System Separation
- event System Separation In The Continental Europe Synchronous Area
- category Transmission line tripping
- contingency type Busbar coupler CB tripping
- primary cause Under investigation
- secondary causes No content
- impacts No content
- mitigations No content
- number of customers affected No content
- epri research program P40 - Transmission Planning
- epri research project 40.018 - Transmission Protection Support Tools
- epri research deliverable Protection System Evaluation Tool (PSET) User Group
description
The transmission system protection devices separated the CE system into two areas by tripping line by line, thereby saving the system from more instabilities and related serious damage. The separation phenomena were characterized by:
- A very fast voltage collapse at all substations close to the line of separation,
- Rapid increase of the voltage phase angle difference between the two areas, and
- A gradual difference in the frequencies of the two areas – the frequency was increasing in the South-East area and decreasing in the North-West area.