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In this paper p-q theory is used as control technique for active filter which minimizes the lower order harmonics in the power system. This method improves the supply side current quality. The control strategy uses the PI controller for controlling the DC link voltage in the system. The PI controller parameters are selected generally with intuitive method of PI tuning. Iteratively it is identified...
A new approach to designing improved broadband passive harmonic filters (IBFs) for such applications as direct on-line, adjustable-speed drives is proposed, which employs genetic algorithms (GAs). The method is based on frequency domain modeling of the system. The success of the method requires accurate representation of the load harmonics. By using the proposed GAs program, it becomes possible to...
Electric arc furnace is the main equipment in ferroalloy production. They cause serious harmonic pollution, and affect the power quality seriously. In this paper, the active filter and passive filter advantages and disadvantages were analyzed, and we adopt Hybrid active power filter to achieve harmonic suppression and then improve the power quality according to the actual situation. In the design...
Distributed generation (DG) is a hot spot nowadays, at the same time the harmonic pollution can't be ignored when DG is connected with the power grid through power converters. First discuss several harmonic suppression methods have been adopted in practice, such as increasing the number of converter pulse, using pulse width modulation (PWM) converter, passive power filter (PPF), active power filter...
The objective of this paper is to propose a new approach for designing the passive filter system by using improved genetic algorithms (IGA). The new approach combined serial single-tuned filters with high-pass filter. The model can be used in two situations: (1) filter system just suppress harmonic current. (2) filter system suppress harmonic current and provide reactive power compensation at the...
Genetic algorithm (GA) is an important method of multi-objective optimization. The method is introduced that using GA optimizes PPF parameters in this thesis. Distributed generation (DG) is a hot spot nowadays, but the harmonic pollution isn't ignored when DG is connected with the power grid through power converters. First discuss several harmonic suppression methods have been adopted in practice,...
The harmonic distortion of voltage has became an important subject in power quality, especially after use of power electronic equipment and nonlinear loads. Simple method to limitation of harmonic distortion is using of passive filters. The objective of this paper is to determine the location and size of passive filters in distribution networks economically, by using genetic algorithm. With using...
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