Abstract
Aiming at enhancing reactive power compensation (RPC) capability of the traditional single-phase bridgeless rectifier, a 2.5kVA circuit topology composed of a single-phase bridgeless rectifier and a third-order tuned LC series branch in parallel connection is proposed. The corresponding control strategy using the third harmonic injection pulse width modulation (THIPWM) technique is also presented, which enables the proposed single-phase bridgeless rectifier to operate under varied power factor with the near-sinusoidal current at the point of common coupling (PCC). The principle of the proposed topology is discussed in detail and reactive power compensation capability of the proposed single-phase bridgeless rectifier under a certain amount of active power to be transmitted to the load is studied. Simulation and experiment results are given to validate the feasibility of the proposed circuit topology and the correctness of the theoretical analysis.
Highlights
Nowadays, power quality is seriously influenced by the increasing penetration of various power electronic devices connected to the grid
A number of papers have investigated the possibility of incorporating power quality functionality into unidirectional power converters, but most of them just focus on the incorporation of harmonic current compensation (HCC) functionality [6], [9]
Reference [22] gave detailed analysis to input current zero-crossing distortion of bridgeless rectifier operating under different power factors, which indicates that the total harmonic distortion (THD) of the input current is determined by both the active power transmitted to the load and the displacement angle θg
Summary
Power quality is seriously influenced by the increasing penetration of various power electronic devices connected to the grid. Reference [22] gave detailed analysis to input current zero-crossing distortion of bridgeless rectifier operating under different power factors, which indicates that the THD of the input current is determined by both the active power transmitted to the load and the displacement angle θg.
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