KR101417897B1 - Apparatus of measuring the partial discharge and method for measuring the same - Google Patents

Abstract

The present invention relates to a partial discharge measuring apparatus and method for reducing a measurement time and a waste of a workpiece by measuring partial discharge while automatically switching a plurality of channels at set times, A plurality of sensor units for detecting a plurality of channels, a plurality of sensor units for detecting a plurality of channels, a plurality of sensor units for detecting a plurality of channels, And a display unit for displaying the partial discharge information analyzed from the portable equipment unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a partial discharge measuring apparatus and a method thereof,

The present invention relates to a partial discharge measuring apparatus and a method thereof, and more particularly, to a partial discharge measuring apparatus and a method for reducing a partial discharge measuring time and a waste of a work force.

Generally, if an arc or partial discharge occurs in an electrical equipment or a booth / cable that constitutes a switchboard, a distribution panel, a motor control panel, or if maintenance is not carried out at an early stage, a flashover accident, an electric shock accident or an electric fire may occur.

When an arc or a partial discharge occurs in the electrical equipment, the booth, the cable, etc. constituting the above-mentioned switchgear, distribution panel, motor control panel, etc., various phenomena occur such as current pulse, heat, light, electromagnetic wave and sound. Generally, arc or partial discharge in the switchgear causes inductance A sensor, a Rogowski coil, a high-frequency CT, etc. are mounted on a grounding line of the switchgear to measure a current pulse flowing through a ground line when a partial discharge or an arc occurs, or a light sensor Method and so on.

When the power equipment is installed in a large area, the conventional partial discharge measuring apparatus includes a sensor, a portable device, a cable and a PC. The sensor senses a partial discharge signal from the sensor, After receiving the discharge signal and analyzing it, it transfers it to the PC via cable and displays it.

However, in the conventional partial discharge measuring apparatus, a sensor is installed in only a part of a plurality of channels to detect a partial discharge, and the result of the partial discharge is displayed through a PC. In the partial discharge measuring apparatus, Since the partial discharge is being measured, it takes a lot of time and manpower when the manager wants to diagnose a wide area.

That is, when measuring a partial discharge at a wide place, since a sensor for measuring a partial discharge must be directly transferred, measurement time must be long and a large number of personnel must be mobilized.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a partial discharge measuring apparatus and a method thereof for reducing a measurement time and a waste of a workforce by measuring a partial discharge, There is a purpose.

According to an aspect of the present invention, there is provided a partial discharge measuring apparatus including a plurality of sensor units installed in a plurality of channels to detect partial discharges, A portable equipment unit for analyzing and outputting the partial discharge signal received from the respective sensor units and for outputting the partial discharge information analyzed by the portable equipment unit; And a display unit.

According to another aspect of the present invention, there is provided a method of measuring a partial discharge, comprising: connecting a plurality of sensor units, an automatic transfer unit, a portable equipment unit, and a display unit installed in a plurality of channel units with a cable; Assigning a number of channels, a switching time, a mode setting (automatic or manual), an ending time, and a frequency to the automatic switching unit; Detecting a partial discharge for a corresponding channel using the sensor unit according to a condition of a function given to the automatic transfer unit; Confirming whether the automatic switching unit operates normally and continuing to detect a partial discharge in a normal operation; Analyzing the partial discharge signal measured by the sensor unit and analyzing the received partial discharge signal; Displaying and analyzing the analyzed result on the portable equipment unit on the display unit; Determining whether there is an abnormality in the partial discharge signal displayed on the display unit, and storing the data if there is an abnormality.

The partial discharge measuring apparatus and method according to the present invention has the following effects.

That is, by measuring the partial discharge while automatically switching a plurality of channels at the set time, it is possible to reduce the measurement time and wasted manpower.

1 is a schematic view showing a partial discharge measuring apparatus according to the present invention
2 is a flowchart schematically showing a partial discharge measuring method according to the present invention.
3 and 4 are views showing a channel information setting function and a screen displayed on the display unit in the partial discharge measuring apparatus according to the present invention.

Hereinafter, a partial discharge measuring apparatus and method according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

In addition, the same or corresponding components are denoted by the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. For convenience of explanation, the size and shape of each constituent member shown may be exaggerated or reduced have.

FIG. 1 is a schematic diagram showing a partial discharge measuring apparatus according to the present invention.

As shown in FIG. 1, the apparatus for measuring partial discharge according to the present invention includes a plurality of sensor units 110 installed in a plurality of channels to detect partial discharge, An automatic transfer unit 120 for selectively transferring the sensor units 110 and a portable equipment unit 130 for receiving the partial discharge signals measured by the sensor units 110 and analyzing and outputting the partial discharge signals, And a display unit 140 for displaying the partial discharge information analyzed from the portable equipment unit 130.

