【摘要】：近年來,中國風(fēng)電產(chǎn)業(yè)發(fā)展保持高速增長勢(shì)頭,在“建設(shè)大基地、融入大電網(wǎng)”的風(fēng)電發(fā)展戰(zhàn)略指導(dǎo)下,我國風(fēng)電已由小規(guī)模分散開發(fā)、就地消納逐步向大規(guī)模集中開發(fā)、遠(yuǎn)距離高壓輸送方向發(fā)展。然而,在我國風(fēng)電規(guī)�；焖侔l(fā)展的同時(shí),發(fā)展過程中的一些矛盾逐漸顯露出來,部分地區(qū)由于風(fēng)電開發(fā)過于集中,并網(wǎng)外送通道建設(shè)滯后、系統(tǒng)調(diào)峰能力不足等原因,導(dǎo)致風(fēng)電并網(wǎng)和消納困難,棄風(fēng)限電問題日益嚴(yán)峻。在短期內(nèi)因電網(wǎng)消納能力有限而致使風(fēng)電棄風(fēng)的情況下,如何協(xié)調(diào)控制風(fēng)電場(chǎng)群內(nèi)各單場(chǎng)以及場(chǎng)內(nèi)各機(jī)組的有功出力,實(shí)現(xiàn)各單場(chǎng)和場(chǎng)內(nèi)各機(jī)組之間出力任務(wù)的優(yōu)化分配,成為當(dāng)前急需解決的問題。開展這一領(lǐng)域的研究對(duì)于提高電網(wǎng)的風(fēng)電消納能力,減少棄風(fēng)損失電量,以及提升風(fēng)電場(chǎng)群調(diào)度運(yùn)行的精細(xì)化水平具有現(xiàn)實(shí)意義。本文首先分析了風(fēng)電功率的波動(dòng)特性,以均值、標(biāo)準(zhǔn)差、一階差分等為統(tǒng)計(jì)量指標(biāo),基于實(shí)測(cè)數(shù)據(jù)研究了單場(chǎng)、場(chǎng)群以及全省的風(fēng)電出力波動(dòng)及概率分布情況。在此基礎(chǔ)上,研究了導(dǎo)致電網(wǎng)限風(fēng)的主要原因,從電網(wǎng)的調(diào)峰能力、風(fēng)電的消納能力和傳輸通道受限三個(gè)方面分析了影響電網(wǎng)限風(fēng)的主要因素;然后,在分析了風(fēng)電場(chǎng)有功調(diào)度技術(shù)要求及運(yùn)行控制的基礎(chǔ)上,研究了風(fēng)電場(chǎng)的有功功率分配策略,建立了三種風(fēng)電功率分配策略模型,用于限風(fēng)時(shí)段下分配各個(gè)風(fēng)電場(chǎng)有功出力任務(wù),通過計(jì)算風(fēng)電場(chǎng)群的總出力及相應(yīng)的棄風(fēng)損失電量對(duì)上述策略的可行性和優(yōu)越性進(jìn)行分析,為風(fēng)電的調(diào)控提供優(yōu)化解決方案。最后,提出一種適用于限風(fēng)情況下的風(fēng)電場(chǎng)群有功分層協(xié)調(diào)控制策略�；诜謱臃謪^(qū)思想,建立新型風(fēng)電場(chǎng)群有功分配兩層調(diào)控模型,通過協(xié)調(diào)控制風(fēng)電場(chǎng)群內(nèi)各單場(chǎng)和場(chǎng)內(nèi)各機(jī)組的有功出力,實(shí)現(xiàn)風(fēng)電限值的逐層分解和有功出力任務(wù)的分步執(zhí)行。以基于標(biāo)準(zhǔn)遺傳算法的改進(jìn)的遺傳算法對(duì)模型進(jìn)行求解,優(yōu)化分配各單場(chǎng)和機(jī)組出力任務(wù)。以東北某實(shí)際風(fēng)電場(chǎng)群為例驗(yàn)證所提策略的可行性和有效性。通過算例分析表明,所提策略能夠?qū)崿F(xiàn)各單場(chǎng)和場(chǎng)內(nèi)各機(jī)組之間出力任務(wù)的優(yōu)化分配,提高了電網(wǎng)的風(fēng)電消納能力以及系統(tǒng)運(yùn)行的經(jīng)濟(jì)性。
[Abstract]:In recent years, China's wind power industry has maintained a high growth momentum. Under the guidance of the wind power development strategy of "building large bases and integrating into large power grids," China's wind power has been developed from a small scale to a decentralized development, and local absorption has gradually turned to large-scale centralized development. Long distance high pressure transportation development. However, with the rapid development of wind power in our country, some contradictions in the process of wind power development are gradually revealed. Due to the concentration of wind power development in some areas, the construction of transmission channels to the outside of the power grid is lagging behind, and the peak shaving capacity of the system is insufficient, and so on. As a result of wind power grid connection and absorption difficulties, abandon wind power limit problem is becoming more and more serious. In the short term, when wind power is abandoned due to the limited absorption capacity of the power grid, how to coordinate and control the active power output of each single field in the wind farm group and the units in the field, so as to realize the optimal distribution of the generating force task between the single field and the field unit. It has become an urgent problem to be solved. The research in this field is of practical significance for improving the wind power absorption capacity of the power grid, reducing the power loss of abandoned wind, and improving the fine level of wind farm group dispatching and operation. In this paper, the fluctuation characteristics of wind power are analyzed at first. Taking mean value, standard deviation and first order difference as statistic indexes, the fluctuation and probability distribution of wind power output force in single field, field group and whole province are studied based on the measured data. On this basis, the main causes of wind limiting are studied, and the main factors that affect the wind limitation are analyzed from three aspects: peak shaving capacity, wind absorption capacity and transmission channel limitation. On the basis of analyzing the technical requirements of active power dispatching and operation control of wind farm, the active power allocation strategy of wind farm is studied, and three kinds of wind power distribution strategy models are established. It is used to distribute the active power of each wind farm during the wind limiting period. The feasibility and superiority of the above strategy are analyzed by calculating the total output force of the wind farm group and the corresponding power loss of the wind farm group, thus providing an optimized solution for the regulation and control of wind power. Finally, an active power hierarchical coordinated control strategy for wind farms is proposed. Based on the idea of stratification and partitioning, a two-layer control model of active power distribution in a new wind farm group is established, and the active power output of each single field and unit in the wind farm cluster is controlled by coordination. The wind power limit is decomposed layer by layer and the active power output task is carried out step by step. The improved genetic algorithm based on the standard genetic algorithm is used to solve the model, and each single field and unit output task is optimized. The feasibility and effectiveness of the proposed strategy are verified by an actual wind farm group in Northeast China. The analysis of examples shows that the proposed strategy can achieve the optimal allocation of the output tasks among the units in each field and field, and improve the wind power absorption capacity of the power grid and the economy of the system operation.
【學(xué)位授予單位】：東北電力大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM614

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相關(guān)期刊論文 前10條

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本文編號(hào)：2225421