A Droop Line Tracking Control for Multi-terminal VSC-HVDC Transmission System

Roni Irnawan, Filipe Miguel Faria da Silva, Claus Leth Bak, Anna Margareta Lindefelt, Alex Alefragkis

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

In theory, the control mode of a voltage-sourced converter (VSC) within a multi-terminal HVDC (MTDC) transmission system can be represented by using a droop line characteristic in the active power and DC voltage relationship (Pac–Udc) curve. However, operating the droop control as an extension of the Udc control mode with a steep slope was found to be difficult since it introduces instabilities. This also happens in the extended Pac control with a shallow slope. This paper proposes a droop line tracking (DLT) method for mitigating these issues, i.e. by calculating the new operating point of the converter based on the displacement distance from the droop line. The simulation results show that the proposed method enables the converter to operate in different control modes by simply changing the droop line characteristic. Furthermore, the same concept can be extended to implement the advanced droop control, i.e. represented by a multi-slope droop line characteristic such that the converter can be operated in different control modes depending on the DC system disturbance level. Simulation using a three-terminal HVDC system with an offshore wind farm (OWF) station has been performed to demonstrate the functionality of the proposed method in realizing the advanced droop control mode.
OriginalsprogEngelsk
TidsskriftElectric Power Systems Research
Vol/bind179
Antal sider22
ISSN0378-7796
DOI
StatusUdgivet - feb. 2020

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title = "A Droop Line Tracking Control for Multi-terminal VSC-HVDC Transmission System",
abstract = "In theory, the control mode of a voltage-sourced converter (VSC) within a multi-terminal HVDC (MTDC) transmission system can be represented by using a droop line characteristic in the active power and DC voltage relationship (Pac–Udc) curve. However, operating the droop control as an extension of the Udc control mode with a steep slope was found to be difficult since it introduces instabilities. This also happens in the extended Pac control with a shallow slope. This paper proposes a droop line tracking (DLT) method for mitigating these issues, i.e. by calculating the new operating point of the converter based on the displacement distance from the droop line. The simulation results show that the proposed method enables the converter to operate in different control modes by simply changing the droop line characteristic. Furthermore, the same concept can be extended to implement the advanced droop control, i.e. represented by a multi-slope droop line characteristic such that the converter can be operated in different control modes depending on the DC system disturbance level. Simulation using a three-terminal HVDC system with an offshore wind farm (OWF) station has been performed to demonstrate the functionality of the proposed method in realizing the advanced droop control mode.",
keywords = "DC voltage control, Distributed control, Displacement control, Droop control, HVDC transmission, Multi-terminal HVDC (MTDC), Voltage-sourced converter (VSC)",
author = "Roni Irnawan and Silva, {Filipe Miguel Faria da} and Bak, {Claus Leth} and Lindefelt, {Anna Margareta} and Alex Alefragkis",
year = "2020",
month = "2",
doi = "10.1016/j.epsr.2019.106055",
language = "English",
volume = "179",
journal = "Electric Power Systems Research",
issn = "0378-7796",
publisher = "Elsevier",

}

A Droop Line Tracking Control for Multi-terminal VSC-HVDC Transmission System. / Irnawan, Roni; Silva, Filipe Miguel Faria da; Bak, Claus Leth; Lindefelt, Anna Margareta; Alefragkis, Alex.

I: Electric Power Systems Research, Bind 179, 02.2020.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - A Droop Line Tracking Control for Multi-terminal VSC-HVDC Transmission System

AU - Irnawan, Roni

AU - Silva, Filipe Miguel Faria da

AU - Bak, Claus Leth

AU - Lindefelt, Anna Margareta

AU - Alefragkis, Alex

PY - 2020/2

Y1 - 2020/2

N2 - In theory, the control mode of a voltage-sourced converter (VSC) within a multi-terminal HVDC (MTDC) transmission system can be represented by using a droop line characteristic in the active power and DC voltage relationship (Pac–Udc) curve. However, operating the droop control as an extension of the Udc control mode with a steep slope was found to be difficult since it introduces instabilities. This also happens in the extended Pac control with a shallow slope. This paper proposes a droop line tracking (DLT) method for mitigating these issues, i.e. by calculating the new operating point of the converter based on the displacement distance from the droop line. The simulation results show that the proposed method enables the converter to operate in different control modes by simply changing the droop line characteristic. Furthermore, the same concept can be extended to implement the advanced droop control, i.e. represented by a multi-slope droop line characteristic such that the converter can be operated in different control modes depending on the DC system disturbance level. Simulation using a three-terminal HVDC system with an offshore wind farm (OWF) station has been performed to demonstrate the functionality of the proposed method in realizing the advanced droop control mode.

AB - In theory, the control mode of a voltage-sourced converter (VSC) within a multi-terminal HVDC (MTDC) transmission system can be represented by using a droop line characteristic in the active power and DC voltage relationship (Pac–Udc) curve. However, operating the droop control as an extension of the Udc control mode with a steep slope was found to be difficult since it introduces instabilities. This also happens in the extended Pac control with a shallow slope. This paper proposes a droop line tracking (DLT) method for mitigating these issues, i.e. by calculating the new operating point of the converter based on the displacement distance from the droop line. The simulation results show that the proposed method enables the converter to operate in different control modes by simply changing the droop line characteristic. Furthermore, the same concept can be extended to implement the advanced droop control, i.e. represented by a multi-slope droop line characteristic such that the converter can be operated in different control modes depending on the DC system disturbance level. Simulation using a three-terminal HVDC system with an offshore wind farm (OWF) station has been performed to demonstrate the functionality of the proposed method in realizing the advanced droop control mode.

KW - DC voltage control

KW - Distributed control

KW - Displacement control

KW - Droop control

KW - HVDC transmission

KW - Multi-terminal HVDC (MTDC)

KW - Voltage-sourced converter (VSC)

U2 - 10.1016/j.epsr.2019.106055

DO - 10.1016/j.epsr.2019.106055

M3 - Journal article

VL - 179

JO - Electric Power Systems Research

JF - Electric Power Systems Research

SN - 0378-7796

ER -