基于正交频分复用-多进制正交幅度调制的DC-DC变换器能量信息一体化技术  

Power Information Integration Technology of DC-DC Converters Based on Orthogonal Frequency Division Multiplexing-Multiple Quadrature Amplitude Modulation

作　　者：郭昊 李岩[1] 侯冰冰 井永腾[1] Guo Hao;Li Yan;Hou Bingbing;Jing Yongteng(College of Electrical Engineering Shenyang University of Technology,Shenyang 110870 China)

机构地区：[1]沈阳工业大学电气工程学院,沈阳110870

出　　处：《电工技术学报》2023年第16期4353-4365,共13页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金智能电网联合基金资助项目(U2166213)。

摘　　要：电力电子变换器通过功率与数据信息的复合调制,可使其在电能变换传输的同时进行数据信息的传输,从而实现能量信息一体化。该文以交错并联DC-DC变换器为研究对象,提出基于正交频分复用-多进制正交幅度调制(OFDM-MQAM)的能量信息一体化方法,并详细介绍变换器进行OFDM-MQAM的原理和具体实现方式,使能量信息一体化传输中的通信速率得到提升。建立变换器传输电能和信息的数学模型,在模型基础上计算分析输出电压纹波与数据信息传输的关系,并以此提出带有码元组合补零环节的OFDM-MQAM,大幅优化通信所引起的电压纹波。此外,针对多路载波引起的相位延时,通过所设计的解调环节避免OFDM系统的信道间和符号间干扰。最后通过一台交错并联的5 V/10 V Boost变换器完成了技术方法的实验验证。The power electronic converters can transmit data information while converting and transmitting power based on the power information multiplexed modulation,which makes the power information integration a reality.Optimizing the voltage ripple caused by communication while improving its communication rate can enhance the power information integrated capability more comprehensively.Therefore,this paper proposes a power information integrated method based on orthogonal frequency division multiplexing-multiple quadrature amplitude modulation(OFDM-MQAM),and uses an interleaved parallel DC-DC converter to analyze and implement it.Firstly,the output voltage ripple of the converter is analyzed based on the introduction of OFDM,MQAM,and power data dual-carrier modulation.The principle of the converter for OFDM-MQAM is clarified,and the mapping relationship between the data information and the specific harmonic components in the output voltage is established.Secondly,based on the implementation process of OFDM-MQAM in the existing communication field,the type of data carrier,the design of demodulation link,and other aspects are optimized by combining the actual control characteristics of the converter.The power information integrated method based on OFDM-MQAM is obtained,and the power data dual-carrier modulation process is described in detail.Thus,the purpose of multiple parallel transmissions of multi-decimal data information is achieved,and the communication rate is improved.Thirdly,the mechanism of voltage ripple caused by communication is clarified by modeling and analyzing the converter state variables before and after the data information switching time,and a solution is proposed.The core of the method is to make the output voltage value at the data information switching time similar or equal to the DC component of the output voltage.The peak value of the output voltage ripple is smaller when no-data carrier is involved than when the data carrier is involved in modulation.Thus,the no-data carrier modulation period ca

关 键 词：能量信息一体化 正交频分复用 多进制正交幅度调制 电压纹波优化 

分 类 号：TM46[电气工程—电器] TN91[电子电信—通信与信息系统]