Liang X | Author | SciTechnol | Journal of Electrical Engineerin

Liang X Author

tek.lie@aut.ac.nz + 64 9 921 9999 | + 64 9 921 9

Subjects of specialization
Harmonic attenuation, LCL filter

Affiliation
Department of Electrical and Electronic Engineering, Auckland University of Technology, Auckland, New Zealand

Biography

The recent rise in renewable energy sources has brought with it a corresponding rise in the utilization of Voltage Source Converters (VSCs). These typically contain a Pulse Width Modulation (PWM) switched element that can introduce harmonics into the power grid, resulting in equipment damage and failure. In order to suppress excessive harmonics and improve performance, various lowpass filters are inserted between the VSC and grid.

Publications

Research Article Open Access

Development of 45W Q-band Space Qualified TWTs

Author(s):

Qu B, Liang X, Guo C, Shang Y and Feng J

Beijing Vacuum Electronics Research Institute (BVERI) has developed a series of Ka band space traveling wave tubes (TWTs) with saturation power of 12-100 W and efficiency of 55-63% for data transmission and communication for both conduction and radiation cooling. Recently Q-band space TWTs with conduction-cooled and space qualified are developed which are capable of delivering over 45W saturated RF power with overall efficiency exceeding 45%. This paper gives the main technical characteristics of Q-band space TWTs’ design, performances and qualification tests over 5.5 GHz bandwidth.

DOI: 10.4172/2325-9833.1000170

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