Study Of Protection Technology About Micro-Electronic Equipment In Transformer Substation

How to achieve EMC in the intricate electromagnetic surroundings in order to guarantee the credibility of systems and equipments have become an important problem in the field of electric power.At first ,the paper analyses the reason of bringing disturbing source, from studying disturbing source,track and body to research elements about disturbing of micro-electronics in transformer substation. In order to study easily, it designs and develops monitor system about disturbing signal, it can record the disturbing signal at the fault condition on line, and all kinds of disturbing signals about micro-electronic in transformer substation. On the base, this paper puts forward the measures of protection which about micro-electronic equipment in transformer station. Analysis all kinds of protection measures, such as the grounding,voltage-sharing,screen,limiting,shunt current,separation an so on .Solve the loss of combustion of microcomputer protect,oscilloscope,data acquisition instrument,data port and communication apparatus. Reduce the occurrence of the malfunction of the equipment which caused by disturbing signal.The paper chiefly illustrates with XingSheng transformer substation, study the encroachment way of inductive thunder and EMC in transformer substation. By evaluating the lighting disturbance risk and combining with the characteristic of the transformer substation, establish a protection scheme"solid defending, integrated regulation, multi ranges of protection". Dividing the transformer station into A,B,C,D grade with the shielded surge range of the power and electronic information system. Improve the grounding for lightening, add the overpressure of AC & DC supply and surge I,II,III grade protect...