An Optimized Approach for Improving Current Sensing In Digital Wattmeters Using Rogowski Coils
Journal Title: American journal of Engineering Research - Year 2017, Vol 6, Issue 4
Abstract
A Rogowski-coil is a low cost, air cored and flexible induction sensor for non-intrusive condition monitoring and thus can be used for a variety of operations. Most digital wattmeter designs make use of current transformers and shunt resistors which have a lot of limitations like magnetic saturations, nonlinear reading at high currents and isolation issues. This research work systematically embodies a framework forthe improvement of digital wattmeter designs by integrating Rogowski coils with improved filtering circuits. This research goes ahead of analyse the linearity of the response of Rogowski coils when used as current sensors in metering devices and this linearity is effectively seen in the MATLAB graphs generated Also Rogowski-coil and its effect in metering design is evaluated through theoretical analysis, experiments and simulation while equally presenting an overview of Rogowski coil current sensing technology highlighting its basic principle of operation and its application in the rapidly evolving power system automation. The frequency characteristics and transient characteristics of Rogowski transducer and Rogowski-coil are deeply analysed. A real time simulation model that effectively characterizes the system is equally developed and as experimental testbed of evaluating the response of a Rogowski coil is equally carried out in this research. Finally, some measures are proposed for the performance improvement of Rogowski-coil to meet the requirements of metering applications.
Authors and Affiliations
Odigbo Abigail Chidimma,, Okoro Israel Chidi,, Ossai Victor
Keywords
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