本文關(guān)鍵詞：微電網(wǎng)光儲(chǔ)發(fā)電系統(tǒng)協(xié)調(diào)控制策略研究　出處：《太原理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 光伏發(fā)電 磷酸鐵鋰電池儲(chǔ)能系統(tǒng) 微電網(wǎng) 協(xié)調(diào)控制 dSPACE

【摘要】：隨著全球經(jīng)濟(jì)的快速增長(zhǎng),能源的需求量急劇擴(kuò)大,導(dǎo)致傳統(tǒng)化石能源逐步消耗殆盡,作為化石能源的替代品,可再生能源受到了越來越多的關(guān)注。分布式發(fā)電作為可再生能源利用的主要組成形式,其輸出功率具有間歇性與隨機(jī)性,大規(guī)模并網(wǎng)必然會(huì)對(duì)電網(wǎng)的安全和穩(wěn)定運(yùn)行造成沖擊和影響。因此,以分布式發(fā)電為基礎(chǔ)的微電網(wǎng)技術(shù)被眾多學(xué)者和研究機(jī)構(gòu)所重視。微電網(wǎng)不僅能大量接納可再生能源發(fā)電,緩解能源緊缺和環(huán)境危機(jī),而且有助于提高供電可靠性、增加供電系統(tǒng)的容量。為適應(yīng)大規(guī)模分布式發(fā)電接入微電網(wǎng)的需要,研究外部環(huán)境、負(fù)荷功率以及網(wǎng)絡(luò)結(jié)構(gòu)發(fā)生變化時(shí),如何協(xié)調(diào)控制儲(chǔ)能裝置、分布式電源以及變換器使微電網(wǎng)在不同運(yùn)行模式下都能滿足電能質(zhì)量的要求顯得尤為重要。本文緊緊圍繞光儲(chǔ)混合微電網(wǎng)裝置的研究與設(shè)計(jì),展開下述研究工作： (1)建立了光伏電池工程實(shí)用仿真模型,選用擾動(dòng)觀察法作為本文的最大功率點(diǎn)跟蹤(MPPT)控制算法,計(jì)算電路參數(shù),在Matlab/Simulink中搭建光伏發(fā)電系統(tǒng)仿真模型,對(duì)不同溫度和光照強(qiáng)度下的最大功率點(diǎn)跟蹤進(jìn)行了仿真。仿真結(jié)果驗(yàn)證了光伏模型和控制算法的靈敏性和有效性。 (2)介紹了磷酸鐵鋰電池儲(chǔ)能原理及優(yōu)勢(shì),建立了其等效電路模型,對(duì)電池容量進(jìn)行了定量計(jì)算,重點(diǎn)分析了Buck/Boost雙向變流器的工作原理并推導(dǎo)了小信號(hào)數(shù)學(xué)模型,在此基礎(chǔ)上,設(shè)計(jì)了電壓外環(huán)、電流內(nèi)環(huán)雙環(huán)控制方法,最后在Matlab/Simulink中搭建了仿真模型,對(duì)儲(chǔ)能充放電模式自動(dòng)轉(zhuǎn)換進(jìn)行了仿真,仿真結(jié)果驗(yàn)證了雙環(huán)控制策略的正確性。 (3)對(duì)微電網(wǎng)的運(yùn)行方式和控制策略進(jìn)行了分析,著重?cái)⑹隽宋㈦娋W(wǎng)微源級(jí)和系統(tǒng)級(jí)兩種控制策略,并在此基礎(chǔ)上,提出了適用于光儲(chǔ)混合微電網(wǎng)的協(xié)調(diào)控制策略。在Matlab/Simulink環(huán)境下搭建了光儲(chǔ)混合微電網(wǎng)的仿真模型,分析了并網(wǎng)模式、孤島模式和并網(wǎng)／孤網(wǎng)模式切換下的仿真結(jié)果。結(jié)果表明：當(dāng)外部環(huán)境、負(fù)荷功率以及網(wǎng)絡(luò)結(jié)構(gòu)發(fā)生變化時(shí),光儲(chǔ)混合微電網(wǎng)具有良好的動(dòng)態(tài)響應(yīng)能力,滿足微電網(wǎng)電能質(zhì)量要求,驗(yàn)證了所提出的光儲(chǔ)混合微電網(wǎng)協(xié)調(diào)控制策略的有效性,為下一步裝置實(shí)現(xiàn)提供了理論依據(jù)。 (4)基于dSPACE1006開發(fā)平臺(tái)設(shè)計(jì)了光儲(chǔ)混合微電網(wǎng)的實(shí)驗(yàn)平臺(tái),搭建了硬件電路并完成器件選型,并對(duì)dSPACE1006軟件控制部分進(jìn)行了設(shè)計(jì),包括信號(hào)采集處理單元、主控制單元、軟件保護(hù)單元、實(shí)時(shí)在線調(diào)整Control Desk界面和PWM控制信號(hào)生成單元。在低壓環(huán)境下進(jìn)行了并網(wǎng)模式和孤島模式下的變載實(shí)驗(yàn)。實(shí)驗(yàn)結(jié)果表明,所設(shè)計(jì)的主電路和提出的協(xié)調(diào)控制策略可以保證微電網(wǎng)在并網(wǎng)模式和孤網(wǎng)模式下均能滿足負(fù)荷的電能質(zhì)量要求。
[Abstract]:With the rapid growth of the global economy, the demand for energy expands rapidly, leading to the gradual depletion of traditional fossil energy, as a substitute for fossil energy. As the main form of renewable energy utilization, the output power of distributed generation is intermittent and random. Large-scale grid connection will inevitably impact and affect the safe and stable operation of power grid. Microgrid technology based on distributed generation has been paid attention to by many scholars and research institutions. Microgrid can not only accept a large number of renewable energy generation, alleviate the energy shortage and environmental crisis. In order to meet the needs of large-scale distributed generation and access to microgrid, the external environment, load power and network structure changes are studied. How to coordinate and control the energy storage device. Distributed power generation and converter make microgrid can meet the requirements of power quality in