the operational constraints little.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all transformations, equivalents, and substitutes included in the spirit and scope of the present invention. In the following description of the present invention, if it is determined that the detailed description of the related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

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

1 is a block diagram of a corona detection apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the corona detecting apparatus 100 includes a detector 110, a signal processor 120, a controller 130, a power supply 140, an input unit 150, an output unit 160, and an external device connection unit ( 170).

The detector 110 detects the intensity of corona light generated from the power facility. Here, the power equipment may be a transmission line, a connection point of the power equipment or insulator of the power distribution power equipment.

As described above, the corona light is a light in which the insulation of the charging unit and the air adjacent to the insulator of the power equipment of the high voltage or higher is partially destroyed, and may be mainly in a frequency region between 180 nm and 260 nm.

Therefore, the detector 110 selectively passes light in a frequency region between 180 nm and 260 nm corresponding to the UV-C region of the ultraviolet ray and measures the intensity of the light through the sensor.

The detector 110 may measure the intensity of light by counting the number of photoelectrons generated through the photoelectric effect due to the detected light.

At this time, the sensing unit 110 may include a high voltage generator 112 for generating a high voltage of 400V to 500V to generate a photoelectric effect.

 The signal processor 120 converts the detected light intensity into a DC voltage value. Here, the DC voltage value may be an integer.

The signal processor 120 may include a converter 122 in which the detected intensity of light is converted into a voltage signal, a filter and amplifier 124 for removing noise from the converted voltage signal, and amplifying the voltage signal, and an amplified voltage signal. May include an AD converter 126 converting the digital signal into a digital signal to calculate a DC voltage value.

The controller 130 determines the degree of abnormality of the power equipment by using the converted DC voltage value.

The controller 130 compares the calculated DC voltage value with at least one preset reference voltage value to determine the degree of abnormality of the power equipment.

The controller 130 controls the output unit 160 to output the abnormality of the power equipment to the output unit 160 as a video or audio signal.

In addition, when the input signal for the measurement is input, the controller 130 transmits a control signal for controlling the generation of high voltage to the high voltage generator 112 of the detector 110, so that the intensity of corona light generated in the power equipment is increased. Allow measurement.

The power supply unit 140 detects the amount of power of the charging unit 144 and the battery 142 that charges the battery by using the battery 142 and the external power source, and if the threshold value is less than or equal to the control signal to be displayed on the output unit 160. It includes a power monitoring and control unit 146 to generate.

The power supply unit 140 allows the corona detection apparatus 100 to be used in a portable manner, and thus there is no operational limitation.

For example, the battery 142 may use a rated 12V by connecting a 640mAh 3Cell in series with a lithium polymer battery, and the remaining amount indication may be displayed on the output unit 160 as a percentage (%).

The input unit 150 receives a control signal for operating the corona detection device.

The output unit 160 may include a video output unit 162 indicating an abnormal degree of the power equipment and an audio output unit 164 outputting audio signals such as an alarm.

The external device connection unit 170 connects an external device such as a sight sight that can be identified day and night, such as a dot sight or a laser pointer.

Here, the collimator 172 may be attached to the external device connecting portion at the time of the remote inspection of the power equipment to detect the abnormal signal can accurately detect the abnormal site.

2 is a flowchart illustrating a corona detection method according to an embodiment of the present invention.

Referring to FIG. 2, in operation S210, the corona detecting apparatus 100 aims the corona detecting apparatus at a power facility to be inspected and detects the intensity of corona light generated by the power plant. Here, the corona detection device 100 may be aimed at the power equipment more precisely by attaching a collimator.

In operation S220, the corona detecting apparatus 100 converts the sensed light intensity into a voltage signal.

In operation S230, the corona detecting apparatus 100 removes noise of the converted voltage signal and amplifies the voltage signal. The amplification of the voltage signal is because the intensity of light emitted by corona discharge is often weak.

In operation S240, the corona detecting apparatus 100 converts the amplified voltage signal into a digital signal to calculate a DC voltage value. Here, the DC voltage value may be an integer, and the analog voltage signal is digitized, and the calculated DC voltage value may be a maximum value, an instantaneous value, or a root mean square (RMS) value among the digitized values.

In operation S250, the corona detecting apparatus 100 determines an abnormality degree of the power equipment by using the converted DC voltage value.

More specifically, the corona detecting apparatus 100 compares the calculated DC voltage value with a plurality of preset reference voltage values, and observes an abnormal degree of the power equipment according to the voltage value, for example, as shown in Table 1 below. It can be judged as a state of caution, warning, and replacement.

step
Stage 1
(observe) Tier 2
(caution) Tier 3
(warning) 4 steps
(Replacement required) Detector indicator 30 or less 40 or less 50 or less 50 or more

[Table 1] Example of the state of power equipment according to DC voltage value

In addition, the corona detection apparatus 100 is converted to the insulation resistance measurement value used as a criterion for determining the degree of abnormality of the power equipment, as shown in Table 2 below is converted by a preset conversion equation to determine the presence or absence of power equipment health. Can be.

