本文選題：配電網(wǎng) + 快速Ybus高斯法��； 參考：《華北電力大學(xué)(北京)》2017年碩士論文

【摘要】：目前配電網(wǎng)是電網(wǎng)的薄弱環(huán)節(jié),配電網(wǎng)線損嚴(yán)重就是其中一個重要問題,解決方法的關(guān)鍵一步是準(zhǔn)確計算理論線損。但是傳統(tǒng)的理論線損計算方法計算結(jié)果誤差大、精度低,不能準(zhǔn)確反映想實際線損情況。因此,高精度的理論線損計算方法逐漸受到了人們的重視,潮流法就是其中之一。課題以提高理論線損計算準(zhǔn)確度為目標(biāo),研究潮流法在理論線損計算中的應(yīng)用,設(shè)計并開發(fā)中低壓配電一體化理論線損計算軟件。理論研究方面,本文對快速Ybus高斯法和電流注入型牛頓法的單相潮流模型進(jìn)行研究,并利用平均功率的方法提出在理論線損計算中的應(yīng)用方案。然后本文將包括電力元件在內(nèi)的單相潮流模型擴(kuò)展到三相潮流模型,并在第二章的基礎(chǔ)上,提出三相潮流在理論線損計算中的應(yīng)用方案。其中,快速Ybus高斯法采用相分量以更好地應(yīng)對三相負(fù)荷不對稱問題,電流注入型牛頓法采用直角坐標(biāo)系進(jìn)行程序設(shè)計。兩種潮流算法的三相模型都詳細(xì)介紹了PV節(jié)點的處理方式,因為PV節(jié)點需要根據(jù)發(fā)電機(jī)內(nèi)部電壓電流關(guān)系增加約束方程,才能滿足潮流計算條件。實踐應(yīng)用方面,本文將所研究的潮流算法與數(shù)據(jù)庫接口技術(shù)、重載算法、稀疏技術(shù)相結(jié)合,設(shè)計并開發(fā)中低壓配電一體化理論線損計算軟件。軟件實現(xiàn)了對單相系統(tǒng)和三相系統(tǒng)的統(tǒng)一計算,可以準(zhǔn)確詳細(xì)地得到系統(tǒng)中每條線路的理論線損,很大程度地提高了理論線損計算的準(zhǔn)確性。最后本文使用IEEE單相和三相標(biāo)準(zhǔn)算例驗證了算法的正確性;使用33節(jié)點配電網(wǎng)系統(tǒng)驗證了三相負(fù)荷不對稱對理論線損的影響;使用實際算例驗證了軟件的實用性。結(jié)果表明軟件收斂穩(wěn)定、快速,可以應(yīng)對多種不同情況的系統(tǒng)。
[Abstract]:At present, distribution network is the weak link of power network, the serious line loss of distribution network is one of the important problems. The key step to solve the problem is to calculate the theoretical line loss accurately. However, the traditional theoretical line loss calculation method can not accurately reflect the actual line loss due to its large error and low accuracy. Therefore, high-precision theoretical line loss calculation methods have been paid more and more attention, among which power flow method is one of them. In order to improve the accuracy of theoretical line loss calculation, the application of power flow method in theoretical line loss calculation is studied, and the software of theoretical line loss calculation for medium-low voltage distribution integration is designed and developed. In theory, this paper studies the single-phase power flow model of the fast Ybus Gao Si method and the current injection Newton method, and puts forward the application scheme in the theoretical line loss calculation by using the average power method. Then the single-phase power flow model, including power components, is extended to the three-phase power flow model, and based on the second chapter, the application scheme of three-phase power flow in theoretical line loss calculation is proposed. Among them, the fast Ybus Gao Si method adopts phase component to deal with the problem of three-phase load asymmetry better, and the current injection Newton method adopts the right-angle coordinate system for programming. The three phase models of the two power flow algorithms both introduce the processing methods of PV nodes in detail because PV nodes need to increase the constraint equation according to the relationship between voltage and current in order to meet the power flow calculation conditions. In the aspect of practical application, this paper combines the power flow algorithm with database interface technology, heavy load algorithm and sparse technology to design and develop the software for line loss calculation of the theory of integration of middle and low voltage distribution. The software realizes the unified calculation of single-phase system and three-phase system, and the theoretical line loss of each line in the system can be obtained accurately and in detail, which greatly improves the accuracy of theoretical line loss calculation. Finally, the IEEE single-phase and three-phase standard examples are used to verify the correctness of the algorithm; the 33-bus distribution network system is used to verify the influence of three-phase load asymmetry on the theoretical line loss; the practical example is used to verify the practicability of the software. The results show that the software converges stably and quickly, and can deal with many different situations.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM744

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 劉健;段t燊，

本文編號：1788051