CAJ | 학술논문

为了实时跟踪电网频率的变化,提高直流输电系统中换流器触发脉冲控制精度,提出了一种基于新型全数字锁相环的同步倍频技术.该新型数字锁相环在传统数字锁相环的基础上加入了自适应模值控制模块,大幅提高了锁相速度和精度.在此基础上,利用近似补偿方法设计出的同步倍频模块能在高精度要求下对电网频率同步任意倍频,给换流器触发控制系统提供精准的时钟基准,提高相位控制精度,削弱换流器产生的非特征谐波.利用现场可编程门,阵列(FPGA)为载体,在QUARTUSⅡ软件环境下,设计出了基于全数字锁相环的同步倍频装置,并通过软件仿真和实验测试验证了该技术的正确性和优越性.
위료실시근종전망빈솔적변화,제고직류수전계통중환류기촉발맥충공제정도,제출료일충기우신형전수자쇄상배적동보배빈기술.해신형수자쇄상배재전통수자쇄상배적기출상가입료자괄응모치공제모괴,대폭제고료쇄상속도화정도.재차기출상,이용근사보상방법설계출적동보배빈모괴능재고정도요구하대전망빈솔동보임의배빈,급환류기촉발공제계통제공정준적시종기준,제고상위공제정도,삭약환류기산생적비특정해파.이용현장가편정문,진렬(FPGA)위재체,재QUARTUSⅡ연건배경하,설계출료기우전수자쇄상배적동보배빈장치,병통과연건방진화실험측시험증료해기술적정학성화우월성.
A synchronous frequency multiplication technology based on total DPLL(Digital Phase-Locked Loop)is presented to follow grid frequency in real time and improve the pulse control precision of converter in direct current transmission system,which adds a parameter-adaptive control module to traditional DPLL to improve the phase-lock speed and precision.The synchronous frequency multiplication module designed by the approximate compensation method based on it can multiply the grid frequency by any times to provide precise clock for the control system of converter to improve the phase control precision and reduce the noncharacteristic harmonic.The synchronous frequency multiplication device based on total DPLL is designed in QUARTUS Ⅱ environment with FPGA(Field Programmable Gate Array).The simulative and experimental results prove the correctness and advantage of the proposed technology.