英文名字：Frequency Series Resonan 变频谐振由隔离变压器、调频调压电源、激励变压器、电抗器和电容分压器组成。被试品的电容与电抗器构成串联谐振连接方式；分压器并联在被试品上，用于测量被试品上的谐振电压，并作过压保护信号；调频功率输出经激励变压器耦合给串联谐振回路，提供变频谐振的激励功率。
通过变频谐振方法成功实施现场高压交联电缆试验的实例论证了变频谐振现场试验的有效性。
The validity of on-site variable frequency resonance test for 110kv XLPE power cable is discussed based on some on-site tests.
采用德国西门子IGBT变频，电压反馈串联谐振电路。变换效率高达97.5%以上。
Adopt IGBT frequency conversion of German Siemens and voltage feedback series resonance circuit. The conversion efficiency is reaching up to above 97.5%.
为此，根据设备容量和试验等效性要求，论证采用变频串联谐振耐压试验的必要性、紧迫性和可行性。
As per the equipment capacity and test equivalence demands, this paper demonstrates the necessity, urgency and feasibility of applying variable-frequency series-resonant voltage withstand tests.
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