本文關(guān)鍵詞：風電場電壓實時控制策略研究　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： 雙饋風電場 電壓/無功協(xié)調(diào)控制 機組內(nèi)無功分配

【摘要】：風力發(fā)電作為一種快速發(fā)展的可再生能源方式，在全世界的能源格局所占份額持續(xù)上升，風力發(fā)電技術(shù)和風力發(fā)電市場得到了飛速發(fā)展，風能對于電力系統(tǒng)的影響也越來越大。因此，從事風電研究的科學工作者們以及決策者都需要全面了解風能對于整個電網(wǎng)的正反兩方面影響。雙饋感應(yīng)風力發(fā)電機作為市場上現(xiàn)有的主流風機，不僅在有功功率調(diào)整方面性能卓越，同時也有出色的電壓/無功調(diào)整能力。對于雙饋感應(yīng)風電場的電壓/無功調(diào)節(jié)是目前各國風電研究者們重點關(guān)注的問題。 本文作為北京華電天仁電力控制技術(shù)有限公司科研項目“儲能型風電場能量管理系統(tǒng)軟件開發(fā)’’的一部分，依據(jù)國家電網(wǎng)公司提出的《風電場接入電網(wǎng)技術(shù)規(guī)定》和《風電并網(wǎng)運行控制技術(shù)規(guī)定》中對于風電并網(wǎng)電壓/無功控制要求，以遼寧省錦州芳山風電場（全部為雙饋感應(yīng)式風力發(fā)電機）為主要研究對象，對雙饋風機群接入電網(wǎng)中對電網(wǎng)電壓的影響采取電壓/無功調(diào)控策略，為實現(xiàn)廠/站端對于風電的有效控制，提供參考。 主要研究內(nèi)容： （1）統(tǒng)計分析了現(xiàn)有風電場的電壓/無功控制現(xiàn)狀，其中包括：針對雙饋電機闡述了變速恒頻運行的基本原理、有載調(diào)壓變壓器電壓調(diào)整特性、靜止無功補償器（SVC）電壓/無功調(diào)整特性，研究了雙饋感應(yīng)式風電機組/場的無功功率容量，有功—無功特性。 （2）提出兩級電壓/無功協(xié)調(diào)控制策略，一級電壓控制通過對具有電壓/無功調(diào)整能力裝置進行優(yōu)化調(diào)整實現(xiàn)，二級控制利用斜率算法分配風電機群內(nèi)部無功出力實現(xiàn)。 （3）一級風電場電壓控制具體過程為利用優(yōu)化模型，分配被控DFIG機群、各種無功補償裝置的無功出力以及升壓變電站有載調(diào)壓變壓器的分接頭位置；二級風機群電壓控制通過離線計算不同位置風機無功輸出對并網(wǎng)點電壓影響程度，得出風電機群內(nèi)部無功分配斜率比例，實現(xiàn)控制目標。 （4）以錦州芳山風電場作為仿真研究模型，仿真驗證電壓控制前后在實際風速下風電并網(wǎng)點的電壓狀況以及風機群輸出無功功率。搭建simulink仿真模型，仿真獲得不同距離下風機群無功出力對于PCC點電壓影響程度，，獲得斜率參數(shù)。比較采用斜率分配與常規(guī)分配下的風機群無功出力對于電壓調(diào)整的程度。
[Abstract]:Wind power generation as a rapid development of renewable energy, the share of energy patterns in the world continues to rise, wind power technology and wind power market has been rapid development. Wind power has become more and more important to the power system. Scientists and decision makers engaged in wind power research need to have a comprehensive understanding of the positive and negative effects of wind power on the whole grid. Doubly-fed induction wind turbines are the existing mainstream fans in the market. Not only in the active power adjustment, but also in the voltage / reactive power adjustment ability. The voltage / reactive power regulation of the doubly-fed induction wind farm is the focus of attention of wind power researchers in the world. This paper is a part of Beijing Huadian Tianren Electric Power Control Technology Co., Ltd. "Energy management system software development of energy storage wind farm". According to the state grid company proposed "wind farm access grid technical regulations" and "wind power grid operation control regulations" for wind power grid voltage / reactive power control requirements. Taking Fangshan wind farm in Jinzhou Liaoning Province (all of which are doubly-fed induction wind generators) as the main research object, the voltage / reactive power regulation strategy is adopted for the influence of doubly-fed fan group on the grid voltage. It provides a reference for the effective control of wind power at the plant / station end. Main research contents: 1) the current situation of voltage / reactive power control in existing wind farms is statistically analyzed, including: the basic principle of variable speed constant frequency operation and voltage regulation characteristics of on-load voltage regulating transformers are expounded for doubly-fed power plants. The characteristics of voltage / reactive power adjustment of static Var compensator (SVC) are studied. The reactive power capacity, active power and reactive power characteristics of doubly-fed induction wind turbine / field are studied. A two-stage voltage / reactive power coordinated control strategy is proposed. The primary voltage control is realized by optimizing the device with the capacity of voltage / reactive power adjustment. The second stage control uses slope algorithm to distribute reactive power in wind turbine cluster. The specific process of voltage control in the first stage wind farm is to allocate the controlled DFIG cluster, reactive output force of various reactive power compensation devices and the tap position of the on-load voltage regulating transformer in the booster substation by using the optimized model. Voltage control of two-stage fan group calculates the influence of reactive power output of fan in different position on the voltage of parallel dot through off-line calculation. The slope ratio of reactive power distribution in wind turbine cluster is obtained and the control goal is achieved. Taking Jinzhou Fangshan wind farm as the simulation model. The simulation verifies the voltage condition of wind power network and the reactive power output of fan group under the actual wind speed before and after voltage control. The simulink simulation model is built. The influence of reactive power of fan group on the voltage of PCC point was obtained by simulation, and the slope parameters were obtained, and the degree of adjustment of reactive power to voltage of fan group under slope distribution and conventional distribution was compared.
【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】：TM614

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