Performance analysis of standalone photovoltaic power generation in different load conditions in India

The conversion of solar energy into electrical energy by the design of energy-efficient way is the key objective of this paper, which can be used as a main source of power for the main building of Polytechnic Institute to meet its daily energy requirement by replacing the all exist-ing fluorescent lighting loads to LEDs. The main purpose to choose a standalone photovoltaic system is due to the huge power cut in this location. This institute is situated in a rural area of West Bengal, India. The use of photovoltaic power relies upon assortment factors, such as structuring, topographical area, climate condition, sun-based irradiance, and burden utilization. Point by point use examinations including the two sorts of lighting burden, establishment, and upkeep of sun-based PV framework amid its life expectancy has been completed. Moreover, the analysis has two dimensions, one is cost comparison and payback calculation with respect to energy by replacement of load and another is, though the initial investment is high in a off-grid photovoltaic system, during the life span of the scheme, it not only returns this capital in-vestment but also gains substantial dividend.

The concept of a maintenance-free drive-thru inspection station for commercial vehicles

The article presents the concept of a maintenance-free inspection station intended for conducting drive-thru tests of commercial vehicles. The main purpose of building this type of diagnostic line is to carry out non-invasive, preliminary tests of heavy-duty vehicles entering the vehicle service area in terms of parameters affecting the safety of their operation in relation to the applicable standards. The main parameter to be assessed will be the concentration of toxic exhaust components, measured using remote sensing methods. In addition, the proposed diagnostic line can be supplemented with additional remote measurement systems, such as, for example, systems for assessing the condition of vehicle lighting, loads on individual axles and individual wheels of the vehicle, tire pressure, thermal load of the brake system, as well as a system for detecting leaks of fluids from the vehicle. Based on the carried out work, it has been shown that using the current specialist knowledge and the components of measurement systems available on the market, it is possible to develop an innovative diagnostic line using remote measurement methods.

Dimmable High Power LED Driver Using Fuzzy Logic Controller

The use of lighting loads is one of the crucial matters which increases every year. The increasing use then leads to the development of brighter and longer-lasting sources. In addition, the conventional use of lighting loads today, which only emit light at its maximum intensity, does not allow the consumers to adjust the brightness level as needed. Consequently, this condition may cause energy wastage. The LED lighting system is gaining popularity as it is widely used in a wide range of applications. The advantages of LEDs, such as its compact size and varied lamp colors, replace conventional lighting sources. The linear setting of the driver topology using the flyback converter was aimed to control the LEDs with a constant current in order to adjust the variation of the LED light intensity. The closed-loop driver circuit with flyback converter topology was designed as an LED driver with a given load specification from the LED string. A dimmable feature was included for adjusting the intensity of the light produced by the LEDs. Eventually, the fuzzy logic controller (FLC) method was applied to the integrated change setting to obtain a dynamic response.

Optimizing the Artificial Lighting in a Smart and Green Glass Building-integrated Semi-Transparent Photovoltaics: A Multifaceted Case Study in Egypt

Numerous increases in CO2 emissions are recognizable nowadays. Consequently, building integrated photovoltaics (BIPV) glows up as a trendy future solution. BIPVs are introduced by substituting one of the building components with a green energy harvesting source seeking for sustainability. Herein, we propose a BIPV techno-economic feasibility by utilizing in-Lab fabricated semi-transparent solar cells as a glass interface. Three alternatives have been taken into consideration with proposing on-roof Photovoltaic (PV) system (alternative #1) and semi-transparent solar cells working as glass interfaces (alternative #2) while keeping the governmental grid as a reference alternative (alternative #3). Daylight simulations and electric lighting loads optimization are investigated showing an overall energy budget per alternative. An optimum alternative with an overall excess energy of around 88 MWh as annual energy production was reached, while satisfying 100% of the targeted electrical loads. Levelized cost of energy (LCOE) is demonstrated as an economic parameter to evaluate the three proposed alternatives.

New approach for sizing of overloaded-capable battery for Microgrid frequency control using cooperation of PVs, BESS and smart lighting loads

The frequency control of an islanded microgrid is consisted of primary frequency control (PFC) and secondary frequency control (SFC). This paper proposes a novel cooperative application of Battery Energy Storage System (BESS), Photovoltaic (PV) systems and LED lighting loads (LEDLLs) to quickly intercept frequency deviation in the stage of PFC. The slow responding distributed generators handle SFC by restoring the frequency to its nominal value. For participation in PFC, in the case of power shortage, LEDLLs decrease their power consumption, and in the case of power surplus, the PVs decrease their power generation. While PVs and LEDLLs are participating in PFC with their maximum capability, the BESS frequency controller is tuned to inject/absorb enough power in both cases to keep the frequency within safe limits. In this paper for battery sizing, instead of using its nominal power, a modified overloading capability to fast discharge/charge is used to reduce the required battery size for PFC that also prevents damaging it during fast discharge/charge for PFC. The proposed approach is evaluated on the CIGRE low voltage microgrid using MATLAB/Simulink software. Simulation results show that besides the overloading characteristics, the cooperative utilization of BESS, PVs and LEDLLs also reduce the battery size.

Impact of Nonlinear Lighting Loads on the Neutral Conductor Current of Low Voltage Residential Grids

In the last decade, mainly due to political incentives towards energy efficiency, the share of lamps with power electronic interfaces, like Compact Fluorescent Lamps (CFL) and Light Emitting Diode (LED) lamps, has significantly increased in the residential sector. Their massive use might have a substantial impact on harmonic currents and, consequently, on the current flowing in the neutral conductor. This paper analyzes the impact of modern energy-efficient lighting technologies on the neutral conductor current by using a synthetic Low Voltage residential grid. Different load scenarios reflecting the transition from incandescent lamps, via CFL, to LED lamps are compared concerning the neutral conductor current at different points in the network. The inherent randomness related to the use of lighting devices by each residential customer is considered employing a Monte Carlo simulation. Obtained results show that the use of CFL has a greater impact on the neutral conductor current of Low Voltage (LV) residential grids and that, with increasing use of LED lamps, a decreasing impact can be expected in the future.