KR101527536B1 - Discharge Detector - Google Patents

Abstract

The present invention relates to a discharge detection device. A technical problem to be solved is estimating a discharge position and a discharge quantity in real time by the voltage value measured by a first electrical field sensor set arranged on one side of a measurement space for the discharge detection and a second electrical field sensor set arranged on the opposite side of the one side. The detection device comprises: multiple electrical field sensors arranged in the measurement space for the discharge detection; an input signal preprocessor filtering noise after receiving the voltage and a displacement current measured by a plurality of the electrical field sensor; a data process and analysis system estimating the discharge position and the discharge quantity by receiving a plurality of the voltage value and the current value filtered noise by the input signal preprocessor.

Description

DISCHARGE DETECTOR [0002]

The present invention relates to an electric discharge detection device.

Maintaining insulation in high-voltage and high-power appliances is a key factor in preventing human and material accidents. If insulation problems occur in high-voltage, high-power appliances, if you can take action quickly, you can prevent economic and material losses from accidents. In addition, discharges caused by the presence of defects in the insulating material or due to impacts due to transient voltages can temporarily or permanently reduce the insulation.

Japanese Patent Registration No. 5058281 (Aug. 10, 2012)

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above-mentioned problems of the prior art, and it is an object of the present invention to provide a method of detecting a discharge, which comprises a first set of electric field sensors mounted on one side in a measurement space for detecting a discharge, And a discharge detection device capable of estimating a discharge position and a discharge size in real time through a voltage value measured in an electric field sensor set.

According to an aspect of the present invention, there is provided an electric discharge detection apparatus comprising: a plurality of electric field sensors disposed in a measurement space requiring detection of a discharge; an input for filtering noise by receiving voltage and current measured by the plurality of electric field sensors; And a data processing and analyzing device for receiving a plurality of filtered voltage and current values and estimating a discharge size and a position in the input signal preprocessor, And four second electric field sensor sets disposed at positions symmetrical with the first electric field sensor set on the other side opposite to the one side face.

Wherein the first electric field sensor set comprises two electric field sensors symmetrically symmetrical about a first reference point located on one side of the measurement space and two electric field sensors symmetrical about the first reference point, The second electric field sensor set includes two electric field sensors symmetrically symmetrical about a second reference point at the same position as the first reference point on the other side of the measurement space and two electric field sensors symmetrical about the second reference point, Sensor.

Wherein the first electric field sensor set includes a first electric field sensor spaced apart from the first reference point on the X axis by a first reference point on one side of the measurement space, a second electric field sensor spaced apart from the first reference point by- A third electric field sensor spaced apart from the first reference point by y in the Y axis, and a 4a electric field sensor spaced apart from the first reference point by -y in the Y axis.

The second electric field sensor set includes a first b electric field sensor which is spaced apart from the other side of the measurement space by an x-axis at a second reference point at the same position as the first reference point, A third b electric field sensor spaced by y on the Y axis at the second reference point and a 4b electric field sensor spaced by y on the Y axis at the second reference point.

The distance between the first electric field sensor, the second electric field sensor, the third electric field sensor and the fourth electric field sensor may be the same with respect to the first reference point.

The distance between the first b electric field sensor, the second b electric field sensor, the third b electric field sensor, and the fourth b electric field sensor may be the same with respect to the second reference point.

And a data collecting and storing device for accumulating and storing the data on the discharge position and the discharge size estimated by the data processing and analyzing device according to the voltage value measured by the plurality of electric field sensors.

The discharge detecting device according to the present invention is characterized in that the discharge detecting device comprises a first electric field sensor set mounted on one side in a measuring space for detecting discharge and a second electric field sensor disposed on the other side of the second electric field sensor set, The position and the discharge size can be estimated in real time.

1 is a block diagram showing an electric discharge detecting apparatus according to an embodiment of the present invention.
FIG. 2 is a structural view showing an example of a measurement space in which the plurality of electric field sensors of FIG. 1 are arranged.
Fig. 3 is an enlarged view of one side of the measurement space of Fig. 2; Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, The present invention is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more faithful and complete, and will fully convey the scope of the invention to those skilled in the art.

