Power factor corrector with a high-order harmonics filtering function

Vladimir Burlaka,Sergey Gulakov,A Ronzhin,V Shishlakov

doi:10.1051/matecconf/201711301005

Vladimir Burlaka, Sergey Gulakov + Show 2 more

Open Access

https://doi.org/10.1051/matecconf/201711301005

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Abstract

The article presents an original method and a control system of the active power factor corrector (PFC), which allows integrating the function of a parallel active filter of high-order harmonics into it. This makes it possible to reduce the total harmonic distortion of the grid voltage at the point of connection of the PFC with the proposed control system, thereby improving the working conditions of other electrical equipment in this grid. The presented control method is applicable to all PFC topologies employing direct control of the input currents.

Highlights

The adverse effects of harmonics on electrical power systems are well known [1, 2]
The power factor corrector (PFC) does not have an active influence on the mains voltage spectrum
The authors proposed the PFC [12] with a control system which allows for integration of parallel active power filters (APF) functions into it while ensuring regulation of the PFC output voltage, working with a positive input instantaneous active power, and limitation of the PFC input current

Summary

Introduction

The adverse effects of harmonics on electrical power systems are well known [1, 2]. Harmonics current generated by any non-linear load flows from the load into the power system. Introduction of modern electromagnetic compatibility standards that limit harmonic currents emission (IEC 61000-3-2, IEC 61000-3-4, IEC 61000-312) determines the intensive development of technical means that prevent deterioration of the power quality due to the presence of harmonics These means are passive harmonic filters, harmonic mitigating transformers, active power filters [3,4,5], power quality conditioners [6, 7], unified [8] and interline [9] power flow controllers. There is a small number of PFC (for example, based on the M81012FP control chip from Mitsubishi) [10], behaving as sources of the sinusoidal current with fundamental frequency (Fig. 2b) In both cases, the PFC does not have an active influence on the mains voltage spectrum (and in the case shown, the voltage total harmonic distortion THDU may even increase due to a voltage fundamental amplitude decrease). The need for current sensors can be eliminated by operating the parallel APF inverter in a voltage source mode, as shown in [11]

Proposed PFC control strategy

Simulation

Experiments

Conclusion

Findings

10. DIP-PFC Application Note