Distributed interleaving of paralleled power converters

Perreault, David J.; Kassakian, J.G.

doi:10.1109/81.611269

Cited by 206 publications

(75 citation statements)

References 10 publications

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“…The remaining modules will then adjust their PWM carriers such that the gap in the switching waveform is eliminated, and the module PWM carriers remain equally spaced. This method is similar to an analogue synchronisation method for interleaved converters [33], and offers greater flexibility due to the digital implementation, but a lower maximum PWM switching speed due to the limited bandwidth and message timestamp resolution of the CAN bus and controller.…”

Section: A Pwm Interleaving and Sampling Synchronisationmentioning

confidence: 99%

Distributed Control of a Fault-Tolerant Modular Multilevel Inverter for Direct-Drive Wind Turbine Grid Interfacing

Parker

Finney

2013

IEEE Trans. Ind. Electron.

129

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Abstract-Modular generator and converter topologies are being pursued for large offshore wind turbines to achieve fault tolerance and high reliability. A centralized controller presents a single critical point of failure which has prevented a truly modular and fault tolerant system from being obtained. This study analyses the inverter circuit control requirements during normal operation and grid fault ride-through, and proposes a distributed controller design to allow inverter modules to operate independently of each other. All the modules independently estimate the grid voltage magnitude and position, and the modules are synchronised together over a CAN bus. The CAN bus is also used to interleave the PWM switching of the modules and synchronise the ADC sampling. The controller structure and algorithms are tested by laboratory experiments with respect to normal operation, initial synchronization to the grid, module fault tolerance and grid fault ride-through.

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Section: A Pwm Interleaving and Sampling Synchronisationmentioning

confidence: 99%

Distributed Control of a Fault-Tolerant Modular Multilevel Inverter for Direct-Drive Wind Turbine Grid Interfacing

Parker

Finney

2013

IEEE Trans. Ind. Electron.

129

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“…Also hot-plugging is not supported by this particular system. In [3], [5], analog master-less control systems have been presented which implement phase alignment via analog communication lines. Each converter feeds a current into a common wire and uses the voltage generated by the sum of the individual currents across a known impedance as feedback.…”

Section: A Optimal Phase Distributionmentioning

confidence: 99%

“…1), or the use of multi-phase converters (interleaved phases), provides several benefits such as an increase in effective switching frequency, reduced ripple voltage, improved transient performance and improved efficiency [1]- [5]. Conversely, issues not present in stand-alone converters arise [6]- [8].…”

Section: Introductionmentioning

confidence: 99%

Scalable Digital Power Controller With Phase Alignment and Frequency Synchronization

Effler

Halton

Mooney

et al. 2014

IEEE Trans. Circuits Syst. I

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Abstract-The trend in next-generation switched-mode power supplies will lead to modular, scalable solutions which deliver power efficiently over a wide range of operation. This paper details a new approach to introduce more advanced control features like phase-alignment and frequency synchronization into such scalable solutions. While these methods have been incorporated into multi-phase converters in the past, they all require the distribution of information among the individual converters. In distributed solutions, dedicated communication signals have been used to share this information. An advantage of the proposed method is that it does not require such communication signals between the individual power supplies and is therefore fully scalable and cost effective. Perturbances generated by the switching actions of the individual converters on the common input/output voltage are used by each converter to harvest information about the switching actions of its counterparts. An algorithm is proposed to align the individual phases and synchronize the switching frequencies based on this information. This allows a reduction of input/output capacitor ripple currents, similar to techniques used in multi-phase designs. Experimental results for an FPGA prototype implementation are presented.

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“…Another FC current ripple reduction approach is based on connecting dc-dc converters in parallel with an interleaving technique [79][80][81], as shown in Fig. 8.…”

Section: Current Ripplementioning

confidence: 99%

A Review of the Main Power Electronics' Advances in Order to Ensure Efficient Operation and Durability of PEMFCs

et al. 2012

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Original scientific paperThis article focuses on the main issues that affect the lifetime and performance of proton-exchange membrane fuel cells. The short lifespans of these fuel cells represent a barrier to their massive commercialization and usage in mobile and stationary applications. As fuel cell is a very complex system, a lot of knowledge of different areas is required, such as chemistry, electricity and mechanics, in order to completely understand its operation and all the problems that can occur during it. It is for this reason that an interdisciplinary approach needs to be taken when designing fuel-cell energy systems. This paper focuses on identifying and solving those issues that negatively affect the lifetime and performance of fuel cells. It is hoped that this article would be a valuable aid for power electronics' researchers and engineers for better understanding the presented issues and a useful guide for solving them with the use of proper power electronic-devices. Initially, the basic operation and structure of a proton-exchange membrane fuel cell is explained. Three main issues that can occur during operation of a mobile or stationary fuel cell energy system are pointed out and discussed in details, on the basis of the state-of-the-art on fuel cell technology. These issues are poor water management, reactant gas starvation and fuel cell current ripple. This article provides answers as to why they occur, how they affect the fuel cell, how they can be mitigated, and what are the future trends within this research field.Key words: PEMFC, Water management, Reactant gas starvation, Current ripple, Power electronics.Pregled znanstvenih napredaka u učinskoj elektronici usmjerenih ka osiguravanju efikasnog rada i dužeg životnog vijeka PEM gorivihćelija.Članak se osvrće na ključna pitanja koja utječu na vrijeme rada i performanse gorivihćelija s polimernom membranom kao elektrolitom. Kratak životni vijek gorivihćelija takve vrste prepreka je njihovoj komercijalizaciji i masovnoj upotrebi u mobilnim i stacionarnim stanicama. Budući da su gorivećelije komplicirani sustavi potrebno je znanje iz raznih područja kemije, elektrotehnike i mehanike da bi se u potpunosti mogao razumjeti njihov način rada i problemi koji se dogadaju. Upravo je zbog toga multidisciplinarni pristup nužnost pri razvoju sustava koji koriste gorivećelije. Ovaj ječlanak usmjeren prema identifikaciji i rješavanju onih problema koji negativno utječu na životni vijek i performanse gorivihćelija. Autori se nadaju daće sečlanak pokazati kao korisna pomoć i vodič istraživačima i inženjerima u domeni učinske elektronike pri susretu s navedenim problemima. Objašnjen je način rada i struktura gorivećelije s polimernom membranom kao elektrolitom. Izložena su, i diskutirana do u detalje, tri glavna problema sa stajališta trenutačnih spoznaja u području učinske elektronike. Ti problemi su: loše upravljanje vodom, nestanak reaktantnog plina i strujni trzaji u gorivimćelijama. Objašnjeno je zašto se ovi problemi dogadaju, kako utječu na gorivućelij...

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Distributed interleaving of paralleled power converters

Cited by 206 publications

References 10 publications

Distributed Control of a Fault-Tolerant Modular Multilevel Inverter for Direct-Drive Wind Turbine Grid Interfacing

Distributed Control of a Fault-Tolerant Modular Multilevel Inverter for Direct-Drive Wind Turbine Grid Interfacing

Scalable Digital Power Controller With Phase Alignment and Frequency Synchronization

A Review of the Main Power Electronics' Advances in Order to Ensure Efficient Operation and Durability of PEMFCs

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