A Grid-Connected Photovoltaic System with Direct Coupled Power Quality Control

Ko, Seung Hyeon; Lee, Seong‐Ryong; Dehbonei, H.; Nayar, C.V.

doi:10.1109/iecon.2006.347757

Cited by 18 publications

(11 citation statements)

References 14 publications

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“…The current distortion caused by reactive power consumption is compensated by designing and adding a reactive power conditioner function integrated in the PVinverter unit. In [10] and [11], this function is embedded in the current control and MPPT mechanism of the PV-inverters. In [12] and [13], PV-inverter is designed to enable it to role as a reactive power conditioner unit.…”

Section: Introductionmentioning

confidence: 99%

Power quality improvement for distributed generation employing photovoltaic-inverter

Hamid

Jusoh

Anwari

2011

2011 IEEE Applied Power Electronics Colloquium (IAPEC)

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Power quality problems such as variation of reactive power consumption and distorted current injection in distributed generation system can be compensated by a single-phase conditioner. The proposed conditioner works in feed forward mode and placed in parallel with the PV-inverters in the distributed generation system. A simple current extraction method is applied and an operating algorithm of the conditioner's hysteresis current controller is implemented. The proposed conditioner is simulated using Simulink/Matlab. The simulation has shown that the current detection method and the hysteresis current control based on the proposed algorithms are worked well and capable to improve the quality of injected currents to the main grid system.

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Section: Introductionmentioning

confidence: 99%

Power quality improvement for distributed generation employing photovoltaic-inverter

Hamid

Jusoh

Anwari

2011

2011 IEEE Applied Power Electronics Colloquium (IAPEC)

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“…One of the important drawbacks of a grid-tied PV system is the existence of an inverter as interface between the PV system and the grid. This leads to many problems: safety, efficiency, stability (voltage and frequency), increased level of harmonics, and poor power factor of the entire system [9,10]. To minimize the effects of grid-connected PV systems, specific grid requirements regarding the penetration of grid-connected PV systems in low voltage networks have been put forward, Figure 1 shows the block diagram of the system presented in this research work.…”

Section: Introductionmentioning

confidence: 99%

Fuzzy Logic Control for Low-Voltage Ride-Through Single-Phase Grid-Connected PV Inverter

et al. 2019

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This paper presents a control scheme for a photovoltaic (PV) system that uses a single-phase grid-connected inverter with low-voltage ride-through (LVRT) capability. In this scheme, two PI regulators are used to adjust the power angle and voltage modulation index of the inverter; therefore, controlling the inverter’s active and reactive output power, respectively. A fuzzy logic controller (FLC) is also implemented to manage the inverter’s operation during the LVRT operation. The FLC adjusts (or de-rates) the inverter’s reference active and reactive power commands based on the grid voltage sag and the power available from the PV system. Therefore, the inverter operation has been divided into two modes: (i) Maximum power point tracking (MPPT) during the normal operating conditions of the grid, and (ii) LVRT support when the grid is operating under faulty conditions. In the LVRT mode, the de-rating of the inverter active output power allows for injection of some reactive power, hence providing voltage support to the grid and enhancing the utilization factor of the inverter’s capacity. The proposed system was modelled and simulated using MATLAB Simulink. The simulation results showed good system performance in response to changes in reference power command, and in adjusting the amount of active and reactive power injected into the grid.

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“…At present, a single-function inverter cannot meet the needs of modern power equipment, and it is necessary to design a system that can control the current at point of common coupling (PCC) and suppress the harmonics of the grid. Single-function systems are slowly evolving toward large-scale composite systems [1]. The grid-connected inverter is the critical equipment for grid-connected power generation of renewable energy.…”

Section: Introductionmentioning

confidence: 99%

A Novel Strategy Based on Linear Active Disturbance Rejection Control for Harmonic Detection and Compensation in Low Voltage AC Microgrid

et al. 2019

Energies

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In an AC microgrid, harmonic distortion is mainly caused by power electronic equipment and nonlinear loads. In this paper, linear active disturbance rejection control (LADRC) is used to control the fundamental current at the point of common coupling (PCC). Meanwhile, an active power filter (APF) is added to eliminate the harmonic current generated by the nonlinear loads. The tracking differentiator (TD) in active disturbance rejection control (ADRC) serves as a low-pass filter (LPF) in the harmonic detection algorithm of APF. Compared to traditional harmonic detection algorithms, the improved strategy solves the contradiction between rapidity, accuracy, and overshoot of filtering. LADRC has good performance of disturbance rejection, internal decoupling, and accessible parameters tuning. It can observe the internal uncertainty and external disturbance of the system as the total disturbance through the extended state observer (ESO), and compensate it in time through state feedback to make the system achieve the desired performance. The abilities of resonance suppression for LCL-type filter and internal decoupling of LADRC demonstrates its advantages through frequency domain analysis and simulation. The proposed strategy was simulated in MATLAB/SIMULINK and realized in the experimental hardware platform, and the effectiveness of the proposed strategy is approved.

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A Grid-Connected Photovoltaic System with Direct Coupled Power Quality Control

Cited by 18 publications

References 14 publications

Power quality improvement for distributed generation employing photovoltaic-inverter

Power quality improvement for distributed generation employing photovoltaic-inverter

Fuzzy Logic Control for Low-Voltage Ride-Through Single-Phase Grid-Connected PV Inverter

A Novel Strategy Based on Linear Active Disturbance Rejection Control for Harmonic Detection and Compensation in Low Voltage AC Microgrid

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