scholarly journals A PLL Scheme for Synchronization with Grid Voltage Phasor in Active Power Filter Systems

2010 ◽  
Vol 27 (1) ◽  
pp. 134-137 ◽  
Author(s):  
Oskars Krievs ◽  
Ingars Steiks ◽  
Leonids Ribickis
Keyword(s):  
Active Power Filter ◽  
Active Power ◽  
Active Filter ◽  
Positive Sequence ◽  
Voltage Source ◽  
Grid Voltage ◽  
Active Power Filters ◽  
Voltage Source Inverters ◽  
Power Filter ◽  
Power Filters

A PLL Scheme for Synchronization with Grid Voltage Phasor in Active Power Filter SystemsVoltage source inverters connected to the grid in applications such as active power filters require synchronization with the grid voltage. Since in practice the grid voltage can be unbalanced and distorted, but the operation of the whole active filter control system is strongly dependant on precise estimation of grid voltage phase, the fundamental positive sequence phasor of the grid voltage has to be extracted. In this paper a system for smooth estimation of the position of the voltage phasor at the point of common coupling of a parallel active filter system is presented using a sinusoidal signal integrator and a simple software PLL. The performance of the proposed system is verified by simulation and experimental results. The proposed PLL scheme can also be used in other vector oriented control systems.

Power Quality Improvement of High Voltage DC Link using Modified Shunt Active Power Filter

2018 ◽  
Vol 1 (1) ◽  
pp. 54-66
Author(s):  
Rakan Khalil Antar ◽  
Basil Mohammed Saied ◽  
Rafid Ahmed Khalil
Keyword(s):  
Power Quality ◽  
High Voltage ◽  
Pulse Width Modulation ◽  
Active Power Filter ◽  
Active Power ◽  
Voltage Source ◽  
Active Power Filters ◽  
Power Filter ◽  
Power Filters ◽  
Power Quality Improvement

A new control strategy for active power filters is proposed, modeled and implemented in order to improve the power quality of a line commutated converter High voltage DC link. The ability of reactive power and harmonics reductions are generally met by using passive and active power filters. In this paper, modified active power filter with a modified harmonics pulse width modulation algorithm is used to minimize the source harmonics and force the AC supply current to be in the same phase with AC voltage source at both sending and receiving sides of a line commutated converter high voltage DC link. Therefore, it is considered as power factor corrector and harmonics eliminator with random variations in the load current. The modified harmonics pulse width modulation algorithm is applicable for active power filter based on a three-phase five-level and seven-level cascaded H-bridge voltage source inverter. Simulation results show that the suggested modified multilevel active power filters improve total harmonics distortion of both voltage and current with almost unity effective power factor at both AC sides of high voltage DC link. Therefore, modified active power filter is an effective tool for power quality improvement and preferable for line commutated converter high voltage DC link at different load conditions.

Review of Control Methods for Active Power Filters

2013 ◽  
Vol 811 ◽  
pp. 657-660 ◽  
Author(s):  
You Jie Ma ◽  
Hong De Yuan ◽  
Xue Song Zhou
Keyword(s):  
Power System ◽  
Control Strategies ◽  
Active Power Filter ◽  
Active Power ◽  
Power Electronic ◽  
Active Power Filters ◽  
Power Filter ◽  
Power Filters ◽  
Reactive Current ◽  
Contrast Analysis

With the wide application of power electronic equipments in power system, more and more harmonic are poured into the power system, which cause power pollution and make the power quality problem increasingly serious. Active power filter (APF) is an important equipment to compensate harmonic and reactive current in power system. One of the key technologies lies in the real-time and accurate control. The fundamental principles of several control strategies of compensate current were presented, and the respective merit and demerit of these control strategies were pointed out with contrast analysis in this paper. Active power filter will achieve a higher performance and a wider application with the continuous development of the control strategy.

Application of Adaptive Tabu Search Algorithm in Hybrid Power Filter and Shunt Active Power Filters

2016 ◽  
pp. 276-308
Author(s):  
Saifullah Khalid
Keyword(s):  
Reactive Power ◽  
Load Condition ◽  
Active Power Filter ◽  
Active Power ◽  
Shunt Active Power Filter ◽  
Active Power Filters ◽  
Power Filter ◽  
Power Filters ◽  
Non Linear ◽  
Non Linear Load

A novel hybrid series active power filter to eliminate harmonics and compensate reactive power is presented and analyzed. The proposed active compensation technique is based on a hybrid series active filter using ATS algorithm in the conventional Sinusoidal Fryze voltage (SFV) control technique. This chapter discusses the comparative performances of conventional Sinusoidal Fryze voltage control strategy and ATS-optimized controllers. ATS algorithm has been used to obtain the optimum value of Kp and Ki. Analysis of the hybrid series active power filter system under non-linear load condition and its impact on the performance of the controllers is evaluated. MATLAB/Simulink results and Total harmonic distortion (THD) shows the practical viability of the controller for hybrid series active power filter to provide harmonic isolation of non-linear loads and to comply with IEEE 519 recommended harmonic standards. The ATS-optimized controller has been attempted for shunt active power filter too, and its performance has also been discussed in brief.

