Damping Measures against Prospective Oscillations between Turkish Grid and ENTSO-E System

摘要

After the synchronous interconnection of TurkishPower System to ENTSO-E CESA (former UCTE) System, inter-area oscillations in the range of 0.15 Hz are prone to occur,according to simulation studies. Therefore, some preventivemeasures should be considered in order to ensure stableoperation of the network after the interconnection. This studysummarizes the effects of following measures based on computersimulations: 1) Retuning of power system stabilizers (PSS) of theimportant power plants in Turkey, 2) Controller modification ofstatic VAR compensators (SVC) existing in steel melting arcfurnaces that are supplied directly from the transmission system,3) Controller modification of ±50 MVAR STATCOM which isdesigned for voltage regulation, 4) Application of breakingresistors as a backup measure in case of malfunctioning of theother solutions. In addition to individual analysis of eachmeasure, their combined contribution is also analyzed. A loadflow scenario, in which Turkey exports 900 MW to ENTO-ECESA System, is utilized as a reference scenario. In simulations,Turkish grid is represented in detail and a reducedrepresentation of ENTSO-E CESA network, which consists of 75nodes and 133 lines, is utilized. The results show positivecontribution of each measure to system damping performance.The study includes comparison of each preventive measure'scontribution level and conclusive recommendations.