發(fā)布時(shí)間：2018-02-09 06:32

  本文關(guān)鍵詞： 電力網(wǎng)絡(luò) 復(fù)雜網(wǎng)絡(luò) 連鎖故障 魯棒性 非單調(diào)增加 光伏電站并網(wǎng)　出處：《華北電力大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著發(fā)電廠、輸變電站和輸電線路不斷擴(kuò)建,以及光伏發(fā)電等新能源發(fā)電并網(wǎng)運(yùn)行,電力系統(tǒng)的復(fù)雜度越來(lái)越高,少數(shù)元件或局部故障引發(fā)的連鎖故障的危害也日益嚴(yán)重。因此,研究電力系統(tǒng)連鎖故障機(jī)理、光伏并網(wǎng)對(duì)電力系統(tǒng)的影響以及連鎖故障防御措施等關(guān)鍵性問(wèn)題,極為必要。復(fù)雜網(wǎng)絡(luò)理論是研究復(fù)雜電力系統(tǒng)連鎖故障的有效方法之一,大量的基于復(fù)雜網(wǎng)絡(luò)理論的連鎖故障研究表明,網(wǎng)絡(luò)對(duì)連鎖故障的魯棒性隨容量單調(diào)增加(即：容量增加有利于網(wǎng)絡(luò)安全)；然而本文分析結(jié)果顯示復(fù)雜電力網(wǎng)絡(luò)的魯棒性可能隨容量非單調(diào)增加(即：容量增加并非總有利于網(wǎng)絡(luò)安全)。本文詳細(xì)分析了復(fù)雜電力網(wǎng)絡(luò)魯棒性隨容量非單調(diào)變化的本質(zhì),并根據(jù)所得結(jié)論的啟發(fā),提出了行之有效的連鎖故障防御策略,最后對(duì)復(fù)雜電力網(wǎng)絡(luò)對(duì)光伏并網(wǎng)的魯棒性以及光伏并網(wǎng)點(diǎn)的選取進(jìn)行了初步探索和研究。所得結(jié)論可以為光伏并網(wǎng)電力系統(tǒng)的規(guī)劃和設(shè)計(jì)提供一定的參考和依據(jù)。本文的具體內(nèi)容如下： 1)依托度、聚類系數(shù)、電氣距離和電氣介數(shù)等統(tǒng)計(jì)特性指標(biāo),分析了5個(gè)IEEE系統(tǒng)的均勻性和小世界特性,發(fā)現(xiàn)IEEE-145的均勻性相對(duì)其他網(wǎng)絡(luò)較差,網(wǎng)絡(luò)IEEE-57、IEEE-118和IEEE-145擁有小世界特性。 2)建立復(fù)雜電力網(wǎng)絡(luò)連鎖故障模型來(lái)分析網(wǎng)絡(luò)對(duì)單一元件故障的魯棒性,發(fā)現(xiàn)復(fù)雜電力網(wǎng)絡(luò)的魯棒性可能隨容量非單調(diào)增加這一異常現(xiàn)象；將連鎖故障分為若干階段,通過(guò)分析每一階段過(guò)負(fù)荷節(jié)點(diǎn)比例、過(guò)負(fù)荷節(jié)點(diǎn)的度和電氣介數(shù)以及剩余負(fù)荷,發(fā)現(xiàn)增加的容量在連鎖故障初期保護(hù)了部分節(jié)點(diǎn),然而此后各階段網(wǎng)絡(luò)中的負(fù)荷量可能比容量增加前的多,導(dǎo)致更多的節(jié)點(diǎn)因不能承受增加的負(fù)荷而退出運(yùn)行,甚至可能包括一些度或電氣介數(shù)較大的關(guān)鍵節(jié)點(diǎn),致使連鎖故障規(guī)模擴(kuò)大,網(wǎng)絡(luò)的魯棒性出現(xiàn)異�，F(xiàn)象。這也說(shuō)明在連鎖故障初期移除少量的節(jié)點(diǎn)或邊可以防控連鎖故障。 3)提出基于電氣介數(shù)的主動(dòng)移除策略(Intentional Removals,IR)、主動(dòng)孤島和移除策略(Intentional Islanding and Removals,ⅡR)來(lái)防控復(fù)雜電力網(wǎng)絡(luò)連鎖故障,以網(wǎng)絡(luò)IEEE-39和IEEE-118為例對(duì)比分析了這兩個(gè)防御策略和主動(dòng)孤島策略(Intentional Islanding,Ⅱ)的功效,分析結(jié)果顯示三個(gè)策略可以在故障初期有效地降低網(wǎng)絡(luò)負(fù)荷水平,從而抑制連鎖故障大規(guī)模傳播,提高網(wǎng)絡(luò)魯棒性,其中ⅡR最優(yōu),Ⅱ次之。 4)建立光伏并網(wǎng)復(fù)雜電力網(wǎng)絡(luò)模型來(lái)分析網(wǎng)絡(luò)對(duì)光伏并網(wǎng)的魯棒性,分析結(jié)果表明,如果網(wǎng)絡(luò)容量較小,光伏電站并網(wǎng)運(yùn)行有可能誘發(fā)連鎖故障,網(wǎng)絡(luò)對(duì)光伏并網(wǎng)的魯棒性與網(wǎng)絡(luò)的容量、光伏電站的出力和并網(wǎng)點(diǎn)等有關(guān)。進(jìn)一步分析了光伏并網(wǎng)復(fù)雜電力網(wǎng)絡(luò)維持正常運(yùn)行所需的最小容量與并網(wǎng)點(diǎn)的特性之間的相關(guān)性,發(fā)現(xiàn)并網(wǎng)點(diǎn)電氣介數(shù)越大,最小容量越小；電氣介數(shù)相近時(shí),并網(wǎng)點(diǎn)為傳輸節(jié)點(diǎn)時(shí),最小容量相對(duì)較大。復(fù)雜電力網(wǎng)絡(luò)的容量越小,所需的建設(shè)費(fèi)用越低,因此,實(shí)際選擇光伏電站并網(wǎng)點(diǎn)時(shí),應(yīng)該優(yōu)先選擇電氣介數(shù)較大的節(jié)點(diǎn),并從中優(yōu)先選擇發(fā)電節(jié)點(diǎn)或配電節(jié)點(diǎn)。
[Abstract]:With the expansion of power plants , power transmission stations and transmission lines , and the operation of new energy power generation networks , such as photovoltaic power generation , the complexity of power systems is becoming more and more serious . Therefore , it is necessary to study the linkage failure mechanism of power systems , the effects of photovoltaic grid - grid on power system and linkage failure defense measures . The complex network theory is one of the effective methods for studying the linkage failure of complex power systems . This paper analyzes the nature of the non - monotonic change of the robustness of the complex power network , and puts forward the effective linkage fault defense strategy based on the result of the obtained conclusion . Finally , the robustness of the complex power network to the PV grid and the selection of the photovoltaic grid point are studied . The conclusion can provide some reference and basis for the planning and design of the photovoltaic grid - grid power system . The concrete contents of this paper are as follows : 1 ) The uniformity and small - world characteristics of five IEEE systems are analyzed based on the statistical characteristic indexes such as degree , clustering coefficient , electric distance and electric permittivity , and it is found that IEEE - 145 has less uniformity than other networks , and IEEE - 57 , IEEE - 118 , and IEEE - 145 have small world characteristics . 2 ) establishing a complex power network chain fault model to analyze the robustness of a network to a single element fault , finding that the robustness of the complex power network can increase the abnormal phenomenon with a non - monotonic capacity ; 3 ) An active removal strategy ( IR ) , active islanding ( IR ) , active islanding and Remover ( 鈪 ) are proposed to control chain faults of complex power networks . The results show that the three strategies can effectively reduce the network load level in the early stages of the fault , so as to suppress the large scale propagation of chain faults and improve the robustness of the network . 4 ) establishing a photovoltaic grid - connected complex power network model to analyze the robustness of the network to the photovoltaic grid - connected network ;

