针对太阳电池组串热斑效应,研究太阳电池组串热斑的防治策略。首先从防治成本、功率损耗、热斑温度和组串输出功率4个技术指标总结和对比了现有太阳电池组串热斑防治策略,给出了热斑防治的评估方法。然后,提出一种串入电阻的太阳电池组串热斑防治策略。该策略利用串入的电阻分担热斑电池承受的反向电压,降低了热斑电池功率损耗和温度。设计了由电压比较器、功率MOS管、三极管、分压电阻等组成的防治电路,并给出防治电路的防治原理。最后,通过仿真与实验,验证文中防治策略的效果。与传统的解决方案对比分析表明,该文所提热斑防治策略,具有热斑电池温度低、太阳电池组串输出功率大的优点。
Abstract
Aiming at the hot spot effect of PV（photovoltaic） series, this paper studies the suppressing strategies of hot spot of PV series. Firstly, the existing hot spot suppressing strategies of PV series are summarized and compared from the aspects of suppressing cost, power loss, hot spot temperature and output power, and an evaluation method of hot spot suppressing strategies is given. Then, a new hot spot suppressing strategy is proposed by using serial resistance. The designed circuit of the proposed strategy consists of voltage comparator, MOSFET, triode, voltage divider, and the principle are analyzed. Finally, the effectiveness of the suppressing strategy is verified by simulation and experiment. Comparing with the traditional solutions, the proposed hot spot suppressing strategy has the advantages of low temperature and large output power of hot spot cells.
关键词
太阳电池 /
温度 /
电压控制 /
热斑控制 /
功率损耗
Key words
solar cells /
temperature /
voltage control /
hot spot control /
power loss
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基金
河北省自然科学基金面上项目（E2021202068; E2019202481）
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