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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3.2. LABORATORY USE 17<br />
Then the SIMEAS R is connected <strong>to</strong> the power network model in the labora<strong>to</strong>ry. At<br />
least the plugs for the current in all three phases <strong>and</strong> the plugs for the voltage in all<br />
three phases have <strong>to</strong> be plugged in. As an option the fourth voltage input can be<br />
connected <strong>to</strong> the neutral conduc<strong>to</strong>r. There are four additional voltage inputs <strong>and</strong> some<br />
digital inputs. So it is possible <strong>to</strong> record status information from switches or distance<br />
relays.<br />
After that some failures (single phase <strong>and</strong> three-phase short circuits, earth faults) were<br />
simulated with the power network model with different neutral earthing (solidly earthed,<br />
isolated <strong>and</strong> inductive earthed system). If the parameters were set correctly, the SIMEAS<br />
R records them. With Oscop P the recordings are viewed <strong>and</strong> analyzed. In addition <strong>to</strong><br />
the SIMEAS R, the disturbances were also recorded with a digital distance relay. The<br />
recordings <strong>of</strong> these two devices were compared <strong>and</strong> analyzed.