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Parameters Tab
| Name | Description | Unit |
|---|---|---|
Nominal Operating Voltage (Vrms LL) | The nominal inverter output line to line RMS voltage | V |
Nominal DC-Link Voltage | The nominal value of DC-link voltage | V |
Nominal Frequency | System frequency | Hz |
Rated Apparent Power | Inverter nominal three-phase apparent power | VA |
Rated Active Power | Inverter nominal three-phase apparent power | W |
Grid Support Functions Voltage Reference | Choose between average of three-phase RMS or positive sequence | - |
Initial values [Freq, V, P, Q, Vdc] | Give the initializing value to the defined parameters | [Hz, pu, pu, pu, pu] |
Sample Time | Timestep of the signal conditioning block | s |
Filters Tab
| Name | Description | Unit |
|---|---|---|
Power Measurement Filter Time Constant | Specify the time constant for the power measurement first-order filter | s |
DC Link Voltage Measurement Filter Time Constant | Specify the time constant for the DC link voltage measurement first-order filter | s |
PLL Tab
| Name | Description | Unit |
|---|---|---|
Regulator gains [Kp,Ki, Kd] | Specify the proportional, integral, and derivative gains of the internal PID controller. Use the gains to tune the PLL response time, overshoot, and steady-state error performances | - |
Time constant for derivative action | Specify the time constant for the first-order filter of the PID derivative block | s |
Maximum rate of change of frequency | Specify the maximum positive and negative slope of the signal frequency | Hz/s |
Filter cut-off frequency for frequency measurement | Specify the second-order low-pass filter cut-off frequency | Hz |
Inputs, Outputs and Signals Available for Monitoring
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Outputs
| Name | Description | Unit |
|---|---|---|
P | Per unit positive sequence active power evaluated using positive sequence voltage and current followed by a low-pass filter | pu |
Q | Per unit positive sequence reactive power evaluated using positive sequence voltage and current followed by a low pass filter | pu |
PF | Power factor evaluation using active and reactive power | - |
Vg | Three-phase instantaneous grid voltages in per unit | pu |
Vrms | RMS value of the three-phase grid voltages in per unit | pu |
Ig | Three-phase instantaneous grid currents in per unit | pu |
Vdc_pu | Nominal DC link voltage in per unit | pu |
Vrms_avg | Average of the RMS value of three-phase grid voltages in per unit | pu |
Freq | Frequency of the three-phase grid voltage obtained from PLL | Hz |
wt | Angle varying between 0 and 2*pi, synchronized on zero crossings of the fundamental (positive-sequence) of phase A voltage | rad |
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