【正文】 then the secondary overvoltage protection system of planning and design, equipment and ensure the safe and stable operation of power grids. 變電站系統(tǒng)過電壓防護技術(shù) 變電站的過電壓保護是以電子信息系統(tǒng)為保護核心，為被保護設備構(gòu)建一個均壓等電位系統(tǒng)，并通過各級過電壓浪涌保護器逐級把電流泄放入大地，使變電站設備安全和可靠地運行。s segregation measures, because its grounding, protection and other electrical grounding all Grounding devices using the same equipment, and equipment are in a LPZOB, the relative strength of strong electromagic pulse, the station changed to prevent lowpressure side although there are lines intrusive wave arrester, but the residual pressure high, in the substation of lightning, through the line Coupling and the potential rise caused by overvoltage counterattack still exist, and highpressure side of the residual pressure as high as several thousand volts, it is necessary to these scheduling automation equipment for the power supply overvoltage circuit protection. Lightning Protection in accordance with the principle of regional division, substation equipment in the secondary power supply system overvoltage sensors lightning protection may be two (B, C level) for the protection of segregation. Bmine use is generally greater flow capacity of the mine installations, the Lightning could be more casual Liuxie people, to achieve the objective of current limit, overvoltage at the same time will reduce to a certain extent, cmine use With lower residual pressure of the mine installations, you can loop in the remaining scattered lightning Liuxie people, to limit the purpose of overvoltage, overvoltage equipment can be reduced to the level of tolerance. The main power supply system is inhibited lightning protection and operation of the power back to the road and overvoltage surge. According to the substation status of the substation of the second minesensing system and the operation and use of two overvoltage protection. As build more substations in the region more open, relatively strong electromagic strength, power lines and munication cables are very vulnerable to lightning attacks sensors, sensors along the overvoltage power lines and munication lines into one device, which will damage equipment, Therefore, the exchange of firstclass bus to install the power protection (B level) is to ensure the safety of the entire control room, and 80 percent of the overvoltage China, scattered to the earth, play a primary role in the protection, but are still in the exchange of feeder Some of the Blevel power supply voltage and mine the residual pressure increases online and must therefore be important in the exchange of feeder lines (DC charging screen, UPS, etc.) clevel power protection, which would curb overvoltage electrical equipment to backend To the level of tolerance. Protective location: It is 1 EC1312 (LEMP protection in the region of lightning protection principles. Arrester installation should be in different locations at the junction of protected areas, this work, the firstclass protection should be located in the bus exchange. In Two on the bus with the installation of a Bclass models of a threephase power supply voltage surge protector. Install Location: AC bus (cabi). secondclass protection measures to deal with For the more important feeder lines on the exchange of equipment, here for the DC charge screen, the installation of clevel threephase power arrester. As DC charging screen is twoway exchange of electricity supply, so the screen in the DC charge with the installation of two models of clevel threephase power supply overvoltage surge protector. Installation location should choose the DC charge screen open exchange of air power Commissioner Office. integrated automation system overvoltage protection Protective position: Computerbased integrated automation system39。英文文獻 Substation system overvoltage protection technology 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