Technical Presentations

WAPA COTP (California Oregon Transmission Project) Series Capacitor Bank Replacement866

Abstract
Throughout this case study, you will learn about the California Oregon Transmission Project (COTP) and its goal of replacing the existing fixed series capacitor banks (FSCBs) with new equipment.

Tag(s): capacitor bank, frequency dependent line, overvoltage, distribution substation

The new frequency dependent line and cable model: Wideband Model760

Abstract
<p>This presentation introduces the new Windband Model, capable of eliminates the modeling problems encountered with the existing ULM approach.</p><p>
Ov... see moreerview: - Time domain Solution o The Wideband (WB) Model coded in Fortran - WB Fitter o Executable, coded in MATLAB o Off line, Frequency Domain (FD) system identification - Implementation Notes with Theoretical Explanations o Follows the code with all necessary mathematical equations
</p>

The new frequency dependent line and cable model: wideband model739

Abstract
<h6 class="text-black" style="padding-bottom: 30px; padding-top: 30px; text-align: justify;">Speaker: <strong>Ilhan Kocar</strong... see more>, <em>Polytechnique Montréal</em></h6> <p class="text-black">The new WB model encapsulates many improvements including state-of-the-art research results. It eliminates the modeling problems encountered with the existing universal line model (ULM) approach.<br> In the new model, there is no limitation on the number of conductors. For symmetric coaxial cable systems with several cables, numerical problems are avoided by using the new cable correction function. The newly added DC correction scheme together with frequency band partitioning ensures high precision both at low frequencies and high frequencies. Frequency partitioning also improves the numerical conditioning of the system of equations. Unrealistic delays are avoided thanks to the new routines for the identification and adjustment of time delays. The delay adjustment is a search routine with boundaries for optimized fitting.<br><br> The state space formulation in time domain is reformulated using a precise discrete integration method. It minimizes the numerical integration and interpolation errors. This allows achieving stable simulations with larger time steps. The object oriented programming approach with vectorized variables and new memory allocation routines significantly improves the simulation speed and use of memory. The new initialization routines allow seamless transition from steady state solution into time domain simulations.</p></div>