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论文:2023,Vol:41,Issue(5):842-849 |
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引用本文： |
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柯善文, 李玉忍. 一种新型级联CDSOGI-PLL的电网电压同步信号检测技术[J]. 西北工业大学学报 |
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KE Shanwen, LI Yuren. A synchronizing signal detection technique for grid voltage based on new CDSOGI-PLL[J]. Journal of Northwestern Polytechnical University |
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| 一种新型级联CDSOGI-PLL的电网电压同步信号检测技术 |
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| 柯善文, 李玉忍 |
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| 西北工业大学 自动化学院, 陕西 西安 710072 |
| 摘要: |
| 基于双二阶广义积分器的锁相环DSOGI-PLL在电网电压含有大量低次谐波时,其滤波效果不理想,锁相环提取的同步信号频率出现波动。在 DSOGI-PLL的基础上,提出一种新型的级联锁相环结构CDSOGI-PLL(cascade second-order generalized integrator PLL)。该结构利用级联的SOGI模块同时削弱电网电压中的各次谐波和间谐波,从而减少谐波对锁相环的影响,准确地提取电网电压同步信号。Matlab仿真和实验结果均表明,文中提出的新型CDSOGI-PLL在电网电压不对称和含有大量低次谐波时能有效、准确地提取基波的正序分量、频率和相位。 |
| 关键词:
锁相环
二阶广义积分器
谐波
基波正序分量
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| A synchronizing signal detection technique for grid voltage based on new CDSOGI-PLL |
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| KE Shanwen, LI Yuren |
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| School of Automation, Northwestern Polytechnical University, Xi'an 710072, China |
| Abstract: |
| When the grid voltage contains many harmonics, the filtering effect of the phase-locked loop based on dual second-order generalized integrator (DSOGI-PLL) is not ideal, and the frequency of synchronous signal extracted through the DSOGI-PLL fluctuates. A novel phase-locked loop structure based on cascade second order generalized integrator (CDSOGI-PLL) is proposed. The structure utilizes the cascaded SOGI module to simultaneously weaken the harmonics and inter-harmonics that exist in the grid voltage, thus reducing the influence of harmonics on the PLL and accurately extracting the grid voltage's synchronous signal. Matlab simulation and experimental results show that the signal detection technique proposed in the paper can effectively extract the fundamental positive sequence component, frequency and phase when the grid voltage is unbalanced and has many harmonics. |
| Key words:
phase-locked loop
second-order generalized integrator
harmonics
fundamental positive sequence component
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| 收稿日期: 2022-10-13
修回日期:
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| DOI: 10.1051/jnwpu/20234150842 |
| 通讯作者: 李玉忍(1962—),西北工业大学教授,主要从事飞机电力系统、电力电子与电力传动研究。e-mail:liyuren@nwpu.edu.cn
Email：liyuren@nwpu.edu.cn |
| 作者简介: 柯善文(1982—),西北工业大学博士研究生,主要从事新能源发电及控制技术研究。
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