Hybrid HTS-FCL Configuration With Adaptive Voltage Compensation Capability

Abstract

This paper introduces a new hybrid high-temperature superconducting (HTS) fault current limiter (FCL) for improving the transient response system recovery with minimum utilization of HTS material. The hybrid HTS-FCL comprises a reduced size of HTS material connected in series with multistep braking resistors. The presented hybrid HTS-FCL utilizes the fast quench phenomena of HTS materials to ensure fast current limiting action and the multistep braking resistors to provide an adaptive voltage compensation during voltage dips. This combination of HTS and braking resistors allows the HTS material to recover faster by lowering its operating time, mitigates the issue of slow response in conventional braking resistors, and keeps the system fault level below the maximum limit even during offline recovery of its HTS component. A dynamic model representing the hybrid HTS-FCL is developed in PSCAD/EMTDC using a current-dependent model for the HTS combined with dynamic braking resistors associated with a phase voltage control scheme and an HTS bypass scheme for each phase individually. The proposed configuration is tested in a single-machine-to-infinite-bus test system in response to symmetrical and asymmetrical fault conditions. A comprehensive simulation analysis demonstrated the effective performance of the hybrid HTS-FCL with capability of fast fault current limitation and voltage boosting.Index Terms-Angular stability, dynamic braking resistor hightemperature superconductor, hybrid fault current limiter (FCL), voltage recovery.

Review on FRT solutions for improving transient stability in DFIG‐WTs

“…Hybrid high‐temperature SFCLs (HTS‐FCL) provides fast quench phenomena of HTS materials to ensure fast current limiting action and the multistep braking resistors to provide adaptive voltage compensation during voltage dips as proposed in [44]. They have very fast quenching, high limiting capability, resistive nature, controls faults and enhancing system stability.…”

Transient Stability Augmentation of PV/DFIG/SG-Based Hybrid Power System by Nonlinear Control-Based Variable Resistive FCL

“…Literature shows that coordinated operation of SFCL and SMES is employed at the PCC to enhance the FRT and the power fluctuation minimization purpose of DFIGbased wind farm [30]. Resistor-based SFCL [15], [31] and high-temperature superconducting FCL [32] are placed at the PCC point in order to enhance the transient stability of SGbased single-machine-infinite-bus (SMIB) power system. The Bonneville Power Administration (BPA) installed a BR which can evacuate 1400 MW of fixed power to enhance power system stability [33] and the VR-FCL works with the same principle like BR.…”

Nonlinear Variable Resistor-Based FCL for Fault Ride-Through Performance Enhancement of DFIG-Based Wind Turbines

“…Generally, voltage sags in grid are mainly due to occurring short circuit faults in grid [20,21]. erefore, researchers are studying on mitigating the adverse effects of grid faults on WTs by using FCLs to enhance the FRT performance of WTs [22,23]. erefore, the installation of FCLs is receiving more attention to increase the FRT capability of WTs [24,25].…”