本文關(guān)鍵詞： 高滲透率 分布式光伏發(fā)電系統(tǒng) 鏈?zhǔn)脚渚W(wǎng) 電壓控制型逆變器　出處：《上海電力學(xué)院》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著傳統(tǒng)化石能源的消耗與人們對(duì)環(huán)境問題的普遍關(guān)注,太陽能等清潔能源利用受到各國重視,分布式光伏發(fā)電得以迅速發(fā)展。然而由于光伏發(fā)電具有間歇性與波動(dòng)性,大規(guī)模高滲透率分布式并網(wǎng)功率接入配電網(wǎng)將會(huì)影響配電網(wǎng)系統(tǒng)的穩(wěn)定運(yùn)行。本文首先通過搭建基于傳統(tǒng)電流控制型逆變器的分布式光伏發(fā)電系統(tǒng),探究高滲透率分布式光伏發(fā)電對(duì)鏈?zhǔn)脚潆娋W(wǎng)的影響。在分布式發(fā)電系統(tǒng)以單位功率因數(shù)接入鏈?zhǔn)脚潆娋W(wǎng)條件下,探討了在不同接入點(diǎn)、不同線路阻抗比、不同負(fù)荷時(shí)分布式光伏發(fā)電對(duì)配電網(wǎng)電壓的影響。其次,針對(duì)帶軸壓調(diào)節(jié)電壓控制型逆變器控制策略,本文提出了三種基本的分布式發(fā)電系統(tǒng)并網(wǎng)控制模式:同步發(fā)電機(jī)模式、最大功率控制模式與電壓控制模式。經(jīng)驗(yàn)證,三種控制模式均能夠提高分布式發(fā)電系統(tǒng)的并網(wǎng)控制能力。然后,通過對(duì)實(shí)驗(yàn)中出現(xiàn)的并網(wǎng)電流畸變現(xiàn)象進(jìn)行分析,探究與評(píng)估了高滲透率分布式并網(wǎng)功率對(duì)配電網(wǎng)電流質(zhì)量的影響。本文搭建了電壓控制型逆變器并網(wǎng)系統(tǒng)。控制不同的并網(wǎng)功率因數(shù),分析與評(píng)估分布式并網(wǎng)功率對(duì)配電網(wǎng)線路電壓與功率損耗的影響。在此基礎(chǔ)上,對(duì)比探討了四種典型功率調(diào)壓方法的優(yōu)劣。最后,基于分布式并網(wǎng)功率對(duì)配電網(wǎng)影響的評(píng)估結(jié)果,本文提出了兩種帶無功調(diào)節(jié)的分布式發(fā)電系統(tǒng)并網(wǎng)控制模式:最大功率電壓補(bǔ)償模式和無功補(bǔ)償模式。經(jīng)驗(yàn)證,兩種帶無功調(diào)節(jié)的并網(wǎng)控制模式,對(duì)高滲透率配電網(wǎng)均具有一定的優(yōu)化作用。通過探究在高滲透率條件下分布式發(fā)電系統(tǒng)與配電網(wǎng)間的相互作用機(jī)理,本文研究了分布式光伏發(fā)電系統(tǒng)的五種并網(wǎng)控制模式。五種并網(wǎng)模式均基于帶軸壓調(diào)節(jié)電壓控制型逆變器控制策略提出,增強(qiáng)了配電網(wǎng)對(duì)新能源的接納能力,且能夠提高分布式光伏發(fā)電系統(tǒng)的網(wǎng)源互動(dòng)能力。本文的研究成果對(duì)分布式發(fā)電系統(tǒng)具有理論參考和實(shí)踐應(yīng)用意義。
[Abstract]:With the consumption of traditional fossil energy and the widespread attention to environmental problems, the utilization of clean energy such as solar energy has been paid attention to by many countries, and distributed photovoltaic power has been developed rapidly. However, photovoltaic power generation is intermittent and volatile. Large scale and high permeability distributed grid-connected power access will affect the stable operation of distribution network system. Firstly, a distributed photovoltaic power generation system based on traditional current-controlled inverter is built in this paper. The influence of distributed photovoltaic generation with high permeability on chain distribution network is investigated. Under the condition that the distributed generation system is connected to the chain distribution network with unit power factor, the different line impedance ratio and different access point are discussed. The influence of distributed photovoltaic power generation on distribution network voltage under different loads. Secondly, aiming at the control strategy of voltage control inverter with axial voltage regulation, three basic grid-connected control modes of distributed generation system: synchronous generator mode are proposed in this paper. The maximum power control mode and voltage control mode. It is proved that the three control modes can improve the grid-connected control ability of distributed generation system. Then, the distortion phenomenon of grid-connected current in the experiment is analyzed. The influence of distributed grid-connected power with high permeability on the current quality of distribution network is investigated and evaluated. In this paper, a voltage-controlled inverter grid-connected system is built to control different grid-connected power factors. The influence of distributed grid-connected power on the voltage and power loss of distribution network is analyzed and evaluated. On this basis, the advantages and disadvantages of four typical power regulation methods are compared and discussed. Based on the evaluation results of the influence of distributed grid-connected power on distribution network, this paper presents two grid-connected control modes of distributed generation system with reactive power regulation: maximum power voltage compensation mode and reactive power compensation mode. Two kinds of grid-connected control modes with reactive power regulation can optimize the distribution network with high permeability. By exploring the interaction mechanism between distributed generation system and distribution network under the condition of high permeability, two kinds of grid-connected control modes with reactive power regulation are discussed. In this paper, five grid-connected control modes of distributed photovoltaic power generation system are studied. The five grid-connected modes are all based on the control strategy of voltage control inverter with axial voltage regulation, which enhances the ability of the distribution network to accept new energy. The research results of this paper have theoretical reference and practical significance for distributed photovoltaic power generation system.
【學(xué)位授予單位】：上海電力學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TM615

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本文編號(hào)：1516834