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Designing a compensating electronic circuit to enhance capacitive voltage transformer characteristics

机译：设计补偿电子电路以增强电容式电压互感器的特性

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Capacitive voltage transformer (CVT) is widely used to convert high voltage signals to low voltage ones for measurement, protection and control. It has poor dynamics which can lead to maloperation of protective relays. Moreover, CVT has a non-smooth frequency response and limited band width which make it inappropriate for system harmonic measurements. This paper proposes a new method for decreasing CVT voltage distortions and correcting CVT dynamic response as well as its steady state response. An electronic circuit is designed so as to reproduce CVT transients. The final output which is the summation of CVT voltage and the designed circuit voltage has considerably low distortions and is a replica of the input voltage. The proposed method is independent of the load and the Ferroresonance Suppression Circuit (FSC) connected to the CVT. Simulation results confirm the efficiency and accuracy of the proposed method. Finally, CVT percentage error for the proposed method is compared with the dynamic compensation method.
机译：电容式电压互感器（CVT）广泛用于将高压信号转换为低压信号，以进行测量，保护和控制。它的动态性能很差，可能导致保护继电器误动作。此外，CVT具有不平滑的频率响应和有限的带宽，这使其不适用于系统谐波测量。本文提出了一种减少CVT电压畸变，校正CVT动态响应及其稳态响应的新方法。设计电子电路以重现CVT瞬变。最终输出是CVT电压与设计电路电压的总和，失真很小，是输入电压的复制品。所提出的方法独立于负载和连接至CVT的铁磁谐振抑制电路（FSC）。仿真结果证实了该方法的有效性和准确性。最后，将所提方法的CVT百分比误差与动态补偿方法进行了比较。

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