作　　者： (王兴亮）; (姚钢）; (周荔丹）; (王丰华）; (顾临峰）; (王杰）;

机构地区： 上海电力学院电气工程学院,上海202157

出　　处： 《电网与清洁能源》 2017年第7期97-104,109,共9页

摘　　要： 为更加全面、深入研究双馈风力发电系统振荡现象,提高DFIG风电场系统并网的稳定性和可靠性,基于某公司风电机组脱网故障的研究背景,引入了电力系统间谐波振荡的新概念来描述DFIG风电场系统的振荡现象。首先从间谐波的角度对双馈风电网系统的振荡机理进行研究分析,其次通过PSCAD仿真模拟实际的脱网故障,最后利用MATLAB对仿真数据进行分析处理,从而验证了相应频率风速的振荡也是DFIG风电场系统振荡的成因之一,由于风速存在一定频率的振荡导致DFIG系统中产生了间谐波,以至于间谐波与基波的相互叠加造成了双馈风力发电系统发生振荡现象。提出的间谐波振荡对今后风力发电系统的稳定性分析提供了一种新的思路。 In order to make a more comprehensive and deep study on the phenomenon of oscillation in the doubly-fed induction generation system, and improve the stability and reliability of the DFIG wind farm system connected to the grid, this paper introduces a new concept of the power system to describe the oscillation of the DFIG wind farm system based on the study on the off-grid faults of wind turbines of a certain company. First, the paper studies and analyzes the oscillation mechanism of the DFIG system from the perspective of inter harmonics, and then simulates the off-grid faults by PSCAD and finally analyzes the simulation data using MATLAB to verify that the wind speed oscillation of the corresponding frequency is also one of the causes of the DFIG wind farm system oscillation. Because the wind speed oscillates to a certain frequency, inter harmonic generation appears in the DFIG system, and the superposition of the inter harmonies and fundamental wave gives rise to the DFIG system oscillation phenomenon. The inter harmonic oscillation proposed in this paper provides a new idea for the stability analysis of wind power generation system in the future.

关 键 词： 风电场 谐波振荡