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Articoli di riviste sul tema "Medium Voltage DC"

Autore: Grafiati

Pubblicato: 19 ottobre 2024

Ultima modifica: 31 luglio 2025

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1

Vaishnavi, Gatla, C. Venkatesh, Madikonda Rumitha, and Abhishek Shanmukhan. "Single-Input Dual-Output Three-Level DC–DC Converter for EV." International Journal of Advance Research and Innovation 10, no. 1 (2022): 48–53. http://dx.doi.org/10.51976/ijari.1012208.

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This paper presents the development of a non-isolated single-input dual-output three-level dc–dc converter (SIDO-TLC) appropriate for medium- and high-voltage applications. 3 level Buck-Boost converter is used in order to achieve the controllable output voltages. The main merits of this project include reducing voltage stress across semiconductor devices, improving efficiency, and reducing passive components size. This converter shows very good stability, even under simultaneous step changes of the loads and input voltage. Simulation analysis of converter output voltages for various duty cycle

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2

Kim, Minseung, Donghee Choi, and Soo Hyoung Lee. "A DCM-Based Non-Isolated Step-Down DC Transformer." Energies 17, no. 4 (2024): 940. http://dx.doi.org/10.3390/en17040940.

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DC transformers have emerged as essential devices for medium voltage DC (MVDC)-low voltage DC (LVDC) distribution systems. However, conventional step-down single-level converters have limits on the voltage level of the MVDC-LVDC distribution system. This paper proposes a non-isolated step-down (NISD) DC transformer based on discontinuous conduction mode (DCM). The proposed structure can withstand high voltage levels by sharing voltages between energy storage modules dividing voltage levels. The proposed NISD DC transformer determines operational modes based on energy storage modules and perfor

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3

Du, Sixing, Bin Wu, Kai Tian, David Xu, and Navid R. Zargari. "A Novel Medium-Voltage Modular Multilevel DC–DC Converter." IEEE Transactions on Industrial Electronics 63, no. 12 (2016): 7939–49. http://dx.doi.org/10.1109/tie.2016.2542130.

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4

Lin, Bor-Ren. "Soft Switching DC Converter for Medium Voltage Applications." Electronics 7, no. 12 (2018): 449. http://dx.doi.org/10.3390/electronics7120449.

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A dc-dc converter with asymmetric pulse-width modulation is presented for medium voltage applications, such as three-phase ac-dc converters, dc microgrid systems, or dc traction systems. To overcome high voltage stress on primary side and high current rating on secondary side, three dc-dc circuits with primary-series secondary-parallel structure are employed in the proposed converter. Current doubler rectifiers are used on the secondary side to achieve low ripple current on output side. Asymmetric pulse-width modulation is adopted to realize soft switching operation for power switches for wide

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Afridi, Muhammad Danial. "Isolated Cascaded DAB DC-DC Converter to Boost Medium DC Voltage to HVDC." Volume 21, Issue 1 21, no. 1 (2023): 1–6. http://dx.doi.org/10.52584/qrj.2101.01.

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The offshore wind farms typically use ac system to collect power from each generator, with the voltage increased by means of high, heavy step-up transformers. DC collection grids have also recently been taken into consideration as solution to simplify and minimize the offshore windfarm platforms. DC collection grids offer an additional method to reduce complexity of offshore windfarms. However, to increase the DC voltage for HVDC transmission requires the development of high-power and high voltage converters, which presents a technical challenge. This research makes use of an isolated cascaded

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6

Li, Zhenqiang, Huiwen He, Lei Wang, Le Gao, Min Zhang, and Rui Fan. "A comprehensive evaluation method of DC voltage sag in medium-low medium–low voltage DC distribution system." Energy Reports 8 (November 2022): 345–56. http://dx.doi.org/10.1016/j.egyr.2022.10.140.

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7

Zheng, Shaoduo, and Feng Lyu. "Compact Medium Voltage DC/DC Converter Using Series-Connected Power Devices." Electronics 9, no. 6 (2020): 1024. http://dx.doi.org/10.3390/electronics9061024.

