Research On Redundant Technology Of Intelligent Substation Based On RTDS

Intelligent substation is the developmental direction of the modern substation,and it is also the key part of building a strong smart power grid.Intelligent converting station not only needs to serve information collection,measurement,control,protection and calculation as well as detection etc.regular functions,but also has advanced functions like monitoring operational state of devices online,supporting power grid real-time automatic control,intelligent adjustment,online policy analysis and cooperative interaction.Moreover,station correspondence network as nerve system,is tie to which connects all sorts of intelligent high pressure devices within converting station.Hence,one of important research contents for intelligent converting station is redundancy technique of correspondence internet.the accuracy and real-time of information transmission are the key criteria to evaluate the reliability of substation communication network.At present,though IECTC57 technology committee has already put forward Parallel Redundancy Protoco1,High-availability Seamless Redundancy both of which have the characteristics of zero delay and zero packet loss,there still don’t have practical application about the two Redundancy Protocol at home.Therefore,realizing and verifying application of new redundancy technology in intelligent substation engineering is beneficial to improving the reliability of intelligent substation communication network.This thesis is based on the project about high reliability redundancy technology of intelligent substation network of Liaoning Electric Power Research Institute,and studies the application about PRP and HSR in communication network.Aiming at the problem of single port / fiber port of the common device,the thesis put forward adopting Red Box with dual selection mechanism to realize PRP and HSR.And using Hejia intelligent substation engineering as the model,using RTDS(Real Time Digital Simulator)to build a closed loop test platform linked with the secondary equipment to simulate primary system operation of intelligent substation,through the network transmission time,network pressure testing,network switching and network structure anomaly performance testing and doing statistical analysis about characteristics of various running working conditions,protection action under abnormal conditions and messages’ repeat sending.On this basis,massive experiments indicate that the PRP and HSR under the processing mechanism with double picking and receiving redundant box can meet the requirements about internetwork communication,whichguaranteed no packet loss of communication data under dual network path to a large extent and verified the reliability of PRP and HSR under the existing intelligent substation system,providing theory evidence for generalizing redundant network technology of PRP and HSR.