论文标题
惯性和反馈参数自适应控制虚拟同步发电机
Inertia and feedback parameters adaptive control of virtual synchronous generator
论文作者
论文摘要
虚拟同步发电机技术通过控制器设计类似于同步发电机的特性。它提高了包括新能量在内的网格系统的稳定性。同时，根据虚拟同步发电机参数的可调节特性，参数自适应调整用于改善系统的动态性能。但是，传统的虚拟同步发电机自适应控制技术仍然有两个缺点：一方面，对阻尼下垂系数的大规模调整和惯性的虚拟力矩需要高储能余量；另一方面，瞬态调节过程中有一个电源过时现象，这对动力设备不利。首先，本文提供了一种方便的调整方法来改善系统的瞬态稳定性，通过引入输出速度反馈来调整系统阻尼。其次，根据系统的瞬态功率角度特性，提出了参数自适应控制策略，该策略缩短了瞬态调整时间，并确保瞬态调整过程中系统频率的偏差在允许范围内，并提高电网频率调整的瞬态性能，同时抑制了电源过高。最后，实验结果表明，所提出的控制策略优于现有的自适应控制策略。
The virtual synchronous generator technology analogs the characteristics of the synchronous generator via the controller design. It improved the stability of the grid systems which include the new energy. At the same time, according to the adjustable characteristics of the virtual synchronous generator parameters, the parameter adaptive adjustment is used to improve the dynamic performance of the system. However, the traditional virtual synchronous generator adaptive control technology still has two drawbacks: on the one hand, the large-scale adjustment of the damping droop coefficient and the virtual moment of inertia requires the system having a high energy storage margin; On the other hand, there is a power overshoot phenomenon in the transient regulation process, which is disadvantageous to the power equipment. First, this paper provides a convenient adjustment method for improving the transient stability of the system, the system damping is adjusted by introducing the output speed feedback. Second, according to the transient power-angle characteristics of the system, a parameter adaptive control strategy is proposed, which shortens the transient adjustment time and ensures that the deviation of the system frequency in the transient adjustment process is within the allowable range, and improves the transient performance of the grid frequency adjustment, at the same time, the power overshoot is suppressed. Finally, the experimental results show that the proposed control strategy is superior to the existing adaptive control strategy.
