A Review on Active-Power-Sharing Techniques for Microgrids

Rizvi, Syed Tahir Hussain; Abu-Siada, A.

doi:10.3390/en16135175

Cited by 4 publications

(2 citation statements)

References 46 publications

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“…The operation of islanded microgrids can be significantly affected by faults or the switching of various types of loads. A variety of control schemes have been proposed in the literature to address these phenomena (Naderipour et al 2023;Rizvi et al 2023;Lin et al 2020). Major forms of control are droop and resonant controllers.…”

Section: Research Articlementioning

confidence: 99%

Virtual oscillator with delayed feedback for transient mitigation in inverter-based islanded microgrids

Salim,

Babu,

Krishna

2024

Int. J. Renew. Energy Dev.

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In recent years, the conventional control schemes for renewable energy-based inverter-dominated microgrids have been expeditiously replaced by Virtual Oscillator-based Control (VOC). The method of VOC ensures fast synchronisation and efficient load-sharing capabilities in inverter-based renewable energy systems. This work evaluates the effectiveness of VOC-based inverters in mitigating the transient dynamics of power system parameters like voltage, frequency and current under different types of switching events involving active and reactive load combinations. Further, to enhance the control efficiency of VOC under such load-switching scenarios a modified form of VOC is proposed utilizing the ability of the feedback mechanism to strengthen the state space trajectory of dynamical systems. In the proposed method, the control oscillator of conventional VOC driven by the inverter current is modified by providing a feedback signal in the form of an integral function of the error between the drive oscillator and the trajectory of the inverter output. The efficiencies of different forms of feedback are quantified in terms of percentage deviation in power system parameters as well as THD. The proposed feedback strategy can improve the control performance by bringing down the voltage deviation from 57 % in conventional VOC to around 4%. Likewise, the frequency deviation is brought down to 0.14% from 19.26 %. These advantages are achieved without any significant adverse impact on the THD. The proposed approach can be utilized in multi-inverter-based systems serving sensitive loads in microgrids.

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Section: Research Articlementioning

confidence: 99%

Virtual oscillator with delayed feedback for transient mitigation in inverter-based islanded microgrids

Salim,

Babu,

Krishna

2024

Int. J. Renew. Energy Dev.

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“…With improvement in people's living standards, new requirements have been put forward for power supply reliability of the power grid. The traditional closed-loop design and open-loop operation of the distribution network will change, and the index of the closed-loop rate of the distribution network is proposed (Qi et al, 2020;Hao et al, 2023;Jinwei et al, 2023;Rizvi and Abu-Siada, 2023). Since the two feeders that form a closed loop may come from different sub-stations or different outlets of the same sub-station, after the formation of the loop network operation, there must be a circulating current potential.…”

Section: Introductionmentioning

confidence: 99%

Research on the minimum network loss optimization control strategy of the active distribution network based on the distributed power flow controller

Liu,

Wang,

Guo

et al. 2024

Front. Energy Res.

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With large-scale access to distributed new energy, the power flow form of the distribution network tends to be complex. The distribution loop network rate increases, resulting in serious circulation of the distribution network, which places significant pressure on the loss of the distribution network. The problem of network loss change caused by distributed new energy grid connection, coupled with the inconsistency between load fluctuation and output power change of distributed new energy, will have a significant impact on the safety, reliability, and economic operation of the distribution network. Therefore, it is urgent to have good economic and technical means of power flow control. This paper proposes a minimum network loss optimization control strategy for active distribution networks based on a distributed power flow controller. First, according to the characteristics of the distribution network load and the new energy power supply along the distribution line, the multiple sub-modules of the distributed power flow controller are arranged in sections in the distribution loop network line. The regulation effect of the distributed power flow controller on the voltage and power flow of the distribution loop network is analyzed. The loop network current equation and power loss equation after the distributed power flow controller are constructed, and the power equation with the minimum active loss of the active distribution loop network is derived. Second, the control strategy for minimum network loss of the active distribution network based on the distributed power flow controller is proposed. Finally, the simulation model of the active distribution loop network is constructed by PSCAD/EMTDC. The loss of the loop network before and after the distributed power flow controller is simulated and analyzed, and the effectiveness of the proposed strategy is verified.

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Empowering communities beyond wires: Renewable energy microgrids and the impacts on energy poverty and socio-economic outcomes

Tamasiga,

Onyeaka,

Altaghlibi

et al. 2024

Energy Reports

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A Review on Active-Power-Sharing Techniques for Microgrids

Cited by 4 publications

References 46 publications

Virtual oscillator with delayed feedback for transient mitigation in inverter-based islanded microgrids

Virtual oscillator with delayed feedback for transient mitigation in inverter-based islanded microgrids

Research on the minimum network loss optimization control strategy of the active distribution network based on the distributed power flow controller

Empowering communities beyond wires: Renewable energy microgrids and the impacts on energy poverty and socio-economic outcomes

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