摘 要
随着全球能源结构转型的深入推进，可再生能源在电力系统中的占比持续攀升，其波动性和间歇性特征对电网稳定性提出了新的挑战。本研究旨在系统分析大规模可再生能源并网对电网稳定性的影响机制，并提出相应的优化策略。研究采用多时间尺度仿真方法，结合动态潮流计算和暂态稳定性分析，构建了包含风电、光伏等多种可再生能源的电力系统模型。通过对比不同渗透率下的系统运行特性，揭示了可再生能源并网对频率调节、电压控制和功角稳定的具体影响规律。研究发现，当可再生能源渗透率达到35%时，系统频率偏差较传统电网增加约40%，电压波动幅度扩大25%。针对这些问题，本文创新性地提出了基于虚拟同步机技术的自适应控制策略和考虑源-荷互动的协同调度方法，有效提升了系统的抗扰动能力和动态响应特性。
关键词：可再生能源并网 电网稳定性 虚拟同步机技术
Abstract
With the deepening of the global energy structure transformation, the proportion of renewable energy in the power system continues to rise, and its volatility and intermittent characteristics pose new challenges to the stability of the power grid. The purpose of this study is to systematically analyze the influence mechanism of large-scale renewable energy grid connection on grid stability and propose corresponding optimization strategies. Using multi-time scale simulation method, combined with dynamic power flow calculation and transient stability analysis, a power system model including wind power and photovoltaic power is constructed. By comparing the operation characteristics of the system under different permeability, the specific influence law of renewable energy grid connection on frequency regulation, voltage control and work Angle stability is revealed. The study found that when the renewable energy permeability reaches 35%, the system frequency deviation increases by about 40% compared with the traditional power grid, and the voltage fluctuation range increases by 25%. In view of these problems, this paper innovatively proposes an adaptive control strategy based on virtual synchronization machine technology and a collaborative scheduling method considering the source-charge interaction, which effectively improves the perturbation ability and dynamic response characteristics of the system.
Keyword: Renewable energy is connected to the grid Power grid stability Virtual synchronizer technology
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本文研究方法与技术路线 2
2可再生能源并网特性分析 2
2.1风能发电并网特性 2
2.2光伏发电并网特性 3
2.3分布式能源接入影响 3
3电网稳定性评估方法 4
3.1电压稳定性分析模型 4
3.2频率稳定性评估指标 5
3.3系统惯量响应特性 5
4可再生能源并网对电网稳定性的影响机制 6
4.1电压波动与闪变机理 6
4.2频率调节能力变化 6
4.3系统保护协调问题 7
5结论 7
参考文献 9
致谢 10
随着全球能源结构转型的深入推进，可再生能源在电力系统中的占比持续攀升，其波动性和间歇性特征对电网稳定性提出了新的挑战。本研究旨在系统分析大规模可再生能源并网对电网稳定性的影响机制，并提出相应的优化策略。研究采用多时间尺度仿真方法，结合动态潮流计算和暂态稳定性分析，构建了包含风电、光伏等多种可再生能源的电力系统模型。通过对比不同渗透率下的系统运行特性，揭示了可再生能源并网对频率调节、电压控制和功角稳定的具体影响规律。研究发现，当可再生能源渗透率达到35%时，系统频率偏差较传统电网增加约40%，电压波动幅度扩大25%。针对这些问题，本文创新性地提出了基于虚拟同步机技术的自适应控制策略和考虑源-荷互动的协同调度方法，有效提升了系统的抗扰动能力和动态响应特性。
关键词：可再生能源并网 电网稳定性 虚拟同步机技术
Abstract
With the deepening of the global energy structure transformation, the proportion of renewable energy in the power system continues to rise, and its volatility and intermittent characteristics pose new challenges to the stability of the power grid. The purpose of this study is to systematically analyze the influence mechanism of large-scale renewable energy grid connection on grid stability and propose corresponding optimization strategies. Using multi-time scale simulation method, combined with dynamic power flow calculation and transient stability analysis, a power system model including wind power and photovoltaic power is constructed. By comparing the operation characteristics of the system under different permeability, the specific influence law of renewable energy grid connection on frequency regulation, voltage control and work Angle stability is revealed. The study found that when the renewable energy permeability reaches 35%, the system frequency deviation increases by about 40% compared with the traditional power grid, and the voltage fluctuation range increases by 25%. In view of these problems, this paper innovatively proposes an adaptive control strategy based on virtual synchronization machine technology and a collaborative scheduling method considering the source-charge interaction, which effectively improves the perturbation ability and dynamic response characteristics of the system.
Keyword: Renewable energy is connected to the grid Power grid stability Virtual synchronizer technology
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本文研究方法与技术路线 2
2可再生能源并网特性分析 2
2.1风能发电并网特性 2
2.2光伏发电并网特性 3
2.3分布式能源接入影响 3
3电网稳定性评估方法 4
3.1电压稳定性分析模型 4
3.2频率稳定性评估指标 5
3.3系统惯量响应特性 5
4可再生能源并网对电网稳定性的影响机制 6
4.1电压波动与闪变机理 6
4.2频率调节能力变化 6
4.3系统保护协调问题 7
5结论 7
参考文献 9
致谢 10
