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You're invited...

  • Seminar (FREE)
    Available Tools to Uncover Sub-Harmonics on Your Power System

As new and exciting sources of generation are brought online, the interconnected power system becomes ever more complex. Utilities are taking up the challenge, not only to monitor and protect against possible harmful frequencies, but to record and report that information as well, especially during system disturbances.

A deep knowledge of system interconnections is necessary to protect against possible transients that can result. A detailed view of system frequencies is extremely helpful to identify underlying patterns and predict potential for misoperation of the system. Especially at points of interconnection with the grid, it is also important to capture records that prove adherence to standards, and identify the sources of abnormalities after the fact.

S-PRO 4000 You will learn…
Sub-harmonics and hidden frequencies in the power system:

  • The concept of sub-harmonics
  • Effects of sub-harmonics
    • Induction generator effect
    • Torsional interactions
    • Toque amplification
  • Solutions for the effects of sub-harmonics

This half day session is available by request. Email us at

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  • Texas A&M
    Mar 26-29, 2018
    College Station, TX
    Visit us in booth #26!
    Hear our paper “Protection for Sub Synchronous Torsional Interaction (SSTI) Conditions Using an Industrial Sub-harmonic Relay”
    Texas A&M Website
    Apr 17-19, 2018
    Denver, CO
    See us in booth #1251!
    Receive 50% entry discount
    IEEE PES T&D Website
  • Expomin
    Apr 23-27, 2018
    Santiago, Chile
    Visit our booth!
    Expomin Website
    Apr 24-26, 2018
    Albuquerque, NM
    Visit our booth!
    See our presentation “Applicability of Synchrophasor Data for Fault Analysis: P/M Class Application”
    NASPI Website

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