畢業(yè)設(shè)計(jì)論文的外文翻譯.doc

金陵科技學(xué)院學(xué)士學(xué)位論文 外文參考資料及譯文畢 業(yè) 設(shè) 計(jì)（論 文）外 文 參 考 資 料 及 譯 文譯文題目： Kangle community Power Of Distribution in Yandu Of yancheng 鹽城市鹽都區(qū)康樂小區(qū)配電設(shè)計(jì) 學(xué)生姓名： 陳尚忠 學(xué)號： 0804110437 專業(yè)： 電氣工程及其自動化 所在學(xué)院： 機(jī)電工程學(xué)院 指導(dǎo)教師： 周 洪 職稱： 講 師 2012 年 3 月 3日Power Of community Distribution To DesignABSTRACT: The basic function of the electric power system is to transport the electric power towards customers. The l0kV electric distribution net is a key point that connects the power supply with the electricity using on the industry, business and daily-life. For the electric power, allcostumers expect to pay the lowest price for the highest reliability, but dont consider that its self-contradictory in the co-existence of economy and reliable.To improve the reliability of the power supply network, we must increase the investment cost of the network construction But, if the cost that improve the reliability of the network construction, but the investment on this kind of construction would be worthless if the reducing loss is on the power-off is less than the increasing investment on improving the reliability .Thus we find out a balance point to make the most economic,between the investment and the loss by calculating the investment on power net and the loss brought from power-off.KEYWORDS: power supply and distribution, power distribution reliability，reactive compensation, load distributionThe revolution of electric power system has brought a new big round construction,which is pushing the greater revolution of electric power technique along with the application of new technique and advanced equipment. Especially, the combination of the information technique and electric power technique, to great ex- tent, has improved reliability on electric quality and electric supply. The technical development decreases the cost on electric construction and drives innovation of electric network. On the basis of national and internatio- nal advanced electric knowledge, the dissertation introduces the research hotspot for present electric power sy- etem as following.Firstly, This dissertation introduces the building condition of distribution automation(DA), and brings forward two typical construction modes on DA construction, integrative mode and fission mode .It emphasize the DA structure under the condition of the fission mode and presents the system configuration, the main station scheme, the feeder scheme, the optimized communication scheme etc., which is for DA research reference.Secondly, as for the (DA) trouble measurement, position, isolation and resume, This dissertation analyzes the changes of pressure and current for line problem, gets math equation by educing phase short circuit and problem position under the condition of single-phase and works out equation and several parameter s U& , s I& and e I& table on problem . It brings out optimized isolation and resume plan, realizes auto isolation and network reconstruction, reduces the power off range and time and improves the reliability of electric power supply through problem self- diagnoses and self-analysis. It also introduces software flow and use for problem judgement and sets a model on network reconstruction and computer flow.Thirdly, electricity system state is estimated to be one of the key techniques in DA realization. The dissertation recommends the resolvent of bad measurement data and structure mistake on the ground of describing state estimate way. It also advances a practical test and judging way on topology mistake in state estimate about bad data test and abnormity in state estimate as well as the problem and effect on bad data from state measure to state estimate .As for real time monitor and control problem, the