Standard tests and requirements for rate-of-change of frequency (ROCOF) measurements in smart grids

Short Name: ROCOF, Project Number: 15NRM04
Large Power poles and wind turbines in autumn sunlight

Improved measurements of rate-of-change of frequency has provided vital support to the smart grids of the future

Improved measurements of rate-of-change of frequency will provide vital support to the smart grids of the future

The Renewable Energy Directive requires the EU to fulfil at least 20 % of its final energy consumption with renewable sources by 2020. Future electricity networks incorporating such a large proportion of renewable sources are subject to intermittent generation and require new instrumentation that can successfully balance supply and demand to prevent blackouts and poor power quality. Rate-of-change of frequency (ROCOF) is an essential measurement that such grid control systems depend upon to ensure the continuity and quality of electricity supply. However, ROCOF measurements are challenging, as they are highly susceptible to the disturbances experienced in typical electricity networks. Many measurement techniques have been proposed, yet despite the vital nature of this parameter, no appropriate standardisation for ROCOF testing exists. This project has built on the achievements in EMRP projects ENG04 SmartGrid and ENG52 SmartGrid II to review, develop and optimise algorithms to measure ROCOF over the full range of network conditions, and develop compliance test protocols, to support the development of a ROCOF standard.

Project website
Field Measurement of Frequency and ROCOF in the Presence of Phase Steps

IEEE Transactions on Instrumentation and Measurement

PMU-based power system analysis of a medium-voltage distribution grid

CIRED - Open Access Proceedings Journal

The Case for Redefinition of Frequency and ROCOF to Account for AC Power System Phase Steps

2017 IEEE International Workshop on Applied Measurements for Power Systems (AMPS)

Other Participants
University of Strathclyde (United Kingdom)