Active and reactive power control during unbalanced grid voltage in PV systems

Hunter, Gustavo; Andrade, Ivan; Riedemann, Javier; Blasco-Gimenez, R.; Peña, R.

doi:10.1109/iecon.2016.7793525

Cited by 11 publications

(3 citation statements)

References 13 publications

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“…Voltage stability issues, fault detection, current control and oscillation of the active and the reactive powers are recognized as a serious concern in distribution networks under abnormal conditions with the increasing level of PV system penetration [12]. Grid faults are the leading cause of over-voltage and overcurrent at the both DC and AC sides of PV inverters and the oscillation of output powers at the PCC of the PV system [13].…”

Section: Lvrt In Pv Systemsmentioning

confidence: 99%

Low-voltage ride-through for a three-phase four-leg photovoltaic system using SRFPI control strategy

Kamil¹,

Said²,

Mustafa³

et al. 2019

IJECE

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With the innovative progresses in power electronics in recent years, photovoltaic (PV) systems emerged as one of the promising sources for electricity generation at the distribution network. Nonetheless, connection of PV power plants to the utility grid under abnormal conditions has become a significant issue and novel grid codes should be recommend. The low-voltage ride-through (LVRT) capability is one of the challenges faced by the integration of PV power stations into electrical grid under abnormal conditions. This work firstly provides a discussion on recent control schemes for PV power plants to enhance the LVRT capabilities. Next, a control scheme for a three-phase four-leg grid-connected PV inverter under unbalanced grid fault conditions using synchronous reference frame proportional integral (SRFPI) controller is proposed. Simulation studies are performed to investigate the influence of the control strategy on the PV inverter.

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Section: Lvrt In Pv Systemsmentioning

confidence: 99%

Low-voltage ride-through for a three-phase four-leg photovoltaic system using SRFPI control strategy

Kamil¹,

Said²,

Mustafa³

et al. 2019

IJECE

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“…Alternatively, if a grid‐connected PV system can offer ancillary services such as reactive power support and low‐voltage ride‐through (LVRT) capabilities, 12 the end user will not experience flicker or poor power quality, and PSOs will not have to restrict PV electrical grid integration. Such PV‐grid systems will be smarter and more actively controlled in the coming years, thereby making the system more reliable.…”

Section: Introductionmentioning

confidence: 99%

Laguerre polynomial function‐based inverter control with low‐voltage ride‐through capabilities

Pandey

Singh

2022

Circuit Theory & Apps

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This work discusses the design of a Laguerre polynomial (LP)‐based control technique to govern the functioning of a single‐phase grid connected to a voltage source converter (VSC). The controller is trained online using the least means square (LMS) approach to compute the load fundamental current. The controller is designed to alleviate power quality (PQ) issues and work in different modes. Apart from the normal operation mode, the controller is provided with an additional capability to ride over voltage sags caused by grid faults. During this low‐voltage ride‐through (LVRT) mode, the VSC injects the required reactive power to grid. The work demonstrates the results under normal grid conditions when the system can function in unity power factor (UPF) as well as in abnormal grid conditions when it needs to operate in LVRT mode. Extensive simulation and experimental results under various cases have been discussed with the proposed LP‐based controller to demonstrate the feasibility of the approach.

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“…Whereas most previous works have considered the use of negative sequence currents to regulate active and reactive current references during unbalanced faults, the effects of zero-sequence voltages have been addressed in [27] where simulations results have been presented. This paper presents an experimental implementation to obtain a real-time validation of the control strategy presented in [28], intended to inject the desired active/reactive power during asymmetrical voltage sags and swells in a single-stage PV system.…”

Section: Introductionmentioning

confidence: 99%