Informatics Publishing Limited

A. Selwin Mich Priyadharson ¹, G. Siva Kumar ²

Affiliations
1 School of Electrical, Vel Tech Dr. RR & Dr. SR Technical University, Avadi, Chennai - 600 062, IN
2 School of Mechanical, Vel Tech Dr. RR & Dr. SR Technical University, Avadi, Chennai - 600 062, IN

Abstract

An innovative design for controlling the process variable parameters such as flow and level control by implementing gate control of hydroelectric power plant using Progrmmable Logic Controller (PLC) – Human Machine Interface (HMI) based cascaded fuzzy controller scheme is proposed. The existing control schemes have difficulty to cope up with inherent time delay, nonlinearity due to uncertainty of the process and frequent load changes. An experimental setup is fabricated in the laboratory for flow and level control and simulation studies were carried out using PLC – HMI based cascaded fuzzy controller scheme. The Lab scale Experimental set up is provided with five levels in the upper tank and two levels in the lower tank and depending on the level sensor outputs the ladder logic is actuated. This work uses PLC of B&R Industrial Automation inbuilt with 22 digital inputs and provides 14 potential free outputs to control the miniaturized process depicted in the work. The performance of proposed scheme is evaluated by simulation and the results are compared with conventional controllers using real time data obtained from the hydroelectric power plant. The advantages of the proposed scheme over the existing controllers are highlighted.

Keywords

Cascaded Fuzzy Controller, Hydro Electric Power Plant, Ladder Logic, Level Sensor, PLC - HMI.

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M. Hareesh ¹, C. Amarnath ², G. Siva Kumar ³, D. Sreenivasarao ³

Affiliations
1 Research Scholar, Dept. of Electrical Engg., NIT Warangal, TS - 506004, IN
2 Execute trainee, Power Grid Corporation of India Ltd.(POWERGRID), Delhi, IN
3 Assistant Professor, Dept. of Electrical Engg., NIT Warangal, TS - 506004, IN

Abstract

The performance of a photovoltaic (PV) module is affected by irradiance and temperature. Often, it is also affected by partially or completely shaded conditions by passing clouds. This paper presents a MATLAB/SimulinkTM based model to study the I–V and P–V characteristics of a PV panel under partially shaded and non-shaded conditions. And also, Maximum Power Point Tracking (MPPT) of PV module by DC-DC boost converter is explained. The design of boost converter parameters and its affect on power tracking of the PV module are explained. The perturbation and observation (P&O) method is implemented for maximum power extracting from PV panel, because of its easy implementation. The P&O algorithm tune the dc-dc boost converter duty cycle to ensure that PV system operates at MPPT. A 100 W Photovoltaic (PV) panel with dc-dc boost converter is implemented practically for experimental validation. This work is extended for tracking of MPPT during shading conditions also. The P and O algorithm is implemented in DSpace, in which the output power of PV panel compared for every sampled time by varying the duty cycle in small steps.

Keywords

Boost converter, Maximum Power Point Tracking (MPPT), Perturb and Observe (P&O), PV panel

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