Experimental validation of frequency control from offshore wind power plants in multi-terminal DC grids

Jayachandra N. Sakamuri; Joan Sau-Bassols; Eduardo Prieto-Araujo; Oriol Gomis-Bellmunt; Müfit Altin; Anca Daniela Hansen; Nicolaos Antonio Cutululis

Experimental validation of frequency control from offshore wind power plants in multi-terminal DC grids

Jayachandra N. Sakamuri^*, Joan Sau-Bassols, Eduardo Prieto-Araujo, Oriol Gomis-Bellmunt, Müfit Altin, Anca Daniela Hansen, Nicolaos Antonio Cutululis

^*Corresponding author for this work

Department of Wind Energy

Research output: Contribution to journal › Journal article › Research › peer-review

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Abstract

This paper presents two methods for frequency control of onshore AC grids from offshore wind power plants (OWPPs) connected to a multi-terminal DC (MTDC) grid. The first method is based on communicating the onshore frequency to the OWPP and the other voltage source converters (VSCs) in the MTDC grid. The second method is based on a coordinated strategy between the VSCs in the MTDC grid, where the onshore frequency is replicated at the offshore grid using additional control blocks implemented locally at the VSCs of the MTDC grid. The proposed control methods are first verified through simulations on a test set up with an OWPP connected to a three-terminal DC grid using DIgSILENT PowerFactory and then validated experimentally on a laboratory scaled three-terminal DC grid. The simulation and experimental results prove that, with the proposed control strategies, OWPPs and the VSCs in the MTDC grid can participate in frequency control and support the onshore grid frequency stability.

Original language	English
Journal	CIGRE Science & Engineering
Volume	10
Pages (from-to)	95-112
Publication status	Published - 2018

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@article{4f71a4ec8f7d4fe880da673842bcdc5b,

title = "Experimental validation of frequency control from offshore wind power plants in multi-terminal DC grids",

abstract = "This paper presents two methods for frequency control of onshore AC grids from offshore wind power plants (OWPPs) connected to a multi-terminal DC (MTDC) grid. The first method is based on communicating the onshore frequency to the OWPP and the other voltage source converters (VSCs) in the MTDC grid. The second method is based on a coordinated strategy between the VSCs in the MTDC grid, where the onshore frequency is replicated at the offshore grid using additional control blocks implemented locally at the VSCs of the MTDC grid. The proposed control methods are first verified through simulations on a test set up with an OWPP connected to a three-terminal DC grid using DIgSILENT PowerFactory and then validated experimentally on a laboratory scaled three-terminal DC grid. The simulation and experimental results prove that, with the proposed control strategies, OWPPs and the VSCs in the MTDC grid can participate in frequency control and support the onshore grid frequency stability. ",

author = "Sakamuri, {Jayachandra N.} and Joan Sau-Bassols and Eduardo Prieto-Araujo and Oriol Gomis-Bellmunt and M{\"u}fit Altin and Hansen, {Anca Daniela} and Cutululis, {Nicolaos Antonio}",

year = "2018",

language = "English",

volume = "10",

pages = "95--112",

journal = "CIGRE Science & Engineering",

issn = "2426-1335",

publisher = "CIGRE (International Council on Large Electric Systems)",

}

Experimental validation of frequency control from offshore wind power plants in multi-terminal DC grids. / Sakamuri, Jayachandra N.; Sau-Bassols, Joan; Prieto-Araujo, Eduardo; Gomis-Bellmunt, Oriol; Altin, Müfit; Hansen, Anca Daniela ; Cutululis, Nicolaos Antonio.

In: CIGRE Science & Engineering, Vol. 10, 2018, p. 95-112.

Research output: Contribution to journal › Journal article › Research › peer-review

TY - JOUR

T1 - Experimental validation of frequency control from offshore wind power plants in multi-terminal DC grids

AU - Sakamuri, Jayachandra N.

AU - Sau-Bassols, Joan

AU - Prieto-Araujo, Eduardo

AU - Gomis-Bellmunt, Oriol

AU - Altin, Müfit

AU - Hansen, Anca Daniela

AU - Cutululis, Nicolaos Antonio

PY - 2018

Y1 - 2018

N2 - This paper presents two methods for frequency control of onshore AC grids from offshore wind power plants (OWPPs) connected to a multi-terminal DC (MTDC) grid. The first method is based on communicating the onshore frequency to the OWPP and the other voltage source converters (VSCs) in the MTDC grid. The second method is based on a coordinated strategy between the VSCs in the MTDC grid, where the onshore frequency is replicated at the offshore grid using additional control blocks implemented locally at the VSCs of the MTDC grid. The proposed control methods are first verified through simulations on a test set up with an OWPP connected to a three-terminal DC grid using DIgSILENT PowerFactory and then validated experimentally on a laboratory scaled three-terminal DC grid. The simulation and experimental results prove that, with the proposed control strategies, OWPPs and the VSCs in the MTDC grid can participate in frequency control and support the onshore grid frequency stability.

AB - This paper presents two methods for frequency control of onshore AC grids from offshore wind power plants (OWPPs) connected to a multi-terminal DC (MTDC) grid. The first method is based on communicating the onshore frequency to the OWPP and the other voltage source converters (VSCs) in the MTDC grid. The second method is based on a coordinated strategy between the VSCs in the MTDC grid, where the onshore frequency is replicated at the offshore grid using additional control blocks implemented locally at the VSCs of the MTDC grid. The proposed control methods are first verified through simulations on a test set up with an OWPP connected to a three-terminal DC grid using DIgSILENT PowerFactory and then validated experimentally on a laboratory scaled three-terminal DC grid. The simulation and experimental results prove that, with the proposed control strategies, OWPPs and the VSCs in the MTDC grid can participate in frequency control and support the onshore grid frequency stability.

M3 - Journal article

VL - 10

SP - 95

EP - 112

JO - CIGRE Science & Engineering

JF - CIGRE Science & Engineering

SN - 2426-1335

ER -