本文選題：500kV變電站 + 直流融冰��； 參考：《華北電力大學(xué)》2017年碩士論文

【摘要】：隨著我國經(jīng)濟的快速發(fā)展,電網(wǎng)的總體規(guī)模也在不斷擴大。冬季冰雪天氣導(dǎo)致電力輸電線路覆冰現(xiàn)象所帶來的一系列嚴(yán)重問題得到越來越多的關(guān)注。由于變電站一般難以提供交流短路電流融冰時所需的大量無功功率,因此交流短路電流融冰不適用于500kV及以上的輸電線路,而相對于交流短路電流融冰,直流短路電流融冰的優(yōu)點是其融冰電源容量需求易滿足,有效距離長。研究安全、可靠、經(jīng)濟效益良好的輸電線路融冰方法和實施方案對提高整個安徽電網(wǎng)抵御冰災(zāi)等自然災(zāi)害能力,保證電力系統(tǒng)的安全穩(wěn)定運行以及建設(shè)堅強可靠的安徽電網(wǎng)等具有重要現(xiàn)實意義。本論文在閱讀相關(guān)文獻基礎(chǔ)上,結(jié)合實際工程,提出了500kV官山變電站直流融冰及無功補償技術(shù)應(yīng)用研究項目的設(shè)計方案以及實施方案的整體思路。首先在研究直流融冰基本原理基礎(chǔ)上和了解本項目實際輸電線路現(xiàn)狀的前提下,詳細(xì)分析了官山變電站直流融冰和無功補償?shù)男枨�。其�?根據(jù)需求分析提出設(shè)計工程的整體方案,即制定集成方案、確定網(wǎng)省協(xié)同控制方案以及直流融冰兼動補裝置的調(diào)度狀態(tài)和控制策略。然后,根據(jù)設(shè)計的方案和變電站的基本情況,分析和確定項目的安裝位置。最后,結(jié)合相關(guān)理論和現(xiàn)場運行數(shù)據(jù)對該套裝置在架空輸電線路融冰、無功補償方面的應(yīng)用效果進行分析。結(jié)果表明本文所提方案中動態(tài)無功補償裝置在電網(wǎng)異常故障時能夠充分發(fā)揮作用,且在線路覆冰時,融冰效果良好。500k V官山變直流融冰兼SVC裝置,其利用率高,具有較好的經(jīng)濟性,因而本文所提的方案具有一定的普適性。
[Abstract]:With the rapid development of China's economy, the overall scale of the power grid is also expanding. More and more attention has been paid to a series of serious problems caused by the icing of power transmission lines due to the winter snow and ice weather. Because it is difficult for substations to provide a large amount of reactive power when AC short-circuit current melts ice, AC short-circuit current melting ice is not suitable for 500kV and above transmission lines, but relative to AC short-circuit current for ice-melting. The advantage of DC short-circuit current is that the capacity of ice-melting power supply is easy to meet and the effective distance is long. To study the safe, reliable and economic benefit of ice melting methods and implementation of transmission lines to improve the ability of the whole Anhui power grid to resist natural disasters such as ice disasters, It is of great practical significance to ensure the safe and stable operation of power system and to build a strong and reliable Anhui power grid. On the basis of reading the relevant documents and combining with the actual project, this paper puts forward the design scheme and the overall idea of the project of the application of DC melting ice and reactive power compensation technology in 500kV Guanshan Substation. Firstly, on the basis of studying the basic principle of DC ice-melting and understanding the present situation of actual transmission lines in this project, the requirements of DC ice-melting and reactive power compensation in Guanshan Substation are analyzed in detail. Secondly, according to the requirement analysis, the whole project of the design project is put forward, that is, the integrated scheme is formulated, the coordinated control scheme of the network province and the dispatching state and control strategy of the DC ice-melting and moving compensator are determined. Then, according to the design scheme and the basic situation of the substation, analyze and determine the installation location of the project. Finally, the application effect of the device in ice-melting and reactive power compensation of overhead transmission lines is analyzed based on relevant theory and field operation data. The results show that the dynamic reactive power compensation device proposed in this paper can play a full role in the abnormal fault of the power network, and when the line is icing, the ice melting effect is good. 500kV Guanshan variable DC melting ice and SVC device, its utilization ratio is high. Because of its good economy, the scheme proposed in this paper has a certain universality.
【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM752;TM63;TM714.3

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本文編號：1951627