This paper proposes a robust voltage control strategy for grid-forming (GFM) inverters in distribution networks to achieve power support and voltage optimization. Specifically, the GFM control approach primarily consists of a power synchronization loop, a voltage feedforward loop, and a current control loop.
The GFM inverter is controlled as a voltage source, which achieves control objectives by generating the output voltage amplitude and phase reference. The structure of the control module primarily consists of power control and voltage control.
Based on the power quality requirement that the grid voltage frequency variation should not be greater than 1 % and the voltage amplitude variation should not be greater than 5 %, the minimum permissible angular frequency of the inverter output is 310.86 rad/s and the minimum voltage amplitude is 295.45 V.
Their frequency and voltage control policies must guarantee a synchronised operation, accurate power sharing amongst inverters, and a good transient response. Simultaneously achieving the latter two requirements is in general a non-trivial problem and existing schemes in the literature often focus on one of these two aspects.
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Finally, a proposed control strategy is presented to ensure frequency and voltage regulation. PV systems configurations: (a) …
1 IEEE TPWRS: “Hierarchical Coordinated Fast Frequency Control using Inverter-Based Resources” Summary: Two-stage design: local area control & global coordination
Grid-forming inverters play an important role in supporting power systems with low rotational inertia. Their frequency and voltage control policies must guarantee a synchronised …
Abstract: Grid-forming inverters play an important role in supporting power systems with low rotational inertia. Their frequency and voltage control policies must …
Droop Control: A decentralized strategy that emulates the inertial response of synchronous generators by modulating output frequency and voltage in proportion to active …
This paper proposes a robust voltage control strategy for grid-forming (GFM) inverters in distribution networks to achieve power support and voltage optimization. …
Finally, a proposed control strategy is presented to ensure frequency and voltage regulation. PV systems configurations: (a) centralized, (b) string, (c) multi-string, and (f) …
This paper proposes a robust voltage control strategy for grid-forming (GFM) inverters in distribution networks to achieve power support and voltage optimization. …
Grid-forming inverter-based autonomous microgrids present new operational challenges as the stabilizing rotational inertia of synchronous machines is absent. The design …
This thesis explores the core advantages of grid-forming inverters comparing to conventional inverters, develops mathematical models for voltage and frequency control, and …
Overview In this paper, we propose a simple frequency controller that uses the inverter output current as feedback to adapt its frequency, and also propose controllers for the …
The design of efficient control policies for grid-forming inverters is, however, a non-trivial problem where multiple performance objectives need to be satisfied, including …
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