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Smart Power Restoration Auxiliary Decision-Making

Applications

When the 110kV busbar of a 220kV plant or substation is de-energized, the smart restoration system uses real-time collected information to calculate a restoration path for the de-energized busbar. It fully considers factors such as main transformer current, 220kV busbar voltage, 110kV busbar voltage, station-level automatic transfer switches, line current margins, and data anomalies. The system generates a sequence of switch operations for open-loop or closed-loop control to quickly restore power to the busbar. If the restoration path indicates a current limit violation, it activates the interconnected overload shedding function, considering load priorities, load current magnitudes, and the amount of load that needs to be shed.

Functional Features

Automatically avoids the action time of station-level automatic transfer switches before generating a strategy.
Provides three operating modes—monitoring only, open-loop, and closed-loop—to meet various operational needs.
Strictly follows the process of restoring power first before shedding load, ensuring a logical, clear, and rapid fault handling procedure.
Automatically calculates and ranks the current margins of restoration paths, providing both a preferred and alternative restoration paths.
Automatically searches for power restoration paths based on the topological model, making it suitable for various operating modes.
The system automatically determines if interlocking, energizing, triggering, and operating conditions are met to formulate a restoration strategy. Strategy switches are selected only from a list of predefined alternative switches, ensuring rigorous logic, safety, and reliability.
Busbar restoration units are defined in advance, and alternative restoration switches are set and associated with the monitored 110kV busbar to prevent erroneous operations.