| 改进型DSC的并网锁相环直流偏移消除方法 |
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| 引用本文： | 回楠木,王大志,李云路.改进型DSC的并网锁相环直流偏移消除方法[J].东北大学学报(自然科学版),2018,39(11):1526-1531. |
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| 作者姓名： | 回楠木 王大志 李云路 |
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| 作者单位： | (1. 东北大学 信息科学与工程学院， 辽宁 沈阳110819; 2. 沈阳工业大学 电气工程学院， 辽宁 沈阳110870) |
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| 基金项目： | 国家自然科学基金重点资助项目(61433004); 国家重点研发计划项目(2017YFB130055). |
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| 摘 要： | 针对在SRF-PLL的控制内环中使用延迟信号消除(DSC)算子，放缓了动态行为问题，提出了一种用于电网同步的三相PLL中的快速直流偏移抑制方法.通过使用改进型DSC运算器(MDSC)方法，改进了传统的基于DSC的PLL的动态性能.该方法能够有效地克服系统带宽给直流偏移消除带来的影响，并使系统响应速度得到提升.另外基于MDSC的PLL在相位跳变和频率阶跃变化的调整时间也很小.所提方法的有效性通过仿真实验结果得到证实.
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| 关 键 词： | 直流偏移 同步参考坐标 锁相环 延迟信号消除 相位估计 |
DC-Offset Elimination Method for Grid-Connected Phase-Locked Loop by Modified DSC |
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| HUI Nan-mu,WANG Da-zhi,LI Yun-lu.DC-Offset Elimination Method for Grid-Connected Phase-Locked Loop by Modified DSC[J].Journal of Northeastern University(Natural Science),2018,39(11):1526-1531. |
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| Authors: | HUI Nan-mu WANG Da-zhi LI Yun-lu |
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| Institution: | 1. School of Information Science & Engineering， Northeastern University， Shenyang 110819， China; 2. School of Electrical Engineering， Shenyang University of Technology， Shenyang 110870， China. |
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| Abstract: | The use of delay signal cancellation(DSC)operator in the control inner loop of SRF-PLL slows down the dynamic behavior. A fast DC-offset rejection method for three-phase PLL of grid synchronization is proposed， which improves the dynamic performance of traditional DSC-based PLL by using the modified DSC operator. This method can effectively overcome the influence of the system bandwidth on the DC-offset elimination and improve the response speed of the system. In addition， the adjustment time of the phase jump and frequency step change based on the MDSC-based PLL is also very small. The effectiveness of the proposed method is confirmed through simulation and experiment results. |
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| Keywords: | DC-offset synchronous reference flame phase-locked loop signal delay cancellation phase estimation |
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