Efekat prelaska sa konvencionalne na konzervacijsku obradu i setvu pšenice, soje, stočnog graška i pasulja

These paper presents and analyzes the results achieved in assays of production wheat, soybean, bean, which is set to determine exploitation, energy and environmental effects of land use conservation tillage and direct seeding. The work will be displayed along side conventional and conservation planting these cultures of working hours,fuel, yield, comparative two different conceptions of cultivation and sowing.U radu se prezentuje i analizira ostvareni rezultati na ogledima pšenice, soje, pasulja koji je postavljen radi utvrđivanja eksploatacionih, energetskih i ekoloških efekata u primeni konzervacijske obrade zemljišta direktne setve. U radu će se prikazati uporedo konvencionalna i konzervacijska setva navedenih kultura i analiza utroška radnih sati, goriva, prinosa, uporedne radne operacije dve različite koncepcije obrade zemljišta i setve

Peer-to-Peer-Based Power Flow Control in Microgrids With Limited Voltage Harmonic Distortion

This paper proposes a novel primary level controller and coupling LCL filter design methodology for microgrid prosumer units The so-called decentralized peer-to-peer-based power flow control algorithm introduces a power exchange communication link between two contractees, namely a prosumer unit and any other unit, on the time scales of primary power flow controller. This can be regarded as feed-forwarding of power flow information between the units in close to real-time in order to attain almost instant power balancing within the system. When coupled with the conventional voltage and frequency droop primary control, as presented in the paper, and tested on a simulation model of one radial microgrid in the off-grid mode of operation, it showed enhanced static and dynamic performance. The study also investigated adverse influence of the communication link time delay. The paper addressed prosumer units microgrid voltage-forming role by proposing design and control methodology for the prosumer units’ LCL coupling filter. To that aim, thorough voltage and current harmonic emission analysis has been conducted, taking into account realistic span of a microgrid parameters’ values and presence of other units. The study and the simulation model tests revealed that the limited total voltage harmonic distortion becomes critical requirement in the off-grid model of operation