Abstract:

According to structural characteristics of the coal mine high-voltage grid, we propose an adaptive short-circuit current calculation model based on colored Petri net that includes a network topology self-learning model and a calculation model. The former model includes 10 places and 7 transitions, and the latter model includes 5 places and 4 transitions. According to coding results of the network topology self-learning model, we set the initial state of place information. Then, according to the rules of transitional trigger, the calculation model can complete adaptive short-circuit current calculation of some output switch. Simulation results show that the model can effectively learn the topology relationship of power grid and achieve adaptive short-circuit current calculation of coal mine high-voltage grid. Meanwhile, compared to the adaptive short-circuit calculation algorithm based on the state of interconnection switch, the adaptive short-circuit calculation model based on colored Petri Net can shorten the time needed to complete the short-circuit calculation. Furthermore, when the number of output switch is 72, the time overhead of short-circuit calculation is about 20 times as much as the time overhead in short-circuit calculation algorithm based on the state of interconnection switch.