摘 要
随着可再生能源的快速发展，大规模风电并网对电力系统频率稳定性产生显著影响。本研究旨在探讨风电渗透率提升背景下电力系统频率响应的动态特性及其调控策略。通过建立包含双馈感应发电机和直驱永磁同步发电机的多机系统模型，采用时域仿真与频域分析相结合的方法，系统研究了不同风电渗透率、惯量水平及调频控制策略对系统频率稳定性的影响机制。研究发现，随着风电渗透率的增加，系统等效惯量显著降低，导致频率波动幅度增大且恢复时间延长；同时，不同类型风电机组的调频能力存在显著差异，其中直驱永磁同步发电机表现出更好的频率支撑特性。
关键词：风电并网 频率稳定性 调频策略
Abstract
With the rapid development of renewable energy, large-scale wind power grid connection has a significant impact on the frequency stability of the power system. The purpose of this study is to explore the dynamic characteristics of power system frequency response and its regulation strategies in the background of wind power permeability enhancement. By establishing a multi-machine system model including doubly-fed induction generator and direct-drive permanent magnet synchronous generator, and using the method of combining time domain simulation and frequency domain analysis, the influence mechanism of different wind power permeability, inertia level and frequency modulation control strategies on system frequency stability is studied. It is found that with the increase of wind power permeability, the system equivalent inertia decreases significantly, resulting in the increase of frequency fluctuation range and longer recovery time; At the same time, the frequency modulation capacity of different types of wind turbines is significantly different, among which the direct-drive permanent magnet synchronous generator shows better frequency support characteristics.
Keyword: Wind power grid connection frequency stability FM strategy
目 录
1绪论 1
1.1研究背景与意义 1
1.2研究现状 1
1.3研究方法与技术路线 2
2风电并网对电力系统频率特性的影响机理 2
2.1风电出力波动特性分析 2
2.2风电并网对系统惯量的影响 3
2.3风电并网对频率调节能力的影响 3
3大规模风电并网下电力系统频率稳定性评估方法 4
3.1频率稳定性评价指标体系构建 4
3.2基于概率统计的频率稳定性分析方法 4
3.3考虑时空分布的风电出力建模方法 5
4提升含大规模风电电力系统频率稳定性的控制策略 5
4.1风电机组参与调频的控制策略优化 5
4.2储能系统协同调频控制方法研究 6
4.3多源协调的频率稳定控制方案设计 7
5结论 7
参考文献 9
致谢 10
随着可再生能源的快速发展，大规模风电并网对电力系统频率稳定性产生显著影响。本研究旨在探讨风电渗透率提升背景下电力系统频率响应的动态特性及其调控策略。通过建立包含双馈感应发电机和直驱永磁同步发电机的多机系统模型，采用时域仿真与频域分析相结合的方法，系统研究了不同风电渗透率、惯量水平及调频控制策略对系统频率稳定性的影响机制。研究发现，随着风电渗透率的增加，系统等效惯量显著降低，导致频率波动幅度增大且恢复时间延长；同时，不同类型风电机组的调频能力存在显著差异，其中直驱永磁同步发电机表现出更好的频率支撑特性。
关键词：风电并网 频率稳定性 调频策略
Abstract
With the rapid development of renewable energy, large-scale wind power grid connection has a significant impact on the frequency stability of the power system. The purpose of this study is to explore the dynamic characteristics of power system frequency response and its regulation strategies in the background of wind power permeability enhancement. By establishing a multi-machine system model including doubly-fed induction generator and direct-drive permanent magnet synchronous generator, and using the method of combining time domain simulation and frequency domain analysis, the influence mechanism of different wind power permeability, inertia level and frequency modulation control strategies on system frequency stability is studied. It is found that with the increase of wind power permeability, the system equivalent inertia decreases significantly, resulting in the increase of frequency fluctuation range and longer recovery time; At the same time, the frequency modulation capacity of different types of wind turbines is significantly different, among which the direct-drive permanent magnet synchronous generator shows better frequency support characteristics.
Keyword: Wind power grid connection frequency stability FM strategy
目 录
1绪论 1
1.1研究背景与意义 1
1.2研究现状 1
1.3研究方法与技术路线 2
2风电并网对电力系统频率特性的影响机理 2
2.1风电出力波动特性分析 2
2.2风电并网对系统惯量的影响 3
2.3风电并网对频率调节能力的影响 3
3大规模风电并网下电力系统频率稳定性评估方法 4
3.1频率稳定性评价指标体系构建 4
3.2基于概率统计的频率稳定性分析方法 4
3.3考虑时空分布的风电出力建模方法 5
4提升含大规模风电电力系统频率稳定性的控制策略 5
4.1风电机组参与调频的控制策略优化 5
4.2储能系统协同调频控制方法研究 6
4.3多源协调的频率稳定控制方案设计 7
5结论 7
参考文献 9
致谢 10
