Source-Storage-Load Coordinated Master-Slave Control Strategy for Islanded Microgrid Considering Load Disturbance and...

Area of Science:

• Electrical Engineering
• Power Systems
• Control Theory

Background:

• Islanded microgrids face stability challenges with sudden load disturbances.
• Existing peer-to-peer control models have limited regulation range and require generation margins.
• Voltage and frequency deviations can compromise microgrid operational security.

Purpose of the Study:

• To propose a coordinated master-slave control strategy for islanded microgrids.
• To enhance voltage and frequency stability under sudden load changes.
• To improve resource utilization and supply-demand balance.

Main Methods:

• A source-storage-load coordinated control strategy based on 'ramping speed' ratio.
• A channel planning method for robust internal network communication.
• Sliding-mode control and small-signal modeling for disturbance suppression and stability analysis.

Main Results:

• The proposed strategy ensures system voltage and frequency stability through a stable master resource output.
• It effectively restores supply-demand balance by fully utilizing power supply capacity.
• Case studies verified the strategy's effectiveness in improving operational security and communication reliability.

Conclusions:

• The coordinated master-slave control strategy significantly enhances the stability and reliability of islanded microgrids.
• It addresses limitations of peer-to-peer control by optimizing resource management and communication.
• The method provides a robust solution for maintaining microgrid performance under dynamic conditions.