The quot; q quot; calculate and discuss about impedance peak in rl - c parallel resonance circuit 值的计算和阻抗峰值的讨论
4.
The way of taking one nth out of capacitor ' s the first harmonic capacitive reactance as its nth harmonic impedance is verified whit the data from tang7c . according to the approximately estimating method , the first harmonic impedance of 220kv system is calculated . on the basis of the models , this paper gives the harmonic equivalent circuit of substation and gives the b ( n ) function of the harmonic time n . when the capacitors has different combination , b ( n ) ' s value will also change , with the inputting local measurement data , the paper studies the series and parallel resonance at the substation , and deduces that the reason the capacitor ' s fuse of tang6c is frequently interrupted is that its capacitor current contains a large number of 5th harmonics , and that the reason the discharging pt of tang7c capacitor being exploded is also that the 7th and 9th harmonic currents are amplified 据此，对该站进行了串联谐振分析和并联谐振分析，并结合测试数据和有关变电站的运行记录，指出了导致该站电容器汤6c频繁烧保险的主要原因是5次谐波电流含量偏高，引起汤7c放电pt爆炸也是因为7次和9次谐波电流被放大。针对这些导致汤阴变电站补偿电容器故障的原因，提出了相应的谐波治理措施，包括针对汤6c电容器5次谐波电流含量偏高的原因，提出了停运汤6c电容器或者通过把汤sc电容器的部分容量并入汤6c电容器(汤sc其余部分停运)以增加汤6c谐波承受能力的措施;针对# 2变低压侧7次和9次谐波电流被放大的现象，提出了在汤7c电容器上加装一定百分比的串联电抗器的措施。
5.
Based on the special load of the contactless system , this paper analyses and contrasts the principle and feature of the series and parallel resonance circuit . design the high frequency full - bridge series resonance converter and make the main circuit apply to the contactless electrical power deliver system and analyses the process of the main circuit in detail 根据无接触电能传输系统特殊的负载特性，详细分析并对比了并联和串联逆变器的工作原理及电路特点，设计出应用于无接触系统中的高频全桥串联谐振逆变器的拓扑结构，进而设计并制作了系统的主电路，详细的分析了主电路的工作过程。
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