主动配电网源网荷协调运行机制研究

发布时间：2018-03-12 14:38

本文选题：分布式电源　切入点：源网荷互动　出处：《华中科技大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着能源短缺问题和污染问题的日益严重,以及用户的电力需求不断增加,传统电力系统已经显现出诸多不足之处。在这种形势下,各种分布式电源以其清洁高效、成本低廉、可再生等等优点,在整个电力系统中所占的比例逐步增加。其中,尤以风力发电和光伏发电为甚。然而,分布式发电一个最大的特点就是其随机性很强,难以预测,会影响电网的安全稳定。这就给分布式发电并网提出了新的要求,于是主动配电网源网荷协调运行应运而生。现有的电网互动研究主要表现在源网协调或者用户侧互动某一个局部方面,没有将源网荷协调运行在整体上更准确的把握,且不曾建立一个准确全面的指标体系来衡量整个系统的互动水平。在数学模型的建立和求解方面,以往的算法也考虑的不周全,仅仅考虑了能源损耗这一纯粹的机组组合问题,且未能体现协调运行。本文从源网荷协调运行的概念入手,分析了电网各侧的柔性特征和各种互动模式,剖析了源网荷协调运行的整体内涵,包括内部机理、实现手段及基本原则等等。在此基础上,提出了主动配电网源网荷多目标协调运行的指标体系,包括电源侧、电网侧、负荷侧指标以及互动水平指标等等,并进一步提出了优化的全局指标。接着研究了主动配电网源网荷协调运行的内部机理,建立了分布式电源、电网和柔性负荷的数学分析模型,改进了现有优化问题的目标函数,最后用粒子群算法求解具体算例,以得到整个问题的实现机制。
[Abstract]:With the increasingly serious problem of energy shortage and pollution, as well as the increasing power demand of users, the traditional power system has shown a lot of shortcomings. In this situation, all kinds of distributed power generation is clean, efficient and low cost. The advantages of renewable power are increasing in the whole power system, especially wind power generation and photovoltaic power generation. However, one of the most important characteristics of distributed generation is its randomness, which is difficult to predict. It will affect the security and stability of the power grid. As a result, the coordinated operation of source network in active distribution network emerges as the times require. The existing research on power grid interaction mainly shows in some local aspect of source network coordination or user-side interaction, and does not have a more accurate grasp of the coordinated operation of source network load on the whole. Moreover, an accurate and comprehensive index system has not been established to measure the interaction level of the whole system. This paper starts with the concept of coordinated operation of source network load, analyzes the flexibility characteristics of each side of power network and various interactive modes, and analyzes the overall connotation of coordinated operation of source network load, including the internal mechanism. On the basis of this, the index system of multi-objective coordinated operation of active distribution network source network is put forward, including power side, grid side, load side index and interactive level index, etc. Then the internal mechanism of active distribution network load coordination is studied, the mathematical analysis model of distributed generation, power network and flexible load is established, and the objective function of the existing optimization problem is improved. Finally, the particle swarm optimization algorithm is used to solve the concrete example to obtain the implementation mechanism of the whole problem.
【学位授予单位】：华中科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TM727

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