【摘要】：隨著風(fēng)力發(fā)電技術(shù)不斷發(fā)展,風(fēng)電功率的隨機(jī)性和波動(dòng)性會(huì)對(duì)風(fēng)電場(chǎng)的無功電壓帶來影響,進(jìn)而影響電力系統(tǒng)的安全穩(wěn)定運(yùn)行。目前,對(duì)于風(fēng)電場(chǎng)的無功電壓運(yùn)行要求和考核力度也在不斷加大,需要通過配置無功補(bǔ)償裝置保證風(fēng)電場(chǎng)的無功電壓穩(wěn)定。在實(shí)際工程中,往往綜合利用電容器組和動(dòng)態(tài)無功補(bǔ)償裝置對(duì)風(fēng)電場(chǎng)進(jìn)行集中補(bǔ)償,如何合理規(guī)劃配置這兩類無功補(bǔ)償裝置,在經(jīng)濟(jì)性和補(bǔ)償效果上達(dá)到最優(yōu),需要進(jìn)一步研究。本文首先介紹了風(fēng)電場(chǎng)內(nèi)的無功設(shè)備,并分析各個(gè)無功設(shè)備在實(shí)際運(yùn)行中的無功調(diào)節(jié)特性;通過實(shí)際風(fēng)電場(chǎng)算例,研究分析了風(fēng)電場(chǎng)無功電壓特性,以此說明風(fēng)電場(chǎng)無功補(bǔ)償裝置配置的必要性。針對(duì)風(fēng)電場(chǎng)無功規(guī)劃的場(chǎng)景問題,通過基于動(dòng)態(tài)時(shí)間彎曲的層次聚類法,對(duì)平均風(fēng)電功率曲線進(jìn)行聚類分析,從中提取典型場(chǎng)景及其概率,用以描述風(fēng)電功率的整體波動(dòng)特性;并且引入局部波動(dòng)數(shù)值的概念,利用局部波動(dòng)數(shù)值的概率分布來表征風(fēng)電功率的局部波動(dòng)特性。為了使所配置的無功補(bǔ)償裝置最大限度滿足風(fēng)電場(chǎng)實(shí)際運(yùn)行的無功需求,本文建立兩階段無功優(yōu)化模型,有效地處理離散無功設(shè)備和動(dòng)態(tài)無功補(bǔ)償裝置在時(shí)間尺度上的協(xié)調(diào)配合問題,并分別采用遺傳算法和原對(duì)偶內(nèi)點(diǎn)法求解;在此基礎(chǔ)上,結(jié)合所構(gòu)造的無功規(guī)劃場(chǎng)景,進(jìn)一步提出風(fēng)電場(chǎng)無功二層規(guī)劃模型,綜合考慮經(jīng)濟(jì)性和運(yùn)行穩(wěn)定性,對(duì)無功補(bǔ)償裝置進(jìn)行優(yōu)化配置。最后通過實(shí)際算例驗(yàn)證本文方法的合理性和實(shí)用性。
[Abstract]:With the development of wind power generation technology, the randomness and fluctuation of wind power will affect the reactive power and voltage of wind farm, and then affect the safe and stable operation of power system. At present, the reactive power and voltage operation requirements and assessment of wind farms are also increasing, so it is necessary to ensure the stability of reactive power and voltage of wind farms through the allocation of reactive power compensation devices. In the actual project, the condenser bank and the dynamic reactive power compensator are often used to compensate the wind farm centrally. How to plan and dispose these two kinds of reactive power compensator reasonably, the economy and the compensation effect are optimized. Further study is needed. In this paper, the reactive power equipment in wind farm is introduced, and the reactive power regulation characteristics of each reactive power equipment in actual operation are analyzed. In this paper, the reactive power and voltage characteristics of wind farm are studied and analyzed by an example of actual wind farm, and the necessity of configuration of reactive power compensator in wind farm is explained. Aiming at the scenario problem of reactive power planning in wind farm, the average wind power curve is analyzed by hierarchical clustering method based on dynamic time bending, and the typical scenarios and their probabilities are extracted from them to describe the overall fluctuation characteristics of wind power. The concept of local wave value is introduced, and the probability distribution of local wave value is used to characterize the local fluctuation characteristic of wind power. In order to maximize the reactive power requirement of wind farm, a two-stage reactive power optimization model is established in this paper. The coordination problem of discrete reactive power equipment and dynamic reactive power compensator on time scale is effectively dealt with, and the genetic algorithm and the original dual interior point method are used to solve the problem, respectively. On this basis, combined with the constructed reactive power planning scenario, a two-layer reactive power planning model for wind farm is proposed. Considering the economy and operation stability, the reactive power compensator is configured optimally. Finally, the rationality and practicability of this method are verified by practical examples.
【學(xué)位授予單位】：華北電力大學(xué)(北京)
【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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