Here, the portable equipment unit 130 receives the partial discharge signals detected through the sensor unit 110 at predetermined time intervals through the time set in the automatic transfer unit 120, for the plurality of channels Analyze.

(Automatic or manual), end time, frequency, and the like to the automatic transfer unit 120 so that the partial discharge of the corresponding channel is supplied to the sensor unit 110 .

That is, the number of channels to be measured, the transfer time, the mode setting (automatic or manual), the end time, and the frequency of the partial discharge to be measured are added to the automatic transfer unit 120 so that the sensor unit 110 The partial discharge can be detected while automatically switching.

The sensor unit 110 and the automatic transfer unit 120 are connected to each other by a coaxial cable (SMA type N type) to exchange data. The portable equipment unit 130 and the display unit 140 are connected to each other by an RS232 type cable And displays the status of the partial discharge on the display unit 140 through mutual communication.

When the sensor unit 110 receives the detected partial discharge signal and analyzes it from the portable equipment unit 130, it can automatically store data through the display unit 140 only when it is confirmed that partial discharge is detected And diagnosis is resumed based on the stored data.

In addition, when the end time is completed in the automatic transfer unit 120 and the diagnosis of the partial discharge is completed, the controller automatically terminates the entire system and determines the stored partial discharge generation waveform through the display unit 140 by the administrator.

That is, in the conventional case, the administrator checks data on the PC in real time in real time, and then checks whether the partial discharge has occurred. However, in the present invention, when the end time of the partial discharge is set in the automatic transfer unit 120 The display unit 140 can be reconfirmed that the partial discharge has occurred before the administrator even if it is not in the field.

2 is a flowchart schematically showing a partial discharge measuring method according to the present invention.

2, a plurality of sensor units 110, an automatic transfer unit 120, a portable equipment unit 130, and a display unit 140, which are installed in a plurality of channel units, (S110).

Here, the sensor unit 110 and the automatic transfer unit 120 are connected to each other by a coaxial cable (SMA type N type), and the portable equipment unit 130 and the display unit 140 are connected to each other via an RS232 type cable .

Subsequently, the number of channels, the switching time, the mode setting (automatic or manual), the end time, and the frequency are given to the automatic switching unit 120 at step S120.

Here, various functions are externally given to the automatic transfer unit 120 by program input. When the sensor unit 110 operates according to a function given to the automatic transfer unit 120, the partial discharge is detected do. In other words, a CPU (not shown) is built in the automatic transfer unit 120, and various functions are input to the CPU to control the operation of the sensor unit 110 or to control the operation of the sensor unit 110 And transmits the detected partial discharge signal to the portable equipment unit 130.

Subsequently, the sensor unit 110 detects a partial discharge for the channel according to the condition of the function given to the automatic transfer unit 120 (S130).

Here, the sensor unit 110 is attached to a plurality of channels, diagnoses a partial discharge signal for each channel according to the control of the automatic switching unit 120, and ends the process.

That is, when the area to be diagnosed is wide, conventionally, a small number of sensors are used to measure partial discharges for each channel while moving, but in the present invention, the sensor unit 110 is installed so as to correspond to each channel, The partial discharge can be selectively measured with respect to a desired channel by the unit 120, so that the measurement time of the partial discharge can be shortened and the attractive force can be minimized.

Then, it is checked whether the automatic switching unit 120 and the sensor unit 110 are operating normally (S140). That is, it is possible to diagnose the detection of the partial discharge more accurately by diagnosing whether the functions set in the automatic switching unit 120 are normally operated.

If the automatic switching unit 120 and the sensor unit 110 do not operate normally, the various functions assigned to the automatic switching unit 120 are reset.

In operation S150, the portable device 130 analyzes the partial discharge signals measured by the sensor units 110 and analyzes the partial discharge signals. Herein, the analysis of the partial discharge signal is performed by comparing a reference value set in an arbitrary manner and a value detected through the sensor unit 110 through a waveform.

Then, the analyzed result is displayed on the display unit 140 and monitored in the portable equipment unit 130 (S160).

Then, it is determined whether the partial discharge signal displayed on the display unit 140 is abnormal (S170).

If a partial discharge occurs, the event is stored (S180). That is, the data is stored only when the partial discharge occurs. Even if the manager does not work in the field, the partial discharge can be confirmed based on the stored data because the partial discharge is stored.

Then, it is determined whether the diagnosis time has been completed in the function assigned to the portable equipment unit 130 (S190). If the diagnosis end time is not completed, the partial discharge is continuously detected.

When the diagnosis end time is completed, the diagnosis is terminated (S200).

3 and 4 are views showing a channel information setting function and a screen displayed on the display unit in the partial discharge measuring apparatus according to the present invention.

