Electromagnetic disturbances disturbed circuit

Thus far, this chapter has detailed 10 years of electromagnetic disturbances in control circuits in Japanese power stations and substations, begiiming in 1990. The collected data have been... 

Ametani, A., H. Motoyama, K. Ohkawara, H. Yamakawa, and N. Sugaoka. 2009. Electromagnetic disturbances of control circuits in power stations and substations experienced in Japan. lET GTD 3(9) 801-815. 

The notion of fault may be derived from the defect, the fault being the cause of the error (e.g. short-circuit, electromagnetic disturbance, design flaw). 

This section has summarized experiences of electromagnetic disturbances of control circuits in Japanese power stations and substations collected for 10 years from 1990, and the collected data have categorized by the cause, the incoming route, disturbed equipments, and elements. Also, the characteristics of disturbances, case studies, the influence of the power system operation, countermeasures, and the costs are presented. 

Electromagnetic interference (EMI) refers to the interaction between electric and magnetic helds and sensitive electronic circuits and devices. EMI is predominantly a high-frequency phenomenon. The mechanism of coupling EMI to sensitive devices is different from that for power frequency disturbances and electrical transients. The mitigation of the effects of EMI requires special techniques, as will be seen later. Radio frequency interference (RFT) is the interaction between conducted or radiated radio frequency helds and sensitive data and communication equipment. It is convenient to include RFI in the category of EMI, but the two phenomena are distinct. 

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