In the following drawings, thickness and size of each layer are exaggerated for convenience and clarity of description, and the same reference numerals denote the same elements in the drawings. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

Although the terms first, second, etc. are used herein to describe various elements, components, regions, layers and / or portions, these members, components, regions, layers and / It is obvious that no. These terms are only used to distinguish one member, component, region, layer or section from another region, layer or section. Thus, a first member, component, region, layer or section described below may refer to a second member, component, region, layer or section without departing from the teachings of the present invention.

Referring to FIG. 1, a block diagram illustrating an electrical discharge detection device according to an embodiment of the present invention is shown.

1, the discharge detection apparatus 100 may include a plurality of electric field sensors 110, an input signal processor 120, a data processing and analysis device 130, and a data acquisition and storage device 140 have.

The plurality of electric field sensors 110 are mounted in a measurement space A for discharge detection. The plurality of electric field sensors 110 include four first electric field sensor sets 110a disposed on one side A1 of a measurement space A which is a substantially hexahedral space and four first electric field sensor sets 110a on the opposite side facing one side A1 And four second electric field sensor sets 110b disposed on the other side A2 at positions symmetrical to the first electric field sensor set 110a.

The first electric field sensor set 110a includes a first electric field sensor 111a spaced apart from the first reference point C1 on the first side A1 by x along the X axis, A third electric field sensor 113a spaced apart by y along the Y axis about the first reference point C1 and a third electric field sensor 113b spaced apart from the first reference point C1 by y, And a fourth electric field sensor 114a spaced apart by -y along the Y axis. That is, the first and second electric field sensors 111a and 112a are symmetrically symmetrical with respect to the first reference point C1, and the third electric field sensor 113a and the second electric field sensor 113b are symmetrical about the first reference point C1. The fourth electric field sensor 114a is vertically symmetrical. The distance between the first electric field sensor 111a, the second electric field sensor 112a, the third electric field sensor 113a and the fourth electric field sensor 114a may be the same with respect to the first reference point C1.

The second electric field sensor set 110b includes a first b electric field sensor 111b spaced apart from the second reference point C2 on the other side A2 by x in the X axis direction and a second electric field sensor 111b centered on the second reference point C2 A second b electric field sensor 112b spaced by -x on the X axis, a third b electric field sensor 113b spaced by y on the Y axis about the second reference point C2, And a 4b electric field sensor 114b spaced apart by -y on the Y axis. Also, the second reference point C2 may be regarded as being spaced apart from the first reference point C1 by z in the Z-axis direction. That is, the first b electric field sensor 111b and the second electric field sensor 112b are symmetrically symmetrical with respect to the second reference point C2, and the third b electric field sensor 113b and the second electric field sensor 113b are symmetrical about the second reference point C2. And the fourth electric field sensor 114b is vertically symmetrical. The distance from the first b electric field sensor 111b, the second b electric field sensor 112b, the third b electric field sensor 113b and the 4b electric field sensor 114b may be the same with respect to the second reference point C2.

The first electric field sensor 111a, the second electric field sensor 112a, the third electric field sensor 113a, the 4a electric field sensor 114a, the 1b electric field sensor 111b, the 2b electric field sensor 112b, The 3b electric field sensor 113b and the 4b electric field sensor 114b may be in the form of a capacitor and have two discs having a predetermined area and thickness arranged at regular intervals.

When the coordinates of the first reference point C1 are (0, 0, 0), the coordinates of the first electric field sensor 111a are (x, 0, 0) and the coordinates of the second electric field sensor 112a are the coordinate of the 3a electric field sensor 113a is (0, y, 0), and the coordinate of the 4a electric field sensor 114a is (0, -y, 0). In this case, the coordinates of the second reference point C1 are (0,0, z), the coordinates of the first b electric field sensor 111b are (x, 0,0) and the coordinates of the second b electric field sensor 112b are -x, 0, z), the coordinates of the 3b electric field sensor 113b are (0, y, z), and the coordinates of the 4b electric field sensor 114b are (0, -y, z).

Each of the four electric field sensors 111a, 112a, 113a and 114a included in the first electric field sensor set 110a can estimate a discharge size and a discharge generation position on a plane which is one side A1. Each of the four electric field sensors 111b, 112b, 113b, and 114b included in the second electric field sensor set 110b can estimate a discharge size and a discharge generation position on a plane that is the other side A2. Among the plurality of electric field sensors 110, the first electric field sensor set 110a and the second electric field sensor set 110b are symmetrical to each other for the discharge magnitude in the measurement space A and the discharge generation position estimation Position.

When the discharge charge amount generated at an arbitrary position in the measurement space A is Qd, the voltage value measured by the plurality of electric field sensors 110 can be expressed by Equation 1 below.

Here, Re is a distance from each electric field sensor to a discharge occurrence position, and Ve is a voltage value measured at each electric field sensor. That is, the voltage value measured at each of the plurality of electric field sensors 110 is proportional to the discharge charge amount Qd and inversely proportional to the distance from the discharge generation position. The voltage values measured by the plurality of electric field sensors 110 are transmitted to the input signal processor 120. Also, the input signal processor 120 filters the noise from the voltage values measured by the plurality of electric field sensors 110, and then transmits the filtered voltage and current values to the data processing and analyzing apparatus 130. Also, the data collection and storage device 140 stores the magnitude of the discharge charge amount according to the voltage value measured in each of the plurality of electric field sensors 110 in the form of a look-up table. That is, the data acquisition and storage device 140 accumulates and stores data on the discharge magnitude according to the voltage value measured in each of the plurality of electric field sensors 110.

The data processing and analysis apparatus 130 may estimate the magnitude of the discharge with respect to the voltage value measured at each electric field sensor 110 through the lookup data of the data collection and storage device 140.

Also, the data processing and analysis apparatus 130 can estimate the electric field position according to the magnitude of the voltage value measured by each of the plurality of electric field sensors 110. As can be seen from Equation (1), the voltage value is inversely proportional to the distance. Therefore, the discharge position can be estimated in accordance with the ratio of the voltage value between the electric field sensors at positions symmetrical to each other. For example, the ratio of the magnitudes of the voltage values measured by the first and second electric field sensors 111a and 111b, which are electric field sensors at symmetrical positions, and the distance from the discharge position to the first electric field sensor 111a And the ratio of the distance of the first b electric field sensor 111b from the discharge position. Also, the direction of the discharge position can be estimated according to the magnitude of the voltage measured in the first electric field sensor set 110a. For example, if the voltage measured by the first electric field sensor 111a in the first electric field sensor set 110a is the largest, it is estimated that there is a discharge position in the X-axis direction around the first reference point C1 . Through such a method, it is possible to estimate the discharge generation position according to the magnitude and ratio of the voltage value between the plurality of electric field sensors 110. The magnitude of the discharge charge amount may be calculated by applying the estimated discharge position to Equation (1).

 That is, the data processing and analysis apparatus 130 may receive the measured voltage from each of the plurality of electric field sensors 110, and estimate the magnitude and position of the discharge occurrence.

Also, the discharge charge amount Qd may vary in size with time due to transient phenomenon. Accordingly, in the plurality of electric field sensors 110, the displacement current Id corresponding to the variation amount of the discharge electric charge can be measured. The discharge charge amount due to such a change of time is expressed by Equation 2 below.

일 수 있다. 상기 시간의 변화에 따라, 각 복수의 전계 센서(110)에서 추정 가능한 변위 전류 값은 수학식 3과 같다. Where Rg is the distance from the moving point charge to the potential measurement point, and Re / v is the delay time. Where v is the moving speed of the charge

Lt; / RTI > The displacement current values that can be estimated by each of the plurality of electric field sensors 110 in accordance with the change of the time are expressed by Equation (3).

That is, the displacement current value is a value of the discharge charge amount with time variation. Since the changes of the discharge charge amount are different from each other depending on the positions of the plurality of electric field sensors 110, the time points at which the displacement current is generated are different from each other. Therefore, the magnitude and the position of the discharge can be estimated according to the phase change of the displacement current value.

The input signal processor 120 filters the noise of the voltage and current values measured by the plurality of electric field sensors 110 and transmits the filtered voltage and current values to the data processing and analyzing apparatus 130 .

The data processing and analyzing apparatus 130 compares and analyzes the inputted voltage and current values of the electric field sensor with the look-up table of the data acquisition and storage device 140, detects the phase difference from the current value, Is compared with the result obtained with the voltage values again, and finally, the discharge size and position can be detected. That is, the data processing and analysis apparatus 130 can detect the final discharge size and position by comparing the discharge size and position analyzed according to the current value with the estimated discharge size and position according to the voltage value.

The discharge size and discharge position estimated by the data processing and analysis apparatus 130 are transferred to the data collection and storage device 140. The data acquisition and storage device 140 stores information on a discharge size and a position according to a voltage measured in each of the plurality of electric field sensors 110. The information on the discharge size and the position stored in the data collection and storage device 140 may be checked at any time according to a user's request.

The present invention is not limited to the above-described embodiments, but may be modified in various ways within the spirit and scope of the present invention as set forth in the following claims. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

110; A plurality of electric field sensors
110a; A first electric field sensor set 110b; The second electric field sensor set
111a; A first electric field sensor 111b; The 1b electric field sensor
112a; A second electric field sensor 112b; 2b electric field sensor
113a; A third electric field sensor 113b; 3b electric field sensor
114a; A 4a electric field sensor 111b; 4b electric field sensor

Claims (7)

delete A plurality of electric field sensors disposed in a measurement space requiring discharge detection;
An input signal preprocessor for filtering the noise by receiving the measured voltage and the displacement current from the plurality of electric field sensors;
And a data processing and analysis apparatus for receiving a plurality of filtered voltage and current values from the input signal preprocessor and estimating a discharge size and a position,
The plurality of electric field sensors
And four second electric field sensor sets disposed at positions symmetrical with the first electric field sensor set on the other side opposite to the one side face, the four first electric field sensor sets being disposed on one side of the measurement space,
The data processing and analyzing device detects the discharge size and position by comparing the estimated discharge size and position with the plurality of voltages and the estimated discharge size and position according to the phase change of the displacement current,
Wherein the first electric field sensor set includes two electric field sensors symmetrically symmetrical about a first reference point located on one side of the measurement space and two electric field sensors symmetrical about the first reference point,
Wherein the second electric field sensor set includes two electric field sensors symmetrically symmetrical about a second reference point at the same position as the first reference point on the other side of the measurement space and two electric field sensors symmetrically disposed about the second reference point, And an electric field sensor. The method of claim 2,
The first electric field sensor set
A first electric field sensor spaced from the first reference point on one side of the measurement space by x in the X axis;
A second electric field sensor spaced apart from the first reference point by -x along the X axis;
A third electric field sensor spaced from the first reference point by y in the Y axis; And
And a fourth electric field sensor spaced apart from the first reference point by -y in the Y-axis direction. The method of claim 3,
The second electric field sensor set
A first b electric field sensor spaced apart from the other side of the measurement space by an x-axis at a second reference point at the same position as the first reference point;
A second b electric field sensor spaced apart from the second reference point by -x along the X axis;
A third b electric field sensor spaced from the second reference point by y in the Y axis; And
And a 4b electric field sensor which is spaced apart from the second reference point by -y in the Y-axis direction. The method of claim 3,
Wherein a distance between the first electric field sensor, the second electric field sensor, the third electric field sensor, and the fourth electric field sensor is the same as the distance from the first reference point. The method of claim 4,
Wherein the first b electric field sensor, the second b electric field sensor, the third b electric field sensor, and the fourth b electric field sensor are spaced apart from each other about the second reference point. The method of claim 2,
Further comprising a data collecting and storing device for accumulating and storing data on discharge position and discharge size estimated by the data processing and analyzing apparatus according to a voltage value measured by the plurality of electric field sensors, Detection device.

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