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思林水電站通航建筑物機電設備選擇研究

發(fā)布時間:2018-08-29 12:00
【摘要】:近年來,隨著我國“西電東送”工程的建設發(fā)展,我國西部大批航電和水電樞紐工程都已相繼開發(fā)并順利投產發(fā)電。同這些水電樞紐工程配套的水上交通運輸水利工程也隨之逐步啟動,并帶動著國民經濟的逐步發(fā)展。我國西部地區(qū)河流的來水量大多都隨季節(jié)而變化,因河道狹窄,所以,大多水電樞紐工程均為高壩、大庫型,對于河流流域的航運而言,升船機是最適應這類工程的通航建筑物,并在我國具有廣泛的應用前景。本篇論文以位于貴州省東北部思南縣境內的的思林水電站這一烏江流域典型的垂直升船機工程為背景,結合理論計算和其他類似工程的設計理念,著重對垂直升船機機械和電氣設備的選擇進行研究。思林水電站通航建筑物最終采用鋼絲繩卷揚式升船機方案,其主提升設備規(guī)模較大,主要機械設備的設計和制造技術難度大。同時,通航壩段垂直升船機系統(tǒng)對整個供配電系統(tǒng)安全可靠性要求高,對主要電氣設備參數及選型要求苛刻,對能影響到過壩船舶、乘客和貨物安全的照明系統(tǒng)、接地系統(tǒng)以及通信系統(tǒng)等關鍵環(huán)節(jié)的要求也十分嚴格。本篇論文依據貴州省烏江流域航運規(guī)劃的歷史資料,結合國家相關規(guī)程規(guī)定,經分析論證后提出思林水電站通航壩段采用垂直升船機布置方案。在此基礎上,對思林水電站通航建筑物垂直升船機中主要用電設備進行電氣設計和論證,對主要電氣設備進行初步選擇或提出型式選擇和參數選擇的基本要求,確定了垂直升船機的用電負荷為一級重要負荷,為確保供電可靠性,應有3個相對獨立的電源供電,同時應配備獨立的柴油發(fā)電機組作為備用保安電源;主拖動系統(tǒng)采用全數字變頻調速控制技術;垂直升船機配電變壓器的容量應考慮負荷同時率,其阻抗選擇應滿足短路電流計算要求;照明燈具選擇應根據思林水電站通航壩段過往船只的安全照度要求配置,滿足船舶過壩及前方遠距離水域照度要求;接地系統(tǒng)應同整個思林電站主體接地工程聯結成一個整體,接地電阻值應能同時滿足水電站工程和通航建筑物電氣設備的安全接地;通信系統(tǒng)應能滿足全天候氣象條件下的通航船舶的正常安全運行。
[Abstract]:In recent years, with the construction and development of "West-East Power Transmission" project, a large number of avionics and hydropower hub projects in the west of China have been developed and put into production smoothly. The water transportation and water conservancy project, which is matched with these hydropower project, also starts step by step, and drives the national economy to develop step by step. Most rivers in western China vary with the seasons. Because of the narrow channel, most hydropower hub projects are of high dam and large reservoir type. For the navigation of river basin, Ship lift is the most suitable navigable building for this kind of engineering, and has a wide application prospect in China. This thesis is based on the typical vertical ship lift project of Wujiang River basin, which is located in Sinan County, northeast of Guizhou Province, and combines the theoretical calculation with the design idea of other similar projects. Emphasis is placed on the selection of mechanical and electrical equipment for vertical ship lift. Finally, the navigation building of Silin Hydropower Station adopts the scheme of wire rope hoisting ship lift, the main lifting equipment is large in scale, and the design and manufacture of main mechanical equipment is difficult. At the same time, the vertical ship lift system of the navigation dam section requires high safety and reliability of the whole power supply and distribution system, strict requirements for the parameters and selection of the main electrical equipment, and a lighting system that can affect the safety of the ship, passengers and cargo passing the dam. Grounding system and communication system and other key links are also very strict requirements. Based on the historical data of navigation planning in Wujiang River Basin of Guizhou Province and the relevant regulations of the state, this paper puts forward a vertical ship lift arrangement scheme for navigation dam section of Silin Hydropower Station after analysis and demonstration. On this basis, the electrical design and demonstration of the main electrical equipment in the vertical ship lift of the navigable building of Silin Hydropower Station are carried out, and the primary selection of the main electrical equipment or the basic requirements for the type selection and parameter selection are put forward. In order to ensure the reliability of the power supply, there should be three relatively independent power supply, and the independent diesel generator should be equipped as the backup security power supply. The main drive system adopts all-digital frequency conversion speed regulation control technology, the capacity of distribution transformer of vertical ship lift should consider load simultaneous rate, its impedance selection should meet the demand of short-circuit current calculation. The selection of lighting fixtures shall be arranged according to the safety illumination requirements of the passing vessels in the navigation dam section of the Silin Hydropower Station to meet the illumination requirements of the ship passing through the dam and the distant water areas ahead; the grounding system shall be connected into a whole with the whole main grounding project of the Silin Hydropower Station. The grounding resistance value should be able to meet the safety grounding of electrical equipment of hydropower station and navigable buildings, and the communication system should be able to meet the normal and safe operation of navigable ships under all-weather conditions.
【學位授予單位】:清華大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:U642

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