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Medium voltage (MV) DC/DC converters are key equipment for interconnection between DC power lines with different voltage levels in MVDC grids. The Input-series-output-parallel (ISOP) modular MV DC/DC converter is feasible to realize MV to low voltage (LV) conversion. However, a large number of LV modules in the converter may reduce the reliability and increase the complexity. This letter proposes a phase-shifted full-bridge MV DC/DC converter using series-connected power devices as switching modules. The converter is of low cost, simple structure, compact volume, and high reliability because t

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8

Huang, Ming. "A Non-Isolated DC-DC Modular Multilevel Converter with Proposed Middle Cells." Electronics 11, no. 7 (2022): 1135. http://dx.doi.org/10.3390/electronics11071135.

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Unlike the modular multilevel converter (MMC) topology operated under the rectifier or inverter modes, control of the balanced state for the submodule (SM) capacitor voltage has emerged as the key issue for DC-DC MMCs. This is mainly caused by no balanced alternative powers being used for balancing SM capacitor voltages, which can be absorbed from the input or output DC sides of the converter. Typically, the alternative voltages and currents should be injected to achieve SM capacitor voltage balance in the DC-DC MMC. However, this solution is based on the cost of adopting the bulky LC filter c

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9

Simiyu, Patrobers, Ai Xin, Kunyu Wang, George Adwek, and Salman Salman. "Multiterminal Medium Voltage DC Distribution Network Hierarchical Control." Electronics 9, no. 3 (2020): 506. http://dx.doi.org/10.3390/electronics9030506.

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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 i

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10

Alsokhiry, Fahad, and Grain Philip Adam. "Multi-Port DC-DC and DC-AC Converters for Large-Scale Integration of Renewable Power Generation." Sustainability 12, no. 20 (2020): 8440. http://dx.doi.org/10.3390/su12208440.

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Numerous research studies on high capacity DC-DC converters have been put forward in recent years, targeting multi-terminal medium-voltage direct current (MVDC) and high-voltage direct current (HVDC) systems, in which renewable power plants can be integrated at both medium-voltage (MV) and high-voltage (HV) DC and AC terminals; hence, leading to complex hybrid AC-DC systems. Multi-port converters (MPCs) offer the means to promote and accelerate renewable energy and smart grids applications due to their increased control flexibilities. In this paper, a family of MPCs is proposed in order to act

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11

Wan, Dai, Qianfan Zhou, Xujin Duan, Jiran Zhu, Junhao Li, and Hengyi Zhou. "A High-Power Density DC Converter for Medium-Voltage DC Distribution Networks." Electronics 12, no. 18 (2023): 3975. http://dx.doi.org/10.3390/electronics12183975.

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A DC converter is the core equipment of voltage conversion and power distribution in a DC distribution network. Its operating characteristics have a profound impact on the flexible regulation of distributed resources in an active distribution network. It is challenging for the existing single-stage conversion topology to meet the requirements of distributed renewable energy connected to a multi-voltage level, medium-voltage grid. It is necessary to study the multistage transform power unit topology further, which can satisfy high reliability, high efficiency, and wide input range. This paper p

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12

Liang, Chonggan, Xinran Guo, Hongxing Wang, et al. "A hybrid full-bridge three-level DC-DC converter with crossing auxiliary capacitors." Journal of Physics: Conference Series 2360, no. 1 (2022): 012026. http://dx.doi.org/10.1088/1742-6596/2360/1/012026.

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This paper presents a high-power medium-frequency hybrid full-bridge (FB) three-level (TL) DC-DC converter with crossing auxiliary capacitors. In this converter, two auxiliary capacitors are deployed between phases a and b, replacing the flying capacitor. The converter’s three-level leg switches are with low voltage stress, while the two-level leg switches are with high voltage stress. The topology and modulation method, as well as the switching characteristics of the hybrid FBTL DC-DC converter with crossing auxiliary capacitors are described. The feasibility and performance of the above-ment

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13

Lian, Yiqing, Stephen J. Finney, Derrick Holliday, and Grain P. Adam. "Medium-voltage DC/DC converter for offshore wind collection grid." IET Renewable Power Generation 10, no. 5 (2016): 651–60. http://dx.doi.org/10.1049/iet-rpg.2015.0376.

