Abstract : The electric systems and the associated infrastructures interfere more and more one another
and the global vulnerability increases. Due to the complexity and connectivity, a single
infrastructure failure could have cascading effects. The transmission system operators
guarantee the electric power systems operational security. In order to administrate it as well as
possible, system operators use as tools the ‘ancillary services', supplementary functions
performed, as a support for their basic services, by the same equipments that produce and
transmit the fundamental electricity commodity. In the nowadays deregulation context, new
independent power producers demand the connection to the transmission and distribution
grid. These new producers are constrained to participate to ancillary services. In order to
maintain the grid security and reliability, to allow the commercial transactions correct
functioning, system operators are responsible of the ancillary services existence in appropriate
quantities and of the power producers control in terms of ancillary services participation ratio.
This PhD thesis proposes a power producers' performance control based on parameter
estimation starting from disturbances measurements.