Method for calculating primary time constant of power grid
US8805666B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2011 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Sep 16, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R31/62
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for calculating a primary time constant of a power grid. It comprises the steps of: establishing an electromechanical transient model of the power grid using the widely used power system analysis software package (PSASP) according to the actual power grid parameters and network topology; establishing an electromagnetic transient model under PASAP using the actual power grid parameters for a site which requires the calculation of the primary time constant of the power grid, and setting a ground short circuit fault at the site; obtaining a transient short circuit current of the short circuit point of the power grid using a hybrid simulation method of the electromechanical and electromagnetic transient models; filtering out a periodic component in the transient short circuit current to obtain a non-periodic component attenuated with time, and finding the attenuation time constant of the non-periodic component which is the primary time constant of the power grid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.