發(fā)布時(shí)間：2018-11-02 16:29

【摘要】：隨著新能源發(fā)電技術(shù)的逐漸發(fā)展成熟,風(fēng)力發(fā)電系統(tǒng)在現(xiàn)代電力系統(tǒng)中占據(jù)了相當(dāng)?shù)谋壤�。然�?風(fēng)能屬于典型的間歇性能源,風(fēng)的產(chǎn)生存在一定的隨機(jī)性。所以,風(fēng)力發(fā)電系統(tǒng)的可控性一般弱于傳統(tǒng)的發(fā)電系統(tǒng),這就嚴(yán)重影響了電力系統(tǒng)的安全運(yùn)行。風(fēng)力發(fā)電系統(tǒng)的大規(guī)模應(yīng)用面臨著嚴(yán)峻考驗(yàn)。儲(chǔ)能技術(shù)的發(fā)展為解決風(fēng)機(jī)的這些問題提供了可能性。在風(fēng)力發(fā)電系統(tǒng)中增加儲(chǔ)能設(shè)備,可以根據(jù)現(xiàn)實(shí)情況的需要,控制儲(chǔ)能系統(tǒng)與風(fēng)機(jī)進(jìn)行有效的能量交換,這將有助于風(fēng)電系統(tǒng)的可控性和安全性。在電力系統(tǒng)中添加儲(chǔ)能設(shè)備,也是未來智能電網(wǎng)建設(shè)的一項(xiàng)基本要求。飛輪儲(chǔ)能技術(shù)憑借其諸多優(yōu)勢,在增強(qiáng)風(fēng)電場發(fā)電系統(tǒng)運(yùn)行可靠性和效率方面可以發(fā)揮至關(guān)重要的作用。本文提出了一種應(yīng)用于永磁直驅(qū)式同步風(fēng)力發(fā)電機(jī)的風(fēng)場級飛輪儲(chǔ)能系統(tǒng)的協(xié)調(diào)控制策略。首先,對于飛輪儲(chǔ)能單元的控制,本文設(shè)計(jì)了相應(yīng)的充放電控制策略,并在轉(zhuǎn)速-電流雙閉環(huán)控制的基礎(chǔ)上,提出了一種改進(jìn)的神經(jīng)元自適應(yīng)PID控制器,將其用于控制飛輪電機(jī)的運(yùn)行,進(jìn)而實(shí)現(xiàn)飛輪儲(chǔ)能單元的充放電。然后根據(jù)經(jīng)典的李亞普諾夫穩(wěn)定性理論,提出了對該算法的穩(wěn)定性的證明方法,并通過數(shù)字仿真驗(yàn)證了算法的有效性和可行性。其次,與一般的飛輪儲(chǔ)能研究不同,在本文的研究中,除了為風(fēng)電場中的每臺(tái)風(fēng)機(jī)配備一臺(tái)飛輪儲(chǔ)能單元之外,還設(shè)計(jì)了一個(gè)飛輪儲(chǔ)能矩陣系統(tǒng)(flywheel energy storage matrix system,FESMS),并聯(lián)在風(fēng)電場的并網(wǎng)出口端。對于飛輪儲(chǔ)能矩陣,本文提出了它的電網(wǎng)拓?fù)浣Y(jié)構(gòu)設(shè)計(jì)方案,并按照主從控制的模式,設(shè)計(jì)了儲(chǔ)能矩陣與風(fēng)電場之間的充放電控制策略和安全控制策略。在飛輪儲(chǔ)能系統(tǒng)的配合下,風(fēng)速波動(dòng)較大的時(shí)段,風(fēng)電場依然可以向電網(wǎng)輸送相對平緩的有功功率。最后,通過分析永磁直驅(qū)式風(fēng)電系統(tǒng)遭遇低電壓故障時(shí)面臨的問題,設(shè)計(jì)了電網(wǎng)故障狀態(tài)飛輪儲(chǔ)能系統(tǒng)的充放電策略,在不影響風(fēng)能利用效率、避免能量浪費(fèi)的基礎(chǔ)上,提高了永磁直驅(qū)式風(fēng)機(jī)的低電壓穿越能力。本文的研究成果為飛輪儲(chǔ)能技術(shù)的發(fā)展提供了參考,為風(fēng)電場與飛輪儲(chǔ)能系統(tǒng)的應(yīng)用指出了方向和思路。
[Abstract]:With the development of new energy generation technology, wind power system occupies a considerable proportion in modern power system. However, wind energy is a typical intermittent energy, and wind generation has a certain randomness. Therefore, the controllability of wind power generation system is generally weaker than that of traditional generation system, which seriously affects the safe operation of power system. The large-scale application of wind power system is facing a severe test. The development of energy storage technology provides the possibility to solve these problems of fan. Adding energy storage equipment to wind power generation system can control the energy exchange between energy storage system and fan according to the actual situation, which will be helpful to the controllability and safety of wind power system. Adding energy storage equipment to power system is also a basic requirement of smart grid construction in the future. Flywheel energy storage technology, with its many advantages, can play an important role in enhancing the reliability and efficiency of wind power generation system. This paper presents a coordinated control strategy for wind field flywheel energy storage system applied to permanent magnet direct-drive synchronous wind turbine. Firstly, for the control of flywheel energy storage unit, the corresponding charge and discharge control strategy is designed, and an improved neuron adaptive PID controller is proposed on the basis of rotational speed and current double closed loop control. It is used to control the operation of flywheel motor and realize charging and discharging of flywheel energy storage unit. Then, according to the classical Lyapunov stability theory, a method to prove the stability of the algorithm is proposed, and the validity and feasibility of the algorithm are verified by digital simulation. Secondly, different from the general research of flywheel energy storage, in this paper, in addition to one flywheel energy storage unit for each typhoon in a wind farm, a flywheel energy storage matrix system (flywheel energy storage matrix system,FESMS) is also designed. Parallel in the wind farm grid outlet. For the flywheel energy storage matrix, the design scheme of its topology structure is presented, and the charging and discharging control strategy and the safety control strategy between the energy storage matrix and the wind farm are designed according to the master-slave control mode. With the cooperation of flywheel energy storage system, when wind speed fluctuates greatly, wind farm can still transmit relatively gentle active power to power grid. Finally, the charging and discharging strategy of flywheel energy storage system in fault state of power grid is designed by analyzing the problems faced by permanent magnet direct drive wind power system when it encounters low voltage fault, on the basis of not affecting the efficiency of wind energy utilization and avoiding energy waste. The low voltage traversing ability of permanent magnet direct drive fan is improved. The research results in this paper provide a reference for the development of flywheel energy storage technology, and point out the direction and train of thought for the application of wind farm and flywheel energy storage system.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM614

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本文編號：2306338