Abstract
Power electronics-based apparatuses absorb non-sinusoidal currents. These are considered non-linear and non-symmetrical loads for the power grid, and they generate a harmonic current. The dynamic tuning passive filter (DTPF) is one of the best solutions for improving power quality and filtering out harmonic currents to get a symmetrical current waveform. The electrical parameters of DTPF can influence its absorbing harmonic current, tuning performance, and cost. In this paper, a method for designing and optimizing the electrical parameters of dynamic tuning passive filter is proposed in order to improve the effectiveness of DTPF and the symmetry level of the power source. First, according to the characteristics of the harmonic source, the design technical indicators of DTPF, and its topology, the design procedure for the electrical parameters of DTPF is proposed. Second, based on detailed analysis of the test results, the range of the harmonic current absorption coefficient is determined. Third, the range of the relationship coefficient is determined by analyzing the impact of the filter capacitor’s capacity on the filter performance. Fourth, the calculation method for the electrical parameters of DTPF is devised. Finally, the validity of this method is verified by several engineering cases, and the electrical parameters of the filter capacitor and electromagnetic coupling reactance converter (ECRC) under the lowest total cost are simulated and optimized. Our approach can optimize the electrical parameters of DTPF and improve the harmonic suppression effectiveness, thus leading to a more symmetrical waveform and successfully avoiding power grid problems. The research results of this study not only provide a basis for the design of ECRC, but also lay a foundation for the machining DTPF.
Highlights
To date, power electronics have been extensively applied to numerous fields, such as industrial manufacturing, microgrids, transportation systems, distributed generation interfacing converters, and handheld devices
Definition: The h-th harmonic current absorption coefficient Ksh of dynamic tuning passive filter (DTPF) equals the ratio of the h-th harmonic current absorbed by DTPF (I f ) to the h-th harmonic current of the harmonic source ( Ih0 )
According to the design value of the h-th harmonic current absorbed by DTPF (ISD ), the harmonic current absorbed by DTPF (I f ) is determined; the filter capacitor’s capacity is designed, based on the relationship coefficient Ks ; Step 4: The design method of the rated parameters of electromagnetic coupling reactance converter (ECRC) is proposed
Summary
Citation: Wang, Y.; Yin, K.; Liu, H.; Yuan, Y. A Method for Designing and Optimizing the Electrical Parameters of Dynamic Tuning Passive Filter. Academic Editor: Francisco G. School of Electrical and Mechanical Engineering, Pingdingshan University, Pingdingshan 467036, China
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