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The proposed research involves Mathematical modeling for first order process with dead time using various tuning methods for industrial applications. Different tuning methods are proposed. Proposed method selection depends on plant operating conditions and also depending upon the process dynamics. The PID controller is most widely used for industrial process control. Modeling were developed for modified internal control model [4-6] in this proposed research. The proposed work is the modeling and simulation of three different first order processes with dead time. The standard controller tuning method is used to obtain the steady state response of first order with dead time.

The proposed research involves, an implementation of solar photovoltaic array and battery powered enhanced dc-dc converter using B4-inverter fed brushless dc motor drive system for agricultural water pumping applications. It consists of step up and step-down converter, DC-link module. DC-link switching is achieved by reduced ripple voltage which results in improved quality of obtained output power. The Three Port Converter has been proposed and operated in unidirectional and/or bidirectional way simultaneously, for achieving an inherent dual voltage and power flow control. Switch count makes the system more cost effective. An excellent tracking performance under dynamic condition with negligible oscillations around optimum operating point is achieved. Optimally selecting the initial value of duty ratio and its perturbation size offer soft starting of BLDC motor by slowly increasing the DC-link voltage of VSI. A simulation model of solar photovoltaic array and battery powered enhanced DC-DC converter is developed and its performance is analysed for various operating conditions.

Inverters are basically power electronics devices that are used to convert DC power to AC at a required frequency and voltage level. Their main application area in real-time is in high voltage and high-power applications in which the switching stress as well as total harmonic distortion must be low. Multilevel inverter technology has been emerging in recent times, as a very important substitute in for high-power medium-voltage energy governed devices. Multi-level inverters also have a major role in interconnected grid systems used nowadays. There are several major topologies of multilevel inverters that exist in literature: Diode clamped (DMLI) (aka neutral-point clamped), and Flying capacitor multilevel inverter (FCMLI) (aka capacitor-clamped) [1] and Cascaded H-bridges converter (CMLI) (i.e., cascaded multicell using separate dc sources). This paper discusses the principal benefits and drawbacks of increasing the number of levels of the inverter and how it has an effect on the efficiency and losses in the MLI architecture and how this difficulty as well as the overall performance of the systems can be improved using a novel Bridged-Cascaded H-bridge MLI topology. There are n-level inverter topologies possible. The paper proposes a novel bridged-insert cascaded MLI topology. The focus of the paper is on 5-level inverter topologies. The simulation has been carried out using MATLAB/Simulink.