基于FACTS装置提高电力系统输送容量的方法研究

发布时间：2025-06-29 18:44

　　随着用电需求的日益增长,输电系统持续工作于接近极限状态以保证输电容量和负荷需求的平衡。但电力系统应当工作于其热力和电压限值以内,否则可能发生系统崩溃。因此,现有的输电系统不够可靠,需要采用新的系统运行方法。架设新的输电线路能够解决上述问题,但不够经济,亦存在环境问题。若输电系统能够得到更有效的控制,则可输送更多的电能以解决上述问题。此外,电网的不断扩大需要对其参数进行稳定、灵活和鲁棒的控制,以有效地为负荷供能并满足快速增长的负荷需求。电力系统须灵活可控才能有效应对发、输、配和用电各环节的突发状况。应用柔性交流输电系统(FACTS)装置的能够满足电力系统对灵活控制的需求。FACTS装置源于90年代,现已备受瞩目。这些基于微控制器的装置有利于提高输电线路的负载容量、提供无功补偿、改善电压波形与优化其他电气量。本文针对FACTS装置(静态串联同步补偿器(SSSC)和晶闸管控制串联补偿器(TCSC))提高输电线路输送容量(PTC)的有效性开展了研究。提出一种基于TCSC中点补偿技术的系统可靠性提升方法,可提高浪涌阻抗,保证整个系统的稳态电压质量。本文详细研究了串联FACTS装置——SSSC和TC...

【文章页数】：132 页

【学位级别】：博士

【文章目录】：
Abstract
摘要
Acronyms and Abbreviations
Chapter 1 Introduction
    1.1 General Overviews
    1.2 Reactive Power
        1.2.1 Shunt Compensation
        1.2.2 Series Compensation
    1.3 Overview of Flexible AC Transmission Systems (FACTS)
        1.3.1 Types of FACTS
            1.3.1.1 Voltage Source Converter Based FACTS Device
            1.3.1.2 Static Series Synchronous Compensator (SSSC)
            1.3.1.3 STATCOM
        1.3.2 Thyristor Based FACTS Devices
            1.3.2.1 Static VAR compensator(SVC)
            1.3.2.2 Thyristor Controlled Series Capacitor (TCSC)
            1.3.2.3 Advantages ofFACTS Controllers
    1.4 Problem Statement
    1.5 Literature Survey
    1.6 Outline of Research Thesis
Chapter 2 Investigation of Series FACTS devices SSSC and TCSC to Improve PowerTransfer Capability
    2.1 Introduction
    2.2 Power Enhancement using TCSC
        2.2.1 Thyristor Bypass Mode
        2.2.2 Thyristor Blocked Mode
        2.2.3 Vernier Mode
        2.2.4 Control Scheme of TCSC
        2.2.5 Circuit diagram for Power Transfer Capability Enhancement
        2.2.6 Circuit Description
        2.2.7 Operation without TCSC
        2.2.8 Operation with TCSC
    2.3 Power Enhancement using SSSC
        2.3.1 Circuit diagram
        2.3.2 Circuit Description
        2.3.3 Operation without SSSC
        2.3.4 Operation with SSSC
        2.3.5 Comparison between TCSC and SSSC
    2.4 Power System Reliability
        2.4.1 Midpoint Compensation Technique With TCSC To Improve Reliability
            2.4.1.1 Midpoint Compensation of two machines 3-bus system
            2.4.1.2 Midpoint voltage magnitude
    2.5 Simulation Model
        2.5.1 Operation
        2.5.2 Analysis results
    2.6 Conclusion
Chapter 3 Improvement in Power System Loadability using FACTS Controller
    3.1 Enhancement in Power System Loadability using FACTS
    3.2 Stability Enhancement with TCSC and SSSC
    3.3 Simulation Model
    3.4 Result and Discussion
    3.5 Choice of the FACTS Controllers
    3.6 Conclusion
Chapter 4 Optimal Fuzzy PID Controller
    4.1 Internal Control Structure
    4.2 Controlling Scheme
        4.2.1 Conventional PID Controllers
    4.3 Fuzzy PID Controller
    4.4 Optimal Fuzzy PID based on Genetic Algorithm (GA)
        4.4.1 Basic Procedure
        4.4.2 Choice of Parameters
    4.5 Modeling of TCSC
        4.5.1 Transmission Line under Study
    4.6 Summary
Chapter 5 Modeling of TCSC with dual TCRs in IEEE 9 bus 3-Machine System
    5.1 Introduction
    5.2 MATLAB Simulation Model
        5.1.1 Fuzzy PID Controller
        5.1.2 Fuzzy Techniques
    5.3 Defuzzification
    5.4 Genetic Algorithm
        5.4.1 Introduction
        5.4.2 Optimization of control gains base on GA
            5.4.2.1 Ghromosome Representation
            5.4.2.2 Genetic Operation
            5.4.2.3 Objective Function
        5.4.3 Advantages of Genetic Algorithm
    5.5 Results and Discussions
        5.5.1 TCSC with dual TCRs in a transmission line Results (For 75% compensation)
        5.5.2 Power transfer capability
            5.5.2.1 Remarks
        5.5.3 Reference impedance
            5.5.3.1 Remarks
            5.5.3.2 Error in a TCSC controller
            5.5.3.3 Remarks
        5.5.4 TCSC with dual TCRs in a transmission line Results (For 50% compensation)
            5.5.4.1 Power transfer capability
            5.5.4.2 Reference impedance
            5.5.4.3 Error in a TCSC controller
            5.5.4.4 Remarks
    5.6 Conclusion
Chapter 6 Power System Loadability Enhancement by SVC using Load Flow Analysis
    6.1 Introduction
    6.2 Power Transmission and Distribution
        6.2.1 Power System Network of Pakistan
        6.2.2 Grid station under consideration
    6.3 Load Flow Analysis using ETAP
    6.4 Problem Formulation
    6.5 Modeling the System
    6.6 Results and Discussion
        6.6.1 Reasons to choose SVC
    6.7 Conclusion
Chapter 7 Conclusion and Future Work
    7.1 Conclusion
    7.2 Future Work
References
Published Papers
Acknowledgements
About the author



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