摘要
由于开关管通断过程产生的谐波以及谐波引起的系统不稳定等因素,配电网静止同步补偿器(DSTATCOM)需要选用合适滤波器进行调节。而在保持总电感量相同的情况下,LCL型滤波器比L型滤波器有着显著的优势,因此,本文分别从滤波器对输出电压基波压降、DSTATCOM无功补偿的影响、补偿电流的开关谐波衰减度这三个方面分析了LCL滤波性能,基于这些分析并结合LCL滤波器常规设计约束总结出了DSTATCOM并网侧LCL滤波器的设计方法,最后通过实验验证所设计的LCL滤波器具有良好的滤波效果,提高了DSTATCOM系统的稳定性。
Suitable filter is needed for adjustment due to the harmonics generated during switching period of switch and the system instability factor factors caused by the harmonics. On the condition of keeping the total inductance identical,type LCL filter has remarkable advantage compared to type L filter. Therefore, in this paper, the LCL filtering performance is analyzed from such three aspects as fundamental wave voltage drop of output voltage by filter,influence of DSTATCOM reactive power compensation and attenuation of switch harmonics of compensation current respectively and, on the basis of those analysis and also with combination of common design constraint of LCL filter,the design method at the grid- connected side of DSTATCOM is summarized. Finally,it is verified by the test that the designed LCL filter has good filtering result and also improves stability of DSTATCOM system.
出处
《电力电容器与无功补偿》
北大核心
2017年第2期52-57,共6页
Power Capacitor & Reactive Power Compensation
基金
云南省教育厅科学研究基金项目(2015Y411)
