本文選題：微電網(wǎng) + 電能質(zhì)量�。� 參考：《華南理工大學(xué)》2015年碩士論文

【摘要】：作為分布式可再生能源規(guī)�；�、高效利用的實(shí)現(xiàn)形式和智能電網(wǎng)建設(shè)的重要組成部分,微電網(wǎng)正日益成為研究關(guān)注的熱點(diǎn)。然而,微電網(wǎng)中分布式電源因其固有的隨機(jī)性、間歇性和不穩(wěn)定性,會對微電網(wǎng)電能質(zhì)量產(chǎn)生負(fù)面影響,特別是孤網(wǎng)運(yùn)行時影響尤為明顯。因此,如何有效地對微電網(wǎng)電能質(zhì)量進(jìn)行治理,成為提高微電網(wǎng)可靠、安全運(yùn)行性能以及推動微電網(wǎng)技術(shù)應(yīng)用發(fā)展的關(guān)鍵。利用儲能裝置提供快速功率緩沖,可以穩(wěn)定、平滑電網(wǎng)電壓和頻率波動,很好地解決由分布式電源及微電網(wǎng)自身運(yùn)行特點(diǎn)產(chǎn)生的電壓驟降、電壓跌落等電能質(zhì)量問題。本文以中科院重要方向性項(xiàng)目—東澳海島微網(wǎng)示范電站為依托,利用MATLAB/SIMULINK仿真軟件搭建了典型海島微網(wǎng)系統(tǒng)模型,研究分析了電池儲能系統(tǒng)對微網(wǎng)電能質(zhì)量的整治效果,并通過示范工程驗(yàn)證了研究結(jié)論的正確性。具體研究內(nèi)容如下:1、探討了分布式電源、蓄電池的建模及其控制策略。2、分析蓄電池儲能系統(tǒng)的接入以及控制方式。根據(jù)微網(wǎng)中分布式電源容量與發(fā)電特性、負(fù)荷要求,從功率需求的角度,提出了蓄電池容量的設(shè)計(jì)方法。為避免蓄電池過充電和過放電,提高電池的循環(huán)使用效率和壽命,提出了一種蓄電池剩余容量估算方法。針對不同的電池類型、不同的電池容量以及不同串并聯(lián)方式,對蓄電池儲能系統(tǒng)進(jìn)行建模仿真,對比分析了各種電池配置下的蓄電池儲能系統(tǒng)的功率交換能力。3、對不含儲能系統(tǒng)的海島微網(wǎng)系統(tǒng)進(jìn)行了仿真,研究在風(fēng)速和光照資源波動以及光伏系統(tǒng)啟停的工況下,對微網(wǎng)電能質(zhì)量的影響情況。根據(jù)風(fēng)光資源隨機(jī)變化、光伏系統(tǒng)啟停以及大功率感性負(fù)荷啟停三種工況進(jìn)行系統(tǒng)仿真,研究分析了蓄電池儲能系統(tǒng)對微電網(wǎng)電能質(zhì)量的影響及整治效果。研究結(jié)論表明,蓄電池儲能系統(tǒng)可對分布式電源引起的電壓與頻率波動、三相電壓不平衡、母線電壓總諧波畸變率等電能質(zhì)量問題,起到顯著的改善作用,并且對由大功率感性負(fù)荷啟停造成的電壓波動也有很好的治理作用。最后,通過東澳海島微網(wǎng)示范電站運(yùn)行測試數(shù)據(jù)分析,驗(yàn)證了本文的研究結(jié)論。
[Abstract]:As a large scale of distributed renewable energy and an important part of smart grid construction, microgrid is becoming a hot research topic. However, because of its inherent randomness, intermittency and instability, distributed generation in microgrid will have a negative impact on the power quality of microgrid, especially in the operation of isolated grid. Therefore, how to effectively control the power quality of microgrid becomes the key to improve the reliability, safe operation performance and promote the development of microgrid technology. Using the energy storage device to provide fast power buffering can stabilize and smooth the voltage and frequency fluctuation of the power network and solve the power quality problems such as voltage drop and voltage drop caused by the characteristics of distributed power generation and microgrid itself. In this paper, based on the important directional project of the Chinese Academy of Sciences-Dongao Island Microgrid demonstration Power Station, the typical island microgrid system model is built by using MATLAB/SIMULINK simulation software, and the regulation effect of battery energy storage system on the micro-grid power quality is studied and analyzed. The correctness of the conclusion is verified by demonstration project. The specific research contents are as follows: 1. The distributed power supply, battery modeling and control strategy are discussed, and the access and control methods of battery energy storage system are analyzed. According to the characteristics of distributed power generation and load in microgrid, the design method of storage battery capacity is put forward from the point of view of power demand. In order to avoid overcharging and overdischarge of batteries and to improve the cycle efficiency and life of batteries, a method for estimating the residual capacity of batteries is proposed. According to different battery types, different battery capacity and different series-parallel modes, the battery energy storage system is modeled and simulated. The power exchange capability of battery energy storage system under various battery configurations is analyzed. The island microgrid system without energy storage system is simulated. The wind speed and light resource fluctuation and the start-up and shutdown of photovoltaic system are studied. The influence on the power quality of microgrid. According to the random variation of solar energy resources, the start-up and shutdown of photovoltaic system and the starting and stopping of high power load, the effects of battery energy storage system on the power quality of microgrid and the improvement effect are studied and analyzed. The research results show that the battery energy storage system can significantly improve the power quality problems such as voltage and frequency fluctuation caused by distributed power supply, three-phase voltage imbalance, total harmonic distortion rate of bus voltage, etc. And the voltage fluctuation caused by the high power inductive load start-stop also has the very good treatment function. Finally, the conclusion of this paper is verified by analyzing the test data of Dongao island microgrid demonstration power station.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM912

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