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In this work, a new topology is proposed to integrate large solar photovoltaic installations to high-voltage DC grid, which is efficient, economical and flexible in its operation. The proposed system consists of a PV array-fed DC–DC boost converter, grid-connected DC–DC boost converter circuits and hybrid controller. The hybrid controller proposed here consists of the random search method (RSM)-based...
The increased concerns for environmental protection and energy conservation had led to accelerated growth in PV technologies, however large scale integration of this to an AC grid will have a serious impact on power system operation. Development of DC power system is chosen as a solution to overcome many of those impacts. Photovoltaic arrays used here will generate an output at a low voltage level,...
Placing dental implants in humans is a task that requires a large amount of dexterity, effort and precautionary measures on behalf of the dentist. One of the most important sub-task of this procedure is drilling a hole in the jaw of patient. Increasing advances in the field of robotics have made it possible to build robotic arms that can attain the same degree of precision as that of dentist for this...
This paper presents a comparative analysis of the Load Frequency Control (LFC) strategies for a stand-alone PV-Wind hybrid system employed for voltage source inverter, with the PLL based and droop characteristics based control strategy. In the LFC strategies a discrete Phase lock Loop (PLL) based control technique is utilized to maintain the output voltage and frequency constant irrespective of change...
The importance of Microgrid concept is increasing extensively and more number of microgrids will be installed at consumer premises in the coming future. The penetration of distributed generation (DG) units consisting different loads makes microgrids suffer from power quality and power control issues. Some of them are voltage stability, swells and sags, and power factor improvement which require reactive...
The non-conventional energy sources like photovoltaic cells and fuel cells will be at a low voltage level, this must be stepped up considerably for DC grid integration, for which we need a high voltage gain DC-DC boost converters. In this paper a multilevel boost converter (MLBC) topology is presented which consists of a simple boost converter and switched capacitor technique to provide high voltage...
Solar energy source is one of the most promising energy sources in nature, but the output power generated by photovoltaic (PV) devices which converts sun's light energy to electrical energy, is a nonlinear function of the external environment. To improve the performance of PV devices in such cases, design of maximum power point tracking (MPPT) function is more important. In addition to it, in DC grid...
Microgrids (MG) are turning out to be progressively appealing to consumers and an incredible number of them will be introduced at their premises in the near future as they allow utilization of freely available renewable energy sources. Because of high penetration of distributed generation units with distinctive sorts of loads, microgrids can be subjected to power quality and control issues. Some of...
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...
This paper mainly focuses on integration of distributed generation to a DC grid. The performance of grid connected solar PV system is evaluated using hybrid control of DC-DC boost converter. The hybrid controller proposed here includes MPPT controller and fuzzy logic controller. MPPT controller using incremental conductance technique is used to track the maximum power from the PV source, whereas fuzzy...
Microgrids (MG) are becoming increasingly attractive to consumers and a great number of them will be installed at consumer's sites in the future. Due to high penetration of distributed generation (DG) units with different types of loads, microgrids can cause power quality and power control issues. Some of them are voltage stability, swells and sags, and power factor improvement which require reactive...
Mitigation of power system oscillations, within the frequency range of 0.1 to 2 Hz, is the problem of concern in the power industry as these oscillations, when exhibiting poor damping; affect the transmission line power transfer capability and power system stability. These low frequency oscillations greatly restrict power system operations and, in some cases, can also lead to widespread system disturbances...
Microgrids (MG) are becoming increasingly attractive to consumers and a great number of them will be installed at consumer's sites in the future. Due to high penetration of distributed generation (DG) units with different types of loads, microgrids can cause power quality and power control issues. Some of them are voltage stability, swells and sags, and power factor improvement which require reactive...
Microgrids are becoming increasingly attractive to consumers as it allows utilization of freely available renewable energy sources. They are usually installed at consumer's sites i.e the distribution end. Due to high penetration of distributed generation units with different types of loads, microgrids can cause power quality and power control issues. Some of them are voltage swells and sags, and low...
In order to investigate small wind turbines, a comprehensive knowledge of mechanical and electrical parameters is required. Permanent Magnet Synchronous Generator (PMSG) is one of the kinds which are widely used for variable speed and direct driven wind power generating. In order to predict the amount of power that can be extracted by the wind turbine in a concerned area the knowledge of wind speed...
The distribution system contains various types of loads. These loads can be broadly classified as sensitive loads and non-sensitive loads. The sensitive loads are easily affected with power quality problems. Hence, power quality improvement is major concern in the distributed system. The power quality problems that are faced in the distribution side are voltage sag/swell, harmonics, flickering, distortions...
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,...
The renewable energy sources such as Solar energy and Wind energy are complementary by nature. Utilizing these natural resources to produce power will reduce the power demand on the conventional power generation sector. One of the applications of Solar-Wind hybrid power system (SWHPS) is to reduce the amount of power consumed from the conventional power generation to charge the storage reserves present...
Power Quality improvement at the distribution level is a demanding requirement these days. The major power quality problems are voltage sag and harmonics. To mitigate the voltage sag, Dynamic Voltage Restorer (DVR) is one of the solutions which involves real power injection into the system which entirely depends on the energy storage capacity of the DVR. This limits the capability of DVR for longer...
The increase in concern for carbon emission and reduction in natural resources for conventional power generation, the renewable energy based generation such as Wind, Photovoltaic (PV), and Fuel cell has gained importance. Out of which the PV based generation has gained significance due to availability of abundant sunlight. As the Solar power conversion is a low efficient conversion process, accurate...
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