Abstract
Along with massive applications of power electronic equipment and non-linear loads, harmonic pollutions are becoming more serious than ever. This paper describes a novel electromagnetic coupling reactor based passive power filter with dynamic tuning to quickly eliminate harmony. Firstly, the structure and mathematic model of electromagnetic coupling reactor are presented; secondly, the employed parameters, including electromagnetic coupling reactance converter, primary winding coil, and secondary winding coil are designed based on a stable structure of data; then, the test plat of passive dynamic tunable filter is introduced, as well as the performance test. According to the experimental results, the newly designed electromagnetic coupling reactor can effectively eliminate the harmonies generated by the nonlinear load, greatly reducing the harm caused by harmonics on the grid. By fine-tuning the electromagnetic coupling reactor, the dissonance caused by the change of capacitance and other issues can be effectively solved. Finally, the detailed discussion of this paper is presented, and challenges and new future research are discussed.
Highlights
With more and more non-linear devices such as direct current (DC) motors, DC power supplies, variable-frequency governors, rectifying installations, etc. used in the power grid, the level of harmonics increases, requiring stricter controls on power quality [1,2]
This article presents a new setup in order to use the passive power filter with dynamic tunable for the harmonic filtering task
By using the passive dynamic tunable filter, the performance of electromagnetic coupling reactor in the presence of non-linear filtering is analyzed, with a prototype of passive dynamic tuning filter used to carry out on-site experimental research on the distribution room of Jiangnan
Summary
With more and more non-linear devices such as direct current (DC) motors, DC power supplies, variable-frequency governors, rectifying installations, etc. used in the power grid, the level of harmonics increases, requiring stricter controls on power quality [1,2]. Though PF has the advantages of simple structure, high capacity, low cost, and stable performance, its disadvantages are obvious, and its energy-storage element is large in bulk It may produce a series of resonances and parallel resonances within the power grid. APF can dynamically filter harmonics, but can automatically track and compensate the varying harmonic currents in power grid. It has a high controllability and response. HAPF can effectively compensate reactive power loss, as well as load harmonic current based on the advantages of both APF and PPF. The proposed tunable filter can automatically track and compensate the varying harmonic currents in power grid, with the harmonics filtered out rapidly in real time.
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