Power Transfer Limit Exceeded by OPF
The Optimal Power Flow (OPF) solution involves iteration between a linear program (LP) to adjust controls (usually generation) and a non-linear power flow. If an AC OPF is performed over a very large Area (or Super Area), the LP may attempt to dispatch generators in a manner that exceeds voltage stability margins (PV) or maximum […]
October 17, 2023
EMP Waveforms Based on Published Research
The newest builds of PowerWorld Simulator with the GIC add-on no longer contain a function to calculate time-varying series voltage inputs for EMP E3A and E3B time and spatial functions based on Oak Ridge National Laboratory (ORNL) research [1] and International Electrotechnical Commission (IEC) standards. Going forward, non-uniform time and spatially varying electric fields will […]
Tags: GIC,How-to,Simulator,Tip
October 5, 2023
Historic North American GMD Events
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. Surface electric field models developed by NOAA Space Weather Prediction Center with Empirical Magnetotelluric Transfer Functions (EMTF), which […]
August 14, 2023
WECC Area Interchange Diagram
These files include one-line diagrams and support files to show area interchange in WECC cases. A description of each file is as follows: WECCAreaDIagramGE.pwd: a one-line diagram similar to those developed in the GE PSLF program. (Interface quantities are complete in the Northwest region but may need to be added elsewhere for completeness.) WECCAreaDiagramGE.aux: auto-inserts […]
July 26, 2023
NOAA SWPC Geoelectric Field Models
The National Oceanic and Atmospheric Administration’s Space Weather Prediction Center (SWPC) offers geoelectric field inputs that can be used with PowerWorld Simulator GIC. Data are accessed from the SWPC Geoelectric Field Model landing page. The tabs at the top allow viewing of E-fields computed from 1D (EPRI) or 3D (NSF EarthScope USArray project) Earth resistivity […]
July 11, 2023
PJM Base Case Setup Process
Motivation: PJM Network Model power flow cases typically have a large generation/load imbalance that result in large positive or negative generation at the island slack bus and distorted flows on nearby lines and transformers. The island slack bus is often located within PJM. A recent example has -6.6 GW at Peach Bottom (PEACHBOT 22.00 kV). […]
Tags: Cases,How-to,Script,Simulator,Tip
February 17, 2023
Add GIC-Related Object Data Fields to Displays
This auxiliary file (updated October 4, 2022) will modify Case Information Displays for the following objects to include GIC-related data fields: Bus Generator Load Branch Inputs Transformer Controls Switched Shunts Line Shunts Substation DC Transmission Line MTDC Converters VSC DC Lines This enables easy viewing, editing, and sharing of GIC-related data between Simulator users, without […]
October 4, 2022
3D File Format for GMD/HEMP Event Inputs
The B3D binary file format uses little-endian order and holds two-dimensional, time-varying data such as electric fields on the surface of the earth. Because the magnitude and direction can be non-uniform in time and space, it can be used where a 3D earth resistivity model is assumed. Applications in PowerWorld Simulator include geomagnetic disturbance (GMD) […]
Tags: Documentation,GIC
January 31, 2022
Induction Motor Modeling and Progressive Tripping and Reconnecting
The WECC MVS Load Meeting on August 10, 2021 was held via online web conference. Jamie Weber of PowerWorld Corporation presented several topics on induction motor modeling and progressive tripping reconnecting. Link to these presentations are as follows. Three Phase Induction Machine Model History Phasor Model of Single Phase Induction Motor Model INDMOT1P model documentation […]
Tags: Product,Simulator,Transient Stability
August 11, 2021
N-1-1 Contingency Scenario ATC Analysis
The ATC analysis in Simulator can include a set of contingencies defined in the contingency analysis tool during the ATC calculation. The key is getting that list of contingencies defined for the N-1-1 contingencies. Each contingency will have 2 actions defined, which Simulator will evaluate for outages when calculating the sensitivities used for the ATC […]
Tags: How-to,Simulator,Tutorial
March 3, 2021