APPLICATION OF HVDC TO THE EMERGENCY CONTROL OF THE HYBRID DC/AC ENTSO-E – IPS/UPS NETWORK INTERFACE A. ARESTOVA, A. GROBOVOY Power System Emergency Control Lab Russia

The interconnection of the power systems of the European Community (ENTSO-e) and of the Commonwealth of Independent States (IPS/UPS) arise several challenges for which regards the operation and the emergency control of a very geographically extended interconnected power system. Recent international projects on the possibility of interconnection considered the option of synchronous interconnection through high voltage alternating current (HVAC) transmission lines. Progresses in high voltage direct current (HVDC) technologies in the last years open the possibility of investigating other interconnection philosophies such as purely asynchronous (i.e. using solely HVDC technologies), or hybrid (i.e. HVDC embedded in HVAC networks). ICOEUR, the joint project cofinanced by the Russian Academy of Science and by the EU Commission has been set up to analyze possible solutions for some of these challenges with particular focus on the operation and emergency control. This paper proposes new emergency control philosophies of the interconnection using the hybrid HVAC/HVDC option that seems, from the point of view of emergency control, the most effective choice.