【摘要】：近幾年來，我國大力發(fā)展智能電網(wǎng)，這對于優(yōu)化資源配置、提高供電可靠性、節(jié)能環(huán)保有著重要意義。配電網(wǎng)自動化是智能電網(wǎng)建設(shè)的關(guān)鍵環(huán)節(jié)，準(zhǔn)確、快速的潮流計算為配電網(wǎng)的分析提供依據(jù)，網(wǎng)絡(luò)重構(gòu)則可以實現(xiàn)配電網(wǎng)的經(jīng)濟(jì)優(yōu)化運行。本文圍繞配電網(wǎng)三相潮流計算、經(jīng)濟(jì)性重構(gòu)，以及分布式電源接入后的配電網(wǎng)潮流計算和網(wǎng)絡(luò)重構(gòu)等問題展開研究。 首先，針對配電網(wǎng)三相不對稱、網(wǎng)絡(luò)規(guī)模大等特點，研究了大規(guī)模配電網(wǎng)的三相潮流計算方法。建立了配電網(wǎng)饋線、變壓器和負(fù)荷的三相數(shù)學(xué)模型，討論了常用的配電網(wǎng)潮流計算算法；針對已有的各類潮流算法在計算大規(guī)模配電網(wǎng)潮流上的缺陷，將求解大規(guī)模稀疏線性方程組的共軛梯度平方(Conjugate GradientSquare，CGS)迭代法引入到潮流計算當(dāng)中，通過對線性方程組迭代方式的優(yōu)化，提出了一種結(jié)合Jacobi預(yù)處理的CGS三相潮流算法。4個不同規(guī)模IEEE算例的仿真結(jié)果證明，該算法具有較好的收斂性和優(yōu)良的求解速度，適合于計算大規(guī)模配電網(wǎng)潮流。 其次，將生物學(xué)上的人工培植雜交方法引入配電網(wǎng)重構(gòu)。詳細(xì)介紹了人工培植雜交方法的原理和配電網(wǎng)支路的分類方法，闡述了重構(gòu)過程中的染色體編碼方式和物種染色體初始化過程、物種變異過程和物種雜交過程，針對在變異和雜交過程中產(chǎn)生少量不可行解的問題提出了修復(fù)方法，并提出了基于人工培植雜交的配電網(wǎng)重構(gòu)算法，IEEE33節(jié)點和IEEE69節(jié)點仿真算例結(jié)果表明該重構(gòu)算法具有較好的魯棒性和快速的收斂性。 最后，研究含分布式電源的配電網(wǎng)潮流計算和網(wǎng)絡(luò)重構(gòu)方法。介紹了幾類分布式電源，討論了分布式電源在配電網(wǎng)潮流計算和配電網(wǎng)重構(gòu)中的節(jié)點類型轉(zhuǎn)換處理方式，給出了在處理含分布式電源的配電網(wǎng)潮流計算和重構(gòu)的流程，，進(jìn)行了潮流計算和網(wǎng)絡(luò)重構(gòu)算例的仿真和分析，驗證了所提算法在含分布式電源配電網(wǎng)中的適用性。
[Abstract]:In recent years, the development of smart grid in China is of great significance for optimizing the allocation of resources, improving the reliability of power supply, and saving energy and environmental protection. Distribution network automation is the key link of smart grid construction. Accurate and fast power flow calculation provides the basis for distribution network analysis and network reconfiguration can realize the economic optimization operation of distribution network. This paper focuses on three-phase power flow calculation of distribution network, economic reconfiguration, distribution network power flow calculation and network reconfiguration after distributed power supply access. Firstly, the calculation method of three-phase power flow in large-scale distribution network is studied according to the characteristics of three-phase asymmetry and large-scale distribution network. The three-phase mathematical models of feeder, transformer and load in distribution network are established, and the common calculation algorithms of power flow in distribution network are discussed. The conjugate gradient square (Conjugate GradientSquare,CGS) iterative method for solving large-scale sparse linear equations is introduced into the power flow calculation for large-scale power flow calculation, aiming at the shortcomings of the existing power flow algorithms in large-scale distribution network power flow calculation. By optimizing the iterative mode of linear equations, a three-phase power flow algorithm based on Jacobi pretreatment is proposed. The simulation results of four different scale IEEE examples show that the proposed algorithm has good convergence and excellent solution speed. It is suitable for calculating the power flow of large-scale distribution network. Secondly, the hybrid method of artificial cultivation in biology is introduced into distribution network reconfiguration. In this paper, the principle of artificial culture hybridization method and the classification method of distribution network branch are introduced in detail. The chromosome coding method, the initialization process of species chromosome, the process of species variation and the process of species hybridization in the process of reconstruction are described in detail. In order to solve the problem of producing a small number of infeasible solutions in the process of mutation and hybridization, a repair method is proposed, and an algorithm of distribution network reconfiguration based on artificial cultivation hybridization is proposed. The simulation results of IEEE33 node and IEEE69 node show that the reconstruction algorithm has good robustness and fast convergence. Finally, the power flow calculation and network reconfiguration of distribution network with distributed power supply are studied. This paper introduces several kinds of distributed power supply, discusses the node type conversion processing mode of distributed power supply in distribution network power flow calculation and distribution network reconfiguration, and gives the flow chart of power flow calculation and reconfiguration of distribution network with distributed power supply in the process of processing power flow calculation and reconfiguration of distribution network with distributed power supply. Simulation and analysis of power flow calculation and network reconfiguration examples are carried out to verify the applicability of the proposed algorithm in distribution networks with distributed power sources.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM744

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