dissertation introduces a new way to solve them by electricity break and exceptional analysis, and the way has been tested in Weifang DA.Fourthly, about the difficulty for building the model of load forecasting, big parameter scatter limit and something concerned, the dissertation introduces some parameters, eg. weather factor, date type and social environment effect based on analysis of routine load forecasting and means. It presents the way for electricity load forecasting founded on neural network(ANN),which has been tested its validity by example and made to be good practical effect.Fifthly, concerning the lack of concordant wave on preve nting concordant wave and non-power compensation and non-continuity on compensation, there is a topology structure of PWM main circuit and nonpower theory on active filter the waves technique and builds flat proof on the ground of Saber Designer and proves to be practical. Meanwhile, it analyzes and designs the way of non-power need of electric network tre- nds and decreasing line loss combined with DA, which have been tested its objective economic benefit throu- gh counting example.Sixthly, not only do the dissertation design a way founded on the magrginal electric price fitted to our present national electric power market with regards to future trends of electric power market in China and fair trade under the government surveillance, that is group competitio n in short-term trade under the way of grouped price and quantity harmony, but also puts forward combination arithmetic, math model of trading plan and safty economical restriction. It can solve the original contradiction between medium and long term contract price and short term competitive price with improvement on competitive percentage and cut down the unfair income difference of electric factory, at the same time, it can optimize the electric limit for all electric factories and reduce the total purchase charge of electric power from burthen curve of whole electric market network.The distribution network is an important link among the power system. Its neutral grounding mode and operation connects security and stability of the power system directly. At the same time, the problem about neutral grounding is associated with national conditions, natural environment, device fabrication and operation. For example, the activity situation of the thunder and lightning, insulating structure and the peripheral interference will influence the choice of neutral grounding mode Conversely, neutral grounding mode affects design, operation, debugs and developing. Generally in the system higher in grade in the voltage, the insulating expenses account for more sizable proportion at the total price of the equipment. It is very remarkable to bring the economic benefits by reducing the insulating level. Usually such system adopt the neutral directly grounding and adopt the autoreclosing to guarantee power supply reliability. On the contrary, the system which is lower in the voltage adopts neutral none grounding to raise power supply reliability. So it is an important subject to make use of new- type earth device to apply to the distribution network under considering the situation in such factors of various fields as power supply reliability, safety factor, over-voltage factor, the choice of relay protection, investment cost, etc.The main work of this paper is to research and choice the neutral grounding mode of the l0kV distribution network. The neutral grounding mode of the l0kV network mainly adopts none grounding, grounding by arc suppressing coil, grounding by reactance grounding and directly grounding. The best grounding mode is confirmed through the technology comparison. It can help the network run in safety and limit the earth electric