Sampling time

Simulation time-step

Nominal frequency

Fundamental network frequency

Total wind turbine nominal power

Power rating of the wind turbine

Nominal global power

Overall installed capacity of the microgrid network

Nominal electrical power

Apparent power rating of the asynchronous machine

Mutual reactance

Magnetizing reactance of the asynchronous machine

Stator | Nominal voltage

Stator line-line RMS voltage (i.e. generator terminal voltage)

Stator | Resistance

Resistance of the stator winding of the asynchronous machine

Stator | Reactance

Leakage reactance of the stator winding of the asynchronous machine

Rotor | Nominal voltage

Rotor line-line RMS voltage

Rotor | Resistance

Resistance of the rotor winding of the asynchronous machine

Rotor | Reactance

Leakage reactance of the rotor winding of the asynchronous machine

Mechanical Properties | Inertia constant

Combined rotor and load inertia constant

Mechanical Properties | Friction factor

Combined rotor and load viscous friction coefficient

Mechanical Properties | Number of pole-pairs

Number of pole pairs

Initial Conditions | Slip

Initial slip of the asynchronous machine

Initial Conditions | Electrical angle

Initial electrical angle at t = 0

Initial Conditions | Magnitude

Initial magnitude of the stator current

Initial Conditions | Angle

Initial angle of the stator current

Line filter capacitor (Q=50)

Reactive power generated by the line filter at the nominal voltage

Choke | Inductor

Reactance of the choke

Choke | Resistor

Resistance of the choke

DC Link | Capacitance per generator

Capacitance of the DC link per generator

DC Link | Nominal DC bus voltage

DC link nominal voltage

Cut-off frequency

Cut-off frequency of the low pass filter

Damping factor

Damping factor of the low pass filter

Minimum speed

Minimum angular shaft speed

Maximum speed

Maximum angular shaft speed

Proportional gain (Kp)

PI proportional gain for the torque controller

Integral gain (Ki)

PI integral gain for the torque controller

Maximum speed output

Maximum speed regulator output

Turbine inertia

Inertia of the turbine

Proportional gain (Kp)

PI proportional gain for the pitch controller

Maximum pitch angle

Maximum pitch angle of the turbine

Maximum rate of change of pitch angle

Slew rate of the change of pitch angle

Pitch time constant

Time constant of the pitch control

Proportional gain (Kp)

PI proportional gain for the pitch compensation

Integral gain (Ki)

PI integral gain for the pitch compensation

Grid-side converter maximum current

Maximum allowed DC current

DC Bus Voltage Regulator | Proportional gain (Kp)

PI proportional gain for the DC voltage regulation controller

DC Bus Voltage Regulator | Integral gain (Ki)

PI integral gain for the DC voltage regulation controller

Current Regulator | Proportional gain (Kp)

PI proportional gain for the current regulator

Current Regulator | Integral gain (Ki)

PI integral gain for the current regulator

Current Regulator | Current limit

Maximum regulator current

Maximum modulation index

Grid side maximum modulation index

Frequency of the grid-side PWM carrier

Pulse Width Modulation carrier signal frequency

Minimum flux magnitude

Minimum flux magnitude of the DFIG

Maximum d-axis rotor current

Maximum magnitude of the d-axis component of the rotor current

Reactive Power Regulator | Integral gain (Ki)

Integral gain for the reactive power controller

Reactive Power Regulator | Minimum output value

Minimum reactive power output

Reactive Power Regulator | Maximum output value

Maximum reactive power output

Voltage Regulator | Integral gain (Ki)

Integral gain for the voltage regulator controller

Current Regulator | Proportional gain (Kp)

PI proportional gain for the current regulator

Current Regulator | Integral gain (Ki)

PI integral gain for the current regulator

Current Regulator | Current limit

Maximum regulator current

Maximum modulation index

Rotorside maximum modulation index

Frequency of the rotor-side PWM carrier

Pulse Width Modulation carrier signal frequency

Nominal mechanical power output

Net mechanical power transferred to the rotor

Coefficients [c1 … c8]

Wind model equation coefficients

Rated omega r

Rated rotor (electrical) speed

Cp max

Maximum power efficiency

Lambda at Cp max

Lambda at maximum power efficiency

Nominal wind speed

Wind speed that gives maximum power efficiency

Initial wind speed

Wind speed at the start of the simulation

Wind turbine inertia constant H

Turbine inertia

Shaft spring constant refer to high-speed shaft:

Shaft spring constant as per-unit of the nominal mechanical torque

Shaft mutual damping

Shaft mutual damping as per-unit of the nominal mechanical torque

Turbine initial speed

Turbine speed as per-unit of the nominal speed at the start of the simulation

Initial output torque

Torque output as per-unit of the nominal torque at the start of the simulation

P ref

Active power reference

Q ref

Reactive power reference

Wind speed ref

Wind speed

Curtail enable

0 = Curtail mode not enabled or 1 = Curtail mode enabled

Trip

0 = Disconnected from the grid or 1 = Connected to the grid

V line

Voltage measurement at the point of common coupling

I line

Current measurement at the point of common coupling

Measurements

Several measurements are stored in this bus.

A

Connection port to phase A of the grid

B

Connection port to phase B of the grid

C

Connection port to phase C of the grid