Power topic #9016 Paralleling Dissimilar （话题# 9016并联不同的力量）.pdfVIP

Our energy working for you.TM Power topic #9016 | Technical information from Cummins Power Generation Paralleling Dissimilar Generators: Part 2 – Compatible Alternators White Paper By Gary Olson, Director of Technical Support Paralleled alternators are compatible Voltage waveform if they can operate in parallel without harmonics having damaging or disruptive neutral The voltage waveform shape created by an currents flowing between them. The alternator when operating unloaded or driving magnitude of neutral current flow a linear load may be described in terms of its related to the dissimilarity between fundamental frequency and voltage magnitude and the magnitude of the harmonic voltages paralleled sets depends upon the and their frequencies. The description is shape of their voltage waveforms. necessary because all alternators exhibit some Depending on the generators’ level of harmonic voltage distortion, and while these distortions are very small relative to the temperature rise characteristics, distortion that can be caused by non-linear age and insulating ratings, neutral loads, they may still be significant, particularly current flow between generator sets in paralleling applications. is not necessarily damaging. Be FUNDAMENTAL 3RD-ORDER HARMONIC aware that neutral currents can also