Medium-voltage DC distribution grids in urban areas

Stieneker, Marco; Doncker, Rik W. De

doi:10.1109/pedg.2016.7527045

Cited by 83 publications

(39 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Suggest a novel reconfigurable inverter topology which can perform DC to DC, DC to AC and grid connection at the same time. An experimental prototype of a power balancing circuit to solve mismatching problems while connecting various renewable to a DC link is proposed in [29,30]. Elaborates the concepts of DC house and Null Net Energy (NNE) buildings which supply DC to residential buildings.…”

Section: Existing Work In DC Microgridsmentioning

confidence: 99%

DC Grid for Domestic Electrification

et al. 2019

View full text Add to dashboard Cite

Various statistics indicate that many of the parts of India, especially rural and island areas have either partial or no access to electricity. The main reason for this scenario is the immense expanse of which the power producing stations and the distribution hubs are located from these rural and distant areas. This emphasizes the significance of subsidiarity of power generation by means of renewable energy resources. Although in current energy production scenario electricity supply is principally by AC current, a large variety of the everyday utility devices like cell phone chargers, computers, laptop chargers etc. all work internally with DC power. The count of intermediate energy transfer steps are significantly abridged by providing DC power to mentioned devices. The paper also states other works that prove the increase in overall system efficiency and thereby cost reduction. With an abundance of solar power at disposal and major modification in the area of power electronic conversion devices, this article suggests a DC grid that can be used for a household in a distant or rural area to power the aforementioned, utilizing Solar PV. A system was designed for a household which is not connected to the main grid and was successfully simulated for several loads totaling to 250 W with the help of an isolated flyback converter at the front end and suitable power electronic conversion devices at each load points. Maximum abstraction of operational energy from renewable sources at a residential and commercial level is intended with the suggested direct current systems.

show abstract

Section: Existing Work In DC Microgridsmentioning

confidence: 99%

DC Grid for Domestic Electrification

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The MVDC network typically rated 1.5-30 kV offers power solutions such as derisking VSC-HVDC transmission networks, AC distribution network reinforcements, transmission/distribution level renewable energy (RE) integration, rail transport applications, urban electrification, etc. [2][3][4]. Its feasibility has been extensively demonstrated since the pioneer researches in the US [5,6] Germany [7,8], China [9,10] amongst others from which dynamic DC voltage control, MVDC grid stability analysis, MVDC network protection investigations and assessment of distributed RE integration require urgent exploration [2,8,9].…”

Section: Introductionmentioning

confidence: 99%

Multiterminal Medium Voltage DC Distribution Network Hierarchical Control

et al. 2020

View full text Add to dashboard Cite

In this research study, a multiterminal voltage source converter (VSC) medium voltage DC (MVDC) distribution network hierarchical control scheme is proposed for renewable energy (RE) integration in a co-simulation environment of MATLAB and PSCAD/EMTDC. A DC optimal power flow (DC OPF) secondary controller is created in MATLAB. In PSCAD/EMTDC, the main circuit containing the adaptive DC voltage droop with a dead band and virtual synchronous generator (VSG) based primary controller for the VSCs is implemented. The simulation of the MVDC network under the proposed hierarchical control scheme is investigated considering variations in wind and solar photovoltaic (PV) power. The network is also connected to the standard IEEE-39 bus system and the hierarchical scheme tested by assessing the effect of tripping as well as restoration of the REs. The results show that during random variations in active power such as increasing wind and PV power generation, a sudden reduction or tripping of wind and PV power, the primary controller ensures accurate active power sharing amongst the droop-based VSCs as well as regulates DC voltage deviations within the set range of 0.98–1.02 pu with an enhanced dynamic response. The DC OPF secondary control optimizes the system’s losses by 38% regularly giving optimal droop settings to the primary controllers to ensure proper active power balance and DC voltage stability. This study demonstrates that the hierarchical control strategy is effective for RE integration in the MVDC distribution network.

show abstract

“…The high expectations from SST solutions also include new functionalities, such as integration of energy storage, which can be made by multi-port topologies [5]- [10]. SST is already a competitive solution in several applications such as traction propulsion chain [11], [12], on-board distribution networks for marine [13], [14], photovoltaic parks [15], offshore wind-farms [16], data centers [17], or distribution in urban areas [18]. Fig.…”

Section: Introductionmentioning

confidence: 99%

Open-Loop Power Sharing Characteristic of a Three-Port Resonant LLC Converter

2019

View full text Add to dashboard Cite

The Solid State Transformer (SST) is an attractive solution for highly flexible, cost-effective, compact and efficient power transfer among different grids. Furthermore, a threeport topology is proven as a suitable solution to integrate energy storage resources, the key functionality of emerging SST concept. Among other alternatives, the resonant LLC series resonant converter (SRC) is the cost-effective solution to implement the DC-transformer functionality, which is a core part of the SST. This paper addresses the power sharing characteristics and the zero-voltage switching (ZVS) conditions of a galvanically isolated three-port SRC, operated in DC-transformer mode. A mathematical model, which effectively decouples principal from circulating currents and power flows, is proposed and developed. This new mathematical framework eases the analysis; and reveals a constant power sharing characteristic tightly dominated by the resonant tank parameters even though some degrees of freedom are allowed thanks to the introduction of a differential voltage at the input terminals. Subsequently, design aspects and assessments of working operation conditions are also reported. The accuracy of the proposed model is verified by experimental validation on a labscale prototype.

show abstract

Medium-voltage DC distribution grids in urban areas

Cited by 83 publications

References 8 publications

DC Grid for Domestic Electrification

DC Grid for Domestic Electrification

Multiterminal Medium Voltage DC Distribution Network Hierarchical Control

Open-Loop Power Sharing Characteristic of a Three-Port Resonant LLC Converter

Contact Info

Product

Resources

About