【文章內(nèi)容簡(jiǎn)介】 諧振接地方式的運(yùn)行特性進(jìn)行了研究和介紹。從限制故障接地電弧的危害出發(fā)，重點(diǎn)論述如何利用電流諧振原理，有效熄滅故障接地電弧等。接著，本文結(jié)合國(guó)內(nèi)外科技的發(fā)展和創(chuàng)新成果，對(duì)諧振接地優(yōu)化方式中的微機(jī)接地保護(hù)性和自動(dòng)跟蹤補(bǔ)償裝置進(jìn)行全面的分析與論述，說(shuō)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(yùn)行特性，既解決了小電流接地系統(tǒng)接地保護(hù)的選擇 性，又實(shí)現(xiàn)了自動(dòng)調(diào)諧，使此種接地方式成為配電網(wǎng)比較理想的中性點(diǎn)接地方式。本文同時(shí)還對(duì)諧振接地方式實(shí)施技術(shù)進(jìn)行了研究，包括消弧線(xiàn)圈的參數(shù)選擇、安裝、調(diào)整、運(yùn)行與維護(hù)等內(nèi)容。 最后，本文總結(jié)了本課題研究的內(nèi)容。諧振接地籍助微機(jī)技術(shù)的支持，近些年來(lái)國(guó)內(nèi)外均在進(jìn)行優(yōu)化，優(yōu)化諧振接地技術(shù)是提高供電可靠性、保護(hù)人身安全、設(shè)備安全和電磁環(huán)境等的一項(xiàng)合理的重要技術(shù)手段，而諧振接地實(shí)施技術(shù)更充分發(fā)揮諧振接地方式的功能，使諧振接地方式具有更好的技術(shù)經(jīng)濟(jì)指標(biāo)。隨著電網(wǎng)的不斷發(fā)展和豐富的實(shí)踐結(jié)果表明，以諧振接地方式為代表的小電流接 地方式優(yōu)于其他接地方式，這是配電網(wǎng)的中性點(diǎn)接地方式發(fā)展的總趨勢(shì)，在今后的配電網(wǎng)接地方式中應(yīng)推廣應(yīng)用。 本論文提出的思路、方案和結(jié)論不僅對(duì)于 lOkV配電網(wǎng)中性點(diǎn)接地方式選擇研究、實(shí)際工程應(yīng)用具有實(shí)際的參考作用，對(duì)于其他電壓等級(jí)中性點(diǎn)接地方式選擇同樣具有借鑒的作用。 電力系統(tǒng)的基本功能是向用戶(hù)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(duì)于所有用戶(hù)都期望以最低的價(jià)格買(mǎi)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(hù)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(méi)有價(jià)值了。通過(guò)計(jì)算電網(wǎng)的投資和用戶(hù)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)。論文針對(duì)配電網(wǎng)各種接線(xiàn)模式的特點(diǎn)，就各種接線(xiàn)模式的經(jīng)濟(jì)性和可靠性進(jìn)行了分析。 論文首先介紹 lOkV配電網(wǎng)各種典型的接線(xiàn)模式和國(guó)外幾個(gè)國(guó)家的典型接線(xiàn)模式，然后確定配電網(wǎng)接線(xiàn)模式分析的思路，明確進(jìn)行分析的必要性和重要性。再提出最優(yōu)分段數(shù)計(jì)算的必要性，闡述最優(yōu)分段數(shù)對(duì)經(jīng)濟(jì)性和可靠性的影響，然后建立最優(yōu)分段數(shù)計(jì)算模 型，并簡(jiǎn)單介紹各種接線(xiàn)模式的供電方案。而后對(duì)配電網(wǎng)各種接線(xiàn)模式的可靠性和經(jīng)濟(jì)性進(jìn)行了計(jì)算和分析，通過(guò)計(jì)算并描繪的各種圖表。并對(duì)最優(yōu)分段數(shù)作了分析和討論。文章最后對(duì)各種接線(xiàn)模式的經(jīng)濟(jì)性和可靠性進(jìn)行總結(jié)，分析了各種接線(xiàn)模式各自的優(yōu)點(diǎn)和缺點(diǎn)，其適用情況。并結(jié)合實(shí)際情況針對(duì) lOkV 配電網(wǎng)的規(guī)劃和建設(shè)提出有益的建議。為 lOkV 配電網(wǎng)的規(guī)劃設(shè)計(jì)及為建成網(wǎng)架堅(jiān)實(shí)、布局合理、管理科學(xué)、能夠安全、優(yōu)質(zhì)、高效運(yùn)行的配電網(wǎng)提供理論的依據(jù)和有益的指引。 Power Supply and Distribution System The 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 bination 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 work. 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 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。 , s Iamp。 and e Iamp。 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 sc