Development of a wavelet-based algorithm to detect and determine ...
Development of a wavelet-based algorithm to detect and determine ...
Development of a wavelet-based algorithm to detect and determine ...
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2.2. FUNCTIONS 5<br />
2.2.2 Power data recorder<br />
The power data recorder functionality s<strong>to</strong>res the signals continuously. The averaging<br />
time is freely configurable. The mean values are <strong>determine</strong>d from the calculated r.m.s.<br />
values (which are calculated every cycle). Different averaging times can be configured<br />
for the electrical values.<br />
The following electrical measurements are s<strong>to</strong>red <strong>and</strong> <strong>determine</strong>d by the evaluation<br />
program:<br />
• Voltage U1, U2, U3, U4<br />
• Current I1, I2, I3, I4 Note: Depending on the type <strong>of</strong> power network <strong>and</strong> connec-<br />
tion, either the phase voltages or the phase-<strong>to</strong>-ground voltages are recorded.<br />
• Active power P1, P2, P3, P4<br />
• Reactive power Q1, Q2, Q3, Q4<br />
• Power fac<strong>to</strong>r cos phi 1, 2, 3<br />
• Frequency f<br />
• Positive-sequence system<br />
• Negative-sequence system<br />
• Weighted <strong>and</strong> unweighted dis<strong>to</strong>rtion fac<strong>to</strong>r<br />
• Harmonics (max. 5 selected for an averaging time up <strong>to</strong> 10s)<br />
• Harmonics (50 for averaging times <strong>of</strong> 10s upwards)<br />
• DC signals when the DDAU is used<br />
This function allows the feeders <strong>to</strong> be continously moni<strong>to</strong>rd <strong>and</strong> an analysis <strong>of</strong> the<br />
network quality can be performed.