Influence ofApertures oftheProtection Equipment inPower System onElectromagnetic Shielding Effectiveness underthe Circumstance ofWireless Communications

The wide application of wireless communications solutionsbrings a new radio frequency electromagnetic interference problem to electromagnetic shielding of the protection equipment in power system.The electromagnetic leakage from apertures on case of the device directly influences the EMC performance of the protection equipment. To solvethisproblem, the influence of apertures' shape, number, sizeand arrangementon electromagnetic shielding effectiveness of the protection equipment was studiedin the range of wirelesscommunication frequency byfullwave finiteelement method. Based on this, some improving methods were presented in thispaper.