Research on a New Hysteresis Control Technology for Flexible High-voltage Direct Current Transmission
The nearest level approximation control algorithm(nlm)is employed for multi-level multi-module(mmc)in the flexible high-voltage direct current(hdvc)converter.The decimal part of this algorithm needs to input sine digital pulse width modulator(dpwm),however,since the dpwmis too sensitive and less stable,the output digital pulse becomes too narrow and the digital signal frequency changes too fast.In order to solve the multilevel problems of the inverter frequency operation,the hysteretic Schmidt comparison method is proposed to meet the requirement of precision.This method can not only ensure the stability of the output digital signal,but also can adjust the hysteretic Schmidt trigger threshold,obtain more ideal digital pulse width which reduces the digital signal output frequency and make digital output signals stable and the pulse width,the grading sorting algorithm and guarantee the reduction of the output control pulse frequency.The feasibility of the method is verified through simulation and the actual running results of this method in field-programmable gate array(fpga)show that the study of nlm control algorithm can optimize the flexible hvdc control requirements.
high-voltage direct current hysteresis control triangular carrier wave
Dian Zhang Qingliang Qin Bo Wang
College of Automation & Electronic Engineering,Qingdao University of Science & Technology,NO.99,Song Engineering Department,China National Automation Control System Corp.,No.2,Tuanjiehu North Road,Beij
国际会议
西安
英文
472-477
2018-09-21（万方平台首次上网日期，不代表论文的发表时间）