Nominal parameters of the generator

VA, Vrms, Hz

Nominal power, nominal line to line RMS voltage and nominal frequency of operation of the synchronous machine

Reactances

pu

Direct (d) axis and quadrature (q) axis reactances of the synchronous machine, leakage reactance

Time constants

s

Time constants of the direct axis and quadrature axis. Can be chosen between short-circuit or open-circuit time constants

Stator resistance

pu

Stator resistance of the synchronous machine

Mechanical parameters

pu

Inertia coefficient (or H constant), friction factor and pair of poles of the synchronous machine

Initial conditions

%, degrees, pu

Initial steady state values of speed deviation (in percent), electric angle of the rotor, phase currents (module and angle) and field voltage of the synchronous machine

Simulate saturation

-

check box to indicate if the saturation of the synchronous machine will be taken into account

no-load curve

pu

Field current and voltage values at machine terminals

Regulator gains

-

Regulator gains for the isochronous mode and following mode

Time constants Isochronous mode

s

Regulator time constants for the isochronous mode

PI regulator P following mode

-

PI regulator gains for the following mode

Actuator time constants

s

Time constants for the actuator of the governor

Torque limits

pu

Maximum and minimum torque limits

Other parameters

s, pu, %

Engine time delay, Initial value of mechanical power, Droop in percentage

Low-pass filter time constant

s

Time constant for the low-pass filter of the IEEE-DC1A excitation system

Voltage regulator parameters

s

Gain and time constant parameters for the voltage regulator of the IEEE-DC1A excitation system

Damping filter parameters

s

Gain and time constant parameters for the damping filter of the IEEE-DC1A excitation system

Transient gain reduction lead and lag time constants

s

Time constant parameters for the lead-lag stages of the IEEE-DC1A excitation system

Exciter gain and time constant

s

Gain and time constant parameters for the exciter of the IEEE-DC1A excitation system

Field voltage values

pu

Voltage values for the exciter of the IEEE-DC1A excitation system

Exciter saturation values

pu

Function values for the saturation simulation of the IEEE-DC1A excitation system

Initial values

pu

Initial conditions of terminal voltage and field voltage

Sample time

s

Time step of the simulation

Proportional and integral gains

-

PI controller gains for load control droop function

Output initial values and limits

pu

Initial condition for the output of the controller, and maximum-minimum limits

Proportional and integral gains

-

PI controller gains for load control reactive power function

Output initial values and limits

pu

Initial condition for the output of the controller, and maximum-minimum limits

Winding connection on the high side voltage of the transformer

-

Possible connection types for the high voltage windings of the transformer (Y/Yn/Yg/delta (lag or lead) )

Winding connection on the low side voltage of the transformer

-

Possible connection types for the low voltage windings of the transformer (Y/Yn/Yg/delta (lag or lead) )

Transformer core type

-

Possible core types for the transformer (three-single phase transformers/core-type/shell-type)

Simulate saturation

-

check box to indicate if the saturation of the transformer will be taken into account

Transformer parameter units

-

Choose between SI or per unit (pu) values

Nominal power

VA

Rated power of the three-phase transformer

Parameters of the high voltage side of the transformer

V, ohms or pu, H or pu

Rated voltage of the high voltage winding, resistance and inductance of the winding

Parameters of the low voltage side of the transformer

V, ohms or pu, H or pu

Rated voltage of the low voltage winding, resistance and inductance of the winding

Magnetizing resistance of the transformer

ohms or pu

Parallel resistance of the magnetization branch of the transformer

Magnetizing inductance of the transformer

H or pu

Parallel inductance of the magnetization branch of the transformer

Zero-sequence inductance L0 flux path return

H or pu

Zero-sequence inductance for the three-limb core transformer

Saturation curve

A, V.s

Excitation current and flux linkages values of the curve

Enable

-

Enable/disable the relay operation

Data voltage threshold

%

Threshold limit for the voltage

Delta angle and frequency threshold

degrees, Hz

Threshold limit for the angle and the frequency

Breaker Close time

s

Breaker Closing time

Freezing time

s

The initial time during which the breaker will remain zero i.e. the breaker will be open

Voltage check

-

Voltage check functionality enable/disable

Vmin

% of Vll

Threshold voltage below which Bus/Line considered to be dead/non-energized

Vmax

% of Vll

Threshold voltage above which Bus/Line considered to be live/energized

P ref

pu

Active power reference

Q ref

pu

Reactive power reference

V ref

pu

Voltage reference

w ref

pu

Speed reference

status

-

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

Islanded

-

0 = Disabled or 1 = Enabled

Measurements

kW, kVAr, kV, A, pu

In this port there are 5 signals to monitoring the operation of the block:

1)Power delivered by the diesel generator

2)Reactive power delivered by the diesel generator

3)Voltage RMS at the terminal of the diesel generator

4)Current RMS delivered at the terminal of the diesel generator

5)Reserve reactive power of the diesel generator

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