KR101801082B1 - Active partial discharge signal detection sensor with noise removal function - Google Patents

Active partial discharge signal detection sensor with noise removal function Download PDF

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Publication number
KR101801082B1
KR101801082B1 KR1020150104023A KR20150104023A KR101801082B1 KR 101801082 B1 KR101801082 B1 KR 101801082B1 KR 1020150104023 A KR1020150104023 A KR 1020150104023A KR 20150104023 A KR20150104023 A KR 20150104023A KR 101801082 B1 KR101801082 B1 KR 101801082B1
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KR
South Korea
Prior art keywords
partial discharge
variable
set value
noise
variable amplification
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KR1020150104023A
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Korean (ko)
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KR20150115691A (en
Inventor
최광식
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(주) 에코투모로우코리아
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Priority to KR1020150104023A priority Critical patent/KR101801082B1/en
Publication of KR20150115691A publication Critical patent/KR20150115691A/en
Priority to PCT/KR2016/008092 priority patent/WO2017014607A1/en
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Publication of KR101801082B1 publication Critical patent/KR101801082B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/08—Measuring electromagnetic field characteristics
    • G01R29/0864—Measuring electromagnetic field characteristics characterised by constructional or functional features
    • G01R29/0892—Details related to signal analysis or treatment; presenting results, e.g. displays; measuring specific signal features other than field strength, e.g. polarisation, field modes, phase, envelope, maximum value
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Testing Relating To Insulation (AREA)

Abstract

The present invention relates to a hardware-based partial discharge noise elimination device for eliminating noise by comparing output values of two directional antennas. It effectively removes noise without using a conventional external noise antenna and noise elimination algorithm software, Which is applicable to IoT sensors for partial discharge large data acquisition.

Description

TECHNICAL FIELD [0001] The present invention relates to an active partial discharge signal detection sensor having a noise removing function,

The present invention relates to a partial discharge detection sensor device having a hardware-based noise canceling function, and more particularly, to a partial discharge sensor for distinguishing and excluding an external noise component which hinders the accuracy of partial discharge electromagnetic wave measurement in addition to an electromagnetic wave signal generated when a partial discharge is generated ,

More particularly, the present invention relates to a method and apparatus for estimating an output response characteristic of a wireless communication system, in which two directional antennas in which output response characteristics are grasped in advance are placed close to each other to maximize the uniformity of electromagnetic wave reception conditions, The present invention relates to an IoT sensor device for an active type partial discharge detection, which compares an output response value difference to distinguish noise generated from the outside of a diagnosis object and a partial discharge signal generated internally to remove noises and output a partial discharge signal.

In the conventional partial discharge diagnosis apparatus, two different kinds of antennas are installed separately. That is, an external noise sensor was used to remove an external noise sensor having an omni-directional appearance and a partial discharge sensor to open the opening of one side of the metal housing to the diagnostic target facility. However, as a result of the application in actual field, it has been difficult to apply to the actual field such that the connection between the two antennas does not work well due to the problem of the contact failure of the external noise antenna connector and the disconnection of the coaxial cable line. In addition, the noise reduction method of the noise gating method due to the increase of the broadband mobile noise has an adverse effect of partially removing the partial discharge signal. In addition, measures against an external noise source similar to a partial discharge, such as a corona discharge in the air, a plasma welding machine, etc.,

On the other hand, the noise removal method using the difference of the logarithmic reaction speed has a disadvantage that the mobile signal cancellation function and the corona signal distinguishing function are good, but the direction can not be distinguished from the outside and the inside of the electromagnetic wave. When the external noise similar to the partial discharge signal occurs, there is a limit to the noise reduction.

Therefore, although it is not possible to acquire the partial discharge big data due to the technical difficulties as described above, it is necessary to provide an economical yet highly reliable sensor according to the request of the time.

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus and method for detecting a partial discharge by using an external noise sensor and an expensive noise elimination algorithm software in order to distinguish the received electromagnetic wave signal from the external and internal parts, The present invention provides an active type partial discharge sensor device having a function of passing an internal partial discharge signal, that is, a hardware-based external noise removing function. More specifically, even if antenna characteristics are the same or antenna characteristics are different from each other in the sensor device, two directional antennas, which grasp their characteristics in advance, are arranged or arranged in close proximity to each other, The directional antenna receives the inward and outward electromagnetic waves with different angles from each other and computes by using an arithmetic expression or an arithmetic expression obtained through calibration obtained from the previously obtained directional antenna output response characteristic values, As a result, the external noise component is canceled out, so that an IoT sensor device for cost-effective and highly reliable hardware-based partial discharge detection that does not require an external noise sensor and noise elimination algorithm software is provided and further reliable partial discharge large data acquisition It is in Keham.

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Among the embodiments, an active partial discharge signal detection sensor device having a noise canceling function is configured to receive electromagnetic waves and to arrange electromagnetic waves in a direction opposite to each other while grasping the proportional output response characteristics between the front and rear portions thereof Amplifying or sub-amplifying the output responses of the two directional antennas, respectively, and each of the two directional antennas is connected to the two directional antennas, The sub-amplification includes two variable amplifiers that can be set through external control or manual setting, an operation unit that receives an output response output from the two variable amplifiers and executes an equation obtained through calibration, Or a setting value received by manual setting, It may include two setting devices provide for the effort to offset the electromagnetic wave noise.
The two set value providing devices may be connected to the two variable amplifiers.
A first terminal connected to the operation unit, a second terminal connected to the first variable amplification unit of the two variable amplification units via the first set value provision unit, And an input / output response terminal connected to a third terminal connected to the two variable amplification part.
The input / output response terminal may be an S / N or N type analog connector having an impedance of 50 Ohm.
Each of the PCBs may further include two PCBs installed inside the enclosure and having a shielding structure to prevent disturbance by external electromagnetic waves.
The first PCB of the two PCBs includes the two variable amplifiers, and the second PCB of the two PCBs may include the operation unit.

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According to the present invention, although not limited thereto, the partial discharging of equipment such as railway equipment, water distribution equipment, GIS, MTR, distribution transformer, ESS equipment, electric car charger, electric vehicle power train, In the abnormal signal electromagnetic wave detection, disturbance such as external electromagnetic noise, that is, the air corona or a mobile signal can be removed, the conventional external noise sensor is not required, and a large portion Because it is a hardware-based noise cancellation method, it can reduce the software cost of the downstream, and it is possible to manufacture economical and highly reliable large data and IOT partial discharge abnormal signal detection sensor.

1 is a circuit block diagram of an apparatus according to the present invention.
2 is an example of the production of the device according to the present invention.
Fig. 3 is an internal structure of a production example of the device according to the present invention.

In the present invention, in implementing the external noise canceling function, which is one of the highest issues of the partial discharge diagnosis, the output response difference according to the difference in the direction of electromagnetic wave reception between the directional antennas having the same characteristics or mutually non- Is an IoT sensor device for an active type partial discharge detection capable of more accurate partial discharge diagnosis since an electromagnetic wave component in a direction of an object to be diagnosed is passed through to the next step.

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

1 is a diagram showing a configuration of a noise removing apparatus of an IoT sensor for detecting a partial discharge according to the present invention.

As shown in FIG. 1, the partial discharge noise removing apparatus according to the present invention includes a first antenna 101 and a second antenna 102. Although the antennas 101 and 102 are firstly microstrip antennas having the same characteristics over all directions, antennas having the same characteristics can be applied in some cases.

The antennas 101 and 102 are characterized by being a wideband UHF directional antenna having a front part and a rear part mutually proportional. In the case of a microstrip antenna, depending on the product, the reception power response of the rear part is about 33% as compared with the front part.

For example, the antennas 101 and 102 may be disposed as close as possible to each other by using an apparatus such as a partition wall in the same enclosure so as not to interfere with each other. The directivity directions of the antennas 101 and 102 are opposite to each other , The error of each electromagnetic wave reception is minimized, but the reliability of the output response according to the difference in direction is maximized.

The output response of the first antenna 101 is input to one end of the operation unit 105 via the first variable amplification unit 103 and the output response of the second antenna 102 is input to the operation unit 105 via the second variable amplification unit 104. [ (105).

The variable amplification units 103 and 104 first apply the variable attenuator of 0 dB or less including 0 dB unamplified or a variable amplifier of 0 dB or more according to the externally set value, but do not limit it.

The reason why each variable amplifier is connected to each antenna is to set the propagation speed and phase to be the same condition, and one is required to attenuate and the other to amplify when the intensity of the signal is great.

The set value of the first variable amplifier 103 is supplied from the first set value providing device 107. [ At this time, the set value is received from the outside via the second terminal 109 remotely, or in other cases, arbitrary manual setting is possible.

