發(fā)布時(shí)間：2019-05-23 14:50

【摘要】：配電網(wǎng)線(xiàn)損是電力系統(tǒng)運(yùn)行經(jīng)濟(jì)性的一項(xiàng)重要指標(biāo)，它反映了一個(gè)電力網(wǎng)的規(guī)劃設(shè)計(jì)和運(yùn)營(yíng)管理水平由于配電網(wǎng)的負(fù)荷形狀系數(shù)難以準(zhǔn)確獲知，，因此通過(guò)典型日的理論線(xiàn)損計(jì)算結(jié)果無(wú)法直接用于下達(dá)考核指標(biāo)本文基于對(duì)平均電流法中形狀系數(shù)的定義及物理意義，對(duì)10千伏配電網(wǎng)變壓器和各分段線(xiàn)路的可變損耗進(jìn)行極限計(jì)算，然后計(jì)及企業(yè)專(zhuān)線(xiàn)供電量，最終獲得了10千伏配電網(wǎng)理論線(xiàn)損率的變化范圍 在計(jì)算公用配電變壓器極限可變損耗時(shí)，本文通過(guò)理論推導(dǎo)得出了變壓器極限月負(fù)荷曲線(xiàn)，其中損耗極大值月負(fù)荷曲線(xiàn)是變壓器在月供電量約束下負(fù)荷僅取月最大及最小負(fù)荷形成的矩形波樣式負(fù)荷曲線(xiàn)；損耗極小值月負(fù)荷曲線(xiàn)是變壓器的負(fù)荷以月平均負(fù)荷的水平線(xiàn)進(jìn)行擬合，其中月最大負(fù)荷及最小負(fù)荷以沖擊脈沖的形式出現(xiàn) 在計(jì)算饋線(xiàn)各分段線(xiàn)路上極限損耗時(shí)，本文按照月負(fù)荷曲線(xiàn)形狀系數(shù)取極限值的思想，根據(jù)饋線(xiàn)拓?fù)鋸暮笸耙来螌?duì)各分段線(xiàn)路上的極限負(fù)荷曲線(xiàn)疊加，最終通過(guò)平均電流法得到了各分段線(xiàn)路上的極限損耗另外，本文在考慮了饋線(xiàn)出口處月最大負(fù)荷約束條件下，提出一種實(shí)用的迭代方法求解線(xiàn)路上損耗的極大值該方法采用分時(shí)段擬合的方式得到了各時(shí)段饋線(xiàn)各變壓器極限負(fù)荷的最佳組合，該組合下饋線(xiàn)公共線(xiàn)路上的損耗功率取極大值進(jìn)而得到了計(jì)算月內(nèi)各變壓器月極限負(fù)荷曲線(xiàn)中最大及最小負(fù)荷的時(shí)間分布，然后從后往前推出各節(jié)點(diǎn)處的月極限負(fù)荷曲線(xiàn)，最終得到出口約束下各分段線(xiàn)路上月?lián)p耗的極大值 最后，本文以某區(qū)供電局10千伏配電網(wǎng)為例，對(duì)本文方法進(jìn)行算例分析，驗(yàn)證了本文關(guān)于10千伏配電網(wǎng)理論線(xiàn)損計(jì)算方法的有效性和可行性 源于配電網(wǎng)拓?fù)鋸?fù)雜，計(jì)量自動(dòng)化程度不高及數(shù)據(jù)海量等特點(diǎn)，供電企業(yè)在配電網(wǎng)線(xiàn)損管理中存在諸多問(wèn)題，由于本文是對(duì)10千伏配電網(wǎng)變壓器及分段線(xiàn)路逐個(gè)分析，因此可對(duì)線(xiàn)損異常的線(xiàn)路進(jìn)行重點(diǎn)核查，挖掘管理過(guò)程中的薄弱環(huán)節(jié)和技術(shù)損耗中的降損空間另外本文計(jì)算結(jié)果可以作為上級(jí)部門(mén)了解地區(qū)配電網(wǎng)現(xiàn)狀，下達(dá)考核指標(biāo)及評(píng)估企業(yè)配電網(wǎng)線(xiàn)損管理水平的重要依據(jù)，進(jìn)而迫使下級(jí)部門(mén)提高線(xiàn)損管理的質(zhì)量
[Abstract]:The line loss of distribution network is an important index of power system operation economy, which reflects the planning, design and operation management level of a power network, which is difficult to know accurately because of the load shape coefficient of distribution network. Therefore, the theoretical line loss calculation results of typical days can not be directly used to issue the assessment index. This paper is based on the definition and physical meaning of the shape coefficient in the average current method. The limit calculation of variable loss of transformer and segmented line in 10 kV distribution network is carried out, and then the power supply of enterprise special line is taken into account. Finally, the variation range of theoretical line loss rate of 10 kV distribution network is obtained when calculating the limit variable loss of public distribution transformer. In this paper, the limit monthly load curve of transformer is obtained by theoretical derivation. The monthly load curve of maximum loss is a rectangular wave load curve formed by the maximum and minimum load of transformer under the constraint of monthly power supply. The monthly load curve of the minimum loss value is that the load of the transformer is fitted by the horizontal line of the monthly average load, in which the monthly maximum load and the minimum load appear in the form of impact pulse when the limit loss on each segment of the feeder line is calculated. In this paper, according to the idea of taking the limit value of the shape coefficient of the monthly load curve, according to the feeder topology, the limit load curve on each segmented line is superimposed from back to front, and finally the limit loss on each segmented line is obtained by the average current method. In this paper, taking into account the monthly maximum load constraint at the outlet of the feeder, In this paper, a practical iterative method is proposed to solve the maximum loss on the line. The optimal combination of the ultimate load of each transformer in each period of feeder is obtained by means of period fitting. In this paper, the loss power on the common line of the combined feeder is maximized, and the time distribution of the maximum and minimum load in the monthly limit load curve of each transformer in the month is obtained, and then the monthly limit load curve at each node is derived from the back forward. Finally, the maximum loss of each segmented line under export constraint is obtained last month. Finally, taking the 10 kV distribution network of a district power supply bureau as an example, an example is given to analyze the method in this paper. It is verified that the effectiveness and feasibility of the theoretical line loss calculation method for 10 kV distribution network in this paper is due to the complexity of distribution network topology, the low degree of measurement automation and the massive data. There are many problems in the line loss management of distribution network in power supply enterprises. because this paper analyzes the transformer and segmented line of 10 kV distribution network one by one, it can carry on the key verification to the line with abnormal line loss. In addition, the calculation results of this paper can be used as an important basis for the superior department to understand the present situation of the regional distribution network, issue the assessment index and evaluate the management level of the distribution network line loss in the enterprise. In turn, the lower departments are forced to improve the quality of line loss management.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TM744

