Large Scale Renewable Power Generation

Hossain, Jahangir; Mahmud, Apel

doi:10.1007/978-981-4585-30-9

Cited by 28 publications

(7 citation statements)

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“…Although this proposal simplifies the short-circuit calculations significantly, it seems unlikely that the CBDG can provide a steady state short-circuit current of 2 pu. In [20], short-circuit simulations on type 4 wind turbines (full-conversion AC-AC wind turbines) were performed. The results illustrate that at fault initiation, there is a transient current peak reaching values up to 1.6 pu after which the current drops to steady state in less than one cycle.…”

Section: Fault Current Contribution Of Cbdgsmentioning

confidence: 99%

Modelling fault behaviour of power electronic converters

Baeckeland

Herteleer

Kleemann

2020

International Journal of Electrical Power & Energy Systems

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Renewable energy sources primarily employ power electronic converters to deliver their energy to the grid. These converter-based distributed generators (CBDGs) have a fault behaviour different from conventional generators, capable of compromising the reliability of traditional protection schemes. This paper investigates the fault behaviour of CBDGs by presenting both an analytical steady state model and a numerical transient simulation model developed in MATLAB/Simulink. Using these models, the impact of grid code requirements regarding reactive current injection during faults is analyzed. The results underline that different modelling techniques can support the design of grid codes.

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Section: Fault Current Contribution Of Cbdgsmentioning

confidence: 99%

Modelling fault behaviour of power electronic converters

Baeckeland

Herteleer

Kleemann

2020

International Journal of Electrical Power & Energy Systems

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“…Multilevel converters have been proposed and used to overcome some of the previously discussed problems [12,[19][20][21][22][23]. Multilevel converters show interesting features like direct integration to the MV grid if a suitable number of levels are applied; therefore, this converter could be considered a transformer-less converter for MV-grid integration [11,24,25]. Due to the high number of levels in a staircase form, the waveform in the converter's output is closer to a sinusoidal signal; this implies that the THD could be minimal [10,25,26].…”

Section: Introductionmentioning

confidence: 99%

“…Multilevel converters show interesting features like direct integration to the MV grid if a suitable number of levels are applied; therefore, this converter could be considered a transformer-less converter for MV-grid integration [11,24,25]. Due to the high number of levels in a staircase form, the waveform in the converter's output is closer to a sinusoidal signal; this implies that the THD could be minimal [10,25,26]. The two formers features can be achieved without using high-rated voltage switches; in other words, to achieve the MV levels and a low THD, commercial switches can be implemented [10].…”

Section: Introductionmentioning

confidence: 99%

A Cascaded DC-AC-AC Grid-Tied Converter for PV Plants with AC-Link

et al. 2021

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Cascaded multilevel converters based on medium-frequency (MF) AC-links have been proposed as alternatives to the traditional low-voltage inverter, which uses a bulky low-frequency transformer step-up voltage to medium voltage (MV) levels. In this paper, a three-phase cascaded DC-AC-AC converter with AC-link for medium-voltage applications is proposed. Three stages integrate each DC-AC-AC converter (cell): a MF square voltage generator; a MF transformer with four windings; and an AC-AC converter. Then, k DC-AC-AC converters are cascaded to generate the multilevel topology. This converter’s topological structure avoids the per-phase imbalance; this simplifies the control and reduces the problem only to solve the per-cell unbalance. Two sets of simulations were performed to verify the converter’s operation (off-grid and grid-connected modes). Finally, the papers present two reduced preliminary laboratory prototypes, one validating the cascaded configuration and the other validating the three-phase configuration.

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“…For the probabilistic approach, historical measurements, theoretical modelling or synthetic profiles can be considered to calculate the probability density function of input variables (Soroudi, 2014).…”

Section: Introductionmentioning

confidence: 99%

Probabilistic Power Flow Analysis Based on Point-Estimate Method for High Penetration of Photovoltaic Generation in Electrical Distribution Systems

Luis

John

2020

Anais Do Congresso Brasileiro De Automática 2020

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Environmental awareness and energy policies led to decarbonization targets, fostering the adoption of distributed energy resource in the distribution network. Particularly, photovoltaic systems have been gaining momentum due to cost-competitive option and financial benefits. However, traditional distribution networks were not designed for intermittency in power generation. This poses technical issues such as reverse power flow, overvoltage, and thermal overloading. Furthermore, the growth in intermittency and variability of distributed energy resources increases the uncertainty, hence, it brings challenges for the operation, planning, and investment decisions. In this context, probabilistic methods to cater for these uncertainties are essential to address this issue. This paper presents a probabilistic power flow method based on point estimate method combined Edgeworth expansion for high penetration of photovoltaic generation in distribution networks. Normal distribution and Beta distribution are considered for load and solar irradiation modelling, respectively. The method is assessed for different cases using the IEEE 33-bus distribution test system with photovoltaic systems installation. The point estimate method combined Edgeworth expansion provided satisfactory results with lower computational effort and high fitting accuracy of statistical information compared to Monte Carlo simulation.

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Large Scale Renewable Power Generation

Cited by 28 publications

References 0 publications

Modelling fault behaviour of power electronic converters

Modelling fault behaviour of power electronic converters

A Cascaded DC-AC-AC Grid-Tied Converter for PV Plants with AC-Link

Probabilistic Power Flow Analysis Based on Point-Estimate Method for High Penetration of Photovoltaic Generation in Electrical Distribution Systems

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