The Research On Anti-interference Of The Microcomputer-based Protection

AbstractThe protection plays an important role in the power system's safe operation. With the invention of microcomputer-based protection, protection device provides much advantage for mount, test, operation, an important base for the modem management of the protection. However, with the exception of the device itself, the operation environment of the power plant and the power substation in which the protection device works has no changes. The harsh electromagnetic environment seriously threatens the microcomputer-based protection. It becomes a serious problem concerned by the engineers and technicians about how to mediate the operation environment with the microcomputer-based protection.With consideration of EMC ,this paper adopts NSG1O25 ?Fast transient/burst interference?generator coordinated with the IEC6 1000-44 standard to simulate the action of the protection device operating in the electromagnetic disturbance environment. By testing, this paper draws some conclusions about raising anti-interference ability of protection device from the test results and the analysis.