Study On Centralized Protection Scheme Of Substation Based On Linux Operating System

Traditional substation relay protection device structure is independent protection by function,this stand-alone protection devices hardware configuration repeat,single function,only a single point of information without a global perspective,is a device redundancy the structure of the non-functional redundancy.This limitation is likely to cause a miscarriage of justice of protection,is not conducive to the global optimization of the substation,unable to meet the requirements of increasingly complex power system safe and stable operation.With the popularization and application of electronic transformer,network communication technology development,as well as IEC61850 communication protocol,real-time information and running status of the substation can achieve information sharing high-speed transmission through the network,allowing developers to become a centralized protection system based on information sharing possible.In this paper,the traditional detached protection hardware configuration to repeat,the complexity of the secondary wiring,information can not be shared and the lack of speed and mobility difference is proposed based on embedded Linux operating system,centralized protection program,design the hardware structure and software solutions,and centralized protection algorithm.Linux is an open system,the kernel small,high efficiency,stability,and support a complete network capabilities,a high degree of modular components add it very easy to,so embedded Linux as the operating system of the centralized protection system.Concentrated all the protective function of the substation to a device that can reduce the hardware configuration,to improve the protection of selectivity and speed and mobility.Theoretical analysis shows that centralized protection system in liquid and selective than traditional self-protection.PSCAD-EMTDC simulation software to model,with the relationship of the three-stage current protection,for example,by comparing the analysis of self-protection systems and centralized protection system in a different point of failure when the action time limit,verify the centralized protection selectivity and speed and mobility advantages.In active distribution network static simulation system having a mating between the three-stage current protection a lot of test results verify the advantages of centralized protection program.In this paper,to the Linux operating system as a centralized protection embedded systems,can improve the ability to adapt to change by the protection device on the power grid operation mode,upgrading of traditional substation and the safe operation of an important guiding significance,but also for intelligent The design of the substation to provide a reference.