International Conference on Innovations in Electrical & Electronics Engineering

The recent decades have seen the increase in solar power demand for reliable and clean sources electricity. The generation of solar power is based on the sun rays intensity on the solar panel and the wavelength. The challenge in solar power plant to maximize the wavelength of the rays from the sun and minimize the temperature effect on the Panel. This paper analysis the solar panel based on different wavelength based Light intensity.
Keywords:efficiency, solar power, , tracking, sun rays, intensity, solar panel,

In this paper, Conventional Direct Torque Control (CDTC), torque and flux are controlled independently by selecting the optimum voltage space vector for entire switching period and the errors are monitored within the hysteresis band. For less torque and flux error, frequency of operation of pulse width modulation (PWM) inverter should be very high. The switching frequency always varies according to the width of hysteresis bands. CDTC has high dynamic performance, accurate speed response. The DTC based voltage source inverter fed induction motor drive is capable of offering four quadrants in the torque-speed plane of operation like, forward motoring, forward generating, reverse generating and reverse motoring. To validate the proposed algorithms numerical simulations has been carried out in Matlab/Simulink environment using Runge-Kutta solver. Variation in stator currents, speed, electromagnetic torque developed and stator flux during different operating conditions of the drive like starting, steady state, step change in external load and reference torque reversal are presented.

Key words:Direct torque control (DTC), Induction motor (IM), Inverter.

To generate green power from the designed equipment and to increase the percentage of utilization of green energy in the household purpose with most economical methods like using the non-renewable sources via. Solar energy and wind energy and effect of pitch angle on power production. It is becoming cheaper to make electricity from solar energy and in many situations it is now competitive with energy from coal or oil. In contrast, renewable energy resources — such as wind energy — are constantly replenished and sustainable .The total equipment consist of two way power generation by using renewable energy resources (solar and wind).since they are adequately available at the residential areas in most of the parts of the world. In our country the monsoon winds which are generally carried out by throughout the year possess the speed of around 2kmph to 3kmph which is more than enough to run the designed turbine.

KEYWORDS : alternator setup, energy storage, Gear ratio, VAWT

Multilevel inverters have been widely accepted for high-power high-voltage applications. Their performance is highly superior to that of conventional two-level inverters due to reduced harmonic distortion, lower electromagnetic interference, and higher dc link voltages. However, it has some disadvantages such as increased number of components, complex pulse width modulation control method, and voltage-balancing problem. In this paper, a new topology with a reversing-voltage component is proposed to improve the multilevel performance by compensating the disadvantages mentioned. This topology requires fewer components compared to existing inverters (particularly in higher levels) and requires fewer carrier signals and gate drives. Therefore, the overall cost and complexity are greatly reduced particularly for higher output voltage levels. A new inverter topology has been proposed which has superior features over conventional topologies in terms of the required power switches and isolated dc supplies, control requirements, cost, and reliability. In the mentioned topology, the switching operation is separated into high- and low-frequency parts.

KEYWORDS : Multilevel inverter, Reversing voltage topology, PD SPWM, Simulink, power electronics

Recently, there is a growing interest on the concept of six phase transmission as an alternative to the voltage up gradation of a line, to increase the power transfer capability within the existing rights of way. This paper mainly deals with the transient stability analysis of a 3-phase double circuit line in comparison with that of equivalent 6-phase transmission line. A smart grid is a grid that is capable of delivering electricity from suppliers to consumers via a two-way digital technology, effectively controlling the consumers energy consumption by reducing the cost of generation and transmission and hence to improve the system performance, efficiency and reliability. A framework for cohesive integration of smart grid and six phase transmission technologies facilitates convergence of highly needed standards and implementation of necessary analytical capabilities. This paper critically reviews the reliability impacts of smart grid resources and transient stability of six phase transmission. We observe that an ideal mix of these resources leads to a better stability that eventually accentuates reliability challenges further.

KEYWORDS : Power Transfer Capability, transient stability, three-phase Double circuit AC transmission line, six-phase transmission line, Smart Grid

This paper presents the design and analysis of voltage source inverters (VSI) using three different pulse width modulation techniques i.e, sinusoidal pulse width modulation (SPWM), third harmonic injection pulse width modulation (THIPWM) and space vector pulse width modulation (SVPWM). In AC the quality of the sinusoidal waveform is more important than the quantity. In order to achieve that , we need to reduce the harmonic content in the output. For this purpose various pulse width modulation techniques are used. The PWM methods are simulated for various loads and the results are analyzed using FFT analysis for observing the total harmonic distortion (THD). The simulations are performed in MATLAB/SIMULINK environment.

KEYWORDS : Voltage source inverter (VSI), multilevel inverter, SPWM, THIPWM, SVPWM and THD

Compared with neutral-point-clamped (NPC) inverters, active NPC (ANPC) inverters enable a significantly improved output power and performance for high-power electrical drives. This paper analyzes the operation of three-level (3L) ANPC inverters under device failure conditions, and proposes the fault-tolerant strategies to enable continuous operating of the inverters and drive systems under single device open and short failure conditions. Therefore, the reliability and robustness of the electrical drives are greatly improved. Moreover, the proposed solution adds no additional components to standard 3L-ANPC inverters; thus, the cost for robust operation of drives is lower. Simulation results are provided for verification. The results show that 3L-ANPC inverters have higher reliability than 3L-NPC inverters when a de-rating is allowed for the drive system under fault-tolerant operation.

