本文選題：功率平滑 + 飛輪儲能　； 參考：《沈陽工業(yè)大學(xué)》2017年碩士論文

【摘要】：風(fēng)力發(fā)電具有間歇性、隨機性和波動性,風(fēng)電的大規(guī)模并網(wǎng)會嚴重威脅到電網(wǎng)的調(diào)度及電網(wǎng)的穩(wěn)定性。為了提高風(fēng)電場輸出電能質(zhì)量、抑制功率波動,減緩電網(wǎng)對風(fēng)電的接納限制,可采用儲能裝置抑制風(fēng)電場輸出功率波動。充分利用飛輪儲能響應(yīng)速度快、轉(zhuǎn)換效率高、維護簡單、使用壽命長、對環(huán)境無污染等優(yōu)點。本文研究基于飛輪儲能裝置的風(fēng)電場輸出功率平滑控制策略,風(fēng)電場10kWh飛輪儲能裝置變流器的控制策略是研究的重點。主要工作如下:(1)研究飛輪儲能的技術(shù)特點、工作原理及其裝置結(jié)構(gòu);飛輪儲能裝置選用永磁同步電機作為飛輪電機,采用矢量控制技術(shù)作為飛輪電機的控制方法,構(gòu)建飛輪儲能裝置的數(shù)學(xué)模型。(2)針對飛輪儲能控制中外界擾動過大、電機內(nèi)部參數(shù)發(fā)生變化的問題,在飛輪儲能裝置電機側(cè)變流器控制系統(tǒng)中,設(shè)計了基于滑�？刂频娘w輪電機電流調(diào)節(jié)器,用以替代PID控制器�；Ｕ{(diào)節(jié)器以飛輪儲能裝置的參考功率和飛輪電機的實際轉(zhuǎn)速作為輸入、將積分項和時變項引入到常規(guī)滑模面、根據(jù)指數(shù)趨近律設(shè)計控制律,這些設(shè)計使該飛輪儲能裝置的控制系統(tǒng)具有更好地魯棒性、更佳的抗擾能力和動態(tài)響應(yīng)性能。(3)針對飛輪儲能存在的容量小、功率較低的主要缺點,在儲能系統(tǒng)中加入蓄電池裝置,用以配合飛輪儲能裝置進行儲能。提出了基于飛輪-蓄電池聯(lián)合儲能的風(fēng)電功率平滑控制策略。采用低通濾波的方法來確定飛輪儲能裝置和蓄電池的功率分配參考值,并設(shè)計模糊控制器對蓄電池和飛輪儲能裝置的參考功率進行實時修正,更加充分的發(fā)揮飛輪儲能響應(yīng)速度快和循環(huán)使用壽命長特點。在Matlab/Simulink的仿真環(huán)境下搭建模型,仿真結(jié)果表明:本文所設(shè)計的基于滑模控制的飛輪電機電流調(diào)節(jié)器,具有更佳的動態(tài)響應(yīng)能力和抗擾性,使飛輪電機的轉(zhuǎn)速波動減小,同時使風(fēng)電場功率平滑效果更好,證明了所設(shè)計方法的有效性。提出的基于飛輪-蓄電池聯(lián)合儲能的風(fēng)電功率平滑控制策略既能夠?qū)︻l率高、且幅值小的功率波動起到平抑作用,又能夠?qū)︻l率低、但幅值大的功率波動起到平抑作用,使風(fēng)電場輸出的功率平滑效果有了大幅提升,證明了本文所提出的控制策略的正確性。
[Abstract]:Wind power generation is intermittent, random and fluctuating. The large-scale grid connection of wind power will seriously threaten the dispatching and stability of power grid. In order to improve the output power quality of wind farm, restrain the fluctuation of power and slow down the acceptance of wind power in power grid, the energy storage device can be used to restrain the fluctuation of output power of wind farm. The advantages of flywheel energy storage, such as fast response speed, high conversion efficiency, simple maintenance, long service life and no pollution to the environment, are fully utilized. In this paper, the output power smoothing control strategy of wind farm based on flywheel energy storage device is studied. The control strategy of wind farm 10kWh flywheel energy storage device converter is the focus of the research. The main work is as follows: (1) the technical characteristics, working principle and device structure of flywheel energy storage are studied, the permanent magnet synchronous motor (PMSM) is selected as flywheel motor, and vector control technology is used as flywheel motor control method. The mathematical model of flywheel energy storage device is built. (2) aiming at the problem that the external disturbance in flywheel energy storage control is too large and the internal parameters of motor change, in the control system of motor side converter of flywheel energy storage device, A flywheel motor current regulator based on sliding mode control is designed to replace pid controller. The sliding mode regulator takes the reference power of the flywheel energy storage device and the actual speed of the flywheel motor as input. The integral term and the time-varying term are introduced into the conventional sliding mode surface, and the control law is designed according to the exponential approach law. These designs make the control system of the flywheel energy storage device have better robustness, better immunity against disturbance and dynamic response performance. (3) the main disadvantages of the flywheel energy storage are small capacity and low power. Accumulator is added to energy storage system for energy storage with flywheel energy storage device. A smooth control strategy of wind power based on flywheel-battery combined energy storage is proposed. The method of low-pass filter is used to determine the power distribution reference value of flywheel energy storage device and battery, and a fuzzy controller is designed to modify the reference power of storage battery and flywheel energy storage device in real time. More fully display the flywheel energy storage response speed and long cycle life. The simulation results of Matlab / Simulink show that the current regulator based on sliding mode control has better dynamic response ability and immunity, and reduces the speed fluctuation of flywheel motor. At the same time, the wind farm power smoothing effect is better, which proves the effectiveness of the design method. The proposed wind power smoothing control strategy based on flywheel battery combined storage energy can not only stabilize the power fluctuation with high frequency and small amplitude, but also stabilize the power fluctuation with low frequency but large amplitude. The power smoothing effect of wind farm output is greatly improved, which proves the correctness of the control strategy proposed in this paper.
【學(xué)位授予單位】：沈陽工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TM614;TM46

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