Robust Control Based On Sliding Mode of the Shunt Active Filter to Compensate For the Disturbing Currents in the Electric Power (original) (raw)
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Matlab Simulation of Sliding Mode Control of Shunt Active Filter for Power Quality Improvement
2000
The shunt active filter has proved to be a useful device to harmonic currents and to compensate reactive power for linear/nonlinear loads. This paper presents a simulation of Sliding mode control of three-phase shunt active power filter to improve the power quality using Matlab Power system blockset. After compensation, the source current is sinusoidal under ideal and non-ideal mains voltage
A Review on Shunt Active Power Filter Control Strategies
International Journal of Engineering & Technology, 2018
Shunt active power filter (SAPF) has now become a well-known sophisticated technology to overcome current harmonics and reactive power compensation issues. In this paper a technical review of various control strategies for operation of SAPF has been presented. Control strategies such as reference current generation by time domain, frequency domain and soft computing approaches; voltage control for dc link voltage regulation and current control for generating switching patterns for voltage source inverter has been discussed. This paper aims to provide a broad understanding on SAPFs for various research and engineering applications.
2015
This paper presents a new and efficient control algorithm which adopted the voltage source inverter to decrease current harmonics generated by the nonlinear load. The sliding mode control (SMC) is employed with the current control loop to achieve fast dynamics control and a simple proportional-integral (PI) controller is adopted in the outer voltage control loop to achieve slow dynamics control. The proposed scheme implements simplified control algorithms depending on the direct current control (DCC) and indirect current control (ICC) techniques for designing trajectories in sliding mode control based shunt active power filter (SAPF). The performances of the DCC and ICC techniques were verified through a simulation with MATLAB-SIMULINK and real-time implementation in Opal RT- Lab. A comparison has been made between the two configurations showing their topological contrasts and load compensation capabilities under ideal, unbalanced and distorted source voltage conditions.
International Journal of Industrial Electronics, Control and Optimization (IECO), 2024
Active power filters (APFs) play a vital role in reducing the current harmonics and improving power quality. This work studies a shunt APF (SAPF) based on the three-phase voltage source converter (VSC). This paper investigates the new robust control approach using error dynamics. Stable first-order error dynamics are considered when designing the control inputs. Three control inputs are obtained to control the currents at any phase by choosing and optimizing the appropriate parameters. This strategy is also simple to implement in practical applications because it is the same as the proportional-derivative controller design. In addition, the new control method can be utilized for any system with low dynamic information so that the destructive effects of lumped uncertainties in the output channels of the SAPF can be alleviated. The minimum voltage and current measurements are used to control the SAPF, and the grid current harmonics will be reduced by achieving the stabilization of tracking error dynamics. Some numerical simulations are performed by MATLAB software to confirm the proposed method.
Comparative Study between Different Control Strategies for Shunt Active Power Filter
2013
Power filters are widely used in modern electrical distribution system to eliminate the harmonics associated with it. The active power filter (APF) is one of power filters which have better dynamic performance. The APF needs an accurate control algorithm that provides robust performance under source and load unbalances. The control methods are responsible for generating the reference currents which used to trigger the Voltage Source Inverters (VSI). Thus , the performance of compensation of harmonics of source current largely depend on the algorithm adopted .This paper presents a comparative study of three different control schemes to eliminate odd harmonics present in the source current. The studied system is modeled and simulated in MATLAB-Simulink environment for effectiveness of the study.
International Journal of Technical Research & Science
The most powerful solution to current harmonics is a shunt active power filter (SAPF). Because of its simple implementation features, the Synchronous Reference Frame (SRF) concept has been commonly used in current harmonics extraction algorithms in its controller. The traditional SRF algorithm, on the other hand, has a significant time delay due to its heavy dependency on slow numerical filters. Furthermore, the algorithm is still thought to have unnecessary features that place an undue computational burden on the controller. Active control filters are commonly used in the power system to reduce harmonics induced by nonlinear loads. The Shunt Active Power Filter (SAPF) injects a suitable compensating current at a line point known as the point of common coupling (PCC) to cancel out the line's harmonics and restore the sinusoidal existence of voltage and current waveforms. As an active filter, a three-phase current-controlled voltage source inverter (VSI) with a DC connection capa...
Performance Measure of Shunt Active Power Filter Applied with Intelligent Control Technique
Journal of Power of Technologies, 2020
This paper describes a shunt active power filter for compensating harmonic currents and reactive power. The shunt active power filter(SAPF) was implemented with a phase pulse modulated current control voltage source inverter. The proposed system is based on PLL synchronization with reduced fuzzy logic controller (RD-FLC). These control techniques for SAPF prove that source current is sinusoidal even when load is non linear. The CC-VSI inverter switching is done according to gating pulse obtained from the hysteresis controller using RD-FLC controller. The proposed system is investigated using simulation results. The effectiveness of the controller is observed in the form of total harmonic distortion, reactive power compensation and settling time of dc link voltage under non linear load condition. This technology reduced the rules of fuzzy logic controller from 49 to 37.