This paper assesses 4 years of operation of a 1.75 kW roof top solar PV system installed in a Sydney suburban house. The system consists of 10 PV panels, a DC/AC inverter, and a grid connected gross meter. Solar elect...This paper assesses 4 years of operation of a 1.75 kW roof top solar PV system installed in a Sydney suburban house. The system consists of 10 PV panels, a DC/AC inverter, and a grid connected gross meter. Solar electricity delivered to grid is verified with the results from a computer simulation package （PVSYST） by adopting the installed component specifications, operation conditions, and weather data of the site. The results show high consistency between the values of energy delivered to the grid measured by the energy company and the energy estimated by system simulation. New system performance indicator is developed and called the optimum performance compliance ratio （PCR）. It is a measure of the compliance of the output of the designed PV system with the output which would be produced by the same system with a solar tracker. This indicator provides system designers, contractors and energy providers with the actual capacity of the system that they can offer the end-users.展开更多
A mathematical approach was proposed to investigate the impact of high penetration of large-scale photovoltaic park(LPP) on small-signal stability of a power network and design of hybrid controller for these units.A s...A mathematical approach was proposed to investigate the impact of high penetration of large-scale photovoltaic park(LPP) on small-signal stability of a power network and design of hybrid controller for these units.A systematic procedure was performed to obtain the complete model of a multi-machine power network including LPP.For damping of oscillations focusing on inter-area oscillatory modes,a hybrid controller for LPP was proposed.The performance of the suggested controller was tested using a 16-machine 5-area network.The results indicate that the proposed hybrid controller for LPP provides sufficient damping to the low-frequency modes of power system for a wide range of operating conditions.The method presented in this work effectively indentifies the impact of increased PV penetration and its controller on dynamic performance of multi-machine power network containing LPP.Simulation results demonstrate that the model presented can be used in designing of essential controllers for LPP.展开更多
The Voltammetric properties of Pure Prednisolone in a direct method in the aqueous solution were studied. The substance has revealed a clear and major two reduction peaks at potential -1.22 Volt and -1.45 Volt against...The Voltammetric properties of Pure Prednisolone in a direct method in the aqueous solution were studied. The substance has revealed a clear and major two reduction peaks at potential -1.22 Volt and -1.45 Volt against the reference electrode （Ag/AgCI/SatKC1）. The calibration curve of the prednisolone in the Phosphate Buffer （pH = 7） has been studies. The relationship has been linear within the scope of concentration 0.398 × 10 6-3.846 ×10-6 mol. The correlation coefficients are 0.9981, 0.9958 for the first and second peaks. Another two calibration curves were also constructed in the presence of human serum and urine. Standard addition method was successful used to determine the drug in serum, urine as well as in the analysis of drug in the tablet. The molecular binding ofprednisolone with Albumin was also studied at different temperature. The Vant hoff equation is used to calculate the thermodynamic parameters, the results indicate that the （ion-ion） of binding suggested.展开更多
文摘This paper assesses 4 years of operation of a 1.75 kW roof top solar PV system installed in a Sydney suburban house. The system consists of 10 PV panels, a DC/AC inverter, and a grid connected gross meter. Solar electricity delivered to grid is verified with the results from a computer simulation package （PVSYST） by adopting the installed component specifications, operation conditions, and weather data of the site. The results show high consistency between the values of energy delivered to the grid measured by the energy company and the energy estimated by system simulation. New system performance indicator is developed and called the optimum performance compliance ratio （PCR）. It is a measure of the compliance of the output of the designed PV system with the output which would be produced by the same system with a solar tracker. This indicator provides system designers, contractors and energy providers with the actual capacity of the system that they can offer the end-users.
文摘A mathematical approach was proposed to investigate the impact of high penetration of large-scale photovoltaic park(LPP) on small-signal stability of a power network and design of hybrid controller for these units.A systematic procedure was performed to obtain the complete model of a multi-machine power network including LPP.For damping of oscillations focusing on inter-area oscillatory modes,a hybrid controller for LPP was proposed.The performance of the suggested controller was tested using a 16-machine 5-area network.The results indicate that the proposed hybrid controller for LPP provides sufficient damping to the low-frequency modes of power system for a wide range of operating conditions.The method presented in this work effectively indentifies the impact of increased PV penetration and its controller on dynamic performance of multi-machine power network containing LPP.Simulation results demonstrate that the model presented can be used in designing of essential controllers for LPP.
文摘The Voltammetric properties of Pure Prednisolone in a direct method in the aqueous solution were studied. The substance has revealed a clear and major two reduction peaks at potential -1.22 Volt and -1.45 Volt against the reference electrode （Ag/AgCI/SatKC1）. The calibration curve of the prednisolone in the Phosphate Buffer （pH = 7） has been studies. The relationship has been linear within the scope of concentration 0.398 × 10 6-3.846 ×10-6 mol. The correlation coefficients are 0.9981, 0.9958 for the first and second peaks. Another two calibration curves were also constructed in the presence of human serum and urine. Standard addition method was successful used to determine the drug in serum, urine as well as in the analysis of drug in the tablet. The molecular binding ofprednisolone with Albumin was also studied at different temperature. The Vant hoff equation is used to calculate the thermodynamic parameters, the results indicate that the （ion-ion） of binding suggested.
