Proving a concept of flexible under-frequency load shedding with hardware-in-the-loop testing

Denis Sodin (Author), Rajne Ilievska (Author), Andrej Čampa (Author), Miha Smolnikar (Author), Urban Rudež (Author)

Abstract

It is widely recognized that in the transition from conventional electrical power systems (EPSs) towards smart grids, electrical voltage frequency will be greatly affected. This is why this research is extremely valuable, especially since rate-of-change-of-frequency (RoCoF) is often considered as a potential means of resolving newly arisen problems, but is often challenged in practice due to the noise and its oscillating character. In this paper, the authors further developed and tested one of the new technologies related to under-frequency load shedding (UFLS) protection. Since the basic idea was to enhance the selected technology’s readiness level, a hardware-in-the-loop (HIL) setup with an RTDS was assembled. The under-frequency technology was implemented in an intelligent electronic device (IED) and included in the HIL setup. The IED acted as one of several protection devices, representing a last-resort system protection scheme. All main contributions of this research deal with using RoCoF in an innovative UFLS scheme under test: (i) appropriate selection and parameterization of RoCoF filtering techniques does not worsen under-frequency load shedding during fast-occurring events, (ii) locally measured RoCoF can be effectively used for bringing a high level of flexibility to a system-wide scheme, and (iii) diversity of relays and RoCoF-measuring techniques is an advantage, not a drawback.

Keywords

podfrekvenčno razbremenjevanje;pametne elektronske naprave;potrditev koncepta;preizkušanje v zaprti zanki;simulator za dinamičlne izračune v realnem času;rezerva;under-frequency load shedding;intelligent electronic device;proof of concept;hardware-in-the-loop testing;real-time digital simulator;frequency stability margin;

Data

Language:	English
Year of publishing:	2020
Typology:	1.01 - Original Scientific Article
Organization:	UL FE - Faculty of Electrical Engineering
UDC:	537
COBISS:	24709891
ISSN:	1996-1073
Views:	164
Downloads:	64
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	podfrekvenčno razbremenjevanje;pametne elektronske naprave;potrditev koncepta;preizkušanje v zaprti zanki;simulator za dinamičlne izračune v realnem času;rezerva;
Type (COBISS):	Article
Pages:	str. 1-17
Volume:	ǂno. ǂ14
Issue:	3607
Chronology:	2020
DOI:	10.3390/en13143607
ID:	14101871