| ??? 02/23/05 18:03 Read: times |
#88241 - 3 phase AC power line measuring center |
Hi dear friends,
I am currently working on a project for measurement and monitoring of quantities of electric power system. I am seeking for the best methods to calculate the following from the samples stored in RAM. Your recommendations will help me to choose the right way. Thanks in advance Quantities: Phase voltage L-N: U1, U2, U3, (TRUE RMS) Line voltage: U12, U23, U31, (TRUE RMS) Currents: I1, I2, I3, In, (TRUE RMS) Active Power: P1, P2, P3, Ptotal Reactive Power: Q1, Q2, Q3, Qtotal Apparent Power: S1, S2, S3, Stotal Power Factor (COSč): PF1, PF2, PF3, THD: THD (I1, I2, I3, U1, U2, U3, U12, U23, U31) Frequency The device is equipped with: - 80C552 @ 11.0592MHz - A 128x64 pixel gLCD with T6963c controller -Max691+ battery backup -OKI 6242 RTC -64k RAM AC voltages and currents (from C.T) are scaled to vary from 0 to 5.12v with +2.56v offset (5mV step). Sampling rate is 64 per AC power line period (20ms). They are sampled and stored in RAM and displayed for now. |
| Topic | Author | Date |
| 3 phase AC power line measuring center | 01/01/70 00:00 | |
| Required precision | 01/01/70 00:00 | |
| Manufacturer's App. Notes | 01/01/70 00:00 | |
| RMS Measurements | 01/01/70 00:00 | |
| Ready-made | 01/01/70 00:00 | |
| vaporware? | 01/01/70 00:00 | |
| just go down that page | 01/01/70 00:00 | |
| See ! | 01/01/70 00:00 | |
| Rich info | 01/01/70 00:00 | |
Error depends on phase angle | 01/01/70 00:00 |