风电接入对电力系统恢复过程的影响分析

发布时间：2018-02-25 04:16

本文关键词： 黑启动系统恢复方案评估暂态稳定风电　出处：《华北电力大学》2014年硕士论文　论文类型：学位论文

【摘要】：随着互联电网和智能电网的发展兴起,电网的结构变得越来越复杂。近年来世界范围内的大停电事件屡屡发生,造成了巨大的经济损失和恶劣的社会影响。制定合理的电力系统恢复方案对缩短供电恢复时间,减小停电损失至关重要。本文针对电力系统恢复方案的制定进行了相关研究,主要内容包括以下几点：在PSCAD/EMTDC仿真平台上建立了黑启动恢复网架的元件模型体系,该体系中包括了发电、输电、配电、用电部分的电气元件,并用这些元件构建了电力系统恢复初期系统。在系统仿真模型的基础上通过预想单相短路故障来校验初期系统的暂态稳定性,以此判断黑启动方案是否科学有效,并将结果用作指导继电保护装置的设定和配置。算例分析介绍了各模型的使用方法,说明了模型的实用性。对于通过校验的多个预案需要进行筛选决定出最优方案作为主预案。基于此目的,本文将方案筛选的原则制定成指标体系用于方案评估,并提出了一种将熵权法和改进的层次分析法相结合的方案评估算法,解决了传统层次分析法常无法通过一致性检验的问题,也兼顾了主观经验和客观事实的双重因素,计算过程简单精确。算例分析表明了文中所提算法的实用性和准确性,并详细说明了算法的计算流程。随着新能源的不断兴起,新能源容量占电网比例越来越大,对电网的影响也在逐渐增加,尤其以风电发展最快,本文就风电接入对电力系统恢复过程的影响进行了分析和探讨,对风电接入电网的优劣性进行了论述,并讨论了在电力系统恢复过程中风电接入电网的最佳时机,最后设计了仿真方案对某实际电网的黑启动预案进行了仿真分析,说明了风电并网对电力系统恢复过程的影响。对新能源参与电网恢复方案的研究提供了一定的参考价值。
[Abstract]:With the development of interconnected power grid and smart grid, the structure of power grid becomes more and more complicated. It has caused huge economic loss and bad social impact. It is very important to make a reasonable recovery plan for power system to shorten the recovery time of power supply and reduce the loss of power supply. In this paper, the relevant research on the establishment of power system recovery scheme is carried out. The main elements include the following:. Based on the PSCAD/EMTDC simulation platform, the component model system of black start recovery grid is established. The system includes electrical components of generation, transmission, distribution and power consumption. Based on the simulation model of the power system, the transient stability of the initial system is verified by anticipating the single-phase short-circuit fault, and the black-start scheme is judged to be scientific and effective. The results are used to guide the setting and configuration of relay protection devices. The application methods of each model are analyzed and the practicability of the model is illustrated by an example. The optimal scheme should be selected to be the main plan through the screening of several verified plans. For this purpose, the principle of scheme selection is formulated as an index system for the evaluation of the scheme. A scheme evaluation algorithm combining entropy weight method and improved analytic hierarchy process (AHP) is proposed, which solves the problem that the traditional AHP can not pass the consistency test, and also takes into account the dual factors of subjective experience and objective facts. The calculation process is simple and accurate. The example analysis shows the practicability and accuracy of the proposed algorithm, and the calculation flow of the algorithm is explained in detail. With the rising of new energy sources, the proportion of new energy capacity in the power grid is increasing, and the influence on the power grid is gradually increasing, especially the fastest development of wind power. This paper analyzes and discusses the influence of wind power access on the restoration process of power system, discusses the advantages and disadvantages of wind power access to power system, and discusses the best time for wind power to connect to power network in the process of power system restoration. Finally, the simulation scheme is designed to simulate and analyze the black-start plan of a practical power network, which illustrates the influence of wind power grid connection on the restoration process of power system, and provides a certain reference value for the research of new energy sources participating in the research of grid restoration scheme.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM614

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