【正文】 結(jié)論本次畢業(yè)是對(duì)紡織廠供配電系統(tǒng)的設(shè)計(jì)，通過完成負(fù)荷計(jì)算 、主接線設(shè)計(jì)、電源進(jìn)線及工廠高壓配電線路的設(shè)計(jì)、短路計(jì)算、高低壓電氣設(shè)備選擇、變電站幾點(diǎn)保護(hù)和防雷接地，使得一個(gè)完成的工廠供配電系統(tǒng)呈現(xiàn)在我們的面前?？偨Y(jié)與體會(huì)經(jīng)過幾周的奮戰(zhàn)我的畢業(yè)設(shè)計(jì)終于完成了。畢業(yè)設(shè)計(jì)不僅是對(duì)前面所學(xué)知識(shí)的一種檢驗(yàn)，而且也是對(duì)自己能力的一種提高。自己要學(xué)習(xí)的東西還太多，以前老是覺得自己什么東西都會(huì)，什么東西都懂，有點(diǎn)眼高手低。在這次畢業(yè)設(shè)計(jì)中也使我們的同學(xué)關(guān)系更進(jìn)一步了，同學(xué)之間互相幫助，有什么不懂的大家在一起商量，聽聽不同的看法對(duì)我們更好的理解知識(shí)，所以在這里非常感謝幫助我的同學(xué)。最后終于做完了有種如釋重負(fù)的感覺。在此要感謝我的指導(dǎo)老師對(duì)我悉心的指導(dǎo)，感謝老師給我的幫助。在整個(gè)設(shè)計(jì)中我懂得了許多東西，也培養(yǎng)了我獨(dú)立工作的能力，樹立了對(duì)自己工作能力的信心，相信會(huì)對(duì)今后的學(xué)習(xí)工作生活有非常重要的影響。雖然這個(gè)設(shè)計(jì)做的也不太好，但是在設(shè)計(jì)過程中所學(xué)到的東西是這次畢業(yè)設(shè)計(jì)的最大收獲和財(cái)富，使我終身受益。致謝本次設(shè)計(jì)是在XX老師的精心指導(dǎo)下完成的，X老師學(xué)識(shí)淵博，做事認(rèn)真細(xì)心，在整個(gè)過程之中積極督促我們完成自己的畢業(yè)設(shè)計(jì)。對(duì)于我們?cè)谠O(shè)計(jì)中出現(xiàn)的問題趙老師都及時(shí)的指出，并且給予耐心的指導(dǎo)。在此對(duì)于趙老師的教導(dǎo)表示衷心的感謝！ 還要感謝每天都跟我一起在圖書館進(jìn)行畢業(yè)設(shè)計(jì)的同學(xué)們，我們一起研究，相互幫助，相互學(xué)習(xí)，遇到問題大家一起解決。同時(shí)也要感謝我的大學(xué)是它給我提供了這么好的學(xué)習(xí)環(huán)境，以及大學(xué)里面給以我諄諄教導(dǎo)的老師們，是他們無私將知識(shí)傳授給我。本文引用了數(shù)位學(xué)者的研究文獻(xiàn)，如果沒有各位學(xué)者的研究成果的幫助和啟發(fā)，我將很難完成本篇論文的寫作。由于我的學(xué)術(shù)水平有限，所寫論文難免有不足之處，懇請(qǐng)各位老師批評(píng)和指正。[3][5][7]（第一版）.t consider that it39。 , s Iamp。 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 selfanalysis. It also introduces software flow and use for problem judgement and sets a model on network reconstruction and puter flow.Thirdly, electricity system state is estimated to be one of the key techniques in DA realization. The dissertation remends 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 it’s validity by example and made to be good practical effect.Fifthly, concerning the lack of concordant wave on preve nting concordant wave and nonpower pensation and noncontinuity on pensation, 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 nonpower need of electric network tre nds and decreasing line loss bined 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 petitio n in shortterm trade under the way of grouped price and quantity harmony, but also puts forward bination 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 petitive price with improvement on petitive percentage and cut down the unfair ine 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, overvoltage 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 parison. It can help the network run in safety and limit the earth electric arc by using autotracking pensate 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 parison with technological and economy, the conclusion is drawn that the improved arc suppressing coil grounding mode