Synchronized Wireless Measurement of High-Voltage Power System Frequency Using Mobile Embedded Systems

Journal Article · 17 August 2017 · IEEE Translations on Industrial Electronics

DOI:https://doi.org/10.1109/TIE.2017.2736509· OSTI ID:1474550

Yao, Wenxuan ^[1]; Lu, Haoyang ^[1]; Till, Micah J. ^[1]; Gao, Wei ^[1]; Liu, Yilu ^[1]

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1. Univ. of Tennessee, Knoxville, TN (United States)

This paper focuses on synchronized wireless measurement of high-voltage (HV) power system frequency using mobile embedded systems (MESs) integrated with a wireless electric field sensor (WEFS). Unlike traditional synchronized frequency measurement devices, which rely on potential transformers and current transformers physically connected to system elements, a WEFS is used to realize wireless signal acquisition in the vicinity of any HV apparatus. The MES performs real-time frequency estimation using a recursive discrete Fourier transform based algorithm. Network time protocol (NTP) is used for time synchronization, increasing the system flexibility by eliminating global positioning system reliance. An NTP-based synchronized sampling control method is proposed and implemented in MES to compensate the sampling time error caused by local time drift and division residue. The proposed system has the advantages of portability and lower cost, making it highly accessible and useful for a wide array of synchronized frequency measurement applications. Experiment results verify the accuracy and effectiveness of the proposed system.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1474550
• Journal Information: IEEE Translations on Industrial Electronics, Journal Name: IEEE Translations on Industrial Electronics Journal Issue: 3 Vol. 65; ISSN 0278-0046
• Publisher: IEEE
• Country of Publication: United States
• Language: English

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