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繼電保護(hù)選擇的應(yīng)用指導(dǎo)畢業(yè)外文翻譯-其他專業(yè)-wenkub

2023-01-30 02:57:00 本頁面
 

【正文】 me time, improvements are required in the continuity and quality of supply, together with personnel and equipment safety. With these trends in mind, CEE has recently developed the PROSATIN range of equipment, which bines the capabilities of the PROCOM range with that of the MicroSATIN range to provide the plete Integrated Protection, Supervision and Remote Control of Electrical Power Networks. The PROSATIN systems therefore provide full SCADA function for Electrical Power Networks, bining the following functions: ? Protection ? Supervision (Measurements, Alarms, Data Logging and Mimic Diagrams) ? Control (Local or remote by VDU) PROSATIN reduces costs and improves continuity of supply by: ? Reducing the time to check and analyse the power system operational status of parameters, ? Increasing preventative maintenance by automatic and continuous supervision including autodiagnosis, ? Optimisation of energy costs, and ? Improvements in operational procedures and maintenance leading to reduced downtimes. In order to be adaptable to varying degrees of user needs, PROSATIN is available in the following subsystems: ? PS1000: Simple supervisory systems based on desktop PCs intended for use in relatively small electrical works. ? PS2021: SCADA system with time logging for industrial plants and distribution works. ? PS4000: Complete highspeed SCADA system for industrial plants. The selection of protection relays therefore depends upon the answer to two basic questions: a) What are the local protective functions necessary to give the best conditions for the Power System Safety and fault discrimination? b) Will the power system be supervised or controlled in the future? The answer to the second question determines the type choose the classical solid state protection, or the more modern microprocessor controlled digital relays. The answer to the first question determines the selection of protective relay types and their setting ranges. This, together with the power system behaviour (under both steady state and transient conditions) is the subject of this guide. Note that the PROSATIN modular architecture enables a gradual stepbystep implementation of a full supervisory system. The PROCOM protection range can be easily integrated into an existing installation while the measuring units, the local PLCs and the data loggers are installed in stages, taking into account the existing system. 2. HIGH VOLTAGE INDUSTRIAL amp。 保護(hù)設(shè)備的選擇 是基于以下幾點原則: ? 保證供電能供應(yīng)的 質(zhì)量和連續(xù)性(短路判斷、特別是方向保護(hù),自動傳輸和 快速清除 時間的提高 /保障系統(tǒng)的穩(wěn)定性) ? 保護(hù)人員和 設(shè)備的安全(能夠敏感的察覺到變化,并有所反應(yīng)) 。 最近幾年,隨著 微控制器在繼電保護(hù)上的應(yīng)用和發(fā)展,繼電保護(hù)呈現(xiàn)出以下趨勢: ? 繼電器能夠處理更多有用的數(shù)據(jù) ? 電量 和諧波的計算 的計算越來越簡單 ? 與遠(yuǎn)方終端的數(shù)字信息 交換的安全和可靠性提高 ? 通過自身監(jiān)控和自動故障保護(hù)的智能功能對繼電保護(hù)裝置進(jìn)行不斷的監(jiān)控掃描。 現(xiàn)今 ,在經(jīng)濟(jì)環(huán)境較為困難的背景下,通過減少運營和維護(hù)費用來實現(xiàn)效率的增長。 PROSATIN 系統(tǒng)因此為電力系統(tǒng)網(wǎng)絡(luò)提供了全數(shù)據(jù)采集功能,主要 功能有以下幾個部分 組成 : ? 保護(hù)功能 ? 監(jiān)管功能(測量、預(yù)警、數(shù)據(jù)邏輯和圖表模擬 等) ? 控制功能 PROSATIN 通過以下支持來實現(xiàn)降低成本和提高供電可靠性: ? 減少檢測時間和運行模型參數(shù)的分析 ? 通過連續(xù)的自動的監(jiān)控系統(tǒng) 包括自我診斷 來增加設(shè)備的 自動 維護(hù) ? 優(yōu)化能源損耗 ? 提高運行過程的 性能并且減少設(shè)備維護(hù)時間 為了滿足廣大使用 者 的需求, PROSATIN 系統(tǒng)還能 有 以下的輔助系統(tǒng): ? PS1000:基于計算機(jī)界面的簡單監(jiān)控畫面讓界面操作更為簡單 ? PS2021: 隨生產(chǎn)計劃和網(wǎng)絡(luò)分配按時間采集數(shù)據(jù)的數(shù)據(jù)采集系統(tǒng) ? PS4000:為生產(chǎn)計劃而服務(wù)的高速數(shù)據(jù)采集系統(tǒng) 因此繼電保護(hù)部分主要有以下兩個問題來決定: ( a) 本地 繼電保護(hù) 系統(tǒng)需要配置什么樣的 功能才能更好的判斷電力系統(tǒng)的正常和非正常運行? ( b)在未來,電力系統(tǒng)是否能夠自行監(jiān)管和控制呢? 對第二個問題的答案 決定了繼電保護(hù)類型的設(shè)計 是更多的使用傳統(tǒng) 的固態(tài)模型繼電保護(hù)設(shè)備 ,還是更多的引進(jìn)數(shù)字微控制器模型來實現(xiàn)保護(hù)系統(tǒng)。PROCOM 的保護(hù)范圍也是很容易 安裝在已存在的測量單元上的,比如本地的PLC 設(shè)備上。 ? RMS 和 RMSA 繼電器是基于微處理器的繼電器 , 是使用原始的方法分析輸入電流信號 ,以及 快速傅里葉變換。 相間短路保護(hù)分析 過電流保護(hù) 是 電力系統(tǒng)網(wǎng)絡(luò)中 使用最基本的 保護(hù) 之一 。 時滯過電流繼電器本身 就具有 時間選擇性。這是設(shè)置高于二次短路水平和變壓器 脈動 電流 ,然后允許將上
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