An Improved Method of DC Bus Voltage Pulsation Suppression for Asymmetric Wind Power PMSG Systems With a Compensation Unit in Parallel

2017 ◽  
Vol 32 (3) ◽  
pp. 1231-1239 ◽  
Author(s):  
Yashan Hu ◽  
Zi Qiang Zhu ◽  
Milijana Odavic
Keyword(s):  
Wind Power ◽  
Improved Method ◽  
Dc Bus ◽  
Bus Voltage ◽  
Voltage Pulsation

Main Circuit Parameter Design of Permanent Magnetic Direct-Drive Wind Power Generating System

2013 ◽  
Vol 722 ◽  
pp. 107-111
Author(s):  
Wei Wei Li ◽  
Qing Hua Gao
Keyword(s):  
Wind Power ◽  
Design Method ◽  
Engineering Practice ◽  
Circuit Parameter ◽  
Direct Drive ◽  
Converter Topology ◽  
Dc Bus ◽  
Bus Voltage ◽  
Filter Capacitor ◽  
Generating System

Design method of main circuit parameter based on theoretical calculation and engineering practice is developed for permanent magnetic direct-drive wind power generating system with dual PWM converter topology. DC bus voltage, DC bus filter capacitor, rating value of power electronic devices and gird-side LCL filter parameters are calculated for an experimental wind power generating system. Hardware platform is built using calculated parameters, and the experimental results show that the design method is viable and expected design goal is achieved.

Control for Dc-Bus Voltage Using Grid Voltage Feed-Forward and Crowbar Circuit

2013 ◽  
Vol 448-453 ◽  
pp. 1727-1731
Author(s):  
Xi Yun Yang ◽  
Li Xia Li ◽  
Ya Min Zhang
Keyword(s):  
Power System ◽  
Wind Power ◽  
Output Power ◽  
Control Method ◽  
Direct Drive ◽  
Grid Voltage ◽  
Wind Power System ◽  
Dc Bus ◽  
Bus Voltage ◽  
Grid Side

The DC bus voltage is key variable for the operation of converter system in a wind power system. When grid voltage drops, a control of the DC bus voltage is needed to keep the smoothness of DC bus voltage for avoiding generator cutting off grid. A combined control method based on the grid voltage information feedforward with a crowbar circuit is proposed for a direct-drive wind power system in the paper. The unbalanced energy of the DC bus can be unleashed by the crowbar circuit during the dropping of grid voltage. At the same time, the output power of motor-side converter can be controlled to decrease according to the grid-side voltage information, and the mechanical speed of wind turbine and generator can be suppressed by the pitch angle regulation when the output power reduces. Thus, the DC-bus voltage can keep smooth. Results based on Matlab/Simulink simulation shows that this method not only improves dynamic response performance of DC bus voltages control, but also reduces the action time of crowbar circuit. It is benefit to the ability of the wind power system riding through the grid fault.

Control of Grid Voltage Feed-Forward and Crowbar Circuit for DC-Bus Voltage

2014 ◽  
Vol 875-877 ◽  
pp. 1723-1728
Author(s):  
Xi Yun Yang ◽  
Li Xia Li ◽  
Ya Min Zhang ◽  
Jin Gao
Keyword(s):  
Power System ◽  
Wind Power ◽  
Output Power ◽  
Stability Control ◽  
Grid Voltage ◽  
Voltage Drops ◽  
Wind Power System ◽  
Dc Bus ◽  
Bus Voltage ◽  
The Stability

The DC bus voltage is the main criteria to reflect whether the converter system is working properly or not, and the stability control of the DC bus voltage is the key to ensure that wind power generators not take off the grid when grid voltage drops. This paper had done research on a direct-drive wind power system and proposed a coordinated control method based on the grid voltage information feedforward with a crowbar circuit. The hardware was combined with the improved control strategy in this method. When the grid voltage drops, the extra energy of the DC bus can be unleashed by the crowbar circuit, at the same time, the output power of motor-side can be controlled according to the grid-side information, and the mechanical speed of motor-side can be suppressed by the pitch angle regulation when the output power reduces. Thus, the DC-bus voltage can be keep stability. Results based on Matlab/Simulink simulation shows that this method not only improves the stability and dynamic response performance of the DC bus voltage, but also effectively maintains the output power of generator and reduces the action time of crowbar circuit. The ability of the wind power system riding through the grid fault has been effectively improved.

