Evaluation of Efficient Frequency Control Strategies in a Wind-Hydro Dominated Power System
Paper in proceeding, 2021

This paper aims to investigate the possibility of providing a joint service of coordinated frequency support from hydro units and wind turbines (WTs) in a low inertia power system. While WTs can arrest the initial frequency dip (IFD) by providing fast support using their converter controllers, hydro turbines are capable of mitigating the second frequency dip (SFD) resulting from the restoration phase of WTs by increasing their production accordingly. Furthermore, a recently-issued grid-code for fast frequency reserve (FFR) provision in the Nordic synchronous area (NSA) is analysed and compared with the proposed method. Results show that the proposed coordinated frequency support strategy can mitigate both the IFD and the SFD with less energy requirements compared to the grid-code characteristics.

Wind turbines


frequency nadir

fast frequency reserve

hydro turbines


Ahmed Marwan Mousa Sunjaq

Chalmers, Electrical Engineering, Electric Power Engineering

Peiyuan Chen

Chalmers, Electrical Engineering, Electric Power Engineering

IEEE Power and Energy Society General Meeting

19449925 (ISSN) 19449933 (eISSN)

Vol. 2021-July
9781665405072 (ISBN)

2021 IEEE Power and Energy Society General Meeting, PESGM 2021
Washington, USA,

Grid Strength Metrics and Evaluation in Converter-Dominated Grids

Swedish Energy Agency (Projektnr-47589-1), 2019-02-01 -- 2020-12-31.

Subject Categories

Other Engineering and Technologies not elsewhere specified

Energy Systems

Other Electrical Engineering, Electronic Engineering, Information Engineering



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