Power Filter For Harmonic Compensation Research Articles

Hybrid Series Active Power Filter for Harmonic Compensation Using PI Controller Tuned with WOA Technique

Hybrid Series Active Power Filter for Harmonic Compensation Using PI Controller Tuned with WOA Technique

Battery energy integrated active power filter for harmonic compensation and active power injection

Power quality is the issue that troubles the entire power system. Increased use of modern load devices and other factors like power system parameters reduce the quality of power. Active power filter (APF) is a FACTS device used to reduce the effect of load current harmonics and improve power quality in the power system. Battery Energy source integrated APF injects active power to the system and can reduce the burden on the main source. Active power management is Battery energy integrated APF made it feasible to control and manage the flowing of power interchange between APF and point of common coupling (PCC). Excess main power from the source can be used to charge the Battery and deficit power from the main source can be fed to inject active power to PCC. This paper exhibits the harmonic compensation in the power system in conjunction with energy storage battery systems. Battery charging and discharging conditions are illustrated with battery integrated APF. Synchronous Reference Frame theory is employed to sense and control the harmonics through APF. The analysis is presented and the model is developed using MATLAB/SIMULINK software. The results obtained demonstrate a good and satisfactory response to mitigate the harmonics in the system. The total harmonic distortion (THD) for the system has been reduced to 4.10 %, 3.62 % 3.06 % and 2.33 % in the simulation study with and without Battery respectively.

Three Phase Grid Connected PV System for Mitigation of Voltage and Current Harmonics Compensation Using SRF Method

Power quality is an all-encompassing concept for a multitude of individual types of power system disturbances. The presence of harmonics in power supply network poses a severe power quality problem that results in greater power losses in the distribution system, interference problems in communication systems and, sometimes, in operation failures of electronic equipment. This paper presents a three -phase active power filter for harmonic compensation which is consists of a series active power filter and a shunt active filter. The active filter connected in series to a source acts as a harmonic isolator between the sources and loads whereas the shunt active filter is connected in parallel with a load and suppresses the harmonic current produced by the load and. reduce the total harmonic distortion (THD). The voltage source inverter (VSI) is the core of an active power filter. The hysteresis current control is a method of controlling the VSI. Hysteresis control can be either of fixed band type or adaptive band type. In this paper, Synchronous Reference Frame (SRF) theory is implemented for the generation of reference current signals for the controller. Mat lab /Simulink and are used for simulation. From the simulation results it is confirmed that the filter topology is capable of compensating the load current and voltage harmonic distortion within the stipulated limits laid down by the IEEE 519 standard.

Modelling and Analysis of Controller for Three-Phase Shunt Active Power Filter

Now a days, because of enhancement in high speed computing elements, high voltage controlled semi-conductor devices and emergence of new power circuit topologies, the Voltage Source Converter (VSC) based Active Power Filter (APF) is finding applications for compensating harmonic currents drawn by the various loads. As the active filter consists of semi-conductor devices alone, the response time of this device is very fast and it doesn’t suffer from resonance and other stability problems as faced by the normal passive filters. The Active filters are generally used at harmonic producing loads. Among all APF’s the Shunt Active Power Filter (SAPF) is more prominent at medium/high voltage applications, and also it provides higher efficiency. SAPF in the power circuit can be used either by using the voltage-sourced PWM converter equipped with a DC capacitor or a current-sourced PWM converter equipped with a DC inductor. This paper presents an approach to determine reference compensation currents of the three-phase SAPF under distorted and/or unbalanced source voltages in steady state. It is planned to design a Synchronous Reference Frame (SRF) controller for Voltage Source Converter (VSC) based Shunt active power filter for harmonic compensation. The simulation results have been obtained by using MATLAB/ SIMULINK.

Fuzzy Logic Controlled Shunt Active Power Filter for Harmonic Compensation and Power Quality Improvement

In this paper, a shunt active power filter based on fuzzy logic controller is modeled, simulated, and tested. The fundament of Instantaneous Reactive Power Algorithm is used for extracting compensated reference harmonic current. A fuzzy logic controlled shunt Active Power Filter (SAPF) Using Hysteresis Band Current (HBC) is applied to regulate the DC capacitor voltage of (SAPF) in order to improve the active filter dynamic, to ensure sinusoidal source currents and to produce a high power quality. The main goal of the proposed active filtering system is to maintain the THD well within IEEE-519 on harmonics levels. Simulation results through MATLAB/Simulink are presented and interpreted. It is demonstrated that the fuzzy logic controller improves the performance of the active power filter. The implementation of a shunt active power filter has high performance characteristics by using dSPACE system.

