Fault tolerance of the bidirectional trans quasi-Z-source inverter

Florez-Tapia, Ane M.; Vadillo, Javier; Echeverría, José Martín

doi:10.1016/j.ijepes.2017.09.005

Cited by 11 publications

(4 citation statements)

References 32 publications

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“…Because of the complete symmetry of the circuit, the circuit operation is the same either way, and so here we discuss the analysis of forward power transfer only. In addition, the DC source/ or load can be either current or voltage source/ or load due to impedance source network [13,19] . When transferring power from U 1 to U 2 , S i (i = 1, 2, 3, 4) and SW 2 are turned on and all the other switches are turned off.…”

Section: Operation Mode Of Qzibdcmentioning

confidence: 99%

Quasi-Z-source based bidirectional DC-DC converter and its control strategy

Kafle

Hasan

Town

2019

Chin. J. Electr. Eng.

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This paper presents a quasi-Z-source based isolated bidirectional DC-DC converter (qZIBDC) for renewable energy applications. The converter utilizes a dual active bridge circuit with a quasi-Z-source network on both sides, so the converter works as buck/boost converter from either side. It has a wider input/output voltage operating range, soft-switching capabilities without additional devices, and higher boost capability than a traditional dual active bridge circuit. Apart from that, shoot-through states are incorporated in its operating cycle to boost the input voltage resulting in high reliability of the proposed converter. Due to the symmetrical structure of the circuit, there is no defined high voltage or low voltage side as in traditional isolated bidirectional DC-DC converter. The operating principle and control strategy of the proposed converter are presented. Simulation and experimental results are provided to verify the effectiveness of the proposed converter topology and its control strategy.

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Section: Operation Mode Of Qzibdcmentioning

confidence: 99%

Quasi-Z-source based bidirectional DC-DC converter and its control strategy

Kafle

Hasan

Town

2019

Chin. J. Electr. Eng.

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“…One of the advances in ZSI topologies is the addition of magnetically coupled inductors in the impedance network, which improves the voltage boost capabilities and the modulation index, as well as reduces the number and the size of the passive elements in the impedance network [5]. Some of these improved configurations are the trans-ZSI [5], [6] and the improved trans-ZSI in [7]. The increase in the voltage boost of the converter achieved with the modulation techniques in [3], [8] is modest, while the configurations presented in [7], [9] have very high current and voltage levels.…”

Section: Introductionmentioning

confidence: 99%

Transformer‐Based Z‐Source Inverter with MVDC Link

González-Rivera¹,

García-Vázquez²,

Triviño³

et al. 2024

RE&PQJ

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Z‐source inverters have attracted considerable attention in renewable energy systems like photovoltaic (PV) systems due to advantages such as buck–boost power conversion in single stage, shoot-through capability, and wide range of input voltage regulation. Transformer-Based Z-source inverters (TransZSI) based on magnetically coupled inductors and reduced number of passive components can be used to improve the boost capacity of these inverters, and to increase the voltage levels. Medium voltage DC (MVDC) is being used more and more in distribution grids and renewable energy systems. This paper presents a transZ-source inverter with MVDC link where renewable energy systems and energy storage systems can be integrated. The active and reactive powers and DC voltage are controlled by acting on the modulation index and shoot-through duty cycle of the converter. The trans-Z-source inverter is evaluated under different operating conditions to illustrate its suitable operation.

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“…Therefore, in order to improve the stability, security and reliability of the network control system, fully and reasonably utilize network resources, and use fault-tolerant control methods to ensure that the system can still work normally and stably in the event of component failures, network failures and external disturbances. Very important theoretical significance and practical application value [8]. Now, although some system control model literatures are based on neural networks, the unreliable factors of distributed systems are not fully considered.…”

Section: Introductionmentioning

confidence: 99%

Fault Tolerant Control of Distributed System Based on Neural Network

2020

DPS

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Neural networks are very promising in the design and control of distributed systems due to their powerful computing power, learning and adaptive capabilities, and distributed capabilities. The purpose of this work is to study fault-tolerant control of distributed systems based on neural networks. For nonlinear systems with actuator failures, fault-tolerant control based on a small portion of the network is required. By combining error tracking and forecasting methods to build performance metrics and reduced fault-tolerant systems, this translates into a control problem. The PSO algorithm is introduced to train the judgment neural network, which avoids the selection of the initial vector and improves the training success rate to a certain extent. To mitigate the effects of actuator errors, a neural network error observer is designed to estimate and compensate for errors. Finally, the effectiveness of the proposed fault-tolerant supervisory control method is proved by an example simulation.

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Fault tolerance of the bidirectional trans quasi-Z-source inverter

Cited by 11 publications

References 32 publications

Quasi-Z-source based bidirectional DC-DC converter and its control strategy

Quasi-Z-source based bidirectional DC-DC converter and its control strategy

Transformer‐Based Z‐Source Inverter with MVDC Link

Fault Tolerant Control of Distributed System Based on Neural Network

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