Novel multi‐terminal MMC‐based dc/dc converter for MVDC grid interconnection

Jafarishiadeh, Seyyedmahdi; Vahidinasab, Vahid; Sadigh, Arash Khoshkbar; Farasat, Mehdi

doi:10.1049/iet-pel.2017.0164

Cited by 15 publications

(6 citation statements)

References 29 publications

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“…MVDC networks connecting multiple MVAC grids would provide voltage support, power quality, and flexibility [118]. Multiterminal systems can be extended to more readily than ring networks can and offer the ability to intertie multiple networks at one point [119,120]. The protection and control of multiterminal MVDC networks need further research and development due to the inherent instability of MTDC VSC-based systems [115].…”

Section: Grid Topologiesmentioning

confidence: 99%

Review of MVDC Applications, Technologies, and Future Prospects

Coffey

Timmers

et al. 2021

Energies

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This paper presents a complete review of MVDC applications and their required technologies. Four main MVDC applications were investigated: rail, shipboard systems, distribution grids, and offshore collection systems. For each application, the voltage and power levels, grid structures, converter topologies, and protection and control structure were reviewed. Case studies of the varying applications as well as the literature were analyzed to ascertain the common trends and to review suggested future topologies. For rail, ship, and distribution systems, the technology and ability to implement MVDC grids is available, and there are already a number of case studies. Offshore wind collection systems, however, are yet able to be implemented. Across the four applications, the MVDC voltages ranged from 5–50 kV DC and tens of MW, with some papers suggesting an upper limit of 100 kV DC and hundreds of MV for distribution networks and offshore wind farm applications. This enables the use of varying technologies at both the lower and high voltage ranges, giving flexibility in the choice of topology that is required required.

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Section: Grid Topologiesmentioning

confidence: 99%

Review of MVDC Applications, Technologies, and Future Prospects

Coffey

Timmers

et al. 2021

Energies

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“…Medium-voltage dc and high-voltage dc grids have been the focus of many research studies recently regarding their increasing applications in rapidly growing grid-connected renewable energy systems, such as wind, solar and wave farms [10][11][12][13][14][15]. To connect dc renewable resources to the grid Voltage Sourced Converters (VSC) are used commonly [16].…”

Section: Medium-voltage Step Up DC / Dc Convertersmentioning

confidence: 99%

Untitled

2018

International Advanced Research Journal in Science, Engineering

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For the past few years, interest in wave energy is growing very fast. The ocean holds massive amount of clean and untouched energy, which can show an important role in supplying our energy demand. It is approximated that total energy from the coast of the United States is 252 million MWh/year. Oceans and sees around the world contain plentiful amount of energy that exceeds today's power generation needs. Wave Energy Converters (WEC) are devices to convert wave energy into electrical energy. One example of WEC technology is Oscillating Water Columns (OWCs). OWCs are devices with a semi-submerged chamber or hollow open to the sea below, keeping a trapped air pocket above a water column. Waves force the column to act like a piston, moving up and down, forcing the air out of the chamber and back into it. This continuous movement force a bidirectional stream of high-velocity air, which is channelled through a Power-TakeOff (PTO). The PTO system converts the airflow into energy. This paper discusses different types of wave energy converters and challenges regarding their integration to power grid.

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“…In the study [14], the power loss in the HVDC transmission line has been calculated and simulated in two models. Jafarishiadeh et al [15] suggested a novel dc/dc converter for linking multiple DC grids with various voltage levels while additionally controlling the power flow between them. In the study [16], HVDC links/bipolar connections were added in a power system to enhance the voltage profile.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Power Transmission Stability with HVDC Systems During Load Contingencies

Merzah,

Abbas,

Tuaimah

2024

JESA

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The transmission network of a power system is important in connecting interactions between the generation and distribution sides. A significant aspect in the power system profile is voltage improvement. This study intends to examine the impact of inserting High Voltage Direct Current (HVDC) on the system's voltage stability, network power losses and power transfer capacity of transmission network under several cases of load contingency. IEEE 57-Bus test system is used for testing the addition of HVDC transmission based on genetic algorithm. Modeling of point-to-point HVDC transmission and multi-terminal HVDC transmission is carried out using the Power System Simulator for Engineering (PSS/E) version 32 Package Program (A collection of computer programs and organized data files called PSS/E software was developed by Siemens PTI to handle the fundamental tasks of power system performance simulation work). The system's performance was compared with and without the HVDC inserted under different loading scenarios: 5%, 10%, and 20% of the total load. The comparative results can show that active power losses at the normal load case are reduced by 55.714% after inserting point to point HVDC topology, and after inserting multi-terminal HVDC topology reduced by 68.214%. Also, the reactive power losses reduce by 55.714% after inserting point to point HVDC topology and after inserting multi-terminal HVDC topology reduced by 66.830% at the same case. The results shown that inserting HVDC Transmission to the system gives better improvement in bus voltage profile and a significant reduction in total network power losses and increase in power transfer capacity of transmission network. The results also showed that multi-terminal HVDC transmission is better in voltage improvement and total power losses reduction when HVDC Transmission is added to the system.

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Novel multi‐terminal MMC‐based dc/dc converter for MVDC grid interconnection

Cited by 15 publications

References 29 publications

Review of MVDC Applications, Technologies, and Future Prospects

Review of MVDC Applications, Technologies, and Future Prospects

Untitled

Enhancing Power Transmission Stability with HVDC Systems During Load Contingencies

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