Assessment of power step performances of variable speed pump-turbine unit by means of hydro-electrical system simulation

• Type: Article in International Conference Proceedings Book
• Date: 2017

Authors

Beguin, A (Author) Other; Nicolet, C (Author) Other; Hell, J (Author) Other; C. L. Moreira (Author) FEUP

Conference proceedings International

Title: HYPERBOLE SYMPOSIUM 2017 (HYDROPOWER PLANTS PERFORMANCE AND FLEXIBLE OPERATION TOWARDS LEAN INTEGRATION OF NEW RENEWABLE ENERGIES)

Symposium on Hydropower plants Performance and flexible Operation towards Lean integration of new renewable Energies (HYPERBOLE)

Porto, PORTUGAL, FEB 02-03, 2017

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 14 Citations

Other information

Authenticus ID: P-00M-PMC

DOI: 10.1088/1742-6596/813/1/012001

Abstract (EN): The paper explores the improvement in ancillary services that variable speed technologies can provide for the case of an existing pumped storage power plant of 2x210 MVA which conversion from fixed speed to variable speed is investigated with a focus on the power step performances of the units. First two motor-generator variable speed technologies are introduced, namely the Doubly Fed Induction Machine (DFIM) and the Full Scale Frequency Converter (FSFC). Then a detailed numerical simulation model of the investigated power plant used to simulate power steps response and comprising the waterways, the pump-turbine unit, the motor-generator, the grid connection and the control systems is presented. Hydroelectric system time domain simulations are performed in order to determine the shortest response time achievable, taking into account the constraints from the maximum penstock pressure and from the rotational speed limits. It is shown that the maximum instantaneous power step response up and down depends on the hydro-mechanical characteristics of the pump-turbine unit and of the motor-generator speed limits. As a results, for the investigated test case, the FSFC solution offer the best power step response performances.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5