【摘要】：相對傳統的常規(guī)能源,風能是一種可再生的、成本低且環(huán)境友好的新能源。目前風力發(fā)電的并網容量在不斷的擴大,大規(guī)模的風電并網后對電網所帶來的影響也在不斷的引起人們的關注。電網的風電接納能力是規(guī)劃和建設風電場時必須要考慮的重要因素之一,而如何求解風電接納能力以及找出影響風電接納能力的因素對風電并網的研究十分重要。本文主要研究了電網風電接納能力的約束條件以及影響因素,并最終給出了研究風電接納能力的一般思路。 首先,介紹了電力系統調峰的相關概念、常規(guī)電源以及風電的調峰特性,并分析了調峰約束下的風電接納能力的計算步驟；分析了基于非序貫蒙特卡羅模擬法計算電網調峰不足概率的一般步驟,并基于Matlab編寫了電網調峰不足概率的計算程序；介紹了運用風電場并網點的P-V曲線來計算靜態(tài)穩(wěn)定約束下風電接納能力的方法；給出了風電接納能力暫態(tài)校驗時故障的設置方法及需要滿足的暫態(tài)穩(wěn)定條件,并總結出暫態(tài)穩(wěn)定約束下風電接納能力的求解方法。 其次,介紹了目前常用的三種風機類型的穩(wěn)態(tài)潮流模型及并網的暫態(tài)穩(wěn)定性,并在VC++6.0中編寫了它們的潮流計算程序,通過PSASP中的UPI模塊接入了PSASP;介紹了常見的風電場動態(tài)無功補償類型；給出了母線短路容量的相關概念及其計算方法以及電網不同的運行方式對風電場的影響。 隨后,在PSASP仿真平臺中搭建了某地區(qū)電網模型,并將電網劃分為四個分區(qū),分別計算了這些分區(qū)在調峰約束、靜態(tài)穩(wěn)定約束、暫態(tài)穩(wěn)定約束下的風電接納能力；又通過分別計算不同風電機組類型、不同無功補償狀況、并網點不同短路容量、電網不同運行方式下某分區(qū)的風電接納能力,研究出了以上四個影響因素的影響程度大小和三個約束條件之間的關系,并最終給出了研究電網風電接納能力的一般思路。 最后,總結全文得到的研究成果,對課題有待完善及相關研究內容有待發(fā)掘的地方給予了展望。
[Abstract]:Compared with conventional energy, wind energy is a renewable, low-cost and environmentally-friendly new energy. At present, the grid capacity of wind power generation is constantly expanding, and the influence of large-scale wind power grid on the power grid has been paid more and more attention. The wind power acceptance capacity of power grid is one of the important factors that must be considered in the planning and construction of wind farm, and how to solve the wind power acceptance ability and find out the factors that affect the wind power acceptance capacity is very important to the study of wind power grid connection. This paper mainly studies the constraints and influencing factors of the wind power acceptance capacity of the power grid, and finally gives a general idea for the study of the wind power acceptance capacity. Firstly, the concept of peak-shaving in power system, the peak-shaving characteristics of conventional power supply and wind power are introduced, and the calculation steps of wind power capacity under peak-shaving constraints are analyzed. This paper analyzes the general steps of calculating the insufficient probability of peak-shaving based on the non-sequential Monte Carlo simulation method, and compiles a program based on Matlab to calculate the probability of the lack of peak-shaving. This paper introduces the method of calculating the wind power acceptance ability under static stability constraint by using the P-V curve of the wind farm node. In this paper, the fault setting method and transient stability conditions for transient check of wind power admission capacity are presented, and the solution method of wind power admission capacity under transient stability constraints is summarized. Secondly, the steady-state power flow model and transient stability of three fan types are introduced, and their power flow calculation programs are written in VC 6.0. PSASP; is connected to PSASP; through UPI module in PSASP. The common types of dynamic reactive power compensation in wind farms are introduced. The related concepts and calculation methods of busbar short-circuit capacity and the influence of different operation modes of power grid on wind farm are given. Then, a regional power network model is built in the PSASP simulation platform, and the power grid is divided into four districts. The wind power acceptance capacity of these districts under peak load regulation, static stability and transient stability constraints is calculated respectively. By calculating the different types of wind turbine units, different reactive power compensation conditions, and different short-circuit capacity of the network, the wind power acceptance capacity of a district under different operation modes of the power grid is calculated. The relationship between the degree of influence of the above four factors and the three constraints is studied. Finally, a general idea for the study of the wind power acceptance capacity of the power grid is given. Finally, the research results obtained in this paper are summarized, and the future of the subject and the relevant research contents are prospected.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM614

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