基于微分自适应的虚拟惯量和阻尼控制方法

Virtual Inertia and Damping Control Methods Based on Differential Adaptive

摘要:

针对传统虚拟惯量控制动态响应慢和频率稳定性差的问题，提出了一种基于微分自适应的虚拟惯量和阻尼控制策略。首先，对频率波动的4个典型阶段中虚拟转子角频率偏差及其变化率进行了分析；然后，基于该分析引入微分控制项，进而提出了一种新型自适应虚拟惯量和阻尼调节方法，该方法可以在频率波动初期抑制频率偏差尖峰，并增强对频率变化率的感知能力；最后，仿真结果表明，与传统方法相比，改进方法能够显著减小频率偏差的振荡幅度，加快恢复速度，并在稳态阶段提升系统的稳定性。

Abstract:

Aiming at the slow dynamic response and poor frequency stability of traditional virtual inertia control, a virtual inertia and damping control strategy based on differential adaptive is proposed. Firstly, the virtual rotor angular frequency deviation and its change rate in four typical stages of frequency fluctuation are analyzed. And then, a novel adaptive virtual inertia and damping regulation method is given by introducing a differential control term, which can suppress the frequency deviation spikes at the early stage of frequency fluctuation and enhance the ability to perceive the frequency change rate. Finally, simulation results show that the improved method can significantly reduce the oscillation amplitude of frequency deviation, accelerate the recovery speed, and enhance the stability of the system in the steady state compared with the traditional methods.