A Collaborative Governance Strategy for Power Quality in AC/DC Distribution Networks Considering the Coupling...

Area of Science:

• Electrical Engineering
• Power Systems Analysis
• Renewable Energy Integration

Background:

• Power quality anomalies propagate in AC-DC distribution networks due to interdependencies.
• Photovoltaic multifunctional grid-connected inverters (PVMFGCI) play a crucial role in grid stability and power quality.
• Existing strategies often lack a holistic approach to regional power quality governance.

Purpose of the Study:

• To develop a collaborative governance strategy for optimizing regional power quality in AC-DC distribution networks.
• To analyze the DC ripple generation mechanism in PVMFGCI systems.
• To establish a resource allocation model for effective power quality management.

Main Methods:

• Dissection of DC ripple generation mechanisms linked to AC voltage harmonics and asymmetry.
• Partitioning of AC-side power quality control regions based on photovoltaic governance resources.
• Development of a collaborative resource allocation model for PVMFGCI, considering governance capabilities and residual capacities.
• MATLAB-based simulation for validation.

Main Results:

• Identified the link between AC voltage issues and DC ripple generation in PVMFGCI.
• Proposed a novel control region partitioning strategy for AC-side power quality.
• Established an effective collaborative resource allocation model for PVMFGCI.
• Validated the proposed approach's effectiveness through simulation.

Conclusions:

• The proposed collaborative governance strategy effectively optimizes regional power quality in AC-DC distribution networks.
• The resource allocation model enhances the utilization of PVMFGCI for power quality improvement.
• This research provides a framework for managing power quality challenges in grids with high renewable energy penetration.