Control Strategy for Power Flow Management in a PV System Supplying DC Loads

Rani, Balasubramanian Indu; Ilango, G. Saravana; Nagamani, C.

doi:10.1109/tie.2012.2203772

Cited by 101 publications

(14 citation statements)

References 32 publications

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“…The different performance measures of the proposed control strategy are compared with that of strategies I and II, presented in [26,27], respectively. Table 7 provides the quantitative comparison of the results.…”

Section: Deficit Power Modementioning

confidence: 99%

Power management control strategy for hybrid energy storage system in a grid‐independent hybrid renewable energy system: a hardware‐in‐loop real‐time verification

Krishan

Suhag

2020

IET Renewable Power Generation

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This study proposes a novel control strategy for a hybrid energy storage system (HESS), as a part of the gridindependent hybrid renewable energy system (HRES) which comprises diverse renewable energy resources and HESScombination of battery energy storage system (BESS) and supercapacitor energy storage system (SCESS). The proposed control strategy is implemented into two parts: in the first part, HESS controller is designed and implemented to maintain the active power balance among different constituents of HRES and regulate DC-link voltage (V DC) under surplus power mode and deficit power mode. The low-frequency components of imbalance power are diverted to BESS while the high-frequency components are diverted to SCESS while maintaining the state of charge (SoC) constraints of HESS thereby reducing stress on BESS. In the second part, inverter controller is designed and implemented to maintain AC voltage and frequency within limits in the events of perturbation. The proposed HESS along with its novel control strategy, as implemented in the HRES, is a new proposition in this study. The detailed model of HRES is simulated in MATLAB/Simulink and the results prove the efficacy of the control strategy. Further, hardware-in-loop real-time simulation studies using OPAL-RT real-time simulator demonstrate the feasibility of hardware implementation of HRES with the proposed control strategy.

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Section: Deficit Power Modementioning

confidence: 99%

Power management control strategy for hybrid energy storage system in a grid‐independent hybrid renewable energy system: a hardware‐in‐loop real‐time verification

Krishan

Suhag

2020

IET Renewable Power Generation

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“…In grid-connected photovoltaic installations, the electrical network is perceived as a nearly-infinite storage capacity device, capable of absorbing all the energy generated by a solar array (SA). On the contrary, off-grid systems (often referred to as microgrids) fed by photovoltaic sources require careful sizing and energy management aimed to instantaneously match generation, storage and consumption [1][2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Single-Source Multi-Battery Solar Charger: Analysis and Stability Issues

et al. 2015

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Abstract:In this paper, dynamic analysis of a multi-battery dual mode charger, powered by a single solar array and suitable for lead-acid and lithium-ion cell-based batteries is presented. Each battery is interfaced to the solar array by means of a current-controlled buck power stage, operating either in constant power or constant voltage mode. Operation in former/latter charging mode implies regulating input/output voltage of the converter, which is a non-trivial situation since while feeding different batteries, all the converters share the same input terminals, connected to the solar array. It is revealed that when at least one of the batteries operates in constant power charging mode, open-loop instability occurs whenever converter input voltage is lower than maximum power point voltage of the solar array. Consequently, input voltage regulating controller must be designed to stabilize closed-loop dynamics for the worst case of instability, which is also derived. Moreover, it is shown that the dynamics of the converters operating under output voltage control are perceived as disturbances by input voltage control loop and must be properly rejected. Simple loop shaping design is proposed based on a PI controller, allowing stabilizing the system in case of worst case instability and rejecting output voltage control induced disturbances at the expense of non-constant, operating-point dependent closed-loop damping. OPEN ACCESSEnergies 2015, 8 6428

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“…Even when taking into account typical derating of 30% for non‐STCs, the numbers are still impressive. Nevertheless, because of the intermittent nature of PV supply, solar array (SA) must be hybridized with an appropriate energy storage buffer in order to resolve the mismatch with load demand . The system, developed in this work, includes a portable SA based on hardened high‐efficient monocrystalline silicon cells, utilizing batteries carried by the soldier as energy buffer.…”

Section: Introductionmentioning

confidence: 99%

Single‐source multibattery solar charger: case study and implementation issues

Gadelovits

Sitbon

Suntio

et al. 2015

Progress in Photovoltaics

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In this paper, design process and functionality of a portable single‐panel dual‐battery solar charger prototype are presented, achieving energy density of 571 W h kg−1 during a typical 3‐day infantry mission. The device may instantaneously charge up to two Li‐ion MR‐2791 batteries, supporting plug‐and‐play operation. The system consists of a lightweight custom solar panel, based on 20% efficient monocrystalline photovoltaics, and an intelligent power processing module. The panel contains eight transparent polymer‐encapsulated and camouflaged series‐connected six solar cell packs with antiparallel diodes, allowing partial shading operation. The power processing module consists of two synchronous current‐mode‐controlled buck converters, digital signal processor, and a microcontroller, supporting both maximum power point tracking of the solar panel with partial shading detection and multimode charging of Li‐ion packs while instantaneously communicating with the batteries. Power management algorithmic design is presented, based on ensuring system stability while supporting the required operation modes. System implementation stages and underlying issues are thoroughly discussed, and utilized hardware components are presented in detail. Experimental results of system testing under real outdoor conditions are presented to demonstrate the device functionality and energy yield capabilities. Copyright © 2015 John Wiley & Sons, Ltd.

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Control Strategy for Power Flow Management in a PV System Supplying DC Loads

Cited by 101 publications

References 32 publications

Power management control strategy for hybrid energy storage system in a grid‐independent hybrid renewable energy system: a hardware‐in‐loop real‐time verification

Power management control strategy for hybrid energy storage system in a grid‐independent hybrid renewable energy system: a hardware‐in‐loop real‐time verification

Single-Source Multi-Battery Solar Charger: Analysis and Stability Issues

Single‐source multibattery solar charger: case study and implementation issues

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