Three-level (NPC) Shunt Active Power Filter Performances based on Fuzzy Controller for Harmonic Currents Compensation under Non-Ideal Voltage Conditions

Salim, Chennai; Toufik, Benchouia Mohamed

doi:10.15676/ijeei.2014.6.2.9

Cited by 16 publications

(10 citation statements)

References 21 publications

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“…The existing techniques include phase-locked loops (PLLs) [19,23], zero-crossing detectors (ZCDs) [33,84], and ANN-based synchronizers [57]. SAPFs are widely known to work with balanced systems and ideal source voltages [20,57,85] because their main function is to mitigate harmonic currents generated by nonlinear loads. Hence, the required synchronization angle (sine and cosine functions) is commonly generated by tracking and extracting the phase of the source voltage.…”

Section: Synchronizer Algorithmmentioning

confidence: 99%

“…Nevertheless, this situation can be solved through proper switching control with the help from additional voltage balancing technique [97,98], or capacitor charging control circuit [99]. Furthermore, in order to limit the effects of voltage imbalance, the multilevel inverters employed in most SAPF applications are restricted to three-level inverters [27,83,85]. Hence, in order to simplify the discussion in this section, full attention is given to the case of three-level inverter-based SAPF.…”

Section: Operation Of Sapfs With Multilevel Inverters As Circuit Topomentioning

confidence: 99%

“…These include cascaded H-bridge (CHB) [83], neutral-point diode clamped (NPC) [27,68,85] and flying capacitor (FC) [101]. All topologies (three-phase three-leg three-level) are depicted in Figure 15, and meanwhile their respective characteristics are compared and summarized in Table 1.…”

Section: Comparative Study Of Multilevel Invertersmentioning

confidence: 99%

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Control Algorithms of Shunt Active Power Filter for Harmonics Mitigation: A Review

et al. 2017

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Current harmonics is one of the most significant power quality issues which has attracted tremendous research interest. Shunt active power filter (SAPF) is the best solution to minimize harmonic contamination, but its effectiveness is strictly dependent on how quickly and accurately its control algorithms can perform. This manuscript reviews various types of existing control algorithms which have been employed for controlling operation of SAPF. Harmonic extraction, DC-link capacitor voltage regulation, current control and synchronizer algorithms are examined and discussed. The most relevant techniques which have been applied for each control algorithm are described and contrasted in an organized manner to identify their respective strengths and weaknesses. It is found that the applied control algorithms differ in two conditions: (1) the condition where harmonic current distortion is treated by the SAPF in the presence of non-ideal source voltage; and (2) the condition where multilevel inverter is employed as the circuit topology of SAPF.

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Section: Synchronizer Algorithmmentioning

confidence: 99%

Section: Operation Of Sapfs With Multilevel Inverters As Circuit Topomentioning

confidence: 99%

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Control Algorithms of Shunt Active Power Filter for Harmonics Mitigation: A Review

et al. 2017

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“…The simplification is implemented based on the fact that the zero-sequence current does not exist in balanced three-phase systems [9], [47], [48]. The SAPF is mainly designed to operate in a balanced three-phase system in which the source voltage is assumed to be purely sinusoidal [6], [37], [39]. Thus, the zero-sequence component can be excluded from the calculation.…”

Section: B Proposed Improvements and Simplificationsmentioning

confidence: 99%

A Simplified Synchronous Reference Frame for Indirect Current Controlled Three-level Inverter-based Shunt Active Power Filters