The setting value of the second variable amplification unit 104 is similarly supplied from the second setting value providing device 108 and the setting value is received remotely from the outside via the third terminal 110, Allow any manual setting to be made.

When receiving the setting values remotely by the setting value providing devices 107 and 108, the setting value providing devices 107 and 108 may be semiconductor devices such as a shift register and a latch, and the transmission method may be asynchronous serial data Method can be applied.

In the case of arbitrary manual setting of the variable amplifier setting value providing device 107, 108, it can be replaced by a passive element such as a dip switch or a variable resistor or a fixed resistor.

The operation unit 105 may apply active elements such as Difference Amplifier, Substance, Differential Amplifier, and Operational Amplifier as application examples. The operation unit 105 performs an arithmetic operation on the input values, and outputs the resultant values through the first terminal 106 To the next stage device.

The input / output response terminal 111 applies an S / N or N-type analog connector having an impedance of 50 Ohm and applies the operation power and the low speed serial data at the same time.

The input / output response terminal 111 is connected to the first terminal 106, the second terminal 109 and the third terminal 110 in the apparatus. However, in the case of power supply, the voltage drop is compensated by a regulator It is possible.

Any one or all of the variable amplification units 103 and 104 may be replaced with a fixed value amplification unit whose amplification is preset in some cases.

Any or all of the variable amplifier setting value provision devices 107 and 108 may be automatically set remotely by the automatic calibration function of the external device, although it is not shown.

A method of remote automatic setting by automatic calibration is a method of mounting the apparatus of the present invention in a structure similar to a facility to be diagnosed and radiating an electromagnetic wave of a certain frequency within the facility to be diagnosed, And the external calibration device (not shown) analyzes the frequency of the output response of the apparatus of the present invention to determine a point at which the external frequency is extinguished and the internal frequency becomes maximum, It is a method to find and set it in cooperation with each other.

The arithmetic operation unit 105 need not necessarily be an active element in order to achieve the purpose of the arithmetic operation. And may be at least one of direct coupling, passive element or active element, a combination of two or more elements, or a multistage element of two or more stages.

The operation unit 105 may be replaced with an analog-to-digital conversion apparatus having a not-shown log amp and a peak hold or sample-and-hold circuit. In this case, a control unit such as a DSP, FPGA, In this case, the control unit can control the variable amplification unit set value provision device 107 and 108, and can set a data value such as PRPD / PRPS according to an internal firmware function or according to an external control, (106). In this case, the input / output terminal 111 can replace one of the Ethernet, CAN, LIN, and Toslink optical terminals as the data layer and the physical layer. However, the input / output terminal 111 is not limited thereto. , And power for serial digital data communication ports.

In this case, the output of the variable amplification units 103 and 104 can be directly transmitted to the external device in the next stage. In this case, the input / output terminal 111 It is replaced with a high-frequency analog connector such as two SMA type or N type.

2 is an example of the production of the device according to the present invention.

As illustrated in FIG. 2, the first antenna 101 and the second antenna 102 are installed in the same enclosure 100 in a diagonal direction to avoid interference with each other and to maintain homogeneity of radio wave reception.

The first antenna 101 and the second antenna 102 are installed in a structure in which the front part and the rear part are both opened, and can receive radio waves in both directions at the same time as the special part and the rear part.

The enclosure 100 may be a metal material capable of shielding electromagnetic waves or an engineering plastic material having ferrite coating therein.

Fig. 3 is an internal structure of a production example of the device according to the present invention.

As illustrated in FIG. 3, the first PCB 112 and the second PCB 113 are installed inside the enclosure and are normally shielded to prevent disturbance by external electromagnetic waves.

On the first PCB 112, a first variable amplification unit 103, a second variable amplification unit 104, a first variable amplification unit set value provision unit 107 and a second variable amplification unit set value provision unit 107 A second terminal 109, and a third terminal 110. The second terminal 109 and the third terminal 110 are connected to each other.

The coupling portion of the calculation unit 105 and the input / output terminal 111 may be formed on the second PCB 113.

The above-mentioned components that can replace the operation unit described above can also be configured on the second PCB 113.

The input / output terminal 111 is provided on the side of the housing and transmits / receives a power source, a low-speed serial data communication signal, and a UHF band microwave signal.

If the arithmetic unit is replaced with a digital processing device as described above, the input / output terminal 111 can be replaced correspondingly.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. .

