JPS6473260A - Insulation characteristic measuring apparatus for insulator - Google Patents

Insulation characteristic measuring apparatus for insulator

Info

Publication number
JPS6473260A
JPS6473260A JP22973687A JP22973687A JPS6473260A JP S6473260 A JPS6473260 A JP S6473260A JP 22973687 A JP22973687 A JP 22973687A JP 22973687 A JP22973687 A JP 22973687A JP S6473260 A JPS6473260 A JP S6473260A
Authority
JP
Japan
Prior art keywords
insulator
waveform
coefficient
voltage
waveforms
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP22973687A
Other languages
Japanese (ja)
Inventor
Yoshio Maruyama
Yasuhiro Yamashita
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to JP22973687A priority Critical patent/JPS6473260A/en
Publication of JPS6473260A publication Critical patent/JPS6473260A/en
Pending legal-status Critical Current

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  • Measurement Of Resistance Or Impedance (AREA)

Abstract

PURPOSE:To enable automatic measurement of a loss of an insulator at a high accuracy while permitting the learning of the state of insulation from the degree of distortion, by calculating a coefficient of mutual correlation between a voltage waveform applied to the insulator and a current waveform flowing therethrough. CONSTITUTION:An impedance 2 for voltage waveforms is connected in parallel to an AC power source 1 and an insulator 3 and an impedance 4 for measuring current waveforms are connected between a high voltage terminal of the AC power source 1 and the earth. Outputs of the impedances 2 and 4 are stored into a memory of a waveform memory 5 by one to several cycles through an A/D converter. An arithmetic device 6 calculates a mean of voltage waveforms and current waveforms to subtract it from a sample value data for each waveform and after the removal of a DC component, a self-covariance coefficient is calculated. Then, a mutual covariance coefficient is calculated and a self-covariance coefficient is normalized to calculate a mutual correlation coefficient. Then, a time difference between a voltage waveform and a current waveform is determined so as to give the mutual correlation coefficient the max. value thereby obtaining an insulating property of the insulator.
JP22973687A 1987-09-16 1987-09-16 Insulation characteristic measuring apparatus for insulator Pending JPS6473260A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22973687A JPS6473260A (en) 1987-09-16 1987-09-16 Insulation characteristic measuring apparatus for insulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22973687A JPS6473260A (en) 1987-09-16 1987-09-16 Insulation characteristic measuring apparatus for insulator

Publications (1)

Publication Number Publication Date
JPS6473260A true JPS6473260A (en) 1989-03-17

Family

ID=16896883

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22973687A Pending JPS6473260A (en) 1987-09-16 1987-09-16 Insulation characteristic measuring apparatus for insulator

Country Status (1)

Country Link
JP (1) JPS6473260A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108362947A (en) * 2018-01-31 2018-08-03 南京航空航天大学 Buck class straight convertor output capacitance loss tangent monitoring methods and system

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5770468A (en) * 1980-10-21 1982-04-30 Yokogawa Hewlett Packard Ltd Impedance measuring device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5770468A (en) * 1980-10-21 1982-04-30 Yokogawa Hewlett Packard Ltd Impedance measuring device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108362947A (en) * 2018-01-31 2018-08-03 南京航空航天大学 Buck class straight convertor output capacitance loss tangent monitoring methods and system
CN108362947B (en) * 2018-01-31 2020-08-07 南京航空航天大学 Method and system for monitoring loss tangent value of output capacitor of Buck-type direct-current converter

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