本文選題：諧波潮流 + 諧波水平　； 參考：《天津大學(xué)》2014年碩士論文

【摘要】：諧波潮流計(jì)算是電力系統(tǒng)諧波分析的重要手段。通過計(jì)算可獲得系統(tǒng)的諧波分布情況,為電網(wǎng)的諧波治理提供依據(jù)。但目前用于諧波分析的諧波潮流算法多為確定性算法,無法對系統(tǒng)中的不確定因素進(jìn)行分析。配電網(wǎng)負(fù)荷種類繁多、變化頻繁,并且日益增多的分布式電源(DG)受天氣等因素的影響,出力具有更大的間歇性和隨機(jī)性,這直接導(dǎo)致了非線性負(fù)荷節(jié)點(diǎn)注入諧波電流具有不確定性,進(jìn)而導(dǎo)致配電網(wǎng)的諧波分布具有不確定性。本文建立了諧波源的恒流源復(fù)仿射模型,以區(qū)間代替點(diǎn)值表示諧波源的不確定信息。考慮到前推回代算法能高效計(jì)算輻射型配電網(wǎng)潮流,以及復(fù)仿射數(shù)學(xué)能克服區(qū)間數(shù)學(xué)固有的保守性,提出了配電網(wǎng)三相不確定諧波潮流的前推回代復(fù)仿射算法。采用典型配電系統(tǒng)算例對算法進(jìn)行了驗(yàn)證,將蒙特卡羅諧波潮流分析方法與所提算法的計(jì)算結(jié)果進(jìn)行了對比,從完備性、保守性、收斂性和計(jì)算速度四個(gè)方面對所提算法進(jìn)行了評估。提出了含DG配電網(wǎng)的諧波潮流算法。由于DG多通過并網(wǎng)逆變器接入配電網(wǎng),將與配電網(wǎng)產(chǎn)生相互作用,對電網(wǎng)諧波分布造成影響,故以并網(wǎng)逆變器的輸出阻抗模型對DG建模,并用于諧波潮流計(jì)算,可計(jì)及電網(wǎng)結(jié)構(gòu)、電網(wǎng)背景諧波、DG接入位置等多方面因素。針對典型配電系統(tǒng)算例分別計(jì)算了DG采用輸出阻抗模型和恒流源模型時(shí)的諧波潮流,對含DG配電網(wǎng)的諧波分布以及DG注入諧波電流進(jìn)行了計(jì)算分析,研究了DG接入位置、電網(wǎng)諧波水平等對DG注入諧波電流以及諧波分布的影響。針對DG出力的不確定性,建立了DG并網(wǎng)逆變器輸出阻抗復(fù)仿射模型,與諧波源恒流源的復(fù)仿射模型同時(shí)應(yīng)用于諧波潮流計(jì)算中,提出了含DG配電網(wǎng)的不確定諧波潮流的前推回代復(fù)仿射算法。通過典型配電系統(tǒng)算例將算法與蒙特卡羅諧波潮流分析方法的計(jì)算結(jié)果進(jìn)行對比,評估了含DG配電網(wǎng)的不確定諧波潮流算法的各項(xiàng)性能。
[Abstract]:Harmonic power flow calculation is an important means of harmonic analysis in power system. The harmonic distribution of the system can be obtained by calculation, which provides the basis for the harmonic treatment of the power network. However, most of the harmonic power flow algorithms used in harmonic analysis are deterministic algorithms, which can not be used to analyze the uncertain factors in the system. There are many kinds of load in distribution network, which change frequently, and more distributed power sources (DGs) are influenced by weather and other factors, so the output power has more intermittence and randomness. This directly leads to the uncertainty of the harmonic current injected by the nonlinear load node and the uncertainty of the harmonic distribution of the distribution network. In this paper, the complex affine model of constant current source of harmonic source is established, and the uncertain information of harmonic source is represented by interval instead of point value. Considering that the forward pushback algorithm can efficiently calculate the radiation distribution network power flow and the complex affine mathematics can overcome the inherent conservatism of interval mathematics, a forward push-back iterative reaffine algorithm for three-phase uncertain harmonic power flow in distribution network is proposed. A typical distribution system example is used to verify the algorithm. The Monte Carlo harmonic power flow analysis method is compared with the calculated results of the proposed algorithm, which is based on completeness and conservatism. The proposed algorithm is evaluated from four aspects: convergence and computational speed. A harmonic power flow algorithm with DG distribution network is proposed. Because DG is connected to distribution network through grid-connected inverter, it will interact with distribution network and affect the harmonic distribution of power network, so the output impedance model of grid-connected inverter is used to model DG, and it is used to calculate harmonic power flow. It can take into account the power network structure, power network background harmonics DG access location and other factors. The harmonic power flow of DG using output impedance model and constant current source model is calculated for typical distribution system examples. The harmonic distribution and DG injected harmonic current in DG distribution network are calculated and analyzed, and the DG access position is studied. The influence of harmonic level on DG injection harmonic current and harmonic distribution. Aiming at the uncertainty of DG output force, the output impedance complex affine model of DG grid-connected inverter is established, which is applied to harmonic power flow calculation at the same time as the complex affine model of harmonic source constant-current source. A forward push-back iterative affine algorithm for uncertain harmonic power flow with DG distribution network is proposed. By comparing the calculation results of the algorithm with the Monte Carlo harmonic power flow analysis method, the performance of the uncertain harmonic power flow algorithm with DG distribution network is evaluated by a typical distribution system example.
【學(xué)位授予單位】：天津大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM744

