scholarly journals Voltage Space Vector Equivalent Substitution Fault-Tolerance Control for Cascaded H-Bridge Multilevel Inverter with Current-Tracking

Electronics ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 93 ◽  
Author(s):  
Guohua Li ◽  
Chunwu Liu ◽  
Yufeng Wang
Keyword(s):  
Control Method ◽  
Fault Tolerant ◽  
Multilevel Inverter ◽  
Space Vector ◽  
Voltage Space Vector ◽  
Original Algorithm ◽  
Voltage Vector ◽  
Simulation And Experiment ◽  
Fault State ◽  
Tolerance Control

A novel fault-tolerant control method based on the equivalent substitution of voltage space vector for cascaded H-bridge multilevel inverter with current-tracking is proposed in this paper. With this method, the fault effects on the voltage vector of each sector of the cascaded inverter is analyzed first. Then, an algorithm to substitute the voltage vector in fault state is developed. In the fault state, if the voltage vector selected by the original algorithm cannot be used normally, the redundant voltage vector with the position coincidence is preferentially selected for equivalent substitution. If there is no redundant coincidence vector, select the other vector whose position and effect are closest to it. Compared with the commonly used N + 1 redundancy method, this method does not require the spare cascaded units and can be applied to any class cascaded H-bridge multilevel inverter with current-tracking to improve its reliability. Finally, the effectiveness of the proposed method is validated by simulation and experiment results.

scholarly journals A Secondary Reconfigurable Inverter and Its Control Strategy

2020 ◽  
Vol 10 (20) ◽  
pp. 7021
Author(s):  
Yan Li ◽  
Peng Xiang ◽  
Yandong Chen
Keyword(s):  
Control Strategy ◽  
Control Method ◽  
Fault Tolerant ◽  
Frequency Control ◽  
Semiconductor Devices ◽  
Constant Frequency ◽  
Power Semiconductor ◽  
Power Semiconductor Devices ◽  
Simulation And Experiment ◽  
And Control

This article proposes a topology of the secondary reconfigurable inverter and the corresponding fault-tolerant control strategy. When the secondary reconfigurable inverter is operating normally, its topology structure is the TPSS circuit. When the power semiconductor devices in the inverter are faulty, the inverter circuit needs to be reconfigured. After removing the faulty power semiconductor devices, the remaining power semiconductor devices and the DC side powers are reconstructed as the TPFS structure to keep the system running normally. This article also proposes a switch-pulse-resetting algorithm. This paper adopts the control strategy connecting the constant-voltage, constant-frequency control method with the switch pulse resetting algorithm. It need not change the control algorithm when the proposed reconfigurable inverter is transformed from the normal running state into the faulty running state. The inverter dependability is greatly improved. Finally, the feasibility and effectiveness of the proposed second reconfigurable inverter topology and control strategy are verified by simulation and experiment.

V2G Technology for Electric Vehicles

2014 ◽  
Vol 641-642 ◽  
pp. 1256-1259
Author(s):  
Xue Song Zhou ◽  
Xiao Li Kong ◽  
You Jie Ma
Keyword(s):  
Smart Grid ◽  
Vector Control ◽  
Electric Vehicles ◽  
Control Method ◽  
Power Grid ◽  
Rotating Frame ◽  
Space Vector ◽  
Voltage Space Vector

V2G technology is an important part of the smart grid,which realizes the power inter-transformation between Power Grid and electric vehicles [1]. V2G technology is introduced and the structure of charging and discharging system in V2G technology is analyzed [2]. Under synchronous rotating frame, the combination current-controlled and Voltage space vector control method is adopted, which carries out the power inter-transformation between Power Grid and electric vehicles [3].

Research of HCC-SVPWM Method for Photovoltaic Grid-Connected Inverter with APF Function

2014 ◽  
Vol 602-605 ◽  
pp. 2991-2994
Author(s):  
Hua Yang ◽  
Ji Luo ◽  
Lei Meng Cheng ◽  
Wei Su ◽  
Yun Jia She
Keyword(s):  
Control Method ◽  
System Model ◽  
Space Vector ◽  
Voltage Space Vector ◽  
Grid Connected Inverter

In the paper, the system model of photovoltaic grid-connected inverter with APF function is established, proposing HCC-SVPWM control method based on the analysis of voltage space vector and detecting current by using ip-iq algorithm. The system not only makes full use of PV power, but also compensates harmonics and reactive currents of the loads very well. The availability of such theory is proved by the simulation.

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