원문정보
초록
영어
More and more electric vehicles have been used in China, and many charging station has been built in China. Due to the reactive power loss caused by charging devices, the method to measure the power consumed by charging device is critical for power company. Based on impact loads generated by electric vehicles to the grid in fast charging mode, this paper studies the energy measurement method of electric vehicle charging mode. Since each phase current of charging post imbalance, to prevent the sum of each phase current vector of charging posts over the protection current threshold and the charging post breaker misusing in power circuit, preventing leakage circuit breaker current imbalance system is designed. Finally, this paper studies the power consumption detection methods of electric vehicle charging posts. By comparing the fast Fourier transform and wavelet analysis algorithms, an electric energy measurement device of electric vehicle charging machine based on FFT and wavelet analysis are proposed. Combined with fast data processing functions of DSP, the device can quickly and accurately measures electric vehicles charging amounts under different charging modes.
목차
1. Introduction
2. Charging Machine Load Energy Metering Model
2.1. Charging Machine Load Theory Analysis
2.2. Charging Machine Load Energy Metering Model
3. Electric Vehicle Charging Energy Measurement Method Based on FFT and Wavelet Analysis
3.1. Harmonic Energy Metering based on FFT
3.2. Harmonic Energy Metering based on Wavelet Analysis
3.3. Charging Machine Energy Metering based on FFT and Wavelet Analysis
3.4. Technology of Prevent RCCB Unbalanced Current
4. Power Consumption Detection Technology AND energy metering system Of Charger
4.1. Power Consumption Detection Technology of Charging Posts
4.2. Design of Charger Energy Metering Device
5. Conclusion
References