论文总字数：16105字

摘 要

随着当今科学水平的不断进步和发展，传统性资源例如煤炭等化石燃料已不能完全适用于当今绿色低碳的发展观念，其对环境的污染有目共睹。对于配电系统而言，微网具有得天独厚的优势，其对分布式电源的有效利用，受到各国的重视。微网加入配电系统后其具有的种种特点，有助于提高用户供电可靠性，及缓解能源危机与环境污染的压力，满足我国国情发展。微电网主要是由三部分构成，分别是电源、储能装置、负荷等，通过利用电子元件性能对其内部的装置采取逻辑控制，在保障用户满意度的前提下，实现对可再生能源的有效利用，使其平滑地并入电网运行。

本文基于序贯蒙特卡罗模拟法，采用改造后的RBTS Bus2系统对包含有微网的配电系统进行可靠性分析，研究配电系统在加入微网元素后的稳定性及质量如何。这个过程中既考虑了元器件的故障情况，同时也考虑了电池储能策略等诸多因素，建立了较为全面的微网数学模型。同时总结了多种可靠性指标，如负荷可靠性指标、可靠性灵敏度等。基于这些模型与可靠性指标，研究分布式电源容量和储能策略等对系统可靠性的影响。研究结果表明，提高电源容量和电池充放电功率能进一步改善含微网的配电系统可靠性，但上述影响因素增加到一定值后，系统可靠性趋于饱和，不再明显提高。

关键词：配电网；序贯蒙特卡罗法；元件故障率；可靠性灵敏度；分布式电源容量；电池储能策略

Reliability Analysis of Distribution System with Microgrid

Abstract

With the continuous progress and development of today"s scientific level, traditional resources such as coal and other fossil fuels can not fully apply to today"s concept of green low-carbon development, and its pollution to the environment is obvious to all. For distribution systems, micro-grid has unique advantages, and its effective use of distributed generation has attracted the attention of all countries. The characteristics of microgrid after it joins the distribution system help to improve the reliability of power supply for users, alleviate the pressure of energy crisis and environmental pollution, and meet the development of China"s national conditions. Microgrid is mainly composed of three parts: power supply, energy storage device, load and so on. By using the performance of electronic components to control its internal devices logically, under the premise of guaranteeing the satisfaction of users, the effective utilization of renewable energy can be realized, so that it can be smoothly integrated into the grid operation.

Based on the sequential Monte Carlo simulation method, the reliability of the distribution system with microgrid is analyzed by using the modified RBTS Bus2 system, and the stability and quality of the distribution system with microgrid elements are studied. In this process, not only the failure of components, but also the battery energy storage strategy and other factors are considered, and a more comprehensive mathematical model of microgrid is established. At the same time, it summarizes a variety of reliability indicators, such as load reliability indicators, reliability sensitivity and so on. Based on these models and reliability indicators, the effects of distributed generation capacity and energy storage strategy on system reliability are studied. The results show that increasing the power supply capacity and battery charging and discharging power can further improve the reliability of distribution system with micro-grid, but when the above factors increase to a certain value, the reliability of the system tends to saturate and no longer improves significantly.

Keywords: distribution network; sequential Monte Carlo method; component failure rate; reliability sensitivity; distributed power supply capacity; battery energy storage strategy

目录

摘 要 I

Abstract II

第一章 引言 1

1.1 现代配电系统的相关定义 1

1.1.1 主动配电网定义 1

1.1.2 微电网的定义 1

1.2 光伏发电的优势 1

1.2.1太阳本身 1

1.2.2地理优势 1

1.2.3其他优势 1

1.2.4光伏发电背景意义 1

1.3 含微网的配电网发展前景 2

1.4 课题难点 2

第二章 含微网的配电系统元件模型 3

2.1 光伏电板模型 3

2.1.1 输出功率模型 3

2.1.2 辐照度模型 4

2.2 光伏阵列可靠性模型 4

2.3 负荷模型 5

2.4 电池储能系统模型 6

2.5 考虑元件寿命的可靠性模型 6

第三章 含微网的配电系统可靠性分析方法 7

3.1 含微网的配电系统可靠性指标与灵敏度分析 7

3.1.1 含微网的配电系统可靠性指标 7

3.1.2 可靠性灵敏度分析 8

3.2 含微网的配电系统可靠性分析方法及问题 8

3.2.1 蒙特卡罗模拟法与解析法的比较 8

3.2.2 蒙特卡罗模拟法 8

3.3 序贯蒙特卡罗法抽样 9

3.4 算法步骤 9

3.4.1 光伏发电对配电系统可靠性得影响 9

3.4.2 储能策略对配电系统可靠性影响 10

第四章 算例分析 11

4.1. 光伏发电 11

4.2 PV接入指标分析 11

4.3 储能策略对配电系统可靠性的影响 13

第五章 总结 14

致谢 15

参考文献 16

第一章 引言

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