Testing method of synchronous coordination for primary station injection and secondary injection of distribution automation system

The invention discloses a testing method of synchronous coordination for primary station injection and secondary injection of a distribution automation system. Basing on a GPS (Global Positioning System) time synchronization technology, protection action trip information of a converting station outlet switch can be injected to a tested distribution automation system primary station from a home-made primary station injection testing platform, the information of voltage and current before and after a fault can be synchronously injected at the positions of other feeder switches from a home-made secondary injection testing device, through the coordination of the protection action trip information and the information of the voltage and the current, an actual fault scene of an electric distribution network can be simulated, a fault processing function of the distribution automation system can be tested, a test without power cut can be realized, the safety for testing is increased, and more fault phenomena of the switch and more complex fault scenes can be simulated by the primary station.