Design and control of LCC DVR

Area of Science:

• Electrical Engineering
• Power Systems
• Power Quality

Background:

• Utility power quality is crucial, with Dynamic Voltage Restorers (DVRs) being key active compensators in distribution networks.
• Conventional DVRs require high DC voltage and power ratings, limiting their efficiency.
• Voltage sags and swells, both balanced and unbalanced, necessitate effective compensation strategies.

Purpose of the Study:

• To present the design, control, simulation, and hardware implementation of a three-phase 10 kVA LCC DVR.
• To demonstrate the effectiveness of the LCC DVR configuration in reducing DC voltage and inverter power requirements.
• To provide a comparative analysis of the LCC DVR against other existing DVR configurations.

Main Methods:

• Development of a modified DVR topology utilizing an LCC output filter.
• Implementation of an efficient control strategy for the proposed DVR.
• Simulation and hardware testing of a 10 kVA three-phase prototype.
• Comparative performance evaluation with conventional DVR designs.

Main Results:

• The LCC DVR configuration successfully reduces DC voltage and inverter power ratings compared to traditional DVRs.
• The designed DVR effectively compensates for balanced and unbalanced voltage sags and swells.
• Hardware implementation validates the simulation results and demonstrates practical feasibility.
• Comparative analysis highlights the advantages of the LCC DVR in terms of component ratings.

Conclusions:

• The LCC DVR offers a significant improvement over conventional DVRs by reducing component stress and power requirements.
• This configuration provides an efficient and practical solution for enhancing power quality in electrical distribution systems.
• The presented design and control strategy are validated, paving the way for wider adoption of LCC DVR technology.