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Hybrid power filter (HPF) is used as a low-cost solution to provide reactive power compensation in distribution systems. It can provide reactive power compensation with a very low operational voltage. Direct current tracking with hysteresis PWM is widely used for controlling the HPF. However, hysteresis PWM suffers from variable switching frequency and high current ripple. Droop control is able to...
This paper presents a novel adaptive dc-link voltage-controlled LC coupling hybrid active power filter (LC-HAPF) for reducing switching loss and switching noise under reactive power compensation. First, the mathematical relationship between LC-HAPF dc-link voltage and reactive power compensation range is deduced and presented. Based on the compensation range analysis, the required minimum dc-link...
The control of Series Active Filter (SAF) to meet IEEE 519 standard for harmonic voltage source front-end based multiple adjustable speed motor drives, is reported in this paper. The series active filter design, control, implementation and issues in the practical application for utility interface of multiple three-phase six-pulse diode rectifier with dc side capacitor fed 480V, 150kW motor drives...
In this paper a power electronic interface (PEI) that integrates up to two renewable energy sources is presented. The generation of the different distributed sources is controlled through the DC link terminal voltage and the AC terminal voltage of the voltage source converter (VSC). The renewable source can be controlled to supply electricity to the local load and export the exceeding energy to the...
This paper describes a new strategy to control a particular structure of three phase four wires LC coupled parallel hybrid power filter (APF) for harmonics cancellation. The main differential point of the studied structure consists of the connection of neutral wire to negative of DC bus in the inverter, thus avoiding the need of split capacitors at the DC bus [1]. The LC coupling and a particular...
This paper describes a new strategy to control a particular structure of three phase four wires LC coupled parallel hybrid power filters (APF) for harmonics cancellation. The main differential point of the studied structure consists of the connection of neutral wire to negative of DC bus in the inverter, thus avoiding the need of split capacitors at the DC bus. The LC coupling and a particular control...
This paper proposes a transformer-coupled series DC active power filter (DCAPF) applied to high performance magnet power supplies with large current and low ripples. In the condition of heavy magnet loads, this type of DCAPF has much better filtering performance compared with the parallel DCAPF. Firstly, the configuration of the magnet power supplies with the series DCAPF is proposed. Then a novel...
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