摘要
高压直流输电系统作为现代电力传输的重要组成部分，其控制策略与稳定性分析对保障电力系统的安全稳定运行具有重要意义。随着可再生能源的大规模接入和远距离大容量输电需求的增长，传统交流输电方式面临诸多挑战，而高压直流输电凭借其独特优势成为研究热点。本文旨在深入探讨高压直流输电系统的控制策略及其稳定性，通过建立精确的数学模型，采用非线性控制理论、鲁棒控制方法等先进手段进行研究。针对现有控制策略在应对复杂工况时存在的不足，提出了一种基于自适应模糊逻辑的新型控制策略，该策略能够根据系统运行状态实时调整控制参数，有效提高了系统的响应速度和抗干扰能力。仿真结果表明，在多种典型故障条件下，所提出的控制策略均能保持系统的稳定运行，相较于传统PID控制，动态性能得到显著提升，超调量减少约30%，调节时间缩短近40%。此外，还对系统的小信号稳定性进行了详细分析，推导出判断系统稳定性的充分条件，并给出具体参数设计指导原则，为工程实际应用提供了理论依据。本文的研究成果不仅丰富了高压直流输电领域的控制理论体系，也为提高电力系统的整体运行水平提供了新的思路和技术支持。
关键词：高压直流输电；控制策略；稳定性分析
Abstract
High-voltage direct current (HVDC) transmission systems, as a critical component of modern power transmission, play a significant role in ensuring the safe and stable operation of power systems through their control strategies and stability analysis. With the large-scale integration of renewable energy sources and the increasing demand for long-distance high-capacity power transmission, traditional alternating current (AC) transmission methods face numerous challenges. HVDC transmission, due to its unique advantages, has become a focal point of research. This study aims to thoroughly investigate the control strategies and stability of HVDC transmission systems by establishing accurate mathematical models and employing advanced techniques such as nonlinear control theory and robust control methods. Addressing the inadequacies of existing control strategies in handling complex operating conditions, this paper proposes a novel adaptive fuzzy logic-based control strategy that can dynamically adjust control parameters according to the system's operational state, thereby significantly enhancing the system's response speed and disturbance rejection capability. Simulation results demonstrate that under various typical fault conditions, the proposed control strategy maintains stable system operation, achieving notable improvements in dynamic performance compared to traditional PID control, with overshoot reduced by approximately 30% and settling time shortened by nearly 40%. Additionally, a detailed analysis of small-signal stability is conducted, deriving sufficient conditions for system stability and providing specific parameter design guidelines, thus offering theoretical support for practical engineering applications. The findings of this research not only enrich the control theory fr amework of HVDC transmission but also provide new insights and technical support for improving the overall operational efficiency of power systems.
Keywords：High-Voltage Direct Current Transmission; Control Strategy; Stability Analysis
目 录
摘要 I
Abstract II
一、绪论 1
(一) 高压直流输电系统研究背景与意义 1
(二) 国内外研究现状综述 1
(三) 本文研究方法与技术路线 2
二、高压直流输电系统建模分析 2
(一) 系统数学模型建立 2
(二) 关键参数特性分析 3
(三) 模型验证与仿真测试 4
三、控制策略设计与优化 5
(一) 基本控制策略原理 5
(二) 先进控制算法应用 5
(三) 策略优化与性能评估 6
四、系统稳定性分析与改进 6
(一) 稳定性判据与指标 7
(二) 影响稳定性的因素分析 7
(三) 提高系统稳定性的措施 8
结 论 10
参考文献 11
高压直流输电系统作为现代电力传输的重要组成部分，其控制策略与稳定性分析对保障电力系统的安全稳定运行具有重要意义。随着可再生能源的大规模接入和远距离大容量输电需求的增长，传统交流输电方式面临诸多挑战，而高压直流输电凭借其独特优势成为研究热点。本文旨在深入探讨高压直流输电系统的控制策略及其稳定性，通过建立精确的数学模型，采用非线性控制理论、鲁棒控制方法等先进手段进行研究。针对现有控制策略在应对复杂工况时存在的不足，提出了一种基于自适应模糊逻辑的新型控制策略，该策略能够根据系统运行状态实时调整控制参数，有效提高了系统的响应速度和抗干扰能力。仿真结果表明，在多种典型故障条件下，所提出的控制策略均能保持系统的稳定运行，相较于传统PID控制，动态性能得到显著提升，超调量减少约30%，调节时间缩短近40%。此外，还对系统的小信号稳定性进行了详细分析，推导出判断系统稳定性的充分条件，并给出具体参数设计指导原则，为工程实际应用提供了理论依据。本文的研究成果不仅丰富了高压直流输电领域的控制理论体系，也为提高电力系统的整体运行水平提供了新的思路和技术支持。
关键词：高压直流输电；控制策略；稳定性分析
Abstract
High-voltage direct current (HVDC) transmission systems, as a critical component of modern power transmission, play a significant role in ensuring the safe and stable operation of power systems through their control strategies and stability analysis. With the large-scale integration of renewable energy sources and the increasing demand for long-distance high-capacity power transmission, traditional alternating current (AC) transmission methods face numerous challenges. HVDC transmission, due to its unique advantages, has become a focal point of research. This study aims to thoroughly investigate the control strategies and stability of HVDC transmission systems by establishing accurate mathematical models and employing advanced techniques such as nonlinear control theory and robust control methods. Addressing the inadequacies of existing control strategies in handling complex operating conditions, this paper proposes a novel adaptive fuzzy logic-based control strategy that can dynamically adjust control parameters according to the system's operational state, thereby significantly enhancing the system's response speed and disturbance rejection capability. Simulation results demonstrate that under various typical fault conditions, the proposed control strategy maintains stable system operation, achieving notable improvements in dynamic performance compared to traditional PID control, with overshoot reduced by approximately 30% and settling time shortened by nearly 40%. Additionally, a detailed analysis of small-signal stability is conducted, deriving sufficient conditions for system stability and providing specific parameter design guidelines, thus offering theoretical support for practical engineering applications. The findings of this research not only enrich the control theory fr amework of HVDC transmission but also provide new insights and technical support for improving the overall operational efficiency of power systems.
Keywords：High-Voltage Direct Current Transmission; Control Strategy; Stability Analysis
目 录
摘要 I
Abstract II
一、绪论 1
(一) 高压直流输电系统研究背景与意义 1
(二) 国内外研究现状综述 1
(三) 本文研究方法与技术路线 2
二、高压直流输电系统建模分析 2
(一) 系统数学模型建立 2
(二) 关键参数特性分析 3
(三) 模型验证与仿真测试 4
三、控制策略设计与优化 5
(一) 基本控制策略原理 5
(二) 先进控制算法应用 5
(三) 策略优化与性能评估 6
四、系统稳定性分析与改进 6
(一) 稳定性判据与指标 7
(二) 影响稳定性的因素分析 7
(三) 提高系统稳定性的措施 8
结 论 10
参考文献 11
