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Power Quality: A Nonlinear Adaptive Filter for Improved Power System Operation and Protection

Power Systems. Power Quality: A Nonlinear Adaptive Filter for Improved Power System Operation and Protection. Research Overview: Focuses on the application of a new algorithm to improve power system operation Power quality issues of concern

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Power Quality: A Nonlinear Adaptive Filter for Improved Power System Operation and Protection

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  1. Power Systems Power Quality: A Nonlinear Adaptive Filter for Improved Power System Operation and Protection Research Overview: • Focuses on the application of a new algorithm to improve power system operation • Power quality issues of concern • Need for voltage amplitude, frequency and phase matching, to ensure proper integration • Need for real-time tracking of these parameters Nonlinear Filter Algorithm Summary: • Non-linear, adaptive • Capable of tracking amplitude, phase and frequency of a sinusoid in real time Work in Progress: Applications to renewable energy in the following applications: • Grid integration • Voltage Control • Frequency control • Sag Analysis • Active Filtering

  2. Power Systems Algorithm Sag Analysis • Matlab implementation • Capable of tracking amplitude A(t), phase and frequency of a sinusoid in real time Application to Sag Detection: • Faster response than current methods of Fourier, RMS and peak voltage • Suitable when mitigation is required

  3. Dips Classification using Wavelets • Background: • Most power quality standards consider only magnitude and duration when classifying dips, e.g., IEC-61000-4-11, NRS0482:2004 • Inadequate definition considering that certain drives are also sensitive to voltage changes • Some classification algorithms tested in South Africa resulted in a worst case accuracy of 50-80% • Research Objectives: • Devise a new classification algorithm using Wavelet Theory and Pattern Recognition Techniques

  4. Power Systems Impacts of Alternate Energy Sources on Power Systems Stability • Research Objectives: • Recommend appropriate models of wind and solar systems for reliability and security studies • Run computer simulations of wind and solar systems to access their impacts on power systems reliability and security • Validate simulations results using Real Time Power System Simulator (RTPS) • Model a small Eskom network (e.g., Western Cape) to assess the impact of these sources on the systems reliability and security using RTPS • Validate models with measurements

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