Reliable Control of Direct PWM AC-AC Buck Converter With Short Circuit Protection

Wang, Jianguo; McMahon, R.A.

doi:10.1109/isie.2019.8781419

Cited by 3 publications

(5 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As mentioned, fuses are used in some protection circuits, but in some converters, such as PWM ac-ac converters, the fuse cannot provide adequate protection for semiconductor devices. The proposed control system (Wang and McMahon, 2019) bypasses the fault currents through specified switching modes. Also, safe transient modes are provided between different switching modes that can keep current paths safe.…”

Section: Introductionmentioning

confidence: 99%

A fast and cost-effective short circuit protection scheme for low-power converters for small-scale photovoltaic application

Ebadi

Abbasi

Maghsoudi

2022

View full text Add to dashboard Cite

Purpose This paper aims to propose an integrated protection scheme for converters of a low-power, low-cost photovoltaic system. Power electronic converters use a variety of methods to limit overload and fault current. The use of insulated and non-insulated sensors along with additional circuits to detect and limit fault current can cause current to be limited or completely cut off before damage to semiconductor devices. In addition, fuses that have slower performance are used as backup for any type of protection. Design/methodology/approach First, all the candidate points for protection are investigated. In this paper, after examining the performance of glass fuses as linear resistors, they are used as a current feedback element. A simple, isolated and reliable circuit for fault detection at various points of the system has been proposed that can be implemented and operated in single shot or auto-reclose operating mode. Findings The experimental results of this circuit on a dc/dc converter and an H-bridge inverter show that it can cut off all instantaneous short circuit errors in less than 50 µs and prevent damage to the semiconductor switch. Originality/value In low-cost and low-power converters, it is usually not cost-effective to use complex and expensive devices. For this reason, these converters are more vulnerable to faults. On the other hand, in complex systems such as photovoltaics, several converters are used simultaneously in different parts, and the occurrence of a fault in each of them causes the whole system to fail.

show abstract

Section: Introductionmentioning

confidence: 99%

A fast and cost-effective short circuit protection scheme for low-power converters for small-scale photovoltaic application

Ebadi

Abbasi

Maghsoudi

2022

View full text Add to dashboard Cite

show abstract

“…Because of this situation, using additional filtering units such as passive filters or coupling transformers is essential to reduce the harmonics of the regulator output voltage. The researchers study AC-AC regulators based on switch-mode operation such as buck [12][13][14][15][16], boost [17,18], and buck-boost [19,20] type regulators for AC regulation for a long time. As the mentioned AC-AC regulators operate in switch-mode and have an internal filtering structured topology, close to sine-wave output voltages without the need for additional filtering units to eliminate the output voltage harmonics can be provided.…”

Section: Introductionmentioning

confidence: 99%

“…TS represents the PWM switching period in (15). It is not possible to achieve the reference output voltage only by the PWM duty ratio of the CL in (15).…”

mentioning

confidence: 99%

See 1 more Smart Citation

Three-phase Active Tracking AC-AC Voltage Regulator based on Buck Converter with an Efficient Hybrid Control Technique

Yalçın¹,

Himmelstoss

2022

Düzce Üniversitesi Bilim Ve Teknoloji Dergisi

View full text Add to dashboard Cite

This study proposes a switch-mode three-phase active tracking AC-AC voltage regulator based on the buck converter. The regulator topology incorporates a moderate number of components with less complexity and high efficiency. An efficient hybrid control technique, based on a closed-loop PID controller that is supported with a new designed feedforward controller, is proposed for the regulator control different to the similar studies in the literature. The hybrid control technique augments the response of active tracking of the reference output phase voltages to achieve an improved quality close to sine-wave output phase voltages for either the input AC phase voltages that are ideal pure sine-wave or include various harmonics. The regulator topology has a modular structure for independent control of each output phase. So, the regulator can help to achieve close to sine-wave output phase voltages to supply a balanced/unbalanced wye-connected three-phase load or independent single-phase loads. The presented three-phase regulator and the control technique are tested with simulation and experimental studies. The laboratory set-up of the regulator is designed for 2.2 kW output power, 0-300 Vp input phase voltages (50 Hz), and 0-200 Vp output phase voltages. The results demonstrated that the proposed switch-mode three-phase buck-type active tracking voltage regulator can provide the desired AC phase voltages with less than 5% THD (total harmonic distortion) and low harmonics for different operating conditions.

show abstract

“…A detailed theoretical analysis and both simulated and experimental results validate the effectiveness of the proposed control strategy and circuit topology. The control strategy for the ac-ac buck converter has been briefly introduced in [25]. Substantive new materials, including the application of VO, systematical analysis, power loss study, new hybrid SiC & Si topology, and results, etc., are presented in this paper.…”

Section: Introductionmentioning

confidence: 99%

Highly Reliable and Efficient Voltage Optimizer Based on Direct PWM AC-AC Buck Converter

Wang

McMahon

2020

IEEE Trans. Energy Convers.

Self Cite

View full text Add to dashboard Cite

show abstract

Reliable Control of Direct PWM AC-AC Buck Converter With Short Circuit Protection

Cited by 3 publications

References 31 publications

A fast and cost-effective short circuit protection scheme for low-power converters for small-scale photovoltaic application

A fast and cost-effective short circuit protection scheme for low-power converters for small-scale photovoltaic application

Three-phase Active Tracking AC-AC Voltage Regulator based on Buck Converter with an Efficient Hybrid Control Technique

Highly Reliable and Efficient Voltage Optimizer Based on Direct PWM AC-AC Buck Converter

Contact Info

Product

Resources

About