Research on overcurrent protection curve model and control of solid state power controller.

Area of Science:

• Electrical Engineering
• Power Systems
• Control Systems

Background:

• Electrification of advanced equipment is a key trend.
• Solid State Power Controllers (SSPCs) are vital for distribution system safety.
• Inverse time overcurrent protection is essential for SSPC functionality.

Purpose of the Study:

• To develop an innovative inverse time overcurrent protection algorithm for SSPCs.
• To enhance protection accuracy by incorporating thermal dynamics.
• To validate the algorithm's performance through simulation.

Main Methods:

• Theoretical derivation of a novel "heat accumulation" inverse time overcurrent protection algorithm.
• Inclusion of initial environmental temperature and load line heat dissipation factors.
• Simulation and analysis of power consumption across multiple scenarios.

Main Results:

• The proposed algorithm significantly improves protection time accuracy.
• Simulation results confirm the algorithm's correctness and accuracy.
• Demonstrated enhanced performance in various operational scenarios.

Conclusions:

• The "heat accumulation" algorithm offers a new approach for SSPC inverse time overcurrent protection.
• Accurate thermal modeling improves the reliability of power distribution systems.
• This research provides a foundation for more robust SSPC designs.