Computational Intelligence based Regulation of the DC bus in the On Grid Photovoltaic System

Mauridhi Hery Purnomo
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Institut Teknologi Sepuluh Nopember Surabaya


Bidirectional DC/AC converter control system based on vector control method for regulating the DC bus in the On-grid photovoltaic system is presented. In this control sheme, the main role of the DC/AC converter is to control the power flow between the DC bus and the electrical grid. To avoid the difficulty for tuning controller parameter and in addition to enhance transient performance of the DC bus voltage response that caused by abrupt changes of the local dc load that directly connected to DC bus system, in this works, the DC/AC converter is controlled by utilizing a kind of the computational intelligence method that is radial basis function neural networks. By using a fix simple proportional gain control topology, the proposed controller can fastly damp overshoot and undershoot of the dc bus voltage that caused by sudden connection and disconection of the local dc load so the overvoltage condition of the dc link capacitor in this case could be avoided. The simulation results show the effectiveness of the proposed control system.

Keywords: bidirectional DC/AC converter, vector control, computational intelligence, radial basis function neural networks


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