Application of 3G Technology in Power Quality Monitoring System

At the present time the dedicated wired network is used widely to transfer power quality monitoring data. This transmission mode has some shortcomings, for example, the accessing terminals scope and the bandwidth resources are limited; the investment of the construction and maintenance is larger and the period is long. In view of the advantages of 3G technology, this paper proposed a 3G-based power quality monitoring system communication network, uses the VPN technology based on the L2TP and IPSec combination to build a virtual private monitoring data transmission network channel. Currently the 3G wireless networks is successfully applied in Sichuan power grid unified power quality monitoring system in China as an important supplement to the wired network and the actual field test results prove the reliability and practicality of this solution.