【正文】 壓時，將會反擊到這些自動化設(shè)備的通信接口上，從而使設(shè)備接口電路損壞，因此有必要在這些設(shè)備的接口上加裝 RS232 的浪涌過電壓保護器。安裝位置宜選擇在 UPS 電源進線前端。 安裝位 置：交流母線 (機柜內(nèi) )。根據(jù)雷電防護區(qū)域的劃分原則，變電站內(nèi)二次設(shè)備供電系統(tǒng)感應(yīng)雷電過電壓的防護可以按兩級 (B、 C 級 )來進行分流保護。因此，加強和改進電子系統(tǒng) (設(shè)備 )的防護，盡量減小其遭受雷電等沖擊干擾損害造成的直接損失和間接損失，已成為當(dāng)今亟待解決的問題。s power cord, signal Lines, data lines, and the installation of lightning protection and internal overvoltage devices to prevent lightning sensors, channeling people along the lightning current, voltage counterattack, such as transient voltage surge too transient overvoltage caused by a fault and damaged electronic equipment. Overvoltage surge protection in accordance with its connection mode is divided into two series and parallel, the use of overvoltage surge protection tandem with, there may exist because of signal transmission does not match the causes of transmission of the signal interference, in particular data Communication Interface in the series were overvoltage surge protection in place, will have the normal data munications. Therefore, the data munications access I: I in the series were overvoltage surge protection in place, the transmission of data must be carried out conscientiously check if the data are not normal transmission, it may be due to the reasons do not match the transmission signal Interference, should be replaced to match the overvoltage surge protection for. If the use of overvoltage surge protection for use of parallel, the situation is basically nonexistent, but the connection mode of overvoltage surge protection for higher technical requirements. 3 secondary system overvoltage substation protection points overvoltage electricity system protection Substation installed in the munications dispatch automation systems are used AC power or a DC power supply equipment for the rectification of its links are generally larger capacity filter capacitance, the transient overvoltage shock absorption of a certain extent, the station Lowvoltage transformer side go to feed between the screen using a shielded cable and equipment have a good grounding, the use of modern technology to analyze mine, we must increase the circuit39。隨著綜合自動化系統(tǒng)和通信自動化系統(tǒng)等二次弱電系統(tǒng)在變電站的廣泛應(yīng)用，這類電子系統(tǒng) (設(shè)備 )元器件的集成度愈來愈高，信息存儲量愈來愈大，速度和精度不斷提高，而工作電壓只有幾伏，信息電流僅為微安級，因而對外界干擾極其敏感，特別對雷電等電磁脈沖和過電壓的耐受能力很低。因此，在數(shù)據(jù)通訊接 I： I 中串人浪涌過電壓防護器后，必須對數(shù)據(jù)的傳輸情況進行認真檢查，如發(fā)現(xiàn)數(shù)據(jù)無 法正常傳輸，則有可能是由于不匹配的原因?qū)е聦鬏斝盘柕母蓴_，應(yīng)更換相匹配的浪涌過電壓防護器。 3． 1． 1 第一級防護處理措施 防護位置：據(jù) 1EC1312(雷電電磁脈沖的防護》中的雷電保護區(qū)域的劃分原則。安裝位置宜選擇在綜合自動化屏交流電源空氣開關(guān)處。 3． 4． 1 微機遠動設(shè)備接口過電壓防護 防護位置：由于變電站微機遠動裝置采用分布分散式結(jié)構(gòu)。安裝位置宜選擇在靠近電子電能表的 RS232 端口處。 。安裝位置宜選擇在內(nèi)線電話出線端和外線電話的人線端。各單元模塊都裝設(shè)在不同的自動化屏內(nèi)，模塊之間通過 RS232接口或現(xiàn)場總線進行通信。選用型號：選用 (UPS 為單相電源輸入時 )C 級單相電源浪涌過電壓保護器或 (UPS 為三相電源輸入時 )的c 級三相電源浪涌過電壓保護器。在兩根母線上各加裝一個同型號的 B 級三相電源浪涌過電壓保護器。 3 變電站系統(tǒng)過電壓防護 3． 1 站用電系統(tǒng)過電壓防護 安裝在變電站內(nèi)的通信調(diào)度自動化系統(tǒng)大多采用交流電源或直流電源為其設(shè)備供電，在其整流環(huán)節(jié)，一般有較大容量的濾波電容，對瞬態(tài)過電壓沖擊有一定的吸收作用，站用變壓器低壓側(cè)到站用饋電屏之間采用的是屏蔽電纜且設(shè)備都有良好的接地，運用現(xiàn)代防雷技術(shù)來分析，必須增加 回路的分流措施，因為其工作接地、保護接地都與其它電氣設(shè)備采用同一接地裝置，而且設(shè)備都處于 LPZOB 區(qū)，電磁脈沖強度相對較強，在站用變低壓側(cè)雖然有防止線路侵人波的避雷器，但殘壓高，因此在變電站遭受雷擊時，通過線路耦合和地電位升高而造成的反擊過電壓依然存在，而且高壓側(cè)的殘壓高達幾千伏，因此必須對這些調(diào)度自動化設(shè)備的供電回路進行過電壓保護。盡 管雷電直擊電子系統(tǒng) (設(shè)備 )的可能性不大，但是雷擊附近大地、建筑物、交流供電線路和空中雷云放電時直接形成的，或者由于靜電感應(yīng)及電磁感應(yīng)形成的沖擊過電壓，都有可能通過與之相連的電力線路、信號線路或接地系統(tǒng)，通過各種接口，以傳導(dǎo)、耦合、輻射等形式，侵入電子系統(tǒng) (設(shè)備 )并釀成嚴(yán)重的干擾或事故。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 levels of overvoltage surge protectors of the current step by step into the land of China, 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 system