【正文】
ts the system configuration, the main station scheme, the feeder scheme, the optimized munication 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 singlephase and works out equation and several parameter s Uamp。論文針對配電網(wǎng)各種接線模式的特點,就各種接線模式的經(jīng)濟性和可靠性進行了分析。 本論文提出的思路、方案和結(jié)論不僅對于 lOkV配電網(wǎng)中性點接地方式選擇研究、實際工程應(yīng)用具有實際的參考作用,對于其他電壓等級中性點接地方式選擇同樣具有借鑒的作用。全面介紹國內(nèi)外幾種常用的中性點接地方式的運行特性,通過技術(shù)經(jīng)濟比較對不同的 接地方式進行綜合評價,再結(jié)合不同的接地方式的發(fā)展前景得出結(jié)論,優(yōu)化了的諧振接地方式表現(xiàn)出很大的發(fā)展?jié)摿?。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、對周邊的干擾等因素,都會影響中性點接地方式的選擇 。 本文是關(guān)于 110kV變電所一次部分的設(shè)計 。 第 6 周 —— 第 8 周( 2020 年 3 月 26 日 2020 年 4 月 15 日): 完成變電站設(shè)計相關(guān)的負(fù)荷分析與計算,電氣主接線設(shè)計。表明電力調(diào)度業(yè)務(wù)的實時性、準(zhǔn)確性和安全性是首要問題,是數(shù)據(jù)網(wǎng)絡(luò)設(shè)計的出發(fā)點。 文獻 [2]在節(jié)能發(fā)電調(diào)度對發(fā)電企業(yè)的影響及對策研究中,從各個發(fā)電機組突出節(jié)能發(fā)電調(diào)度的重要性和影響性。 4. 終端變電站 在輸電線路的終端,接近負(fù)荷點,高壓側(cè)電壓多為 110kv,經(jīng)降壓后直接向用戶供電的變電站。選擇變電站高低壓電氣設(shè)備,為變電站平面及剖面圖提供依據(jù)。 建國以來, 我國電力行業(yè)還在飛速的發(fā)展中,變電站,開閉所等基礎(chǔ)公共設(shè)施越來越完備,許多地區(qū)已經(jīng)實現(xiàn)了電能 傳輸、電壓等級轉(zhuǎn)化自動化等方面,電力系統(tǒng)實現(xiàn)調(diào)度自動化。 (3000 字以上 ) 一、設(shè)計(論文)背景、意義和現(xiàn)狀分析: 畢業(yè)論文是我們大學(xué)學(xué)習(xí)的最后一次綜合性訓(xùn)練。 變電站是電力系統(tǒng)的一個重要組成部分,由電器設(shè)備及配電網(wǎng)絡(luò)按一定的接線方式所構(gòu)成,他從電力系統(tǒng)取得電能,通過其變換、分配、輸 送與保護等功能,然后將電能安全、可靠、經(jīng)濟的輸送到每一個用電設(shè)備的轉(zhuǎn)設(shè)場所。變電所作為電力系統(tǒng)中一個關(guān)鍵的環(huán)節(jié)也同樣在新技術(shù)領(lǐng)域得到了充分的發(fā) 展。 從我國目前用電情況 看, 新建變電所應(yīng)充分體現(xiàn)出安全性、可靠性、經(jīng)濟性和先進性 。 文獻 [4]使電力企業(yè)獲得更高的效率和更大的經(jīng)濟 效益,這將是調(diào)度自動系統(tǒng)的發(fā)展方向。分析表明了公平度指標(biāo)能夠較好地響應(yīng)電量計劃完成率的分散程度 , 能夠表達調(diào)度機構(gòu)電量調(diào)度的公平程度。 第 14 周( 2020 年 5 月 21 日 2020 年 5 月 25 日) 撰寫論文,論文答辯。而待建變電所主變的選擇及其型式選擇是本次的設(shè)計的重點! 根據(jù)當(dāng)前我國變電站技術(shù)的發(fā)展現(xiàn)狀及技術(shù)發(fā)展趨向,按照現(xiàn)代電力系統(tǒng)設(shè)計要求,一次設(shè)備選擇增強自動化程度,減少設(shè)備運行維護工作量,突出無油化,免維護型設(shè)備,選用了目前較為先進的設(shè)備。因此,在綜合考慮供電可靠性、安全因素、過電壓因素、繼電保護的選擇、投資費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)接地方式的一個重要課題。接著,本文結(jié)合國內(nèi)外科技的發(fā)展和創(chuàng)新成果,對諧振接地優(yōu)化方式中的微機接地保護性和自動跟蹤補償裝置進行全面的分析與論述,說明諧振接地優(yōu)化方式在供電可靠性、人身安全、設(shè)備安全和通信干擾等方面,具有較好的運行特性,既解決了小電流接地系統(tǒng)接地保護的選擇性,又 實現(xiàn)了自動調(diào)諧,使此種接地方式成為配電網(wǎng)比較理想的中性點接地方式。對于所有用戶都期望以最低的價格買到具有高度可靠性的電能。而后對配電網(wǎng)各種接線模式的可靠性和經(jīng)濟性進行了計算和分析,通過計算并描繪的各種圖表。 table on problem . It brings out optimized isolation and resume plan, realizes auto isolation and work 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 work 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 work(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 work 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 bin