scholarly journals DC Bus Voltage Control of Wind Power Inverter Based on First-order LADRC

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Changsheng Yuan ◽  
Xuesong Zhou ◽  
Youjie Ma
Keyword(s):  
Wind Power ◽  
Voltage Control ◽  
First Order ◽  
Dc Bus ◽  
Bus Voltage

scholarly journals Real-Time Implementation of a Novel Vector Control Strategy for a Self-Excited Asynchronous Generator Driven by a Wind Turbine

2021 ◽  
Vol 54 (2) ◽  
pp. 235-241
Author(s):  
Oussama Abdessemad ◽  
Ahmed Lokmane Nemmour ◽  
Lamri Louze ◽  
Abdelmalek Khezzar
Keyword(s):  
Wind Turbine ◽  
Vector Control ◽  
Wind Power ◽  
Control Variable ◽  
Active Power ◽  
Control Technique ◽  
Reference Trajectory ◽  
Power Demand ◽  
Dc Bus ◽  
Bus Voltage

This paper proposes a novel idea to governing wind power conversion plants supplying DC loads characterizing an isolated site based on self-excited squirrel-cage induction generators (IG). In this wind power converting application, the induction generator produces an active power from the mechanical power provided by a wind-turbine to variable DC loads through a static converter with an output capacitor under constant voltage levels. For this reason, A specific vector control technique has been developed for controlling the induction machine in an analogous manner with a separated DC machine case. Thus, in order to satisfy the active power demand characterizing a variable DC load at a given rotor mechanical speed, the corresponding control laws are performed in steady-state conditions from a new control variable introduction defined by the ratio of the desired output DC-bus voltage square value and the rotor velocity. Computer simulations validated by experimental results demonstrate that the projected control approach including just one conventional controller ensures excellent tracking performances of the DC-bus voltage to its reference trajectory under simultaneous variations of the load-power demand and the rotor velocity profiles.

scholarly journals Dual Closed-Loop Linear Active Disturbance Rejection Control of Grid-Side Converter of Permanent Magnet Direct-Drive Wind Turbine

Energies ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1090 ◽  
Author(s):  
Youjie Ma ◽  
Xia Yang ◽  
Xuesong Zhou ◽  
Luyong Yang ◽  
Yongliang Zhou
Keyword(s):  
Permanent Magnet ◽  
Wind Power ◽  
Disturbance Rejection ◽  
Closed Loop ◽  
Closed Loop Control ◽  
Direct Drive ◽  
Loop Control ◽  
Disturbance Rejection Control ◽  
Dc Bus ◽  
Bus Voltage

In the permanent magnet direct-drive wind power grid-connected system, in order to solve the coupling problem between d -axis and q -axis currents and to improve the disturbance rejection performance of direct current (DC) bus voltage under grid faults, a new dual closed-loop structure based on linear active disturbance rejection control (LADRC) is proposed. This new dual closed-loop control includes current inner loop decoupling control and DC bus voltage outer loop control with first-order LADRC. As the LADRC has the advantages of decoupling and disturbances rejection, it is applied to the control of wind power grid-connected inverter. Through analysis, it is demonstrated that the current decoupling control is simpler than proportional integral (PI) control algorithm, the dynamic response speed is faster, and the DC bus voltage control has better anti-disturbance. Finally, a 1.5 MW direct-drive permanent magnet wind power system was established through digital simulation, and the control effects of the two control modes under different working conditions are compared. The simulation results verify that the proposed dual closed-loop control based on first-order LADRC is superior to PI double closed-loop control in terms of decoupling performance and disturbance rejection performance under grid faults.

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