PV Dynamic¶

Controller Overview¶

The PV Dynamic controller provides a detailed dynamic simulation model for PV inverter systems using the PVDER (Photovoltaic Distributed Energy Resource) package. Unlike the quasi-static models used by other PyDSS controllers, this controller simulates sub-cycle inverter dynamics including:

Maximum Power Point Tracking (MPPT)
Grid-connected inverter current control (GCC)
DC bus voltage regulation
Reactive power control
Low/High Voltage Ride-Through (LVRT/HVRT)
Low Frequency Ride-Through (LFRT)

This controller is intended for dynamic simulations (sub-second time steps) and requires the pvder package to be installed.

Controller Model¶

class pydss.pyControllers.Controllers.PvDynamic.PvDynamic¶

The controller accepts an extensive set of parameters organized into categories:

Power Ratings

Parameter	Type	Description
`RATED_POWER_AC_VA`	float	Rated AC power output (VA)
`RATED_POWER_DC_WATTS`	float	Rated DC power input (W)
`STEADY_STATE`	bool	Initialize in steady-state mode

PV Module Parameters

Parameter	Type	Description
`Np`	int	Number of parallel strings
`Ns`	int	Number of series modules
`Vdcmpp0`	float	Initial MPP DC voltage (V)
`Vdcmpp_max`	float	Maximum MPP DC voltage (V)
`Vdcmpp_min`	float	Minimum MPP DC voltage (V)

Inverter Ratings

Parameter	Type	Description
`Vdcrated`	float	Rated DC bus voltage (V)
`Ioverload`	float	Overload current limit (p.u.)
`Vrmsrated`	float	Rated RMS voltage (V)

Feature Flags

Parameter	Type	Description
`MPPT_ENABLE`	bool	Enable Maximum Power Point Tracking
`VOLT_VAR_ENABLE`	bool	Enable Volt-Var control
`LVRT_ENABLE`	bool	Enable Low Voltage Ride-Through
`HVRT_ENABLE`	bool	Enable High Voltage Ride-Through
`LFRT_ENABLE`	bool	Enable Low Frequency Ride-Through

Usage Example¶

["PVSystem.pv1"]
STEADY_STATE = true
RATED_POWER_AC_VA = 50000
RATED_POWER_DC_WATTS = 52500
DER_ID = "pv1"
Np = 11
Ns = 735
Vdcmpp0 = 750.0
Vdcrated = 550.0
MPPT_ENABLE = true
VOLT_VAR_ENABLE = false
LVRT_ENABLE = true
HVRT_ENABLE = true