本文選題：微電網(wǎng) + 數(shù)學(xué)模型�。� 參考：《華南理工大學(xué)》2014年碩士論文

【摘要】：當(dāng)前電力系統(tǒng)承受來自傳統(tǒng)化石能源短缺和環(huán)境污染的雙重壓力，促使各種新能源發(fā)電技術(shù)(例如風(fēng)力發(fā)電、光伏發(fā)電等)的迅速發(fā)展。新能源發(fā)電的單機(jī)規(guī)模較小，適合以分布式電源(distributed generator，DG)的形式接入中、低壓系統(tǒng)，就近向負(fù)荷提供靈活、經(jīng)濟(jì)、環(huán)保的電能。由于不同的DG的特性差異顯著，傳統(tǒng)電網(wǎng)在安全穩(wěn)定、控制、優(yōu)化調(diào)度等方面都受到前所未有的挑戰(zhàn)，微電網(wǎng)為這些問題提供了有效的解決方案。本文主要圍繞微電網(wǎng)的經(jīng)濟(jì)運(yùn)行優(yōu)化問題進(jìn)行了研究。研究了微電網(wǎng)孤島經(jīng)濟(jì)運(yùn)行優(yōu)化、并網(wǎng)經(jīng)濟(jì)運(yùn)行優(yōu)化以及計(jì)及運(yùn)行方式切換的微電網(wǎng)經(jīng)濟(jì)運(yùn)行優(yōu)化問題。本文主要工作和研究成果如下： 1.構(gòu)建一種含儲(chǔ)能的風(fēng)、光、微型燃?xì)廨啓C(jī)的微電網(wǎng)孤島經(jīng)濟(jì)運(yùn)行優(yōu)化模型，以系統(tǒng)運(yùn)行成本最小為目標(biāo)，滿足功率平衡約束的同時(shí)，考慮網(wǎng)絡(luò)、安全等約束，例如爬坡約束、潮流約束、蓄電池的荷電狀態(tài)和充放電電流約束、蓄電池的上一時(shí)刻與下一時(shí)刻荷電狀態(tài)關(guān)系約束等�；贑++/GAMS編程進(jìn)行算例仿真，驗(yàn)證了所提模型的合理性，為微電網(wǎng)的風(fēng)、光、儲(chǔ)及微型燃?xì)廨啓C(jī)的聯(lián)合孤島經(jīng)濟(jì)運(yùn)行提供參考。 2.研究了微電網(wǎng)并網(wǎng)運(yùn)行時(shí)的經(jīng)濟(jì)運(yùn)行優(yōu)化問題，以微電網(wǎng)并網(wǎng)運(yùn)行時(shí)的系統(tǒng)總成本最低為目標(biāo)，在充分考慮分布式電源自身的特性約束及網(wǎng)絡(luò)安全約束的同時(shí)，，討論分析平均電價(jià)、峰谷電價(jià)和實(shí)時(shí)電價(jià)對(duì)微電網(wǎng)運(yùn)行成本的影響，降低運(yùn)行成本，充分利用微電網(wǎng)與主網(wǎng)互動(dòng)的特性。結(jié)合實(shí)際的微電網(wǎng)模型，給出并網(wǎng)運(yùn)行時(shí)的優(yōu)化調(diào)度策略，通過C++/GAMS對(duì)所建模型進(jìn)行優(yōu)化求解，驗(yàn)證所建模型的合理性，為微電網(wǎng)并網(wǎng)運(yùn)行提供參考。 3.提出了一種微電網(wǎng)孤島-并網(wǎng)統(tǒng)一優(yōu)化模型，以并網(wǎng)模型作為主問題，孤島問題為子問題，通過割集1和割集2來聯(lián)系主問題與子問題，設(shè)計(jì)了一種T-t規(guī)則，用GAMS編程對(duì)所提建模型進(jìn)行求解，驗(yàn)證所建模型的合理性。 最后對(duì)全文工作進(jìn)行了總結(jié)，概括了本文的主要研究成果，指出了今后進(jìn)一步研究方向。 本文研究工作得到了“以多環(huán)節(jié)綜合互動(dòng)為特征的智能電網(wǎng)綜合示范工程”國家科技支撐計(jì)劃(2013BAA01B02)以及國家自然科學(xué)基金(51307063)的資助。
[Abstract]:The current power system is under the double pressure from the shortage of traditional fossil energy and environmental pollution, which promotes the rapid development of various new energy generation technologies (such as wind power generation, photovoltaic power generation, etc.).The single machine of new energy generation is small and suitable for medium and low voltage system in the form of distributed distributed generator and DGG, which provides flexible, economical and environmentally friendly electric energy to the nearest load.Due to the remarkable differences in the characteristics of different DG, the traditional power grid is facing unprecedented challenges in the aspects of safety and stability, control and optimal dispatching, etc. Microgrid provides an effective solution to these problems.This paper focuses on the economic operation optimization of microgrid.In this paper, the optimization of isolated island economy operation, the economic operation optimization of grid-connected grid and the economic operation optimization of microgrid with the consideration of switching operation mode are studied.The main work and research results of this paper are as follows:1.A wind, light and micro gas turbine microgrid islanding economic operation optimization model is constructed, which takes the minimum operating cost of the system as the goal, satisfies the power balance constraints, and considers the network, security and other constraints, such as climbing constraints.Power flow constraints, charge and discharge current constraints of the battery, the relationship between the first and the next moment of the storage battery, and so on.The simulation results based on C / GAMS program verify the rationality of the proposed model and provide a reference for the wind, light, storage and micro gas turbine combined island economic operation.2.In this paper, the optimization problem of economic operation of microgrid in grid-connected operation is studied. Aiming at the lowest total cost of microgrid, the characteristic constraints of distributed power generation and network security constraints are fully considered at the same time.The effects of average electricity price, peak and valley price and real time price on the operation cost of microgrid are discussed, and the characteristics of interaction between microgrid and main network are fully utilized.Combined with the actual microgrid model, the optimal scheduling strategy for grid-connected operation is given. The model is optimized and solved by C / GAMS, and the rationality of the model is verified, which provides a reference for the grid-connected operation of micro-grid.3.In this paper, a unified optimization model of islanding and grid-connected microgrid is proposed. Taking the grid-connected model as the main problem and the islanding problem as the sub-problem, a T-t rule is designed by using the cut-set 1 and cut-set 2 to connect the main problem and the sub-problem.The proposed model is solved by GAMS programming, and the rationality of the proposed model is verified.Finally, the paper summarizes the work of this paper, summarizes the main research results, and points out the future research direction.The research work is supported by the National Science and Technology support Program (2013BAA01B02) and the National Natural Science Foundation of China (51307063).
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM732

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