E3S Web Conf.
Volume 256, 20212021 International Conference on Power System and Energy Internet (PoSEI2021)
|Number of page(s)||7|
|Section||Smart Grid Technology and Power System Regulation Modeling|
|Published online||10 May 2021|
Research on Operating Characteristics of Two-Terminal Flexible Direct Transmission with Improved Deadbeat Control
1 Jiangsu Keneng Electric Power Engineering Cosulting Co. LTD
2 Nanjing Normal University. School of Electrical and Automation Engineering, Nanjing Normal University, Nanjing 210042, China
* Corresponding author’s e-mail: firstname.lastname@example.org
Traditional DC transmission technology has obvious defects in power adjustment speed, loss reduction, protection and control, etc., and it has been unable to meet the diverse needs of electricity consumption. The flexible DC transmission system not only solves the above shortcomings, but also has the advantages of independently controllable power and power supply to passive network. It is widely applied in distributed power generation by new energy, micro grid and other fields. This paper takes the two-terminal flexible DC transmission system as the research object, establishes the mathematical mode of two-terminal flexible DC transmission system, and studies the basic operation mode of the system and the voltage source converter (VSC) control strategy on this basis. Considering the problems of control delay and poor responsiveness of current closed-loop control when the traditional deadbeat control is applied to VSC converters, an improved deadbeat control strategy is proposed to solve the above-mentioned defects by predicting the current sampling at k+2 moment. Finally, the co-simulation is used to verify the correctness and reliability of the above-mentioned method.
© The Authors, published by EDP Sciences, 2021
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