3.1.15 Per-Phase Creep Threshold for Reactive Energy
If the per-phase reactive power (fundamental plus harmonics) is less than the creep threshold, then the corresponding accumulators (Q_x, Q_x_F) are reset to zero. This rule is applied to every single cycle.
This creep affects the power accumulators, the pulse accumulators and measurements. However, the generic creep power threshold (POWER_OFFSET_Q) affects only the pulse accumulators and measurements.
The CREEP_THRESHOLD_Q_x is stored in the uQ12.20 format and the unit is mVArs-scaled (normalized by K_I_x and K_V_x).
If the creep reactive power for phase A is set to 5 VAr, K_I_A = 547, and K_V_A = 1651, then CREEP_THRESHOLD_Q_A = round [5000 / (K_IA * K_VA) * 220] = 5805 = 0x000016AD.
| Name: | CREEP_THRESHOLD_Q_x (x = A, B, C) |
| Property: | Read-Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| CREEP_THRESHOLD_Q_x[31:24] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| CREEP_THRESHOLD_Q_x[23:16] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| CREEP_THRESHOLD_Q_x[15:8] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| CREEP_THRESHOLD_Q_x[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |