Robust PI control of a grid-connected voltage source inverter for virtual inertia response in weak grid conditions

Ally, C. Z.; Jong, E.C.W. de

doi:10.1109/sest.2019.8848990

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…This C variation is equivalent to the short circuit ratio of 90 (strong grid) to < 1 (weak grid). [36] Fig . 12 shows damping performance with RPC and best choice of p = −0.9.…”

Section: Simulation Results For Equivalent Parameter Variationmentioning

confidence: 99%

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Direct synthesis and systematic design of a multi‐objective controller for grid‐connected inverters under weak grid conditions

Raja

Umamaheswari

Shanmugam³

2020

IET power electron.

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A systematic approach for synthesis and tuning of the controller for grid-connected inverters with LCL-filter is proposed in this study. The design objectives like current tracking, harmonics rejection, resonant damping and extended stability over wide grid variations are addressed. Controller structure is synthesised by direct synthesis approach which leads to a systematic design procedure and tuning method. Low-frequency approximation of the system under worst grid condition is used for the synthesis of the current controller and the resonance component is handled separately. Tunable parameters are identified to investigate grid variations in the process of augmenting the synthesised controller for realisability. Complete design, stability analysis and tuning are dealt with directly in the discrete domain. Detailed simulation and experimental validation are carried out on a 1 kW prototype inverter. The method proposed in this study serves as a simplified design tool for effective design of a multi-objective controller for grid-connected inverters. Nomenclature G po actual plant transfer function G p approximated plant transfer function G c , G c, h3 proposed tracking and harmonic controllers (nonrealisable) G c ′, G c, h3 ′ augmented controller transfer functions (realisable) G c ʹʹ final cascaded controller D, D h3 desired closed-loop transfer function for tracking and harmonics rejection D′ modified closed-loop transfer function G PR PR controller transfer function [32] G ad damping controller in literature [33]

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“…This C variation is equivalent to the short circuit ratio of 90 (strong grid) to < 1 (weak grid). [36] Fig . 12 shows damping performance with RPC and best choice of p = −0.9.…”

Section: Simulation Results For Equivalent Parameter Variationmentioning

confidence: 99%

“…This C variation is equivalent to the short circuit ratio of 90 (strong grid) to < 1 (weak grid). [36]…”

Section: Analysis and Simulation Resultsmentioning

confidence: 99%

Direct synthesis and systematic design of a multi‐objective controller for grid‐connected inverters under weak grid conditions

Raja

Umamaheswari

Shanmugam³

2020

IET power electron.

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Optimal Quick-Response Variable Structure Control for Highly Efficient Single-Phase Sine-Wave Inverters

Chang¹,

Cheng²,

Chang³

et al. 2021

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This paper puts forward an optimal quick-response variable structure control with a single-phase sine-wave inverter application, which keeps harmonic distortion as low as possible under various conditions of loading. Our proposed solution gives an improvement in architecture in which a quick-response variable structure control (QRVSC) is combined with a brain storm optimization (BSO) algorithm. Notwithstanding the intrinsic resilience of a typical VSC with respect to changes in plant parameters and loading disruptions, the system state convergence towards zero normally proceeds at an infinitely long-time asymptotically, and chattering behavior frequently takes place. The QRVSC for ensuring speedy limited-time convergence with the system state to the balancing point is devised, whilst the BSO will be employed to appropriately regulate the parametric gains in the QRVSC for the elimination of chattering phenomena. From the mix of both a QRVSC together with a BSO, a low total harmonic distortion (THD) as well as a high dynamic response across different types of loading is generated by a closed-loop inverter. The proposed solution is implemented on a practicable single-phase sine-wave inverter under the control of a TI DSP (Texas Instruments Digital Signal Processor). It has experimentally shown the simulation findings as well as the mathematical theoretical analysis, displaying that both quick transient reaction as well as stable performance could be obtained. The proposed solution successfully inhibits voltage harmonics in compliance with IEEE 519-2014’s stringent standard of limiting THD values to less than 5%.

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Robust PI control of a grid-connected voltage source inverter for virtual inertia response in weak grid conditions

Cited by 2 publications

References 10 publications

Direct synthesis and systematic design of a multi‐objective controller for grid‐connected inverters under weak grid conditions

Direct synthesis and systematic design of a multi‐objective controller for grid‐connected inverters under weak grid conditions

Optimal Quick-Response Variable Structure Control for Highly Efficient Single-Phase Sine-Wave Inverters

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