## Applying Multiple Faults Simultaneously in Transient Stability

A common question that PowerWorld support staff receives is as follows. Question: Can I apply multiple faults in a transient stability simulation simultaneously? Answer: Yes, absolutely! We agree that normally this would not happen in real life situations, however there are studies that power engineers do that may require this. Our customers in North American […]

Tags: How-to,Simulator,Tip,Transient Stability

January 8, 2021

## Synchronous Machine Theory: New GENQEC Model

PowerWorld Director of Software Development gave a presentation at the WECC MVWG meeting in Salt Lake City on November 21, 2019. This presentations gives a very detailed theoretical look at where the synchronous machine numerical model comes from. Synchronous Machines Theory The presentation was given to provide background on where the need for a new […]

Tags: FAQ,Presentation,Product,Simulator,Transient Stability

November 20, 2019

## Improved Synchronous Machine Model GENTPW

Presentation on GENTPW Model White Paper on GENTPW Model PowerWorld Corporation has developed a new synchronous machine model named GENTPW. This model has been implemented in PowerWorld Simulator Version 20 and is available now. This model extends enhancements made in the GENTPF/GENTPJ which more accurately represents the effect of saturation on the machine during steady […]

Tags: Presentation,Simulator,Technical Papers,Transient Stability

October 24, 2018

## GIC Time Varying Electric Field Example

PowerWorld Simulator supports binary and text file formats for time and spatially-varying geomagnetic disturbance (GMD) surface electric field inputs. This format allows development of detailed solar storm scenarios based on historic events or 3D earth conductivity models. Sample (B3D binary format) based on June 22, 2015 event [1], over footprint of the U.S. State of […]

Tags: GIC,How-to,Simulator,Transient Stability,Video

October 15, 2018

## Play-in time series measurement data with PlayInGen model for Power Plant Model Validation (PPMV)

PlayIn models can be found in the Transient Stability add-on of Simulator. Many dynamic models comprise of differential-algebraic equations that respond to perturbations in a simulation. In contrast, these PlayIn models are used to input time-series data into a transient run at specified time points. In Simulator, a PlayIn Configuration object can be used to store […]

Tags: Cases,How-to,Presentation,Script,Transient Stability,Tutorial,Video

February 8, 2017

## Adding Voltage Compensation to a Generator Model

Generator Voltage Compensation The input signal to Exciter models is a voltage signal (often labeled as either Vc or Ec on a block diagram). In the simplest form this is just the per unit voltage magnitude of the terminal bus of the generator. However, sometimes instead of using that voltage signal directly, the voltage is compensated by attempting to control […]

Tags: How-to,Simulator,Transient Stability,Tutorial

October 19, 2016

## Coordinated Initialization of the Load Distribution Equivalent, Load Characteristic, and Load Distributed Generation Models

Generator modeling in transient stability simulation software has been modularized for decades. Generators are modeled using a Machine Model, Exciter, Governor, Stabilizer, etc. Several new modules for generators have been added in the past few years specifically for wind turbine and renewable energy modeling. Load models however had remained stuck with only 2 models: a load […]

Tags: Simulator,Technical Papers,Transient Stability

January 8, 2016

## Derivation of the GENTPJ/GENTPF model from the GENROU/GENSAL

Relationship of GENROU, GENSAL, GENTPF, GENTPJ.pdf A set of presentation slides on this topic is also available at this link: Slides on GENROU-GENSAL-GENTPF-GENTPJ_Slides.pdf A fundamental derivation of a GENROU and GENSAL models can found in Chapter 3 of the book Power System Dynamics and Stability by Peter Sauer and M.A. Pai from 1998. This derivation […]

Tags: Simulator,Technical Papers,Transient Stability

October 22, 2015

## Voltage Compensation Data Input Errors leading to Transient Instability

Voltage Compensation can be modeled in a few different ways in PowerWorld Simulator. First, there are Rcomp and Xcomp values which can be specified with the various synchronous machine models such as GENROU, GENSAL, GENTPF, and GENTPJ. In addition, you can add specific other generator models to represent compensation: COMP, CCOMP, COMPCC, CCOMP4, and IEEEVC. Without […]

Tags: Simulator,Transient Stability

October 22, 2015

## Transient stability voltage collapse: See it with large plots and Min/Max result tracking

We had a rather strange support question from a customer running a transient stability run with a three-phase fault that was on for 2 seconds on a 230 kV bus (they were studying delayed clearing of a fault with about a dozen switching actions occurring which eventually cleared the fault after 2 seconds). The network boundary […]

Tags: FAQ,Simulator,Tip,Transient Stability

April 3, 2015