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基于虚拟同步发电机的构网型并网逆变器稳定性控制策略研究

Study on Stability Control Strategy of Grid Connected Inverters Based on Virtual Synchronous Generators

  • 摘要: 由于构网型并网逆变器参数具有敏感性,且易受电网环境变化的影响,因此稳定性裕度较低。为了解决上述问题,提出基于虚拟同步发电机的构网型并网逆变器稳定性控制策略。构建构网型并网逆变器模型,全面模拟逆变器的工作过程。引入虚拟同步发电机技术,使逆变器能够精确复制传统同步发电机的行为。制定稳定性控制策略,通过有功下垂控制和自适应虚拟阻抗控制,实现逆变器输出功率的合理分配,提高构网型并网逆变器的稳定性。实验结果表明,研究方法显著提高了系统的稳定性裕度,确保了并网逆变器在面对复杂电网环境和扰动时能保持卓越的稳定性能。

     

    Abstract: Due to the sensitivity of the parameters of grid connected inverters and their susceptibility to changes in the power grid environment, the stability margin is relatively low. To solve the above problems, a stability control method for grid connected inverters based on virtual synchronous generators is proposed. Build a grid connected inverter model to comprehensively simulate the working process of the inverter. Introducing virtual synchronous generator technology to enable inverters to accurately replicate the behavior of traditional synchronous generators. Develop stability control strategies, achieve reasonable allocation of inverter output power through active droop control and adaptive virtual impedance control, and improve the stability of grid connected inverters. The experimental results show that the research method can significantly improve the stability margin of the system, ensuring that the grid connected inverter maintains excellent stability performance in the face of complex grid environments and disturbances.

     

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