文中以电感电容为输入电路，全面分析了用选频平衡法测量局部放电的原理。
The measurement principle of selective frequency balance method with input circuits of inductance and capacitance for PD detection is analyzed in detail in this paper.
示零器电路改进后的交流电桥，增大了示零器电路的内阻，提高了交流电桥的灵敏度，对任何形式的电容电桥、电感电桥都适用。
The increased internal resistance within an improved zero indicator helps increase the sensitivity of the AC bridge and thus can be available for any type of capacity bridge and induction bridge.
因此建立微波频段电感电容的等效电路模型，提取模型参数，对于实现元件值在电路中的有效控制，以及整个电路性能的把握具有重要意义。
Therefore, the establishment of LC equivalent circuit model and extracting the model parameters are very important for the control of the component values and the circuit performance.
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