nominal power

VA

Nominal

power of the

synchronous machine

nominal line-to-line voltage

kV

Nominal line to line RMS voltage

of the synchronous machine

Frequency

Hz

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

Engine Time Delay

s

Engine time delay

Initial mechanical power

pu

Initial value of mechanical power,

Droop in percentage

%

Droop in percentage

Low-pass filter time constant [Ts(s)]

s

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

Voltage regulator

gian and time constant [Ka, Ta]

- , s

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

Voltage Regulator output limits [VRmin, VRmax]]

pu

Minimum and maximum outputs for voltage regulator of the IEEE-DC1A excitation system

Damping filter parameters [Kf, Tf]

- , s

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

Transient gain reduction lead and lag time constants [Tb, Tc]

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 gain Kp

-

Proportional gain Kpof PI controller for load control droop function

Proportional gain Ki

-

Integral gain Ki of PI controller

for load control droop function

Inital output

pu

Initial condition for the output of the controller

Output upper limit

pu

Upper limit for the output of the controller

Output lower limit

pu

Lower limit for the output of the controller

Proportional gain Kp

-

Proportional gain Kp of PI controller for load control reactive power function

Proportional gain Ki

-

Integral gain Ki of PI controller

for load control reactive power function

Inital output

pu

Initial condition for the output of the controller

Output upper limit

pu

Upper limit for the output of the controller

Output lower limit

pu

Lower limit for the output of the controller

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

V line

Phase-ground voltages (a,b,c) measured on the high voltage side of the transformer located after the breaker of the model

I line

Phase currents (a,b,c) measured on the high voltage side of the transformer located after the breaker of the model

V breaker

Phase-ground voltages (a,b,c) measured on the low voltage side of the transformer located after the breaker of the model

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