本文關(guān)鍵詞： 廣義負(fù)荷模型 光伏電站 電力參數(shù)尋優(yōu) 電力系統(tǒng)仿真　出處：《沈陽(yáng)農(nóng)業(yè)大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：電力工業(yè)發(fā)展是保障國(guó)民經(jīng)濟(jì)穩(wěn)定運(yùn)行、居民生活水平提高的重要保障。為了應(yīng)對(duì)氣候變化和能源危機(jī),包含光伏發(fā)電在內(nèi)的可再生能源有效利用已經(jīng)成為國(guó)家戰(zhàn)略,光伏電站接入電網(wǎng)成為有效措施。作為可再生能源供電的典型代表,光伏發(fā)電呈現(xiàn)強(qiáng)勁的發(fā)展勢(shì)頭。如何有效利用光伏發(fā)電成為目前急需解決的問題。本研究針對(duì)遼寧西部地區(qū)地區(qū)66kV配電網(wǎng)在光伏電站接入時(shí)廣義負(fù)荷模型展開研究,目的是提出典型供電地區(qū)適用的廣義負(fù)荷模型,可為電力系統(tǒng)仿真軟件的開發(fā)和完善、定量分析光伏電站接入對(duì)電網(wǎng)的影響、提高光伏發(fā)電利用率提供參考。根據(jù)有效的廣義負(fù)荷模型,找出解決相應(yīng)問題的方法及策略,這樣可以提高電力系統(tǒng)自動(dòng)化程度、有效提升光伏電站和主電網(wǎng)互利共生關(guān)系、主動(dòng)有效地提升電力能源市場(chǎng)改革交易等各個(gè)方面具有重要的理論意義和實(shí)用價(jià)值。廣義負(fù)荷模型綜合考慮了 66kV配電網(wǎng)的常規(guī)電源、光伏電站、無功補(bǔ)償裝置等元件的動(dòng)態(tài)變化和有功、無功的相互影響特性。本研究是針對(duì)遼寧西部地區(qū)電網(wǎng)進(jìn)行負(fù)荷建模研究。除了經(jīng)典的靜態(tài)負(fù)荷模型和電動(dòng)機(jī)負(fù)荷模型以外,還著重研究光伏電站電源潮流電壓特性、動(dòng)態(tài)特性及其相互影響。由于線路電抗電阻參數(shù)的不同,系統(tǒng)潮流與電壓的關(guān)系也存在著差異。選擇典型66kV輸電線路系統(tǒng)展開研究,相對(duì)易于獲取實(shí)測(cè)數(shù)據(jù)。本研究圍繞電網(wǎng)負(fù)荷模型及其參數(shù)自動(dòng)辨識(shí)部分進(jìn)行研究和軟件開發(fā)。設(shè)計(jì)了含光伏電站的66kV配網(wǎng)廣義負(fù)荷模型及其電力參數(shù)尋優(yōu)的方法和具體實(shí)現(xiàn)過程。通過對(duì)66kV線路有功負(fù)荷數(shù)據(jù)方程的電力參數(shù)尋優(yōu),計(jì)算得到通用非線性線路功率與兩端電壓的關(guān)系模型的三個(gè)尋優(yōu)常數(shù)。為電網(wǎng)負(fù)荷模型及其參數(shù)自動(dòng)辨識(shí)提供解決思路,在電能發(fā)輸配用系統(tǒng)規(guī)劃和仿真分析中提供技術(shù)支持和相對(duì)完善的仿真平臺(tái)。
[Abstract]:The development of electric power industry is an important guarantee to ensure the stable operation of national economy and the improvement of living standard. In order to cope with climate change and energy crisis, the effective use of renewable energy, including photovoltaic power generation, has become a national strategy. As a typical representative of renewable energy supply, photovoltaic power station access to the grid becomes an effective measure. Photovoltaic power generation shows a strong development momentum. How to effectively utilize photovoltaic power generation has become an urgent problem. This study focuses on the generalized load model of 66 kV distribution network in western Liaoning province when the photovoltaic power station is connected. The purpose of this paper is to propose a generalized load model for typical power supply areas, which can be used for the development and improvement of power system simulation software and the quantitative analysis of the impact of PV power station access on the power network. According to the effective generalized load model, the methods and strategies to solve the corresponding problems can be found, which can improve the degree of power system automation and effectively enhance the symbiotic relationship between photovoltaic power station and main grid. It is of great theoretical significance and practical value to actively and effectively promote the reform and transaction of power energy market. The generalized load model takes into account the conventional power supply and photovoltaic power station in 66kV distribution network. The dynamic changes of components such as reactive power compensator and the interaction between active and reactive power are studied in this paper. This study is aimed at the research of load modeling in western Liaoning power network. In addition to the classical static load model and motor load model, the dynamic change of reactive power compensator and the interaction between reactive power and reactive power are studied in this paper. The characteristics of power flow voltage, dynamic characteristics and mutual influence of photovoltaic power supply are also studied. Because of the difference of reactance parameters, the relationship between power flow and voltage is also different. A typical 66 kV transmission line system is selected to study the relationship between power flow and voltage. It is relatively easy to obtain the measured data. This study focuses on the research and software development of load model and parameter automatic identification of power network. The generalized load model of 66kV distribution network with photovoltaic power station and its power parameter optimization method are designed. By optimizing the power parameters of the active load data equation of 66kV transmission line, Three optimization constants of the general nonlinear line power and voltage relationship model are obtained, which provide a solution to the load model and its parameter automatic identification. It provides technical support and relatively perfect simulation platform in the system planning and simulation analysis of power generation, transmission and distribution.
【學(xué)位授予單位】：沈陽(yáng)農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM615;TM743
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本文編號(hào)：1512746