Digital Non-linear Controller-based Active Power Filter for Harmonic Compensation

This paper presents a design and implementation of digital non-linear controller-based, three-phase shunt-active filter for power line conditioner system. The active power filter is implemented with PWM-Voltage Source Inverter and its switching pulses are generated from Space Vector Modulation techniques. The active filter is applied for power quality improvements by compensating harmonics in the distribution network due to non-linear loads. The harmonic components are extracted from the sensed load currents from proposed non-linear control strategy. A simple and efficient Phase Locked Loop is used to synchronize the angle of vector orientation, which cancels the effect of harmonics and notches in the distribution network. An inner and outer loop Pl-control is incorporated with non-linear method for harmonic current control and dc-bus voltage regulator. Additionally, pre-filter is inserted at the input of each current loop in order to compensate for the effect of the left hand zero in the closed loop transfer functions. The entire control method is validated through MATLAB and also coded in assembly language for digital hardware implementation. The digital control algorithm is evaluated through TMS320F240 Digital Signal Processor for 10 kVAR active filter system.

Digital non-linear controller-based active power filter for harmonic compensation

AbstractThis paper presents a design and implementation of digital non-linear controller-based, three-phase shunt-active filter for power line conditioner system. The active power filter is implemented with PWM-Voltage Source Inverter and its switching pulses are generated from Space Vector Modulation techniques. The active filter is applied for power quality improvements by compensating harmonics in the distribution network due to non-linear loads. The harmonic components are extracted from the sensed load currents from proposed non-linear control strategy. A simple and efficient Phase Locked Loop is used to synchronize the angle of vector orientation, which cancels the effect of harmonics and notches in the distribution network. An inner and outer loop Pl-control is incorporated with non-linear method for harmonic current control and dc-bus voltage regulator. Additionally, pre-filter is inserted at the input of each current loop in order to compensate for the effect of the left hand zero in the closed l...

95/00485 The electromagnetic transients program (EMTP) as an effective tool to evaluate active power filters for harmonic compensation

95/00485 The electromagnetic transients program (EMTP) as an effective tool to evaluate active power filters for harmonic compensation

The Electromagnetic Transients Program (EMTP) as an effective tool to evaluate active power filters for harmonic compensation

The Institute of Electrical and Electronic Engineers (IEEE) ‘Recommended Practices and Requirements for Harmonic Control in Electric Power Systems’ sets limits for the current and voltage harmonic distortions at the point of common coupling in order to maintain an acceptable quality of electric power in the presence of nonlinear loads. Both the utility and its customers share a common responsibility since enforcement of the above practice by the utility would require that the affected customer use a suitable harmonic mitigating method. To this effect, this paper demonstrates how the Electromagnetic Transients Program (EMTP) may be used to investigate two harmonic mitigating methods, namely, the use of shunt passive power filters and the combination of a series active (APF) and shunt passive (PPF) power filters. Both methods reduce the harmonic currents injected into the distribution system; however, the combination of the series APF and shunt PPFs has a better compensation characteristic with a higher capital cost than only shunt PPFs. Before a final decision is reached, the cost of the higher harmonic losses throughout the distribution system when using only shunt PPFs must be taken into account.

The p‐q theory in three‐phase systems under non‐sinusoidal conditions

AbstractThe conventional theory of active and reactive power in single‐phase or three‐phase systems is based on an average value concept, thus making it impossible to define instantaneous active and reactive power in a real sense. On the basis of an instantaneous value concept, the authors have already proposed a new definition of instantaneous active and reactive power in three‐phase circuits for arbitrary voltage and current waveforms without any restriction. This is called the instantaneous reactive power theory or the p‐q theory, which is considered a basic theory of active power line conditioners such as reactive power compensators and active power filters for harmonic compensation.