Microgrid differentiated emergency control method and device based on power imbalance level

Abstract

This invention discloses a differentiated emergency control method and device for microgrids based on power imbalance levels, belonging to the field of microgrid emergency control technology. The method collects microgrid operating parameters in real time, dynamically assesses and marks the risk of key equipment disconnection from the grid; combining the operation status of the point of common coupling switch, the switching information of internal equipment in the microgrid, and the system frequency offset, it uses a sequential diagnostic approach to identify and classify the direction and severity of power imbalance events; accordingly, it invokes corresponding control strategies to implement differentiated control. This invention combines multi-source information fusion diagnosis with hierarchical control, enabling targeted control measures based on different emergency conditions, overcoming the problems of existing emergency control methods relying on a single criterion and having a single control method. Without adding additional hardware, it can improve the emergency response capability and safe and stable operation level of microgrids under complex operating conditions, and is suitable for emergency control of microgrids with a high proportion of new energy sources.

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