Characteristics Of Power Generation System Research Articles

Harmonic Analysis of Electric Transmission System of New Energy Vehicle

In order to improve the cruising range of new energy electric vehicles and solve the low efficiency of electric transmission system in low-speed driving stage, a space vector pulse width modulation algorithm is proposed. The simulation model is established by Matlab/Simulink software, and the test parameters of electric transmission system in the actual driving process of new energy electric vehicle are analyzed, and the harmonic distribution of line voltage of electric transmission system and the influence of battery bus voltage on harmonic content are explored. The actual test results show that reducing the difference between the bus voltage and the fundamental line voltage under actual electric transmission can reduce the harmonic content and improve the system efficiency. According to the characteristics of power generation system, a reliable motor optimization scheme is proposed to reduce harmonic content to improve the efficiency of electric transmission system of new energy vehicles.

Harmonic Analysis of Electric Transmission System of New Energy Vehicle

In order to improve the cruising range of new energy electric vehicles and solve the low efficiency of electric transmission system in low-speed driving stage, a space vector pulse width modulation algorithm is proposed. The simulation model is established by Matlab/Simulink software, and the test parameters of electric transmission system in the actual driving process of new energy electric vehicle are analyzed, and the harmonic distribution of line voltage of electric transmission system and the influence of battery bus voltage on harmonic content are explored. The actual test results show that reducing the difference between the bus voltage and the fundamental line voltage under actual electric transmission can reduce the harmonic content and improve the system efficiency. According to the characteristics of power generation system, a reliable motor optimization scheme is proposed to reduce harmonic content to improve the efficiency of electric transmission system of new energy vehicles.

The Assessment of Distributed Photovoltaic Capacity Credit in Courts Considering High Penetration

Due to the intermittent and volatility of photovoltaic power generation, it is generally considered that there is only electricity value and no capacity value. With the high penetration of large-scale distributed photovoltaic access to low-voltage distribution network, distributed photovoltaic will gradually become an important alternative energy source. Based on the theory and experience of domestic and international photovoltaic power generation capacity credit assessment, this paper studies the correlation between distributed photovoltaic season, diurnal power generation characteristics and load. This paper also studies the characteristics of power generation system and characteristics of the power distribution system under high penetration distributed photovoltaic access. A calculation method for the capacity credit of high penetration in multi-scenario courts is proposed to provide support for precision investment.

Energy harvesting using solar ORC system and Archimedes Screw Turbine (AST) combination with different refrigerant working fluids

In this research, an energy harvesting system was developed for power generation using a combination of an Archimedes Screw Turbine (AST) and a solar Organic Rankine Cycle (ORC) system. An AST was numerically used and optimized for producing mechanical power as an energy harvesting technique. Different structural parameters including the screw inclination angle, number of flights and the screw length were considered. A parabolic trough concentrator was numerically modeled as a heat source of the ORC system. Two different types of absorber were considered using a smooth and corrugated tube. Different ORC working fluids were investigated in the solar ORC system including R134a, R245ca, R245fa, R152a, R113, R11, and R114b. The results of numerical modeling were validated with experimental results and good agreement was found. The results revealed that R113 at the saturated condition at turbine inlet gave the highest ORC net power, ORC efficiency, and total efficiency compared to the other investigated working fluids. The solar PTC system with the corrugated tube showed the higher ORC net power, and overall efficiency compared to the smooth tube as the PTC receiver. The highest efficiency resulted in the screw length of 1.5 m was 58.24% with inclination angle of 25° and flight number of 1. Finally, the optimized characteristics of power generation system including a solar ORC system and a screw turbine (hybrid system) were presented to harvest energy. Application of the presented hybrid system is an acceptable way for increasing and optimizing the ORC power generation.

612 太陽光・風力ハイブリッド発電システムのゆらぎ特性について

612 太陽光・風力ハイブリッド発電システムのゆらぎ特性について