本文關(guān)鍵詞：含大規(guī)模風電場的電網(wǎng)的無功補償控制策略研究　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： 雙饋風電機組 無功補償 靜止無功補償器 靜止同步補償器 聯(lián)合無功補償策略

【摘要】：在大型恒頻風力發(fā)電系統(tǒng)中，雙饋感應發(fā)電機組占了很大比重。它可以實現(xiàn)對風能的最大捕獲，，具有靈活的無功調(diào)節(jié)能力。但當電網(wǎng)受到較大擾動時，這種能力接近飽和，雙饋風電機組抵御電壓跌落的能力減弱，需要采取一定的措施保證風電場的連續(xù)穩(wěn)定運行。本文針對雙饋風電機組的無功補償問題進行了一系列分析研究，通過對目前幾種無功補償裝置的分析比較提出了一種聯(lián)合無功補償策略，以保持系統(tǒng)電壓穩(wěn)定，滿足風電場的并網(wǎng)要求。 本文首先介紹了雙饋風電機組的工作原理與數(shù)學模型，以某個實際風電場為例，應用MATLAB軟件對雙饋風電機組的穩(wěn)態(tài)與暫態(tài)特性進行了仿真分析。 其次，本文研究了SVC與STATCOM的數(shù)學模型與運行特性,并對這兩種無功補償裝置分別提出了相應的控制策略。結(jié)合某一實際電網(wǎng)，仿真分析了將SVC與STATCOM這兩種無功補償裝置分別應用到該地區(qū)風電場中的電壓特性。結(jié)果表明，SVC與STATCOM均能幫助風電場在電網(wǎng)故障后快速重建電壓，且相比之下STATCOM能更好地提高系統(tǒng)電壓穩(wěn)定性，補償效果優(yōu)于SVC。 最后，本文提出了并聯(lián)電容器+STATCOM聯(lián)合無功補償策略。選用某地區(qū)的兩個實際雙饋風電場為例，在并聯(lián)電容器與STATCOM不同容量的配合下，仿真分析了電網(wǎng)發(fā)生三相短路故障與電網(wǎng)發(fā)生單相接地短路故障的風電場輸出特性。結(jié)果表明該聯(lián)合無功補償策略能夠有效地提高風電場出口電壓以及風電場并網(wǎng)點電壓水平，為風電場無功補償裝置的選用提供了一種既有效又經(jīng)濟的補償策略。
[Abstract]:In large constant frequency wind power generation system, doubly-fed induction generator sets account for a large proportion. It can achieve the maximum capture of wind energy, and has flexible reactive power regulation ability. This capability is close to saturation and the ability of doubly-fed wind turbine to resist voltage drop is weakened. It is necessary to take certain measures to ensure the continuous and stable operation of wind farm. In this paper, a series of analysis and research on reactive power compensation of doubly-fed wind turbine are carried out. Based on the analysis and comparison of several kinds of reactive power compensation devices, a combined reactive power compensation strategy is proposed to keep the system voltage stable and meet the grid connection requirements of wind farms. This paper first introduces the working principle and mathematical model of doubly-fed wind turbine. Taking a practical wind farm as an example, the steady-state and transient characteristics of doubly-fed wind turbine are simulated and analyzed by using MATLAB software. Secondly, this paper studies the mathematical model and operation characteristics of SVC and STATCOM, and puts forward corresponding control strategies for the two kinds of reactive power compensation devices. The voltage characteristics of the two reactive power compensators, SVC and STATCOM, applied to the wind farm in this area are simulated and analyzed. The results show that the two kinds of reactive power compensation devices are applied to the wind farm in this area. Both SVC and STATCOM can help wind farm to reconstruct voltage quickly after power grid failure, and compared with STATCOM, it can improve system voltage stability better, and the compensation effect is better than that of SVC. Finally, this paper proposes a combined reactive power compensation strategy for shunt capacitor STATCOM. Two practical doubly-fed wind farms in a certain area are selected as examples. Under the cooperation of shunt capacitor and STATCOM of different capacity. Simulation results show that the combined reactive power compensation strategy can effectively increase the outlet voltage of wind farm and wind farm, and the output characteristics of wind farm with three-phase short-circuit fault and single-phase grounding short-circuit fault are analyzed. Dot voltage level. It provides an effective and economical compensation strategy for the selection of reactive power compensator in wind farm.
【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;TM714.3

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