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14

Verdicchio, Andrea, Philippe Ladoux, Herve Caron, and Christian Courtois. "New Medium-Voltage DC Railway Electrification System." IEEE Transactions on Transportation Electrification 4, no. 2 (2018): 591–604. http://dx.doi.org/10.1109/tte.2018.2826780.

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15

Ardhenta, Lunde, and Ramadhani Kurniawan Subroto. "Application of direct MRAC in PI controller for DC-DC boost converter." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 2 (2020): 851. http://dx.doi.org/10.11591/ijpeds.v11.i2.pp851-858.

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<p>Almost all electronic components require a DC power supply at present days. The needs of DC power supplies from low voltage scales, medium voltages such as generators, to high voltage scales for high voltage electricity transmission. The improvement of PI controller performances is presented in this paper. The adaptation gains improve transient response of DC-DC Boost Converter several operating conditions. Massachusetts Institute of Technology (MIT) rule is applied as an adaptive mechanism to determine the optimal control parameters in some conditions. The used adaptive control techn

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16

Lunde, Ardhenta, and Kurniawan Subroto Ramadhani. "Application of direct MRAC in PI controller for DC-DC boost converter." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 2 (2020): 851–58. https://doi.org/10.11591/ijpeds.v11.i2.pp851-858.

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Almost all electronic components require a DC power supply at present days. The needs of DC power supplies from low voltage scales, medium voltages such as generators, to high voltage scales for high voltage electricity transmission. The improvement of PI controller performances is presented in this paper. The adaptation gains improve transient response of DC-DC Boost Converter several operating conditions. Massachusetts Institute of Technology (MIT) rule is applied as an adaptive mechanism to determine the optimal control parameters in some conditions. The used adaptive control technique is D

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17

Steffen, Jonas, Sebastian Lengsfeld, Marco Jung, et al. "Design of a Medium Voltage Generator with DC-Cascade for High Power Wind Energy Conversion Systems." Energies 14, no. 11 (2021): 3106. http://dx.doi.org/10.3390/en14113106.

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This paper shows a new concept to generate medium voltage (MV) in wind power application to avoid an additional transformer. Therefore, the generator must be redesigned with additional constraints and a new topology for the power rectifier system by using multiple low voltage (LV) power rectifiers connected in series and parallel to increase the DC output voltage. The combination of parallel and series connection of rectifiers is further introduced as DC-cascade. With the resulting DC-cascade, medium output voltage is achieved with low voltage rectifiers and without a bulky transformer. This a

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18

He, Xiaokun, Renjie Hu, and Wu Chen. "A Hybrid Three-Level ZVZCS Converter for Photovoltaic Power Connecting to MVDC Collection System." Energies 15, no. 15 (2022): 5365. http://dx.doi.org/10.3390/en15155365.

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Compared with the medium voltage ac (MVAC) collection system, the medium voltage dc (MVDC) one for renewable energy sources has many advantages. High-power dc/dc converters are one of the key stages of the MVDC collection system to boost the voltage generated by photovoltaic or wind turbine. A novel hybrid three-level dc/dc converter utilizing a blocking capacitor to realize zero-voltage zero-current-switching (ZVZCS) is proposed. A higher overall efficiency can be achieved by reducing conduction losses. Detailed experimental results on a scaled-down hardware prototype rated at 150 V/750 V/1 k

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19

Chen, Yangfan, and Yu Zhang. "DC Transformers in DC Distribution Systems." Energies 16, no. 7 (2023): 3031. http://dx.doi.org/10.3390/en16073031.

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With the rapid development of power electronics technology and its successful application, many demonstration projects of medium/low-voltage DC (M-LVDC) distribution systems have been constructed. The DC transformer (DCT) is the key equipment in the M-LVDC distribution system for interconnecting the MVDC and LVDC buses. In this paper, the characteristics of DCTs are summarized. The existing topologies of DCTs are analyzed, and the relevant control strategies are researched, including steady-state control, transient control, and cascaded control. The engineering application examples of DCTs are

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20

Kolahian, Pouya, Hadi Tarzamni, Amir Nikafrooz, and Mohsen Hamzeh. "Multi‐port DC–DC converter for bipolar medium voltage DC micro‐grid applications." IET Power Electronics 12, no. 7 (2019): 1841–49. http://dx.doi.org/10.1049/iet-pel.2018.6031.

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21

Liu, Jian Ye, and Jiao Ni. "Design of a High-Voltage Signal Generator Applied Flashover Fault Detection." Applied Mechanics and Materials 734 (February 2015): 930–34. http://dx.doi.org/10.4028/www.scientific.net/amm.734.930.

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For cable flashover failure, a signal generator design ideas of the NC DC high flash - DC medium voltage flash - low-voltage flash based on three pulse method, consists of three components: the DC source, medium-high pressure unit and low pressure unit. DC source adopts AC 220V power supply, after rectification, chopping booster output. The output of the DC source through an inverter and high-frequency boost get the high-voltage unit. Low unit through the high-speed switching devices and capacitor charging and discharging achieve nanosecond pulse generation. In this paper, the various aspects

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22

D.Srinivasa Rao & Dr. Anupama A. Deshpande. "DAB Based DC-DC High Frequency Link PET for Interconnecting MVDC-LVDC Grids." International Journal for Modern Trends in Science and Technology 7, no. 05 (2021): 165–71. http://dx.doi.org/10.46501/ijmtst0705028.

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This paper proposes dual active bridge (DAB) based high frequency power electronic transformer (PET) for interconnecting medium voltage dc (MVDC) and low voltage dc (LVDC) grids for dc power distribution. The above proposed concept works on dual active phase shift principle and square wave HF modulation technique for bidirectional power transfer. Compared to the traditional dc transformer scheme, The proposed power electronic transformer (PET) can disconnect from LVDC distribution grid effectively as a dc breaker when a short circuit fault occurs in the distribution grid. The isolated DC-DC PE

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23

Ismail, Ali Ahmed Adam, and A. Elnady. "Design and implementation of multilevel non-isolated DC-DC converter for variable DC voltage source." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 2 (2021): 994. http://dx.doi.org/10.11591/ijpeds.v12.i2.pp994-1005.

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<span lang="EN-US">In this paper, a non-isolated multi-level DC-DC (MLDC-DC) smooth buck converter with the LC filter is designed and analyzed. The presented topology can be used in low or medium voltage levels in several applications that use DC storage elements. The use of the proposed multilevel converter topology reduces the voltage stress across the power converter switching elements and facilitates the voltage rating of the switches. The designed LC filter for the multilevel converter is characterized by a small inductor size, which reduces the traditional bulky inductor used in th

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Ali, Ahmed Adam Ismail, and Elnady A. "Design and implementation of multilevel non-isolated DC-DC converter for variable DC voltage source." International Journal of Power Electronics and Drive System (IJPEDS) 12, no. 2 (2021): 994–1005. https://doi.org/10.11591/ijpeds.v12.i2.pp994-1005.

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In this paper, a non-isolated multi-level DC-DC (MLDC-DC) smooth buck converter with the LC filter is designed and analyzed. The presented topology can be used in low or medium voltage levels in several applications that use DC storage elements. The use of the proposed multilevel converter topology reduces the voltage stress across the power converter switching elements and facilitates the voltage rating of the switches. The designed LC filter for the multilevel converter is characterized by a small inductor size, which reduces the traditional bulky inductor used in the output of the tradition

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25

Espinosa, Eduardo, Pedro Melín, Carlos Baier, José Espinoza, and Hugo Garcés. "An Efficiency Analysis of 27 Level Single-Phase Asymmetric Inverter without Regeneration." Energies 14, no. 5 (2021): 1459. http://dx.doi.org/10.3390/en14051459.

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For medium voltage applications, multilevel inverters are used. One of its classic topologies is the Cascaded H-Bridge, which requires isolated DC voltages to work. Depending on the DC voltage ratio used in the Cascaded H-bridge can be classified into symmetric and asymmetric. In comparison between symmetric and asymmetric inverters, the latter can generate an AC output voltage with more output voltage levels. DC voltage ratio most documented are binary and trinary. The last can generate an AC voltage of 3n = 27 levels is obtained, using n = 3 inverters in cascade and NLM modulation, which gen

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26

ZHANG, Lu, Ying CHEN, Chen SHEN, Wei TANG, and Jun LIANG. "Coordinated voltage regulation of hybrid AC/DC medium voltage distribution networks." Journal of Modern Power Systems and Clean Energy 6, no. 3 (2017): 463–72. http://dx.doi.org/10.1007/s40565-017-0324-x.

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Monadi, Mehdi, Catalin Gavriluta, Alvaro Luna, Jose Ignacio Candela, and Pedro Rodriguez. "Centralized Protection Strategy for Medium Voltage DC Microgrids." IEEE Transactions on Power Delivery 32, no. 1 (2017): 430–40. http://dx.doi.org/10.1109/tpwrd.2016.2600278.

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28

Wang, Li, Qianlai Zhu, Wensong Yu, and Alex Q. Huang. "A Medium-Voltage Medium-Frequency Isolated DC–DC Converter Based on 15-kV SiC MOSFETs." IEEE Journal of Emerging and Selected Topics in Power Electronics 5, no. 1 (2017): 100–109. http://dx.doi.org/10.1109/jestpe.2016.2639381.

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Ngo, Minh Nhut, Philippe Ladoux, Jérémy Martin, and Sébastien Sanchez. "Silicium-Carbide-Based Isolated DC/DC Converter for Medium-Voltage Photovoltaic Power Plants." Energies 15, no. 3 (2022): 1038. http://dx.doi.org/10.3390/en15031038.

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The production of large-scale photovoltaics (PVs) is becoming increasingly popular in the field of power generation; they require the construction of power plants of several hundred megawatts. Nevertheless, the construction of these PV power plants with conventional low-voltage (LV) conversion systems is not an appropriate technological path. Particularly, large cross-section cables, a high quantity of semiconductors, and the bulky layout of 50/60-Hz step-up transformers make the PV system less competitive in terms of energy efficiency and cost. To overcome these drawbacks, this paper introduc

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Yang, Jinggang, Jianhua Wang, Xiaokuan Jin, Shuo Li, Xiaolong Xiao, and Zaijun Wu. "Admittance Criterion of Medium-Voltage DC Distribution Power System and Corresponding Small Signal Stability Analysis." World Electric Vehicle Journal 14, no. 9 (2023): 235. http://dx.doi.org/10.3390/wevj14090235.

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Aiming at the stability of a medium-voltage DC network based on a modular multilevel converter (MMC), this paper proposes an admittance stability criterion considering the influence of current-limiting inductors at the medium voltage side, which prevents the complex products and matrix calculations of traditional criteria. The DC admittance model DC transformers (DCTs) under different working modes are then established based on Thevenin/Norton equivalent circuit methods to analyze the stability of the DC system based on the proposed admittance stability criterion, which proves that the voltage

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31

Liu, Dong, Fujin Deng, and Zhe Chen. "Five-Level Active-Neutral-Point-Clamped DC/DC Converter for Medium-Voltage DC Grids." IEEE Transactions on Power Electronics 32, no. 5 (2017): 3402–12. http://dx.doi.org/10.1109/tpel.2016.2585618.

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Elserougi, Ahmed A., Ahmed M. Massoud, Ibrahim Abdelsalam, and Shehab Ahmed. "Self-balanced non-isolated hybrid modular DC–DC converter for medium-voltage DC grids." IET Generation, Transmission & Distribution 12, no. 15 (2018): 3626–36. http://dx.doi.org/10.1049/iet-gtd.2017.1813.

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Sobanski, Piotr, Milosz Miskiewicz, Grzegorz Bujak, Marcin Szlosek, Nikolaos Oikonomou, and Kai Pietilaeinen. "Real Time Simulation of Power Electronics Medium Voltage DC-Grid Simulator." Energies 14, no. 21 (2021): 7368. http://dx.doi.org/10.3390/en14217368.

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Power electronics medium-voltage (MV) systems must comply with the requirements defined in grid codes. These systems’ compatibility with the standards can be validated by specialized testing equipment: grid simulators. This paper presents a hardware in the loop (HiL) implementation and the simulation results of a MV multiphase DC/DC converter designed for MV DC grid emulation. By using ABB’s reliable, patented power converter hardware topology (US 10978948 B2) and by applying advanced control algorithms, the presented system can be used for special purposes, such as the emulation of fault even

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Vorperian, Vatche. "Synthesis of Medium Voltage dc-to-dc Converters From Low-Voltage, High-Frequency PWM Switching Converters." IEEE Transactions on Power Electronics 22, no. 5 (2007): 1619–35. http://dx.doi.org/10.1109/tpel.2007.904170.

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Barrios, Manuel A., Víctor Cárdenas, Jose M. Sandoval, Josep M. Guerrero, and Juan C. Vasquez. "A Cascaded DC-AC-AC Grid-Tied Converter for PV Plants with AC-Link." Electronics 10, no. 4 (2021): 409. http://dx.doi.org/10.3390/electronics10040409.

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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 topo

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Lu, Zhebie, Chengmin Li, Ankang Zhu, et al. "Medium Voltage Soft-Switching DC/DC Converter With Series-Connected SiC MOSFETs." IEEE Transactions on Power Electronics 36, no. 2 (2021): 1451–62. http://dx.doi.org/10.1109/tpel.2020.3007225.

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Ma, Dajun. "Multiport AC-AC-DC Converter for SNOP With One Medium-Frequency Transformer." CPSS Transactions on Power Electronics and Applications 7, no. 4 (2022): 374–85. http://dx.doi.org/10.24295/cpsstpea.2022.00034.

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With the access of increased renewable energy sources, the conventional AC distribution network is hard to flexibly adjust the line voltage and power flow. Therefore, the soft normally open point (SNOP) is applied to increase the flexibility of AC distribution network. The existing converters for SNOP use many submodules (SMs) and passive components, which have the poor economy. On this basis, a multiport AC-AC-DC converter for SNOP with one medium-frequency transformer (MFT) is proposed in this paper. The proposed multiport AC-AC-DC converter is based on the back-to-back (BTB) cascaded H-brid

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Roy, Shalini, and Rahul Pandey. "High Conversion Ratio Converter Using Half-Bridge Sub-Modules." International Journal of Engineering Technology and Management Sciences 4, no. 5 (2020): 110–15. http://dx.doi.org/10.46647/ijetms.2020.v04i05.020.

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An appreciable and significant assess of consideration and mindset is currently growing up for power dc-dc converters and its further more consideration is taken towards adoption of Modular-Multilevel Converters (MMC). The paper presents a transformer less MMC by the means of superior and advanced conversion ratio for higher dc-dc power conversion. This converter is being capable of utilized mutually for both the Medium Voltage Direct Current (MVDC) transmission systems and High Voltage Direct Current (HVDC) transmission systems, due to its some remarkable distinctive attributes such as modula

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ElMenshawy, Mena, and Ahmed Massoud. "Medium-Voltage DC-DC Converter Topologies for Electric Bus Fast Charging Stations: State-of-the-Art Review." Energies 15, no. 15 (2022): 5487. http://dx.doi.org/10.3390/en15155487.

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With the expansion of E-mobility technology, the demand for Medium-Voltage (MV) Electric Buses (E-buses) charging infrastructure has significantly increased. In this regard, the effective connection of E-bus chargers to a medium voltage power grid is essential to provide fast charging and carry out multiple charging processes simultaneously. One of the main building blocks for E-bus charging is the DC-DC converter stage responsible for regulating the power flow and matching the different voltage and power levels. Accordingly, this paper presents a comprehensive review of DC-DC converter topolo

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Tapre, Pawan C., Mohan P. Thakre, Ramesh S. Pawase, et al. "New control scheme for a dynamic voltage restorer based on selective harmonic injection technique with repetitive controller." Bulletin of Electrical Engineering and Informatics 13, no. 3 (2024): 2109–21. http://dx.doi.org/10.11591/eei.v13i3.5312.

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Repetitive controller and selective harmonic injection technique (SHI) in medium and low voltage distribution networks improve dynamic voltage restorer (DVR) DC bus voltages as well as nullify power quality (PQ) problems. DVRs use sinusoidal pulse width modulation (SPWM) firing control, but DC bus use seems to be limited, affecting density, cost, and power packaging. By adding 1/6th of the 3rd harmonic waveform to the basic waveform, SPWM yields the developed model. According to the findings, 15% of DC bus usage improves and produces high voltage AC. Nevertheless, just control systems perturb

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Das, J. C., and R. H. Osman. "Grounding of AC and DC low-voltage and medium-voltage drive systems." IEEE Transactions on Industry Applications 34, no. 1 (1998): 205–16. http://dx.doi.org/10.1109/28.658747.

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42

Wang, Yang, Kunpeng Xia, Molin He, Xiankui Wen, and Xuehan Chen. "A zoning-based distributed control method for medium-low voltage AC/DC distribution networks." Journal of Physics: Conference Series 2896, no. 1 (2024): 012062. https://doi.org/10.1088/1742-6596/2896/1/012062.

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Abstract With the increasing percentage of renewable energy sources and new types of power equipment, the medium-low voltage AC/DC distribution network structure improves the source-load carrying capacity and is considered a prevailing trend. Traditional centralized voltage optimization and control methods face challenges due to computational inefficiencies arising from the numerous control devices involved. In this paper, a distributed optimal control strategy based on distribution network zoning is proposed. Firstly, a network decoupling and multi-agent deployment method based on zoning is i

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Zhang, Ruike, Feng Xu, Ziyue Yang, et al. "Analysis of different test techniques of DC circuit breaker." Journal of Physics: Conference Series 2850, no. 1 (2024): 012002. http://dx.doi.org/10.1088/1742-6596/2850/1/012002.

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Abstract Amidst the escalating demand for energy and the proliferation of renewable energy sources, direct current (DC) systems have garnered increasing interest. As pivotal for the safety and reliability of DC systems, testing DC circuit breakers is a critical step to evaluate their performance and dependability. This study focuses on the breaking test method for medium and high-voltage DC circuit breakers. It compares and evaluates the current waveform, recovery voltage, and energy dissipation across various test circuit methodologies during the breaking process of DC circuit breakers and as

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Follo, Alessandra, Oscar Saborío-Romano, Elisabetta Tedeschi, and Nicolaos A. Cutululis. "Challenges in All-DC Offshore Wind Power Plants." Energies 14, no. 19 (2021): 6057. http://dx.doi.org/10.3390/en14196057.

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As the size and distance from shore of new offshore wind power plants (OWPPs) increase, connection to shore using high-voltage (HV) direct-current (DC) technology becomes more cost-effective. Currently, every offshore wind power plant has a collection system based on medium-voltage alternating-current technology. Such systems rely on heavy and bulky low-frequency (i.e., 50 or 60 Hz) transformers: a drawback offshore, where equipment weight and space are restricted. Consequently, there is growing interest in medium-voltage direct-current collection systems, in which low-frequency transformers a

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Choi, Hyuntae, Mihai Ciobotaru, Minsoo Jang, and Vassilios G. Agelidis. "Performance of Medium-Voltage DC-Bus PV System Architecture Utilizing High-Gain DC–DC Converter." IEEE Transactions on Sustainable Energy 6, no. 2 (2015): 464–73. http://dx.doi.org/10.1109/tste.2014.2382690.

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46

Wang, Huan, Yu Zhou, Xinke Huang, Yibo Wang, and Honghua Xu. "Topology and Control Strategy of PV MVDC Grid-Connected Converter with LVRT Capability." Applied Sciences 11, no. 6 (2021): 2739. http://dx.doi.org/10.3390/app11062739.

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This paper proposes an isolated buck-boost topology and control strategy for the photovoltaic (PV) medium-voltage DC (MVDC) converter with low-voltage ride through (LVRT) capability. The proposed isolated buck-boost topology operates on either boost or buck mode by only controlling the active semiconductors on the low-voltage side. Based on this topology, medium-voltage (MV) dc–dc module is able to be developed to reduce the number of modules and increase the power density in the converter, which corresponds to the first contribution. As another contribution, a LVRT method based on an LC filte

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47

Burada, Satyanarayana, and Kottala Padma. "Model predictive current control for maximum power point tracking of voltage source inverter based grid connected photovoltaic system." International Journal of Power Electronics and Drive Systems (IJPEDS) 14, no. 3 (2023): 1781. http://dx.doi.org/10.11591/ijpeds.v14.i3.pp1781-1790.

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<p>Due to the high demand of grid connected photovoltaic systems, there is a need to track the maximum power point of the PV system. As the output of PV system is dc, there should be a converter, acting as medium between PV system and dc bus capacitor to track maximum power at all the loads. Usually boost converter is acting as medium between PV system and dc link capacitor as the duty cycle of the insulated-gate bipolar transistor in boost converter is in between 0 to 1 for maximum loads during maximum power point tracking (MPPT). To make PV system stable, the balance point is dc bus. I

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48

Satyanarayana, Burada, and Padma Kottala. "Model predictive current control for maximum power point tracking of voltage source inverter based grid connected photovoltaic system." International Journal of Power Electronics and Drive Systems ( 14, no. 3 (2023): 1781~1790. https://doi.org/10.11591/ijpeds.v14.i3.pp1781-1790.

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Abstract (sommario):

Due to the high demand of grid connected photovoltaic systems, there is a need to track the maximum power point of the PV system. As the output of PV system is dc, there should be a converter, acting as medium between PV system and dc bus capacitor to track maximum power at all the loads. Usually boost converter is acting as medium between PV system and dc link capacitor as the duty cycle of the insulated-gate bipolar transistor in boost converter is in between 0 to 1 for maximum loads during maximum power point tracking (MPPT). To make PV system stable, the balance point is dc bus. If the dc

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49

Abdelkrim, Benali, Khiat Mounir, and Denai Mouloud. "Voltage profile and power quality improvement in photovoltaic farms integrated medium voltage grid using dynamic voltage restorer." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 3 (2020): 1481–90. https://doi.org/10.11591/ijpeds.v11.i3.pp1481-1490.

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Abstract (sommario):

In this paper, we have presented a simulation study to analyze the power quality of three phases medium voltage grid connected with distribution generation (DG) such as photovoltaic (PV) farms and its control schemes. The system uses two-stage energy conversion topology composed of a DC to DC boost converter for the extraction of maximum power available from the solar PV system based on incremental inductance technique and a three-level voltage source inverter (VSI) to connect PV farm to the power grid. To maintain the grid voltage and frequency within tolerance following disturbances such as

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50

Shah, Faisal Mehmood, Sarmad Maqsood, Robertas Damaševičius, and Tomas Blažauskas. "Disturbance Rejection and Control Design of MVDC Converter with Evaluation of Power Loss and Efficiency Comparison of SiC and Si Based Power Devices." Electronics 9, no. 11 (2020): 1878. http://dx.doi.org/10.3390/electronics9111878.

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Abstract (sommario):

With direct current (DC) power generation from renewable sources, as well as the current relocation of loads from alternating current (AC) to DC, medium-voltage DC (MVDC) should fill gaps in the areas of distribution and transmission, thereby improving energy efficiency. The MVDC system is a platform that interconnects electric power generation renewables (solar, wind) with loads such as data centers, industrial facilities and electric vehicle (EV) charging stations (also using MVDC technology). DC–DC power converters are part of the rising technology for interconnecting future DC grids, provi

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