Technical Presentations

Author(s): Sam Maleki
Type:PDF Presentation
Downloaded: 18
Date: 2022-07-21

Capacitor energization, power system conversion, and load flow studies in EMTP858

Abstract
The addition of capacitor banks to the system may result in the frequency shift of the resonance modes in the system. This change may result in undesired interaction of the system with other elements ... see moreduring the transients. In addition, the energization of the capacitor banks may result in undesired over voltage and high inrush current (above the breaker capability limits).

Following steps has been taken to ensure the addition of the new cap bank to the system will not adversely affect the performance of the system

• System conversion to EMTP from PSSE using import tool function in EMTP for 5 busses away from the system
• Running the load flow and benchmarking the results
• Running the frequency scan of the system
• Performing the transient studies for 100 breaker closing instances
• Perform the statistical analysis (available tool in EMTP)
• Perform the worst-case scenario achieved during the statistical analysis

Tag(s): capacitor switching, overvoltage, inrush current, PSS/E import tool, frequency scan, statistical analysis

Author(s): Henry Gras
Type:Technical Presentation
Date: 2021-08-31

EMTP Development Roadmap: PSS/E Import Tool in EMTP 4.2830

Abstract
1. Custom device usage
- New option which allows to import a user-defined device
- Scripts may be called to process the parameters of the RAW, SEQ and DYR files
- The user customer devi... see moreces file section provides the interface

2. Import only specific part of a grid
- This new option allows user to import only specific parts of the RAW file
- PSS/E is required to use this option

Tag(s): EMT simulation, PSSE, grid, import tool