Grid code specifications for demand connections

This document contains the Grid Code Specifications for the Demand Connections required by Fingrid Oyj (hereinafter referred to as “Fingrid”), by virtue of the system responsibility imposed on Fingrid, of distribution networks and demand facilities connected to the Finnish transmission grid and of distribution networks and demand facilities offering demand-side management services and connected to the Finnish power system. In addition to these Specifications, connecting parties shall fulfil Fingrid’s General Connection Terms (YLE) valid at the time of connection, the terms specified in the Main Grid Contract and the connection terms set by the relevant network operator.

The Specifications are based on the European Network Code (EU Commission Regulation 2016/1338), to which Fingrid has made national additions and clarifications. The aim of the European network codes is to guarantee equal and non-discriminatory conditions for competition on the internal energy market, to ensure system security and to create harmonised connection terms for grid connections.

Nationally, the purpose of the Grid Code Specifications for Demand Connections is to ensure that

- the connecting party’s electrical equipment withstands the voltage and frequency fluctuations occurring in the power systems,

- the connecting party’s electrical equipment does not disconnect from the grid due to the frequency and voltage fluctuations,

- while synchronised to the power system, the connecting party’s electrical equipment does not cause any adverse impacts to the other installations connected to the power system, and

- the relevant network operator and Fingrid obtain the data on the connecting party’s electrical equipment, necessary in the planning of the power systems and its operation and in the maintaining of system security.