This paper presents a new strategy for optimal placement of multi-type FACTS devices with a view to minimize losses besides enhancing the voltage profile using biogeography based optimization. The strategy places three types of FACTS devices that include static VAR compensator, thyristor controlled series compensator and unified power flow controller; and offers optimal locations for placement, type and parameters of the FACTS devices. Test results on IEEE 14, 30 and 57 bus systems reveal the superiority of the algorithm.
The paper shows a study on the relationship between noise measures and sound quality (SQ) features that
are related to annoyance caused by the traffic noise. First, a methodology to perform analyses related to
the traffic noise annoyance is described including references to parameters of the assessment of road noise
sources. Next, the measurement setup, location and results are presented along with the derived sound quality
features. Then, statistical analyses are performed to compare the measurement results and sound quality
features. The included conclusions are focused on showing that the obtained loudness values, regardless of
the used system, are similar in a statistical sense. Contrarily, sharpness, roughness and fluctuation strength
values differ for the tools employed.