Diagnosis and mitigation of voltage and current sensors malfunctioning in a grid connected PV system
| Autor: | Nishad Mendis, Md. Enamul Haque, Sajeeb Saha, Mohammad Taufiqul Arif, S. Lyden, Md. Apel Mahmud, Chee Pin Tan |
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| Rok vydání: | 2020 |
| Předmět: |
Observer (quantum physics)
Computer science 020209 energy 020208 electrical & electronic engineering Photovoltaic system Energy Engineering and Power Technology Hardware_PERFORMANCEANDRELIABILITY 02 engineering and technology Grid Fault (power engineering) Maximum power point tracking Fault mitigation 0202 electrical engineering electronic engineering information engineering Electronic engineering Electrical and Electronic Engineering Current (fluid) Voltage |
| Zdroj: | International Journal of Electrical Power & Energy Systems. 115:105381 |
| ISSN: | 0142-0615 |
| DOI: | 10.1016/j.ijepes.2019.105381 |
| Popis: | Accuracy of sensors measuring Photovoltaic (PV) array output voltage, current and the ac currents flowing between VSC and grid plays an indispensable role in efficient operation of a grid connected PV system. Erroneous measurements due to malfunctioning of aforementioned sensors can cause significant disruptions in the operation of a PV system, as the impact of erroneous measurements propagate through the controllers in a PV system. In this paper, malfunctioning of PV system sensors are regarded as sensor faults. This paper presents an approach for diagnosis and mitigation of sensor faults in a PV system. The fault diagnosis approach is based on the sliding mode observer (SMO)-based fault detection and identification theory, which is capable of accurately estimating faults in sensor measurements. Estimated faults are used by the fault mitigation technique in the proposed approach to rectify the sensor measurements. The rectified sensor measurements are used by the controllers in PV system, instead of possibly erroneous sensor measurements, which ensure fault resilient operation of the PV system. The efficacy of the proposed approach has been validated through rigorous simulation and experimental studies. |
| Databáze: | OpenAIRE |
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