电网风电接纳能力约束条件及影响因素研究

发布时间：2018-11-03 11:52

【摘要】：相对传统的常规能源,风能是一种可再生的、成本低且环境友好的新能源。目前风力发电的并网容量在不断的扩大,大规模的风电并网后对电网所带来的影响也在不断的引起人们的关注。电网的风电接纳能力是规划和建设风电场时必须要考虑的重要因素之一,而如何求解风电接纳能力以及找出影响风电接纳能力的因素对风电并网的研究十分重要。本文主要研究了电网风电接纳能力的约束条件以及影响因素,并最终给出了研究风电接纳能力的一般思路。首先,介绍了电力系统调峰的相关概念、常规电源以及风电的调峰特性,并分析了调峰约束下的风电接纳能力的计算步骤；分析了基于非序贯蒙特卡罗模拟法计算电网调峰不足概率的一般步骤,并基于Matlab编写了电网调峰不足概率的计算程序；介绍了运用风电场并网点的P-V曲线来计算静态稳定约束下风电接纳能力的方法；给出了风电接纳能力暂态校验时故障的设置方法及需要满足的暂态稳定条件,并总结出暂态稳定约束下风电接纳能力的求解方法。其次,介绍了目前常用的三种风机类型的稳态潮流模型及并网的暂态稳定性,并在VC++6.0中编写了它们的潮流计算程序,通过PSASP中的UPI模块接入了PSASP;介绍了常见的风电场动态无功补偿类型；给出了母线短路容量的相关概念及其计算方法以及电网不同的运行方式对风电场的影响。随后,在PSASP仿真平台中搭建了某地区电网模型,并将电网划分为四个分区,分别计算了这些分区在调峰约束、静态稳定约束、暂态稳定约束下的风电接纳能力；又通过分别计算不同风电机组类型、不同无功补偿状况、并网点不同短路容量、电网不同运行方式下某分区的风电接纳能力,研究出了以上四个影响因素的影响程度大小和三个约束条件之间的关系,并最终给出了研究电网风电接纳能力的一般思路。最后,总结全文得到的研究成果,对课题有待完善及相关研究内容有待发掘的地方给予了展望。
[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.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM614

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