【Daily Topic】【Electrical Edition 20160727】
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Participation reward: 2 Wealth. Reward for correct answer: 9 Wealth. Question: What is a harmonic?
The component of current whose frequency is an integer multiple of the fundamental frequency is referred to as a \"harmonic\"; the term originates from acoustics. For more details, you can search on Baidu
In power systems with nonlinear (time-varying or time-invariant) loads, even when the power supply operates at a frequency of 50 Hz, the application of this line frequency voltage or current to the nonlinear load results in sine waves of frequencies other than the line frequency. When these sine waves with frequencies different from the line frequency are expanded using Fourier series, they are what are known as power harmonics.
Current or voltage in the power grid with a frequency higher than 50 Hz and an integer multiple of 50 Hz
Harmonics refer to the electrical components in the current whose frequencies are integer multiples of the fundamental frequency
Harmony is a mathematical or physical concept referring to the part of a periodic function or periodic waveform that can be expressed as a linear combination of constants, sine functions, and cosine functions with the same minimum positive period as the original function.
Harmony is a mathematical or physical concept referring to the part of a periodic function or periodic waveform that can be expressed as a linear combination of constants, sine functions, and cosine functions with the same minimum positive period as the original function.
Harmonics refer to the electrical components in an electric current whose frequencies are integer multiples of the fundamental frequency; generally, they represent the components resulting from the Fourier series decomposition of periodic non-sinusoidal electrical signals, namely those currents with frequencies higher than that of the fundamental frequency
Current or voltage in the power grid with a frequency higher than 50 Hz and an integer multiple of 50 Hz
When the voltage or current waveform in the power grid is not an ideal sine wave, it means that there are voltage or current components with frequencies higher than 50 Hz; we refer to such current or voltage components with frequencies above 50 Hz as harmonics.
Harmonics refer to the electrical components in an electric current whose frequencies are integer multiples of the fundamental frequency; generally, they represent the components resulting from the Fourier series decomposition of periodic non-sinusoidal electrical signals, namely those currents with frequencies higher than that of the fundamental frequency