As shown in FIG. 3 and FIG. 4, when the partial discharge is detected with respect to the channel 4, it can be seen that the normal, that is, the partial discharge is not detected.

Table 1 below illustrates channel information in the partial discharge measuring apparatus according to the present invention.

As shown in Table 1, the channel number, the channel name, the threshold voltage, the event level, the maximum event density, the minimum event density, the maximum number of events / 15 minutes, PD (waveform) event storage, Masking, channel address, channel port, current status, firmware version, information update date, X axis angle, Y axis angle, 3D depth, perspective effect, chart number, cluster information.

number title Contents One Channel number Selected channel number 2 Channel name Selected channel name 3 Threshold voltage If it is lower than threshold voltage, it is ignored. If it exceeds threshold voltage, it is included in 15 minutes data and 15 minutes data is extracted. Trend view shows average and maximum value of 15 minutes data. 4 Event Level If it is lower than the event level, it is ignored. If the event level is exceeded, the event occurs (data value of 1 second from the moment the event level is exceeded) 5 Maximum event density Maximum density of generated event% Shows the value only by maximum density. ex) If the maximum event density is 100%, if the data exceeds 3840, it is not recognized as an event. 6 Minimum event density Minimum density of generated event% Minimum density should be displayed. ex) If the minimum event density is 10%, if 384 data is not available, it is not recognized as an event. 7 Maximum events / 15 minutes It shows only the maximum number of events for 15 minutes. If you set the maximum number of events / 15 minutes to 100, the value will not be saved if the number of events is more than 100 for 15 minutes. After fifteen minutes, the number of events is again 100. 8 PD Event level after saving If TRUE, the event level must be higher than the current event level when the event occurs. After 15 minutes, it is initialized and changed to the currently set event level. If FALSE, an event occurs but only if it is higher than the current event level. 9 Phase correction value Angle to correct phase 10 Acquisition frequency Used when you want to obtain only one acquisition frequency. 11 ATTN Surveillance intensity (highest at 0dB) 12 Masking Masking presence 13 Channel address Selected channel address 14 Channel port Selected channel port 15 Current Status The current state of the selected channel 16 Firmware version Current firmware version 17 Information Update Date Date the information was updated. 18 X-axis angle PRSP (3D) in Event View X-axis angle of the chart 19 Y axis angle PRSP (3D) in the event view Y axis angle of the chart 20 3D Depth The depth of the PRPS (3D) chart in the event view 21 Perspective effect The perspective of the PRPS (3D) chart in Event View 22 Number of charts Number of charts in Event View 23 Cluster Overlap PRPD (2D) chart values in the event view

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Will be apparent to those of ordinary skill in the art.

110: sensor unit 120: automatic transfer unit
130: Portable equipment part 140: Display part

Claims (8)

A plurality of sensor units installed in a plurality of channels for detecting partial discharge,
An automatic switching unit for selectively switching the sensor units to detect partial discharges of the plurality of channels at set times,
A portable equipment unit receiving the partial discharge signal measured from each sensor unit and analyzing and outputting the partial discharge signal,
And a display unit for displaying partial discharge information analyzed from the portable equipment unit and automatically storing the partial discharge information only when a partial discharge occurs,
The automatic switching unit may be provided with any one of the number of channels to be measured for partial discharge, the switching time, the mode setting (automatic or manual), the ending time and the frequency so that the partial discharge of the corresponding channel is detected by using the sensor unit Wherein the partial discharge measuring device comprises: delete delete 2. The partial discharge measuring apparatus according to claim 1, wherein the sensor unit and the automatic transfer unit are connected by a coaxial cable to exchange data, and the portable equipment unit and the display unit are connected by an RS232 type cable. Connecting a plurality of sensor units, an automatic transfer unit, a portable equipment unit, and a display unit installed in a plurality of channel units to each other with a cable;
Assigning a function of any one of a number of channels, a switching time, a mode setting (automatic or manual), an end time, and a frequency to the automatic switching unit;
Detecting a partial discharge for a corresponding channel using the sensor unit according to a condition of a function given to the automatic transfer unit;
Confirming whether the automatic switching unit operates normally and continuing to detect a partial discharge in a normal operation;
Analyzing the partial discharge signal measured by the sensor unit and analyzing the received partial discharge signal;
Displaying and analyzing the analyzed result on the portable equipment unit on the display unit;
Determining whether there is an abnormality in the partial discharge signal displayed on the display unit and storing the data if there is an abnormality;
And terminating the operation of the sensor unit through the automatic transfer unit when the partial discharge does not occur as a result of the analysis from the portable equipment unit,
Wherein the display unit stores the data only when a partial discharge occurs from the portable equipment unit. The partial discharge detection method according to claim 5, wherein the analysis of the partial discharge includes comparing a reference value and a value detected through the sensor unit through a waveform. delete delete

Images