How to specify when Transient Limit Monitoring starts monitoring for violations
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
Remedial Action Scheme (RAS) Modeling in Contingency Analysis
A PDF White Paper on RAS Model can be found at this link: RAS_Modeling_PowerWorld Sample PowerWorld Cases and Auxiliary Files that demonstrate the RAS Modeling described in the White Paper can be found in the ZIP file at this Link. PowerWorld is often asked questions about how to model automated and conditional actions that occur […]
Tags: How-to,Product,Simulator,Technical Papers,Tutorial,Type
May 10, 2013
Video Capture
PowerWorld Simulator does not include a built-in tool for video capture or movie making. Commercial and freeware tools are available from other sources to capture video from PowerWorld Simulator, Retriever, and any other desktop applications. Current offerings may be found here, or by simply searching online for video capture software.
Tags: FAQ,How-to,OPS-X Trainer,Retriever,Simulator,Viewer
February 21, 2013
Example SimAuto Files
Right-click on the file links below and select “Save target as…” to save them to your computer. SimAuto version 12 (and later) Microsoft® Visual Basic for Applications Examples Running from Microsoft® Excel: SimAutoExampleCases12.zip Running from Microsoft® Access: ATC Calculator (includes database, cases, and support files) Multi-period Market Simulation (includes database, cases, and support files; unzip […]
Tags: Script,SimAuto,Simulator
July 31, 2012
How do the key fields and required fields for aux files and copy/paste from Excel work?
Each object type in Simulator (i.e. Loads, Generators, Buses, etc…) has a number of key fields and additional required fields. Key fields are fields that must be included for existing records when pasting data into Simulator from a spreadsheet application such as MS Excel or when loading information from an aux file. Required fields are fields that must be specified (in addition […]
July 5, 2012
What method does the OPF/SCOPF solution use?
It is a sequential linear programming optimal power flow. We use our own revised simplex code.
July 5, 2012
I am getting $5000 / MW-hr LMP’s. Can that be correct?
If a constraint cannot be enforced due to insufficient controls, the slack variable associated with enforcing that constraint cannotbe removed from the LP basis. Marginal cost depends on the arbitrary cost of the slack variable. This value defaults to $5000 per MW-hr in order to enforce the equality constraint that a control area’s generation should […]
July 5, 2012
Can I have negative marginal prices? What do they mean?
Yes, in highly congested systems you can in fact see negative LMP’s at a bus (or buses). This is always coupled with high LMP’s at other buses. A negative LMP means that serving an additional MW of load at the negative LMP bus will reduce the operating cost. More flow to the load creates a […]
July 5, 2012
How can I simulate varying quantities? Can I store the results?
You can simulate varying quantities (and store the results) by using the Time Step Simulation (TSS) tool. TSS allows you to specify operating conditions and obtain power flow solutions for a set of points in time. It provides the tools needed to analyze the operation of a power system hour by hour. TSS is included in […]
July 5, 2012
How does Simulator convert transmission line flow between MVA and Amps?
Variables that are calculated by a power flow are the MVA flow leaving a bus along a transmission line and the bus voltage. -The MVA flow is the total MVA flow on all three phases of the transmission line (S3-ø). -The voltage is the line-to-line voltage (Vline-line) Current is only defined for a single phase, […]
July 5, 2012