本文關鍵詞： 飛輪儲能系統(tǒng) 支承結構 數(shù)學模型 控制策略 試驗平臺　出處：《江蘇大學》2017年碩士論文　論文類型：學位論文

【摘要】：飛輪儲能技術是將風能、太陽能等可再生能量轉成飛輪的動能并加以存儲的技術,具有儲能密度高、充電時間短、使用周期長、無污染等優(yōu)點,在新能源汽車、微網(wǎng)和UPS供電系統(tǒng)等領域都有廣泛應用。飛輪的高速旋轉帶來的摩擦損耗是限制飛輪儲能技術發(fā)展因素之一,磁軸承能夠實現(xiàn)定轉子之間無摩擦,且轉速高、控制方便,可以提高飛輪系統(tǒng)的儲能效率和使用壽命。本文提出采用無軸承電機與三自由度磁軸承集成的新型結構作為飛輪儲能系統(tǒng)的支承結構方案,大大優(yōu)化的軸向空間,系統(tǒng)結構簡單。本文主要圍繞飛輪儲能系統(tǒng)中磁軸承支承系統(tǒng)的結構方案、數(shù)學模型、控制策略及實驗設計展開了一系列研究,主要研究內(nèi)容如下:首先,詳細介紹飛輪儲能系統(tǒng)的研究背景,分析飛輪儲能系統(tǒng)的關鍵技術及應用前景,全面論述近幾年磁軸承支承裝置及其控制策略的國內(nèi)外研究現(xiàn)狀,明確本課題的研究目的和意義其次,介紹并分析飛輪儲能系統(tǒng)的硬件結構和運行原理,列舉幾種常用飛輪儲能系統(tǒng)支承結構,對其優(yōu)缺點進行對比分析,研究各類磁軸承使用及內(nèi)外轉子結構之間的差異性,確定本文磁軸承支承飛輪儲能系統(tǒng)采用外轉子結構,并采用三自由度的磁軸承支承,軸向空間的利用率較高,結構較為緊湊,成本相對較低。對三自由度磁軸承的磁路及結構及其工作原理進行分析。再次,對三自由度磁軸承的磁路用等效磁路法進行推導,得徑向-軸向的懸浮力數(shù)學模型。并對磁軸承參數(shù)進行設計包含磁極面積及控制線圈安匝數(shù)設計、永磁材料參數(shù)設計等,給出了設計的流程框圖。三自由度磁軸承具有非線性特性,本文提出并設計模糊滑模變結構控制策略,對滑模變結構及模糊滑模變結構算法進行設計,再利用MATLAB軟件對三自由度磁軸承的起浮和受干擾下進行仿真研究,并與采用傳統(tǒng)的滑模變結構控制策略實驗結果作詳細的對比分析。最后,構建了三自由度磁軸承數(shù)字試驗平臺,介紹了試驗平臺的軟件系統(tǒng)、硬件組成及詳細的實驗調(diào)試方案,為今后各項參數(shù)調(diào)試奠定基礎;完成對三自由度的磁軸承的起浮和受擾動下的試驗,并對試驗結果作詳細分析。
[Abstract]:Flywheel energy storage technology is a technology that converts renewable energy such as wind energy and solar energy into kinetic energy of flywheel and stores it. It has the advantages of high energy storage density, short charging time, long service life, no pollution and so on. The friction loss caused by the high speed rotation of the flywheel is one of the factors limiting the development of the flywheel energy storage technology. The magnetic bearing can realize no friction between the stator and rotor, and the speed is high, the control is convenient, and the friction loss caused by the high-speed rotation of the flywheel is one of the factors limiting the development of the flywheel energy storage technology. The energy storage efficiency and service life of flywheel system can be improved. In this paper, a new type of structure integrated with bearingless motor and three-degree-of-freedom magnetic bearing is proposed as the supporting structure of flywheel energy storage system, which greatly optimizes the axial space. The structure of the system is simple. This paper mainly focuses on the structure scheme, mathematical model, control strategy and experimental design of the magnetic bearing support system in the flywheel energy storage system. The main research contents are as follows: first, The research background of flywheel energy storage system is introduced in detail, the key technology and application prospect of flywheel energy storage system are analyzed, and the research status of magnetic bearing supporting device and its control strategy at home and abroad in recent years is comprehensively discussed. The purpose and significance of this research are clarified. Secondly, the hardware structure and operation principle of flywheel energy storage system are introduced and analyzed, several kinds of common supporting structures of flywheel energy storage system are listed, and their advantages and disadvantages are compared and analyzed. This paper studies the difference between the use of various magnetic bearings and the structure of inner and outer rotors, and determines that the energy storage system of the flywheel supported by magnetic bearings adopts the outer rotor structure, and the magnetic bearings with three degrees of freedom are used to support the axial space with a high utilization ratio. The magnetic circuit, structure and working principle of the three-DOF magnetic bearing are analyzed. Thirdly, the equivalent magnetic circuit method is used to deduce the magnetic circuit of the three-degree-of-freedom magnetic bearing. The mathematical model of radial and axial suspension force is obtained. The design of magnetic bearing parameters includes the design of magnetic pole area and the number of ampere turns of control coil, the design of permanent magnetic material parameters, etc. The flow chart of the design is given. The three-degree-of-freedom magnetic bearing has nonlinear characteristics. In this paper, the fuzzy sliding mode variable structure control strategy is proposed and designed, and the sliding mode variable structure and fuzzy sliding mode variable structure algorithm are designed. Then, the MATLAB software is used to simulate the floatation and disturbance of three-degree-of-freedom magnetic bearings, and the results are compared with the experimental results of the traditional sliding mode variable structure control strategy. The digital test platform of three degrees of freedom magnetic bearing is constructed, and the software system, hardware composition and detailed experimental debugging scheme of the test platform are introduced, which will lay a foundation for the debugging of the parameters in the future. The floating and perturbed tests of the magnetic bearings with three degrees of freedom are completed, and the test results are analyzed in detail.
【學位授予單位】：江蘇大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TH133.7;TK02

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1 張維煜;朱q，

本文編號：1505141