Background
Increased electrical energy consumption accelerate grid build, more and more electrical grid construction and equipment maintenance under complex terrain conditions require “Smart Grid”. Smart Grid is powerful and need connect a lot of sensors/PLC to monitor electrical infrastructure as high-voltage transmission lines, transformer substation, distribution cabinet, switch cabinet, distribution automation, electrical meter, etc. Voltage, Power and Current data of Smart Grid need to continuously collected and sent to control center by M2M device through cellular network or land line, so as to observing and taking necessary actions if electrical parameter are not within the scheduled limits, improve service and efficiency.