Solar PV-BES Based Microgrid System With Multifunctional VSC

Narayanan, Vivek; Kewat, Seema; Singh, Bhim

doi:10.1109/tia.2020.2979151

Cited by 61 publications

(16 citation statements)

References 26 publications

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“…The other condition is unplanned off-grid. In this condition, the grid is often faulty, and the system is cut off from the grid after the anti-islanding protection is triggered [5,7]. Under this condition, the energy storage device may not have time to start.…”

Section: The Strategy Of the Off-grid Conditionmentioning

confidence: 99%

“…The uncertainty of PV power makes it difficult to ensure the reliability of load power supply when it is off-grid [2][3][4][5]. Therefore, a PV power plant (PVPP) is often used in conjunction with an energy storage system (ESS) in practice, which together are called a photovoltaic-battery energy storage system (PV-BES) [3,4,6,7]. Although the system can work completely off-grid in most cases, the system requires a connection to the grid, either to send the power generated by PV into the grid, or to absorb energy from the grid to charge the energy storage battery.…”

Section: Introductionmentioning

confidence: 99%

“…However, the disadvantage of this method is that the control strategy needs to change to switch the control mode between off-grid and grid-connected. Although strategies proposed in previous papers aim to make the process of mode switching as smooth as possible, the power supply of the load is not affected during the switching period [7,[9][10][11][12]. However, when the system encounters unexpected off-grid situations, such as grid failure, the local load experiences short-term power failure [8].…”

Section: Introductionmentioning

confidence: 99%

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A United Control Strategy of Photovoltaic-Battery Energy Storage System Based on Voltage-Frequency Controlled VSG

Yan

Wang

et al. 2021

Electronics

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At present, the installed capacity of photovoltaic-battery energy storage systems (PV-BESs) is rapidly increasing. In the traditional control method, the PV-BES needs to switch the control mode between off-grid and grid-connected states. Thus, the traditional control mode reduces the reliability of the system. In addition, if the system is accidentally disconnected from the grid or the energy storage battery fails to work normally, the DC voltage of the inverter increases or decreases rapidly. To address these two problems, in this paper, a united control strategy is proposed. In the case of grid connection, based on the voltage-frequency controlled VSG strategy, the strategy adjusts the output power of the VSG by changing the position of the primary frequency modulation curve. This method can ensure that, after the system is connected to the grid, excess PV power can be sent to the grid, or power can be absorbed from the grid to charge energy storage. In the off-grid state, the strategy uses FPPT technology and superimposes a voltage component onto the voltage loop to quickly balance the DC power and AC power of the inverter. This strategy can improve the reliability of the system’s power supply if the energy storage fails to work normally. Finally, a PV-BES model was built using MATLAB-Simulink, and the simulation results proved the effectiveness of the proposed strategy.

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Section: The Strategy Of the Off-grid Conditionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A United Control Strategy of Photovoltaic-Battery Energy Storage System Based on Voltage-Frequency Controlled VSG

Yan

Wang

et al. 2021

Electronics

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“…Therefore, the power quality improvement is a significant issue in GTT along with extracting maximum available PV power [16]. The literature [17][18][19][20][21][22][23][24] lists a broad range of methods of identification of harmonic components. The harmonics methods of detection are mainly used in the load current to isolate the fundamental component and harmonics.…”

Section: Introductionmentioning

confidence: 99%

“…LMMN is also introduced in [22] to control a three-phase VSI during the grid connection mode to achieve power quality improvements. In [23] the leaky least mean mixed norm (LLMMN) adaptive filtering technique is introduced which has a good performance to estimate the fundamental load current with smaller oscillation than using LMMN adaptive filtering technique.…”

Section: Introductionmentioning

confidence: 99%

Hardware-in-the-Loop Testing of Seamless Interactions of Multi-Purpose Grid-Tied PV Inverter Based on SFT-PLL Control Strategy

Mansour¹,

Arafa

Marei

et al. 2021

IEEE Access

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This paper introduces a multifunction interactive PV system that has the ability to feed a nonlinear local load in either grid-tied topology (GTT) or off-grid topology (OGT) and transits between the two topologies are seamless. The interactive PV system utilizes a sliding Fourier transform-based phaselocked loop (SFT-PLL) as an adaptive and robust control technique for extracting the fundamental load current. Further, the SFT-PLL is also used to synchronize the inverter output voltage with the grid during the GTT. The proposed synchronization technique has a superior immunity to the weak grid problems. The SFT-PLL based control technique has a very good ability to mitigate the nonlinear load harmonics and to deliver active current to the grid with a unity power factor. Moreover, the proposed control technique is able to keep a balanced grid current when the connected load is unbalanced whether the PV source is available or not. The DC-link voltage is controlled by the controller of the voltage source inverter (VSI) during GTT. During the OGT, the AC load voltage is regulated by the VSI controller while the DC-link voltage is regulated by the boost converter controller to satisfy the power requirements of the connected load. The simulation and experimental results show the effectiveness of the proposed control technique in feeding a balanced current with THD adheres to the IEEE-519 standard at different operating conditions. The performance of the proposed method is compared with recently published adaptive filtering techniques to show its effectiveness especially when the load current has a DC-offset.

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