GPS anti-spoofing technology based on RELAX algorithm in smart grid

Smart grid is established on top of traditional power grid. With the help of the advanced information technology, power scheduling and control can be achieved better in smart grid. Since it depends on precise timing information, most of the operations are equipped with GPS (global positioning system) that can give precise timing with the performance of real-time, continuity and all-day. But GPS is vulnerable to attacks because of its low power and public known data structure, so it is important to protect GPS from all kinds of jamming, which can guarantee the stability of smart grids. In this paper, a GPS anti-spoofing technology based on RELAX (relaxation) algorithm is proposed. In the case where one or more spoofing sources are present and each contains several spoofing signals or a strong one, it can set suitable number of the spoofing sources and configure the detection threshold in order to realize the spoofing detection and mitigation. The technology is very effective and validated through simulation results.