Capacitor

Single-phase ideal capacitor. The current-voltage relation is i = C dv/dt; the simulator integrates it with a trapezoidal companion model. Use C in farads.

Aliases: CSim_comp_elec_cap

Category: Single-Phase / Passive

Keywords: 1-phase, 1-ph, 1 ph, 1ph, single, single-phase, single phase, phase, ph, C, F, farad, cap, passive

Ports

Name	Direction	Value type	Notes
p	electrical	double
n	electrical	double

Parameters

Config

Name	Label	Type	Default	Units	Description
capacitance	C	double	0.01	F (F, μF, pu, S, B.pu)	Capacitance value. Pick a unit from the dropdown; pu / B (Siemens susceptance) / B.pu conversions read the bases from the Units tab.
measure_current	Measure current	enum (Off / On)	0	—	Emit branch current as a simulator observable.

Current Monitoring

Name	Label	Type	Default	Units	Description
current_name	Current name	string	I	—	Observable id for the measured branch current. Change the default `I` when you have multiple measured components — duplicate ids collide.

Units

Name	Label	Type	Default	Units	Description
S_base	S_base (MVA)	double	100	—	System base apparent power in MVA. Used by `pu` impedance / admittance conversions in this component's `computations` block.
V_base	V_base (kV)	double	230	—	Base RMS line-to-line voltage in kV. Used by `pu` impedance / admittance conversions in this component's `computations` block.
Freq	Frequency (Hz)	double	60	—	Frequency in Hz. Used by `B` (susceptance) / `X` (reactance) conversions in this component's `computations` block.

Observables

Signal	Type	Default name	Enable	Description
branchCurrent	signal	from current_name	measure_current	Branch current through the capacitor (A).

Used in samples

• Buck
• Full Bridge Rectifier V2
• Half Bridge Rectifier
• Rc Charge
• Rlc Series

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Implemented in C++ class SimCompElecCapacitor (components/electrical/sim_comp_elec_capacitor/sim_comp_elec_capacitor.h).