pvd1 model debug

[J-K-Peng]

PVD1 is designed to only support down regulation frequency droop. Please set the upper frequency deadband to 999 to effectively disable up regulation frequency droop.

[cuihantao]

The standard model has a upper limit of zero. See https://www.powerworld.com/WebHelp/Content/TransientModels_HTML/Machine%20Model%20PVD1.htm

To maintain compatibility, can you make the upper limit a parameter and default to zero?

[J-K-Peng]

The standard model has a upper limit of zero. See https://www.powerworld.com/WebHelp/Content/TransientModels_HTML/Machine%20Model%20PVD1.htm

To maintain compatibility, can you make the upper limit a parameter and default to zero?

The standard model indicates that the deadband should only output a frequency deviation when it is less than the lower deadband limit 'fdbd' (a non positive value). For any frequency deviation greater than 'fdbd', the output should be zero. This implies that the upper deadband is effectively set to positive infinity (i.e. 999).

[cuihantao]

You are right. Thanks!