Conformity with transmission Code 2019 (TC2019)
The transmission code (TC) is a document that defines the rules and technical requirements that must be observed by all parties playing a significant role in the transmission system (TS). HYDRO Exploitation has developed a specific tool that can quickly assess the technical conformity of the plants following a new edition of the TC released in 2019.
The concerned power
plants are those connected directly to the 220/380 kV grids or those with a
total power greater than 75 MW. In particular, the TC sets the suitability
criteria for participation in the ancillary services as well as the minimum
technical characteristics and operating ranges that need to be guaranteed.
release of the new edition of this document in 2019, the operator of the TS,
Swissgrid, asked the owners of the concerned power plants to report any non-coformities
with the TC2019. After this, HYDRO Exploitation has been mandated to assess the
technical conformity of one of its clients’ plants.
As part of
these analyses, HYDRO Exploitation has developed a specific tool to represent
the operating areas of the machines bases on the parameters programmed in their
control and protection systems. A straightforward comparison with the ranges in
the TC therefore suffices to assess the conformity of the machines according to
the corresponding requirements.
The study of
certain criteria, such as the transient stability in case of a three-phase
short circuit (FRT), requires more advanced calculations and, in particular,
simulations using the SIMSEN software.
The results of
those analyses are ultimately compiled into a report for the client as well as a
list for Swissgrid, showing the identified non-conformities.
Exploitation has all the necessary tools to assess whether a power plant
complies with the TC2019.