Development of high-performance solar LED lighting system

Huang, Bin‐Juine; Wu, Min-Sheng; Hsu, Ping-Chi; Chen, J.W.; Chen, K.Y.

doi:10.1016/j.enconman.2009.11.046

Cited by 40 publications

(23 citation statements)

References 10 publications

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“…Conventional solar energy illumination systems consist of two-stage power converter architectures [1][2][3][4][5][6]. The first stage DC/DC converter is responsible for charging controls and maximum power point tracking (MPPT) [7]; the second stage DC/DC converter is responsible for driving and dimming the output of the high-brightness LEDs (HBLEDs).…”

Section: Introductionmentioning

confidence: 99%

A bidirectional DC/DC converter charge/discharge controller for solar energy illumination system integrating synchronous rectification SEPIC converter and active clamp flyback converter

Huang

2015

Circuit Theory & Apps

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This paper presents a novel bidirectional DC-to-DC converter charge/discharge controller for solar energy illumination system. The bidirectional converter architecture integrates the synchronous rectification Single Ended Primary Inductor Converter (SEPIC) converter and an active clamp flyback converter. In addition to fully use the properties of the shared components and compensate for the shortcomings of conventional two-stage illumination systems, the proposed system has the advantages of soft-switching, simple structure, and high efficiency. During daytime, a SEPIC converter with synchronous rectification function was used to charge the lead acid battery through three-stage charging and maximum power point tracking. At night, the battery discharges, driving and dimming high-brightness LEDs using the active clamp flyback converter. Finally, a solar energy illumination system with both a 160 W charge/discharge controller and an 80 W LED driver was implemented to verify the feasibility and practicality of the proposed system. Figure 5. Operation principles of the synchronous rectification SEPIC converter: (a) operation mode 1, (b) operation mode 2, and (c) operation mode 3. DPDT, double-pole double-throw.Equation 13 describes the step-up mode when D > 0.5 and the step-down mode when D < 0.5. The range of V pv in the currently proposed system is 20-36 V, and the battery output is 24 V. 310 a. Conduction loss:Overall efficiency curve of the synchronous rectification SEPIC converter. Figure 15. V gs1 /V ds1 and V ds2 /V gs2 waveforms of S 1 and S 2 of the active clamp flyback converter. 26. Chen M, Rincon-Mora GA. Accurate electrical battery model capable of predicting runtime and I-V performance. IEEE Transactions on Energy Conversion 2006; 21 (2):504-511. 27. Oh IH. An analysis of current accuracies in peak and hysteretic current controlled power LED drivers.

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Section: Introductionmentioning

confidence: 99%

A bidirectional DC/DC converter charge/discharge controller for solar energy illumination system integrating synchronous rectification SEPIC converter and active clamp flyback converter

Huang

2015

Circuit Theory & Apps

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“…In the past, various studies related to the technical optimization of solar street light applications have been reported [5]- [7]. Even though there are many works dedicated to the development of solar battery chargers, most of them focus on large scale power generation and high voltage applications [8]- [12].…”

Section: Introductionmentioning

confidence: 99%

Single Sensor Charging System with MPPT Capability for Standalone Streetlight Applications

Osman¹,

Rahim²,

Selvaraj³

et al. 2015

Journal of Power Electronics

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Maximum power point tracking (MPPT) and battery charging control are two important functions for a solar battery charger. The former improves utilization of the available solar energy, while the latter ensures a prolonged battery life. Nevertheless, complete implementation of both functions can be complex and costly, especially for low voltage application such as standalone street lamps. In this paper, the operation of a solar battery charger for standalone street light systems is investigated. Using only one voltage sensor, the solar charger is able to operate in both MPPT and constant voltage (CV) charging mode, hence providing high performance at a low cost. Using a lab prototype and a solar simulator, the operation of the charger system is demonstrated and its performance under varying irradiance is validated.

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“…Most of the existing research focuses on the need for adequate control [15] of both daylight [8,16] and occupancy [16,17,18] conditions. A second strategy is to undertake technology retrofits [19,20], in which LED is of increasing interest as it is becoming a more affordable and reliable alternative [21,22], even though it has not always proven to be worth the investment [23,24]. Research into the lighting efficiency of underground spaces has been scarce until now [2,23].…”

Section: Introductionmentioning

confidence: 99%

Reducing lighting electricity use in underground metro stations

Casals

Gangolells

Forcada

et al. 2016

Energy Conversion and Management

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Lighting systems are usually one of the largest electrical end-uses in underground metro stations. Taking into account that budget restrictions in publicly owned companies hinder energy efficiency retrofit projects that require high initial investments, affordable energy saving strategies are needed. This paper presents a low-cost approach for reducing lighting electricity use in underground stations, without affecting passengers' comfort or the metro operator's service. For this purpose, an adaptive lighting strategy of dimming the illuminance levels of artificial light sources has been developed. Dimming controls are based on the occupancy of the station, and the preventive maintenance and cleaning cycles of the luminaires. The stations' monthly occupancy patterns are defined through the k-means clustering technique. To illustrate its effectiveness, the method was applied to 115 underground stations of the Barcelona metro network. The results revealed overall electricity savings of 255.47 MW h on a biannual basis, which represents 36.22% of the stations' baseline lighting consumption. Individual energy savings were found to range from 25 to 87.5 MW h/year in the stations of the Barcelona metro network, depending on the number and profile of station users. The research findings will undoubtedly be useful for the future energy efficiency project plans of worldwide metro operators and managers of other underground spaces.Peer ReviewedPostprint (author's final draft

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Development of high-performance solar LED lighting system

Cited by 40 publications

References 10 publications

A bidirectional DC/DC converter charge/discharge controller for solar energy illumination system integrating synchronous rectification SEPIC converter and active clamp flyback converter

A bidirectional DC/DC converter charge/discharge controller for solar energy illumination system integrating synchronous rectification SEPIC converter and active clamp flyback converter

Single Sensor Charging System with MPPT Capability for Standalone Streetlight Applications

Reducing lighting electricity use in underground metro stations

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