Study and Application of 220kV Substation Relay Protection Training System

Abstract

With the large-scale application of power electronics technology and computer technology in grid operation, automation level of the grid production and operation maintenance in China is increasingly higher, which also proposes higher requirements on the professional theory and skills of frontline staff in grid operation. Relay protection and automation devices are an important part for the safe and stable operation of power grid and also key tools and methods to protect the safety of electrical equipment. Therefore, how to quickly improve the technological level of front-line staff in grid operation and maintenance so that they can meet the needs of automotive and informative development of power grid has become a key obstacle for the safe and stable operation of power grid.At present, theoretical and technical trainingsfor front-line staff of power system operation and maintenance are mainly carried out in the form of regular experts and electricity universities training courses organized by the enterprises, and teaching by certain elder staff at the scene. However, there are certain limitations in the above two training methods in that they cannot meet at the same time the theoretical and practical and technical development needs and that the training results are not always satisfying. Therefore, in order to adapt to the rapid development of power system in China, it is urgent to establish a sound and systematic power system relay protection and automation operation and maintenance personnel training system, which should include basic theory training, practice operation and other cutting-edge power technology overview, so as to make it possible for the frontline staff to learn theoretical knowledge and at the same time have a grasp of the power system development trend and new technologies probably to come. It should ensure that the frontline staff understand and learn new methods for relay protection and automatic detection. Analyzing the Present Status of Relay Protection System Professional training for relay protection has been in the mode of single protective device adjustment since 2000, testing the reliability, timeliness and sensitivity of the protection device by adding simulation value on the protective tester, or setting certain artificial defects and anomaliesin the second line on the screen if the training is of greater difficulty. However, this training mode can hardly cover comprehensive experimental programs like complex faults, protection cooperation and secondary circuit fault analysis, which makes the training of greatly unsatisfying and less targeted. Therefore, it is necessary to expand the training content and improve the training quality. With the continuous development of simulation technology, grid simulation technology has been increasingly applied in training as it can make the training more close to the actual scene, provide the trainees a more realistic training environment and get recognition from trainers and trainees. Training system for relay protection is in fact a simulation model of the actual operation situation of power grid, practicing practical operation on the simulation model to study on the changes of amount of electric power in the power system and judgment and countermeasures against faults. Simulation studies of power system in foreign countries began as early as the 1970s, when the United States developed the first thermal power simulation system in the world. Later, the UK and Japan also launched its own first set of power simulation system. In the 1980s,Tsinghua University 4th International Conference on Mechatronics, Materials, Chemistry and Computer Engineering (ICMMCCE 2015) © 2015. The authors Published by Atlantis Press 1745