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The Diesel Generator is composed of a round rotor synchronous machine, a speed governor, a synchronism relay and the excitation and load control.
Mask and Parameters
The Diesel Generator block contains the following tabs in the parameter configuration mask:
Generator
Governor
Excitation System (IEEE-DC1A)
Controllers
Exciter and Rectifier
Initial Values
Load Controller
Synchronism check
Generator Tab
Name | Unit | Description |
|---|---|---|
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 |
Governor Tab
Name | Unit | Description |
|---|---|---|
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 |
Excitation System (IEEE-DC1A) Tab
Name | Unit | Description |
|---|---|---|
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 |
Name | Unit | Description |
|---|---|---|
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 |
Name | Unit | Description |
|---|---|---|
Initial values | pu | Initial conditions of terminal voltage and field voltage |
Sample time | s | Time step of the simulation |
Load Controller Tab
Name | Unit | Description |
|---|---|---|
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 |
Name | Unit | Description |
|---|---|---|
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 |
Synchronism check Tab
Name | Unit | Description |
|---|---|---|
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 |
Inputs, Outputs and Signals Available for Monitoring
Inputs
Name | Unit | Description |
|---|---|---|
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 |
Outputs
Name | Unit | Description |
|---|---|---|
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 |