Reactive Power Control Method for the LCC Rectifier Side of a Hybrid HVDC System Exploiting DC Voltage Adjustment and Switched Shunt Device Control

2020 ◽  
Vol 35 (3) ◽  
pp. 1575-1587
Author(s):  
Gyu-Sub Lee ◽  
Do-Hoon Kwon ◽  
Seung-Il Moon ◽  
Pyeong-Ik Hwang
Keyword(s):  
Power Control ◽  
Reactive Power ◽  
Control Method ◽  
Reactive Power Control ◽  
Dc Voltage ◽  
Hvdc System

A Reactive Power Control Strategy Based on Power Correction in the Process of Voltage Restoring

2014 ◽  
Vol 705 ◽  
pp. 225-231
Author(s):  
De Hui Peng ◽  
Peng Fei Cui ◽  
Zhen Wang
Keyword(s):  
Power Control ◽  
Control Strategy ◽  
Reactive Power ◽  
Power Converter ◽  
Functional Test ◽  
Power Correction ◽  
Reactive Power Control ◽  
Dc Voltage ◽  
Voltage Mode ◽  
Hvdc System

For the defect Guizhou-Guangdong II ± 500kV HVDC System can not configure filter in accordance with the voltage-mode, which may lead to excessive voltage of AC system, even appear cutting filter due to AC voltage limiting. This paper presents a power adjusting strategy in the process of voltage recovering, based on the character that consume of reactive power converter valve changes with DC voltage. With dynamic functional test and system test, the strategy cuts filter rationally, solving the overvoltage problem of AC system in the process of voltage recovering. It also simplifies the reactive power control strategy.

Design, Control, and Modeling of a New Voltage Source Converter for HVDC System

2013 ◽  
Vol 14 (2) ◽  
pp. 123-138
Author(s):  
Madhan Mohan ◽  
Bhim Singh ◽  
Bijaya Ketan Panigrahi
Keyword(s):  
Power Control ◽  
Fundamental Frequency ◽  
Reactive Power ◽  
Control Method ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Reactive Power Control ◽  
Hvdc System ◽  
Active And Reactive Power ◽  
The Dead

Abstract: A New Voltage Source Converter (VSC) based on neutral clamped three-level circuit is proposed for High Voltage DC (HVDC) system. The proposed VSC is designed in a multipulse configuration. The converter is operated by Fundamental Frequency Switching (FFS). A new control method is developed for achieving all the necessary control aspects of HVDC system such as independent real and reactive power control, bidirectional real and reactive power control. The basic of the control method is varying the pulse width and by keeping the dc link voltage constant. The steady state and dynamic performances of HVDC system interconnecting two different frequencies network are demonstrated for active and reactive power control. Total number of transformers used in this system are reduced to half in comparison with the two-level VSCs for both active and reactive power control. The performance of the HVDC system is improved in terms of reduced harmonics level even at fundamental frequency switching. The harmonic performance of the designed converter is also studied for different value of the dead angle (β), and the optimized range of the dead angle is achieved for varying reactive power requirement. Simulation results are presented for the designed three level multipulse voltage source converters with the proposed control algorithm.

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