Photovoltaic power plant as FACTS devices in multi-feeder systems

Moawwad, Ahmed; Khadkikar, Vinod; Kirtley, James L.

doi:10.1109/iecon.2011.6119433

Cited by 11 publications

(5 citation statements)

References 14 publications

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“…Therefore, according to (12), (13) and (16), the I pv(pu)_min curves with respective to PF under different SCRs can be depicted by Fig. 8, where k=1.05.…”

Section: Coordination Of Active Power and Reactive Power Of Pv Plmentioning

confidence: 99%

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Adaptive Reactive Power Control of PV Power Plants for Improved Power Transfer Capability Under Ultra-Weak Grid Conditions

Yang

Wang

Liu

et al. 2019

IEEE Trans. Smart Grid

111

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This paper analyzes the power transfer limitation of the PV power plant under the ultra-weak grid condition, i.e., when the Short-Circuit Ratio (SCR) is close to 1. It explicitly identifies that a minimum SCR of 2 is required for the PV power plant to deliver the rated active power when operating with the unity power factor. Then, considering the reactive power compensation from PV inverters, the minimum SCR in respect to Power Factor (PF) is derived, and the optimized coordination of the active and reactive power is exploited. It is revealed that the power transfer capability of PV power plant under the ultra-weak grid is significantly improved with the low PF operation. An adaptive reactive power droop control is next proposed to effectively distribute the reactive power demands to the individual inverters, and meanwhile maximize the power transfer capacity of the PV power plant. Simulation results of a 200 MW PV power plant demonstrate that the proposed method can ensure the rated power transfer of PV power plant with the SCR of 1.25, provided that the PV inverters are operated with the minimal PF=0.9.

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“…Therefore, according to (12), (13) and (16), the I pv(pu)_min curves with respective to PF under different SCRs can be depicted by Fig. 8, where k=1.05.…”

Section: Coordination Of Active Power and Reactive Power Of Pv Plmentioning

confidence: 99%

“…The PV power plant can be controlled as FACTS devices [13], which provides a cost-effective solution to damp the sub-synchronous oscillations [14] and improve transient stability of the power system [15]. The prerequisite of these control functions is that the excessive power capacity is available from the PV inverters.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Reactive Power Control of PV Power Plants for Improved Power Transfer Capability Under Ultra-Weak Grid Conditions

Yang

Wang

Liu

et al. 2019

IEEE Trans. Smart Grid

111

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show abstract

“…[13] Among the FACTS controllers, Unified Power Flow Controller (UPFC), is the most complete. It is capable of utilizing three basic electrical system variables [11] line voltage, line impedance, and phase angle, that determine the transmitted power. The throughput active and reactive powers can be control independently by the UPFC.…”

Section: Facts Controllersmentioning

confidence: 99%

“…Therefore it becomes necessary to require renewable sources for continuous operation during grid disturbances and thereby providing support for the network voltage and frequency [9]. Some of the commonly used devices for this support is the FACTS devices which include: Static synchronous series compensator (SSSC), static synchronous compensator (STATCOM), interline power flow controller (IPFC), unified power flow controller (UPFC) and thyristor controlled series compensator (TCSC) [10], [11] and [12]. Ideally these controllers should be connected to the power system in a proper way because improperly placed controllers fail to produce optimum performance and can even be counterproductive, that's why the placement of these devices is of a great importance.…”

Section: Introductionmentioning

confidence: 99%

Optimisation Techniques for Location of Flexible AC Transmission System Devices in Power Systems

Wahab¹,

Musa²,

Ahmed³

et al. 2013

JESTR

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Flexible AC Transmission System (FACTS) devices are the key to produce electrical energy economically and environmental friendly in a deregulated market. Implemented through a new equipment consisting high power electronics based technologies, it opens up new opportunities for controlling line power flows, minimizing losses and maintaining bus voltages at desired level in a power system network. In large, interconnected power systems, power system damping is often reduced, leading to lightly damped electromechanical modes of oscillations. Proper controller design and installation of this system becomes essential for control and operation improvement of power systems networks. Three categories of FACTS controllers may be distinguished: Series controllers; Shunt controllers; Combined series-shunt controllers. The location of these devices depends on the amount of local load and through load and from transient stability point of view their location moves towards the sending-end. The optimal location for the device is not in the mid-point of the line but rather, slightly off-center of the transmission line gives better performance for maximum benefit and depends on the line resistance and is linearly increased as R/X ratio of the line is increased. The paper attempted to highlight best location and control strategy for this device that, guarantee security and stability of the power system networks for maximum benefits.

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“…PV plants and FACTS devices have a common element, the inverter; therefore, PV plants can be operated as FACTS devices [14], which can be useful for both real power generation and reactive power compensation [15]. The PV inverter is used as a STATCOM, which is also called a PV-STATCOM.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of power transfer capacity of transmission network using multilevel multifunction inverter

Nathgosavi,

Joshi

2023

Acta Polytech

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This article presents a multilevel multifunction inverter (MLMFI) with a novel controller for the grid-connection of a solar array. The aim of this work is to improve the technology of the power transfer capacity of existing transmission lines in order to alleviate the current energy crisis. An effective mathematical modelling of an MLMFI configuration having two series-connected H-bridges per phase with isolated solar arrays is presented. A novel closed-loop controller is proposed for reference signal generation using the PWM technique. With the proposed controller, the power flow in a transmission line is analysed for daytime and nighttime conditions. The proposed controller performance was tested on a realistic single-machine infinite-bus power system with midpoint MLMFI using MATLAB simulation software. The proposed MLMFI-based solar array enhanced the stable power transfer limit of a transmission line. A comparative analysis between conventional and proposed controllers for power flow and transient stability studies was also presented. The proposed MLMFI results were validated by developing an experimental model.

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Photovoltaic power plant as FACTS devices in multi-feeder systems

Abstract: Abstract-----

Cited by 11 publications

References 14 publications

Adaptive Reactive Power Control of PV Power Plants for Improved Power Transfer Capability Under Ultra-Weak Grid Conditions

Adaptive Reactive Power Control of PV Power Plants for Improved Power Transfer Capability Under Ultra-Weak Grid Conditions

Optimisation Techniques for Location of Flexible AC Transmission System Devices in Power Systems

Enhancement of power transfer capacity of transmission network using multilevel multifunction inverter

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