Adaptive Tuning of PV Generator Control to Improve Stability Constrained Power Transfer Capability Limit

Priyamvada, IRS and Das, S (2022) Adaptive Tuning of PV Generator Control to Improve Stability Constrained Power Transfer Capability Limit. In: IEEE Transactions on Power Systems, 37 (3). pp. 1770-1781.

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Abstract

The stability of power systems can largely limit the power transfer capability limit of transmission lines. The PV generator control is different from synchronous generator control. The impact of PV generator dynamics on the power transfer limit constrained by stability is not well explored in the literature. This paper focuses on improving the stability constrained power transfer capability limit of transmission lines emanating from PV generators. The PV generator is provided with dc link voltage and reactive power control and is equipped with low voltage ride through capability, voltage and frequency support functionalities. In this paper, Lyapunov function analysis based adaptive tuning laws are proposed for PV control parameters to improve the power transfer capability limit (constrained by stability) of transmission lines connecting PV generators to grid. The tuning laws are proposed for Phase Locked Loop (PLL), outer and inner control loop parameters. The proposed tuning laws have inherent robustness towards faults, changes in solar irradiation, changes in grid topology, network impedances, generation and loads in the system. The effectiveness of the proposed method is validated on a Single PV-Synchronous Machine system, modified IEEE-39 and IEEE-118 bus system. The performance of the proposed method is investigated considering various disturbances such as symmetrical and asymmetrical faults on transmission line, switching of a transmission line and change in solar irradiation of PV. Comparison with existing method shows that the proposed tuning method can achieve higher power transfer capability limit considering stability.

Item Type:	Journal Article
Publication:	IEEE Transactions on Power Systems
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords:	Adaptive control systems; Electric power system control; Electric power system stability; Electric power transmission; Energy transfer; Lyapunov functions; Phase locked loops; Power control; Reactive power; Stability criteria, Adaptive tuning; Generator; Photovoltaics generations; Power systems stability; Power transfer capability; Power transfer limits; Power transmission lines; PV generators; Stability criterions; Tuning, Electric lines
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	24 Jun 2022 11:40
Last Modified:	24 Jun 2022 11:40
URI:	https://eprints.iisc.ac.in/id/eprint/73673

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