Smart substation is the foundation of smart grid, is the hub connecting power generation and power consumption, and is an important link of safe and reliable operation of the power grid. With the development of Ethernet technology and the improvement of IEC61850 standard, substation is gradually transforming to digital, networked and standardized, and a complete technical system of intelligent substation is gradually formed. The composition of intelligent substation is mainly through IEC61850 standard.

In the intelligent substation, the fault recorder can quickly find out the cause of the fault and formulate a scheme to eliminate the fault. According to the data file of the device, it can quickly find out the fault location, narrow the scope of investigation, and save a lot of time for troubleshooting. The fault recorder can not only monitor whether the relay protection device has misoperation and refuse to operate, but also check whether the secondary circuit wiring is correct. By recording the actual switching value of the fault recorder, we can detect whether the circuit breaker refuses to move when the fault occurs. Therefore, the fault recorder is an indispensable and important device to improve the safe operation ability of the power station and shorten the time of accident investigation.

It can be seen that if you want to add a fault recorder to the intelligent substation, the user should know whether the equipment has IEC61850 communication protocol when purchasing the fault recorder. Only with IEC61850 communication protocol can the fault recorder be applied to the intelligent substation.