Application of Novel Techniques in Active Power Filter

2020 ◽  
pp. 158-191
Author(s):  
Karunendra Kumar Verma ◽  
V. M. Mishra ◽  
Niraj Kumar
Keyword(s):  
Single Phase ◽  
Reactive Power ◽  
Supply Voltage ◽  
Semiconductor Devices ◽  
Active Power Filter ◽  
Active Power ◽  
Current Control ◽  
Active Power Filters ◽  
Power Filter ◽  
Power Filters

Traditionally, the major part of the electrical power is generally consumed by the non-linear loads due to frequent application of the semiconductor devices in the form of domestic and industrial loads. This results from distortion in the actual supply voltage waveform at the source end due to the interference of the multiple harmonics generated out of semiconductor devices used at load end and excessive absorption of the reactive power. The insufficiency of these compensation techniques leads to the advent of the phase multiplication techniques as well as the most reliable and economic active power filtering scheme. A deep analysis showing tedious waveforms using the ORCAD simulation package for the various kind of loads in conjunction with the single-phase active power filter shunted to the single-phase line at the load end for the two current control techniques (i.e., hysteresis band current control, triangularization of current control) has been done. The results are analyzed and tested to lead the optimistic approach for APF (active power filters).

scholarly journals Genetic and combinatorial algorithms for optimal sizing and placement of active power filters

2015 ◽  
Vol 25 (2) ◽  
pp. 269-279 ◽  
Author(s):  
Marcin Maciążek ◽  
Dariusz Grabowski ◽  
Marian Pasko
Keyword(s):  
Active Power Filter ◽  
Active Power ◽  
Electrical Networks ◽  
Limit Values ◽  
Filter Placement ◽  
Active Power Filters ◽  
Power Filter ◽  
Power Filters ◽  
Passive Filters ◽  
Hybrid Filters

Abstract The paper deals with cost effective compensator placement and sizing. It becomes one of the most important problems in contemporary electrical networks, in which voltage and current waveform distortions increase year-by-year reaching or even exceeding limit values. The suppression of distortions could be carried out by means of three types of compensators, i.e., passive filters, active power filters and hybrid filters. So far, passive filters have been more popular mainly because of economic reasons, but active and hybrid filters have some advantages which should cause their wider application in the near future. Active power filter placement and sizing could be regarded as an optimization problem. A few objective functions have been proposed for this problem. In this paper we compare solutions obtained by means of combinatorial and genetic approaches. The theoretical discussion is followed by examples of active power filter placement and sizing

The Research Status and Development Trend of Active Power Filter

2014 ◽  
Vol 494-495 ◽  
pp. 1487-1490
Author(s):  
You Jie Ma ◽  
Hong De Yuan ◽  
Xue Song Zhou
Keyword(s):  
Power Quality ◽  
Active Power Filter ◽  
Development Trend ◽  
Current Situation ◽  
Active Power ◽  
Nonlinear Loads ◽  
Active Power Filters ◽  
Power Filter ◽  
Power Filters ◽  
Key Technologies

Power quality is getting worse with the extensive application of nonlinear loads, and active power filter technology is the effective way to settle the problem. This paper introduces the basic theory and the sorts of active power filters at first. Then the key technologies of active power filter are discussed in detail. Finally, based on some problems about current situation of active power filters, the directions of its development are analyzed in this paper.

scholarly journals Conductance-controlled global-compensation-type shunt active power filter

2015 ◽  
Vol 64 (2) ◽  
pp. 259-275 ◽  
Author(s):  
Andrzej Szromba
Keyword(s):  
Control Method ◽  
Current Source ◽  
Active Power Filter ◽  
Active Power ◽  
Active Filter ◽  
Active Filters ◽  
Voltage Source ◽  
Shunt Active Power Filter ◽  
Dc System ◽  
Power Filter

Abstract This paper presents a load equivalent conductance based control method for a shunt active power filter. The principle of energy balance in the circuit, which means between supplying source - active filter - load, is used to obtain the control formula. The natural inertia of the active filter action is exploited, so no PI regulators are needed. The active filter can compensate for non-active current and, additionally, can stabilise the supplying source active power. In a case of generating loads energy harvesting is possible. The presented method is useful as well for voltage-source as current-source inverter based active filters, and for DC system as well as for AC single- or three-phase one.

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