Hoon¹,

Radzi²,

Hassan³

et al. 2016

Journal of Power Electronics

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This paper presents a new simplified harmonics extraction algorithm based on the synchronous reference frame (SRF) for an indirect current controlled (ICC) three-level neutral point diode clamped (NPC) inverter-based shunt active power filter (SAPF). The shunt APF is widely accepted as one of the most effective current harmonics mitigation tools due to its superior adaptability in dynamic state conditions. In its controller, the SRF algorithm which is derived based on the direct-quadrature (DQ) theory has played a significant role as a harmonics extraction algorithm due to its simple implementation features. However, it suffers from significant delays due to its dependency on a numerical filter and unnecessary computation workloads. Moreover, the algorithm is mostly implemented for the direct current controlled (DCC) based SAPF which operates based on a non-sinusoidal reference current. This degrades the mitigation performances since the DCC based operation does not possess exact information on the actual source current which suffers from switching ripples problems. Therefore, three major improvements are introduced which include the development of a mathematical based fundamental component identifier to replace the numerical filter, the removal of redundant features, and the generation of a sinusoidal reference current. The proposed algorithm is developed and evaluated in MATLAB / Simulink. A laboratory prototype utilizing a TMS320F28335 digital signal processor (DSP) is also implemented to validate effectiveness of the proposed algorithm. Both simulation and experimental results are presented. They show significant improvements in terms of total harmonic distortion (THD) and dynamic response when compared to a conventional SRF algorithm.

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“…However, for SAPF applications, the multilevel inverters employed are mostly limited to three-level inverters [2,18,19], as the high number of switching states and severe voltage imbalance problems of multilevel inverters (five-level and above) pose a great challenge in controller design. In three-level neutral-point diode clamped (NPC) inverter, voltage across the two splitting DC-link capacitors must equally be maintained at half of the overall DC-link voltage [2,17,19] so that a balanced injection current can be generated for effective cancellation of harmonic currents. Moreover, if the voltages are unbalanced, there is a high risk of premature switches failure due to over-stresses, and further increases of the total harmonics distortion (THD).…”

Section: Introductionmentioning

confidence: 99%

A Refined Self-Tuning Filter-Based Instantaneous Power Theory Algorithm for Indirect Current Controlled Three-Level Inverter-Based Shunt Active Power Filters under Non-sinusoidal Source Voltage Conditions

et al. 2017

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Abstract:In this paper, a refined reference current generation algorithm based on instantaneous power (pq) theory is proposed, for operation of an indirect current controlled (ICC) three-level neutral-point diode clamped (NPC) inverter-based shunt active power filter (SAPF) under non-sinusoidal source voltage conditions. SAPF is recognized as one of the most effective solutions to current harmonics due to its flexibility in dealing with various power system conditions. As for its controller, pq theory has widely been applied to generate the desired reference current due to its simple implementation features. However, the conventional dependency on self-tuning filter (STF) in generating reference current has significantly limited mitigation performance of SAPF. Besides, the conventional STF-based pq theory algorithm is still considered to possess needless features which increase computational complexity. Furthermore, the conventional algorithm is mostly designed to suit operation of direct current controlled (DCC) SAPF which is incapable of handling switching ripples problems, thereby leading to inefficient mitigation performance. Therefore, three main improvements are performed which include replacement of STF with mathematical-based fundamental real power identifier, removal of redundant features, and generation of sinusoidal reference current. To validate effectiveness and feasibility of the proposed algorithm, simulation work in MATLAB-Simulink and laboratory test utilizing a TMS320F28335 digital signal processor (DSP) are performed. Both simulation and experimental findings demonstrate superiority of the proposed algorithm over the conventional algorithm.

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Three-level (NPC) Shunt Active Power Filter Performances based on Fuzzy Controller for Harmonic Currents Compensation under Non-Ideal Voltage Conditions

Cited by 16 publications

References 21 publications

Control Algorithms of Shunt Active Power Filter for Harmonics Mitigation: A Review

Control Algorithms of Shunt Active Power Filter for Harmonics Mitigation: A Review

A Simplified Synchronous Reference Frame for Indirect Current Controlled Three-level Inverter-based Shunt Active Power Filters

A Refined Self-Tuning Filter-Based Instantaneous Power Theory Algorithm for Indirect Current Controlled Three-Level Inverter-Based Shunt Active Power Filters under Non-sinusoidal Source Voltage Conditions

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