变电站系统过电压防护技术--中英文翻译

英文文献

Substation system over-voltage protection technology

Second substation equipment over-voltage 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 over-voltage surge protectors of the current step by step into the land of China, Substation secondary safety equipment and reliable operation.

1second over-voltage substation protection

In recent years,the substation communications,communications systems,protection systems, background management module frequent over-voltage damage,the main reason for this is weak and its related systems products over-voltage protection level is weak,or no guard against over-voltage 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 communication systems in the substation weak secondary by the wider use of such electronic systems(equipment)components 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 over-voltage tolerance is low. When thunder and lightning,such as over-voltage and accompanied by the electromagnetic fields reach a certain threshold,ranging from system failure caused,resulted in heavy equipment or permanent damage to its components.Despite the thunder and lightning viewpoint of electronic systems(equipment)is unlikely, but lightning strike near the land,buildings,communication and air supply line directly Leiyun discharge form,or because of electrostatic induction and the impact of electromagnetic induction formation of over-voltage,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 become the urgent need to solve the problem.

2over-voltage protection design

IEC(International Electrotechnical Commission)TC/81mine technical committee 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 over-voltage damage caused by invasive equipment.A comprehensive mine and over-voltage protection systems must be integrated use of discharge(segregation), both pressure(and other potential),shielding(isolation),grounded,limit pressure(clamp)protection,and