different operation modes. This paper focuses on the research and design of optical storage hybrid microgrid device. Undertake the following studies: 1) the practical simulation model of photovoltaic cell engineering is established. The disturbance observation method is chosen as the MPPT-based control algorithm for maximum power point tracking in this paper, and the circuit parameters are calculated. The simulation model of photovoltaic power generation system is built in Matlab/Simulink. The maximum power point tracking at different temperature and illumination intensity is simulated. The simulation results show that the photovoltaic model and the control algorithm are sensitive and effective. The energy storage principle and advantages of lithium iron phosphate battery are introduced, its equivalent circuit model is established, and the capacity of the battery is calculated quantitatively. The working principle of Buck/Boost bidirectional converter is analyzed and the small signal mathematical model is deduced. On this basis, the double loop control method of voltage outer loop and current inner loop is designed. Finally, the simulation model is built in Matlab/Simulink, and the automatic conversion of charge and discharge mode is simulated. The simulation results verify the correctness of the dual-loop control strategy. 3) the operation mode and control strategy of microgrid are analyzed, and two control strategies, micro-source level and system-level control strategy, are described emphatically, and on this basis. A coordinated control strategy for optical storage hybrid microgrid is proposed. The simulation model of optical storage hybrid microgrid under Matlab/Simulink environment is built and the grid-connected mode is analyzed. The simulation results of island mode and grid-connected / isolated mode switching show that the hybrid micro-grid has a good dynamic response capability when the external environment, load power and network structure change. To meet the power quality requirements of microgrid, the effectiveness of the proposed coordinated control strategy for hybrid optical storage microgrid is verified, which provides a theoretical basis for the next implementation of the device. 4) based on the dSPACE1006 development platform, the experiment platform of optical storage hybrid microgrid is designed, the hardware circuit is built and the device selection is completed. And the dSPACE1006 software control part is designed, including signal acquisition and processing unit, main control unit, software protection unit. The Control Desk interface and the PWM control signal generating unit are adjusted in real time and on-line. The load changing experiments in grid-connected mode and islanding mode are carried out in low-voltage environment. The experimental results show that. The designed main circuit and the proposed coordinated control strategy can ensure that both the grid-connected mode and the isolated mode of micro-grid can meet the power quality requirements of the load.
【學(xué)位授予單位】：太原理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM91

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本文編號(hào)：1401918