Knowledge Base

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

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 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

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

This article covers how to model a wind or solar plant using the second generation wind turbine models that have been developed through WECC’s Model Validation Working Group (MVWG).  The details of these models are explained in detail in PDF documents on the WECC website at the following link:  WECC MVWG Approved Model Specifications You […]

Tags: Presentation,Product,Simulator,Transient Stability,Tutorial,Type

June 11, 2014

Note: Download a small sample case at the following link which is used in this demonstrate: MotorStart Case Note: Starting in the July 10, 2013 patch of Simulator 17, a modification was made to automatically change the integration time step for the entire simulation when induction motors (loads) or induction machine (generators) drop below 0.1 per […]

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

July 2, 2013

A common question when a user first starts playing with very small transient stability test cases is “Why do I see wiggles in my plots with no disturbance?”  On large transient stability simulations there can be many different reasons for this, but for a 9 bus, 1 generator case you would rightly not expect to […]

Tags: FAQ,Simulator,Tip,Transient Stability,Tutorial

June 12, 2013

Transient Limit Monitoring Many power systems require particular voltage or frequency performance during transient stability simulation.  For example, in the Western grid in the United States and Canada, the organization WECC specifies particular performance for various “Category B” or “Category C” contingency events (see http://www.wecc.biz/library/Library/Planning%20Committee%20Handbook/WECC-NERC%20Planning%20Standards.pdf). PowerWorld Simulator’s transient limit monitors allow you to monitor for violations […]

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

May 23, 2013