直流供电系统电容在线测量器的设计与应用

为了测量直流供电系统接地电容,避免直流接地电容对系统带来的潜在危害,同时在不断电的情况下对系统接地电容进行测量,设计了一款直流供电系统电容在线测量器。其使用检测桥来进行系统接地电容的计算,通过切换检测桥来改变直流系统的正负极接地电压,使接地电容完成充放电过程,并记录充放电曲线。再通过一阶电路响应公式,来计算系统的等效接地电容。通过实验测试,该测量器能够准确测量系统的接地电容,测量误差在10%以内,且测量过程中不会对直流系统造成不利影响。

Design and Application of the Capacitor On-Line Measuring Instrument for DC Power Supply System

In order to measure the grounding capacitance of the DC power supply system and avoid the potential harm caused by DC grounding capacitance to the system, and the same time measure the grounding capacitance of the system under the condition of uninterruptible power supply, a capacitor on-line measuring instrument for the DC power supply system is designed in this paper.The system uses the detection bridge to calculate the system ground capacitance. The positive and negative grounding voltage of the DC system is changed by switching the detection bridge, making the grounding capacitor complete the charging and discharging process. The charge and discharge curves are recorded, and the equivalent grounding capacitance of the system is calculated by the response formula of the first order circuit. The experimental testing results show that the measuring device can accurately measure the system''s ground capacitance with an error less than 10%, and the measurement process does not affect the DC system adversely.