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

【摘要】：隨著雙饋異步風(fēng)電機(jī)組(DFIG)的大規(guī)模應(yīng)用,針對(duì)DFIG的控制研究也成為風(fēng)力發(fā)電的研究熱點(diǎn)。在電網(wǎng)發(fā)生故障導(dǎo)致風(fēng)電機(jī)組脫網(wǎng)時(shí),傳統(tǒng)的風(fēng)機(jī)控制需要并網(wǎng)啟動(dòng),這進(jìn)一步加重了電網(wǎng)運(yùn)行的負(fù)擔(dān)。隨著電力電子技術(shù)的發(fā)展,可以由風(fēng)電場實(shí)現(xiàn)自啟動(dòng)并為重要負(fù)荷供電,進(jìn)一步實(shí)現(xiàn)并網(wǎng)發(fā)電,增強(qiáng)電網(wǎng)運(yùn)行的健壯性。因此,有必要開展在脫網(wǎng)條件下風(fēng)電場的自啟動(dòng)與運(yùn)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(dòng)模型以及其電壓、頻率的響應(yīng)特性。通過詳細(xì)研究DFIG的運(yùn)行原理與結(jié)構(gòu),選取并推導(dǎo)了適合其自啟動(dòng)研究所需要的動(dòng)態(tài)模型。同時(shí)詳細(xì)研究了 DFIG的電壓以及頻率響應(yīng)特性,研究表明DFIG可以參與到風(fēng)電場自啟動(dòng)的電壓、頻率控制過程中。(2)提出了基于儲(chǔ)能系統(tǒng)的DFIG自啟動(dòng)控制方法。以脫網(wǎng)運(yùn)行下的DFIG動(dòng)態(tài)模型為研究對(duì)象,進(jìn)一步設(shè)計(jì)了采用反饋線性控制算法的風(fēng)電機(jī)組自啟動(dòng)控制模型。提出了一種DFIG自啟動(dòng)控制方法,其將自啟動(dòng)控制過程分為:自激啟動(dòng)、電壓調(diào)節(jié)、頻率調(diào)整三個(gè)階段,各階段對(duì)變流器采用不同的控制模型和開關(guān)規(guī)則,并通過時(shí)域仿真驗(yàn)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(fēng)電場啟動(dòng)與運(yùn)行控制方法。詳細(xì)研究了STATCOM/BESS的數(shù)學(xué)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(dòng)能力的DFIG風(fēng)電機(jī)群與常規(guī)DFIG風(fēng)電機(jī)群的面向接入點(diǎn)控制方法。該方法主要針對(duì)DFIG風(fēng)電場運(yùn)行的不同工況,一共分為自啟動(dòng)控制、電能質(zhì)量控制與協(xié)調(diào)啟動(dòng)控制三個(gè)階段。通過時(shí)域仿真驗(yàn)證了該方法可以實(shí)現(xiàn)整個(gè)風(fēng)電場的穩(wěn)定啟動(dòng)與運(yùn)行控制。(4)提出了基于模糊自適應(yīng)算法的風(fēng)電場啟動(dòng)與運(yùn)行控制方法。考慮到在風(fēng)電場的整體運(yùn)行控制中,不同階段對(duì)于有功和無功設(shè)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(diǎn)控制的基礎(chǔ)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(yīng)控制算法為基礎(chǔ),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(diǎn)控制方法相比較,通過時(shí)域仿真驗(yàn)證了模糊自適應(yīng)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(xué)位授予單位】：東南大學(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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