Circuit Breaker (with arc)
Single-pole single-position switch with a Mayr arc.
blockType: AcausalElectricPowerSystems.Switches.CircuitBreakerWithArc
|
Path in the library: |
Description
Block Circuit Breaker (with arc) It is a single-pole switch with the Mayr arc model, controlled by an external control signal . If the value is less than the threshold value, then the switch is closed. If the value is If the value is greater than or equal to the threshold value, the switch opens to form an arc during a current interruption. An external signal can repeatedly open and close the switch.
The table below shows how the external signal controls the behavior of the block.
| Condition | Block behavior |
|---|---|
< Threshold |
The switch is closed. Port 1 is connected to port 2. |
≥ Threshold |
The switch is either opening or already open. Port 1 is connected to port 2 via non-linear conduction. |
Block Circuit Breaker (with arc) requires more computing power than a block Circuit Breaker. If the accuracy of calculating the current or arc voltage is the main requirement, then use the block Circuit Breaker (with arc) and a global solver with variable pitch. Otherwise, use the block Circuit Breaker.
The equations of the Mayr arc model
The defining equations for the switch are
and
where
-
— the conductivity of the arc;
-
— internal state variable;
-
— voltage on the switch;
-
— current through the switch.
When the switch is closed:
When the switch opens or is open:
where
-
— arc time constant;
-
— output power.
Ports
Conserving
#
2
—
electrical port
electricity
Details
Non-directional electrical port.
| Program usage name |
|
#
-
—
negative port
electricity
Details
The electrical port connected to the negative terminal.
Dependencies
To use this port, set the parameter Тип порта управления value Electrical.
| Program usage name |
|
#
+
—
positive port
electricity
Details
The electrical port connected to the positive terminal.
Dependencies
To use this port, set the parameter Тип порта управления value Electrical.
| Program usage name |
|
#
1
—
electrical port
electricity
Details
Non-directional electrical port.
| Program usage name |
|
Input
#
vT
—
Control port
scalar
Details
The input port that controls the state of the switch.
Dependencies
To use this port, set the parameter Тип порта управления value Signal.
| Data types |
|
| Complex numbers support |
I don’t |
Parameters
Parameters
#
Cooling power, P —
output power
W | uW | mW | kW | MW | GW | V*A | HP_DIN
Details
Output power .
| Units |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
#
Threshold —
Threshold voltage
V | uV | mV | kV | MV
Details
The threshold voltage for the control port is vT. The unit uses a threshold voltage and a signal value at the beginning of the simulation, to determine whether the switch is initially open or closed. When the voltage rises above the threshold value, the switch opens. When the voltage at the control port drops below the threshold value, the switch closes.
| Units |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
#
Initial arc conductance, g0 —
initial conductivity of the arc
S | nS | uS | mS
Details
Conductivity between ports 1 and 2 when the switch is closed.
| Units |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
#
Arc time constant, τ —
arc time constant
s | ns | us | ms | min | hr | d
Details
The time constant for the Mayr arc.
| Units |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
Yes |
Main
#
Тип порта управления —
setting the scalar or electrical control port
Signal | Electrical
Details
Select what is used to control the state of the switch: scalar signal or the potential difference at ports + and −.
| Values |
|
| Default value |
|
| Program usage name |
|
| Evaluatable |
No |