Results 11 to 20 of about 178 (97)

Comprehensive optimization framework for transmission expansion planning with fractional frequency transmission system

IET Generation, Transmission & Distribution, 2023
The Fractional Frequency Transmission System (FFTS) operates with low frequency to decrease the electrical length of AC transmission lines, consequently enhancing transmission capacity.
Zhongqi Cai, Xiuli Wang, Kun Yang, Sui Peng, Zhaoqin Hu, Likai Zhang, Boyang Zhao   +6 more
doaj   +2 more sources

Circulating Current Control for the Modular Multilevel Matrix Converter Based on Model Predictive Control [PDF]

IEEE Journal of Emerging and Selected Topics in Power Electronics, 2021
In this work, a Continuous-Control-Set Model Predictive Control (CCS-MPC) strategy, with a saturation scheme for protection, is presented for regulating the circulating currents of a Modular Multilevel Matrix Converter (M3C). The proposed scheme is based
Cardenas, Roberto, Clare, Jon C., Urrutia, Matias, Watson, Alan   +3 more
core   +7 more sources

Design and control of modular multilevel matrix converter with symmetrically integrated energy storage for low frequency AC system

IET Renewable Power Generation
Integrating energy storage units (ESUs) into part of sub‐modules (SMs) enables the decoupling active power control for the modular multilevel matrix converter (M3C).
Yingjie Tang, Zheren Zhang, Zheng Xu
doaj   +2 more sources

Isolated Modular Multilevel Matrix Converter (I-M3C) Based Novel Solid-State Transformer (SST) With Low-Frequency Medium-Voltage AC Port

IEEE Transactions on Power Electronics
This paper proposes a novel solid-state transformer (SST) having a low-frequency medium-voltage AC (LF-MVAC) port distinctively, which can be as the key equipment for smart distribution networks based on LF-MVAC interconnection. The proposed SST has four ports of power-frequency medium-voltage AC (MVAC), LF-MVAC, low-voltage DC (LVDC), and lowvoltage ...
Di Zhu, Zhongchen Pei, Chuang Liu, Jingyue Wang, Dehao Kong, Chao Liu, Yuanxiang Sun, Dongbo Guo, Marcelo Lobo Heldwein   +8 more
openaire   +4 more sources

Vector control of a modular multilevel matrix converter operating over the full output-frequency range [PDF]

IEEE Transactions on Industrial Electronics, 2019
The Modular Multilevel Matrix Converter ( M 3 C ) is an ac-to-ac converter topology suitable for the control of high-power variable-speed drives. The control of this converter is complex, particularly when the two ac system frequencies are similar or ...
Cardenas, Roberto, Clare, Jon C., Diaz, Matias, Espinoza, Mauricio, Hackl, Christoph M., Rojas, Felix, Wheeler, Patrick   +6 more
core   +3 more sources

Harmonic characteristics analysis of modular multilevel matrix converter for fractional frequency transmission system

电力工程技术, 2022
The modular multilevel matrix converter (M3C) is the core equipment for fractional frequency transmission system (FFTS). The AC-AC conversion of M3C leads to direct coupling of the ac electrical quantities at different frequencies,causing complex ...
SUN Yuwei, CHANG Jingtian, FU Chao, GUO Feng, ZHOU Jinghao, GAO Benfeng   +5 more
doaj   +1 more source

Understanding peripherality in a multidimensional geographical, socioeconomic, and institutional context: Evidence from Greece

Regional Science Policy &Practice, Volume 15, Issue 7, Page 1424-1457, September 2023., 2023
Abstract This paper develops a multidimensional methodological framework for examining the geographical handicaps and associated socioeconomic drawbacks of nomenclature of territorial units for statistics (NUTS) III regions in Greece to conceive diverse dimensions of peripherality and target the de‐peripheralization of peripheral regions.
Dimitrios Tsiotas, Vassilis Tselios
wiley   +1 more source

An isolated modular multi‐level AC/AC converter with high‐frequency link and pulse flip circuit for fractional frequency transmission system application

IET Power Electronics, Volume 15, Issue 16, Page 1814-1830, 16 December 2022., 2022
Abstract Based on the modular topology and the traditional voltage‐sourced converter (VSC) model, this paper presents an isolated modular multi‐level AC/AC converter with high‐frequency (HF) link and pulse flip circuit for fractional frequency transmission system (FFTS) application.
Yongqing Meng, Ying Kong, Jin Li, Feng Jia, Xiuli Wang, Xifan Wang   +5 more
wiley   +1 more source

Grid integration and fault ride‐through of fractional frequency offshore wind power system based on Y‐connected modular multilevel converter

IET Generation, Transmission &Distribution, Volume 16, Issue 15, Page 2977-2988, August 2022., 2022
Abstract Fractional frequency transmission is a promising solution to offshore wind power integration. This paper proposes a new grid integration scheme of fractional frequency offshore wind power system (FFOWPS) based on Y‐connected modular multilevel converter (Y‐MMC).
Yongqing Meng, Kang Wu, Feng Jia, Shuhao Yan, Yong Yang, Xiuli Wang   +5 more
wiley   +1 more source

Modeling and Control of Modular Multilevel Matrix Converter for Low-Frequency AC Transmission

Energies, 2023
The modular multilevel matrix converter (M3C) is the core component in low-frequency AC (LFAC) transmission, which is a competitive scheme for offshore wind power integration.
Zheren Zhang, Yanqiu Jin, Zheng Xu
doaj   +1 more source