High performance control strategy for single‐phase three‐level neutral‐point‐clamped traction four‐quadrant converters

2017 ◽  
Vol 10 (8) ◽  
pp. 884-893 ◽  
Author(s):  
Song Kejian ◽  
Georgios Konstantinou ◽  
Li Jing ◽  
Wu Mingli ◽  
Vassilios Georgios Agelidis

It is well-known that traditional LCC HVDC system is not capable of control its reactive strength and terminal AC voltages. This paper investigates the reactive electricity and AC voltages manage at the inverter aspect of the LCC HVDC system with controllable capacitors. The system’s capability of operating below poor extinction angle is utilized to reap a wide range of reactive energy control and, mainly, the capacity of exporting reactive electricity. The effectiveness of the reactive strength/voltage control functionality for the proposed device is demonstrated via simulation outcomes the use of actual Time digital Simulator (RTDS). To verify the effectiveness of the reactive electricity and voltage control, CCC HVDC and LCC HVDC with SVC are also set up in RTDS. The proposed idea makes an integration of Fuzzy good judgment which assists in accurate control of capacitors and makes the device green by means of lowering the consumption of Reactive energy. All of the outcomes are acquired from the MATLAB simulations and numerous graphs are plotted.


2020 ◽  
Vol 185 ◽  
pp. 01060
Author(s):  
Huanruo Qi ◽  
Ningkang Zheng ◽  
Xiangyang Yan ◽  
Yilong Kang

Two control strategies of DFIG under grid distortion are firstly summarized, namely, the control strategy of PI-R current controller based on dq reference frame and the control strategy of PI current controller based on the multiple rotating dq reference frame, and their advantages and disadvantages are analysed. On the basis of dynamic modelling of DFIG under grid distortion, in view of the defect that DFIG coupling is not considered in the control strategy of PI-R current controller based on dq reference frame, an improved control strategy considering motor coupling is proposed. In the end, the modelling and simulation of the unimproved and improved control strategies of PI-R current controller based on dq reference frame are carried out, and the simulation results verified the effectiveness of the improved control strategy.


2009 ◽  
Vol 17 (6) ◽  
pp. 1318-1329 ◽  
Author(s):  
R. Costa-Castello ◽  
R. Grino ◽  
R. Cardoner Parpal ◽  
E. Fossas

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