Capacitive Voltage Transformers (CVTs) are common in high-voltage transmission line applications. These same applications require fast, yet secure protection. However, as the requirement for faster protective relays grows, so does the concern over the poor transient response of some CVTs for certain system conditions.
Solid-state and microprocessor relays can respond to a CVT transient due to their high operating speed and increased sensitivity .This paper discusses CVT models whose purpose is to identify which major CVT components contribute to the CVT transient. Some surprises include a recommendation for CVT burden and the type of ferroresonance-suppression circuit that gives the least CVT transient.
This paper also reviews how the System Impedance Ratio (SIR) affects the CVT transient response. The higher the SIR, the worse the CVT transient for a given CVT .
Finally, this paper discusses improvements in relaying logic. The new method of detecting CVT transients is more precise than past detection methods and does not penalize distance

電容式電壓互感器（CVTs）在高壓輸電線(xiàn)路應(yīng)用中篅@＜Ｕ廡┫嗤撓τ瞇枰燜俁野踩謀；ぁＨ歡?，由釉溤更繑讨\；に俁鵲男棖蟮腦齔?，考聣q講渙莢萏?，君fㄓ靡恍〤VTs作為系統(tǒng)的必要條件。
固態(tài)繼電器和微處理器繼電器由于其高處理速度和靈敏度，能夠響應(yīng)暫態(tài)電容式電壓互感器。此文闡述了旨在確定電容式電壓互感器模型的主要組成部分對(duì)電容式電壓互感器做出的貢獻(xiàn)。一項(xiàng)電容式電壓互感器的負(fù)荷建議和鐵磁諧振抑制電路的類(lèi)型，使電容式電壓互感器暫態(tài)達(dá)到最小。