Voltage measurement device, voltage measurement method, and storage medium

US11703529B2 · kind B2 · utility

Assignees

• Digital Grid Research Institute, China So Po Grid · CN
• Electric Pwr Rrch Ins of Guangxi Pwr Grd Co., Ltd. · CN

Inventors

• Peng Li · 流花街道, CN
• Bing Tian · San Jose, US
• Ke Zhou · Nanhu, CN
• Zhiming Wang · Sichuan, CN
• Bofeng Luo · 流花街道, CN
• Xu Yin · Beijing, CN
• Jiaming Zhang · New York, US
• Zhong Liu · 流花街道, CN
• Xiaoming Wang · Sunnyvale, US
• Hongdi SUN · 流花街道, CN
• Qiancheng Lv · 流花街道, CN
• Renze Chen · 流花街道, CN
• Licheng Li · 安丰镇, CN

Key dates

• Filing date: Aug 9, 2022
• Grant date: Jul 18, 2023
• Expiry date: Aug 9, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R19/0084
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A voltage measurement device includes a probe module movably arranged around an alternating-current transmission line, and a measurement unit. A metal electrode is arranged on a surface of the probe module facing toward the alternating-current transmission line, electrically coupled with the alternating-current transmission line to form a coupling capacitor, and then forms an electrical circuit with an inductor element, a resistor element, and a reference signal source in the measurement unit. A processor controls the reference signal source to input reference voltage signals at different frequencies to the electrical circuit, determines a resonant frequency of the electrical circuit according to currents of the electrical circuit under the reference voltage signals at different frequencies, and determines a voltage of the alternating-current transmission line according to a first current component amplitude and the resonant frequency of the electrical circuit. A voltage measurement method and a storage medium are also disclosed.