Anupama Singh

Bio: Anupama Singh is an academic researcher from Maharashtra Institute of Technology. The author has contributed to research in topics: Turbine & Wind power. The author has an hindex of 2, co-authored 23 publications receiving 13 citations.

Ice extraction from wind turbine using flow of hot air through blade

Abstract: In this paper high the ice accumulated on the wind turbine blade is removed by passing hot air through the blade. The hollow tubes are embedded in the wind turbine blades. The hollow tubes may be circular on cross section or of any suitable shape. The air is heated by an electrical heating or by gas geyser. First the air is compressed with help of a compressor. Then that air is passed through the electric heater or gas heater. The hot air is then passed through the wind turbine blade. When the hot air is passed through the wind turbine blade, the ice melts and falls down. Hot air is passed through the wind turbine blade after frequent intervals of time when the environmental conditions are favorable for icing. The process of deicing is fast.

Impact of vertical wind shear on wind turbine performance

Abstract: This is paper presents significance of vertical wind shear. Voltage flicker that may be initiated in the output of the horizontal axis upwind wind turbine located at any given site for a given tower height and blade length. Vertical wind shear is one of the important parameters which instigate voltage flicker in wind turbine output voltage. In this paper diverse origins of flicker, places where wind shear occurs, computation of wind shear, general impacts of wind shear, impact of wind shear on wind turbine output is discussed.

Tree mounted wind turbine

Abstract: In this invention the wind turbine is fixed to the tree stem. With this mechanism, the need of foundation of the wind turbine is eliminated. The invention is related to small wind turbine. The turbine location is above the top of the tree to get sufficient wind speed. The pole may be attached to the tree with the help of springs to facilitate the growth of the tree. The pole may be attached to a tree stem at four to five different locations. The energy generated may be stored in a battery kept in a house near by the tree. This may be used for temporary electrical supply for research work in the industry, forest, rural area etc.

Feasibility of energy storage systems in different applications for sustainable energy

Abstract: Due to increased population, lot of emissions and pollutions are taking places in power sector, telecommunication sector, automobile sector etc. Hence there is need to reduce Green-house emission and other pollutions in various sectors by reducing/removing our dependency on fossil fuels. Renewable energy sources is gaining lot of attraction in power sector. The power networks faces lot of challenges in transmission and distribution to meet daily demands. In order to meet these challenges energy storage system plays very important role. Energy storage system is playing very important role in automobile industry & telecommunications green technology also to reduce pollution and green-house effect. Lead acid battery is most widely used in India due to its well-known chemistry, infrastructure low price and efficiency. The real disadvantage in lead acid battery is that it easily sulfates because of improper charging and discharging. This sulfation is more dominant in stationary applications. This paper basically focuses on various types of energy storage systems, their viability for particular applications, cost and life. Paper also focuses on the various techniques used to reduce sulfation in lead acid battery application and improving its life by reducing sulfation by artificial intelligence.

Sixth order model of wind turbine voltage flicker considering vertical wind shear

Abstract: Diverse models of voltage flicker are established by researchers. Each model has its own disadvantage. In this paper analysis of various models is done. The models consist of various wind turbine parameters like wind turbine tower height, surface roughness of the region, building height if the turbine is mounted on a building or hill height and slope of the hill on which the turbine is mounted. Sixth order model is most appropriate for wind turbine output voltage flicker.

Planning-Operation Co-Optimization Model of Active Distribution Network With Energy Storage Considering the Lifetime of Batteries

Abstract: In this paper, a multi-stage planning-operation co-optimization model of an active distribution network (ADN) integrated with energy storage systems (ESSs) is proposed, in which the lifetime of batteries is also considered. By adopting piecewise linearized battery lifetime model and approximate power balance constraints based on Kirchhoff’s Current Law and Kirchhoff’s Voltage Law, the problem is reconstructed as a mixed integer linear programming model. This model considers the bi-directional power flows in the ADN, multi-stage planning logical constraints, and the replacement/addition of feeders/ESS. In addition, the cost of construction, operation, power trading, ESS lifetime loss, and lost load are included in the objective function. Moreover, Benders decomposition is utilized to improve the convergence speed of the model, which becomes difficult to solve due to the complex battery lifetime evaluation. Case studies based on a fictitious 18-node ADN demonstrate the effectiveness of the proposed method, which produces economic planning result considering the battery lifetime for an ADN with ESS.

Author Correction: Smart low interfacial toughness coatings for on-demand de-icing without melting

Abstract: Abstract Ice accretion causes problems in vital industries and has been addressed over the past decades with either passive or active de-icing systems. This work presents a smart, hybrid (passive and active) de-icing system through the combination of a low interfacial toughness coating, printed circuit board heaters, and an ice-detecting microwave sensor. The coating’s interfacial toughness with ice is found to be temperature dependent and can be modulated using the embedded heaters. Accordingly, de-icing is realized without melting the interface. The synergistic combination of the low interfacial toughness coating and periodic heaters results in a greater de-icing power density than a full-coverage heater system. The hybrid de-icing system also shows durability towards repeated icing/de-icing, mechanical abrasion, outdoor exposure, and chemical contamination. A non-contact planar microwave resonator sensor is additionally designed and implemented to precisely detect the presence or absence of water or ice on the surface while operating beneath the coating, further enhancing the system’s energy efficiency. Scalability of the smart coating is demonstrated using large (up to 1 m) iced interfaces. Overall, the smart hybrid system designed here offers a paradigm shift in de-icing that can efficiently render a surface ice-free without the need for energetically expensive interface melting.

Numerical Study of Lightning Protection of Wind Turbine Blade with De-Icing Electrical Heating System

Abstract: In order to solve the problem of icing on the surface of wind turbine blade, a heating system that includes a carbon fiber net (CFN) and power cables is proposed recently. When lightning strikes at the blade with a de-icing heating system, the blade and its heating system are more easily damaged due to the overvoltage between the lightning protection system (LPS) of the blade and the heating system. In this paper, the models of a wind turbine blade with the de-icing heating system are established by Alternative Transients Program/Electromagnetic Transients Program (ATP–EMTP) and the accuracy of models is verified through an experiment. With these models, the influence of lightning current, surge protective devices (SPDs) and earthing resistance of wind turbine are analyzed by calculating the voltage between the down-conductor of the LPS and the heating system. The results show that the voltage is positively correlated with lightning current amplitude and negatively correlated with the front time of lightning current. SPDs are quite useful to reduce the voltage, and an optimal installation scheme of SPDs is obtained by simulation. It is noted that voltage decreases slightly with the increasing earthing resistance with the optimal installation scheme of SPDs.