Suzhou Electric Appliance Research Institute
期刊號: CN32-1800/TM| ISSN1007-3175

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動態(tài)負(fù)載下PSM電源的諧波研究

來源:電工電氣發(fā)布時間:2021-10-21 13:21 瀏覽次數(shù):592

動態(tài)負(fù)載下PSM電源的諧波研究

林華輝1,陽璞瓊1,2
(1 南華大學(xué) 電氣工程學(xué)院,湖南 衡陽 421001;
2 南華大學(xué) 磁約束核聚變研究重點(diǎn)實(shí)驗(yàn)室,湖南 衡陽 421001)
 
    摘 要:動態(tài)負(fù)載造成的諧波會影響電網(wǎng)電能質(zhì)量,危害系統(tǒng)安全運(yùn)行。利用 MATLAB/Simulink 建立離子回旋共振加熱 (ICRH) 的 PSM 高壓電源模型,分析了靜態(tài)與動態(tài)下不同負(fù)載特性的諧波含量以及純阻性下各種負(fù)載動態(tài)產(chǎn)生的特征次諧波含量,對比各次數(shù)諧波含量后,判斷負(fù)載大致變化趨勢。仿真結(jié)果表明,感性和容性負(fù)載對總諧波畸變率影響很小,而動態(tài)阻性負(fù)載產(chǎn)生較大的總諧波畸變率,多集中在 24 脈波整流產(chǎn)生的 24k ±1 次以及 2~8 次的低次諧波;阻值動態(tài)范圍越大,低次諧波越嚴(yán)重。
    關(guān)鍵詞:離子回旋共振加熱;高壓電源;動態(tài)負(fù)載;總諧波畸變率
    中圖分類號:TM714 ;TN86     文獻(xiàn)標(biāo)識碼:A     文章編號:1007-3175(2021)10-0007-05
 
Research on Harmonics of PSM Power Supply under Dynamic Load
 
LIN Hua-hui1, YANG Pu-qiong1,2
(1 School of Electrical Engineering, University of South China, Hengyang 421001, China;
2 The Key Laboratory of Magnetic Confinement Nuclear Fusion Research, University of South China, Hengyang 421001, China)
 
    Abstract: Dynamic loads could cause harmonics. It might affect the quality of the power grid and endanger the safe operation of the system.This paper used MATLAB/Simulink to establish a PSM high-voltage power supply model for ion cyclotron resonance heating (ICRH).Herein, analyzed the harmonic content of different load characteristics under static and dynamic conditions and the characteristic subharmonic content generated by various loads under pure resistance.After comparing the harmonic content of each order, judge the general change trend of the load.The simulation results show that inductive and capacitive loads have little effect on THD, while dynamic resistive loads produce larger THD, mostly concentrated in the 24k ±1 order and 2~8th low-order harmonics generated by 24-pulse rectification.In addition,the larger the dynamic range of the resistance, the more serious the low-order harmonics.
    Key words: ion cyclotron resonance heating (ICRH); high-voltage power supply; dynamic load; total harmonic distortion rate
 
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