一种CIGREHVDC标准模型锁相环的改进方法  

An improved method of phase-locked loop of CIGRE HVDC benchmark model

作　　者：刘俊勇[1] 王维庆[1] 王海云[1] 唐新安 刘杰[3] 李建[1] 时光[1] 

机构地区：[1]新疆大学电气工程学院可再生能源发电与并网技术教育部工程研究中心,乌鲁木齐830047 [2]金风科技股份有限公司,乌鲁木齐830026 [3]国网新疆电力公司检修公司,新疆阜康831500

出　　处：《电测与仪表》2015年第9期77-81,124,共6页Electrical Measurement & Instrumentation

基　　金：新疆研究生科研创新项目(XJGRI2014030);博士点专项基金项目(20126501130001);教育部创新团队项目(IRT1285)

摘　　要：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。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 .

关 键 词：高压直流输电 锁相环 前置滤波 触发脉冲 不对称故障 

分 类 号：TM762[电气工程—电力系统及自动化]