Title:
METHOD FOR ACCURATELY MEASURING HARMONIC VOLTAGE OF CAPACITOR VOLTAGE TRANSFORMER BY MEANS OF INTERPOLATION
Document Type and Number:
WIPO Patent Application WO/2019/174462
Kind Code:
A1
Abstract:
A method for accurately measuring the harmonic voltage of a capacitor voltage transformer (CVT) by means of interpolation. In the method, by means of curve fitting, a mathematical interpolation calculation equation under the condition of different parameter combinations is obtained in an off-line state, then, for a specific CVT device, a nameplate parameter (an actual parameter) thereof is input to a harmonic correction device by means of man-machine dialogue, and a network transfer function for an arbitrary parameter at room temperature is obtained by means of the mathematical interpolation calculation equation, i.e., obtaining an amplitude-frequency curve and a phase-frequency curve of the CVT for a specific parameter at room temperature; then, according to the operation environment temperature of the CVT measured by a temperature sensor, correction curves of the amplitude-frequency curve and phase-frequency curve of the CVT which change with temperature is obtained by means of offline calculation of the equivalent circuit parameter offset caused by a temperature change. Thus, accurate correction measurement of the harmonic content of the CVT is achieved.
Inventors:
XUE FENG (CN)
XIE WEILUN (CN)
XIE PEICHENG (CN)
XIE JIANRONG (CN)
HUANG ZHIWEI (CN)
CHEN XINHUI (CN)
XU JIAFENG (CN)
WU JIETING (CN)
LI SHIHENG (CN)
LIU XIAOPEI (CN)
XIE WEILUN (CN)
XIE PEICHENG (CN)
XIE JIANRONG (CN)
HUANG ZHIWEI (CN)
CHEN XINHUI (CN)
XU JIAFENG (CN)
WU JIETING (CN)
LI SHIHENG (CN)
LIU XIAOPEI (CN)
Application Number:
PCT/CN2019/076393
Publication Date:
September 19, 2019
Filing Date:
February 28, 2019
Export Citation:
Assignee:
DONGGUAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CO LTD (CN)
International Classes:
G01R35/02; G01R23/16
Foreign References:
| CN108535679A | 2018-09-14 | |||
| CN105388444A | 2016-03-09 | |||
| CN104502880A | 2015-04-08 | |||
| CN204142946U | 2015-02-04 | |||
| CN107561476A | 2018-01-09 |
Attorney, Agent or Firm:
YOGO PATENT & TRADEMARK AGENCY LIMITED COMPANY (CN)
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