arc by using auto-tracking compensate device and using the line protection with the detection of the sensitive small ground current. The paper introduces and analyzes the characteristic of all kind of grounding modes about l0kV network at first. With the comparison with technological and economy, the conclusion is drawn that the improved arc suppressing coil grounding mode shows a very big development potential.Then, this paper researches and introduces some operation characteristics of the arc suppressing coil grounding mode of the l0kV distribution network. And then the paper put emphasis on how to extinguish the earth electric arc effectively by utilizing the resonance principle. This paper combines the development of domestic and international technology and innovative achievement, and introduces the computer earth protection and autotracking compensate device. It proves that the improved arc suppressing coil grounding mode have better operation characteristics in power supply reliability, personal security, security of equipment and interference of communication. The application of the arc suppressing coil grounding mode is also researched in this paper.Finally, the paper summarizes this topic research. As a result of the domination of the arc suppressing coil grounding mode, it should be more popularized and applied in the distribution network in the future.The way of thinking, project and conclusions in this thesis have effect on the research to choose the neutral grounding mode not only in I0kV distribution network but also in other power system.The basic function of the electric power system is to transport the electric power towards customers. The l0kV electric distribution net is a key point that connects the power supply with the electricity using on the industry, business and daily-life. For the electric power, all costumers expect to pay the lowest price for the highest reliability, but dont consider that its self-contradictory in the co-existence of economy and reliable. To improve the reliability of the power supply network, we must increase the investment cost of the network con- struction But, if the cost that improve the reliability of the network construction, but the investment on this kind of construction would be worthless if the reducing loss is on the power-off is less than the increasing investment on improving the reliability .Thus we find out a balance point to make the most economic, between the investment and the loss by calculating the investment on power net and the loss brought from power-off. The thesis analyses on the economic and the reliable of the various line modes, according to the characteristics various line modes existed in the electric distribution net in foshan.First, the thesis introduces as the different line modes in the l0kV electric distribution net and in some foreign countries. Making it clear tow to conduct analyzing on the line mode of the electric distribution net, and telling us how important and necessary that analyses are.Second, it turns to the necessity of calculating the number of optimization subsection, elaborating how it influences on the economy and reliability. Then by building up the calculation mode of the number of optimization subsection it introduces different power supply projects on the different line modes in brief. Third, it carries on the calculation and analyses towards the reliability and economy of the different line modes of electric distribution net, describing drafts according by the calculation. Then it makes analysis and discussion on the number of optimization subsection.At last, the article make conclusion on the economy and reliability of different line modes, as well as, its application situation. Accordion to the actual circumstance, the thesis puts forward the beneficial suggestion on the programming and construction of the l0kV electric distribution net in all areas in foshan. Providing the basic theories and beneficial guideline for the programming design of the lOkV electric distribution net and building up a solid net, reasonable layout, qualified safe and efficiently-worked electric distribution net.References 1 Wencheng Su. Factories power supply M. Machinery Industry Publishing House. 