Research On Key Technologies Of Relay Protection Experimental Simulation Platform Based On C#

Practical training teaching is a direct form of linking theory with practice.It is aimed at the high cost of upgrading and difficult adjustment of the existing hardware experimental platforms in the power system relay protection laboratory,and the long development cycle of software relay protection experimental platforms.The interaction method is relatively abstract,and the experimental interface controls are all graphic symbols of electrical engineering components,which cannot be used to intuitively perform experimental operations and display experimental phenomena.Its important technologies were studied.The experimental platform based on this technical research has low development cost and short cycle,and has a more friendly interactive interface,a complete experimental process,realistic experimental controls and intuitive experimental effects.At the same time,compared with the traditional relay protection experimental platform,it has a lower threshold of software knowledge,and overcomes the problem of a single type of experiment and lack of scalability,and closely meets the needs of relay protection experimental teaching.Taking the typical three-stage current protection experiment in the relay protection experiment as an example,this paper studies some simulation technologies required to realize the experimental simulation platform.The main work is as follows:1.First,through human-computer interaction technology,a complete experimental process is established from experimental preview,experimental analysis,experimental connection to experimental operation and phenomenon observation.Failures are simulated by user interaction instead of changing parameters.2.Secondly,through the self-defined control library technology,analyze the characteristics of relays and electrical components in the experiment,and design a relay protection experimental control that is closer to reality and has feedback function.The experimental phenomenon is shown by simulating the logic action of the control instead of the waveform.3.Then the experimental simulation operation technology is realized by software programming,the circuit function of the experimental device is realized by program editing and interactive control,and the interactive relay protection action logic is realized by the object-oriented programming language.4.Then the paper gives the teaching experiment application example of the three-stage protection experiment simulation platform,and carries out the experimental verification,which proves that the experimental platform has perfect experimental process,friendly human-computer interaction,and intuitive experimental effect,which is suitable for teaching.5.Finally,based on the above simulation technology,an experimental simulation platform for current blocking and voltage quick-break protection is built,and the experimental verification is carried out,which proves that the technology studied in this paper has strong scalability,which can provide guarantee for the subsequent development of the platform.The results show that the simulation platform built on the basis of the simulation technology studied in this paper meets the needs of the experimental teaching of relay protection and can make up for the shortcomings of the traditional experimental methods.