Development of Back-to-Back Flexible HVDC Prototype Based on MMC

2013 ◽  
Vol 397-400 ◽  
pp. 1808-1813
Author(s):  
Cheng Feng ◽  
Da Li Wang ◽  
Jin Li
Keyword(s):  
Circuit Design ◽  
High Power ◽  
Working Condition ◽  
Protection Strategy ◽  
Hvdc System ◽  
Fault Protection ◽  
The World

With the development of flexible HVDC technology in the world, back-to-back HVDC system based on MMC topology have more attention. A high power back-to-back flexible HVDC prototype has been developed to assess performance and reliability of construction of converter valve segment. Valve normal working condition (rated conditions rated voltage, current, temperature), valve transient working condition (temporary overvoltage, overcurrent), valve fault protection and anti-interference ability are accessed. Performance and reliability of control and protection equipment are assessed. The design of control and protection strategy is optimized. The correctness of main circuit design is tested.

scholarly journals HPLSE editorial tribute to Professor David Neely

2021 ◽  
Vol 9 ◽  
Author(s):  
Colin Danson ◽  
Paul McKenna
Keyword(s):  
High Power ◽  
Board Member ◽  
Editorial Board Member ◽  
Early Career ◽  
High Power Laser ◽  
Power Laser ◽  
Science And Engineering ◽  
The World

Abstract David Neely was an internationally recognised scientist who formed collaborations and friendships across the world. His passion for his work always shone through. He always made time for early-career scientists and became a mentor and supervisor to many. He was an active Editorial Board Member of the international journal High Power Laser Science and Engineering. Sadly, David was taken from us much too early. In this Editorial we pay tribute to his work through his publications in the journal.

scholarly journals Research on DC Protection Strategy in Multi-Terminal Hybrid HVDC System

Engineering ◽  
2021 ◽  
Author(s):  
Yuping Zheng ◽  
Jiawei He ◽  
Bin Li ◽  
Tonghua Wu ◽  
Wei Dai ◽  
...  
Keyword(s):  
Protection Strategy ◽  
Hvdc System

Electrical Circuit Design of Fast-Discharge System for High-Power Rare-Gas Halide Lasers

1981 ◽  
Vol 20 (1) ◽  
pp. 129-137 ◽  
Author(s):  
Mitsuo Maeda ◽  
Tsuyoshi Nishitarumizu ◽  
Yasushi Miyazoe
Keyword(s):  
Circuit Design ◽  
High Power ◽  
Electrical Circuit ◽  
Rare Gas ◽  
Discharge System ◽  
Fast Discharge

RESULTS OF THE DRM SIMULCAST FIELD TRIALS IN 87.5-108 MHZ BAND

2021 ◽  
Author(s):  
С.А. СОКОЛОВ ◽  
С.В. МЫШЬЯНОВ ◽  
Ю.А. КОВАЛГИН
Keyword(s):  
Russian Federation ◽  
High Power ◽  
Electromagnetic Compatibility ◽  
Field Trials ◽  
High Power Field ◽  
Transmit Power ◽  
Digital Radio ◽  
Current State ◽  
Radio Broadcasting ◽  
The World

Показано современное состояние цифрового радиовещания в России и в мире. Описаны результаты исследований, проведенных в опытной зоне аналого-цифрового DRM/ЧМ-радиовещания в полосе частот 87,5-108 МГц в Санкт-Петербурге в период с 18 июля 2019 г. по 25 декабря 2020 г. при мощностях аналоговой и цифровой частей передатчика, равных 3000 и 800 Вт соответственно. Приведены результаты оценки электромагнитной совместимости обоих форматов радиовещания. Сформулированы требования, предъявляемые отечественными радиовещателями к системе цифрового радиовещания в диапазоне 87,5-108 МГц, и показано, что аналого-цифровой формат DRM Simulcast соответствует им. The current state of digital radio broadcasting both in Russia and in the world is presented. Digiton Systems LLC carried out a high-power field trial of the DRM system in DRM Simulcast mode by order of the Russian Television and Radio Broadcasting Network (RTRN) in the FM band 87.5-108 MHz in St. Petersburg (Russian Federation) from July 2019 to December 2020. The transmitter was set to radiate at 95.9 MHz FM signal with a transmit power of 3 kW and DRM signal with a transmit power of 800 W simultaneously. The article presents the results of these studies. The results of evaluating the electromagnetic compatibility of FM and DRM broadcasting formats are also described.

GROWTH OF SiC SUBSTRATES

2006 ◽  
Vol 16 (03) ◽  
pp. 751-777 ◽  
Author(s):  
ADRIAN POWELL ◽  
JASON JENNY ◽  
STEPHAN MULLER ◽  
H. McD. HOBGOOD ◽  
VALERI TSVETKOV ◽  
...  
Keyword(s):  
Emerging Markets ◽  
Epitaxial Growth ◽  
High Power ◽  
Significant Fraction ◽  
Current Status ◽  
Microwave Devices ◽  
World Production ◽  
Power Switching ◽  
The World ◽  
The Future

In recent years SiC has metamorphisized from an R&D based materials system to emerge as a key substrate technology for a significant fraction of the world production of green, blue and ultraviolet LEDs. Emerging markets for SiC homoepitaxy include high-power switching devices and microwave devices. Applications for heteroepitaxial GaN-based structures on SiC substrates include lasers and microwave devices. In this paper we review the properties of SiC, assess the current status of substrate and epitaxial growth, and outline our expectations for SiC in the future.

Research of Low Power Design Strategy Based on IEEE 1801 Unified Power Format

2014 ◽  
Vol 981 ◽  
pp. 21-24
Author(s):  
Shu Ping Cui ◽  
Chuang Xie
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Circuit Design ◽  
High Power ◽  
Low Power Design ◽  
Design Strategy ◽  
Design Flow ◽  
Battery Life ◽  
Electronic Systems ◽  
High Power Consumption

Power consumption is becoming an increasingly important aspect of circuit design. High power consumption can lead to high machine temperature, short battery life which makes laptop electronics difficult to be widely used. IEEE 1801 Unified Power Format (UPF) is designed to express power intent for electronic systems and components .This paper first introduces the power principles, puts forward the approaches to reduce power consumption according to UPF, and then demonstrates the Synopsys design flow based on UPF, finally gives the power report and makes a conclusion.

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