In order to simplify the harmonic analytics of typical symmetric harmonic source,such as three-phase full-bridge rectification circuit and three-phase AC regulating circuit,a novel harmonic analytic method is presented based on time domain transforms.

Control of harmonic source from local power network of Qilu Petroleum and Chemistry Engineering Corporation Ltd;

Development of real-time harmonic source detector based on ARM and DSP;

Simulation analysis of nonlinear load harmonic source in power system;

Algorithm for calculating harmonics superposition of multi-harmonic sources in rural power grid;

Studies on analysis methods of multi-harmonic sources in AC/DC hybrid transmission system;

Harmonic sources modeling and harmonic superposition simulation of power system with multi-harmonic sources;

Analysis of electric metering of harmonic sources in Hunan province and its countermeasure;

By analyzing the characteristics of the several common load harmonic sources, this paper inducted the resistance formulas, sequence resistance and sequence impedance matrixes of tri-phase universe loads, star and triangle connection loads under harmonics condition.

The mechanism of fraction-harmonics appearance is analyzed through the example of inverter speed equipment and fluctuation load of two typical fraction-harmonic sources,and the harm of fraction-harmonics is analyzed in detail through some typical examples.