The Simulation Research of STATCOM Based on Cascaded Multi-level Converter
Cascaded multi-level converter based STATCOM (CMC-STATCOM),with a topology of modular-cascaded structure,has a wide prospect of applications in both transmission and distribution system.Under the background of application of STATCOM in high voltage power grid,there are many advantages of CMC-STATCOM compared with other kinds of STATCOM.On the basis of mathematical model of main topology,the states feedback decoupled reactive power control strategy based on the d-q coordinate system is studied in this paper,together with the application principle of carrier phase shift PWM modulation method in CMC.The balance of DC bus voltage is a key factor to the stable operation of devices.In this paper,the hierarchical control method is used to achieve a balance of DC bus voltage,and it involves the DC bus voltage overall control and individual control of each cascade module.At last,the simulation results of 10-kV,1-MVA CMC-STATCOM verify the correctness and effectiveness of the control strategy and modulation method in this paper using PSCAD/EMTDC.
cascaded multi-level converter:STATCOM:states feedback decoupled control:carrier phase shift PWM:hierarchical control method of DC bus voltage
Xuefeng Liang Yonghai Xu Xiaolu Chen Chunlin Guo
School of Electric and Electronic Engineering North China Electric Power University Beijing,102206,P.R.China
国际会议
威海
英文
494-498
2011-07-06（万方平台首次上网日期，不代表论文的发表时间）