Synchronous machine monitoring and determination of a loss-of-field event using time stamped electrical and mechanical data

US10317467B2 · kind B2 · utility

Assignee

• Schweitzer Engineering Laboratories, Inc. · US

Inventors

• Nicholas C. Seeley · Pullman, US
• David J. Casebolt · Troy, US
• Gregary C. Zweigle · Pullman, US

Key dates

• Filing date: May 12, 2015
• Grant date: Jun 11, 2019
• Expiry date: Apr 25, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R31/34
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Electrical power machines are monitored and a loss-of-field event is determined thereof using time stamped mechanical conditions and electrical conditions. The mechanical conditions may include rotational position, calculated and time stamped rotational frequency, valve position, temperature, or vibration. The time stamped electrical conditions may include electrical power system frequency, electrical power machine field data, electrical power machine terminal information such as voltage and current, and the like. Electrical and mechanical time-stamped electrical power machine data from different machines that may be local or remote from each other may be compared for monitoring the machines.