Validation of power system transient stability results

Abstract

Simulation of the transient stability problem of a power system, which is the assessment of the short term angular and voltage stability of the system following a disturbance, is of vital importance. It is widely known in the industry that different transient stability packages can give substantially different results for the same (or at least similar) system models. The goal of this work is to develop validation methodologies for different transient stability software packages with a focus on Western Electricity Coordinating Council (WECC) system models. We discuss two specific approaches developed and implemented to validate the transient stability results. The sources of discrepancies seen in the results from different packages are investigated. This enables us to identify the differences in the implementation of dynamic models in different transient stability softwares. In this process, we present certain key analyses of the WECC system models for different contingencies.iii Dedicated with loving memory to my father, Sudhir L. Shetye (1949-2011 iv

Transient model verification of wind turbines

“…However, due to a lack of real-world data for these specific simulations and transient stability analysis results in general, we adopt the methodology used in [1] to provide verification of model implementations. That is, we will simulate a faulted bus condition at the location of the WTGs using a single machine infinite bus (SMIB) using three widely-used transient stability software packages and validate their results against one another.…”

Systematic Determination of Discrepancies Across Transient Stability Software Packages

“…In contrast, the authors' prior work in [12] and [13] presented simulation comparisons of industry-grade software packages, with the use of actual power system cases at the interconnect level. While the focus was on the most common dynamic models in planning cases, a compelling case was made with the help of visual comparisons of time-domain transient stability plots.…”