Rajasthan Technical University

About: Rajasthan Technical University is a education organization based out in Kota, Rajasthan, India. It is known for research contribution in the topics: Photovoltaic system & PID controller. The organization has 716 authors who have published 1084 publications receiving 4530 citations. The organization is also known as: RTU.

Han–Carlson adder based high-speed Vedic multiplier for complex multiplication

Abstract: Critical role is played by multipliers in modern digital signal processing systems. The overall system is affected by multipliers in terms of speed and computational complexity. In this paper, a Han–Carlson adder (HCA) based high-speed Vedic multiplier is proposed. The proposed Vedic multiplier uses Urdhva–Tiryakbhyam sutra of Vedic multiplication. Han–Carlson adder is one of the parallel-prefix adders which provides high-speed to the proposed multiplier architecture. Proposed architecture of 64 × 64 bit Vedic multiplier is implemented using Xilinx ISE 14.2 navigator in VHDL. The implementation results of proposed architecture are compared with conventional Vedic multipliers with different adders which show that the conventional multipliers is having larger time delay as compared to proposed multiplier. Furthermore, complex multiplication architectures, using three and four 32 × 32 bit proposed Vedic multipliers are also implemented. The results of these complex multiplication architectures are also compared with conventional Booth multiplier and Array multiplier based architectures which show that the complex multiplication using proposed architecture provides improved delay, low hardware (LUTs) and low complexity.

Design and small signal stability enhancement of power system using interval type-2 fuzzy PSS

Abstract: In this paper the performance analysis of an interval type-2 fuzzy logic controller (IT2 FLC) as a power system stabilizer (PSS) is carried out. The input signals to the controller are considered as speed deviation and acceleration. The application of IT2 FLC as PSS (IT2 FPSS) is considered to improve small signal stability of power system. It is considered for three different benchmark systems such as single-machine infinite-bus (SMIB), two-area four-machine and IEEE ten-machine thirty nine-bus power system. The performance with IT2 FPSS is compared against the performance of the power system without PSS, with conventional PSS (CPSS) and with fuzzy PSS (FPSS). The application of IT2 FPSS is extended to two-area four-machine ten-bus and IEEE New England ten-machine thirty nine-bus power system and speed response comparison is carried out with FPSS. The superiority of performance with IT2 FPSS over type-1 FPSS is validated in terms of ITAE, IAE and ISE.

Graphene-based nanocomposites as sensing elements for the electrochemical detection of pesticides: a review

Abstract: Only about 3% of Earth’s water is freshwater out of which only 0.4% is accessible as surface water in the form of lakes, rivers and groundwater. When harmful substances (like organic matter, industrial wastes, pesticides, fertilizers) contaminate freshwater, it becomes a major problem as they may not damage one’s health immediately but can be harmful after long-term exposure. In this context, there is a need to develop sensitive and reliable sensors that are able for in situ measurements of such contaminants. Electrochemical sensors can in situ detect target analytes based on change in current due to redox reaction of an electroactive species with the specific surface at a certain potential. Nanotechnology offers the advantage for manipulating the size and morphology of specific surface at working electrode. Here in this review article, the work done in the last few years in the field of electrochemical detection of pesticides using graphene-based nanocomposites is discussed. This review paper presents summarized work about the methods and materials for developing electrochemical sensors. Sensing mechanism is discussed, and related data is also presented to provide an overview.

Banes and boons of perturb & observe, incremental conductance and modified regula falsi methods for sustainable PV energy generation

Abstract: Maximum power point tracking (MPPT) optimizes overall power generation in photovoltaic (PV) applications. The voltagepower characteristics of PV array operating under variable irradiance and temperature conditions exhibit numerous local maximum power points (MPP). This paper presents the optimization method of MPP tracking, based on the modified Regula Falsi method (MRFM). Results of this method are compared with the conventional perturb & observe (P&O) method and the incremental conductance (IC) method. The modified Regula Falsi method has better convergence, lower oscillation time, less power loss and enhanced output power than the other two methods. To obtain a stable voltage from a solar array, a DC-DC Cuk converter is used. It can step-up and step-down the voltage level according to load requirement. Results have been verified on the MATLAB platform in variable environmental conditions.