A Coordinating Control for Hybrid HVdc Systems in Weak Grid

Research output: Contribution to journalArticle

Abstract

A coordinating control strategy is proposed for a hybrid high voltage dc (HVdc) system comprising a capacitor commutated converter connected in series with a two-stage voltage source converter called "Vernier." This approach ensures that 1) the tap changers and switched capacitor banks are eliminated by Vernier controls that maintain constant firing angle and margin angle at the rectifier and inverter, respectively, and provide volt-VAr control at the commutation bus, and 2) improves the power flow recovery and risk of commutation failure following sever faults. To that end, a detailed switched model of hybrid-HVdc is built in EMTDC/PSCAD platform. For the frequency-domain analysis, a new nonlinear state-space averaged model is also developed and benchmarked against the detailed model. The steady-state operating characteristics of the proposed hybrid HVdc system are established. Finally, the effectiveness of the proposed approach is demonstrated for weak ac systems interfacing the rectifier and inverter sides. Improvement in commutation failure and power flow recovery following severe disturbances are also shown through case studies.

Original languageEnglish (US)
Article number8608004
Pages (from-to)8284-8295
Number of pages12
JournalIEEE Transactions on Industrial Electronics
Volume66
Issue number11
DOIs
StatePublished - Nov 1 2019

Fingerprint

Electric commutation
Electric potential
Capacitors
Recovery
Frequency domain analysis

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Cite this

@article{0a37aa0e8b404086b78ce19217fbb4b1,
title = "A Coordinating Control for Hybrid HVdc Systems in Weak Grid",
abstract = "A coordinating control strategy is proposed for a hybrid high voltage dc (HVdc) system comprising a capacitor commutated converter connected in series with a two-stage voltage source converter called {"}Vernier.{"} This approach ensures that 1) the tap changers and switched capacitor banks are eliminated by Vernier controls that maintain constant firing angle and margin angle at the rectifier and inverter, respectively, and provide volt-VAr control at the commutation bus, and 2) improves the power flow recovery and risk of commutation failure following sever faults. To that end, a detailed switched model of hybrid-HVdc is built in EMTDC/PSCAD platform. For the frequency-domain analysis, a new nonlinear state-space averaged model is also developed and benchmarked against the detailed model. The steady-state operating characteristics of the proposed hybrid HVdc system are established. Finally, the effectiveness of the proposed approach is demonstrated for weak ac systems interfacing the rectifier and inverter sides. Improvement in commutation failure and power flow recovery following severe disturbances are also shown through case studies.",
author = "Jagdeep Kaur and Chaudhuri, {Nilanjan Ray}",
year = "2019",
month = "11",
day = "1",
doi = "10.1109/TIE.2018.2890496",
language = "English (US)",
volume = "66",
pages = "8284--8295",
journal = "IEEE Transactions on Industrial Electronics",
issn = "0278-0046",
publisher = "IEEE Industrial Electronics Society",
number = "11",

}

A Coordinating Control for Hybrid HVdc Systems in Weak Grid. / Kaur, Jagdeep; Chaudhuri, Nilanjan Ray.

In: IEEE Transactions on Industrial Electronics, Vol. 66, No. 11, 8608004, 01.11.2019, p. 8284-8295.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A Coordinating Control for Hybrid HVdc Systems in Weak Grid

AU - Kaur, Jagdeep

AU - Chaudhuri, Nilanjan Ray

PY - 2019/11/1

Y1 - 2019/11/1

N2 - A coordinating control strategy is proposed for a hybrid high voltage dc (HVdc) system comprising a capacitor commutated converter connected in series with a two-stage voltage source converter called "Vernier." This approach ensures that 1) the tap changers and switched capacitor banks are eliminated by Vernier controls that maintain constant firing angle and margin angle at the rectifier and inverter, respectively, and provide volt-VAr control at the commutation bus, and 2) improves the power flow recovery and risk of commutation failure following sever faults. To that end, a detailed switched model of hybrid-HVdc is built in EMTDC/PSCAD platform. For the frequency-domain analysis, a new nonlinear state-space averaged model is also developed and benchmarked against the detailed model. The steady-state operating characteristics of the proposed hybrid HVdc system are established. Finally, the effectiveness of the proposed approach is demonstrated for weak ac systems interfacing the rectifier and inverter sides. Improvement in commutation failure and power flow recovery following severe disturbances are also shown through case studies.

AB - A coordinating control strategy is proposed for a hybrid high voltage dc (HVdc) system comprising a capacitor commutated converter connected in series with a two-stage voltage source converter called "Vernier." This approach ensures that 1) the tap changers and switched capacitor banks are eliminated by Vernier controls that maintain constant firing angle and margin angle at the rectifier and inverter, respectively, and provide volt-VAr control at the commutation bus, and 2) improves the power flow recovery and risk of commutation failure following sever faults. To that end, a detailed switched model of hybrid-HVdc is built in EMTDC/PSCAD platform. For the frequency-domain analysis, a new nonlinear state-space averaged model is also developed and benchmarked against the detailed model. The steady-state operating characteristics of the proposed hybrid HVdc system are established. Finally, the effectiveness of the proposed approach is demonstrated for weak ac systems interfacing the rectifier and inverter sides. Improvement in commutation failure and power flow recovery following severe disturbances are also shown through case studies.

UR - http://www.scopus.com/inward/record.url?scp=85068639268&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85068639268&partnerID=8YFLogxK

U2 - 10.1109/TIE.2018.2890496

DO - 10.1109/TIE.2018.2890496

M3 - Article

VL - 66

SP - 8284

EP - 8295

JO - IEEE Transactions on Industrial Electronics

JF - IEEE Transactions on Industrial Electronics

SN - 0278-0046

IS - 11

M1 - 8608004

ER -