【作者】 张行；

【导师】 郭创新；

【作者基本信息】 浙江大学 ， 电气工程， 2016， 硕士

【摘要】 现代社会对电能供应的可靠性需求越来越高,一旦电力供应中断将造成难以估量的损失。极端外部自然灾害对电网的安全运行造成了严重的威胁,充分地了解我国电网当前的防灾减灾技术、方法与措施,归纳总结现有方法的问题与不足,利用大数据时代下的理论与技术来改善现状、设计开发新的防御功能,对于提高电网抵御自然灾害的能力意义重大,为此本文开展了以下研究：首先,探讨了我国电网的安全防御框架,详细地总结了电网防灾减灾的现状与问题。在归纳电网防灾大数据的基础上,提出了基于大数据的电网防灾调度系统设计方案,旨在解决电网防灾调度方面现存的突出问题。方案详细地设计了包括电网输供电能力评估在内的一系列重要功能,系统的数据流与逻辑决策、基于大数据平台的软件架构等内容,以达到提升电网防灾调度能力的目标。其次,提出了一种计及主变可载性约束的三阶段配电网供电能力评估方法。针对现有评估方法未能考虑主变可载能力的问题,建立了主变可载性约束模型,模型考虑变压器的绕组热点温度约束、故障率约束及经济损益约束,通过定级风险严重度等级对变压器增容系数进行风险约束校验。此外,针对现有评估方法难以适应复杂多变的实际场景的问题,提出不同工况下的评估原则。方法包含预评估、约束分析、校验评估三个阶段,以重复潮流法为基础进行循环评估得到最终结果。两个算例的仿真结果表明该方法可为不同场景下的配电网调度运行提供辅助决策建议。最后,在上述研究的基础上,对贵阳地区电网多维度风险调度与应急指挥系统的工程开发与实现进行详实的介绍,包括系统的总体流程、数据接口、各功能模块、开发与运行环境、硬件配置、后台模块的组织、人机界面效果等内容,旨在为贵阳地区电网运行人员提供多样化的防灾调度手段,提高电网的安全运行水平。更多还原

【Abstract】 The demand for power supply reliability is higher in modern society. There will be an immeasurable loss once power supply is interrupted. Extreme external natural disasters threaten to secure operation of power grid. Fully understanding current technology, methods and measures of disaster prevention and reduction in China’s power grid, and summarizing problems and deficiencies of existing method, and using the theory and technology of big data to improve current situation, develop new defensive functions are of great significance to improve capacity of power grid to withstand natural disasters. In this paper, the following studies are carried out.Firstly, the security defense framework of China’s power grid is discussed, current situation and problems are summarized in detail. On the base of inducing big data of power grid disaster prevention, the design scheme is put forward, which aims at solving the existing outstanding problems. A series of important functions are designed in detail, including power grid transmission and distribution capacity evaluation. And data flow and decision logic, and software architecture on the big data platform are designed meanwhile, which aims at improving power grid disaster prevention and dispatch ability.Secondly, a kind of three stage real-time evaluation method for power supply capability of power distribution network with the constraint of transformers’ load capacity is proposed. To solve the problem that existing methods for power supply capability evaluation of distribution network doesn’t consider transformers’ overload capacity, a transformers’ load model is proposed. The model considers winding hot-spot temperature constraint, failure rate constraint, economic constraint, and inspects the increased coefficient via rating risk severity level. Besides, existing methods can’t adapt to complex scenes, so this paper proposes different evaluation principles. The method includes three stages:pre-evaluation, constraint analysis and verification evaluation, and final results are obtained by repeated power flow method. The two simulation results show that the method can provide an assistant making basis for different scenes.Finally, on the basis of above research, development and implementation of Guiyang Power Grid Multi-dimensional Risk Dispatch and Emergency Command System are introduced in detail, including overall process, data interface, each function module, development and operation environment, the hardware configuration, background module organization, and man-machine interface, etc. The system is to provide a variety of disaster prevention and control measures for Guiyang regional power grid operators, and improve the secure operation level of power grid.更多还原