發(fā)布時(shí)間：2018-11-03 11:52

【摘要】：相對傳統(tǒng)的常規(guī)能源,風(fēng)能是一種可再生的、成本低且環(huán)境友好的新能源。目前風(fēng)力發(fā)電的并網(wǎng)容量在不斷的擴(kuò)大,大規(guī)模的風(fēng)電并網(wǎng)后對電網(wǎng)所帶來的影響也在不斷的引起人們的關(guān)注。電網(wǎng)的風(fēng)電接納能力是規(guī)劃和建設(shè)風(fēng)電場時(shí)必須要考慮的重要因素之一,而如何求解風(fēng)電接納能力以及找出影響風(fēng)電接納能力的因素對風(fēng)電并網(wǎng)的研究十分重要。本文主要研究了電網(wǎng)風(fēng)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(fēng)電接納能力的一般思路。 首先,介紹了電力系統(tǒng)調(diào)峰的相關(guān)概念、常規(guī)電源以及風(fēng)電的調(diào)峰特性,并分析了調(diào)峰約束下的風(fēng)電接納能力的計(jì)算步驟；分析了基于非序貫蒙特卡羅模擬法計(jì)算電網(wǎng)調(diào)峰不足概率的一般步驟,并基于Matlab編寫了電網(wǎng)調(diào)峰不足概率的計(jì)算程序；介紹了運(yùn)用風(fēng)電場并網(wǎng)點(diǎn)的P-V曲線來計(jì)算靜態(tài)穩(wěn)定約束下風(fēng)電接納能力的方法；給出了風(fēng)電接納能力暫態(tài)校驗(yàn)時(shí)故障的設(shè)置方法及需要滿足的暫態(tài)穩(wěn)定條件,并總結(jié)出暫態(tài)穩(wěn)定約束下風(fēng)電接納能力的求解方法。 其次,介紹了目前常用的三種風(fēng)機(jī)類型的穩(wěn)態(tài)潮流模型及并網(wǎng)的暫態(tài)穩(wěn)定性,并在VC++6.0中編寫了它們的潮流計(jì)算程序,通過PSASP中的UPI模塊接入了PSASP;介紹了常見的風(fēng)電場動(dòng)態(tài)無功補(bǔ)償類型；給出了母線短路容量的相關(guān)概念及其計(jì)算方法以及電網(wǎng)不同的運(yùn)行方式對風(fēng)電場的影響。 隨后,在PSASP仿真平臺(tái)中搭建了某地區(qū)電網(wǎng)模型,并將電網(wǎng)劃分為四個(gè)分區(qū),分別計(jì)算了這些分區(qū)在調(diào)峰約束、靜態(tài)穩(wěn)定約束、暫態(tài)穩(wěn)定約束下的風(fēng)電接納能力；又通過分別計(jì)算不同風(fēng)電機(jī)組類型、不同無功補(bǔ)償狀況、并網(wǎng)點(diǎn)不同短路容量、電網(wǎng)不同運(yùn)行方式下某分區(qū)的風(fēng)電接納能力,研究出了以上四個(gè)影響因素的影響程度大小和三個(gè)約束條件之間的關(guān)系,并最終給出了研究電網(wǎng)風(fēng)電接納能力的一般思路。 最后,總結(jié)全文得到的研究成果,對課題有待完善及相關(guān)研究內(nèi)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(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM614

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