分布式发电并网的综合评价研究

发布时间：2019-05-21 22:41

【摘要】：在电力改革和电力绿色发展的新形势下,我国面临经济增长和资源约束的双重压力,发展低碳电力、寻求可持续能源发展的实现路径已成为世界上多数国家和地区的重要能源发展战略。我国“十二五”规划也强调了低碳发展理念,并提出了构建现代能源产业体系。分布式发电因其能提高供电灵活性、节省投资、降低能耗的优点越来越受到世界各国的青睐,它将是未来电力工业的发展方向。但是,随着分布式发电的不断发展,将会对电力系统产生显著的影响,如电力系统负荷预测、规划和运行将面临不确定性。因此,有必要评估分布式发电并网对电网企业运营影响,从而有效规避并网过程中存在的风险,促进分布式发电的有利影响最大程度地发挥。论文围绕分布式发电并网对电网运营影响,首先,分析了我国分布式发电并网现状,包括分布式发电概述、分布式发电并网现状以及相关政策分析。其次,定性地分析了分布式发电并网对电网企业经济性、安全性、可靠性的影响。然后,通过挖掘分布式发电并网对电网企业的影响因素,结合指标的构建原则,构建了涵盖经济性、安全性、可靠性的分布式发电并网综合评价指标体系。进而,进行指标约简,通过德尔菲法、变异系数法、灰色关联赋权法对指标进行赋权,并基于最大熵原理和最大离差平方和构建组合赋权优化模型,得到组合赋权下的三种分布式发电并网方案的优劣排序,并验证了组合赋权综合评价模型的合理性,通过算例分析验证了分布式电源在不同位置接入电网的效用不同,多种分布式发电同时并网优于一种分布式发电并网。最后,从技术、政策和管理三个维度提出了促进分布式发电并网的保障机制。以期本文研究能够为电网企业进一步消纳分布式发电提供理论参考。
[Abstract]:Under the new situation of electric power reform and green development of electric power, China is facing the dual pressure of economic growth and resource constraints to develop low-carbon power. Seeking the realization path of sustainable energy development has become an important energy development strategy in most countries and regions in the world. The 12th five-year Plan also emphasizes the concept of low-carbon development and puts forward the construction of modern energy industry system. Distributed generation is more and more popular all over the world because of its advantages of improving power supply flexibility, saving investment and reducing energy consumption. It will be the development direction of power industry in the future. However, with the continuous development of distributed generation, it will have a significant impact on the power system, such as power system load forecasting, planning and operation will face uncertainty. Therefore, it is necessary to evaluate the influence of distributed generation grid connection on the operation of power grid enterprises, so as to effectively avoid the risks existing in the process of grid connection and promote the beneficial influence of distributed generation to the greatest extent. This paper focuses on the influence of distributed generation grid connection on power grid operation. Firstly, the present situation of distributed generation grid connection in China is analyzed, including the overview of distributed generation, the current situation of distributed generation grid connection and the analysis of related policies. Secondly, the influence of distributed generation and grid connection on the economy, security and reliability of power grid enterprises is analyzed qualitatively. Then, by mining the influencing factors of distributed generation grid-connected to power grid enterprises, combined with the construction principle of index, a comprehensive evaluation index system of distributed power generation grid-connected covering economy, security and reliability is constructed. Furthermore, the index reduction is carried out, and the index is weighted by Delphi method, coefficient of variation method and grey relational weighting method, and the combined weight optimization model is constructed based on the principle of maximum entropy and the sum of square of maximum deviation. The advantages and disadvantages of the three distributed power generation grid-connected schemes under the combined weight are obtained, and the rationality of the comprehensive evaluation model of the combined weighting is verified. The utility of the distributed power supply connected to the power grid in different locations is verified by an example. Multiple distributed power generation is better than one distributed generation grid-connected at the same time. Finally, the guarantee mechanism to promote the grid connection of distributed power generation is put forward from the three dimensions of technology, policy and management. It is hoped that the research in this paper can provide theoretical reference for power grid enterprises to further absorb distributed power generation.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：F426.61

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