DIFF Protection Relay, Electrical Power Systems

Would you like to know about the settings and calculations of the transformer differential protection relays on electrical power systems? Would you like to plot the stability characteristic of transformer differential protection relays?

This app is an essential tool for electrical power systems engineers especially substation protection and control engineers. It is about the transformer differential protection relays on electrical power systems and transformer short circuit current calculations on electrical power systems.

Features :

* Plotting the differential relay stability characteristic

* Transformer short circuit current calculations - Earth fault and Phase-phase fault calculations

* Calculating I(diff) and I(bias) of the transformer differential protection relays

* Calculating the total impedance of the transformer for each side

* Plotting phase vector diagrams for each side

* Calculating the zero sequence compensation for the differential protection relays

* Saving and loading the relay settings

* Examples

In this app, enter the transformer information like MVA, transformer ratio, vector group and short circuit impedance of transformer, and the app calculates the short circuit currents of high voltage side and low voltage side.

You also can enter the setting of the transformer differential protection relay, and the app plots the stability characteristic of the transformer differential protection relay.

In the next step you can apply the type of fault, single-phase and two-phase and three-phase faults in the In Zone and Out Zone areas on the primary or secondary side of the transformer and you get the faults currents in each phase for each side of the transformer.

Also, the passing currents from primary and secondary side CTs can be calculated.

This app calculates the secondary currents of CTs and matching CTs for calculations of Idiff and Ibias for each phase, and the trip points are plotted on the stability characteristic of the differential relay, and you can easily see the performance of the transformer differential protection relay.

This app calculates the zero sequence compensation in two ways, by the tertiary winding or measuring neutral current.

Transformer differential protection relays app is continuously under development, with more features yet to come. Any feedback and bug-reports are greatly appreciated. Please email the suggestions and bugs of this app. Support this app by downloading it. Thank you.

If you liked this app, please rate and comment it on Google Play. Your feedback is important to me. Thank you.

Transformer differential protection relays app for electrical power systems engineering and substation protection & control engineering.

Rain App Development Company

E-mail : [email protected]

FARHAD AGHAJANIAN