Design And Development Of The Relay Protection Training Assisted System

Protective relaying is of great significance among all the electric engineering technologies. No matter when and where a fault occurs in a power system, protective relaying will speedily and accurately clear the circuit to make sure that other electric devices and the whole power system operate in a safe, reliable, stable and economical way and to minimize the harm and lost caused by the fault. Grasping the principles and skills of protective relaying is a basic requirement for all professional technicians of electric engineering.Protective relaying is a discipline with highly requisition of theory and technology. It involves extensive contents and knowledge objections. Because of its comprehensive characteristic, traditional teaching and training mode is lack of vividness, which cannot fully express the sophisticated principles and processing progress. In order to make up for the shortage of traditional training method and let learners grasp the basic and professional skills of protective relaying, this paper developed and designed a protective relaying training and analyzing system, using the programming language of Authorware, Flash, Visual C++ and MATLAB.The system lively combines multimedia technology with protective relaying training course. The Authorware based system is navigated by section page turning and scroll bar tree view for the sake of convenient handling. Besides, a great many animation produced by flash or Authorware is integrated into the system, as well as sound, image, video and text. Learners can study in an easy and funny way as if they were watching TV or a movie show. Teaching and learning is just like entertainment in this way.The system also integrated a protective action demo module programmed by Visual C++ to illustrate the processing progress. After emulating power system faults with ATP, the fault data was read into the module and then learners can see how the data was processed step by step. The module can demonstrate protection based on three kinds of principles: overcurrent protection, distance protection and pilot protection. In this module, learners can see the change of electric characteristics when a fault occurs. The data processing within each part of protective device can also be observed.To make learners grasp a variety of protective algorithm, this paper also described a computer protection algorithm demo software, which can show detailed disposal of different algorithm.The whole system has been published by China Electric Power Press in the form of compact disk. According to incomplete statistics, more than 30 schools have use this system as their instruction assisted software, and it has received a good reputation from its users.