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This paper discusses about usage of novel control strategy to extract maximum power in case of solar energy conversion system for renewable energy system applications with the power electronic technology based novel 3 level neutral point clamped inverter.Photovoltaic is one of the important renewable energy sources. Compared to other renewal energy sources photovoltaic energy is clean and abundantly available. Solar power is considered a very promising source for electric power generation. It is generally seen that the renewable energy system is highly stochastic in nature and does not guarantee continuous power throughout the period. The solar based renewable energy resource has to be coupled with the existing conventional gird which might overcome the stochastic behavior of the non conventional resources. To meet the demand of the various types of customers, the proposed combination or generation mix is highly desirable and ray of hope for future generation. The efficient usage of solar based power generation is certainly possible when interfaced with the existing gird and meet the load requirement of diversified customers who are dependent on electric power. Low efficiency of the solar PV module leads to research and improvement about control technology of different sub-modules of solar based renewable energy generation system interfaced with the existing grid. Generally, the photovoltaic system rating is constrained by the efficiency of percentage output power obtained from the PV panel. In order to achieve this objective , controller to extract the maximum power from solar panel is designed and incorporated in the system known as Maximum power point tracking (MPPT). The return on investment is feasible with various constraints like environmental factors, other internal and external factors, only when the power output is optimum and maximum with the existing operating conditions. The maximum energy production that is power should be extracted from the solar panel in the given conditions. This process is called maximum powerpoint tracking. The point at each the proposed aim is reached, is called point of maximum power. The efficiency of the entire photovoltaic energy generation depends on the operating characteristic point. The load should ultimately get the optimum possible power obtained from the photovoltaic generation at the operating characteristic point [5]. Therefore, there should be some control logic or control technique in form of a suitable controller which is designated as maximum power point tracking (MPPT) controller. This controller is designed in such a way that the maximum power is obtained from the photovoltaic module. In this work, Direct Prediction Method and P&O is implemented as a hybrid MPPT control scheme grid connected PV system based NPCMLI. MLI helpful in increasing dynamic performance of the PV system with the existing operating conditions. This MLI offers less harmonic disturbances and goes near to maximum possible power factor operation i.e. 1. The results are verified in...

Over the last ten years, the global wind energy capacity has increased rapidly and became the fastest developing renewable energy technology. The controllability of the wind turbines becomes more and more important as the power level of the turbines increases. Nowadays, for generating units above 1MW, variable speed concepts are usually applied that are either based on doubly fed induction machines or converter-driven synchronous machines. Synchronous generator are widely used in standalone WECS, Though the requirements are not fulfilled directly by the machine, the control strategy is used in both the stator as well as rotor side along with power electronic converters to fulfill the requirements stated above. In this paper, matrix converter has to be introduced for wind power applications. Major technical features and advantages are going to describe.

In the past few years there is a global transformation on technology and researches which aims to energy savings through the usage of renewable sources in many applications. With the need for usage of renewable energy increasing day by day, more efficient and innovative systems are to be created. The system created has to be a combination of the non-conventional resources, as implementing only one may not suffice the energy requirement. It has to be understood that every bit helps in saving energy, and so, domestic needs being the largest can be supplemented by smaller individual units of renewable sources. This has to be highly efficient and requiring less maintenance. A thought given to the above requirements of the new age has brought a new perspective to energy saving. The result has been created by combining a solar-aero-hydro system which is designed for efficient domestic usage.

A Compact dual slot ultra-wide band (UWB) Antenna for WLAN and X-Band applications is proposed. The projected antenna is designed for the planar ultra-wide band (UWB) antenna and ultra-wide band (UWB) with two band dismissals. The proposed antenna overall size is 30x40x1.6. The antenna comprises of Rectangular patch imprinted on the Flame Resistant (FR4) substrate with 50Ω input impedance. FR-4 is a composite material made out of fiberglass fabric woven with an epoxy pitch cover that is fire safe (self-dousing). "FR" implies fire resistant, and means that the material meets the standard. This patch consists of dual slot one for WLAN and one for X-band Satellite Communication System. The antenna intended with return loss (RL) >= 10db and frequency ranges between 3.1 to 10.6 GHz with VSWR<2. The antenna works for the applications of wireless local area network (WLAN) system (5.15 – 5.825 GHz), X-band downlink (7.25 - 7.75). The ultra-wide band frequency range for these wireless systems causes interference. To reduce the interference, band notching is done. The WLAN and X-Band satellite communication system bands are forbidden by inserting slots in the patch. The proposed antenna is having high gain at the pass bands while a sharp drop at the forbidden bands.