Sizing of Energy System of a Hybrid Lithium Battery RTG Crane

Wangqiang Niu Niu, Xixia Huang, Feng Yuan, Nigel Schofield, Lei Xu, Janxin Chu, Wei Gu

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Rubber tyred gantry (RTG) cranes are an important piece of transport equipment in ship and rail container terminals. They have a diversified power demand, for example, peak powers of 292-kW driving, 178 kW regenerating, and 7-kW idle power. The high peak power demand determines the system prime mover (internal combustion engine) rating, which is highly over-rated for the crane average energy requirements. Such a variation in peak to idle power demand favors a hybrid power solution which, given appropriate design, can yield significant gains in fuel or energy usage and, importantly, reductions in local emissions, thus improving air-quality. In this study, a hybrid energy source for an RTG crane is presented. The hybrid energy source comprises of a lithium battery and a down-sized diesel-generator connected to the dc link through an active front end unit. While other systems have been previously proposed, the system presented here utilizes a smaller diesel-generator, thus reducing plant and fuel consumption. In addition, the battery connects directly to the dc link reducing system power electronics while improving battery response and efficiency. Experimental results from a full-size evaluation system are presented showing a 57% reduction of fuel consumption compared to a conventional RTG crane system.
Original languageEnglish
Pages (from-to)7837 - 7844
Number of pages8
JournalIEEE Transactions on Power Electronics
Volume32
Issue number10
DOIs
Publication statusPublished - 1 Oct 2017
Externally publishedYes

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Gantry cranes
Lithium batteries
Rubber
Fuel consumption
Cranes
Power electronics
Internal combustion engines
Air quality
Containers
Rails
Ships

Cite this

Niu, Wangqiang Niu ; Huang, Xixia ; Yuan, Feng ; Schofield, Nigel ; Xu, Lei ; Chu, Janxin ; Gu, Wei. / Sizing of Energy System of a Hybrid Lithium Battery RTG Crane. In: IEEE Transactions on Power Electronics. 2017 ; Vol. 32, No. 10. pp. 7837 - 7844.
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abstract = "Rubber tyred gantry (RTG) cranes are an important piece of transport equipment in ship and rail container terminals. They have a diversified power demand, for example, peak powers of 292-kW driving, 178 kW regenerating, and 7-kW idle power. The high peak power demand determines the system prime mover (internal combustion engine) rating, which is highly over-rated for the crane average energy requirements. Such a variation in peak to idle power demand favors a hybrid power solution which, given appropriate design, can yield significant gains in fuel or energy usage and, importantly, reductions in local emissions, thus improving air-quality. In this study, a hybrid energy source for an RTG crane is presented. The hybrid energy source comprises of a lithium battery and a down-sized diesel-generator connected to the dc link through an active front end unit. While other systems have been previously proposed, the system presented here utilizes a smaller diesel-generator, thus reducing plant and fuel consumption. In addition, the battery connects directly to the dc link reducing system power electronics while improving battery response and efficiency. Experimental results from a full-size evaluation system are presented showing a 57{\%} reduction of fuel consumption compared to a conventional RTG crane system.",
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Sizing of Energy System of a Hybrid Lithium Battery RTG Crane. / Niu, Wangqiang Niu; Huang, Xixia ; Yuan, Feng; Schofield, Nigel; Xu, Lei; Chu, Janxin; Gu, Wei.

In: IEEE Transactions on Power Electronics, Vol. 32, No. 10, 01.10.2017, p. 7837 - 7844.

Research output: Contribution to journalArticle

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AU - Schofield, Nigel

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