Edit on GitHub

FrequencyEstimator

FixedFrequency

PowerSystems.FixedFrequency — Type
mutable struct FixedFrequency <: FrequencyEstimator
    frequency::Float64
    ext::Dict{String, Any}
    states::Vector{Symbol}
    n_states::Int
end

Parameters of a Fixed Frequency Estimator (i.e. no PLL).

Arguments

  • frequency::Float64: Reference used
  • ext::Dict{String, Any}
  • states::Vector{Symbol}: FixedFrequency has no states
  • n_states::Int: FixedFrequency has no states
source

KauraPLL

PowerSystems.KauraPLL — Type
mutable struct KauraPLL <: FrequencyEstimator
    ω_lp::Float64
    kp_pll::Float64
    ki_pll::Float64
    ext::Dict{String, Any}
    states::Vector{Symbol}
    n_states::Int
end

Parameters of a Phase-Locked Loop (PLL) based on Kaura, Vikram, and Vladimir Blasko. "Operation of a phase locked loop system under distorted utility conditions." IEEE Transactions on Industry applications 33.1 (1997): 58-63.

Arguments

  • ω_lp::Float64: PLL low-pass filter frequency (rad/sec), validation range: (0, nothing)
  • kp_pll::Float64: PLL proportional gain, validation range: (0, nothing)
  • ki_pll::Float64: PLL integral gain, validation range: (0, nothing)
  • ext::Dict{String, Any}
  • states::Vector{Symbol}: The states of the KauraPLL model are:
vd_pll: d-axis of the measured voltage in the PLL synchronous reference frame (SRF),
vq_pll: q-axis of the measured voltage in the PLL SRF,
ε_pll: Integrator state of the PI controller,
θ_pll: Phase angle displacement in the PLL SRF
  • n_states::Int: KauraPLL has 4 states
source

ReducedOrderPLL

PowerSystems.ReducedOrderPLL — Type
mutable struct ReducedOrderPLL <: FrequencyEstimator
    ω_lp::Float64
    kp_pll::Float64
    ki_pll::Float64
    ext::Dict{String, Any}
    states::Vector{Symbol}
    n_states::Int
end

Parameters of a Phase-Locked Loop (PLL) based on Purba, Dhople, Jafarpour, Bullo and Johnson. "Reduced-order Structure-preserving Model for Parallel-connected Three-phase Grid-tied Inverters." 2017 IEEE 18th Workshop on Control and Modeling for Power Electronics (COMPEL): 1-7.

Arguments

  • ω_lp::Float64: PLL low-pass filter frequency (rad/sec), validation range: (0, nothing)
  • kp_pll::Float64: PLL proportional gain, validation range: (0, nothing)
  • ki_pll::Float64: PLL integral gain, validation range: (0, nothing)
  • ext::Dict{String, Any}
  • states::Vector{Symbol}: The states of the ReducedOrderPLL model are:
vq_pll: q-axis of the measured voltage in the PLL synchronous reference frame (SRF),
ε_pll: Integrator state of the PI controller,
θ_pll: Phase angle displacement in the PLL SRF
  • n_states::Int: ReducedOrderPLL has 3 states
source