1999.92 Jiecai Liu. Factories power supply design guidance M. Machinery Industry Publishing House.1999.123 Power supply and distribution system design specificationsS.China plans Press. 19964 Low-voltage distribution design specifications S.China plans Press. 1996.6譯文:小區(qū)配電設(shè)計(jì)摘要：電力系統(tǒng)的基本功能是向用戶輸送電能。lOkV配電網(wǎng)是連接供電電源與工業(yè)、商業(yè)及生活用電的樞紐，其網(wǎng)絡(luò)龐大及復(fù)雜。對于所有用戶都期望以最低的價(jià)格買到具有高度可靠性的電能。然而，經(jīng)濟(jì)性與可靠性這兩個(gè)因素是互相矛盾的。要提高供電網(wǎng)絡(luò)的可靠性就必須增加網(wǎng)絡(luò)建設(shè)投資成本。但是，如果提高可靠性使用戶停電損失的降低小于用于提高可靠性所增加的投資，那么這種建設(shè)投資就沒有價(jià)值了。通過計(jì)算電網(wǎng)的投資和用戶停電的損失，最終可找到一個(gè)平衡點(diǎn)，使投資和損失的綜合經(jīng)濟(jì)性最優(yōu)。關(guān)鍵詞：供配電，供電可靠性，無功補(bǔ)償，負(fù)荷分配1 引言電力體制的改革引發(fā)了新一輪大規(guī)模的電力建設(shè)熱潮從而極大地推動了電力技術(shù)革命新技術(shù)新設(shè)備的開發(fā)與應(yīng)用日新月異特別是信息技術(shù)與電力技術(shù)的結(jié)合在很大程度上提高了電能質(zhì)量和電力供應(yīng)的可靠性由于技術(shù)的發(fā)展又降低了電力建設(shè)的成本進(jìn)而推動了電網(wǎng)設(shè)備的更新?lián)Q代本文就是以此為契機(jī)以國內(nèi)外配電自動化中一些前沿問題為內(nèi)容以配電自動化建設(shè)為背景對當(dāng)前電力系統(tǒng)的熱點(diǎn)技術(shù)進(jìn)行一些較深入的探討和研究主要完成了如下工作.(1)提出了配電自動化建設(shè)的兩個(gè)典型模式即體化模式和分立化模式側(cè)重分析了分立模式下的配電自動化系統(tǒng)體系結(jié)構(gòu)給出了軟硬件配置主站選擇管理模式最佳通訊方式等是本文研究的前提和實(shí)現(xiàn)平臺.(2)針對配電自動化中故障測量定位與隔離以及供電恢復(fù)這一關(guān)鍵問題分析了線路故障中電壓電流等電量的變化導(dǎo)出了相間短路工況下故障定位的數(shù)學(xué)描述方程并給出了方程的解以及故障情況下幾個(gè)重要參數(shù)s U& s I& e I& 選擇表通過對故障的自動診斷與分析得出了優(yōu)化的隔離和恢復(fù)供電方案自動實(shí)現(xiàn)故障快速隔離與網(wǎng)絡(luò)重構(gòu)減少了用戶停電范圍和時(shí)間有效提高配網(wǎng)供電可靠性文中還給出了故障分段判斷以及網(wǎng)絡(luò)快速重構(gòu)的軟件流程和使用方法.(3)狀態(tài)估計(jì)是實(shí)現(xiàn)配電自動化中關(guān)鍵技術(shù)之一本文在闡述狀態(tài)估計(jì)方法基礎(chǔ)上給出了不良測量數(shù)據(jù)的識別和結(jié)構(gòu)性錯(cuò)誤的識別方法針對狀態(tài)估計(jì)中數(shù)據(jù)對基于殘差的壞數(shù)據(jù)檢測和異常以及狀態(tài)量中壞數(shù)據(jù)對狀態(tài)估計(jì)的影響及存在的問題提出了狀態(tài)估計(jì)中拓?fù)溴e(cuò)誤的一種實(shí)用化檢測和辯識方法針對竊電漏計(jì)電費(fèi)問題獨(dú)創(chuàng)性提出一種通過電量突變和異常分析防止竊電的新方法并在濰坊城區(qū)配電得到驗(yàn)證.(4)針對配電網(wǎng)負(fù)荷預(yù)測建模困難參數(shù)離散度大以及相關(guān)因素多等問題本文在分析常規(guī)負(fù)荷預(yù)測模型及方法基礎(chǔ)上引入了氣象因素日期類型社會環(huán)境影響等參數(shù)給出了基于神經(jīng)網(wǎng)絡(luò)的電力負(fù)荷預(yù)測方法實(shí)例驗(yàn)證了方法的正確性.(5)針對無源濾波在抑制諧波和無功補(bǔ)償方面的不足以及補(bǔ)償度的不連續(xù)性本文提出了一種PWM 主電路拓樸結(jié)構(gòu)和基于無功功率理論的有源濾波方案建立了基于Saber Designer 仿真平臺仿真分析證明了方案的可行性同時(shí)結(jié)合配電自動化技術(shù)對配電網(wǎng)動態(tài)無功優(yōu)化補(bǔ)償和降低線損的方法進(jìn)行了設(shè)計(jì)分析通過實(shí)例計(jì)算驗(yàn)證了其客觀的經(jīng)濟(jì)效益.(6)針對中國電力市場未來的發(fā)展趨勢以及政府監(jiān)管下的電力市場公平交易設(shè)計(jì)了一種適合我國電力市場現(xiàn)狀按照電價(jià)分組電量協(xié)調(diào)分組競價(jià)的短期電力交易模式給出了基于邊際電價(jià)的機(jī)組組合算法制訂交易計(jì)劃的數(shù)學(xué)模型以及安全經(jīng)濟(jì)約束等在競爭比例逐步提高的情況下能夠較好地解決原有中長期合同電價(jià)和短期競爭電價(jià)的矛盾減少電廠不公平的收益差異同時(shí)也可在電力市場全網(wǎng)的負(fù)荷曲線上對所有電廠進(jìn)行限量優(yōu)化減少總的系統(tǒng)購電費(fèi)用.2 配電網(wǎng)分析 配電網(wǎng)是電力系統(tǒng)中的一個(gè)重要環(huán)節(jié)，配電網(wǎng)接地方式和安全運(yùn)行直接關(guān)系到電力系統(tǒng)的安全和穩(wěn)定。而接地方式的選擇，是與本國國情、自然環(huán)境、設(shè)備制造和運(yùn)行水平等有關(guān)的，例如，雷電的活動情況、絕緣結(jié)構(gòu)的設(shè)計(jì)、對周邊的干擾等因素，都會影響中性點(diǎn)接地方式的選擇;反過來，中性點(diǎn)接地方式對電力系統(tǒng)的設(shè)計(jì)、運(yùn)行、調(diào)試以及發(fā)展都有很大影響。一般在電壓等級較高的系統(tǒng)中，絕緣費(fèi)用在設(shè)備總價(jià)格中占相當(dāng)大的比重，降低絕緣水平帶來的經(jīng)濟(jì)效益很顯著，通常就采用中性點(diǎn)直接接地的方式，而采用自動重合閘來保證供電可靠性:相反，在電壓等級較低的系統(tǒng)中，通常都采用中性點(diǎn)不接地的方式來提高供電可靠性。因此，在綜合考慮供電可靠性、安全因素、過電壓因素、繼電保護(hù)的選擇、投資費(fèi)用等各方面因素的情況下，來論證正確選擇配電網(wǎng)接地方式的重要性，以及如何不斷開發(fā)，利用新型接地裝置來應(yīng)用在配電網(wǎng)接地系統(tǒng)中是當(dāng)今配電網(wǎng)接地方式的一個(gè)重要課題。本文主要工作是對lOkV配電網(wǎng)接地方式進(jìn)行研究和比較選擇。分別論述各類接地方式的優(yōu)缺點(diǎn)，主要有國內(nèi)外比較常用的中性點(diǎn)不接地方