發(fā)布時(shí)間：2019-01-10 16:05

【摘要】：大力發(fā)展風(fēng)能太陽能等可再生能源,減少溫室氣體排放,建設(shè)環(huán)境友好型國家對(duì)我國的國家能源安全、環(huán)境改善、經(jīng)濟(jì)的可持續(xù)發(fā)展等具有非常重要的戰(zhàn)略意義。與此同時(shí),儲(chǔ)能系統(tǒng)由于其能夠靈活快速地調(diào)整有功／無功功率的吞吐、平抑負(fù)荷波動(dòng)、提高電能質(zhì)量等一系列優(yōu)點(diǎn),也得到了廣泛關(guān)注和研究。相對(duì)的,儲(chǔ)能系統(tǒng)直流側(cè)電壓/SOC均衡控制這一關(guān)乎儲(chǔ)能系統(tǒng)運(yùn)行質(zhì)量的重要問題便顯得日益重要。特別是鏈?zhǔn)絻?chǔ)能系統(tǒng),由于其具有結(jié)構(gòu)簡(jiǎn)單且容易重構(gòu)、等效輸出電壓高、等效開關(guān)頻率高和輸出電能質(zhì)量好等一系列顯著優(yōu)點(diǎn),而逐漸成為大容量?jī)?chǔ)能系統(tǒng)中的研究熱點(diǎn)。然而,鏈?zhǔn)絻?chǔ)能系統(tǒng)高質(zhì)量運(yùn)行的關(guān)鍵在于系統(tǒng)充放電時(shí)直流側(cè)各儲(chǔ)能單元之間的能量均衡(如各蓄電池組間的荷電狀態(tài)(SOC)的均衡)。本文首先在綜合分析了各種多電平變換器調(diào)制策略的基礎(chǔ)上,針對(duì)鏈?zhǔn)絻?chǔ)能系統(tǒng)的均衡控制提出了一種基于輔助功率環(huán)的單相級(jí)聯(lián)多電平儲(chǔ)能系統(tǒng),并提出了一種適合于該拓?fù)涞碾p頻載波移相PWM調(diào)制方法。通過該輔助功率環(huán)和雙頻載波移相PWM調(diào)制方法,提出了可以有效實(shí)現(xiàn)級(jí)聯(lián)多電平儲(chǔ)能系統(tǒng)直流側(cè)各儲(chǔ)能單元之間功率交換的調(diào)控機(jī)制。此外,文中還詳細(xì)論述了系統(tǒng)輸出濾波器和輔助功率環(huán)中調(diào)諧濾波器的設(shè)計(jì)方法。論文對(duì)基于輔助功率環(huán)的級(jí)聯(lián)多電平儲(chǔ)能系統(tǒng)的拓?fù)浼捌湫铍姵豐OC均衡控制方法進(jìn)行了MATLAB/SIMULINK仿真分析,同時(shí)以蓄電池為儲(chǔ)能元件,建立了一個(gè)由三個(gè)H橋模塊級(jí)聯(lián)而成的1kW單相蓄電池儲(chǔ)能系統(tǒng)實(shí)驗(yàn)平臺(tái)。仿真和實(shí)驗(yàn)結(jié)果驗(yàn)證了雙頻載波移相PWM調(diào)制方法及功率交換機(jī)制的可行性以及理論分析的正確性。
[Abstract]:It is of great strategic significance to develop renewable energy such as wind and solar energy, reduce greenhouse gas emissions and build environment-friendly countries for our country's energy security, environmental improvement and sustainable economic development. At the same time, energy storage system has been paid more and more attention because it can adjust active / reactive power huff and puff flexibly and quickly, suppress load fluctuation, improve power quality and so on. In contrast, DC side voltage / SOC equalization control of energy storage system is becoming more and more important. Especially for chain energy storage system, it has a series of remarkable advantages, such as simple structure, easy reconfiguration, high equivalent output voltage, high equivalent switching frequency and good output power quality, and has gradually become a research hotspot in large capacity energy storage system. However, the key to high quality operation of chain energy storage system lies in the energy balance between DC side energy storage units (such as the charge state (SOC) balance between battery groups) during charging and discharging of the system. Based on the comprehensive analysis of various modulation strategies of multilevel converters, a single-phase cascaded multilevel energy storage system based on auxiliary power loop is proposed in this paper for the equalization control of chain energy storage systems. A dual frequency carrier phase-shifted PWM modulation method is proposed for this topology. By means of the auxiliary power loop and the dual-frequency carrier phase-shifted PWM modulation method, an effective power exchange control mechanism between the DC side energy storage units of cascaded multilevel energy storage system is proposed. In addition, the design method of the system output filter and the tuning filter in the auxiliary power loop are discussed in detail. In this paper, the topology of cascade multilevel energy storage system based on auxiliary power loop and the SOC equalization control method of battery are simulated and analyzed by MATLAB/SIMULINK. At the same time, the battery is used as energy storage element. An experimental platform for energy storage system of 1kW single-phase battery is established, which consists of three H-bridge modules. Simulation and experimental results verify the feasibility of dual-frequency carrier phase-shifted PWM modulation method and power exchange mechanism, as well as the correctness of theoretical analysis.
【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】：2016
【分類號(hào)】：TM46

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本文編號(hào)：2406514