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  本文關(guān)鍵詞：分散式風電接入配網(wǎng)無功優(yōu)化控制　出處：《華北電力大學》2014年碩士論文　論文類型：學位論文

  更多相關(guān)文章： 分散式風電 無功優(yōu)化策略 微分進化算法 內(nèi)點法

【摘要】：風力發(fā)電技術(shù)日益成熟,已成為我國電力工業(yè)的重要組成部分。國家出臺相關(guān)政策鼓勵分散式風電的發(fā)展。分散式風電是將風電機組以分散多點的方式接入低電壓配電系統(tǒng),風能的隨機性和間歇性將會引起電網(wǎng)潮流和系統(tǒng)電壓的頻繁變化,給電網(wǎng)運行帶來不利影響。制定分散式風電接入地區(qū)的無功優(yōu)化控制策略,將有助于解決這一問題。本文以分散式風電接入地區(qū)配網(wǎng)為研究對象,根據(jù)電網(wǎng)中不同無功補償設(shè)備的運行特點制定相關(guān)的控制策略,本文主要工作如下： (1)研究風電機組的有功無功出力特性,配電網(wǎng)中無功補償設(shè)備的運行特性。分析配電網(wǎng)中無功補償設(shè)備的配置原則,總結(jié)無功補償設(shè)備在配電網(wǎng)的安裝地點和容量的選擇以及無功功率控制策略。 (2)分散式風電并網(wǎng)會對配電網(wǎng)的運行造成一定的影響�？紤]風電出力的波動性和隨機性,研究風電機組類型不同,接入位置不同及所接電網(wǎng)負荷不同時配電網(wǎng)的運行狀況。并引入了電壓網(wǎng)損改善指標,使用改進牛頓拉夫遜法進行潮流計算,分析了分散式風電接入后對電網(wǎng)電壓網(wǎng)損的影響程度。通過對IEEE33節(jié)點系統(tǒng)的仿真,使用實測風電出力與負荷數(shù)據(jù),分析各種情況下風電接入對系統(tǒng)影響的變化規(guī)律,為分散式風電接入電網(wǎng)提供了有益的參考。 (3)考慮分散式風電接入電網(wǎng)的影響制定相關(guān)控制策略：日無功優(yōu)化控制和短時無功優(yōu)化控制�？紤]到投切電容器組投切次數(shù)限制,而且無功出力無法連續(xù)調(diào)節(jié)的特性,制訂日無功優(yōu)化策略,優(yōu)化的決策變量為電容器組的投切時間及容量,以一天24小時總有功網(wǎng)損為目標函數(shù)；根據(jù)SVC/SVG及風電機組的無功出力連續(xù)快速調(diào)節(jié)特性,制定短時無功優(yōu)化策略,優(yōu)化決策變量為SVC/SVG及風電組的無功出力,選用全網(wǎng)節(jié)點電壓偏移額定值最小為目標函數(shù)。使用實際電網(wǎng)模型進行仿真,驗證優(yōu)化策略的可行性。
[Abstract]:Wind power generation technology is becoming more and more mature. It has become an important part of China's power industry. The state has issued relevant policies to encourage the development of decentralized wind power. Decentralized wind power is to connect wind turbines to low-voltage distribution systems in a decentralized multi-point manner. The randomness and intermittency of wind energy will cause frequent changes in power flow and system voltage, which will adversely affect the operation of the power grid. The optimal reactive power control strategy for decentralized wind power access areas is formulated. This paper takes the decentralized wind power distribution network as the research object and formulates the relevant control strategy according to the operation characteristics of different reactive power compensation equipment in the power network. The main work of this paper is as follows: 1) the characteristics of active and reactive power output of wind turbines and the operation characteristics of reactive power compensation equipment in distribution network are studied, and the configuration principle of reactive power compensation equipment in distribution network is analyzed. The selection of installation location and capacity of reactive power compensation equipment in distribution network and reactive power control strategy are summarized. (2) decentralized wind power grid connection will have a certain impact on the operation of distribution network. Considering the fluctuation and randomness of wind power output, different types of wind turbine units are studied. The operation condition of distribution network with different access position and load is different, and the improved Newton-Raphson method is used to calculate the power flow by introducing the improvement index of voltage loss. The influence of distributed wind power on the network voltage loss is analyzed. Through the simulation of IEEE33 node system, the measured wind power output and load data are used. This paper analyzes the influence of wind power access on the system under various conditions and provides a useful reference for decentralized wind power access to the power network. (3) considering the influence of decentralized wind power access to the power network, the related control strategies are formulated: daily reactive power optimal control and short-time reactive power optimization control, taking into account the switching times of switching capacitor banks. Moreover, the reactive power can not be adjusted continuously. The optimal strategy of daily reactive power is formulated. The optimal decision variables are the switching time and capacity of the capacitor bank, and the total active power network loss 24 hours a day is taken as the objective function. According to the rapid and continuous regulation of reactive power of SVC/SVG and wind turbine, the short-time reactive power optimization strategy is formulated, and the optimal decision variable is the reactive power of SVC/SVG and wind power unit. The minimum voltage offset rating of the whole network node is chosen as the objective function, and the feasibility of the optimization strategy is verified by the simulation of the actual power network model.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM761.12

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