UPFC建模及潮流计算方法研究

论文总字数：25472字

摘 要

学号：16012514 姓名：顾代杰

指导教师：高山

柔性交流输电系统（flexible AC transmission system, FACTS）是近年来蓬勃发展的电力技术，在灵活控制电网潮流、增加系统稳定性等方面的优势为电力系统带来了新的技术选择。统一潮流控制器（unified power flow controller, UPFC）是现代控制最为灵活的FACTS装置，可以通过调节控制线路阻抗、母线电压和功角，同时快速调节控制输电线路的有功潮流和无功潮流，为解决电网中潮流控制方法缺乏、动态无功支持能力不足等问题，提供了新的可实行手段。

本文介绍了目前统一潮流控制器的研究现状，根据UPFC的基本结构，详细阐述了UPFC的工作原理和工作特性，包括其推导过程也其中。简单分析比较了UPFC综合模型、解耦模型、功率注入型模型。由于功率注入模型简单、直观且通用，只需增加附加注入功率的状态变量，易于编程实现，所以最后选定功率注入模型来进行含UPFC网络的稳态潮流计算在分析了现有的几种含UPFC潮流计算方法后，最后选择牛顿拉夫逊法来进行潮流计算，在算法中，考虑了线路的对地导纳，更具有一般性，只需修正少量的雅克比矩阵元素，而且由于雅克比矩阵的对角占有性质，在潮流计算的某些情况，可以对雅克比矩阵进行简化修正。采用此算法具有很好的收敛性，最后通过5节点系统验证程序准确性，再在9节点系统进行验证。表明UPFC相当于改变线路参数来实现潮流的重新分布，能很好地控制节点的电压与线路上有功无功潮流。

关键词：UPFC，建模，功率注入，潮流计算

Power Flow Modeling and Calculation with UPFC

Abstract

FACTS (flexible AC transmission system, FACTS) technology in recent years, the power is booming, the advantages in flexibility and control power flow and increase system stability and other aspects of power system brings new technology options. UPFC (unified power flow controller, UPFC) is the most modern and flexible control of FACTS devices can be controlled by adjusting the line impedance, power bus voltage and angle, while quickly adjust active power flow control transmission lines and reactive power flow, in order to solve grid power flow control method lacks dynamic reactive support issues such as lack of capacity, provide a new means can be implemented.

This paper describes the current status of research UPFC, according to the basic structure of UPFC, it elaborated working principle and characteristics of UPFC, including its derivation also of them. Simple comprehensive analysis and comparison of the UPFC model, decoupling model, power injection type model. Since the power injection model is simple, intuitive and versatile, simply adding additional power injection of state variables, easy to program, so the final selection for power injection model with UPFC network steady flow calculation in the analysis of several existing containing after UPFC power flow calculation method, the final choice to Newton Raphson power flow calculation in the algorithm, consider the line-to-ground admittance, more general, only a small number of amendments Jacobian matrix elements, and because the Jacobian matrix diagonal possession of properties, in some cases, flow calculation, the Jacobian matrix can be simplified amendment. Using this algorithm has good convergence, and finally by the accuracy of the verification procedures 5 Node System, then 9-bus system for verification. Show that UPFC is equivalent to changing the line parameters to achieve the redistribution of the trend can be a good control of active and reactive power flow on the line voltage node.

KEY WORDS: UPFC, model, power injection, power flow

目录

第一章绪论 1

1.1 引言 1

1.2国内外在该领域的研究现状 1

1.3本文的研究目的和主要研究内容 3

第二章 UPFC介绍分析 4

2.1 FACTS技术背景 4

2.1.1 FACTS装置分类 5

2.1.2 FACTS在电力系统中的作用 9

2.2统一潮控制器研究现状 10

2.3 UPFC基本工作原理与工作方式 12

2.3.1 UPFC系统结构 12

2.3.2 UPFC的基本原理 13

2.3.3 并联侧的工作方式 16

2.3.4 串联侧工作方式 18

2.4 UPFC常见的稳态潮流模型 20

2.4.1 综合模型 20

2.4.2 等效解耦模型 20

2.4.3功率注入模型 21

2.5本章小结 22

第三章 UPFC稳态潮流计算 23

3.1模型选择与算法选择分析 23

3.2 基于功率注入法的UPFC稳态潮流计算 23

3.3 算例分析 27

3.3.1 5节点验证程序正确性 27

3.3.2 9节点系统验证模型与算法 29

3.4本章小结 31

总结 32

致谢 33

参考文献 34

第一章绪论

1.1 引言

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