A Simple Control Algorithm for Three-Phase Shunt Active Power Filter for Reactive Power and Current Harmonic Compensation
نویسندگان
چکیده
Power quality issues are becoming a major concern of today's power system engineers. Shunt active power filter (SAPF) is one of the effective means for harmonic current compensation in electrical power system. The performance and dynamic characteristics of a three-phase SAPF with a simple control algorithm is presented and analyzed in this paper. This algorithm operates at fixed switching frequency and compensates the reactive power and the current harmonics of nonlinear loads. Reactive power compensation is achieved without sensing and computing the reactive component of the load current, thus simplifying the control implementation. Current harmonic compensation is done in time domain. The proposed controller is compared with the conventional proportional-integral (PI) controller method on compensating reactive power and harmonic currents of the load. The simulations of these two schemes are carried out in Matlab/Simulink.
منابع مشابه
ارائۀ روش کنترلی جدید برای فیلترهای اکتیو موازی در سیستمهای سهفاز چهارسیمه بهمنظور جبرانسازی هارمونیکها، نامتعادلی و توان راکتیو
In this paper, a novel control strategy for a Shunt Active Power Filter (shunt-APF) is proposed. In the proposed control strategy which is based on a new application of the instantaneous reactive power theory, the current injected by the shunt-APF is capable of compensation for the reactive component, the harmonic components and also unbalance of the load current. In this strategy, the shunt-AP...
متن کاملIndirect Control of Single-Phase Active Power Filters using Harmonic Control Arrays
The ever increase of nonlinear loads in electric distribution networks causes many problems due to the high level of harmonic currents. This paper proposes a new technique for controlling a single phase shunt active power filter based on a selective compensation using the newly developed technique of harmonic control arrays. Simulation results confirm the appropriate selective harmonic compensa...
متن کاملMitigation of Switching Harmonics in Shunt Active Power Filter Based on Variable Structure Control Approach
This paper presents a novel control approach used in shunt active power filter based on variable structure control combined with Random PWM technique (RVSC) that provides robust, fast, and more favorable performance for active power filter. This control strategy is compared with two other strategies to show the effectiveness of the introduced methods; pulse width modulated proportional-integral...
متن کاملCompensation Strategies for Shunt Active Power Filter in Single- and Three-Phase Systems: Different Formulation, Comparison and Evaluation
متن کامل
Harmonic Elimination of 25 kV AC Electric Railways Utilizing a New Hybrid Filter Structure
Thyristor rectifiers are widely used in electric railways in order to control the speed. As a consequence of their usage in addition to substantial input lead current, an enormous amount of harmonics is injected into the grid. To avoid such harmonics as well as reactive power compensation, reactive power hybrid filters consisting of active and passive filters are utilized. Regarding different p...
متن کامل