本文選題：高壓直流輸電 + 換流閥��； 參考：《華北電力大學》2014年碩士論文

【摘要】：換流閥為換流站的核心設備,其在運行中通過的大電流會產生大量的熱量,會導致晶閘管和電抗器等閥組件元件的溫度上升,這就需要有閥水冷卻系統對換流閥進行冷卻。 本文通過對不同廠家技術的閥水冷系統進行詳細研究,分析其優(yōu)缺點,并對歷史故障進行舉例分析,不僅可以使運維人員對直流輸電閥水冷系統結構有所熟悉,而且對故障發(fā)生時的分析處理提供了可靠經驗和指導方向。通過對各閥水冷技術優(yōu)缺點的比較,達到取長補短的目的。 本文的主要研究內容有： 1、結合ABB和高瀾閥水冷技術特點,介紹閥水冷技術的現狀和基本功能,引出本文研究方向和意義； 2、結合直流換流站現場實際,介紹閥水冷系統硬件組成,重點介紹閥內、外水冷系統主回路各部分硬件回路的功能,并重點對現在常用兩種外冷水水質處理模式原理進行比對分析； 3、以華新換流站和楓涇換流站為例,介紹閥水冷控制系統組成,重點介紹ABB和高瀾閥水冷控制系統的特點并將兩者進行對比分析,進而討論主泵切換邏輯和冷卻塔投切邏輯。 4、結合南橋站和膠東站的工程實際運用,介紹閥水冷保護原理及功能并將兩者進行對比分析。詳細闡述工程中對閥水冷相關保護的規(guī)定和要求,并以高嶺換流站保護定值設置不合理導致直流系統閉鎖為例加以總結。
[Abstract]:The converter valve is the core equipment of the converter station. The large current passing through it will produce a lot of heat, which will cause the temperature of valve components such as thyristor and reactor to rise, which requires the valve water cooling system to cool the converter valve. In this paper, the valve water cooling system of different manufacturers is studied in detail, its advantages and disadvantages are analyzed, and the historical faults are analyzed with examples. The operation and maintenance personnel are not only familiar with the structure of HVDC transmission valve water cooling system. It also provides reliable experience and guidance for the analysis and treatment of faults. By comparing the merits and demerits of each valve water cooling technology, the purpose of complementing each other is achieved. The main contents of this paper are as follows: 1. According to the characteristics of ABB and water cooling technology, the present situation and basic functions of valve water cooling technology are introduced, and the research direction and significance of this paper are introduced. 2. According to the actual situation of DC converter station, the hardware composition of valve water cooling system is introduced, and the function of each part of main circuit of valve water cooling system is introduced emphatically. The principle of two kinds of water quality treatment modes of external cold water is compared and analyzed. 3. Taking Huaxin converter station and Fengjing converter station as examples, the composition of valve water cooling control system is introduced. The characteristics of ABB and high Lan valve water cooling control system are introduced and compared with each other, and the main pump switching logic and cooling tower switching logic are discussed. 4. Combined with the practical application of Nanqiao Station and Jiaodong Station, the principle and function of valve water cooling protection are introduced and compared with each other. The regulations and requirements of valve water cooling related protection in engineering are described in detail, and a conclusion is made with the example that the unreasonable setting of protection setting of Gaoling converter station leads to the locking of DC system.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM721.1

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本文編號：1883770