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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

Name

Description

Unit

Sample Time (s)

Computational time step

s

Over-Voltage Range

Name

Description

Unit

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

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

Name

Description

Unit

Vpu

Grid voltage at the point of coupling

pu

Outputs

Name

Description

Unit

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.

Intellectual Property Disclaimer

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