高比例新能源和电力电子设备电力系统的宽频振荡研究综述

Review of Wide-band Oscillation in Renewable and Power Electronics Highly Integrated Power Systems

电力系统正逐步向高比例新能源和高比例电力电子设备趋势发展,而电力电子设备与电网之间相互作用引起的宽频振荡成为影响电网安全稳定运行的重要问题之一。该文首先阐述了电力系统电力电子化趋势对电力系统振荡的影响,并从广义角度对电力系统宽频振荡进行定义。其次,与传统电力系统的振荡进行对比,对宽频振荡的形态特征进行总结,分析了宽频振荡的形成机制。然后,整理了宽频振荡的数学模型、时空分布特性和抑制措施等方面的研究现状,指出宽频振荡研究目前存在的问题及面临的挑战。最后,分别从宽频振荡的建模方法、特征分析、机理研究及抑制措施等4个方面,提出了电力系统宽频振荡的研究思路和方法。

High proportion of renewables and high proportion of power electronics gradually becomes a significant feature of the power systems.However,the wide-band oscillation resulting from the interaction between power electronics and the power grid is one of the important problems for power system stability.First,the influence of power electronic trend on power system oscillation was discussed,and the definition of wide-band oscillation was introduced in a broad sense.Secondly,wide-band oscillation was compared with the traditional oscillation of power systems.The morphological characteristics of wide-band oscillation were summarized,and formation mechanism were analyzed.Then,the present research status,including mathematical model,spatial-temporal characteristics and suppression measures were outlined,and then the existing problems and challenges in researching of wide-band oscillation were pointed out.Finally,the research approaches and methods of wide-band oscillation in renewables and power electronics highly integrated power systems were put forward from four aspects:modeling method,mechanism research,propagation characteristics and suppression measures.