【正文】 本科畢業(yè)設計（論文）中英文對照翻譯院（系部） 專業(yè)名稱 年級班級 學生姓名 指導老師 英文文獻Second substation equipment overvoltage protection on electronic information system for the protection of core equipment for the construction of a protected both pressure and other potential system, and through all levels of overvoltage surge protectors of the current step by step into the land , Substation secondary safety equipment and reliable operation.1 second overvoltage substation protection In recent years, the substation munications, munications systems, protection systems, background management module frequent overvoltage damage, the main reason for this is weak and its related systems products overvoltage protection level is weak, or no guard against overvoltage Technical measures, the consequences for the safe operation of power grids bring about a greater negative impact. With integrated automation systems and automation systems such as munication systems in the substation weak secondary by the wider use of such electronic systems (equipment) ponents of the integrated more and more, the growing volume of information storage, speed and accuracy of the Increased and operates only a few volts, current information only microamp level, thus extremely sensitive to outside interference, especially the lightning and electromagnetic pulse, such as overvoltage tolerance is low. When thunder and lightning, such as overvoltage and acpanied by the electromagnetic fields reach a certain threshold, ranging from system failure caused, resulted in heavy equipment or permanent damage to its ponents. Despite the thunder and lightning viewpoint of electronic systems (equipment) is unlikely, but lightning strike near the land, buildings, munication and air supply line directly Leiyun discharge form, or because of electrostatic induction and the impact of electromagnetic induction formation of overvoltage, There might be connected to the power lines, signal lines or grounding system, through various interfaces to transfer, coupling, radiation and other forms of invasive electronic system (equipment) and lead to serious disturbances or incidents. Therefore, strengthening and improving the electronic system (equipment) protection, to minimize the impact of interference by lightning and other damage caused direct losses and indirect losses, has bee the urgent need to solve the problem.2 overvoltage protection design IEC (International Electrotechnical Commission) TC/81 mine technical mittee will be divided into internal and external mine mine in two parts, the external mine is lightning rod (or with lightning, lightning network), Yin Xiaxian and grounding system, Objects to be protected from direct lightning strikes, mine is to prevent internal lightning and other internal overvoltage damage caused by invasive equipment. A prehensive mine and overvoltage protection systems must be integrated use of discharge (segregation), both pressure (and other potential), shielding (isolation), grounded, limit pressure (clamp) protection, and other technology, in accordance with the external mine And the principle of internal mine, in accordance with the targets of protective features, flexible application to take concrete measures, constitute a plete protection system. Overvoltage substation in the form are: Lightning overvoltage, the resonant frequency overvoltage and overvoltage, overvoltage operation, these overvoltage transmission or electromagnetic induction to the way the lines and equipment on a dangerous overvoltage, in particular, Lightning overvoltage, lightning