Design of a capacitor voltage transformer

High‐voltage electrical energy meter with measurement chips floating at 10 kV potentials

“…The equivalent load of the circuit inside the display terminal is dependent on time under different working modes, which may lead VDR of the CVD to change. Thus, a compensation reactor L is chosen to eliminate this adverse change, and it is similar with the function of reactors in capacitor voltage transformers [30]. The inductance of the reactor is in resonance with the sum of the two capacitors C H and C L at power frequency 50 Hz.…”

Mutual capacitor and its applications

“…In 1936, being an expectation or proposition, the CVT being only a term was presented [4], with no claim made for presenting any new principles of design. One of its earliest practical devices was given and published in 1949 [5]. Today the CVT has been widely used as an instrument transformer in power systems (Fig.…”

Error Analysis of Electric Energy Metering System Considering Harmonics

“…[2] studied the influence of linear and nonlinear loads on active energy measurement,deduced the electric energy consumed by two kinds of load,and put forward the irrationality of measurement mode by simulating with real-time digital system.There are few studies on the influence of harmonics on voltage transformer.Ref. [3] gave the equivalent circuit of captive voltage transformer(CVT) and calculated the error under different loads.As for the research on electromagnetic current transformer(ECT),Ref. [4] calculated the excitation impedance and winding distributed capacitance of ECT,established the ECT model of high frequency,but it is not accurate enough in lower harmonics after simulating.…”