【學(xué)位授予單位】：華北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM711

【參考文獻(xiàn)】

相關(guān)期刊論文 前8條

1 曹一家;王光增;包哲靜;郭創(chuàng)新;;一種復(fù)雜電力網(wǎng)絡(luò)的時(shí)空演化模型[J];電力自動(dòng)化設(shè)備;2009年01期

2 孫可,韓禎祥,曹一家;復(fù)雜電網(wǎng)連鎖故障模型評(píng)述[J];電網(wǎng)技術(shù);2005年13期

3 葛睿;董昱;呂躍春;;歐洲“11.4”大停電事故分析及對(duì)我國(guó)電網(wǎng)運(yùn)行工作的啟示[J];電網(wǎng)技術(shù);2007年03期

4 舒征宇;鄧長(zhǎng)虹;黃文濤;翁毅選;;小世界電力網(wǎng)絡(luò)故障傳播過(guò)程與抑制策略[J];電網(wǎng)技術(shù);2013年03期

5 ;A novel evolving model for power grids[J];Science China(Technological Sciences);2010年10期

6 程臨燕;張保會(huì);李光輝;王進(jìn);郝治國(guó);薄志謙;;采用有向電氣介數(shù)的脆弱線路選取[J];西安交通大學(xué)學(xué)報(bào);2011年06期

7 徐林;王秀麗;王錫凡;;基于電氣介數(shù)的電網(wǎng)連鎖故障傳播機(jī)制與積極防御[J];中國(guó)電機(jī)工程學(xué)報(bào);2010年13期

8 胡柯;胡濤;唐翌;;Model for cascading failures with adaptive defense in complex networks[J];Chinese Physics B;2010年08期

相關(guān)博士學(xué)位論文 前1條

1 孫可;復(fù)雜網(wǎng)絡(luò)理論在電力網(wǎng)中的若干應(yīng)用研究[D];浙江大學(xué);2008年

，

本文編號(hào)：1497305