Assessing the loadability of active distribution networks in the presence of DC controllable links

Ramos, Esther Romero; Gómez-Expósito, Antonio; Marano-Marcolini, Alejandro; Ortega, José María Maza; Martínez-Ramos, José L.

doi:10.1049/iet-gtd.2011.0080

Cited by 60 publications

(35 citation statements)

References 7 publications

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“…However, a hybrid structure paves the way for a gradual transition. This paper extends the concept proposed in [12]. The ac distribution grid is augmented with a system of dc inter-connecting lines for the efficient evacuation of surplus power and distributing to the feeders with excess load.…”

Section: Introductionmentioning

confidence: 93%

“…[10]. Recent [11], [12] describe the use of dc-links to improve the performance and hosting capability of the ac distribution system. An optimization framework, from the power system operation point of view, has been developed in [12] to evaluate the increase in hosting capacity of the ac distribution system by using the dc-links to interconnect them.…”

Section: Introductionmentioning

confidence: 99%

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Distribution system augmented by DC links for increasing the hosting capacity of PV generation

Chaudhary

Demirok

Teodorescu

2012

2012 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)

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This paper presents a concept of enhancing the photovoltaic (PV) power generation hosting capacity of distribution networks. Distribution network serving electrical energy to farm settlements was selected as an example for their large roof area available for PV installation. Further, they are characterized by long radial feeders. Such feeders suffer from voltage rise and transformer overloading problems as the total number and capacity of the PV installations increase. The distribution network can be augmented by dc distribution links with power electronic converter interfaces to the traditional ac distribution systems. It is shown here that the dc links can be used to interconnect the different radial feeders and the excess power thus could be transferred to the nearby industrial loadcenter.Index Terms-Distribution system, voltage source converter, direct-current (dc) link, photovoltaic (PV) generation.

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Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Distribution system augmented by DC links for increasing the hosting capacity of PV generation

Chaudhary

Demirok

Teodorescu

2012

2012 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)

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“…On the other hand, taking into account that the switching centers are usually located at the remote end of the feeders, the reactive power injection may contribute effectively to the voltage regulation. The flexible DC links can be operated considering different purposes: maximize DG penetration, maximize network loadability and minimize power losses [63]. Alternative shunt-series topologies to the conventional multi-terminal AC/DC VSC, have been also proposed aimed at reducing the investment cost of the device [64].…”

Section: Distributionmentioning

confidence: 99%

Overview of power electronics technology and applications in power generation transmission and distribution

Ortega

Acha

García

et al. 2017

J. Mod. Power Syst. Clean Energy

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The main objective of this paper is three-fold. First, to provide an overview of the current status of the power electronics technology, one of the key actors in the upcoming smart grid paradigm enabling maximum power throughputs and near-instantaneous control of voltages and currents in all links of the power system chain. Second, to provide a bridge between the power systems and the power electronic communities, in terms of their differing appreciation of how these devices perform when connected to the power grid. Third, to discuss on the role that the power electronics technology will play in supporting the aims and objectives of future decarbonized power systems. This paper merges the equipment, control techniques and methods used in flexible alternating current transmission systems (FACTS) and high voltage direct transmission (HVDC) equipment to enable a single, coherent approach to address a specific power system problem, using 'best of breed' solutions bearing in mind technical, economic and environmental issues.

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“…In modern power systems, Renewable Energy Sources (RES) with power electronic grid interfaces are increasingly replacing traditional generation plants [9]. However, power electronic converters with conventional control strategies do not inherently provide physical inertia, and reduced equivalent system inertia may compromise the stability of power systems under severe disturbances [10].…”

Section: Introductionmentioning

confidence: 99%

Coupling of AC Grids via VSC-HVDC Interconnections for Oscillation Damping Based on Differential and Common Power Control

Rodríguez-Cabero

Roldán-Pérez

Prodanović

et al. 2020

IEEE Trans. Power Electron.

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This paper presents a control approach for HVDC interconnections that provides damping of frequency oscillations in asynchronous ac grids by introducing a virtual friction for coupling their inertial dynamics. The HVDC interconnection is modelled by using the concept of common and differential power flow, allowing for independent control of the dc voltage and the net power transfer between HVDC terminals, respectively. The proposed controller introduces a damping effect in the differential power flow which is equivalent to a mechanical friction between the generators connected to the ac grids at the two terminals. This virtual friction-based damping can effectively attenuate poorly damped frequency oscillations that can be observed where the HVDC interconnection is interfaced to either of the ac grids without relying on fast communication between the converter terminals. The impact of the proposed control technique on the stability and damping of two interconnected power systems is first analysed by using a simplified model. Then, the sensitivity to the frequency and damping of the oscillation modes appearing in the ac grid frequencies, as well as the effect of the dc line resistance on the oscillation damping are evaluated. Finally, the control system performance is experimentally validated on a scaled laboratory setup.

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Assessing the loadability of active distribution networks in the presence of DC controllable links

Cited by 60 publications

References 7 publications

Distribution system augmented by DC links for increasing the hosting capacity of PV generation

Distribution system augmented by DC links for increasing the hosting capacity of PV generation

Overview of power electronics technology and applications in power generation transmission and distribution

Coupling of AC Grids via VSC-HVDC Interconnections for Oscillation Damping Based on Differential and Common Power Control

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