【作者】 汪皓；

【导师】 张伯明；

【作者基本信息】 清华大学 ， 电气工程， 2007， 硕士

【摘要】 在电力系统不断扩展和复杂的形势下,人工规划方式不能满足从大量可能的电网扩展方案中选优的要求。因此,研究能自动形成和优选方案的输电规划优化方法,提高规划工作的自动化水平,已经受到人们的重视。随着电网规模不断扩大、电力改革逐渐深入,输电网规划面临越来越多的不确定性,考虑不确定因素的电网规划得到国内外学术界和工程界的广泛关注。潮流计算是规划设计、调度运行中的基本工具,本文将基础数学领域具有严格公理化基础的研究模糊现象的可信性理论引入潮流计算中,建立模糊潮流算法。该算法具有严格的数学基础,可以作为其他模糊潮流算法的标准测试工具。另外,该算法可以给出计算的期望值、方差等结果,可直接用于决策分析。电力系统规划软件通常基于离线数据。而目前EMS系统已达到实用化水平,因此可利用当前电网的实际信息计算规划方案,这种模式即可以降低维护成本和使用难度,也利用了实时数据提高了规划结果的可信度。本文在已有EMS平台上建立了输电网短期规划系统。它通过对当前电网分析,使用灵敏度法自动建立候选线路集,然后建立了非线性混和整数规划模型,设计了四种计算模式,使用遗传算法和线性规划方法进行求解并得到优化结果。IEC 61970标准系列的提出为解决EMS间的信息共享提供了基础,其中CIM/CIS、SVG表征了电力系统的模型信息和图形信息。本文实现了SVG文件与EMS文件的双向转换,结合CIM/XML电网模型的导入导出技术,使得输电网规划系统可以建立在同构或者异构的EMS平台上。考虑规划方案的网络发布,本文建立了基于WEB的规划电网发布与分析平台,用户通过浏览器即可了解规划电网的架构并进行模拟调度操作或分析计算。这样电力系统中各个处室,甚至外界的关注者,均有可能了解到所辖电网的发展趋势,并对规划方案提出建议。更多还原

【Abstract】 With the continuing expansion of power system, the manual planning can not find the optimal solution from lots of candidates. Therefore, people are considering the transmission expansion method which can automatically form solutions and calculate the best one as a result.Due to increasing uncertain factors with the deepening of the electric power system reform, the transmission expansion considering uncertainties is recently paid attention to at home and abroad. Power flow calculation is the basic tool of planning. This paper introduces the Credibility Theory which researches fuzzy phenomena to power flow and establishes fuzzy power flow arithmetic. It has strict math fundament so can be benchmark for others. Besides, it can give expectations and variances for analyzing and decision. The transmission expansion is always depending on off-line data.Recently, EMS has been widely used. Thus we can use online data to calculate expansion planning. This mode not only can lower the cost and the difficult of use, but also enhances the results’credibility. A transmission planning system based on EMS is proposed in the paper, which uses sensitivity analysis to form set of candidates, design four calculating types and use genetic algorithm and linear programming to get the optimal solutions.IEC 61970 standards is proposed for data exchange. This paper implements the dual convert between SVG and EMS graphic format. With the import of CIM/XML and SVG, the transmission planning system can base on different EMS data. Considering publicity of plan schemas, a graphic platform based on WEB is designed in this paper. Through browsers, users can see the future network and do simulative operations, then maybe give response to planners.更多还原