A dynamic model and control strategy for the voltage source converter based HVDC transmission system under fault AC conditions

2009 ◽  
Author(s):  
Yan Wang ◽  
Shu-zhen Zhao ◽  
Cheng Huang-fu ◽  
Jiang-jun Ruan ◽  
Qing-da Meng ◽  
...  
Keyword(s):  
Dynamic Model ◽  
Control Strategy ◽  
Transmission System ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Hvdc Transmission ◽  
And Control

A new voltage source converter-HVDC transmission system based on an inductive filtering method

2011 ◽  
Vol 5 (5) ◽  
pp. 569 ◽  
Author(s):  
Y. Li ◽  
Z.W. Zhang ◽  
C. Rehtanz ◽  
L.F. Luo ◽  
S. Rüberg ◽  
...  
Keyword(s):  
Transmission System ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Filtering Method ◽  
Hvdc Transmission

Modeling and Fault Analysis of VSC-HVDC Supplying Passive Network

2013 ◽  
Vol 732-733 ◽  
pp. 686-690
Author(s):  
Tian Liang Zhao ◽  
Shi Wu Xiao
Keyword(s):  
Coordinate System ◽  
Pulse Width Modulation ◽  
Fault Simulation ◽  
Transmission System ◽  
Simulation Software ◽  
Fault Analysis ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Hvdc Transmission ◽  
Passive Network

VSC-HVDC (high voltage direct current based on voltage source converter) is a new HVDC transmission technology based on voltage source converter. Its converter uses thyristors with the current off capability such as IGBT or GTO. VSC-HVDC system can realize passive inverting by pulse width modulation (PWM) technique. This paper introduced the structure and the operating principle of the VSC-HVDC transmission system. In addition, we studied the mathematical model of the VSC-HVDC transmission system supplying passive network in ABC stable coordinate system and in DQ rotating coordinate system. Lastly, we built the physical model of the VSC-HVDC transmission system based on PSCAD/EMTDC simulation software. We carried on various types of fault simulation and analyzed the simulation result. The result of the paper may provide reference in the further study and application of the VSC-HVDC transmission technology in the future.

scholarly journals Research on Operating Characteristics of Two-Terminal Flexible Direct Transmission with Improved Deadbeat Control

2021 ◽  
Vol 256 ◽  
pp. 01043
Author(s):  
Mei Jianchun ◽  
Qian Junxia ◽  
Zhao Shengjie ◽  
Ma Hongjuan ◽  
Song Pengcheng ◽  
...  
Keyword(s):  
Control Strategy ◽  
Operation Mode ◽  
Electricity Consumption ◽  
Transmission System ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Basic Operation ◽  
Deadbeat Control ◽  
Operating Characteristics ◽  
Loop Control

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.

New Breed of Network Fault-Tolerant Voltage-Source-Converter HVDC Transmission System

2013 ◽  
Vol 28 (1) ◽  
pp. 335-346 ◽  
Author(s):  
Grain Philip Adam ◽  
Khaled H. Ahmed ◽  
Stephen J. Finney ◽  
Keith Bell ◽  
Barry W. Williams
Keyword(s):  
Fault Tolerant ◽  
Transmission System ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Hvdc Transmission ◽  
Network Fault

Boundary Protection Strategy for the VSC-MTDC under DC Faults

2013 ◽  
Vol 448-453 ◽  
pp. 2030-2035
Author(s):  
Yan Xu ◽  
Di Feng Shi ◽  
Shao Bo Yan
Keyword(s):  
Transmission Lines ◽  
High Frequency ◽  
Renewable Energy Sources ◽  
Transmission System ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Protection Strategy ◽  
Hvdc Transmission ◽  
Protection Scheme ◽  
Attenuation Characteristics

Multi-terminal HVDC transmission system based on voltage source converter is a promising topology for the integration of the renewable energy sources. The fault characteristics of VSC-MTDC system under DC side faults was analyzed in this paper, as well as the particular requirements for the protection strategy. On the basis of the work metioned above, a four-terminal DC connected transmission system model was built in PSCAD/EMTDC. The boundary protection algorithm was proposed and the wavelet analysis was introduced. The protection scheme for VSC-MTDC transmission lines is based on the attenuation characteristics of line boundary for high frequency transient signals, which constitutes the operation criteria of the boundary protection. The protection scheme puts forward an effective method for the protection selectivity of the VSC-MTDC transmission system.

Operation Scenario and Coordination Control of DC Grid with DC-DC Converters

2020 ◽  
Vol 13 (3) ◽  
pp. 369-377
Author(s):  
Meiyan Wang ◽  
Ke-Jun Li ◽  
Kaiqi Sun ◽  
Zhijie Liu
Keyword(s):  
Direct Current ◽  
Control Strategy ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Coordination Control ◽  
High Voltage Direct Current ◽  
Relative Independence ◽  
Combined Control ◽  
Simulation Results ◽  
And Control

Background: With the increasing development of voltage source converter based high voltage direct current (HVDC), it will become a reality to interconnect different DC networks into DC grid with DC-DC converters. Methods: In this paper, three operation scenarios for the DC grid with DC-DC converters are proposed, by which the DC networks can reinforce each other with relative independence. In order to achieve the flexible switching of the proposed scenarios, the DC-DC combined control and principle of parameter selection are presented. In addition, two coordination controls for different scenarios are given to optimize the distribution of unbalanced power when the disturbances occur in the grid. With the proposed scenarios and control strategy, the impacts caused by the disturbances are alleviated and the uninterrupted operation of the grid is guaranteed. Results: A simulation model is established on the PSCAD/EMTDC and the simulation results verify the effectiveness of the proposed operation scenarios and control strategy. Conclusion: Finally, the effectiveness of the proposed operation scenarios and control strategy is verified by the simulation results in PSCAD/EMTDC.

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