Low voltage ride-through control strategy of a large capacity DFIG with grid-side thyristor controlled voltage regulator

2011 ◽  
Author(s):  
Chun Wei ◽  
Minxiao Han ◽  
Shaobo Lin ◽  
Xiang Li
Keyword(s):  
Control Strategy ◽  
Low Voltage ◽  
Voltage Regulator ◽  
Large Capacity ◽  
Low Voltage Ride Through ◽  
Grid Side

scholarly journals Control Strategy of Three-Phase Photovoltaic Inverter under Low-Voltage Ride-Through Condition

2015 ◽  
Vol 2015 ◽  
pp. 1-23 ◽  
Author(s):  
Xianbo Wang ◽  
Zhixin Yang ◽  
Bo Fan ◽  
Wei Xu
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Low Voltage ◽  
Voltage Drop ◽  
Stable Operation ◽  
Power Fluctuation ◽  
Negative Sequence ◽  
Grid Voltage ◽  
Low Voltage Ride Through ◽  
Grid Side

The new energy promoting community has recently witnessed a surge of developments in photovoltaic power generation technologies. To fulfill the grid code requirement of photovoltaic inverter under low-voltage ride-through (LVRT) condition, by utilizing the asymmetry feature of grid voltage, this paper aims to control both restraining negative sequence current and reactive power fluctuation on grid side to maintain balanced output of inverter. Two mathematical inverter models of grid-connected inverter containing LCL grid-side filter under both symmetrical and asymmetric grid are proposed. PR controller method is put forward based on inverter model under asymmetric grid. To ensure the stable operation of the inverter, grid voltage feedforward method is introduced to restrain current shock at the moment of voltage drop. Stable grid-connected operation and LVRT ability at grid drop have been achieved via a combination of rapid positive and negative sequence component extraction of accurate grid voltage synchronizing signals. Simulation and experimental results have verified the superior effectiveness of our proposed control strategy.

A Improved LVRT Control Strategy Based on Active and Reactive Power for Direct-Drive PMSG Wind Generation System

2013 ◽  
Vol 732-733 ◽  
pp. 1184-1187
Author(s):  
Guo Liang Yang ◽  
Shuo Yang Liu ◽  
Xin Yan Chang ◽  
En Bei Zhang
Keyword(s):  
Control Strategy ◽  
Reactive Power ◽  
Low Voltage ◽  
Control Strategies ◽  
Synchronous Generator ◽  
Direct Drive ◽  
Pwm Inverter ◽  
Low Voltage Ride Through ◽  
Active And Reactive Power ◽  
Grid Side

The structure of the uncontrolled rectifier + Boost circuit + PWM inverter is taken for direct-drive permanent magnet synchronous generator (PMSG) wind-power system. on the basis of the analysis for two different traditional control strategies for the grid side converter, a new control strategy Based on active and reactive power for the low voltage ride through running is proposed and described in detail. The simulation results verify that the given control strategy can be better to provide a reliable guarantee for the system low voltage ride through capability and to provide some reference for the actual control system design.

Study on an Advanced Low Voltage Ride-Through Control Strategy of Energy Router

2021 ◽  
Author(s):  
Xuefeng Qiao ◽  
Lei Chen ◽  
Jingguang Tang ◽  
Meng Ding ◽  
Zekai Zhao
Keyword(s):  
Control Strategy ◽  
Low Voltage ◽  
Low Voltage Ride Through
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