發(fā)布時間：2018-01-24 08:15

  本文關鍵詞： 變電站 微機保護系統(tǒng) 差動保護 二次諧波制動　出處：《太原科技大學》2014年碩士論文　論文類型：學位論文

【摘要】：微機保護系統(tǒng)是現(xiàn)代化變電站二次系統(tǒng)的重要組成部分，是變電站實現(xiàn)綜合自動化的前提。35kV電壓等級的煤礦變電站，是煤礦供電的主力，在煤礦電網(wǎng)中占據(jù)重要地位，并且煤礦是一級負荷，其供電的可靠性對安全生產(chǎn)至關重要。隨著大批煤礦舊站的升級改造和新站的投入運行，微機保護系統(tǒng)在35kV煤礦變電站中被廣泛應用，因此加強微機保護系統(tǒng)在煤礦變電站中的應用研究，對于煤礦供電系統(tǒng)的安全、可靠、經(jīng)濟運行等方面有重要的理論和實踐意義。 本文結合李雅莊新建35kV變電站工程，對其微機繼電保護系統(tǒng)和變電站綜合自動化系統(tǒng)進行了研究、設計與實施。首先，根據(jù)李雅莊35kV舊站運行現(xiàn)狀，結合未來發(fā)展的需求，制定了相應的新站升級方案，并對變電站綜合自動化系統(tǒng)進行了設計與選型。其次，對李雅莊變電站繼電保護需求進行了詳細研究與分析。在此基礎上，，確定了變壓器、線路、電容器等主設備的保護功能，并選擇了相應的微機保護裝置。同時，對李雅莊變電站的施工環(huán)境、干擾源以及可能引起微機保護裝置誤動作的因素進行了研究與分析，設計了相應的施工方案。最后，在分析差動保護二次諧波制動原理及判據(jù)基礎上，通過變壓器空投試驗來檢驗二次諧波制動系數(shù)選取的合理性，保證了變壓器差動保護的可靠性。 李雅莊35kV變電站已投入運行。結果表明，系統(tǒng)運行穩(wěn)定，微機保護系統(tǒng)動作正確，變電站綜合自動化系統(tǒng)響應時間、信息刷新速率等各類指標均達到了預期的設計要求。
[Abstract]:Microcomputer protection system is an important part of the secondary system of modern substation. It is the premise of comprehensive automation of substation. 35 kV voltage grade coal mine substation is the main force of coal mine power supply. It occupies an important position in the coal mine power network, and the coal mine is a first class load, the reliability of its power supply is very important to the safety production. With the upgrading of a large number of old coal mine stations and the operation of new stations. The microcomputer protection system is widely used in 35kV coal mine substation, so strengthening the application research of the microcomputer protection system in the coal mine substation is safe and reliable for the coal mine power supply system. Economic operation and other aspects have important theoretical and practical significance. In this paper, the microcomputer relay protection system and the substation integrated automation system are studied, designed and implemented in connection with the new 35kV substation project in Liyazhuang. According to the current operation situation of the 35 kV old station in Liyazhuang, combined with the demand of the future development, the upgrading scheme of the new station is formulated, and the integrated automation system of the substation is designed and selected. Secondly. The requirement of relay protection in Liyazhuang substation is studied and analyzed in detail. On this basis, the protection functions of main equipment such as transformer, line and capacitor are determined, and the corresponding microcomputer protection device is selected. The construction environment of Liyazhuang substation, the interference source and the factors that may cause the misoperation of the microcomputer protection device are studied and analyzed, and the corresponding construction scheme is designed. Based on the analysis of the second harmonic braking principle and criterion of differential protection, the rationality of selecting secondary harmonic braking coefficient is tested by air drop test of transformer, which ensures the reliability of transformer differential protection. Liyazhuang 35kV substation has been put into operation. The results show that the system is stable, the operation of microcomputer protection system is correct, and the response time of substation integrated automation system is correct. Information refresh rate and other indicators are up to the expected design requirements.
【學位授予單位】：太原科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM63;TM774

【參考文獻】

相關期刊論文 前10條

1 畢大強;王祥珩;楊恢宏;王維儉;;變壓器差動保護中電流相位補償方式的分析[J];電力系統(tǒng)自動化;2006年18期

2 李響;劉國偉;馮亞東;李九虎;;新一代控制保護系統(tǒng)通用硬件平臺設計與應用[J];電力系統(tǒng)自動化;2012年14期

3 王帥;卓俊帆;曹祖亮;張雙平;;幾種電力系統(tǒng)微機保護算法淺析[J];電氣開關;2010年03期

4 胡寅;王軍;;變電站綜合自動化微機繼電保護研究[J];電氣開關;2011年02期

5 田國政;譚偉;;微機保護裝置的發(fā)展[J];電網(wǎng)技術;2006年S2期

6 鐘成元;石雪梅;;變電站微機保護裝置抗干擾的幾點外部措施[J];高電壓技術;2007年01期

7 梁志豪;陳少華;;變壓器涌流識別技術的研究現(xiàn)狀及趨勢[J];廣東電力;2013年07期

8 桂洲;何甜;;變電站自動化及智能化發(fā)展方式展望[J];湖北電力;2010年03期

9 周美蘭;王一磊;王健;;改進傅氏算法在輸電線路微機保護中的應用研究[J];黑龍江大學自然科學學報;2010年06期

10 丁泠允;胡晶晶;;變壓器比率差動保護原理及校驗方法[J];繼電器;2007年12期

本文編號：1459583