Design considerations for 12-pulse diode rectifier systems operating under voltage unbalance and pre-existing voltage distortion with some corrective measures

Rendusara, D.; Enjeti, P.N.; Paice, Derek A.

doi:10.1109/28.556631

Cited by 63 publications

(18 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It is known from Equation (19) that the needed magnetic rating of the transformer used in the studied ATRU is only 18.2% of the output power P 0 . Comparing with that required by the most commonly used 12-pulse rectifier, which is 103% of the output power [18], this is a huge reduction. On the other hand, comparing with the delta-polygon ATRU proposed in [20], which is more superior in reducing the system volume and weight as the magnetic rating is only 16.4% of the conventional ATRU, the proposed ATRU is better at reducing the shaft torque ripple because its current THD is lesser.…”

Section: Thd Analysis Of the Input Currentmentioning

confidence: 95%

“…However, in WECS application, considering the quite low rotor speed, i.e., low fundamental frequency, the volume and weight of the transformer might be increased dramatically if the conventional multi-pulse technology had still been adopted. Taking the WECS in [13] as an example, if the most commonly used 12-pulse rectifier in industry is adopted, which requires two six-pulse converters connected through Y-∆ and Y-Y isolation transformers, the volume and weight of the transformer should be very large considering the low electric frequency (maximum 33.3 Hz) and high magnetic rating of the transformer (1.03 times of the maximum output power [18]). This inevitably would increase the system's cost.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On Reducing the Shaft Torque Ripple of Small-to-Medium-Scale Wind Energy Conversion Systems Using Multi-Pulse Autotransformer Rectifier

Chen

2018

Energies

View full text Add to dashboard Cite

Abstract:In a small-to-medium-scale wind energy conversion system (WECS), diode rectifiers rather than pulse-width modulated (PWM) rectifiers are widely adopted due to the features of high reliability and low cost. However, large current harmonics are induced in the generator phase current by commutations of diode rectifier, eventually causing large torque ripple on the drive-train of the WECS and making it more likely to be fatigue breakdown. In this paper, a 12-pulse autotransformer rectifier unit (ATRU) with reduced volume and weight is proposed for WECS application. By analyzing the characteristics of the input current and output voltage of the ATRU within the entire operation range of WECS, the method to properly design its parameters is proposed. A 1.2 kW direct-drive WECS demonstration platform using ATRU is built in the lab. A modified sensorless overall power control strategy is adopted to control the WECS. Experimental tests are carried out and the results not only validate the feasibility of implementing ATRU in WECS applications, but also prove its high torque ripple reduction ability.

show abstract

Section: Thd Analysis Of the Input Currentmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

On Reducing the Shaft Torque Ripple of Small-to-Medium-Scale Wind Energy Conversion Systems Using Multi-Pulse Autotransformer Rectifier

Chen

2018

Energies

View full text Add to dashboard Cite

show abstract

“…This is because preexisting harmonic voltages cause changes in the dc output voltage, which greatly complicates the design of IPTs [4], [14]. Therefore, many authors have presented great works focusing on the development of transformer concepts for multipulse-rectifier applications in order to improve the current sharing between two rectifiers' bridges and/or to eliminate the necessity of IPTs [4], [5], [7], [9], [10], [12], [13].…”

Section: Performance Evaluation Of a Novel Hybridmentioning

confidence: 99%

Performance Evaluation of a Novel Hybrid Multipulse Rectifier for Utility Interface of Power Electronic Converters

Freitas¹,

Simões²,

Canesin³

et al. 2007

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

Abstract-This paper presents an improved analysis of a novel Programmable Power-factor-corrected-Based Hybrid Multipulse Power Rectifier (PFC-HMPR) for utility interface of power electronic converters. The proposed hybrid multipulse rectifier is composed of an ordinary three-phase six-pulse diode-bridge rectifier (Graetz bridge) with a parallel connection of single-phase switched converters in each three-phase rectifier leg. In this paper, the authors present a complete discussion about the controlled rectifiers' power contribution and also a complete analysis concerning the total harmonic distortion of current that can be achieved when the proposed converter operates as a conventional 12-pulse rectifier. The mathematical analysis presented in this paper corroborate, with detailed equations, the experimental results of two 6-kW prototypes implemented in a laboratory.Index Terms-AC motor drives, high power drives for trolleybus systems, high power factor three-phase rectifiers, multipulse rectifiers, tractions applications, 12-pulse rectifiers.

show abstract

“…In addition, elimination of interphase transformers is particularly desirable when there is preexisting harmonic voltage content in the three-phase power source. Such harmonic voltages cause fluctuations in the dc output voltage, leading to further design complexities [12]- [14], [17].…”

Section: Introductionmentioning

confidence: 99%

Programmable PFC based hybrid multipulse power rectifier for ultra clean power application

Freitas

Simões

Canesin

et al. 2006

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

Abstract-A novel hybrid three-phase rectifier is proposed. It is capable to achieve high input power factor (PF) and low total harmonic input currents distortion (THD ). The proposed hybrid high power rectifier is composed by a standard three-phase six-pulse diode rectifier (Graetz bridge) with a parallel connection of single-phase Sepic rectifiers in each three-phase rectifier leg. Such topology results in a structure capable of programming the input current waveform and providing conditions for obtaining high input power factor and low harmonic current distortion. In order to validate the proposed hybrid rectifier, this work describes its principles, with detailed operation, simulation, experimental results, and discussions on power rating of the required Sepic converters as related to the desired total harmonic current distortion. It is demonstrated that only a fraction of the output power is processed through the Sepic converters, making the proposed solution economically viable for very high power installations, with fast investment payback. Moreover, retrofitting to existing installations is also feasible since the parallel path can be easily controlled by integration with the existing dc-link. A prototype has been implemented in the laboratory and it was fully demonstrated to both operate with excellent performance and be feasibly implemented in higher power applications.

show abstract

Design considerations for 12-pulse diode rectifier systems operating under voltage unbalance and pre-existing voltage distortion with some corrective measures

Cited by 63 publications

References 5 publications

On Reducing the Shaft Torque Ripple of Small-to-Medium-Scale Wind Energy Conversion Systems Using Multi-Pulse Autotransformer Rectifier

On Reducing the Shaft Torque Ripple of Small-to-Medium-Scale Wind Energy Conversion Systems Using Multi-Pulse Autotransformer Rectifier

Performance Evaluation of a Novel Hybrid Multipulse Rectifier for Utility Interface of Power Electronic Converters

Programmable PFC based hybrid multipulse power rectifier for ultra clean power application

Contact Info

Product

Resources

About