Predicting and testing the effectiveness of voltage-correctingcapacitors on two 12 kV distribution lines

摘要

Techniques for calculating the quantity and locations ofvoltage-correcting capacitors on distribution lines have been describedin many studies. Two different computer models to optimize the sizes andplacement of capacitors on two 12 kV lines were used. One line is 16 km(10 miles) long with the biggest load, up to 2000 kVA, at its end. Theother is 10.5 km (6.5 miles) long. After the capacitors were installed,loads and voltages were measured along each line while supplementingexisting loads with load banks, one rated 2944 kVA and the other 500 kW.200 HP fire pumps were started to collect transient performance. Themeasured currents and power factors were entered into the computermodels to calculate voltages along the lines. Predicted voltages were,on the average, within 0.85% of measured values