随着大功率充电、无线充电等新技术的发展,充电状态的新能源汽车将产生越来越严重的电磁兼容问题。现有新能源汽车EMC强制性国家标准中,目前均没有对充电状态进行要求。相关强制性标准的修订均有加入充电状态EMC测试的计划。为支持国内...随着大功率充电、无线充电等新技术的发展,充电状态的新能源汽车将产生越来越严重的电磁兼容问题。现有新能源汽车EMC强制性国家标准中,目前均没有对充电状态进行要求。相关强制性标准的修订均有加入充电状态EMC测试的计划。为支持国内标准的制修订,本文在欧盟法规ECE R 10的基础上,进行整车充电状态的电磁兼容试验对比,研究合适的试验条件、合理的要求值,以推进相关标准、测量方法的制定,并以射频辐射发射试验为例对试验结果进行详细说明。展开更多
Applications of electric vehicles need to build a large number of charging stations. The electric vehicle charging stations communicate with the grid. In V2G (vehicle to grid) mode, electric vehicles can be used as ...Applications of electric vehicles need to build a large number of charging stations. The electric vehicle charging stations communicate with the grid. In V2G (vehicle to grid) mode, electric vehicles can be used as energy storage units and transfer power to the grid. The electric vehicles charge at night to reduce the cost and the grid load, simultaneously to fill the valley. When grid load increases, electric vehicles' batteries discharge to the grid to improve the stability of the grid. As distributed storage units, electric vehicles are important components of the smart grid. In this paper, the three-phase PWM (pulse width modulation) rectifier used for smart charging and discharging system of electric vehicles are analyzed and designed. This paper includes the principle of PWM rectifier-inverter and direct current control strategy. Also, the SVPWM (space vector pulse width modulation) and system design of three-phase PWM rectifiers are analyzed. A 10 kW prototype is developed. Simulation and experiment results show that the three-phase PWM rectifiers reach the unit power factor. From the experimental results, PWM rectifier implements the sinusoidal grid current and achieves the unit power factor.展开更多
文摘随着大功率充电、无线充电等新技术的发展,充电状态的新能源汽车将产生越来越严重的电磁兼容问题。现有新能源汽车EMC强制性国家标准中,目前均没有对充电状态进行要求。相关强制性标准的修订均有加入充电状态EMC测试的计划。为支持国内标准的制修订,本文在欧盟法规ECE R 10的基础上,进行整车充电状态的电磁兼容试验对比,研究合适的试验条件、合理的要求值,以推进相关标准、测量方法的制定,并以射频辐射发射试验为例对试验结果进行详细说明。
文摘Applications of electric vehicles need to build a large number of charging stations. The electric vehicle charging stations communicate with the grid. In V2G (vehicle to grid) mode, electric vehicles can be used as energy storage units and transfer power to the grid. The electric vehicles charge at night to reduce the cost and the grid load, simultaneously to fill the valley. When grid load increases, electric vehicles' batteries discharge to the grid to improve the stability of the grid. As distributed storage units, electric vehicles are important components of the smart grid. In this paper, the three-phase PWM (pulse width modulation) rectifier used for smart charging and discharging system of electric vehicles are analyzed and designed. This paper includes the principle of PWM rectifier-inverter and direct current control strategy. Also, the SVPWM (space vector pulse width modulation) and system design of three-phase PWM rectifiers are analyzed. A 10 kW prototype is developed. Simulation and experiment results show that the three-phase PWM rectifiers reach the unit power factor. From the experimental results, PWM rectifier implements the sinusoidal grid current and achieves the unit power factor.