A control strategy to enhance the life time of the battery in a stand‐alone PV system with DC loads

Maheswari, L.; Rao, P. Srinivasa; Sivakumaran, N.; Ilango, G. Saravana; Nagamani, C.

doi:10.1049/iet-pel.2016.0735

Cited by 20 publications

(7 citation statements)

References 31 publications

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“…Xiao et al [24] developed an effective sizing of battery and DG along with a dynamic power-sharing strategy by extracting low and highfrequency fluctuations from DC bus. Diverting the oscillatory current component to the battery directly impacts its life since it is prone to abrupt charge and discharge conditions with variable rates [25].…”

Section: Literature Reviewmentioning

confidence: 99%

Effective power management scheme for PV‐Battery‐DG integrated standalone DC microgrid

Pannala

Padhy

Agarwal

2020

IET Electric Power Applications

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Standalone DC microgrids (SDCMGs) are emerging as prominent solutions to remote customers. As these SDCMGs mainly depend on renewable energy sources to curb carbon emission, reliability of the system is lessened due to their intermittent nature. The battery could offer a solution to this problem as it is inherently enclosed by DC grid for power balancing, but the purpose may not be served completely due to high capital cost and maintenance. Thus, the diesel generator (DG) becomes a major alternative to overcome this issue because of low investment, high compatibility, and flexibility. However, DG inhibits with cranking delay, sluggish response and low fuel efficiency under frequent switching and variable loading scenarios. To suppress the issues, a new power management strategy (PMS) is developed to ensure proper coordination between different sources, storage devices and loads in SDCMG. In addition to this, an effective control scheme is also proposed to achieve seamless regulation of DC bus voltage even under extreme conditions. In this study, different SDCMG configuration is considered for testing and simulation of system is carried out in real‐time digital simulator to prove their viability. A scaled prototype is developed to validate simulation results and authenticate proposed PMS and control scheme.

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Section: Literature Reviewmentioning

confidence: 99%

Effective power management scheme for PV‐Battery‐DG integrated standalone DC microgrid

Pannala

Padhy

Agarwal

2020

IET Electric Power Applications

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“…As shown in Fig. 2, the actual size of the photovoltaic power generation module is 1640 × 992 mm 2 , and it is composed of 60 single-crystal silicon cells. One of them is listed as 6, totaling 10 rows.…”

Section: (1) Photovoltaic Power Generation Modulementioning

confidence: 99%

“…Because of the above reasons, the development and demand for renewable energy will increase daily. (1)(2)(3)(4)(5) Among the different types of renewable energy, photovoltaic energy is undoubtedly the ideal green energy for sustainable development. Because of the advantages of endless sunlight, inexhaustible use, pollution-free and simple setup, no labor exploitation, easy expansion of power generation capacity, high reliability, and emergency power supply suitable for remote areas as backup capacity, photovoltaic energy is suitable for ecological conservation, environmental protection, and carbon dioxide emission suppression.…”

Section: Introductionmentioning

confidence: 99%

Application of Supercapacitors in Photovoltaic Power Generation System

Wu¹,

Li²,

Gu³

et al. 2019

Sensors and Materials

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In view of the intermittent and unstable output voltage of the photovoltaic power generation module, a supercapacitor is designed as the control system to improve the power quality and power supply continuity of the photovoltaic power generation system. The whole circuit includes a maximum power point tracking converter, a boost converter, a Hall element, a waveform recorder, and a supercapacitor bank. Because the output current of each solar photovoltaic module is very important for the control of the solar power generation system with a supercapacitor bank, a sensing circuit for accurately detecting the output current and current change rate of the solar power generation system is presented. When the sunshine is sufficient, the control system dispatches the output current of the solar photovoltaic module and provides power to the supercapacitor bank and the load terminal; when the sky is cloudy, the control system discharges the energy stored in the supercapacitor as an uninterruptible power source and provides power to the load such that the load terminal voltage is stable. The measured results show that the control system can effectively suppress the output voltage fluctuation of the photovoltaic power generation module, improve the power quality, and enhance the reliability of load power consumption.

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“…), so there is a need to add a boost DC-DC converter which gives high voltage gain at a cost of reduced efficiency. To solve the UPS problem at night, it is essential to use battery [5], [6] to store excess energy, and to act as a backup energy source in case of less or no sun irradiations. But batteries have their own problems, i.e.…”

Section: Introductionmentioning

confidence: 99%

A Technique for Better Energy Management of Single-Stage Topology of Stand-Alone Photovoltaic System

Azeem

Murtaza

Abbas

et al. 2020

IJIE

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This paper proposes a technique for the energy management of a stand-alone photovoltaic system. The proposed system employs a power processing inverter that has a high PV voltage at the input to mitigate the magnitude of AC signal at the output, thus eliminating the use of DC-DC converter and reducing the input capacitor size of PV array. To meet the power requirement of load and to maintain the maximum power point operation of PV array, a battery bank is utilized with a bi-directional converter. An impedance model of the complete system is executed. Based on the model, the control architecture is designed which works in four modes: 1) if load demands > MPP of PV, additional current is extracted from the battery; 2) if load demands < MPP of PV array, extra current is given to the battery; 3) only load management is utilized since the battery bank is not available because of overcharging or under-charging; 4) if irradiation varies then the first mode is used for load requirement. The technique is designed which guarantees the maximum power point tracking of the PV system even without using any intermediate stage of a DC-DC converter, hence making it a single-stage system. MPPT is achieved by effectively controlling the bi-directional converter used for battery charging and discharging purposes. To ensure better utilization of dc voltage, enhanced efficiency, and low less harmonic distortion, a sinusoidal PWM technique is used to drive the inverter. Simulation results are carried out for ensuring better energy management along with MPPT operation demonstrated under uniform operating conditions.

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A control strategy to enhance the life time of the battery in a stand‐alone PV system with DC loads

Cited by 20 publications

References 31 publications

Effective power management scheme for PV‐Battery‐DG integrated standalone DC microgrid

Effective power management scheme for PV‐Battery‐DG integrated standalone DC microgrid

Application of Supercapacitors in Photovoltaic Power Generation System

A Technique for Better Energy Management of Single-Stage Topology of Stand-Alone Photovoltaic System

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