Abstract
The novelty behind the research in this paper is to investigate the Super Twisting Sliding Mode Controller (ST-SMC) for efficiently injecting both active and reactive power under normal and abnormal operating conditions for a three-phase grid-connected photovoltaic (PV) system. The ST-SMC is aimed to inject sinusoidal current to the grid with low Total Harmonic Distortion (THD), to avoid chattering with easy real implementation, and to enhance the quality of disturbance rejection and sensitivity to parameter variation. The test under normal conditions includes initialization, steady state behavior, dynamic behavior, and interrupting the injection of acting and reactive power while the abnormal conditions consists of voltage sag, voltage swell, frequency variation, DC-link variation, and inclusion of 5th harmonics, etc. The phase lock loop used for synchronization is based on a synchronous reference frame that works well under distorted grids and nonideal. Automatic code is generated in PSIM 9.1 for hardware implementation in the DSP board TMS32F28335 from Texas Instruments while code composer studio 6.2.0 is used for debugging. The real time testing is executed using Typhoon Hardware in Loop (HIL) 402 device on the DSP board. The results authenticate the fastness, effectiveness, and robustness for both steady state and dynamic behavior under various scenarios of the designed controller.
Highlights
Exponential decrease in fossil fuel, rapidly varying climate, and high electric power demand are currently severe problems due to the abruptly increasing population throughout the world.To fulfill the power demand, the alternative way is to adopt Renewable Energy Resources (RER) [1,2].An abrupt growth has been seen in Solar Photovoltaic (SPV) system by the past several years; its importance will be further increased in the near future as its integration with the grid becomes more sophisticated [3,4,5]
A grid-connected PV system is composed of PV array which takes solar irradiance as input and generates electric power as output and another part is power electronic-based converters, which are responsible for the extraction of power from PV array and interconnection with grid [6]
In grid-connected inverters, the practical implementation of some tests is difficult due to the fact they require alterations in the grid conditions or filter or in the inverter; this can be executed in Hardware in Loop (HIL)
Summary
Exponential decrease in fossil fuel, rapidly varying climate, and high electric power demand are currently severe problems due to the abruptly increasing population throughout the world.To fulfill the power demand, the alternative way is to adopt Renewable Energy Resources (RER) [1,2].An abrupt growth has been seen in Solar Photovoltaic (SPV) system by the past several years; its importance will be further increased in the near future as its integration with the grid becomes more sophisticated [3,4,5]. Exponential decrease in fossil fuel, rapidly varying climate, and high electric power demand are currently severe problems due to the abruptly increasing population throughout the world. To fulfill the power demand, the alternative way is to adopt Renewable Energy Resources (RER) [1,2]. An abrupt growth has been seen in Solar Photovoltaic (SPV) system by the past several years; its importance will be further increased in the near future as its integration with the grid becomes more sophisticated [3,4,5]. A grid-connected PV system is composed of PV array which takes solar irradiance as input and generates electric power as output and another part is power electronic-based converters, which are responsible for the extraction of power from PV array and interconnection with grid [6]
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