Technical Presentations

Traveling-wave Fault Locator Model Development Using EMTP854

Abstract
This presentation briefly discusses the development of a computer model of a traveling-wave based fault locator using EMTP, as well as simulation results using the developed model. Specifically, the b... see morelock discussed in this presentation is based on the double-ended method of fault location. Traveling wave extraction from raw waveforms and the time-of-arrival estimation using appropriate signal processing techniques are also briefly discussed. Simulation results using the fault locator model in a transmission system model are shown, and comparison of results with the fault locator of an actual traveling-wave relay are presented as well.

Tag(s): traveling wave, protection, fault location, comtrade

HVDC grid protection algorithm based on fault parameter estimation786

Abstract
This presentation focuses on voltage and current sensors modelling and its application on a transient based protection algorithm within a 4-terminal HVDC grid simulated in EMTP.

Fully selec... see moretive protection strategies for meshed HVDC grids need very fast DC fault identification and isolation which constitutes one of the main locks for large deployment of such grids. Transient based fault identification algorithms based on the modelling of the voltage and current traveling waves are seen as a promising solution to achieve fast fault identification. In addition, such algorithms are able to estimate the fault parameters such as the fault distance using local sensor data.As a model based approach, the accuracy of the sensors may impact the fault identification results as well as the precision of the estimated fault parameters.

In depth sensitivity analysis for different parameters of the sensor are carried out to outline the influence of the sensor characteristics on the fault identification results as well as the accuracy on the estimated fault parameters.

Methods of Generating COMTRADE Files Using EMTP784

Abstract
This presentation provides two different methods of generating COMTRADE files to playback through the SEL-T400L traveling wave relays using EMTP software. The first method of generating the COMTRADE f... see moreiles uses the standard export feature in ScopeView. The second method utilizes a beta version of the COMTRADE recorder meter block to generate the .CFG files, which are later converted to .PLY files to be played back on the T400L. The advantages and disadvantages for each method are discussed along with demonstration results.

EMT models to evaluate traveling wave based protection in distribution system767

Abstract
This presentation will discuss the need for using wide-band models to model the traveling wave phenomenon in the distribution system. The distribution system is going through significant changes. On... see moree of them is the high penetration of inverter-based distributed energy resources in the distribution system. Due to this high penetration, there is a need for a better protection system. Multiple organizations are working on creating novel protection techniques for distribution systems with high penetration of inverter-based DERs. One such innovative method is the use of traveling waves to detect and locate faults. Transmission system protection utilizes this approach, and commercial solutions exist for the transmission system. Using this approach in the distribution system is not straightforward and presents some challenges for implementation.

Methods of Generating COMTRADE Files Using EMTP for Testing SEL-T400L Traveling Wave Relays757

Abstract
This presentation provides two different methods of generating COMTRADE files to playback through the SEL-T400L traveling wave relays using EMTP software. The first method of generating the COMTRADE f... see moreiles uses the standard export feature in ScopeView. The second method utilizes a beta version of the COMTRADE recorder meter block to generate the .CFG files, which are later converted to .PLY files to be played back on the T400L. The advantages and disadvantages for each method are discussed along with demonstration results. Author: Toby Russell, Dr. Prashanna Bhattarai, Dr. Milton Quinteros Company: Entergy