独立运行的家用光伏储能系统的设计和运行  

The Design and Operation of a Dependent Household PV System

作　　者：叶莎[1] 方鑫[1] 

机构地区：[1]三峡大学,湖北宜昌443002

出　　处：《电气开关》2016年第3期57-60,共4页Electric Switchgear

摘　　要：本文旨在保证光伏储能系统在白天和夜晚的发电量能达到家用电器的的电力需求量,高达2k W(230V)。这个光伏储能是由集成PV阵列、变换器、LC滤波器以及储能电池和储能电池的充电控制器构成的。该系统是基于评估白天和夜晚的电能需求量和负载曲线而设计出来的。在白天,从PV阵列中发出的电能供给电池和负载使用;在夜晚,则由电池给负载供电。通过对该系统的实施运行,记录下了为不同负载供电情况下的输出电压波形。对在白天和夜晚使用滤波器和不使用滤波器的情况下都进行了完整的谐波分析。结果表明,本文所设计的光伏系统完全可以满足家庭电器在白天和夜晚的用电需求。在不使用LC滤波器的情况下,变换器输出电压波形近似于矩形波,在白天和夜晚的总谐波失真值分别是38.85%和41.2%,这超出了IEEE的标准限度。而在加入了滤波器的情况下,变换器输出的的电压波形近似于正弦波,在白天和夜晚的电压总谐波失真值分别是6.85%和7.2%,这符合IEEE谐波失真应在低压级别(不超过2.3k V)的标准。This paper is aimed at securing the electricdemand of household appliances up to 2 k W at 230 V during day and night hours using photovoltaic（ PV） system. This is achieved by integration PV array,inverter,and LC filter with storage batteries and their charge controller. The system design is based on assessing the total electric power demand and the load profile during day and night hours. During day hours,the output from PV array charges the batteries and feed the load. During the night hours,the batteries feed the load. The system has been implemented and the output voltage waveforms have been recorded for different load demand values. A complete harmonic analysis has been done with and without using the filter at day and night hours. The results show that the designed system succeeded in feeding the household appliances during day and night hours. Without using LC filter,the inverter output voltage waveforms are close to be square in waveform with total harmonic distortion（ THD） values of 38. 85% and 41. 2% during day and night hours respectively,which exceeds the IEEE standard limits. By using LC filter,The inverter output voltage waveforms are close to be sinusoidal in waveform with THD values of 6. 85% and 7. 2% during day and night hours respectively,which match the IEEE standards limits for harmonic distortions in the low voltage class（ voltage less than 2. 3 k V）.

关 键 词：充电调节器 谐波 推挽式变换器 PV阵列 

分 类 号：TN624[电子电信—电路与系统]