scholarly journals Wind Turbines Reactive Current Control During Unbalanced Voltage Dips

10.5772/54095 ◽  
2013 ◽  
Author(s):  
Ivan Jorge ◽  
Humberto Pinheiro ◽  
Hilton Abilio
Keyword(s):  
Wind Turbines ◽  
Current Control ◽  
Reactive Current ◽  
Voltage Dips ◽  
Unbalanced Voltage

scholarly journals Reactive Current Control Strategy of CHB-DSTATCOM Based on Unit Vector

2021 ◽  
Vol 714 (4) ◽  
pp. 042038
Author(s):  
Jiahao Chen ◽  
Daliang Yang ◽  
Shengguang Xu ◽  
Shuang Chen
Keyword(s):  
Control Strategy ◽  
Unit Vector ◽  
Current Control ◽  
Reactive Current

scholarly journals An Evaluation Method for Voltage Dips in a Shipboard Microgrid Under Quasi-Balanced and Unbalanced Voltage Conditions

2019 ◽  
Vol 66 (10) ◽  
pp. 7683-7693 ◽  
Author(s):  
Wenzhao Liu ◽  
Tomasz Tarasiuk ◽  
Chun-Lien Su ◽  
Mariusz Gorniak ◽  
Mehdi Savaghebi ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Voltage Dips ◽  
Unbalanced Voltage

scholarly journals Voltage Ride through Control Strategy of Modular Multilevel Converter under Unbalanced Voltage Sag

2019 ◽  
Vol 9 (3) ◽  
pp. 551
Author(s):  
Seyed Hakimi ◽  
Amin Hajizadeh
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Current Control ◽  
Adaptive Robust Control ◽  
Voltage Sag ◽  
Modular Multilevel Converter ◽  
Multilevel Converter ◽  
Control Approach ◽  
Control Loops ◽  
Unbalanced Voltage

This paper develops modeling and describes a control strategy for a modular multilevel converter (MMC) for grid-connected renewable energy systems. The proposed model can be used to simulate MMC activity during normal and faulty situations. Firstly, a dynamic model of a grid-connected MMC (GC-MMC), based upon the symmetrical component of voltages and currents, was designed. Then an adaptive robust control approach was established in order to follow the reference currents of the converter and stabilize the submodule (SM) capacitor voltage. The positive and negative sequences of reference currents that were given from the demanded active and reactive power during grid voltage disturbance and a normal situation were then utilized in control loops. Finally, the numerical results for the performance of the MMC throughout voltage sag conditions and the effect of uncertainties on the filter parameters during changing power demands were evaluated. The results specified that the current control strategy is more potent under voltage sag situations and able to fulfill the stability requirements of the MMC.

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