Virtual Inertia Control of Variable Speed Heat Pumps for the Provision of Frequency Support

Ismail Ibrahim, Cathal O’Loughlin and Terence O’Donnell
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Ismail Ibrahim: School of Electrical and Electronics Engineering, University College Dublin, D04V1W8 Dublin, Ireland
Cathal O’Loughlin: School of Electrical and Electronics Engineering, University College Dublin, D04V1W8 Dublin, Ireland
Terence O’Donnell: School of Electrical and Electronics Engineering, University College Dublin, D04V1W8 Dublin, Ireland

Energies, 2020, vol. 13, issue 8, 1-22

Abstract: The growth in the integration of converter interfaced renewable energy has reduced the system inertia, which threatens system stability due to high rate of change of frequency (RoCoF) and frequency nadir issues unless steps are taken to mitigate it. There is a need to provide sufficient fast frequency response to maintain adequate inertia in the system. This paper investigates the capabilities of a variable speed heat pump to provide an emulated inertial response. This paper presents a virtual synchronous machine control for a variable speed heat pump that provides support for grid frequency regulation over the inertial response time frame. A small-signal model with the transfer function of the variable speed heat pump is developed to analyse the effectiveness and feasibility of providing virtual inertia at the device and grid level, respectively. Furthermore, the small-signal model is validated using hardware in the loop simulation. Finally, the aggregated frequency response and virtual inertia contribution by a population of the heat pumps are evaluated and quantified in an urban distribution system.

Keywords: variable speed heat pump (VSHP); virtual inertia; small-signal analysis; hardware in the loop (HIL); frequency regulation; demand response (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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