Dispatching plays a crucial role in ensuring the safe and stable operation of the power system. Dispatchers are core talents in managing power system operations. However, due to the continuous development of power grid construction, dispatchers face increasing work pressure, and their knowledge scope becomes more complex. Improving the training effectiveness and efficiency of dispatchers has become a pressing issue. Knowledge graphs provide a new method of representing and reasoning knowledge that can aid dispatchers in better understanding and managing complex dispatching problems. This paper will present the overall framework and construction technology of knowledge graphs, as well as related applications in dispatching training.