Comparison between the electrical capabilities of the cables used in LV AC and DC power lines

Borioli, Enrico; Brenna, Morris; Faranda, R.; Simioli, G.

doi:10.1109/ichqp.2004.1409390

Cited by 23 publications

(14 citation statements)

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“…A micro-grid can be built using AC or DC current network [8]. Figure 1 shows the overview of network connectivity to distributed generation sources [9]. Despite the fact that the AC micro-grid system has a benefit to utilize existing AC grid technologies, protections and standards ts application involves some problem of low efficiency i due to the number of power conversions required within the crucial current path from the main grid to the loads.…”

Section: Micro-grid or Ac Micro-grid?mentioning

confidence: 99%

Simulation and Analysis of a Compact Electronic Infrastructure for DC Micro-Grid: Necessity and Challenges

Tavakkoli¹,

Radan²,

Hassibi³

2012

SGRE

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Complex circuitry of electronic infrastructure of compact micro-grids with multiple renewable energy sources feeding the loads using parallel operation of inverters acts as a deterrent in developing such systems. This paper deals with applicable techniques reducing the driving circuits in parallel power inverters used in micro-grid system (MGS), mainly focused on the distributed generation (DG) in islanded mode. The method introduced in this paper, gives a minimal and compressed circuitry that can be implemented very cost-effectively with simple components. DC micro-grids are proposed and researched for the good connection with DC output type sources such as photovoltaic (PV), fuel cell, and secondary battery. In this paper, the electronic infrastructure of micro-grid is expressed. Then discussed the reasons for its complexity and the possibility of reducing the elements of electronic circuits are investigated. The reason for this is in order to compact DC micro-grid system for electrification to places like villages. Digital Simulation in Matlab Simulink is used to show the effectiveness of this novel driver topology for parallel operating inverters (NDTPI)

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Section: Micro-grid or Ac Micro-grid?mentioning

confidence: 99%

Simulation and Analysis of a Compact Electronic Infrastructure for DC Micro-Grid: Necessity and Challenges

Tavakkoli¹,

Radan²,

Hassibi³

2012

SGRE

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“…Besides that, LVDC distribution has advantages such as high transmission capacity, low transmission loss, low environmental impact, and low investment costs [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Effective Three-Level Neutral Point Clamped Converter System for the Bipolar LVDC Distribution

Kim

Kim²,

Baek³

et al. 2019

Electronics

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Low-voltage direct current (LVDC) distribution has attracted attention due to increased DC loads, the popularization of electric vehicles, energy storage systems (ESS), and renewable energy sources such as photovoltaic (PV). This paper studies a ±750 V bipolar DC distribution system and applies a 3-level neutral-point clamped (NPC) AC/DC converter for LVDC distribution. However, the 3-level NPC converter is fundamental in the neutral-point (NP) imbalance problem. This paper discusses the NP balance control method using zero-sequence voltage among various solutions to solve NP imbalance. However, since the zero-sequence voltage for NP balance control is limited, the NP voltage cannot be controlled to be balanced when extreme load differences occur. To maintain microgrid stability with bipolar LVDC distribution, it is necessary to control the NP voltage balance, even in an imbalance of extreme load. In addition, due to the bipolar LVDC distribution, the pole where a short-circuit condition occurs limits the short current until the circuit breaker operates, and a pole without a short-circuit condition must supply a stable voltage. Since the conventional 3-level NPC AC/DC converter alone cannot satisfy both functions, an additional DC/DC converter is proposed, analyzed, and verified. This paper is about a 3-level NPC AC/DC converter system for LVDC distribution. It can be used for the imbalance and short-circuit condition in bipolar LVDC distribution through the prototype of the 300 kW 3-level NPC AC/DC converter system and experimented and verified in various conditions.

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“…Several studies looking at existing infrastructure have previously proposed that the change from low voltage AC (LVAC) to low voltage direct current can substantially increase the power capacity of a distribution system as well as minimise losses, especially in a network containing distributed generation [7][8][9]. Energy storage and the increase in renewable generation penetration will benefit from a DC network by the reduction of complexity and the fact that they are already run on DC.…”

Section: Introductionmentioning

confidence: 99%

Transition from alternating current to direct current low voltage distribution networks

Antoniou

Tzimas

Rowland

2015

IET Generation, Transmission & Distribution

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Maximising the capacity of the existing alternating current (AC) distribution network infrastructure by conversion to direct current (DC) may hold significant advantages. In particular it may provide a greater flow of electrical energy within urban areas, allowing a lower investment cost for adoption of electrical vehicles and domestic heating. Integration with Smart Grid applications will require maintained levels of reliability, and improved efficiency and flexibility. The transition of the cable infrastructure from the legacy low voltage AC system to low voltage DC is considered in this study. In particular this study investigates the limitations of DC supplied through the existing distribution network without major reconstruction , and proposes optimal configurations that could be adopted in a smart-DC distribution network. The implications for power flow in the network are considered with regards to existing cable limitations. It is concluded that a better understanding of cable and joint reliability is required before such changes are made to existing LV networks.

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Comparison between the electrical capabilities of the cables used in LV AC and DC power lines

Cited by 23 publications

References 1 publication

Simulation and Analysis of a Compact Electronic Infrastructure for DC Micro-Grid: Necessity and Challenges

Simulation and Analysis of a Compact Electronic Infrastructure for DC Micro-Grid: Necessity and Challenges

Analysis of Effective Three-Level Neutral Point Clamped Converter System for the Bipolar LVDC Distribution

Transition from alternating current to direct current low voltage distribution networks

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