复杂船舶电力系统的脆性建模仿真研究.pdf
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1、 江江 苏苏 科科 技技 大大 学学 硕硕 士士 学学 位位 论论 文文 论 文 题 目 复杂船舶电力系统的脆性 建模仿真研究 研 究 方 向 复杂系统分析与建模 学科、专业 控制理论与控制工程 研究生姓名 陈瑞平 导 师 姓 名 朱志宇教授 填表时间 2012 年 3 月 22 日 摘 要 I 摘 要 随着船舶贸易的不断增加和普遍,船舶电力系统的安全性与可靠性要求也越来越高。系统规模不断扩大,容量也不断上升,船舶电力系统结构的复杂度也越来越高。由于船舶电力系统工作环境比较恶劣,且系统自身也存在一些缺陷,这些来自于外部或内部的不确定性的干扰,都可能使得某个子系统突然崩溃,由于连锁崩溃效应,最终
2、可能会使整个系统坍塌,船舶电力系统所具有的这种特性称为脆性。脆性是从一个全新的角度来认识和研究复杂船舶电力系统可靠性、安全性,作为复杂系统的一个基本特性被提出,目前研究还处于起步阶段,本文以复杂船舶电力系统为研究对象,主要针对系统脆性建模进行研究和分析。首先,本文给出船舶电力系统脆性的定义、特点以及数学描述,研究出船舶电力系统脆性被激发的条件,给出复杂船舶电力系统的脆性传递模型。其次,基于交流潮流理论,建立复杂船舶电力系统脆性的 Agent 图模型。当某一子系统因故障崩溃后,系统潮流会重新分配,利用交流潮流算法调整系统潮流,使系统尽量维持在稳定范围内,进一步说明复杂船舶电力系统脆性演化的过程。
3、然后,在脆性模型的基础上,以图的边描述子系统之间的脆性联系,边的权值描述子系统之间的脆性联系程度,应用粒子群优化算法和蚁群算法求解系统在脆性发生时最有可能崩溃的路径,即最大崩溃路径。通过对脆性最大崩溃路径的预防和控制可有效地防止整个系统的崩溃。最后,基于混沌思想,研究和分析船舶电力系统脆性与混沌之间的内部联系。并结合实际的混合馈线式船舶电力系统,建立基于混沌理论的脆性模型。系统在混沌产生条件的刺激下,船舶电力系统的脆性被激发,求出此时的K熵值,检测系统的无序程度,并研究系统 Lyapunov 指数的变化情况,分析系统在脆性激发后是否处于混沌状态。进一步论证脆性是系统从有序稳定状态到混沌状态的过
4、程。这些方法的结合,有助于更准确更全面的认识和分析复杂船舶电力系统的脆性,并且可有效的预防和控制脆性发生,提高船舶电力系统的可靠性以及安全性。关键词:船舶电力系统;脆性;优化算法;交流潮流;混沌理论;II Abstract III Abstract With the increase and common of ship trade,security and reliability requirement of ship electrical power system become more and more high,the scale and capacity of system are
5、more and more big,complicated degree of system structure is more and more high.Environment of ship electrical power system is severe and it has intrinsic defects.So interference that exterior or inner can make ship electrical power system collapse.These interferences are likely to make a subsystem c
6、ollapse suddenly,and it may cause chain effects collapse,ultimately the whole of ship electrical power system will collapse.So brittleness is to describe the function of complex power electric system.From a new point of view,the security and reliability of ship electrical power system are researched
7、.As a basic characteristic is introduced,the research on brittleness is still on the start stage.The research object of this paper is ship electrical power system.This main task is to establish brittleness model of the system.Firstly,this paper introduces the definition,characteristic and the mathem
8、atical description of brittleness of the ship electrical power system.It was pointed out that stimulation conditions of brittleness of ship electrical power system,it gives complex power system to ship brittle transfer model.Secondly,based on the brittleness model of systems,the edges describe the b
9、rittleness link between two subsystems,and the weight of edges are described the degree of brittleness link between two subsystems.The particle swarm optimization algorithm and ant colony algorithm are used to seek out the path that most likely to collapse,that is the biggest collapse path.Through p
10、revent and control the biggest collapse of brittleness can effectively prevent occurrence of brittleness and the collapse of the whole system.Further shows the evolution of the brittle process of ship electric power system.Thirdly,based on theory of AC current and agent digraph,brittleness model of
11、ship electrical power system is established.When a subsystem collapses,the current of system will be redistributed.According to the balance conditions of ship electrical power system,AC current is used to adjust to current of the whole system,and makes the system to maintain stable range as possible
12、 as.Lastly,based on chaos theory,analysis the relation between chaos and brittleness.Brittleness model is provided of ship electrical power system of mixed feeder type.The system is disturbed by the interference of chaotic conditions,and brittleness is inspired.江苏科技大学工学硕士学位论文 IV Solving the kolmogor
13、ov entropy,tests the disorder degree of system.Research on Lyapunov index,analysis the system whether in a mess after brittleness was stimulated.Further expounds the close relation between chaos and brittleness.The combination of these methods is good to understand and analyse the brittleness of shi
14、p electrical power system.It can effectively prevent and control the brittleness happen,improving the system reliability and security.Keywords:ship electrical power system;brittleness;optimization algorithm;theory of AC current;chaos theory 目录 V 目目 录录 摘 要.I Abstract.III 第 1 章 绪论.1 1.1 船舶电力系统脆性的研究背景.
