![]() In the 1950s and 1960s, the study of harmonics in power converters extended to the transmission of voltage in the electrical power system. In the 1920s and 1930s, the distortion in voltage waveforms caused by power converters was noticed and studied. Joseph Fourier (1768–1830) and other mathematicians performed basic calculations of harmonics. In the eighteenth and nineteenth century, J. ![]() The analysis and modeling of the harmonics are supported for the Fourier analysis. The harmonics are a problem when their magnitude produces an electrical power system resonance. The problems of harmonic in the electrical power systems are low, but their analysis can help to increase plant power system reliability. 519 imposed by utilities is becoming stricter due to the increase in proportion of nonlinear load. Nowadays, the recommendation from IEEE Std. Currently in the United States, only 15–20% of the utility distribution loading consists of nonlinear loads. With the growth and expansion of power electronics and proliferation of nonlinear loads in electrical power system applications, the harmonics and their effects on power quality are a topic of concern. The issues and considerations associated with electrical power systems are often misunderstood. Electrical power systems are an area that is receiving a great deal of attention recently. ![]()
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