Protection of Sensitive Loads in Distribution Systems Using a BSFCL-DVR System

Area of Science:

• Electrical Engineering
• Power Systems
• Superconductivity

Background:

• Distribution systems face challenges with voltage quality and fault currents.
• Existing solutions may not offer integrated protection and voltage regulation.
• Superconducting fault current limiters (SFCLs) and Dynamic Voltage Restorers (DVRs) are key technologies.

Purpose of the Study:

• To present an integrated bridge-type superconducting fault current limiter (BSFCL) and Dynamic Voltage Restorer (DVR) system.
• To improve voltage quality and limit fault currents in distribution systems.
• To propose a unified control strategy for the integrated system.

Main Methods:

• Integration of BSFCL and DVR through a common DC link, forming a BSFCL-DVR system.
• Strategic placement of BSFCL and DVR ports at the feeder's beginning and end, near sensitive loads and the point of common coupling (PCC).
• Design and implementation of a control system for the BSFCL-DVR system.
• Verification of system efficiency using PSCAD/EMTDC simulations.

Main Results:

• The integrated BSFCL-DVR system effectively improves voltage quality.
• The system successfully limits fault currents within distribution networks.
• The proposed control system enhances the performance of the integrated device.
• PSCAD/EMTDC simulations confirm the system's operational efficiency and capabilities.

Conclusions:

• The integrated BSFCL-DVR system offers a viable solution for enhancing power quality and fault current management in distribution systems.
• The unified approach provides enhanced voltage regulation and fault current limitation.
• The study demonstrates the effectiveness of the proposed system through comprehensive simulations.