According to Fourier series: any periodical signal can be express as sum of simple sine/cosine waves known as harmonics. Hence, extending the PMU technique to none fundamental frequencies will provide us the complete waveform signal in the spectrum domain.
The PQZIP compression algorithm extends the synchrophasor data to none fundamental frequencies. The algorithm evaluate the real and image component of every harmonics up-to the 511th and store changes higher than TVE of 0.1%. This technique compress the data at 1000:1 compression ratio therefore, enable the recording of a continuous waveform signal at high sampling rate. A typical storage requirement for a complete waveform signal of 4 voltage and 4 current is 1GB/month. This means that no other recording device nor database is required since the waveform is the raw data for any given power parameter.
When coupled with Elspec PQSCADA Sapphire, a multi-vendors support power management software, ~5,000 power parameters at any given resolution are calculated for displaying and reporting purposes from the acquired waveform signals.