3.4.4 Per-Cycle Accumulated Active Power Quantities
The metrology module generates the following accumulated active power (P) quantities: CYCLE_P_A, CYCLE_P_B, CYCLE_P_C, CYCLE_P_A_F, CYCLE_P_B_F, CYCLE_P_C_F, CYCLE_P_N, CYCLE_P_N_F.
They are in units of [W-samp scaled]. They are scaled accumulated active power quantities in the last line cycle measurement period. They are calculated according to the following formulas:
Where,
- V_x_samplei is ith sampled phase voltage value of phase x in present cycle
- V_avc_samplei is ith sampled phase voltage value of the active voltage channel (according to STATE_FLAG.TIMING_Vx) in present cycle
- I_x_samplei is ith sampled phase current value of phase x in present cycle
- N = The number of samples in the last cycle
They are used to calculate the active power. In the case of the neutral channel, it is useful for calculating the angle of the neutral current.
The CYCLE_P_x and CYCLE_P_x_F are stored in the sQ23.40 format.
| Name: | CYCLE_P_A, CYCLE_P_B, CYCLE_P_C, CYCLE_P_A_F, CYCLE_P_B_F, CYCLE_P_C_F, CYCLE_P_N, CYCLE_P_N_F |
| Property: | Read |
| Bit | 63 | 62 | 61 | 60 | 59 | 58 | 57 | 56 | |
| CYCLE_P_x/CYCLE_P_x_F[63:56] | |||||||||
| Access | R | R | R | R | R | R | R | R | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 55 | 54 | 53 | 52 | 51 | 50 | 49 | 48 | |
| CYCLE_P_x/CYCLE_P_x_F[55:48] | |||||||||
| Access | R | R | R | R | R | R | R | R | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 47 | 46 | 45 | 44 | 43 | 42 | 41 | 40 | |
| CYCLE_P_x/CYCLE_P_x_F[47:40] | |||||||||
| Access | R | R | R | R | R | R | R | R | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 39 | 38 | 37 | 36 | 35 | 34 | 33 | 32 | |
| CYCLE_P_x/CYCLE_P_x_F[39:32] | |||||||||
| Access | R | R | R | R | R | R | R | R | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| CYCLE_P_x/CYCLE_P_x_F[31:24] | |||||||||
| Access | R | R | R | R | R | R | R | R | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| CYCLE_P_x/CYCLE_P_x_F[23:16] | |||||||||
| Access | R | R | R | R | R | R | R | R | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| CYCLE_P_x/CYCLE_P_x_F[15:8] | |||||||||
| Access | R | R | R | R | R | R | R | R | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| CYCLE_P_x/CYCLE_P_x_F[7:0] | |||||||||
| Access | R | R | R | R | R | R | R | R | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |