Voltage transformer with capacitive coupling

Mask and Parameters

General tab:

Capacitive Divider

C1, C2: Capacitances of voltage divider (farad or pu)

Tuning Circuit Parameters

Rc	Tuning circuit resistance (ohm or pu)
Lc	Tuning circuit inductance (henry or pu)
Cc	Tuning circuit capacitance (farad or pu)

The values of these parameters are chosen so that the resonance frequency
of the series impedance on the secondary side is 60 Hz.

Load Parameters

R, RL, LL: Load resistances (ohm or pu) and load inductance (henry or pu)

Primary Winding Parameters

Np	Number of turns (default: np = 18240)
Rp, Lp	Leakage resistance (ohm or pu) and inductance (henry or pu)
Cp	Stray capacitance (farad)
Rm	Resistance (ohm) representing magnetization losses

Secondary Winding Parameters

Ns	Number of turns (default: ns = 100)
Rs, Ls	Leakage resistance (ohm or pu) and inductance (henry or pu)

Saturation tab:

Saturation parameters:

Number of points	Number of segments of the current-flux saturation curve; only the positive part of the curve must be specified, the negative part being completed by symmetry
Saturation current	The peak value of the current (in ampere or pu) for each segment of the saturation curve. The origin (0.0,0.0) is implied. The number of segments must be equal to the parameter “number of points”
Saturation flux	The peak value of the flux (in volt-second or pu) for each segment of the saturation curve. The origin (0.0,0.0) is implied. The number of segments must be equal to the parameter “number of points”

Note that in this model, the saturation branch is located on the primary side of the transformer. Therefore, the saturation current and flux parameters should be referred to that side.

Ports, Inputs, Outputs and Signals Available for Monitoring

Ports

Net_1

Primary winding connection (supports only 3-phase connections)

Inputs

None

Outputs

None

Sensors

VOUT(a,b,c)	Output voltage (V)
VMAG(a,b,c)	Voltage in magnetization branch (V)
IMAG(a,b,c)	Magnetization current (A)
FLUX(a,b,c)	Mutual flux in the transformer (V.s)

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