本文關(guān)鍵詞： 雙饋異步風機 自啟動 反饋線性控制 電能質(zhì)量控制 STATCOM/BESS 模糊自適應控制　出處：《東南大學》2017年碩士論文　論文類型：學位論文

【摘要】：隨著雙饋異步風電機組(DFIG)的大規(guī)模應用,針對DFIG的控制研究也成為風力發(fā)電的研究熱點。在電網(wǎng)發(fā)生故障導致風電機組脫網(wǎng)時,傳統(tǒng)的風機控制需要并網(wǎng)啟動,這進一步加重了電網(wǎng)運行的負擔。隨著電力電子技術(shù)的發(fā)展,可以由風電場實現(xiàn)自啟動并為重要負荷供電,進一步實現(xiàn)并網(wǎng)發(fā)電,增強電網(wǎng)運行的健壯性。因此,有必要開展在脫網(wǎng)條件下風電場的自啟動與運行控制方法的研究。本文主要研究工作如下:(1)研究了 DFIG的自啟動模型以及其電壓、頻率的響應特性。通過詳細研究DFIG的運行原理與結(jié)構(gòu),選取并推導了適合其自啟動研究所需要的動態(tài)模型。同時詳細研究了 DFIG的電壓以及頻率響應特性,研究表明DFIG可以參與到風電場自啟動的電壓、頻率控制過程中。(2)提出了基于儲能系統(tǒng)的DFIG自啟動控制方法。以脫網(wǎng)運行下的DFIG動態(tài)模型為研究對象,進一步設計了采用反饋線性控制算法的風電機組自啟動控制模型。提出了一種DFIG自啟動控制方法,其將自啟動控制過程分為:自激啟動、電壓調(diào)節(jié)、頻率調(diào)整三個階段,各階段對變流器采用不同的控制模型和開關(guān)規(guī)則,并通過時域仿真驗證了控制方法的有效性和穩(wěn)定性。(3)提出了基于STATCOM/BESS的風電場啟動與運行控制方法。詳細研究了STATCOM/BESS的數(shù)學模型,并給出了功率解耦控制方法;提出了在STATCOM/BESS的支撐下具備自啟動能力的DFIG風電機群與常規(guī)DFIG風電機群的面向接入點控制方法。該方法主要針對DFIG風電場運行的不同工況,一共分為自啟動控制、電能質(zhì)量控制與協(xié)調(diào)啟動控制三個階段。通過時域仿真驗證了該方法可以實現(xiàn)整個風電場的穩(wěn)定啟動與運行控制。(4)提出了基于模糊自適應算法的風電場啟動與運行控制方法。考慮到在風電場的整體運行控制中,不同階段對于有功和無功設備的需求不同,控制器單一的整定參數(shù)無法滿足總體最優(yōu)的需求,因此在面向接入點控制的基礎上提出了 STATCOM/BESS與DFIG的協(xié)調(diào)控制方法。該協(xié)調(diào)控制方法以模糊自適應控制算法為基礎,通過檢測系統(tǒng)中電壓與頻率的偏差量,不斷優(yōu)化整定STATCOM/BESS與DFIG的頻率、電壓控制器的整定值。與面向接入點控制方法相比較,通過時域仿真驗證了模糊自適應協(xié)調(diào)控制方法的優(yōu)越性和穩(wěn)定性。
[Abstract]:With the large-scale application of doubly-fed asynchronous wind turbine (DFG), the research on DFIG control has become the research hotspot of wind power generation. Traditional fan control needs to be connected to the grid, which further increases the burden of power grid operation. With the development of power electronics technology, wind farms can start themselves and supply power to important loads. Further realize grid-connected power generation, enhance the robustness of the grid operation. It is necessary to study the self-start and operation control method of wind farm under off-grid condition. The main research work in this paper is as follows: 1) the self-start model and its voltage of DFIG are studied. The principle and structure of DFIG are studied in detail. Select and deduce the dynamic model which is suitable for the self-start research. At the same time, the voltage and frequency response characteristics of DFIG are studied in detail. The research shows that DFIG can participate in the self-start voltage of wind farm. In the process of frequency control, a method of DFIG self-start control based on energy storage system is proposed. The dynamic model of DFIG under de-netting operation is taken as the research object. Furthermore, the self-start control model of wind turbine with feedback linear control algorithm is designed, and a DFIG self-start control method is proposed, which divides the self-start control process into self-excited startup and voltage regulation. Different control models and switching rules are used in each phase of frequency adjustment. The effectiveness and stability of the control method are verified by time-domain simulation. The method of wind farm start-up and operation control based on STATCOM/BESS is proposed, and the mathematical model of STATCOM/BESS is studied in detail. The power decoupling control method is also presented. This paper presents an access point oriented control method for DFIG wind power cluster and conventional DFIG wind turbine cluster supported by STATCOM/BESS. The method is mainly aimed at DFIG wind. Different operating conditions of electric field. It is divided into self-start control. Power quality control and coordinated startup control are three stages. The simulation in time domain proves that this method can realize the stable start-up and operation control of the whole wind farm. A method of wind farm start-up and operation control based on fuzzy adaptive algorithm is proposed, which is considered in the overall operation control of wind farm. At different stages, the demand for active and reactive power equipment is different, and the single tuning parameter of controller can not meet the overall optimal demand. Therefore, a coordinated control method for STATCOM/BESS and DFIG is proposed based on the fuzzy adaptive control algorithm. By detecting the deviation between voltage and frequency, the frequency of STATCOM/BESS and DFIG and the tuning value of voltage controller are optimized and compared with access point oriented control method. The superiority and stability of fuzzy adaptive coordinated control are verified by time domain simulation.
【學位授予單位】：東南大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TM614

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