On-line voltage security assessment of the Hellenic interconnected system

This paper describes the on-line voltage security assessment environment developed within the framework of the EU-sponsored OMASES project, as well as its application to the Greek Interconnected Power System. The heart of all computations is a fast time-domain method. Security is analyzed with respect to power transfers in critical corridors or power consumption in load areas. Results take on the form of either pre-contingency secure operation limits, or post-contingency load-ability limits, together with various diagnosis tips. Typical results obtained during the test phase of the project are reported.