GE D90 Plus Instruction Manual page 435

Line distance protection system

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CHAPTER 8: AUTOMATION

LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL

Figure 353: Real and imaginary component calculation logic for remote voltage

The magnitude of the remote voltage is calculated next and assigned to virtual analog 9.

Note that virtual analog 8 is used as an intermediate value in the automation logic.

Figure 354: Remote voltage magnitude calculation logic

Now that the remote voltage magnitude has been calculated, the following logic

calculates the voltage difference between this and the setting voltage.

AUTOMATION LOGIC