Analysis of bidirectional 15 MW current source DC/DC converter for series-connected superconducting-based 1 GW/100 kV offshore wind farm

Li, Peng; Jovcic, Dragan; Hodge, Eoin; Fitzgerald, John

doi:10.1016/j.epsr.2021.107618

Cited by 5 publications

(9 citation statements)

References 26 publications

(46 reference statements)

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“…An active voltage source converter (VSC), termed 'Bridge 1′, is realized as a 3-phase 2-level VSC (3-Ph 2L-VSC) topology with space vector modulation (SVM) control. The isolated DC/DC converter employs 'Bridge 2,′ a medium frequency transformer (MFT) and 'Bridge 3.′ Bridge 2 is a voltage source converter (2L-VSC) with 180 • square wave modulation, considering higher fundamental frequency [15]. 'Bridge 3′ is realized using a 3-phase thyristor-based topology with six-step modulation control referenced to the AC voltage waveform or gate signals of 'Bridge 2′.…”

Section: Windfarm Power Generationmentioning

confidence: 99%

“…'Bridge 3′ is realized using a 3-phase thyristor-based topology with six-step modulation control referenced to the AC voltage waveform or gate signals of 'Bridge 2′. It is worth mentioning that 'Bridge 2′can also utilize a neutral-point-clamped (NPC) topology as proposed in [15], which has the benefit of reduced commutation voltage for the thyristors and flexible voltage control capability that leads to lower switching losses (not used here because of complexity). The transmission voltage, V HVDC , (also the string voltage) is the sum of individual generator DC voltages in a string.…”

Section: Windfarm Power Generationmentioning

confidence: 99%

“…The transmission voltage, V HVDC , (also the string voltage) is the sum of individual generator DC voltages in a string. A full bridge modular multilevel HVDC converter (FB-MMC) is employed onshore at the grid connection point to control the transmission voltage, which also benefits not only in scalability, modularity, reduced power loss, reduced AC voltage distortion, and good DC fault tolerance [15,16], but also brings capability of operating either as a current source or as a voltage source [17].…”

Section: Windfarm Power Generationmentioning

confidence: 99%

“…Our calculations show that this space will not be sufficient to accommodate HV platform and equipment on the platform (MF transformer and bridge 3). An additional housing for HV equipment is assumed beside the tower as shown in Figure 4, and also discussed in [15].…”

Section: Cost Of High-voltage Insulated Generatorsmentioning

confidence: 99%

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Optimisation of topology, rating, control and insulation coordination of a large series–parallel DC windfarm

Shehu,

Jovcic,

2023

IET Renewable Power Gen

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This study presents the design of a large DC series‐parallel windfarm that considers the key operational challenges in determining the optimal generator equipment rating and DC transmission voltage control. With this topology, offshore platform is not needed, but wind speed dispersion over windfarms and generator outage possibilities demand generator DC output voltages beyond their ratings. An optimization algorithm is developed along with a complete cost model, which includes operational and capital costs with all topology options, in order to inform design decisions. The results are evaluated on a 100‐generator, 25 × 4, 1 GW, 525 kV test wind farm and performance is verified using detailed PSCAD/EMTDC time‐domain simulation. The key finding is that a positive net present value (NPV) is achieved, avoiding power curtailment even under 3% generator outage, when an overvoltage coefficient of 1.145 pu is utilised on all wind generators, assuming use of a suitable DC transmission voltage control. Further, a wide‐ranging parameter sensitivity analysis is performed, and tower arrangement for insulation requirements is proposed.

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Section: Windfarm Power Generationmentioning

confidence: 99%

Section: Windfarm Power Generationmentioning

confidence: 99%

Section: Windfarm Power Generationmentioning

confidence: 99%

Section: Cost Of High-voltage Insulated Generatorsmentioning

confidence: 99%

See 2 more Smart Citations

Optimisation of topology, rating, control and insulation coordination of a large series–parallel DC windfarm

Shehu,

Jovcic,

2023

IET Renewable Power Gen

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“…The efficiency and optimal operation of the wind farm have been affected by the control of a few parameters. These parameters are counted as maximum power point tracking (MPPT), [ 185 ] speed/torque control, [ 186 ] power electronic converter control, [ 180,187 ] and pitch angle control. [ 188 ] The main way to enhance the efficiency of the wind plant is to apply an MPPT algorithm to the measured and collected wind data.…”

Section: Requirements and Technical Challengesmentioning

confidence: 99%

A Review on Wind Power Forecasting Regarding Impacts on the System Operation, Technical Challenges, and Applications

et al. 2022

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Wind energy generation is a fast developing efficient renewable source widely used for modern power generation. [1] Countries and energy companies have increased their interest in electricity generation from wind energy in the last decades, thanks to its natural, cost-free, and environmentally friendly features. [2] Wind power plants can generate electrical energy at any time of the day and are distributed energy sources for systems that need permanent energy. [3] Nonetheless, due to the disordered nature of the earth's atmosphere, there is a major uncertainty in the electrical power produced by the wind, which causes complexities in the utilization and management of wind energy sources. [4] The changes in weather conditions depending on time and location also create uncertainty in managing the supply-demand balance controlled by the grid operators. [5] In cases where the electrical energy produced by wind power plants is insufficient, auxiliary energy sources provide operational support to the electric grid. [6] Ensuring the supply-demand balance in the electricity grid is also an important condition for the electrical power quality and energy supply in the transmission system, and wind power plant operators care about the follow-up of wind power in terms of economy, operation, and planning. [7] For this, the presence of wind power forecasting (WPF) is an essential factor in the optimization of wind power plants. [8] For consumers to use electrical energy uninterruptedly, efficiently, and economically, wind power plant operators need to estimate the generated electrical energy smoothly. [9] The smooth estimation of electrical power generated by wind turbines increases the operational efficiency for system maintenance, planning, investment, and energy traders. [10,11] It is a precious procedure for electrical grids to provide a respectable commercial yield on the electrical energy market. [12] The capability of advanced WPF provides the contributions like balancing the power system and mitigation of penalties, scheduling the maintenance of wind power plants, investment regarding site location, and technoeconomic and socioeconomic benefits. [13,14] In this way, it is possible to reduce the energy cost and obtain high revenue in the energy market as a result of the contributions obtained for wind power generation systems. [15]

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ARVIN converter: a bidirectional DC/DC converter for grid-connected G2V/V2G energy storage and electrification approaches

Ertekin

2024

Electr Eng

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Analysis of bidirectional 15 MW current source DC/DC converter for series-connected superconducting-based 1 GW/100 kV offshore wind farm

Cited by 5 publications

References 26 publications

Optimisation of topology, rating, control and insulation coordination of a large series–parallel DC windfarm

Optimisation of topology, rating, control and insulation coordination of a large series–parallel DC windfarm

A Review on Wind Power Forecasting Regarding Impacts on the System Operation, Technical Challenges, and Applications

ARVIN converter: a bidirectional DC/DC converter for grid-connected G2V/V2G energy storage and electrification approaches

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