3.5.1 Harmonic Analysis Output Quantities
The metrology module generates the following quantities to calculate appointed m-th order harmonic current RMS: I_A_m_R, I_A_m_I, I_B_m_R, I_B_m_I, I_C_m_R, I_C_m_I, I_N_m_R, and I_N_m_I.
I_x_m_R is the real part of DFT of phase x current, x = [A, B, C, N].
I_x_m_I is imaginary part of DFT of phase x current, x = [A, B, C, N].
I_x_m_R and I_x_m_I are stored in the sQ13.18 format.
Where, m is the harmonic order number from 1 to 31.
The following formula is used to calculate the current RMS value of each phase:
Where,
- x = [A, B, C, N]
- N = The number of samples in the last measurement interval
The metrology module generates the following quantities to calculate appointed m-th order harmonic voltage RMS: V_A_m_R, V_A_m_I, V_B_m_R, V_B_m_I, V_C_m_R, and V_C_m_I.
V_x_m_R is the real part of DFT of phase x voltage, x = [A, B, C].
V_x_m_I is imaginary part of DFT of phase x voltage, x = [A, B, C].
V_x_m_R and V_x_m_I are stored in the sQ13.18 format.
Where, m is the harmonic order number from 1 to 31.
The following formula is used to calculate the voltage RMS value of each phase:
Where,
x = [A, B, C]
N = The number of samples in the last measurement interval
| Name: | I_x_m_R, I_x_m_I, V_x_m_R, V_x_m_I |
| Property: | Read |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| I_x_m_R/I_x_m_I/V_x_m_R/V_x_m_I[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 | |
| I_x_m_R/I_x_m_I/V_x_m_R/V_x_m_I[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 | |
| I_x_m_R/I_x_m_I/V_x_m_R/V_x_m_I[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 | |
| I_x_m_R/I_x_m_I/V_x_m_R/V_x_m_I[7:0] | |||||||||
| Access | R | R | R | R | R | R | R | R | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |