Wyniki wyszukiwania dla: Sumant G. Kadwane
artykuł
Journal of Process Control > 2018 > 62 > C > 55-65
A Belt Weigh Feeder (BWF) is a flat belt conveyor designed for feeding bulk material into a chemical process in a controlled fashion for better process control. The dynamic weight of bulk material is measured with a belt weigh bridge and the belt speed is controlled to compensate for any variation in the weight so that the mass feed rate is maintained as per the set feed rate. The problem of belt...
artykuł
Microsystem Technologies > 2018 > 24 > 8 > 3409-3415
This paper presents, ant colony optimization based hybrid algorithm for selective harmonic elimination in single phase seven level multilevel inverter with reduced switches. For high power and high voltage applications, multilevel structure with selective harmonic elimination (SHE) modulation scheme is used. The output voltage of multilevel inverter contains fundamental component along with harmonics...
artykuł
Energy Procedia > 2017 > 117 > C > 643-650
The grid connected inverters are increasingly used nowadays in distributed generation and smart grid. But the main challenge in grid connected systems is their compatibility with grid utility and also to maintain the harmonic contents of output current. To overcome these challenges, different current control techniques are used so far. This paper presents a multilevel inverter for single phase grid...
artykuł
Canadian Journal of Electrical and Computer Engineering > 2017 > 40 > 3 > 237 - 245
Integration of solar photovoltaic (PV) panels with existing utilities requires effectively controlled converters. While developing and testing such converters, it is difficult to test them with actually installed PV panels owing to unavailability of practical onsite conditions for all the time. For such cases, PV simulators are preferred, which are required to exhibit PV system behavior under working...
artykuł
IEEE Access > 2017 > 5 > 11298 - 11306
Total harmonic distortion, produced with the existing PWM techniques for a Z-source inverter topology, is higher due to the unsymmetrical shoot-through, if separate controls of ac and dc sides are required. This paper proposes the concept of symmetrical shoot-through-based modulation and compares the performance with the case of the popular simple boost control. The proposed modulation method achieves...
artykuł
IEEE Access > 2017 > 5 > 10232 - 10240
Quasi-Z-source inverters (qZSIs) are nowadays increasingly used owing to advantages such as single-stage operation, lower component rating, and continuous input current and common dc rail. These benefits lead to investigate this converter for grid-connected applications. This paper presents a grid-connected qZSI with both ac and dc side control. Sliding mode control (SMC)-based controller for capacitor...
rozdział
Micro grid is a latest concept for upcoming energy distribution system that enables, renewable energy integration. It generally combination of multiple distributed generations (DG's), that are usually connected to the grid through power inverters. During the islanding operation (autonomous mode) of grid, important task are to share the load demand among multiple parallel connected inverters proportionately,...
rozdział
This paper presents the dynamic performance analysis of grid connected Z-source inverter (ZSI) based distributed generation (DG). ZSI provides a single stage buck boost conversion which reduces the switching losses and becomes an economical option for DG systems. The standards set by the utility is met by the ZSI even during variable input conditions by regulation of shoot through duty ratio. The...
rozdział
Due to increasing importance of distributed generation and smart grid, solar PV systems are gaining more and more importance. However for the efficient design of the solar PV systems, solar emulator is necessary which mimics the actual PV characteristics. In this paper, a solar PV emulator with quasi sliding mode controller is presented which can simulate the real time PV characteristics under varying...
rozdział
Requirements for smart grid are higher efficiency using power electronics and ensuring reliability of components. Refrigeration system is readily used in industries and is now becoming a commonly used household application. Now a day, voltage source inverter based BLDC drive is emerging as a more efficient controller option for refrigeration systems compared to conventional induction motors. Importance...
rozdział
DC-DC switched mode converters are nonlinear and time variant systems, and do not lend themselves in the application of linear control theory. Control strategies for these controllers are now mature but still attempts are being made towards the improvement of performance in event of disturbances. The state space average method is readily used for modeling and design of these controllers. In this paper,...
artykuł
IET Power Electronics > 2016 > 9 > 11 > 2174 - 2185
This study aims to propose a control which is a combination of model predictive control (MPC) and hysteresis current control (HCC) referred as hysteresis-based predictive control. Similar to MPC, the system model is incorporated and used to determine predicted compensator currents without considering cost function. Further, these currents are compared with the reference currents extracted using instantaneous...
rozdział
With the advent of increase in use of distributed energy systems, particularly for standalone grid connections, it is necessary that the effective control strategy has to be designed to improve the dynamic response. The Z-source inverter provides advantages over conventional inverters in the form of its buck-boost capability. Owing to its single stage power conversion, the Z-source inverter becomes...
rozdział
For medium and high voltage applications, Multilevel inverters have been widely used as a important devices. The advantages of multilevel inverters include low electromagnetic interference (EMI) outputs, low power dissipation, low harmonic etc. The most common multilevel inverter topology is cascaded H-bridge topology constituted by IGBT semiconductors. The most common switching technology used is...
rozdział
Power Electronics is essential in almost most of the modern renewable energy generation in order to enhance the efficiency of the generation. Converters are used as an interface between load and PV panels particularly for Maximum Power Point Tracking (MPPT). This paper introduces the reliability model of solar PV generation system not only on the physical characteristics but on the simulated operating...
rozdział
Now a day's distributed generations (DG) systems are generally integrated with single phase grid at small scale. The power delivered from such DG sources depends on factors like energy availability and load demand. To achieve the reliability of the system a good quality of power must be transmitted to the grid with less harmonic and unbalance. Hence proper control action is to be carried out to control...
rozdział
Now a day due to the requirement of renewable energy sources distributed generations (DG) are increasingly used. In such DG grid connection is required through DC-AC inverters. This paper presents a multilevel inverter for single phase grid connected system. Multilevel inverter performance is compared investigated to the conventional two level inverters due to their reduced harmonic distortion. The...
rozdział
This paper presents the effect of harmonic analysis on Z source inverter. The Z source inverters are extensively used in PV based generations. The Z source inverter (or converter) overcomes the limitations of traditional inverters. It have unique shoot-through operation feature which allows short circuiting the inverter bridge, hence omits switching device dead time insertion so that output performance...
rozdział
This paper presents the sinusoidal pulse width modulation technique based switching strategy for three level H-bridge inverter for single phase shunt active power filter applications. The H-bridge voltage source inverters are extensively used in active filtering inverter products. Sinusoidal Pulse Width Modulation (SPWM) technique has fixed switching frequency and provides advantage over others. Power...
rozdział
This paper explains Z source inverter (ZSI) having unique impedance network with its operation, control and simulation. Traditional current source and voltage source inverter (VSI and CSI) have various conceptual and theoretical barriers with some limitations. All these are overcome by ZSI. It provides a novel power conversion concept. Z source concept can be applied to all ac-ac, dc-dc, ac-dc, dc-ac...