KEYWORDS : Active NPC (ANPC), multilevel inverters, fault tolerant, reliability

In this paper, a simplified space vector pulse width modulation (SVPWM) method has been developed for three-phase three-level voltage source inverter fed to direct torque controlled (DTC) induction motor drive. The space vector diagram of three-level inverter is simplified into two-level inverter. So the selection of switching sequences is done as conventional two-level SVPWM method. Where in conventional direct torque control (CDTC), the stator flux and torque are directly controlled by the selection of optimal switching modes. The selection is made to restrict the flux and torque errors in corresponding hysteresis bands. In spite of its fast torque response, it has more flux, torque and current ripples in steady state. To overcome the ripples in steady state, a space vector based pulse width modulation (SVPWM) methodology is proposed in this paper. The proposed SVPWM method reduces the computational burden and reduces the total harmonic distortion compared with 2-level one and the conventional one also. To strengthen the voice simulation is carried out and the corresponding results are presented.

KEYWORDS : DTC,DSVM,FOC,SVPWM.

In recent years, multilevel inverters have gained much attention in the application areas of medium voltage and high power owing to their various advantages such as lower common mode voltage, lower voltage stress on power switches, lower dv/dt ratio to supply lower harmonic contents in output voltage and current. Comparing two-level inverter topologies at the same power ratings, MLIs also have the advantages that the harmonic components of line-to-line voltages fed to load are reduced owing to its switching frequencies. The most common MLI topologies classified into three types are diode clamped MLI (DC-MLI), flying capacitor MLI (FC-MLI), and cascaded H-Bridge MLI (CHB-MLI). The hybrid and asymmetric hybrid inverter topologies have been developed according to the combination of existing MLI topologies or applying different DC bus levels respectively. This paper proposes a new Multilevel Inverter for Induction Motor Drive. The Inverter presented gives a seven level output voltage. This inverter uses very less number of switches when compared with the other type of multi inventers like diode clamped, flying capacitor, and cascaded inventers. This topology requires very less number of carrier signals and gate drivers, especially when used for higher levels. The above discussed inverter is fed to a induction motor drive and the performance of the motor is analyzed for nine level and eleven levels.

KEYWORDS :MLI (multilevel inverter), Reversing Voltage Multilevel topology, SPWM technology.

In this paper ,two types of controls algorithms are proposed to regulate the DC bus voltage of a High three phase shunt active power filter (HSAPF), proportional integral (PI) and fuzzy logic controllers. Our objective here is to maintain the DC bus voltage of the inverter constant to bring down the total harmonic distortion (THD) of source current sufficiently below 5% at the point of common-coupling with variation of loads, in order to satisfy the IEEE 519-1992 Standard recommendations on harmonic limits. The synchronous reference frame phase locked loop (SRF PLL) algorithm Id, Iq is used to extract the harmonic reference currents. The hysteresis band method is employed to derive the switching signals of the High shunt active power filter. The comparison made between the two types of DC bus voltage controllers shows that these control strategies gives the best results. A series of simulation by MATLAB/Simulink are presented and discussed to show the performance and the effectiveness of these control strategies.

KEYWORDS: High three phase shunt active power filter (HSAPF), Total harmonic distortion (THD), Fuzzy logic controller,.

This paper deals with the result of the work done in determining the Hysteresis and Eddy current losses of a magnetic material using Epstein frame. This paper deals with all about construction of Epstein frame using a particular magnetic material and tracing its Hysteresis loop in a CRO, (Cathode-Ray Oscilloscope) with the help of values obtained from the CRO the losses are calculated .

KEYWORDS : Hysteresis losses, Eddy current losses, Epstein frame, Hysteresis loop

As we know that electrical energy plays a major role in day to day human life. It is not possible to imagine human life without electrical energy. This is because of the storage problem i.e. the electrical energy cannot be strong but is generated from natural sources and delivered as demand arises. An electrical engineer always tries to generate, transmit, and distribute the electrical energy at affordable cost while satisfying the constraints. Economic Dispatch is the process of allocation of optimal load to each committed generators while satisfying the equality and inequality constraints. The objective is to minimize the fuel cost by maintaining the generation power in limits and to reduce the computational time. The Economic Dispatch(ED) has been frequently solved by using classical optimization methods. In this proposed method the ED problem is formulated and solved by Particle Swarm Optimization technique. Three case studies are carried out on 6-unit and 15-unit systems. The solution is developed using MATLAB. Cost Generation is taken as an objective function and it is compared with the results of Genetic Algorithm (GA).

KEYWORDS : Cost Function, Economic Dispatch, Power Loss, Objective function, Particle Swarm Optimization, Constraints..

This work deals with Power quality improvement using multiple STATCOMs and also power quality improvement of thirty bus system using D-STATCOM. The thirty bus system is modeled using the elements of SIMULINK. This model is used for conducting the simulation studies. The simulation results of the thirty bus system with and without D-STATCOM are presented. Power Quality improvement is observed by adding D-STATCOM in the existing network.

KEYWORDS : Distribution Static Synchronous Compensator (D-STATCOM), Power Quality (PQ), FACTS, Voltage source converter (VSC), Current source converter -(CSC).