Abstract We have measured the units of photovoltaic modules presented in the string. The purpose is to get correct working voltage on inverter DC side. We use PV module and inverter data for normal test environment for doing calculations. We have also presented the finding correct number of strings linked to the inverter. We made calculation under conditions to get maximum... We have measured the units of photovoltaic modules presented in the string. The purpose is to get correct working voltage on inverter DC side. We use PV module and inverter data for normal test environment for doing calculations. We have also presented the finding correct number of strings linked to the inverter. We made calculation under conditions to get maximum active power from the inverter in all possible working scenarios. While calculating the inverter that limit the performances, we consider working performance that helps to eliminate inverter damage. We then applied the designed method to the PV modules in an industrial firm that produced inverter. Read More Read Less

Abstract To ensure optimum electricity generation, we need to bring dispersed generation that use wide range of technologies. The synchronous generators, asynchronous generators (AG) and power converters are the mostly used electric mechanisms for electricity generation for which we have used the transient stability of AG. Then we develop the typical model of the distribution network with connected AG. We have... To ensure optimum electricity generation, we need to bring dispersed generation that use wide range of technologies. The synchronous generators, asynchronous generators (AG) and power converters are the mostly used electric mechanisms for electricity generation for which we have used the transient stability of AG. Then we develop the typical model of the distribution network with connected AG. We have performed modelling and simulation with the help of MATLAB/ SIMULINK/Simpower systems toolbox software packages and we have used the AG with squirrel cage. Besides many short circuits are simulated in order to investigate dynamic behaviour of AG. We have used the parameters for analysing the rotor speed, active and reactive power, and currents of AG. Then we measured the critical clearing time for keeping stable operation of AG. We have tested and arrived at acceptable solutions. Read More Read Less

Abstract In the current work, we have given a simple parameter-based analytical approach for calculation of continuously variable transmission (CVT) optimal regulation curves in a small wind energy conversion (WEC) system. A CVT is placed between turbine’s rotor and an induction generator directly connected to the power system, enabling better utilization of available wind power. We have developed methods to calculate... In the current work, we have given a simple parameter-based analytical approach for calculation of continuously variable transmission (CVT) optimal regulation curves in a small wind energy conversion (WEC) system. A CVT is placed between turbine’s rotor and an induction generator directly connected to the power system, enabling better utilization of available wind power. We have developed methods to calculate the optimal CVT regulation curve in details and has been applied to the small WEC with rated power of 55 kW. Effects of generator’s winding resistance variation, caused by temperature change, have been studied further. During the testing we found that there is no impact of the calculated curves on the normally expected changes of the winding’s resistances. Read More Read Less