Power Quality Improvement for Grid Connected Inverters under Distorted and Unbalanced Grids

Kim, Hyun-Sou; Kim, Jung-Su; Kim, Kyeong-Hwa

doi:10.6113/jpe.2016.16.4.1578

Cited by 4 publications

(1 citation statement)

References 21 publications

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“…The distortion in three-phase of unbalanced systems are considered as significant disturbances in grid voltages. These voltage disturbances vary in time as several studies have pointed out, with the durations varying from a small proportion of a cycle to fewer cycles (Kim and Kim, 2016). An important power electronic component that adds harmonics to the grid side voltage or current is the battery charger.…”

Section: Introductionmentioning

confidence: 99%

Harmonic current compensator in battery charger using hybrid intelligent controller

Raheni¹,

Thirumoorthi²

2022

Journal of Vibration and Control

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This paper proposes a current-controlled hybrid power filter (CCHPF) to compensate source current harmonics produced by battery charger. Current harmonics are compensated by the voltage- and current-controlled active power filter, whereas in the proposed system, current-controlled hybrid power filter is used. CCHPF overcomes the limitation of voltage-controlled harmonic compensator, conventional proportional integral controller and the passive filter which has high power loss and which may deteriorate the system frequency with high harmonic attenuation. In the proposed control system, the super twisting sliding mode algorithm (STSMA) is used with a modified form of active power theory and cognitive emotional controller to compute the three-phase compensating current reference and the DC link current regulation. The compensated reference signal obtained by sliding mode controller is used to generate switching pulses to current-controlled active power filter (CCAPF) switches. The significant contribution of the proposed system includes the development of CCHPF and its control strategy based on PI- and emotional controller-tuned STSMA to reduce the harmonic distortion of the source current used in electric vehicle charging. The passive power filter is designed to eliminate fifth-order harmonic current. A major advantage of the super twisting sliding mode control algorithm is its adaptability and robustness, which will result in improved reference current tracking without causing chattering. CCHPF is widely used for compensating harmonics generated by electric vehicle battery chargers, UPS systems and industrial loads. The control technique is implemented in MATLAB Simulink environment for dynamic load conditions, and the obtained result compensates the harmonic current to a required level (total harmonic distortion of source current is 0.79%) satisfying IEEE 519-1992 standard.

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Section: Introductionmentioning

confidence: 99%

Harmonic current compensator in battery charger using hybrid intelligent controller

Raheni¹,

Thirumoorthi²

2022

Journal of Vibration and Control

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A robust control algorithm for a multifunctional grid tied inverter to enhance the power quality of a microgrid under unbalanced conditions

Safa

Berkouk

Messlem

et al. 2018

International Journal of Electrical Power & Energy Systems

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An improved sliding mode controller for a multifunctional photovoltaic grid tied inverter

Safa

Berkouk

Messlem

et al. 2017

Journal of Renewable and Sustainable Energy

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This paper proposes a robust control algorithm for a photovoltaic (PV) multifunctional grid tied inverter (MFGTI). The MFGTI is used to simultaneously inject the active power of a PV panel and enhance the power quality of a microgrid. The proposed algorithm will estimate the positive fundamental component of the source current even under strongly disturbed main voltage and load conditions. First, a Sliding Mode Controller is used to estimate the magnitude of the source current. Then, a positive fundamental component estimator is used to estimate the unity vector of the main voltage. By multiplying the output of the two blocks, we obtain a pure sinusoidal source current in phase with the main voltage. Using this algorithm, the MFGTI will inject the active power, compensate the reactive power, and enhance the power quality of the microgrid. Thus, the main grid will only supply some amount of active power with a unity power factor. The proposed algorithm is compared with the conventional method to verify its effectiveness. Several loads and main voltage scenarios are simulated and then experimentally tested. The results prove the superiority and effectiveness of the proposed algorithm.

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Power Quality Improvement for Grid Connected Inverters under Distorted and Unbalanced Grids

Cited by 4 publications

References 21 publications

Harmonic current compensator in battery charger using hybrid intelligent controller

Harmonic current compensator in battery charger using hybrid intelligent controller

A robust control algorithm for a multifunctional grid tied inverter to enhance the power quality of a microgrid under unbalanced conditions

An improved sliding mode controller for a multifunctional photovoltaic grid tied inverter

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