臨安市錦城鎮35kV變電站一次設計

電氣工程論文編號:DQ155   論文字數:15652,頁數:40

目 錄
摘要……………………………………………………………………………. . .……………..I
1  前言………………………………………………………………………………………....5
2  錦城鎮35kV變電站設計要求與原始資料……………………………. ............... .6
 2.1  錦城鎮35kV變電站總體概況……………………………………………………....6
 2.2  錦城鎮35kV變電站設計技術要求…………………………………………………12
3  臨安市錦城鎮35kV變電站電氣主接線的設計………………………………… .14
 3.1  錦城鎮變電站35kV主接線概述……………………………………………………14
 3.2  錦城鎮35kV變電站主接線設計原則………………………………………………17
 3.3  錦城鎮35kV變電站變壓器容量與臺數選擇…………………………..…………..17
 3.4  錦城鎮35kV變電站主接線方案設計………………………………………………19
4  臨安市錦城鎮35kV變電站短路計算…………………………………………23
 4.1  短路計算的理論依據與基本方法…………………………………………………...23
 4.2  錦城鎮變電站35kV變電站主要短路計算點的確定…………………………...….23
 4.3  錦城鎮變電站35kV變電站短路計算……………………………………................24
5  臨安市錦城鎮35kV變電站高壓電氣開關設備選擇…………………………….28
 5.1  高壓電氣設備的選擇與校驗原則…………………………………………………...28
 5.2  錦城鎮35kV變電站高壓開關電器選擇與校驗………………………………...….28
 5.2.1  高壓斷路器的選擇與校驗…………………………………………………..28
 5.2.2  高壓熔斷器的選擇與校驗…………………………………………………. 31
 5.2.3  高壓電壓互感器的選擇……………………………………………………..31
 5.2.4  高壓電流互感器的選擇……………………………………………………..32
6  臨安市錦城鎮35kV變電站接地與防雷設計……………………………………...33
 6.1  錦城鎮35kV變電站公共接地裝置的設計………………………………………....33
 6.1.1  接地電阻的要求……………………………………………………………..33
 6.1.2  接地裝置的設計……………………………………………………………..33
 6.2  錦城鎮35kV變電站的防雷保護…………………………………………. ………..34
 6.2.1  電力線路的防雷措施………………………………………………………..34
 6.2.2  變配電所的防雷措施………………………………………………………..35
 6.2.3  雷電侵入波的防護…………………………………………………………..37
7 總結…………………………………………………………………………………………..38
致謝……………………………………………………………………………………………..39

摘  要

 變電站是電力系統中不可缺少的重要環節，它擔負著電能轉換和電能重新分配的重要任務。在電力系統中變電站變換電壓、接受和分配電能、控制電力的流向和調整電壓的電力設施，它通過其變壓器將各級電壓的電網聯系起來。在我國，35kV變電站分布廣泛，是居民用電、工業用電的保證。35kV變電站的可靠運行，直接關系著工農業生產、人民生活、社會進步。隨著經濟的不斷發展，特別是近幾年房地產的開發，供電負荷猛增。時值國家“城、農網”即“兩網”改造工程，為保證安全、優質、經濟供電，更好地為地區經濟服務， 35KV變電所的改造設計對于確保電網安全、穩定運行，提高供電質量和供電可靠性有著至關重要的作用。
 本文在查得系統與線路及所有負荷的參數的基礎上，分析國內外35kV的現狀及發展趨勢。并通過對負荷資料以及線路發展趨勢的分析，從安全，經濟及可靠性方面考慮，對臨安市錦城鎮35kV變電站進行了一次線路的設計，編制了設計說明書并繪制了臨安市錦城鎮35kV變電站主接線圖。

關鍵詞： 供電設計，變電站設計，一次電路設計
Abstract

Power System Substation is an important part of an indispensable, it bears a power conversion and energy redistribution of the important tasks. Substation in power system voltage transformation, acceptance and distribution of electricity, control the power flow and adjust the voltage of the power facilities, it will at all levels through its transformer linked voltage power grid. In our country, 35kV substation widespread is the residents of electricity, industrial electricity guarantee. Reliable operation of the 35kV substation, directly related to the industrial and agricultural production, people's lives, and social progress. With the continuous development of the economy, especially real estate development in recent years, power supply surge load. As the country "City, rural power grid" that is, the "two net" renovation project, in order to ensure safety, quality, economic power, and better services for the regional economy, 35kV substation to ensure that the modified design for the power grid security, stability operations, to improve the quality and supply reliability of power supply has a vital role. In this paper, by searching the load of the system and the line. And information on the load, as well as the development trend line analysis, from security, economic and reliability considerations, the city of Lin'an Jin towns conducted a 35kV substation circuit design, the preparation of the design specification and the mapping of the town of Lin'an JinChen 35kV substation wiring diagram. Key words: power supply design，substation design，primary circuit design