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 孫宏斌,張伯明,相年德;配電匹配潮流技術(shù)及其在配電狀態(tài)估計(jì)中的應(yīng)用[J];電力系統(tǒng)自動(dòng)化;1998年07期

2 丁心海,羅毅芳,劉巍,施流忠;改進(jìn)配電網(wǎng)線(xiàn)損計(jì)算方法的幾點(diǎn)建議[J];電力系統(tǒng)自動(dòng)化;2001年13期

3 溫建春;韓學(xué)山;張利;;一種配電網(wǎng)理論線(xiàn)損計(jì)算的改進(jìn)算法[J];電力系統(tǒng)及其自動(dòng)化學(xué)報(bào);2008年04期

4 李秀卿;趙麗娜;孟慶然;王興東;孫志政;;IGA優(yōu)化的神經(jīng)網(wǎng)絡(luò)計(jì)算配電網(wǎng)理論線(xiàn)損[J];電力系統(tǒng)及其自動(dòng)化學(xué)報(bào);2009年05期

5 徐茹枝;王宇飛;;粒子群優(yōu)化的支持向量回歸機(jī)計(jì)算配電網(wǎng)理論線(xiàn)損方法[J];電力自動(dòng)化設(shè)備;2012年05期

6 丁心海,羅毅芳,劉巍,施流忠;配電網(wǎng)線(xiàn)損理論計(jì)算的實(shí)用方法——改進(jìn)迭代法[J];電網(wǎng)技術(shù);2000年01期

7 陳得治,郭志忠;基于負(fù)荷獲取和匹配潮流方法的配電網(wǎng)理論線(xiàn)損計(jì)算[J];電網(wǎng)技術(shù);2005年01期

8 霍佳麗;王主丁;聶崇峽;;電能損耗近似計(jì)算常用方法的誤差分析[J];電網(wǎng)技術(shù);2009年18期

9 邱智民;;配電網(wǎng)線(xiàn)損理論計(jì)算與管理系統(tǒng)的開(kāi)發(fā)[J];大眾科技;2008年09期

10 張艷;許哲雄;羅成;;一種基于RBF神經(jīng)網(wǎng)絡(luò)線(xiàn)損計(jì)算方法研究[J];電氣開(kāi)關(guān);2012年04期

本文編號(hào)：2483991