ROCOF instrumentation: specifying the architecture of a compliant instrument

Provide clarity to the system-requirements for a rate-of-change-of-frequency (ROCOF) measurement instrument such that it can be specified in the ROCOF-standard to achieve a given class of accuracy.

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Coordinator: Paul Wright

 

Another aim of this project is to clarify the system-requirements for a rate-of-change-of-frequency (ROCOF) measurement instrument such that it can be specified in the ROCOF-standard to achieve a given class of accuracy. 

A ROCOF measurement instrument is a complex device consisting of transducers, filters, data convertors, GPS timing, digital-filters and digital signal processing.  The amplitude and phase response of each component in this measurement chain has its own accuracy-sensitivity-factor for a given algorithm. This imperfect measurement chain gives rise to cumulative errors in the ROCOF measurement which vary according to the input waveform that is selected.   

In order to manufacture a compliant instrument capable of measuring with a desired accuracy under all relevant waveform conditions, it is necessary to determine the component accuracy-sensitivities, such that accuracy limits for each component of the measurement chain can be specified. 

Having defined a reference architecture, Monte-Carlo simulation are used to determine the sensitivity-factors of the measurement-chain components for the given algorithms and waveform stimulus. Worst-case errors for each component, leading to minimum specifications, can then be determined such that manufacturers are able to design compliant instruments. 

The simulation models developed are modified to include imperfections in the measurement chain in order to reconcile the measurement chain accuracy limits with overall ROCOF accuracy simulations. 

 

For more information, see  the project webpage >> 

 

Parent project
Short Name:ROCOF,Project Number:15NRM04

Participating Euramet NMIs and DIs

CMI (Czechia)

NPL (United Kingdom)

VSL (Netherlands)

Other participants

University of Strathclyde (United Kingdom)

Information
Type
EMPIR
Field
Normative
Project type
Joint Research Project
Status
completed
Call
2015
Duration
2016 - 2019