| 引用本文: | 祝 贺,谢志远,曹旺斌,等.基于功率控制环扰动的DC-DC变换器能量信息一体化研究[J].电力系统保护与控制,2024,52(7):149-156. |
| ZHU He,XIE Zhiyuan,CAO Wangbin,et al.Power-information integration in DC-DC converters based onpower control loop perturbation[J].Power System Protection and Control,2024,52(7):149-156 |
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| 摘要: |
| 针对实现DC-DC变换器之间的信息交互较为复杂的问题，提出了一种基于功率控制环扰动实现其能量信息一体化的方法。通过在DC-DC变换器的传统功率控制环中叠加二进制频移键控(binary frequency shift keying, 2FSK)信号作为扰动，将数据信息叠加到传统脉冲宽度调制(pulse-width modulation, PWM)信号中，使得该PWM信号同时包含数据信息，实现能量信息一体化。首先，给出基于2FSK的功率/数据双载波调制以及实时的滑动离散傅里叶变换(sliding discrete Fourier transform, SDFT)解调方案。然后，通过对Buck变换器的能量信息一体化模型进行小信号建模与分析可知，降低输入阻抗可提升通信的信噪比。最后搭建一个由两个Buck变换器并联的实验装置进行验证。实验结果表明在稳态和负载突变的工况下均可实现3 kb/s的稳定通信，验证了所提方法的可行性。该方法使得DC-DC变换器能同时进行功率变换和数据传输，提升数字化和智能化水平。 |
| 关键词: 扰动信号 二进制频移键控 滑动傅里叶变换 功率/数据双载波调制 能量信息一体化 |
| DOI：10.19783/j.cnki.pspc.230885 |
| 分类号: |
| 基金项目:国家自然科学基金项目资助(52177083，62001166)；河北省省级科技计划项目资助(SZX2020034) |
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| Power-information integration in DC-DC converters based onpower control loop perturbation |
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ZHU He1, 2, XIE Zhiyuan1, CAO Wangbin1, 2, HU Zhengwei1
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1. School of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, China; 2. Hebei Key
Laboratory of Power Internet of Things Technology (North China Electric Power University), Baoding 071003, China
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| Abstract: |
| To address the complex issue of information exchange between DC-DC converters, this paper proposes a method that integrates power and information by introducing perturbations into the power control loop. By superimposing binary frequency shift keying (2FSK) signals as perturbations in the traditional power control loop of the DC-DC converters, data information is embedded into the conventional pulse-width modulation (PWM) signal, enabling the PWM signal to simultaneously carry data information, thus achieving the integration of power and information. First, this paper presents a power/data dual carrier modulation scheme based on 2FSK and a real-time sliding discrete Fourier transform (SDFT) demodulation scheme. Subsequently, it is evident from the small-signal modeling and analysis of the power-information integration model of the Buck converter that reducing the input impedance can enhance the signal-to-noise ratio of communication. Finally, an experimental set-up consisting of two parallel Buck converters is constructed for validation. Experimental results demonstrate stable communication at a rate of 3 kb/s in steady-state and load transient conditions, confirming the feasibility of the proposed method. This method enables DC-DC converters to simultaneously perform power conversion and data transmission, thereby enhancing digitization and intelligence levels. |
| Key words: perturbation signal binary frequency shift keying (2FSK) sliding discrete Fourier transform power/data dual carrier modulation power-information integration |
