Technical Presentations

EMTP Development Roadmap: PSS/E Import Tool in EMTP 4.2830

Abstract
1. Custom device usage
- New option which allows to import a user-defined device
- Scripts may be called to process the parameters of the RAW, SEQ and DYR files
- The user customer devi... see moreces file section provides the interface

2. Import only specific part of a grid
- This new option allows user to import only specific parts of the RAW file
- PSS/E is required to use this option

Tag(s): EMT simulation, PSSE, grid, import tool

Modeling and evaluation of overvoltage792

Abstract
A case study will be presented demonstrating modeling of overvoltage in a moderately sized system involving medium voltage vacuum breakers, cables and transformers. The focus is on simulating high fre... see morequency overvoltage generated by circuit breaker prestrikes and re-ignitions and evaluating the impacts on transformer insulation.
-Results obtained from a customized breaker TRV model which is capable of controlling the capability of switching high frequency current will be presented.
-The methodology of analyzing severity of overvoltage in the frequency domain was applied in this project. Results and discussions regarding frequency domain analysis will be shared.
-Simulation results regarding typical system configurations with variation of key parameters such as cable lengths, load power factors will be briefly presented.
-Application of EMTP study results in assisting equipment specification, as well as overvoltage mitigation methods including optimizing switching sequences, necessity of snubber circuits will be discussed.
-Case specific strategies to improve simulation speed and work flow with EMTP will be introduced and discussed.

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.

Synchronous condenser transformer energization with PAMSUITE781

Abstract
In engineering studies, getting the necessary input data for performing EMTP simulations may be one of the most challenging tasks.
Indeed, the characteristics of the system under study are usual... see morely badly known for a number of reasons: sometimes they are known with some inaccuracy.
For example when parameters are associated with tolerances; sometimes, the characteristics are completely unknown, for example when the equipment is very old and the datasheets are not available, or when the study is about a future project for which many equipment characteristics are not known yet.

Safe Operation of DFIG based Wind Parks in Series Compensated Systems762

Abstract
<p>This presentation will demonstrate the impact of WP operating conditions and DFIG control system parameters on SSCI.</p><p>
Overview: - SSCI Phenomeno... see moren in Series compensated DFIG-based wind Parks - SSCI Problem Identification - Impact of DFIG control system parameters on SSCI - SSCI Mitigation - Future Research
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