Knowledge Base

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: ,,,,,,

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: ,,,

October 19, 2016

EMP Simulation Example

NOTE: This example requires PowerWorld Simulator version 20 beta. Please contact us if you are interested in testing and evaluating this software. PowerWorld is developing the capability to analyze the E3 effects of a high-altitude electromagnetic pulse (HEMP) attack on the power system. Algorithms are based on Oak Ridge National Laboratory research. To perform a sample […]

Tags: ,,,

June 24, 2016

Complete Case Auxiliary File Export Format Descriptions

PowerWorld’s Auxiliary File Format is very flexible in providing a mechanism for saving model information from PowerWorld Simulator.  It also provides a great way to share information with others.  This flexibility however has some downsides as puts additional burden on the user to know which things to save.  Many tools within PowerWorld Simulator overcome this by including […]

Tags: ,,

May 13, 2016

Using Special Variables with Scripts or SimAuto

Some Simulator functions cause special variables to be created for storing results. The multiple element TLR sensitivity is a common example. Special variables are used to hold the sensitivities of flows on those multiple elements with respect to injections at various points. The number of special variables in use depends on the number of branches […]

Tags: ,,,

February 1, 2016

Using Contingency Categories for monitoring of different voltage deviation limits for different contingencies

Previous knowledge base articles have covered both Monitoring voltages for Post Contingency Voltage Drop Criteria Monitoring which covered how to monitor all buses in the system for a particular voltage drop. How to specify different Voltage Deviation Limits for different buses in Contingency Analysis which did a similar thing but allowed the criteria to be […]

Tags: ,,,

September 30, 2015

GIC and Geographic Data View

Simulator’s Geographic Data View feature is uniquely suited for visualizing geomagnetically induced current (GIC) flows over a wide area. In the graphic below, each substation is depicted by a colored circle. The size of the circle is proportional to the GIC flowing through the neutral, while the color indicated whether GIC is flowing into or […]

Tags: ,,

August 18, 2015

Assigning Costs to Control Adjustments in OPF

Download the example files. Simulator’s Optimal Power Flow (OPF) has 2 options for objective functions: Minimum Cost or Minimum Control Change. Generally Minimum Cost is used where generator bids or costs and load benefits are known. Minimum Control Change is used where it is desirable to relieve transmission overloads with minimum deviation from the present […]

Tags: ,,

March 2, 2015

Optimal Power Flow with Load Dispatch

Download the example files. These examples show how Simulator’s Optimal Power Flow (OPF) may be used with dispatchable loads to relive transmission overloading. First, the OPF may be used with the minimum control change objective function. Here, the “cost” of changing a control (generator or load output) is the same for each MW of change […]

Tags: ,,

January 5, 2015

How to specify different Voltage Deviation Limits for different buses in Contingency Analysis

PowerWorld Simulator allows you to monitor for violations based on the change in a value relative to the reference state (base case).  This was already covered in the knowledge base article at WECC Post Contingency Voltage Drop Criteria Monitoring.  This works well if you have the same percentage drop violation for all buses in your system. […]

Tags: ,,,,

January 2, 2015

Page 1 of 512345