Study On The Electromagnetic Interference (EI) Of Secondary System In The Booster Station Of Power Plant And The Protective Measures

With the development of power system, increasing power capacity, voltage rating also will be increased to the computer, microelectronics technology-based automation equipment tends to integrated, intelligent and functional integration, which makes the electromagnetic power system compatibility issues become more prominent.This comprehensive treatment of the electromagnetic compatibility of electronic devices, a more detailed analysis of the interference source, interference of the transmission. And describes effective suppression and prevention measures and the principle of interference.Paper the characteristics of EMC design, EMC design combined with the contents of the source of interference suppression, shielding, filtering, grounding, PCB design, overlap, layout and cable methods and precautions described.According to the stipulated standards for electromagnetic compatibility EMC design is to prevent electromagnetic interference appears as a basic requirement. Electromagnetic environment is changing, to truly achieve the economic and technical compatibility, to ensure that the first and second reliability of equipment operation, must be based on specific circumstances, flexible use of various technologies and measures.The author based on the actual operation, and absorb the experience of a sister unit, summarizes several commonly used measures of EMC technology.Including screening measures to reduce the electrical circuit of the inductive coupling strength, ground and reduce the total impedance coupling, isolation, filtering, computer power supply interference measures.A typical layout for the current secondary system booster station, relay protection and control equipment that is "decentralization", to the booster station analysis of electromagnetic interference, the "decentralization" of the secondary system of anti-jamming measures. Booster station at a power plant protection andcontrol system design using the above results, one year of operation the plant booster station to electromagneticinterference not occurred, indicating the effectiveness of measures against electromagnetic interference.