CAJ | 학술논문

为了实时追踪换相电压的相位变化，提升高压直流输电（High Voltage Direct Current，HVDC）系统换流器脉冲触发装置的控制精度，文章在传统高压直流输系统脉冲触发控制装置的基础上，通过增加特殊的前置滤波装置来滤除故障时换相线电压的谐波和噪声，提出了一种改进的锁相环（ Phase Locked Loop ， PLL）同步倍频技术，有效的提高了触发脉冲的控制精度。基于国际大电网会议（ International Council on Large Electric Systems ， CIGRE）提出的HVDC第一标准模型，加入文章所提的改进锁相环模型，通过对比交流不对称故障情况下锁相环改进前后的触发脉冲波形，结果表明改进后的锁相环模型可使换流器脉冲触发装置即使在换相电压非对称且含有谐波时仍能发出等间隔的触发脉冲，提高了换流器脉冲触发控制系统的适应性。
위료실시추종환상전압적상위변화，제승고압직류수전（High Voltage Direct Current，HVDC）계통환류기맥충촉발장치적공제정도，문장재전통고압직류수계통맥충촉발공제장치적기출상，통과증가특수적전치려파장치래려제고장시환상선전압적해파화조성，제출료일충개진적쇄상배（ Phase Locked Loop ， PLL）동보배빈기술，유효적제고료촉발맥충적공제정도。기우국제대전망회의（ International Council on Large Electric Systems ， CIGRE）제출적HVDC제일표준모형，가입문장소제적개진쇄상배모형，통과대비교류불대칭고장정황하쇄상배개진전후적촉발맥충파형，결과표명개진후적쇄상배모형가사환류기맥충촉발장치즉사재환상전압비대칭차함유해파시잉능발출등간격적촉발맥충，제고료환류기맥충촉발공제계통적괄응성。
In order to track phase change of commutation voltage and improve the control precision of high voltage di -rect current transmission ( HVDC) pulse triggering device , An improved PLL synchronous frequency multiplying tech-nology , which can improve the control precision of the trigger pulse is proposed in this paper .The technology is based on the trigger pulse control device of the traditional HVDC transmission system , through filtering the harmonic and noise of commutation line-voltages during faults by a special pre-filtering device .Based on HVDC first benchmark model proposed by CIGRE , the improved PLL model mentioned in this thesis is added .Then comparing the trigger pulse waveform of before and after PLL improvement under AC unbalanced fault conditions , the results show that the converter pulse triggering device of the improved PLL model can still send out interval trigger pulse , which can in-crease the adaptability of the converter pulse triggering control system .