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Voltage Protection (Three-phase)
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This block is used to detect abnormal conditions in the grid’s voltage. For this purpose, a set of regions can be specified by the user as specified in [1]. A maximum of 8 different regions can be specified for over and under voltage events, respectively. Also, this block can identify the power injection mode in each of the regions (mandatory operation, momentary cessation, or cease to energize). This power injection mode is defined in the Voltage Ride-Through (VRT) Mode output.
Mask and Parameters
Configuration Tab
Name | Description | Unit |
|---|---|---|
Sample Time (s) | Computational time step | s |
Over-Voltage Range
Name | Description | Unit |
|---|---|---|
Number of Over-Voltage Points | Number of over-voltage regions delimited by a set of voltage points | - |
Voltage Points [Point1,…, Point 8] | Low-limit voltage values before reaching the respective over-voltage trip region | pu |
Time Points [Point1,…, Point 8] | Amount of time that the converter must operate in a voltage region before tripping | s |
Operating Mode | Specifies the power injection mode in the VRT Mode output. 1: Mandatory Operation, 2: Momentary Operation, 3: Cease to Energize | - |
Under-Voltage Range
Name | Description | Unit |
|---|---|---|
Number of Over-Voltage Points | Number of over-voltage regions delimited by a set of voltage points | - |
Voltage Points (pu) [Point1,…, Point 8] | Low-limit voltage values before reaching the respective over-voltage trip region | pu |
Time Points [Point1,…, Point 8] | Amount of time that the converter must operate in a voltage region before tripping | s |
Operating Mode | Specifies the power injection mode in the VRT Mode output. 1: Mandatory Operation, 2: Momentary Operation, 3: Cease to Energize | - |
Inputs, Outputs, and Signals Available for Monitoring
Inputs
Name | Description | Unit |
|---|---|---|
Vpu | Grid voltage at the point of coupling | pu |
Outputs
Name | Description | Unit |
|---|---|---|
U/O V Trip | Trip signal for under or over-voltage events | - |
VRT mode | Voltage ride-through mode signal (1: Mandatory Operation, 2: Momentary Cessation, 3: Cease to Energize) | - |
References
[1] IEEE, "IEEE Standard for Interconnection and Interoperability of Distributed Energy Resources with Associated Electric Power Systems Interfaces," IEEE Std 1547-2018 (Revision of IEEE Std 1547-2003), no. doi: 10.1109/IEEESTD.2018.8332112, pp. 1-138, 2018.
[2] IEEE, "IEEE Standard Conformance Test Procedures for Equipment Interconnecting Distributed Energy Resources with Electric Power Systems and Associated Interfaces," IEEE Std 1547.1-2020, pp. 1-282, 2020.
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