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In this paper, the grid connected solar photovoltaic (SPV) power plant of L&T construction, phagi, jaipur, Rajasthan, India is presented and its performance is evaluated. This power plant has a capacity of 1 MW and has been in operation since March 2012. In this paper various performance parameters such as Performance ratio, reference yield, array yield, final yield of array are calculated using...
Monitoring utility-scale solar arrays was shown to minimize cost of maintenance and help optimize the performance of the array under various conditions. In this paper, we describe the design of an 18 kW experimental facility that consists of 104 panels fitted with smart monitoring devices. Each of these devices embeds sensors, wireless transceivers, and relays that enable continuous monitoring, fault...
Among all control methods for induction motor drives (IMD), Direct Torque Control (DTC) seems to be particularly interesting being independent of machine rotor parameters. In spite of its simplicity, DTC allows good torque control in both steady and transient state. DTC drives utilizing hysteresis comparators suffer from high torque ripple and variable switching frequency. Major drawback of Classical...
An enthrallment for Science & Technology and the ever-growing world of technology lead to many Technologies. Due to lack of fossil fuels there rises the demand for generation which be contingent on the Renewable energy sources. In this paper focuses on modeling of control circuit i.e PI controller gain values are optimized by the Bats echolocation algorithm. In our work Lithium-ion Battery energy...
This paper proposes a three phase seventeen-level inverter for grid-connected photovoltaic systems, with a novel pulse width-modulated (PWM) control scheme. The proposed topology constitutes the conventional three-phase bridge with three bidirectional switches. A multilevel dc link using PV cells and cascaded half-bridge is connected in such a way that the proposed inverter outputs the required output...
The sun and wind based generation are well-thoroughly considered to be alternate source of green power generation which can mitigate the power demand issues. As sun powered and wind power advancements are entrenched and the infiltration of these Renewable Energy Sources (RES) into to network is expanding dynamically, testing errand is to keep up the voltage and frequency of the power generated from...
Insulation degradation in the stator winding of electrical motors fed by inverter drives has been concerned about researchers over the last two decades for obtaining adjustable speeds. The Power Electronic Converters produces a PWM waveform with fast rising pulses due to high switching frequency of IGBT's, cause's premature failure of motor winding insulation. To simulate the breakdown of motor insulation,...
In this paper, a fault-tolerant single-phase five-level inverter configuration is proposed for photovoltaic (PV) generation systems. Conventional two-level inverters are popularly used in PV applications, but these inverters provide the output voltage with considerable harmonic content. One of the efficient ways to improve the power quality of PV generation systems is to replace a two-level inverter...
Multilevel inverters are of special importance in high power and medium power applications. Reduced distortion, better output power quality, minimum switching losses, reduced switching stress make multilevel architecture preferred. This paper demonstrates a new topology of a 9-level and 15-level inverters which requires less number of power switches and as well as DC voltage sources than that of existing...
A fault tolerant single phase five level inverter is proposed in this paper for islanded photovoltaic (PV) generation system. The topology has the capability of maintaining same output voltage magnitude in case of switch open circuit fault and/or source open or short circuit fault with slightly reduced number of voltage levels. This helps in supplying uninterruptable power to essential loads even...
Power sharing between angle-droop controlled inverter-based sources largely depends on the line impedances and choice of droop coefficients. Simple power correction methods such as set-point correction and droop coefficient modification work satisfactorily for specific network topologies and require only limited amount of communication. However, their performance can be inadequate for microgrids with...
The dynamic resonant magnetic perturbation (DRMP) coils have been designed to study the feedback control of tearing mode (TM) instability in J-TEXT tokamak with rotating resonant magnetic perturbation. The AC power supply system energizing coils should have the ability of controlled current frequency in the range of 1 kHz to 5 kHz and amplitude of 5 kA peak value at 5 kHz. In further study, TM will...
A multi-level inverter configuration for 4n pole induction motor drive is presented in this paper. This topology is developed using three two-level inverters and two isolated dc sources. Among these three two-level inverters one inverter is switched at fundamental frequency and remaining two inverters are switched at higher frequency. Two isolated dc sources with equal magnitude are used in this topology...
Power system is broadly divided into three stages, generation, transmission and distribution. There are several challenges in each stage which are needed to be addressed. This paper concentrates on the challenges in distributed systems called power quality. Power quality improvement is a major concern in the distributed system. There are several power quality problems like voltage sag, harmonics,...
In this paper, a Z-source fed 3-phase, 3-level diode clamped inverter topology implementing modified reference and carrier based modulation techniques have been analyzed for different shoot through states of operation. Performance of the system based on respective carrier and reference frame of control has been thoroughly evaluated and simulation results pertaining to magnitudes of Total Harmonic...
For a residential PV installed application complete utilization of battery banks is key to reduce grid dependency and improved reliability. To achieve this objective it's important to keep battery banks at nearly equal state of charges. This paper proposes a technique to keep battery banks within limit by switching isolated panels. Selection of isolated panels is done by considering irregularity of...
The well known advantages from PV based power generation (PVPG) are pollution free, short-term installation and long life operation. However, disadvantages are also associated, for e.g. dependency of generated power on weather conditions, and researchers are putting efforts to overcome them by application of power electronic based devices and techniques like maximum power point (MPPT) in the systems...
The dual-inverter fed Open-End Winding Induction Motor drive offers interesting possibilities for multilevel inversion. It needs two isolated power supplies to feed individual inverters to avoid the flow of zero-sequence current. Three Space Vector PWM schemes have been reported in the earlier literature, which facilitate the operation of the dual-inverter drive with a single power supply. This paper...
In droop-controlled inverter-based microgrids, component mismatches and parameter drifts may have a significant effect on system stability. Analyzing this practical and important problem, it is shown that droop control is sensitive to such drifts and certain conditions have to be satisfied to maintain stability. Furthermore, these mismatches lead to a deviation in power sharing between the droop-controlled...
This paper proposes Interline Dynamic Voltage Restorer (IDVR) to mitigate voltage sag, while its DC link energy is restored by phase shifting transformers. The Dynamic Voltage Restorer (DVR) was proposed as a solution to Voltage Sag compensation involving considerable amount of real power injection into the system which entirely depends on the energy storage capacity of DVR thus limiting its capabilities...
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