摘要
基于虚拟电阻的有源阻尼谐振抑制策略目前已被广泛应用于并网逆变器中,该方法对一定频率范围内的谐振抑制效果明显。然而,在实际风电场中,由于同时存在单机和多机谐振的风险,谐振频率跨度较大,很可能超出有源阻尼有效频率范围,进而加剧谐振。为了确保谐振点都在有源阻尼有效频率范围内,提出了一种基于超前滞后环节的频带扩展方法,仿真和试验结果表明了该方法能够有效地改善有源阻尼在有效频率边界处对谐振的阻尼作用。
Active damping resonance suppression method based on virtual resistance has been widely used in gridconnected inverter at present. This method has obvious effect on resonance suppression within a certain frequency range. However, in the actual wind farm, due to the risk of both single-machine and multi-machine resonance, and the span of single-machine and multi-machine resonance point is large, it is likely to exceed the effective frequency range of active damping of virtual resistance, thus exacerbating the resonance problem. In order to ensure that the resonant points of single machine and multi-machine are within the effective frequency range of active damping, a band expansion method based on the lead-lag link is proposed. Simulation and test results show that this method can effectively improve the damping effect of active damping on resonance at the effective frequency boundary.
作者
王瑞
徐志英
孙素娟
孔祥梅
曲慧星
宋良全
WANG Rui;XU Zhiying;SUN Sujuan;KONG Xiangmei;QU Huixing;SONG Liangquan(Nari Technology Development Limited Company,Nanjing 211106,China)
出处
《电气应用》
2020年第10期75-81,共7页
Electrotechnical Application
基金
2018年度国家重点研发计划资助项目(2018YFB0904003)。
关键词
谐振
有源阻尼
虚拟电阻
超前滞后
resonance
active damping
virtual resistance
lead-lag
