Compact modeling of electrical LED module for analysis of LED driver system

Qiu, Diancheng; Liao, Mian; Liao, Zhiling; Chen, Zhaoling; Zhang, Shanshan

doi:10.1016/j.ijleo.2018.06.014

Cited by 11 publications

(1 citation statement)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cost of LEDs has significantly decreased due to advancements in LED manufacturing technology, and as a result, they are widely employed in many diverse applications, including display backlighting, residential illumination, traffic lighting, and urban landscape lighting [53,54]. The different mathematical model and simulation of the street lamp is discussed in detail in [55], where the rated voltage and power are 18 V and 25 W. Among the five methods, the six-term Gaussian fitting method has the best fitting performance and it is expressed by…”

Section: Mathematical Representation Of the Ledmentioning

confidence: 99%

Energy Management of Hybrid DC Microgrid with Different Levels of DC Bus Voltage for Various Load Types

et al. 2023

View full text Add to dashboard Cite

This article suggests a hybrid DC microgrid (HDCMG) with different levels of DC bus voltages to use for various types of loads. The available sources in the HDCMG are wind generating systems (WGSs), photovoltaic (PV) systems, battery banks, and the AC grid for emergencies. The various levels of the DC bus voltages are 760 V, 380 V, and 48 V for different application uses such as electric vehicles and home applications. In addition, the controller plays an important role in the proposed system to achieve the desired DC bus voltage levels and extract the maximum power point (MPP) from the WGS and PV systems. In order to check the power continuity for the critical loads and improve the overall system performance, a suggested energy management strategy (SEMS) is developed. The SEMS is based on the optimum generated power and the state-of-charge (SOC) of the battery banks. Further, the SEMS is developed as a way to prevent battery storage from overcharging and deep discharging. The mathematical relations of the proposed HDCMG and MPP tracking are described. The bidirectional 3-Φ inverter connects the 760 V bus voltage to the AC grid for regulating this DC bus by absorbing the excess power or supplying the required power during the shortage in the generation and the low SOC of the battery storage. Buck converters with controlled duty cycles rather than constant duty cycles are used to obtain 380 V and 48 V from 760 V to achieve better dynamic responses. The overall HDCMG is evaluated using the MATLAB/Simulink package under different working cases to verify the capability of the control system and the PEMS. The obtained results are discussed and show the good performance and the capability of the overall system under the different scenarios, including (i) a comparison between variable duty and constant duty; (ii) high/low generated power and the SOC of the battery in the acceptable region; (iii) high/low generated power and the SOC of the battery in the critical region; and (iv) high/low generated power and the SOC of the battery in the overcharging region.

show abstract

Section: Mathematical Representation Of the Ledmentioning

confidence: 99%