论文标题
网格形成VSC的控制：自适应快速/缓慢内部电压源的视角
Control of Grid-Forming VSCs: A Perspective of Adaptive Fast/Slow Internal Voltage Source
论文作者
论文摘要
网格形成（GFM）功能要求越来越多地对网格连接的电压源转换器（VSC）施加。在大型网格干扰下，GFM-VSC需要在提供GFM服务的同时保持稳定。然而，如本文所指出的那样，这种目标本质上导致了对GFM-VSC的内部电压源（IVS）动态的冲突要求，即需要快速的IVS动力学，以避免与网格的同步丧失，而慢速IVS动力学则是维持GFM能力的慢速动力学。为了应对这一挑战，提出了自适应的快速/慢速IVS控制，它根据系统需求将GFM-VSC切换在快速和慢速IVS动力学之间。所提出的方法增强了GFM-VSC的瞬态稳定性，同时最大程度地提高了其提供GFM服务的能力。此外，该方法对不同的网格强度和不同类型的网格干扰是可靠的。实验结果验证了所提出的控制方法的理论发现和有效性。
Grid-forming (GFM) capability requirements are increasingly imposed on grid-connected voltage-source converters (VSCs). Under large grid disturbances, GFM-VSCs need to remain stable while providing GFM services. Yet, such objectives, as pointed out in this paper, inherently lead to conflicting requirements on the dynamics of internal voltage source (IVS) of GFM-VSCs, i.e., the fast IVS dynamics is needed to avoid the loss of synchronism with the grid, whereas the slow IVS dynamics is preferred for maintaining GFM capability. To tackle this challenge, an adaptive fast/slow IVS control is proposed, which switches GFM-VSC between fast and slow IVS dynamics based on system needs. The proposed method enhances the transient stability of GFM-VSC, whilst maximizing its capability of providing GFM service. Further, the approach is robust to different grid strengths and different types of grid disturbances. The experimental results verify the theoretical findings and the effectiveness of the proposed control method.
