An improved robust coupled sliding mode control strategy for solar photovoltaic‐based single‐phase inverters

Summary Solar photovoltaic (SPV)‐based single‐phase inverters are universally accepted and commercially utilized renewable power converter system. Generally, the magnitude of the inverter output is perturbed on load variations, and the intermediate DC‐DC boost converter output is perturbed because o...

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Bibliographic Details
Published in:International journal of circuit theory and applications 2023-05, Vol.51 (5), p.2163-2185
Main Authors: S, Sanal Kumar, S, Palanivel, MS, Kamalesh
Format: Article
Language:English
Subjects:
Coupled modes
coupled sliding mode controller
DC‐DC boost converter
Electric potential
Inverters
Load fluctuation
Power converters
Robust control
single‐phase inverter
Sliding mode control
solar PV system
Voltage
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Summary:Summary Solar photovoltaic (SPV)‐based single‐phase inverters are universally accepted and commercially utilized renewable power converter system. Generally, the magnitude of the inverter output is perturbed on load variations, and the intermediate DC‐DC boost converter output is perturbed because of the solar availability. The main intermediary component is the DC‐Link capacitor. The regulation of DC‐Link voltage is the key factor in maintaining the stability of the system with bilateral power converters. In the existing methods, individual Sliding Mode Control (SMC) are used to maintain the stability of the converters independently. However, the individual SMC's do not have any corelated control to address the common problem of DC‐Link voltage regulation. This paper proposes an alternative solution with Coupled SMC (CSMC) to address the problem of regulating the DC‐Link voltage. Both the Boost‐SMC and Inverter‐SMC are individually developed and controlled in a unified approach by having mutual adjustments in the converter and inverter switching pulses. The CSMC strategy is developed in Matlab and experimented using dSPACE‐MicrolabBox. The validation tests are compared with conventional SMC, which shows the betterment of CSMC in robustness and waveshape tracking. This paper proposes a Coupled Sliding Mode Control (CSMC) to address the problem of regulating the DC‐Link voltage in a boost stage single phase inverter. Both the Boost‐SMC and Inverter‐SMC are individually developed and controlled in a unified approach by having mutual adjustments in the converter and inverter switching pulses.
ISSN:0098-9886
1097-007X
DOI:10.1002/cta.3542