First, the system overview
The automatic telecontrol information commissioning of the substation is a necessary operation to be completed before the new substation is put into operation, and it is necessary to debug it after the opening of the supporting optical fiber channel of the substation in the past.
In recent years, due to the severe obstruction of the erection of infrastructure lines, the new substation was only opened to the fiber optic channel a few days before it was put into operation, leaving the debugging time of automatic telecontrol information extremely urgent. Therefore, the relevant communication, automation, protection and commissioning personnel need to work overtime overnight, once the commissioning is not smooth, it will affect the progress of infrastructure production. Together, due to the tight time and high pressure, many residual problems will occur, bringing potential safety hazards. It is particularly urgent to open the temporary debugging channel between the main station and the new substation according to the public network, and the telecontrol communication security gateway equipment brings a useful way to solve the problem.
Second, the system is depicted
The telecontrol temporary commissioning channel system includes 1 set of master station security gateway and 1 set of substation security gateway, and the equipment is installed in the main station room of the dispatching system and the main control room of the new substation respectively.
The data communication process is as follows: the substation telecommunication host is connected to the substation security gateway through the serial port or network, and the security gateway authenticates the data according to the power dispatching digital certificate, encrypts the protocol and sends it to the master station security gateway through the GPRS network, and then carries out identity authentication, protocol encapsulation and decryption, security isolation and other methods for the data, and then connects with the pre-communication system of the EMS system of the main station through the serial port or network.
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