【摘要】：目前,隨著我國(guó)的風(fēng)電裝機(jī)容量和并網(wǎng)容量不斷增長(zhǎng)以及單機(jī)容量的增大,相應(yīng)地對(duì)于風(fēng)力發(fā)電機(jī)組運(yùn)行效率和故障穿越能力也有了更高的要求。實(shí)際運(yùn)行中的風(fēng)電系統(tǒng)價(jià)格昂貴、結(jié)構(gòu)復(fù)雜,直接選取其為研究對(duì)象,既不方便也不經(jīng)濟(jì),為了保證風(fēng)力發(fā)電系統(tǒng)安全穩(wěn)定運(yùn)行,需要選用合理有效的仿真方法對(duì)其控制技術(shù)進(jìn)行研究,而數(shù)字物理混合仿真技術(shù)結(jié)合了數(shù)字仿真與物理模擬的優(yōu)點(diǎn),可以節(jié)約開(kāi)發(fā)時(shí)間和硬件成本,是研究風(fēng)力發(fā)電系統(tǒng)特性及運(yùn)行控制的一種有效手段。本文介紹了風(fēng)力發(fā)電技術(shù)的研究現(xiàn)狀和雙饋風(fēng)力發(fā)電系統(tǒng)的運(yùn)行原理及組成,綜述了風(fēng)力發(fā)電控制系統(tǒng)仿真的研究,對(duì)雙饋風(fēng)力發(fā)電機(jī)的幾種主要控制方式進(jìn)行了比較分析。建立了雙饋風(fēng)力發(fā)電系統(tǒng)的數(shù)學(xué)模型,詳細(xì)研究了背靠背雙PWM變流器及其控制系統(tǒng),推導(dǎo)空載并網(wǎng)控制策略及最大功率追蹤控制策略,基于定子電壓定向?qū)崿F(xiàn)定子有功及無(wú)功功率的解耦控制,分析比較常用的低電壓穿越技術(shù),重點(diǎn)闡述了 Crowbar保護(hù)電路控制的原理。對(duì)數(shù)字物理混合仿真的相關(guān)理論進(jìn)行了深入研究,介紹了混合仿真的基本原理和主要接口類型,基于RTDS和實(shí)際的控制器開(kāi)發(fā)了 1套數(shù)字物理混合仿真系統(tǒng),分別設(shè)計(jì)了混合仿真系統(tǒng)的數(shù)字側(cè)系統(tǒng)和物理側(cè)系統(tǒng),兩者之間通過(guò)RTDS配備的GTIO板卡傳輸數(shù)據(jù)。在數(shù)字側(cè)設(shè)計(jì)了雙饋風(fēng)電系統(tǒng)主回路和變流器控制程序以及Crowbar保護(hù)電路,物理側(cè)系統(tǒng)包含有實(shí)現(xiàn)硬件在環(huán)的控制器實(shí)物和相關(guān)接口電路及控制程序。利用研制的數(shù)字物理混合仿真系統(tǒng),開(kāi)展了雙饋風(fēng)力發(fā)電系統(tǒng)空載并網(wǎng)、最大功率追蹤、低電壓穿越的混合仿真實(shí)驗(yàn),對(duì)實(shí)驗(yàn)結(jié)果進(jìn)行了分析,總結(jié)了不同風(fēng)速下并網(wǎng)對(duì)風(fēng)力發(fā)電系統(tǒng)的影響,驗(yàn)證了本文所研究雙饋風(fēng)力發(fā)電系統(tǒng)控制策略的有效性。
[Abstract]:At present, with the continuous growth of wind power installed capacity, grid-connected capacity and the increase of single machine capacity, there are higher requirements for the operational efficiency and fault traversing capacity of wind turbines. The wind power system in operation is expensive in price and complex in structure. It is neither convenient nor economical to select the wind power system directly as the research object. In order to ensure the safe and stable operation of the wind power system, It is necessary to select reasonable and effective simulation methods to study its control technology, and the digital physical hybrid simulation technology combines the advantages of digital simulation and physical simulation, which can save development time and hardware cost. It is an effective means to study the characteristics and operation control of wind power system. This paper introduces the research status of wind power generation technology and the operation principle and composition of doubly-fed wind power generation system, summarizes the research of wind power control system simulation, and makes a comparative analysis of several main control modes of doubly-fed wind power generator. The mathematical model of doubly-fed wind power generation system is established. The back-to-back dual PWM converter and its control system are studied in detail. The no-load grid-connected control strategy and maximum power tracking control strategy are derived. The decoupling control of active and reactive power of stator is realized based on stator voltage orientation. The common low voltage traversing technology is analyzed and the principle of Crowbar protection circuit control is expounded. The related theories of digital physical hybrid simulation are deeply studied. The basic principle and main interface types of hybrid simulation are introduced. A set of digital physical hybrid simulation system is developed based on RTDS and actual controller. The digital side system and the physical side system of the hybrid simulation system are designed, and the data are transmitted by the GTIO card equipped with RTDS. The main circuit and converter control program and Crowbar protection circuit of doubly-fed wind power system are designed on the digital side. The physical side system includes the controller physical and related interface circuit and control program which realize the hardware in loop. Using the digital physical hybrid simulation system developed, the hybrid simulation experiments of double-fed wind power generation system with no-load grid-connected, maximum power tracking and low-voltage traversing are carried out. The experimental results are analyzed. The effect of grid-connected wind power system under different wind speeds on wind power system is summarized, and the effectiveness of the control strategy of double-fed wind power generation system studied in this paper is verified.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM614

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本文編號(hào)：2261377