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Rapporto RSE 17001212

Load control for system security purposes: opportunities and issues

Rapporto

2016

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A. Pitto (RSE SpA), F. Conte (Università degli Studi di Genova), M. Crosa di Vergagni (Università degli Studi di Genova), F. Silvestro (Università degli Studi di Genova), D. Cirio (RSE SpA) , A. Gatti (RSE SpA), E. Ciapessoni (RSE SpA)

GESTDOMANDA 2016 - Demand side management

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This deliverable deals with the support to grid frequency regulation provided by two classes of domestic thermostatic loads, namely refrigerators and boilers.

In particular, thermostatic loads have been modeled to assess the impact of some parameters affecting the operating reserve availability, to evaluate the static power (temperature)/frequency regulation characteristic and the dynamic response to (large and small) frequency disturbances. The dynamic response has been simulated using a bus-bar model of the Sardinian system at the 2020 horizon and considering several load control strategies, including the scheme suggested by the new ENTSO-E network code. Thermostatic loads and test grid have been modeled in MATLAB®/Simulink™ environment.

External temperature conditions may have a significant impact on the availability of the thermostatic loads, so affecting the operating reserve availability and static power (temperature) - frequency characteristic. The power output response during the frequency transients shows the ability of the thermostatic loads to contribute effectively to the frequency regulation, ensuring a minimum impact on secondary regulation. In addition, a continuous primary frequency regulation reduces the amount of ancillary services provided by conventional power plants with a reduction of ancillary services cost.