| 引用本文: | 张振波,王海云,王维庆,刘启德.基于改进型环路滤波器的单相锁相环[J].电力系统保护与控制,2021,49(13):135-141.[点击复制] |
| ZHANG Zhenbo,WANG Haiyun,WANG Weiqing,LIU Qide.Single phase locked loop based on improved loop filter[J].Power System Protection and Control,2021,49(13):135-141[点击复制] |
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| 摘要: |
| 针对单相锁相环(Phase-lock Loop, PLL)受PI控制器饱和抑制造成滤波性能不足这一问题，提出了一种基于改进型环路滤波器的单相锁相环。该锁相环通过增加抗饱和PI控制器，改进环路滤波器，提高滤波性能。在输入同时含有直流和谐波干扰情况下，对电网实时相位进行锁相跟踪，可以明显提高锁相精度。利用Matlab/Simulink平台对改进型单相锁相环在电网畸变时的适应性、抗干扰性进行仿真分析。并基于TMS320F28335 DSP芯片为核心的实验平台进行实验验证，结果表明，该方法能快速准确地跟踪系统频率变化，达到锁相效果。 |
| 关键词: 单相锁相环 环路滤波器 抗饱和控制器 DSP |
| DOI：DOI: 10.19783/j.cnki.pspc.201090 |
| 投稿时间：2020-09-06修订日期：2020-11-29 |
| 基金项目:新疆维吾尔自治区自然科学基金项目资助(2020D01C068)；新疆维吾尔自治区重点研发计划项目资助(2020B02001)；新疆维吾尔自治区高校重大项目资助(XJEDU2017I002) |
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| Single phase locked loop based on improved loop filter |
| ZHANG Zhenbo1，2,WANG Haiyun1，2,WANG Weiqing1，2,LIU Qide1，2 |
| (1. College of Electrical Engineering, Xinjiang University, Urumqi 830047, China;
2. Engineering Research Center for Renewable Energy Generation and Grid Control, Urumqi 830047, China) |
| Abstract: |
| The filtering performance of a Phase-Lock Loop (PLL) is insufficient because of the saturation suppression of PI controller. Thus a single-phase PLL based on an improved loop filter is proposed. The PLL improves the loop filter and the filter performance by adding an anti-saturation PI controller. Where the input contains both DC and harmonic interference, the phase-locking precision can be clearly improved by tracking the real-time phase of the power grid. Matlab/Simulink platform is used to simulate and analyze the adaptability and anti-interference of the improved single-phase PLL when the power grid is distorted. Experimental verification is conducted based on the experimental platform with the TMS320F28335 DSP development board as the core. The results show that this method can quickly and accurately track the frequency change of the system and achieve the phase-locking effect.
This work is supported by the Natural Science Foundation of the Xinjiang Uygur Autonomous Region (No. 2020D01C068). |
| Key words: single-phase PLL loop filter anti-saturation controller DSP |
