Simulation and real time analysis of network protection tripping strategy based on behavior trees

Abstract

The collaboration of multi intelligent electronic devices (IEDs) in a protection system can improve the both selectivity and real-time performance of the system. To verify the feasibility and real-time performance of a network trip strategy based on multi protection IEDs, a modeling and real time analysis method of the protection system based on behavior trees is proposed. The model of protection IED and circuit breaker in the network trip strategy is presented; the model of the delay behavior of the wide area network with normal topology is further more presented; using a network tripping strategy as example, the theory completion time of every behavior in the system has been calculated. The validity of our method was verified via three examples; this method can also complete the real-time analysis of isolated faulty components in a protection system under circumstances of line fault, circuit breaker failure, and protection component refuse movement.