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.

Multilevel Inverter: An Approach with Reduced Number of Semiconductor Devices

Abstract: In this time, Multilevel Inverter (MLI) innovations turn into an unimaginably primary decision in high power medium voltage energy control range. Despite the fact that multilevel inverter has various advantages but since of utilizing more number of semiconductor switches, it has disadvantages in the vein of high level, extensive size and high cost. To defeat this issue another multilevel inverter is proposed with four DC sources. This inverter can produce both odd and even levels. The proposed topology is appropriate for high power applications and for symmetric structure. The proposed symmetric inverter results in decrease of power switches, power diode and gate driver circuits furthermore it might minimize the installation area and cost. This symmetric multilevel inverter produces nine levels and results are approved through the harmonic spectrum of the FFT window by utilizing MATLAB Simulink.

Active Power Filter for Harmonic Mitigation of Power Quality Issues in Grid Integrated Photovoltaic Generation System

Abstract: Single phase supply scheme tied with Photovoltaic arrangement (PV) employed on perturbed & observed (P&O) maximum energy point tracking technique with shunt active power filter allied to a rectifier feed R-L nonlinear load. The traditional Perturbed & Observed technique maximum energy point tracking topology is applied to attained maximum output power from Photovoltaic array(PVA), Proportional Integral conventional controller with phase detector (PD) phase locked loop (PLL) synchronization are executed to produce reference current. It provide at control unit of pulse width modulation topology( PWM) is utilized in inverter to get steady output voltage. Self supported DC bus PWM converter is regulated from PV array. In proposed architecture is minimized total harmonic pollution existing in supply current owing to power electronic load (PEL). Total current harmonic pollution (THDi) is compensated using dynamic filter shunt active power filter (SAPF) and power factor obtain better later than compensation. Hence, reactive power (KVAR) is delivered through system decrease and active power (KW) enhance. The suggested scheme has been implemented by way of MATLAB/SIMULINK 2015(a) environment.

Analysis and Integration of Nine Level Cascaded H-Bridge Multilevel Inverter Configuration in a Photovoltaic System

Abstract: Power electronics converters are gaining importance due to the reliable performance of grid-connected solar system or standalone solar system. In this paper nine levels cascaded H-bridge Multi-level inverter (CHB-MLI) is analyzed. The effectiveness of this multilevel inverter is investigated by replacing the input dc source in cascaded inverter bridge with separate PV array and boost converters. This PV fed nine levels CHB is analyzed in two ways: (i) with equal magnitude of input voltage source to inverter and (ii) with unequal magnitude of input voltage source. Total harmonic distortion (THD) analysis for both cases has been carried out. Different multicarrier PWM strategies are also discussed. Further, the improvement in power quality by using passive filters at the output end of MLI is shown. Results are verified in MATLAB/SIMULINK environment by performing simulation.

Design and simulation of dependence of manufacturing technology and tilt orientation for 100kWp grid tied solar PV system at Jaipur

Abstract: Yield and loss prediction plays an important role in the planning and operation of solar PV systems. The performance of a solar PV system depends on the location, system design, field of view, and the orientation of the solar panels in a given system. Some design and simulation tools are designed by professionals to connect to efficient planning and grid operations as well as stand-alone solar photovoltaic systems. PV SYST is recognized globally as being too fuzzy and assessing the performance of solar PV systems. In this paper, we design model of a 100 kW solar PV system in Jaipur and simulate a model developed using PV SYST. The type of module varies with polysilicon to monocrystalline and thin film-based solar photovoltaic modules. The observations and results of the proposed work are important to understand the effect of module type and tilt angle optimization on the performance parameters of the system.

DSP-based fuzzy load controller for single phase self-excited induction generator

Abstract: This paper presents the design and implementation of a fuzzy logic-based load controller to regulate the voltage and frequency of single phase self-excited induction generator (SEIG), suitable for standalone operation. The SEIG can be used to generate constant voltage and frequency if the load is maintained constant at its terminals. Moreover, under such operation, SEIG requires constant capacitance for excitation resulting in a fixed-point operation. For this purpose, a suitable control scheme is to be developed such that the load on the SEIG remains constant despite the change in the consumer load. A DSP-based fuzzy load controller has been developed based on equal time ratio control (ETRC) AC chopper controllable load which gives non-linear control with fast response and injects minimum harmonics in the system. The transient behaviour of DSP-based SEIG-fuzzy load controller system at different operating conditions such as application and removal of static (resistive and reactive) load is investigated.