• /  50
  • 下載費用: 19.90積分  

SFSZ11-50000/110電力變壓器的電磁設計本科論文.doc

'SFSZ11-50000/110電力變壓器的電磁設計本科論文.doc'
?SFSZ11-50000/110電力變壓器的電磁設計摘要電力變壓器是發電廠和變電所的主要設備之一。變壓器不僅能升高電壓把電能送到用電地區,還能把電壓降低為各級使用電壓,以滿足用電的需要。在實際應用中,通常通過系統的逐步計算得出所需標準的電力變壓器,而其中的電磁設計是設計的重點部分。此次設計的目的旨在將在校的變壓器的理論的學習與真正的變壓器設計實踐相結合,在系統學習變壓器的結構原理基礎上,通過自己獨立的設計一臺變壓器的電磁計算,了解變壓器設計的主要過程及相關的方法。在設計的過程中不斷學習、消化、掌握變壓器電磁計算的全過程,掌握其計算方法,從而對變壓器有一個深入的了解。 本文針對SFSZ11—50000/110三相三繞組有載調壓電力變壓器進行計算研究,主要內容包括變壓器的現狀與發展趨勢、繞組的相電壓和相電流的計算、變壓器的電路計算、變壓器的磁路計算、變壓器短路阻抗計算、變壓器的絕緣、變壓器溫升計算、變壓器電動力計算、變壓器整體重量計算等。設計過程中,在直徑的選取和線匝的分布上遇到了比較大的問題,使得損耗部分出現了較大的誤差,但是通過反復的驗證與修改得到了理想的數據及結果。在其他設計部分,對于每一參數的選取、每一系數的取值范圍,都經過認真思考,再進行計算。在計算中,也盡量結合工程實際,以及保證誤差在工程上允許的范圍內。計算結果顯示,此電力變壓器為合格產品,各項指標符合任務書要求。關鍵詞 變壓器;電磁計算;短路阻抗;參數The electromagnetic design of SFSZ11—50000/110 power transformerAbstractPower transformer is one of the main equipments in power plant and substation .Transformer can not only increase the voltage and transform electric it to the electric-needed area , but also can reduce a voltage at all levels in order to meet the demand for electricity. In practical application,we usually through a series of calculation to get the required model of power transformer, the key part of the whole design is electromagnetic design. This design means to put the transformer theory from learning and the real transformer design practice together, ,design a transformer electromagnetic part independently on the base of the principle of learning of the system structure of transformer, understand the main transformer design process and related the methods,The process of the whole plan should keep continuous learning, digestive, and finally master transformer electromagnetic design and process, so as to have a deeper understanding of transformer.The following aims at SFSZ11- 50000/110 for calculating and researching, the main contents include the current situation and development trend of transformer, winding phase voltage and phase current calculation, calculation of the transformer circuit, the transformer magnetic circuit calculation, transformer short circuit impedance calculation, transformer insulation, transformer temperature rise calculation, electric power transformer calculation, the overall weight of transformers and so on .In the design process, the selection of the diameter and the winding distribution encountered big problems, make the loss part appeared bigger error, but with the repeated verification and modification we getting the desired data and results. In other parts, for each parameter, the range of each coefficient, first with deep consideration, and then careful calculated .In calculation, in combination with the engineering practice as far as possible, and make the error in the allowed range. The calculation results show, the power transformer is in good qualification, the indicators in line with the assignment request.Keywords power transformer;electromagnetic computing;short-circuit;parameter不要刪除行尾的分節符,此行不會被打印目錄摘要 IAbstract II第1章 緒論 11.1 我國電力變壓器發展及發展趨勢 11.2 我國現階段企業生產變壓器狀況 11.3 變壓器計算的一般程序 21.4 本章小結 3第2。省略部分。calculate the induced voltage across the auxiliary winding but with the following differences. First, the infinitesimal area vector d/A in (1) is associated with the auxiliary winding. Second, a small test current density J is injected into the auxiliary winding. This current has little impact on the vector potential A. Third the current I in (2) is obtained by integrating J over the cross sectional area of the auxiliary winding.Table 1 lists the winding placements that were considered and Fig. 2 shows the associated diagram. A mirror image of the windings exist in the other three quadrants. In one set of simulations, the regulating voltage winding was considered, therefore the tap was in the top position. The other set of simulations assumed that no regulation winding was in operation.3. SIMULATION RESULTSThe magnetic flux density distribution for one quarter of the transformer, under short circuit conditions, is shown in Fig. 3. The voltage induced across the auxiliary winding, as a function of winding placement, under short circuit conditions, and with the regulating winding RV in place is shown in Fig. 4. The optimum placement, placement #6, results in 1 V/turn. The voltage induced with no RV winding in place is shown in Fig. 5. The optimum placement in this case is also placement 6 but the induced voltage is 1.87 Vi t u n This placement is in agreement with the plane in which the flux enclosed by the auxiliary winding in Fig. 3 is minimized. It was also found that the variation in the induced voltage is greater if the winding is moved up, and less if the auxiliary winding is moved towards the geometric centre of the transformer.This induced voltage, added over the 300 turns of the auxiliary winding on three phases, will force a current of about 120 A into the controlled source for a maximum duration of several cycles. This condition requires only a modest overload capability of 4 per unit in the source. If the auxiliary winding were not located so as to be shielded within the delta winding, the induced current would be in the order of 6 kA, destroying both the winding and the dc source.4. .CONCLUSIONSThis paper has shown that the induced voltage appearing across the auxiliary GIC compensating winding on a single phase transformer is affected significantly by its placement. Simulations were performed, under short circuit conditions, with the commercially available software package Magnet5.2. The minimum induced voltage with the regulating winding RV in place is 1 V/him. The minimum induced voltage with no RV winding in place is 1.87 V/turn. It was also found that the induced voltage is greater if the auxiliary winding is moved up from its optimal position, and less if the auxiliary winding is moved towards the geometric centre of the transformer. Locating a modestly-rated auxiliary winding interior to a delta winding is critical for ensuring the survival of both this winding, and the controlled source used to compensate for GIC.
關 鍵 詞:
電力 110 變壓器 電磁 50000 設計 11 本科 sfsz sfsz11
 天天文庫所有資源均是用戶自行上傳分享,僅供網友學習交流,未經上傳用戶書面授權,請勿作他用。
關于本文
本文標題:SFSZ11-50000/110電力變壓器的電磁設計本科論文.doc
鏈接地址: http://www.094347.live/p-55568119.html
關于我們 - 網站聲明 - 網站地圖 - 資源地圖 - 友情鏈接 - 網站客服點擊這里,給天天文庫發消息,QQ:1290478887 - 聯系我們

本站為“文檔C2C交易模式”,即用戶上傳的文檔直接賣給(下載)用戶,本站只是中間服務平臺,本站所有文檔下載所得的收益歸上傳人(含作者)所有【成交的100%(原創)】。本站是網絡服務平臺方,若您的權利被侵害,侵權客服QQ:1290478887 歡迎舉報。

[email protected] 2017-2027 http://www.094347.live 網站版權所有

粵ICP備19057495號 

收起
展開
有没有苹果软件赚钱的 韩国快乐8不开了吗 湖北休彩11选五走势图 七星彩专家杀号最准确 本期一肖一码中特 浙江6+1开奖号码多少啊 腾讯分分彩任选三漏洞 68配资网安全吗 北京11选五5开奖走势图 北京体彩快中彩开奖结果 安徽11选五前三走势图