PGE/REWE 2015

Sessions Speakers Exhibitors Products Press Releases Show Specials Floor Plan

Impact of New Flexible Load Operation and Grid Codes on Turbine Generators Focused on the End Winding (Room G105, Auditorium Centre, First Floor)

11 Jun 15
11:00 AM - 12:30 PM

Tracks: Theme: Grid Support with Data & Generators, Theme: Renewable Energy Strategy, Business & Integration

The integration of renewable energy sources with power injection preference into the high voltage transmission system results in fundamental changes of the global and local load regime of European transmission grid. New power plant operation demands need to be defined for the conventional units. The turbine generator as the electrical key component of the plant will face to new operational stresses created by the more flexible grid behavior. To handle this novel situation the Agency for the Cooperation of Energy Regulators (ACER) of the European Commission in Brussels has elaborated a new European grid code called European Network Code for Transmission System Operators including Requirements for Generators ENTSO-E NC RfG. It is a frame work of requirements which covers the spectrum of the different national grid codes. The new European Network Code requires a higher flexibility in operation conditions of the power plant generator to maintain security of energy supply and grid stability. The consequences of this new network code for running generators in the plant and especially for design and manufacturing of future generators are drawn up in this paper. The correlation between individual grid code requirements, extrapolated physical-technical utilization stresses and affected generator components is demonstrated by some examples. In a comparison of different design type of turbine generators the influence of individual grid code requirements on special components like stator core, machine windings, bearings or shaft train is given based on qualitative analysis. Based on the FEM analysis of stator end winding the impact of fast load changed on the stator bars is further investigated. For generators running in service since many years and now faces to the new grid demands a comprehensive online monitoring and diagnostic concept is presented as a first step.