DNP 3 0 protocol applied to power dispatching system of Guangzhou

DNP 3 0 protocol can be applied to supervisory control and data acquisition system (SCADA)as an international standard protocol.Its wide suitability ,however,multiplies the difficulty in understanding,utilization and realization of it. This paper introduces the composition of DNP 3 0 protocol and its application to SCADA system of Guangzhou as well as the problems encountered in the commissioning.