Modeling and Control of Grid Side Converter in Wind Power Generation System Based on Synchronous VFDPC with PLL

2011 ◽  
Vol 52-54 ◽  
pp. 1917-1922
Author(s):  
You Gui Guo ◽  
Ping Zeng ◽  
Li Juan Li ◽  
Jie Qiong Zhu ◽  
Wen Lang Deng ◽  
...  
Keyword(s):  
Power Generation ◽  
Wind Power ◽  
Reactive Power ◽  
Phase Lock Loop ◽  
Active Power ◽  
Wind Power Generation ◽  
Generation System ◽  
Power Generation System ◽  
Grid Side ◽  
Grid Side Converter

Virtual flux oriented direct power control (VFDPC) is combined space vector modulation (SVM) with PI of DC-link voltage, active power and reactive power to control the grid side converter in wind power generation system in this paper. VFDPC has reached good performances with PLL (phase lock loop). First the mathematical models of grid side converter, LCL filter and phase lock loop are given. Then the control strategy of grid side converter-based wind power generation system is given in detail. Finally the simulation model is modeled consisting of power circuits, such as the grid side converter, LCL filter, transformer grid, and control parts, such as PI controllers of DC-link voltage, active power, reactive power, and SVM, and so on. The simulation results have verified that the control strategy is feasible to fit for control of gird currents, active power, reactive power and DC-link voltage in wind power generation system.

Adaptive Hysteresis Band Current Control (AHB) with PLL of Grid Side Converter-Based Wind Power Generation System

2011 ◽  
Vol 52-54 ◽  
pp. 1911-1916
Author(s):  
You Gui Guo ◽  
Ping Zeng ◽  
Li Juan Li ◽  
Jie Qiong Zhu ◽  
Wen Lang Deng ◽  
...  
Keyword(s):  
Power Generation ◽  
Wind Power ◽  
Reactive Power ◽  
Active Power ◽  
Current Control ◽  
Wind Power Generation ◽  
Generation System ◽  
Power Generation System ◽  
Grid Side ◽  
Grid Side Converter

Adaptive hysteresis band current control(AHB CC) is used to control the three-phase grid currents by means of grid side converter in wind power generation system in this paper. AHB has reached the good purpose with PLL (Lock phase loop). First the mathematical models of each part are given. Then the control strategy of grid side converter-based wind power generation system is given in detail mainly including ABH CC and PI controllers of DC-link voltage, active power, reactive power. Finally the simulation model is set up which consists of power circuits, such as the grid side converter, LCL filter, transformer and grid, and control parts, etc. The simulation results have verified that the control strategy is feasible to fit for control of gird currents, active power, reactive power and DC-link voltage in wind power generation system.

Open-Switch Fault-Tolerant Control of a Grid-Side Converter in a Wind Power Generation System

2015 ◽  
Vol 6 (2) ◽  
pp. 293
Author(s):  
Partha Sarati Das ◽  
Kyeong-Hwa Kim
Keyword(s):  
Power Generation ◽  
Fault Detection ◽  
Wind Power ◽  
Fault Tolerant ◽  
Wind Power Generation ◽  
Generation System ◽  
Open Switch ◽  
Power Generation System ◽  
Grid Side ◽  
Grid Side Converter

A fault-tolerant technique of a grid-side converter (GSC) is a very important task because the unbalanced grid power endangers the overall system. Since the GSC is very sensitive to grid disturbance, the complete system needs to be stopped suddenly once an open-switch fault occurs. To improve the reliability of system, the continuous operation should be guaranteed. In this paper, a redundant topology based fault-tolerant algorithm is proposed for a GSC in a wind power generation system. The proposed scheme consists of the fault detection and fault-tolerant algorithms. The fault detection algorithm employs the durations of positive and negaitive cycles of three-phase grid currents as well as normalized root mean square (RMS) currents. Once a fault is detected, the corresponding faulty phase is identified and isolated to enable the fault-tolerant operation. The faulty phase is replaced by redundant one rapidly to recover the original shape of the grid currents, which ensures the continuity in operation. In contrast with the conventional methods, the proposed fault detection and fault-tolerant algorithms work effectively even in the presence of the open faults in multiple switches in the GSC. Simulation results verify the effectiveness of the proposed fault diagnosis and fault-tolerant control algorithms.

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