电力系统广域安全域边界特性分析及构建方法研究

发布时间：2018-04-15 02:30

本文选题：区域互联电网 + 安全域　；参考：《天津大学》2014年硕士论文

【摘要】：随着我国经济的快速发展,很多地区出现电力供需矛盾,为解决我国固有的能源资源与经济发展逆向分布问题,大量电力需要实现远距离输送;同时,由于一次能源的巨大消耗已对环境造成了巨大污染,各种清洁能源得到快速发展和推广,大规模的风电、太阳能发电相继入网,为充分利用清洁的风能、太阳能,大型新能源电站和超/特高电压线路不断建立,电网互联程度不断加强。为了保障电网安全稳定运行,研究互联电力系统的安全稳定问题具有十分重要的意义。本文基于安全域理论,针对电力大系统区域间互联断面的安全稳定约束,提出了一种适用的安全域方法,并给出了构建及求解该安全域实用方法。本文的主要工作如下:1、基于区域互联电网的特点,提出了一种适用的广域安全域构建思路。首先,通过分析区域间功率传输关系,提出利用区域间断面交换功率作为安全域坐标轴,以此来构建安全域,其实质是利用降维技术,由断面安全约束来间接反映整个电网的运行安全性;其次,根据限制互联断面交换功率的安全稳定问题,确定区域互联电网广域安全域的边界约束;最后,给出安全域极限点的搜索策略和安全域边界的拟合方法。2、将所提广域安全域思路与断面热稳定约束相结合,提出一种断面热稳定安全域并给出其快速求解算法。首先,对断面热稳定极限点进行解析,得到单一约束下的安全域超平面边界的法向量;其次,综合利用仿真方法,给出关键临界点(顶点)的搜索策略,在减少搜索量的基础上,保证不遗漏可能存在的约束条件;最后,提出断面热稳定安全域边界的快速计算综合实现方法。3、基于所提安全域方法,设计开发了关键断面多维空间热稳定安全域边界分析计算系统,实现了基础数据导入、关联基础数据解析、极限点搜索、安全域计算拟合以及安全域显示等功能。本文所提方法和所研发系统,已在我国南方某大电网实际系统中得到应用,其可行性和有效性得到很好验证。
[Abstract]:With the rapid development of our country's economy, there are contradictions between supply and demand of power in many areas. In order to solve the problem of reverse distribution of energy resources and economic development in our country, a great deal of electric power needs to be transported over long distances; at the same time,Because the huge consumption of primary energy has caused great pollution to the environment, all kinds of clean energy have been rapidly developed and popularized, large-scale wind power, solar power generation has been connected to the network, in order to make full use of clean wind energy, solar energy,Large new energy power stations and super / ultra-high voltage lines have been established and the interconnection of power grids has been strengthened.In order to ensure the safe and stable operation of power grid, it is of great significance to study the safety and stability of interconnected power system.Based on the theory of security domain, this paper presents a suitable security domain method for the security and stability constraints of inter-area interconnection in power system, and gives a practical method to construct and solve the security domain.The main work of this paper is as follows: 1. Based on the characteristics of regional interconnected power network, a suitable wide area security area construction idea is proposed.First of all, by analyzing the power transmission relationship between regions, it is proposed to use the interregional cross-section exchange power as the coordinate axis of the security domain to construct the security domain. The essence of which is to use the dimensionality reduction technology.The section security constraints indirectly reflect the operation security of the whole power network. Secondly, according to the security and stability problem of limiting the power exchange between the interconnected sections, the boundary constraints of the wide area security area of the regional interconnected power network are determined. Finally,The search strategy of the limit point in the security domain and the fitting method of the boundary in the security domain are given. By combining the proposed wide-area safe domain idea with the thermal stability constraint of the section, a fast solution algorithm for the safety region of the cross-section thermal stability is proposed.Firstly, the thermal stability limit point of the section is analyzed and the normal vector of the hyperplane boundary in the security domain under a single constraint is obtained. Secondly, the search strategy of the critical critical point (vertex) is given by synthetically using the simulation method.On the basis of reducing the search amount, the possible constraints are not omitted. Finally, a comprehensive method for fast calculation of the boundary of the thermal stability security domain is proposed, which is based on the proposed security domain method.The boundary analysis and calculation system for multi-dimensional thermal stability security domain of key sections is designed and developed. The functions of importing basic data, analyzing associated basic data, searching limit points, calculating and fitting security domain and displaying security domain are realized.The proposed method and the developed system have been applied to a large power grid system in the south of China, and its feasibility and effectiveness have been well verified.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM712

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