本文選題：光伏發(fā)電 + 電壓穩(wěn)定��； 參考：《鄭州大學(xué)》2014年碩士論文

【摘要】：目前，在能源和環(huán)境的雙重壓力下，發(fā)展利用清潔新能源已是迫在眉睫。太陽(yáng)能發(fā)電的諸多綜合優(yōu)勢(shì)如無區(qū)域性、總量豐富、清潔零污染等特點(diǎn)，成為當(dāng)前最有發(fā)展前景和價(jià)值的新型能源，太陽(yáng)能發(fā)電中的光伏發(fā)電并網(wǎng)利用方式是重點(diǎn)發(fā)展的方向。使用光伏發(fā)電必須研究并網(wǎng)系統(tǒng)的電壓穩(wěn)定問題。光伏發(fā)電并網(wǎng)系統(tǒng)的電壓穩(wěn)定與否，很大程度上決定著整個(gè)光伏發(fā)電的未來發(fā)展與使用。 本文首先以光伏發(fā)電并入無窮大系統(tǒng)為對(duì)象，分別研究了光伏發(fā)電并網(wǎng)系統(tǒng)的有功、無功及負(fù)荷改變時(shí)，系統(tǒng)電壓的變化情況。接下來對(duì)光伏發(fā)電接入三機(jī)九節(jié)點(diǎn)系統(tǒng)進(jìn)行了定點(diǎn)分析。分析中從負(fù)荷模型的有無、等值發(fā)電機(jī)的零功率及滿功率、光伏發(fā)電的零、滿功率等幾方面做了較深入的分析和對(duì)比討論。具體內(nèi)容如下： (1)在對(duì)光伏發(fā)電系統(tǒng)模型分類介紹的基礎(chǔ)上，根據(jù)本文所研究的內(nèi)容，分別建立無窮大系統(tǒng)的各部分的模型，，包括光伏發(fā)電環(huán)節(jié)的整體模型、負(fù)荷綜合模型、光伏發(fā)電系統(tǒng)綜合模型，并對(duì)所建的光伏發(fā)電系統(tǒng)并網(wǎng)模型進(jìn)行了仿真驗(yàn)證； (2)通過得到的無窮大系統(tǒng)的電壓變化曲線，對(duì)比分析光伏發(fā)電接入系統(tǒng)后，改變系統(tǒng)有功、負(fù)荷，得到系統(tǒng)電壓變化情況。并在等值發(fā)電機(jī)接入后，對(duì)比分析光伏發(fā)電和等值發(fā)電機(jī)的電壓變化結(jié)果。 (3)建立了三機(jī)九節(jié)點(diǎn)系統(tǒng)的簡(jiǎn)化電路。通過將光伏發(fā)電、負(fù)荷、等值發(fā)電機(jī)分別接入同一節(jié)點(diǎn)分析系統(tǒng)電壓的變化情況。 綜合以上研究結(jié)果，得到了將光伏發(fā)電并入系統(tǒng)不會(huì)造成電壓失穩(wěn)，且具有提高系統(tǒng)電壓穩(wěn)定級(jí)別的結(jié)論。 本文研究結(jié)果對(duì)光伏發(fā)電并網(wǎng)的調(diào)度管理有一定參考價(jià)值。
[Abstract]:At present, under the dual pressure of energy and environment, the development and utilization of clean new energy is imminent. Many comprehensive advantages of solar power generation, such as non regional, abundant, clean and zero pollution, have become the most promising new energy sources, and the grid utilization of photovoltaic power generation in solar power generation is the key issue. The direction of the exhibition. The voltage stability of the grid system must be studied using the photovoltaic power generation. The voltage stability of the grid connected system of photovoltaic power generation determines the future development and use of the whole photovoltaic power generation.
This paper first studies the change of the system voltage when the photovoltaic power generation system is active, reactive and load, and the system voltage is changed when the photovoltaic power generation is connected to the infinite system. Then the fixed point analysis is carried out on the three machine and nine node system which is connected with the photovoltaic power generation. The full power, the zero and full power of photovoltaic power generation have been analyzed and discussed in more detail.
(1) on the basis of the classification of the photovoltaic power system model, according to the contents of this paper, the models of each part of the infinite system are established, including the whole model of the photovoltaic power generation link, the load synthesis model, the integrated model of the photovoltaic power generation system, and the simulation verification of the grid connected model of the photovoltaic power generation system.
(2) by comparing and analyzing the voltage variation curve of the infinite system, after comparing and analyzing the photovoltaic power generation access system, the system active power and load are changed and the voltage change of the system is obtained. And the voltage variation results of the photovoltaic power generation and the equivalent generator are compared and analyzed after the equal generator is connected.
(3) the simplified circuit of the three machine nine node system is set up. The voltage changes of the same node analysis system are connected by the photovoltaic power generation, the load and the equivalent generator respectively.
Based on the above research results, it is concluded that incorporating PV generation into the system will not cause voltage instability and improve the voltage stability level of the system.
The research results in this paper have some reference value for dispatching management of grid connected photovoltaic power generation.
【學(xué)位授予單位】：鄭州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM615

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本文編號(hào)：1994202