The present invention can economically and effectively remove external noise without installing a separate external noise antenna, thereby preventing a malfunction of the partial discharge detection and improving the accuracy of the partial discharge diagnosis. Therefore, not only the use of the ultra-active filter of a sensor for partial discharge diagnosis in the field related to electric power generation and transmission, but also the partial discharge detection sensor for ESS equipment, the electric discharge detection sensor for electric vehicle and the partial discharge And can be applied to a detection signal of a partial discharge signal for big data and object Internet (IoT) because it can remove malfunctions and false alarms due to external noises, And can be applied to a front end apparatus of a high-resolution partial discharge diagnosis apparatus in the future.

100: enclosure
101: first antenna 102: second antenna
103: first variable amplification part 104: second variable amplification part
105: operation unit 106: first terminal
107: First Variable Amplifier Setting Value Providing Apparatus
108: Second Variable Amplifier Setting Value Providing Device
109: second terminal 110: third terminal
111: input / output response terminal 112: first PCB
113: Second PCB

Claims (7)

Two directional antennas that receive electromagnetic waves and are separated from each other by a partition wall in the same enclosure that can arrange electromagnetic waves in a direction opposite to each other while grasping the proportional output response characteristics of the front and rear portions;
Amplifying or sub-amplifying the output responses of the two directional antennas, respectively, and each of the two directional antennas being connected to the two directional antennas, Variable amplification units;
An operation unit receiving an output response output from the two variable amplification units and executing an equation obtained through calibration; And
Wherein each of the plurality of set value providing devices includes a set value providing device for receiving a set value received from a remote or manual setting from the outside and for canceling outward electromagnetic noise of the operated part.
delete The apparatus according to claim 1, wherein the two set value providing devices
Wherein the first and second variable amplifying units are connected to the two variable amplifying units, respectively.
The method according to claim 1,
A first terminal connected to the operation unit, a second terminal connected to the first variable amplification unit of the two variable amplification units via the first set value provision unit, And an input / output response terminal connected to a third terminal connected to the second variable amplification unit.
5. The apparatus of claim 4, wherein the input /
Wherein the SMA type or N type analogue high frequency analog connector having an impedance of 50 Ohm is applied to the active part discharge signal detecting sensor device.
The method according to claim 1,
Wherein each of the plurality of PCBs further includes two PCBs disposed inside the enclosure and shielded to prevent disturbance due to external electromagnetic waves.
The method according to claim 6,
Wherein the first PCB of the two PCBs includes the two variable amplifiers, and the second PCB of the two PCBs includes the operation unit. The active partial discharge signal detection Sensor device.
KR1020150104023A 2015-07-23 2015-07-23 Active partial discharge signal detection sensor with noise removal function KR101801082B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020150104023A KR101801082B1 (en) 2015-07-23 2015-07-23 Active partial discharge signal detection sensor with noise removal function
PCT/KR2016/008092 WO2017014607A1 (en) 2015-07-23 2016-07-25 Big data iot partial discharge detecting sensor having hardware-based noise removal function

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Application Number Priority Date Filing Date Title
KR1020150104023A KR101801082B1 (en) 2015-07-23 2015-07-23 Active partial discharge signal detection sensor with noise removal function

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KR20150115691A KR20150115691A (en) 2015-10-14
KR101801082B1 true KR101801082B1 (en) 2017-11-27

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101899010B1 (en) * 2016-11-24 2018-09-14 (주) 에코투모로우코리아 Partial discharge diagnose apparatus and method based on time-pulse relation analysys

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010032450A (en) * 2008-07-31 2010-02-12 Meidensha Corp Method of determining presence or absence of partial discharge electromagnetic wave from object electric apparatus
US20150160282A1 (en) * 2012-06-14 2015-06-11 Roberto Candela A partial discharge detection apparatus and method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100590208B1 (en) * 2004-03-08 2006-06-19 (주) 피에스디테크 Portion discharge detection antenna
KR100923748B1 (en) * 2006-07-04 2009-10-27 주식회사 효성 Partial discharge detector of gas-insulated apparatus
JP2008286715A (en) * 2007-05-21 2008-11-27 Mitsubishi Electric Corp Instrument for measuring partial discharge

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010032450A (en) * 2008-07-31 2010-02-12 Meidensha Corp Method of determining presence or absence of partial discharge electromagnetic wave from object electric apparatus
US20150160282A1 (en) * 2012-06-14 2015-06-11 Roberto Candela A partial discharge detection apparatus and method

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KR20150115691A (en) 2015-10-14

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