Insulation resistance measurement
(MΩ) 50
100
200
300
400
500
600
700
800
900
1000
DC voltage value 300 100 70 60 50 45 40 35 27 19 12

[Table 2] Example of DC voltage conversion value by insulation resistance measurement value

In step S260, the corona detection device 100 outputs a video signal or an audio signal of the abnormality of the power equipment.

3 is a view for explaining an external form of the corona detection apparatus according to an embodiment of the present invention.

Referring to FIG. 3, the corona detecting device 100 has a portable size, for example, about 380 mm in length, and an input unit 150, an LCD monitor output unit 160, and an external device with an operation switch on the top. The connection unit 170 and the dot sight collimator 172 may be located.

LCD monitor functions and switch operation descriptions are as follows, for example.

LCD Monitor Description

F: Outgoing frequency range setting (15Khz, Duty 5 optimal)

B: Battery level indicator (less than 60% charge required)

Vp: the highest value of the data

RM: Repeats the function to send the highest value of 50 instantaneous values to Vp

Operation Switch Description

Zero: When converting to the initial state, pressing the Enter key at the same time, the default value becomes "0".

Set: Press to change the setting value and a cursor is created below the number.

Shift: Move the created cursor to the desired position

Up: Change setting value

Enter: Change completed (2 beeps)

  Corona detection device 100 according to the present invention occurs in the event of facility failures by directing the transmission and distribution power facilities or tracks in the state of instantaneous inspection personnel walk or ride on the vehicle during the inspection and maintenance of power equipment, especially transmission line By detecting the corona signal, many inspection points can be checked in a short time.

 In addition, the corona detection apparatus 100 according to the present invention is displayed by converting the converted voltage [V] to be a number, anyone can easily read the number of the standard is presented, the standard, the production cost is conventionally Compared to economics.

An embodiment of the present invention may include a computer readable medium including program instructions for performing various computer-implemented operations. The computer readable medium may include a program command, a local data file, a local data structure, etc. alone or in combination. The media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

1 is a block diagram of a corona detection apparatus according to an embodiment of the present invention.

2 is a flowchart illustrating a corona detection method according to an embodiment of the present invention.

3 is a view for explaining the external form of the corona detection apparatus according to an embodiment of the present invention.

Claims (15)

Among the light signals generated by the corona generated by the power equipment, the corona light in the region of frequency between 180 nm and 260 nm is selectively received, and the received corona light is generated through a photoelectric effect device composed of a voltage of 400 V to 500 V. A detector for detecting the intensity of corona light by counting the number; A signal processing unit converting the detected intensity of light into a voltage signal, removing and amplifying noise of the converted voltage signal, and calculating a DC voltage value from the amplified voltage signal;  And a controller which compares the DC voltage value with a plurality of preset reference voltage values and determines a degree of abnormality of the power equipment according to the voltage value in stages. delete delete delete delete The method of claim 1, Corona detection apparatus further comprises an output unit for receiving and outputting information on the degree of abnormality of the power equipment determined from the control unit. delete The method of claim 1, And a dot sight or laser pointer collimator for determining the exact location of the power plant where the corona is generated. The method of claim 1, The power equipment is a corona detection device, characterized in that the transmission and distribution line, the connection point or insulator of the power equipment. In the corona detection device, Aim the corona detection device at the power equipment to be inspected and selectively receive corona light in the region of frequency between 180 nm and 260 nm among the light signals generated from the power equipment, and receive the received corona light at a voltage of 400 V to 500 V. Detecting the intensity of corona light by counting the number of photons generated through the made photoelectric effect device; Converting the sensed light intensity into a DC voltage value; And Corona detection method comprising the step of determining the abnormality of the power equipment using the converted DC voltage value. The method of claim 10, The step of converting the detected light intensity into a DC voltage value Converting the sensed light into a voltage signal; Removing noise of the converted voltage signal and amplifying the voltage signal; And And converting the amplified voltage signal into a digital signal to calculate a DC voltage value. The method according to claim 10 or 11, wherein Aiming the corona detection device to the power equipment to be inspected and detecting the intensity of corona light generated from the power equipment, Aiming a dot sight or laser pointer collimator to determine the exact location of the power plant where the corona light is generated; And Generating a voltage necessary to generate a corresponding number of photoelectrons according to the intensity of the corona light. The method according to claim 10 or 11, wherein Determining the degree of abnormality of the power equipment by using the converted DC voltage value compares the DC voltage value with a plurality of preset reference voltage values, and observes the abnormal degree of the power equipment according to the DC voltage value, Corona detection method characterized in that the judging in at least one of the state of warning, warning and replacement. The method according to claim 10 or 11, wherein Corona detection method further comprises the step of displaying information on the degree of abnormality of the determined power equipment. In the recording medium recorded with a program for implementing the corona detection method in the corona detection device, Aiming the corona detection device at a power facility to be inspected to selectively receive corona light in a region of a frequency between 180 nm and 260 nm among light signals generated by the corona generated at the power facility; Sensing the intensity of corona light by counting the number of photons generated by passing the received corona light through a photoelectric effect device comprised of a voltage of 400V to 500V; Converting the sensed light intensity into a DC voltage value; And And determining a degree of abnormality of the power equipment by using the converted DC voltage value. The recording medium having recorded thereon a program for implementing a corona detection method.

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