Petersenova cívka s regulátorem REG-DP

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Operating Instructions for the Petersen-Coil Regulator

Vydal: EBERLE Controls GmbH

Strana 26 z 272

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2. The quantity reactive current across the faulty section, meaning detuning can calcu- lated either ‘absolute value’ ‘relative value’. This results clear indication the size the expected reactive current across the faulty section when the regulator has successfully finished the tuning process and an earth fault occurs.Page Applications We take care it. Under- compensated Coil position/A |IFehler | /A Ires Over- compensated .3. The actual value the fixed coil(s), which and how many are currently active the grid, usually difficult determine.23) In both equations, positive values stand for 'over compensation' and negative values for an 'under compensation'. The following equations1 describe these two types calculation: Detuning ] v Ipos Ires A  (1.22) Detuning % [ ] [%] *100 [ ] Ipos Ires A v Ires A   (1. Fixed coils that are installed the same compensation district not have taken into ac- count. The reactive current the same size for both large and small grids. 6.1 Advantages specifying absolute detuning The regulator adjusts the reactive current flowing across the faulty section, that always has the same size. Figure 10: The absolute value the fault current based the P-coil setting curve) Looking only the 'absolute value the current' across the faulty section, based the set coil position produces the curve displayed Figure 10: This representation also fre- quently referred the curve'. And this case, any fixed coils that are installed the grid must be considered the calculation. value zero stands for full compensation. If detuning specified percentage, the expected reactive current will depend the size the grid (Ires). even more difficult to constantly adjust the regulator the cumulative value the fixed coils