Based On The Transient Respond And Security Research About Intelligent Substation Communication Network

Smart grid is a important link about development and construction, which can achieve low carbon loss, sustainable development with society and economy. As an important part of the smart grid, Intelligent substation is the hub of power transmission,which is the important manner about new energy(solar energy, etc) accessing power grid.With the development of science and technology, smart substation is quickly universal,which became more complicated and modernization. So the higher requirement is put forward about the real time and security intelligent substation communication.Researching on real time performance of Substation, this paper is mainly using manners about VLAN virtual network partition and priority label technology. Crossing network data transmission can be reduced by the method which the similar character equipment is distributed with the same virtual network. Then this paper will detailed analysis the VLAN virtual network partition and priority label technology. In the same time, the star and ring topological structure is simulated by OPNET MODELER.Simulation results show that rational division of VLAN can reduce network delay in Substation, inhibit the spread of broadcast information, and improve the real-time performance about entire intelligent substation communication network.This treatise point at intelligent substation security. Through compared with others,obeying the IEC62351 standard, using secure transport layer protocol and virtual local area network technology ensure communication security in substations. Experiment shows as follows, this method can improve the real-time performance of data transmission in substation communication system, which relevant intelligent electronic devices divided into relatively independent virtual local area network by virtual local area network technology. This method can effectively reduce data traffic. Moreover, it can improve transmission security. Then a series of experimental methods are done to measure Communication network of Cangxian power supply company in Hebei Province Cang county power supply company communication network. Through comparison this article verifies the feasibility and necessity.In the end, on the basis of C++ programme DES encryption/ decrypt, Message authentication code MAC is achieved expansion.