基于大量光伏项目并网的临汾电网规划方案的研究

发布时间：2018-06-06 02:48

本文选题：规划 + 光伏发电　；参考：《华北电力大学(北京)》2016年硕士论文

【摘要】：由于政府的光伏激励政策及临汾市扶贫局的光伏扶贫政策,临汾市面临了大规模、小容量、对于县域而言高穿透率的光伏项目的接入,尤其是扶贫光伏项目均通过绿色通道接入,这些对于临汾市的电网提出了很高的要求,既要保证网架的输送容量,又要保证接入方案的可经济行,这些均需进行讨论研究,有针对性的提出光伏接入的指导意见及规划建议。本文通过对临汾市电网现状及光伏接入前景的分析,对临汾市内光伏电站的置信容量及消纳问题进行了研究。在光伏电站的置信容量方面,主要从穿透率水平、光伏电站的分布形式、风-光发电机组互补发电及电动汽车等新型储能负荷的发展这四个方面展开了讨论分析,展望这些方面将对光伏发电置信容量产生的影响。在消纳问题方面,则通过电源规划和电力电量平衡分析,对临汾市电网的光伏消纳情况作出了评估。针对大量的光伏集中式并网,本文通过对临汾电网的电气计算及网架分析,以实际案例的潮流变化及改造方案进行分析说明,提出中部地区以就地消纳为主,而东西两山地区则主要通过超高压或高压输电送入本省电网的负荷中心进行消纳的建议,这些就需要及时提出网架建设需求,提高省级或区域级超高压电网的输送容量。本文亦将对于现阶段最局限临汾市光伏发电接入的间隔问题,进行分析统计,提出建设及改造建议。针对规模化光伏分散式并网,400kW及以下光伏项目一般接入低压电网,而低压电网的智能化水平普遍偏低,如何科学的引导分布式光伏项目的并网,就需要对其并网的容量、并网方式及并网位置做出研究分析,确保光伏项目接入电网后不引发电能质量问题。本文选取了100kW光伏项目作为案例,通过ETAP进行建模计算,对分布式光伏接入系统可能产生的问题作出了分析及建议,以期对临汾市的分布式电源接入提出指导性意见。临汾市虽然光伏项目的报装呈翻番式增长,在规划方面及接入系统方案的评审方面却处于盲区状态,相信本论文对于临汾市电网规划及接入系统方案的评审而言,是具有重要的参考价值的。
[Abstract]:As a result of the photovoltaic incentive policy of the government and the photovoltaic poverty alleviation policy of the Bureau of Poverty Alleviation of Linfen City, Linfen City is faced with a large-scale, small capacity photovoltaic project with a high penetration rate for the county. In particular, all the pro-poor photovoltaic projects are connected through green channels. These put forward very high requirements for the Linfen power grid. It is necessary to ensure both the transport capacity of the grid frame and the economic operation of the access scheme. All these need to be discussed and studied. Put forward the guidance of PV access and planning suggestions. Based on the analysis of the current situation of Linfen power network and the prospect of photovoltaic access, this paper studies the confidence capacity and absorption of photovoltaic power stations in Linfen City. In the respect of the confidence capacity of photovoltaic power station, the paper mainly discusses and analyzes the level of penetration rate, the distribution form of photovoltaic power station, the complementary generation of wind and optoelectric generator and the development of new energy storage load, such as electric vehicle, etc. The impact of these aspects on the confidence capacity of photovoltaic power generation is prospected. In the aspect of absorption, the photovoltaic absorption of Linfen power network is evaluated by power planning and power balance analysis. In view of a large number of photovoltaic centralized grid-connected, this paper through the electrical calculation and grid analysis of Linfen power network, with the actual case of power flow change and transformation scheme analysis, put forward that the central region is mainly local absorption. But in the east and west mountain area, the suggestion that the transmission of EHV or HV is carried out into the load center of the provincial power network is mainly carried out, which needs to put forward the demand of the grid construction in time to increase the transmission capacity of the provincial or regional UHV power grid. In this paper, the most limited Linfen photovoltaic access interval is analyzed, and suggestions for construction and reconstruction are put forward. In view of the fact that the large-scale photovoltaic distributed grid-connected photovoltaic projects generally connect to the low-voltage grid, but the intelligence level of the low-voltage grid is generally low, how to guide the grid connection of the distributed photovoltaic project scientifically, it is necessary to connect the capacity of the grid to the low-voltage grid, so how to guide the grid connection of the distributed photovoltaic project scientifically? The grid-connected mode and location are analyzed to ensure that the PV project will not cause power quality problems after it is connected to the grid. In this paper, 100kW photovoltaic project is selected as a case, through ETAP modeling and calculation, the possible problems of distributed photovoltaic access system are analyzed and suggestions are made, in order to provide guidance for Linfen distributed power access. Although the photovoltaic project in Linfen has doubled in size, it is in a blind area in the aspects of planning and evaluation of access system schemes. It is believed that this paper is for the evaluation of Linfen power network planning and access system schemes. It has important reference value.
【学位授予单位】：华北电力大学(北京)
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM715

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