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Model Predictive Control Approach for Bridge-Type Fault Current Limiter in VSC-HVDC System

  • M. Shafiul Alam
  • M. A. AbidoEmail author
  • Z. M. Al-Hamouz
Research Article - Electrical Engineering
  • 77 Downloads

Abstract

Voltage source converter–high-voltage DC (VSC-HVDC) system has number of advantages over traditional line commutated converter HVDC. However, VSC-HVDC system is exposed to high current due to faults having great negative effect on converters. In order to limit fault current to relatively low level, this paper proposes model predictive control (MPC)-based bridge-type fault current limiter (BFCL) for VSC-HVDC system. Fault current limiters are placed with the AC grid sides of VSC-HVDC system. Finite control set MPC is developed for the control of VSC-HVDC system along with BFCL. BFCL controller has been developed to insert resistance and reactance during disturbances. Balanced and unbalanced disturbances are applied to evaluate the effectiveness of proposed BFCL controller so as to limit the fault current and augment transient stability. Real-time digital simulator has been used to conduct simulation works. The performance of the proposed MPC-BFCL is compared with that of series dynamic braking resistor (SDBR). Comparative simulation results show that the proposed MPC-BFCL is superior over SDBR in improving dynamic stability of VSC-HVDC system.

Keywords

Voltage source converter Bridge-type fault current limiter Series dynamic braking resistor Fault current Model predictive control 

Abbreviations

1LG

Single line to ground

2LG

Double line to ground

3LG

Three lines to ground

BFCL

Bridge-type fault current limiter

FCL

Fault current limiter

FRT

Fault ride through

HVDC

High-voltage DC

IGBT

Insulated gate bipolar transistor

LCC

Line commutated converter

MPC

Model predictive control

PCC

Point of common coupling

PI

Proportional integral

PLL

Phase-locked loop

RTDS

Real-time digital simulator

SDBR

Series dynamic braking resistor

SFCL

Superconducting fault current limiter

VSC

Voltage source converter

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Copyright information

© King Fahd University of Petroleum & Minerals 2018

Authors and Affiliations

  • M. Shafiul Alam
    • 1
  • M. A. Abido
    • 1
    Email author
  • Z. M. Al-Hamouz
    • 1
  1. 1.Department of Electrical EngineeringKing Fahd University of Petroleum and MineralsDhahranSaudi Arabia

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