15、1 1.2 船舶电力系统脆性研究的目的和意义.2 1.3 国内外的发展和研究现状.3 1.4 研究内容.5 第 2 章 复杂船舶电力系统的脆性理论.7 2.1 引言.7 2.2 船舶电力系统脆性的定义.7 2.3 船舶电力系统脆性的特殊性.8 2.4 船舶电力系统脆性的客观存在.9 2.5 船舶电力系统脆性的传递模型.10 2.5.1 多米诺骨牌模型.10 2.5.2 金字塔模型.10 2.5.3 倒金字塔模型.11 2.6 船舶电力系统的脆性熵.12 2.7 本章小结.13 第 3 章 基于交流潮流的船舶电力系统脆性的 Agent 图模型.15 3.1 引言.15 3.2 Agent 图理论
16、.15 3.2.1 赋权图.15 3.2.2 Agent 图.15 3.2.3 Agent 图演化规则.16 3.3 潮流理论.18 3.3.1 交流潮流理论.18 3.3.2 直流潮流理论.19 3.4 基于交流潮流的船舶电力系统脆性的 Agent 图模型.20 3.4.1 基于交流潮流建立船舶电力系统脆性的 Agent 图模型.20 3.4.2 交流潮流算法的修正方程.21 3.4.3 船舶电力系统脆性的建模流程.23 3.5 船舶电力系统脆性的建模仿真结果.25 3.6 本章小结.30 第 4 章 船舶电力系统脆性的最大崩溃路径.31 4.1 引言.31 4.2 船舶电力系统脆性的最大崩
17、溃路径.31 4.2.1 崩溃路径.31 江苏科技大学工学硕士学位论文 VI 4.2.2 最大崩溃路径.32 4.3 优化算法.32 4.3.1 粒子群优化算法.32 4.3.2 蚁群算法.34 4.4 船舶电力系统脆性的最大崩溃路径的仿真研究.36 4.4.1 粒子群优化算法求解最大崩溃路径.37 4.4.2 蚁群算法求解最大崩溃路径.38 4.5 本章小结.40 第 5 章 基于混沌理论研究复杂船舶电力系统的脆性.42 5.1 引言.42 5.2 混沌理论.42 5.2.1 混沌定理.42 5.2.2 混沌模型.43 5.2.3 脆性与混沌之间的关系.45 5.3 基于混沌理论的船舶电力系
18、统脆性模型.47 5.4 基于混沌理论的船舶电力系统脆性模型仿真与分析.51 5.5 本章小结.47 结论与展望.55 参考文献.57 攻读学位期间发表的学术论文目录.61 致 谢.62 Contents VII Contents Abstract(Chinese).I Abstract(English).III Chapter 1 Introduction.1 1.1 Background of Brittleness Theory Research of Ship Electrical Power System.1 1.2 Purpose and Meaning of Brittlenes
19、s Theory Research of Ship Electrical Power System.2 1.3 Development and Research Status of Domestic and Foreign Relevant Fields.3 1.4 Conclusion.5 Chapter 2 Brittleness and Its Theoretical Basis Of Ship Electrical Power System.7 2.1 Foreword.7 2.2 Definition of Brittleness of Ship Electrical Power S
20、ystem.7 2.3 Particularity of Brittleness of Ship Electrical Power System.8 2.4 Objective Existence of Brittleness of Ship Electrical Power System.9 2.5 Transfer Model of Brittleness of Ship Electrical Power System.10 2.5.1 Domino Model.10 2.5.2 Pyramid Model.10 2.5.3 Pour Pyramid Model.11 2.6 Entrop
21、y of Brittleness of Ship Electrical Power System.12 2.7 Chapter Summary.13 Chapter 3 Agent Model of Brittleness of Ship Electrical Power System Based on AC Current.15 3.1 Foreword.15 3.2 Agent Digraph Theory.15 3.2.1 Weighted Graph Model.15 3.2.2 Agent Graph.15 3.2.3 Evolution Rules of Agent Graph.1
22、6 3.3 Theory of Current.18 3.3.1 Theory of AC Current.18 3.3.2 Theory of DC Current.19 3.4 Agent Model of Brittleness of Ship Electrical Power System Based on AC Current.20 3.4.1 Agent Model of Brittleness of Ship Electrical Power System Based on AC Current.20 3.4.2 Fixed Equation of AC Current.21 3
23、.4.3 Flow Chart of Model of Agent Graph of Ship Electrical Power System.23 3.5 Simulation of Model of Agent Graph of Ship Electrical Power System.25 3.6 Chapter Summary.30 Chapter 4 Research on the Biggest Collapse Path of Brittleness of Ship Electrical Power System.31 4.1 Foreword.31 4.2 The Bigges
24、t Collapse Path of Brittleness of Ship Electrical Power System.31 4.2.1 Collapse Path.31 4.2.2 The Biggest Collapse Path.32 4.3 Optimization Algorithm.32 江苏科技大学工学硕士学位论文 VIII 4.3.1 Particle Swarm Optimization Algorithm.32 4.3.2 Ant Colony Algorithm.34 4.4 Simulation of the Biggest Collapse Path of Br
25、ittleness of Ship Electrical Power System.36 4.4.1 Particle Swarm Optimization Algorithm is to Solve the Biggest Collapse Path.37 4.4.2 Ant Colony Algorithm is to Solve the Biggest Collapse Path.38 4.5 Chapter Summary.40 Chapter 5 Research on Brittleness of Ship Electrical Power System based on Chao
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