Journal ArticleDOI
Combined Central and Local Active and Reactive Power Control of PV Inverters
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TLDR
In this paper, local controllers of active and reactive power that are based on measurements of the produced PV power have been evaluated on an existing three-phase four-wire distribution grid and compared with different local control methods.Abstract:
The increasing amount of photovoltaic (PV) generation results in a reverse power flow and a violation of the overvoltage limits in distribution networks. PV inverters can curtail active power or consume reactive power to avoid these excessive high voltages. Local controllers of active and reactive power that are based on measurements of the produced PV power have a fast response to the changing production levels of the PV installation. The performance of these local controllers depends on the tuning of the control parameters, which are grid and time dependent. In this paper, local control functions are defined as piecewise linear functions. The parameters of all the local control functions are regularly reoptimized. This results in an optimal use of reactive power and a minimum amount of curtailed active power, while respecting network limitations. The optimization of these parameters is formulated as a convex optimization problem, which can be solved sufficiently fast. The performance of the control is evaluated on an existing three-phase four-wire distribution grid and is compared with different local control methods.read more
Citations
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Journal ArticleDOI
Mitigating methods of power fluctuation of photovoltaic (PV) sources – A review
TL;DR: In this paper, a comprehensive literature review on problems associated when the intermittent PV is connected to grid and the methods of smoothing the output power fluctuation from PV is presented, also briefly discusses control strategy built for battery energy storage pertaining to this issue.
Journal ArticleDOI
Distributed Control of Battery Energy Storage Systems for Voltage Regulation in Distribution Networks With High PV Penetration
TL;DR: A coordinated control strategy is proposed to regulate the charge/discharge of BESs using a combination of the local droop-based control method and a distributed control scheme which ensures the voltages of feeder remain within allowed limits.
Journal ArticleDOI
Distribution Voltage Regulation Through Active Power Curtailment With PV Inverters and Solar Generation Forecasts
TL;DR: In this article, a local voltage regulation technique that utilizes very short-term (15 s) PV power forecasts to circumvent imminent upper voltage limit violation or an overvoltage scenario is proposed.
Journal ArticleDOI
Load Balancing With EV Chargers and PV Inverters in Unbalanced Distribution Grids
Sam Weckx,Johan Driesen +1 more
TL;DR: In this article, a classic coordinated charging strategy for EVs is adapted in a three-phase four-wire distribution grid, which can host significantly more distributed generation and electric vehicles, without overloading the inverter or charger.
Journal ArticleDOI
Methods and strategies for overvoltage prevention in low voltage distribution systems with PV
TL;DR: A combination of overvoltage prevention methods and coordination between voltage control units can provide an efficient solution to increase the PV hosting capacity of LV grids.
References
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Journal ArticleDOI
A Voltage and Frequency Droop Control Method for Parallel Inverters
TL;DR: In this paper, a new control method for the parallel operation of inverters operating in an island grid or connected to an infinite bus is described, where each inverter supplies a current that is the result of the voltage difference between a reference ac voltage source and the grid voltage across a virtual complex impedance.
Journal ArticleDOI
A three-phase power flow method for real-time distribution system analysis
C.S. Cheng,D. Shirmohammadi +1 more
TL;DR: In this article, a three-phase power flow solution method for real-time analysis of primary distribution systems is presented, with the emphasis on modeling of dispersed generation (PV nodes), unbalanced and distributed loads, and voltage regulators and shunt capacitors with automatic local tap controls.
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Coordinated Active Power Curtailment of Grid Connected PV Inverters for Overvoltage Prevention
TL;DR: In this paper, the authors discuss the use of droop-based active power curtailment techniques for overvoltage prevention in radial LV feeders as a means for increasing the installed PV capacity and energy yield.
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Options for Control of Reactive Power by Distributed Photovoltaic Generators
TL;DR: In this article, the authors discuss and compare via simulation various design options for control systems to manage the reactive power generated by these inverters, and find that local control schemes are able to maintain voltage within acceptable bounds.
Journal ArticleDOI
Centralized and Distributed Voltage Control: Impact on Distributed Generation Penetration
TL;DR: In this article, the authors compared the performance of reactive power control and intelligent distributed voltage control in terms of the potential for connecting increased capacities within existing networks. And they showed that the results obtained by the reactive control gave similar results to those obtained by centralized management in the case of the DG.