An investigation of PLL synchronization techniques for distributed generation sources in the grid-connected mode of operation

Kulkarni, Shreeram V; Gaonkar, D. N.

doi:10.1016/j.epsr.2023.109535

Cited by 7 publications

(1 citation statement)

References 14 publications

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“…The frequency usually can be chosen to be a fixed value, that is, in stand-alone operation, or subject to an outer loop, that is, PLL or droop control. 74 In the literature, as a PCS, a current control loop is designed to inject a referenced current value. As a VCS, the current loop is controlled by an outer voltage loop realizing a double voltage control loop which introduces quite enhanced performance in terms of speed, robustness, and disturbance rejection compared with a single loop voltage control which suffers from resonance issues and low stability margins.…”

Section: Voltage/current Controllermentioning

confidence: 99%

A review of recent control techniques of drooped inverter‐based AC microgrids

Issa,

Sharkh,

Abusara

2024

Energy Science & Engineering

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As the penetration of distributed generation (DG) systems in the grid is increasing, the challenge of combining large numbers of DGs in the power systems has to be carefully clarified and managed. The control strategy and management concept of the interconnected systems should be flexible and reliable to handle the various types of DGs. This can be suitably met by microgrids. This paper introduces the microgrid structure and elements and states the main objectives that should be achieved by the microgrid controllers and each DG controller in both operation modes (grid‐connected and island mode). It also presents the challenges of having multiple DG units in a microgrid in terms of accurate power control/sharing, voltage and frequency regulation, power management between DGs, different renewable energy sources integration and deployment, seamless mode transfer, and the modeling issues. The centralized and decentralized control techniques as potential solutions have been discussed and compared by highlighting the advantages and disadvantages of each. Furthermore, the recent control techniques for drooped alternating current microgrids and the main proposed solutions and contributions in the literature have been exposed to finally overcome the droop control limitations and obtain a flexible and smart distributed power system.

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Section: Voltage/current Controllermentioning

confidence: 99%