| 引用本文: | 查明,熊桥坡,罗志清,李纵,赵小波,龙根,刘庆.大功率极低频电源谐波传导分析[J].电力自动化设备,2017,37(4): |
| ZHA Ming,XIONG Qiaopo,LUO Zhiqing,LI Zong,ZHAO Xiaobo,LONG Gen,LIU Qing.Analysis on harmonic transmission of ELF power-supply[J].Electric Power Automation Equipment,2017,37(4): |
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| 摘要: |
| 极低频(ELF)电源在地下资源探测、地震预测和军事通信等领域发挥着重要作用。然而，极低频电源逆变侧产生的低频谐波分量难以被滤除，将在逆变侧输入端形成纹波电压，恶化极低频电源的输出谐波特性。低频谐波分量还将渗透直流滤波网络向整流侧和电网传导，造成整流输出端电感电流波动，并在网侧电流基波和特征次谐波附近产生低频相关的边带谐波。建立了极低频电源的数学模型，重点关注逆变侧输入端电容电压和整流侧输出端电感电流，对低频谐波传导进行了分析，并对理论分析进行了仿真验证。 |
| 关键词: 极低频电源 谐波传导 双LC滤波器 纹波电压 边带谐波 |
| DOI：10.16081/j.issn.1006-6047.2017.04.025 |
| 分类号:TM71 |
| 基金项目:“十一五”国家重大科学技术基础设施建设项目(极低频探地(WEM)工程) |
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| Analysis on harmonic transmission of ELF power-supply |
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ZHA Ming, XIONG Qiaopo, LUO Zhiqing, LI Zong, ZHAO Xiaobo, LONG Gen, LIU Qing
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Laboratory of Low-frequency Electro-magnetic Communication Technology with the 722 Research Institute, CSIC, Wuhan 430205, China
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| Abstract: |
| ELF(Extremely Low-Frequency) power-supply plays an important role in underground resource exploration, earthquake prediction and military communication. It is difficult to filter the low-frequency harmonic components generated at the inverter side of power-supply, which may induce the ripple voltage at the input side of inverter to deteriorate the output harmonic characteristics of power-supply and, after transmitted via DC filter network to the rectifier side and grid, cause the inductor current fluctuation at the output side of rectifier and the low-frequency sideband harmonics near the fundamental and characteristic sub-harmonics of grid-side current. A mathematical model of ELF power-supply is established, the capacitor voltage at the input side of inverter and the inductor current at the output side of rectifier are researched, the transmission of low-frequency harmonics is analyzed, and simulative verification is carried out for the theoretical analysis. |
| Key words: extremely low-frequency power-supply harmonic transmission dual-LC filter ripple voltage sideband harmonic |
