本文選題：SCADA數(shù)據(jù)　切入點：風電并網(wǎng)　出處：《華北電力大學》2014年碩士論文　論文類型：學位論文

【摘要】：當前，風電大規(guī)模并網(wǎng)使風力發(fā)電對電網(wǎng)影響越來越大，導致其他電源需要更高的調(diào)節(jié)能力來保證電網(wǎng)的調(diào)度運行和電網(wǎng)的故障水平與穩(wěn)定性等�？茖W評價并網(wǎng)風電機組的運行狀況，對完成大規(guī)模安全風力發(fā)電穩(wěn)定并網(wǎng)運行擁有很大的科學意義。本文主要從風電功率特性的研究、風電機組性能評估模型的建立以及風電棄風電量評估模型的建立幾個方面，進行了并網(wǎng)風電機組運行狀態(tài)評估，開展了以下工作： （1）基于研究風電機組并網(wǎng)運行的基本原理，分析了并網(wǎng)風電機組運行基本信息，主要包括風電機組基本結(jié)構(gòu)、基本類型和工作原理以及在線狀態(tài)監(jiān)測基本參量、主要部件的故障機理等； （2）針對并網(wǎng)風電機組的功率特性，提出了風電功率量化指標分析及利用正態(tài)分布函數(shù)擬合風電功率min級分量概率密度分布研究方法。主要包括：第一，，定義量化指標，并從差分時間尺度和風電場裝機容量兩個方面分析風電波動的特性；第二，選用二次滾動平均法分析風電場輸出功率的min級分量，同時利用正態(tài)分布函數(shù)擬合min級分量概率密度分布，研究不同裝機容量風電場和選擇不同滾動窗口時風電功率min分量的概率分布； （3）考慮到風電機組本身運行的性能特性，研究并網(wǎng)運行風電機組性能的評估模型。在常規(guī)模糊數(shù)學評判模型基礎(chǔ)上，首先，通過灰色系統(tǒng)理論獲取指標權(quán)值，并引入變權(quán)理論對偏離指標進行修正；然后，采用劣化度指標建立隸屬函數(shù)，建立基于SCADA（Supervisory Control and Data Acquisition）數(shù)據(jù)的風電機組性能狀態(tài)評估模型，并通過實例驗證； （4）提出棄風電量的評估模型。該方法是基于SCADA實時監(jiān)測數(shù)據(jù)，對風速進行修正，計算風電場實際功率，從而確定風電場的理論發(fā)電量，并根據(jù)實際發(fā)電量，得到風電場的棄風電量。 以上研究成果可應(yīng)用于風電機組并網(wǎng)運行狀態(tài)評估，將為風電并網(wǎng)提供理論參考，保證并網(wǎng)風力發(fā)電機組的高可靠性，對實現(xiàn)風電機組大規(guī)模并網(wǎng)具有重要的科學實用價值和研究意義。
[Abstract]:At present, wind power generation is becoming more and more important to the power grid because of the large-scale grid connection of wind power. Therefore, other power sources need higher regulation ability to ensure the dispatching operation of the power network and the fault level and stability of the power network, etc. Scientific evaluation of the operation status of grid-connected wind turbines, It is of great scientific significance to complete the stable grid operation of large-scale safe wind power generation. This paper mainly focuses on the research of wind power characteristics, the establishment of wind turbine performance evaluation model and the establishment of wind power abandoned wind power evaluation model. The operation status of grid-connected wind turbine is evaluated, and the following work is carried out:. 1) based on the study of the basic principle of wind turbine grid connected operation, the basic information of wind turbine operation is analyzed, including the basic structure, basic type and working principle of wind turbine unit, and the basic parameters of on-line condition monitoring. Failure mechanism of main components; 2) aiming at the power characteristic of grid-connected wind turbine, the paper puts forward a method to analyze the quantization index of wind power and to fit the probability density distribution of min component of wind power by normal distribution function. The main contents are as follows: firstly, the quantization index is defined. The characteristics of wind power fluctuation are analyzed from two aspects: difference time scale and wind farm installed capacity. Secondly, the min stage component of wind farm output power is analyzed by using the quadratic rolling average method. At the same time, the probability density distribution of min stage component is fitted by normal distribution function, and the probability distribution of wind power min component under different installed capacity wind farm and different rolling window is studied. Considering the performance characteristics of wind turbine, the evaluation model of wind turbine performance in grid-connected operation is studied. On the basis of conventional fuzzy mathematics evaluation model, the index weights are obtained by grey system theory. The variable weight theory is introduced to modify the deviation index, and then the membership function is established by using the deterioration degree index, and the performance evaluation model of wind turbine based on SCADA(Supervisory Control and Data requirements data is established, and the model is verified by an example. This method is based on the real-time monitoring data of SCADA, modifies the wind speed, calculates the actual power of the wind farm, and determines the theoretical power generation of the wind farm. Get the abandoned wind power from the wind farm. The above research results can be applied to the evaluation of wind turbine grid-connected operation status, which will provide a theoretical reference for wind power grid connection and ensure the high reliability of grid-connected wind turbine. It has important scientific and practical value and research significance for realizing large-scale grid connection of wind turbine.
【學位授予單位】：華北電力大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM315

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