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 韓亮;王守相;;含光伏風(fēng)電的基于仿射算法的配電三相潮流計(jì)算[J];電網(wǎng)技術(shù);2013年12期

2 丁濤;柏瑞;郭慶來;孫宏斌;吳文傳;張伯明;;一種非迭代仿射算法的輸電網(wǎng)區(qū)間潮流計(jì)算方法[J];中國電機(jī)工程學(xué)報(bào);2013年19期

3 許德志;汪飛;毛華龍;阮毅;張巍;;多并網(wǎng)逆變器與電網(wǎng)的諧波交互建模與分析[J];中國電機(jī)工程學(xué)報(bào);2013年12期

4 尤毅;劉東;于文鵬;陳飛;潘飛;;主動(dòng)配電網(wǎng)技術(shù)及其進(jìn)展[J];電力系統(tǒng)自動(dòng)化;2012年18期

5 朱屹;楊世彥;孟凡剛;;直流側(cè)帶PWM整流器的12脈波整流系統(tǒng)及其負(fù)載適應(yīng)性[J];電工技術(shù)學(xué)報(bào);2012年08期

6 丁濤;崔翰韜;顧偉;萬秋蘭;;基于區(qū)間和仿射運(yùn)算的不確定潮流算法[J];電力系統(tǒng)自動(dòng)化;2012年13期

7 孫媛媛;王小宇;尹志明;;多諧波源系統(tǒng)的非迭代式諧波潮流分析[J];中國電機(jī)工程學(xué)報(bào);2012年07期

8 吳杰;顏秉超;梁婷婷;;含雙饋風(fēng)機(jī)的配電網(wǎng)模糊諧波潮流計(jì)算[J];電力自動(dòng)化設(shè)備;2011年12期

9 張春杰;賈清泉;;含雙饋異步電機(jī)的概率諧波潮流計(jì)算[J];電力電子技術(shù);2011年11期

10 丁世飛;齊丙娟;譚紅艷;;支持向量機(jī)理論與算法研究綜述[J];電子科技大學(xué)學(xué)報(bào);2011年01期

相關(guān)博士學(xué)位論文 前1條

1 孫媛媛;非線性電力電子裝置的諧波源模型及其在諧波分析中的應(yīng)用[D];山東大學(xué);2009年

相關(guān)碩士學(xué)位論文 前3條

1 周文珊;主動(dòng)配電網(wǎng)建模及諧波特性研究[D];北京交通大學(xué);2012年

2 文晶;電力系統(tǒng)諧波分析方法研究[D];天津大學(xué);2010年

3 王軍;帶分布式發(fā)電的配電網(wǎng)諧波研究[D];中國科學(xué)院研究生院（電工研究所）;2006年

，

本文編號(hào)：1976723