Grid-Supporting Inverters With Improved Dynamics
Grid-Supporting Inverters With Improved Dynamics
复制标题
DOI：
10.1109/tie.2018.2850002
复制
发表时间：
2019-05
影响因子：
7.7
通讯作者：
S. A. Khajehoddin;M. Karimi-Ghartemani;M. Ebrahimi
中科院分区：
文献类型：
--
作者：
S. A. Khajehoddin;M. Karimi-Ghartemani;M. Ebrahimi
提出了一种新的逆变器控制方法，称为增强型虚拟同步机（eVSM），基于VSM的概念。与现有的VSM方法不同，eVSM不基于无限能量存储的假设来模拟旋转惯性，但它部署了直流链路元件的物理存在的惯性。eVSM采用了一种创新的方式来扩大惯性利用范围，从而避免了对大型直流链路元件或专用电池存储系统的需求，同时仍然提供与等效同步电机相同的惯性响应。本文提出的理论发展和数值结果证实，建议的eVSM可以提出一个稳定的支持电网类似的同步机，尽管其直流环节元素的小尺寸。此外，由于可以更灵活地调节阻尼和调速器功能，其瞬态响应可以比传统同步电机更好。
A new inverter control approach, called enhanced virtual synchronous machine (eVSM), is proposed based on the VSM concept. Unlike existing VSM approaches, the eVSM does not emulate the rotating inertia based on an assumption of the unlimited energy storage, but it deploys the physically existing inertia of the dc-link element. The eVSM adopts an innovative way of enlarging the inertia utilization range, which obviates the need for having a large dc-link element or a dedicated battery storage system, while still providing the same inertia response of an equivalent synchronous machine. Theoretical developments and numerical results presented in this paper confirm that the proposed eVSM can present a stabilizing support to the grid similar to a synchronous machine despite the small size of its dc-link element. Moreover, its transient responses can be improved beyond those of conventional synchronous machines thanks to the possibility of more flexibly adjusting damping and governor functions.