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Solar cell battery and photoelectric generation system

A technology of solar battery packs and solar cells, applied in photovoltaic power generation, light radiation generators, batteries, etc., can solve problems such as uncontrollable impacts

Inactive Publication Date: 2003-01-08
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But even in this case, in a state where some part of the circuit inadvertently creates a ground defect, if you touch a different part of the circuit, you can't control the effect on the human body

Method used

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  • Solar cell battery and photoelectric generation system
  • Solar cell battery and photoelectric generation system
  • Solar cell battery and photoelectric generation system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] figure 2 A preferred embodiment of the present invention is shown. exist figure 2 In the solar cell string 200 shown, six solar cell modules 103 designed to have similar output characteristics are connected in series and have a positive terminal 101 and a negative terminal 102 . As the solar cell module 103, a module having a bypass diode is preferably used. Moreover, the positive terminal 101 and the negative terminal 102 can be optionally connected to a DC side or a load (both of which are not shown).

[0042] In this embodiment, the solar battery string 200 is grounded at a point 104 on the circuit between the second module and the third module counted from the negative terminal of the battery string.

[0043] More specifically, in this embodiment, V 1 +2V 2 =0.

[0044] Therefore, the maximum value of Eff at maximum output can be minimized, and any impact on the heart of the electric shock when your hand touches certain parts of the circuit of the solar cell...

Embodiment 2

[0048] image 3 Another preferred embodiment of the invention is shown. image 3 The middle numeral 300 refers to a solar cell string including a plurality of solar cell modules; 303 refers to a non-isolated inverter; 304 refers to a circuit breaker with an earth leakage circuit breaker; 305 refers to a load; and 306 refers to an industrial power system. Reference numeral 301 refers to the negative terminal of the DC side of the inverter 303; 302 refers to the positive terminal of the DC side of the inverter 303; which are respectively connected to the negative terminal and the positive terminal of the solar battery string 300.

[0049] The preferred inverter used in this embodiment is an inverter that keeps the ground voltage of the positive terminal 302 of the DC side or the negative terminal 301 of the DC side controlled to a constant value.

[0050] For example, if the ground voltage at the DC side negative terminal 301 is kept controlled to V 4 , the potential differenc...

Embodiment 3

[0055] Figure 4 Another preferred embodiment of the invention is shown. This embodiment is a modification to embodiment 2, it is the same as embodiment 2, only image 3 The solar cell string 300 shown becomes a solar cell group 400 (a solar cell group in a narrow sense).

[0056] In this embodiment, if the ground voltage of the DC side negative terminal 301 is kept controlled to V 4 , the potential difference between the positive and negative terminals at the maximum output of the solar cell group 400 is V 5 , the solar cell stack is designed to satisfy V 4 4 +V 5 >0 relationship. On the other hand, if the ground voltage of the DC side positive terminal 302 is kept controlled to V 6 , the potential difference between the positive and negative terminals at the maximum output of the solar cell group 400 is V 5 , the solar cell stack is designed to satisfy V 6-V 5 6 -V 5 >0 relationship.

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PUM

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Abstract

A solar-battery array comprising a plurality of solar batteries, which is characterized by satisfying the relationship of V2 < 0 and V1 + V2 > 0, where V1 is the voltage to ground of the positive-pole terminal at the time of maximum output of the solar-battery array, and V2 is the voltage to ground of the negative-pole terminal at the time of maximum output of the same and a photovoltaic power generation system having such an array are disclosed, whereby the effects of an electric shock on the human body can lessen even when you touch any electric circuit of the solar-battery arrays.

Description

technical field [0001] The present invention relates to a solar cell group having a plurality of solar cells, and a photovoltaic power generation system having such a solar cell group. Background technique [0002] In recent years, photovoltaic power generation system has attracted people's attention as a clean new energy supply device. When they are used as power sources for outdoor signs, or power sources for watches or clocks, in some cases a single solar cell unit (or solar cell module) and a battery are combined to form a photovoltaic power generation system. However, when the photovoltaic power generation system is used in public buildings, buildings, power plants, etc., the photovoltaic power generation system is usually designed to have an electric power of several kilowatts (kW) or more. On the other hand, the electric power of each solar cell unit or solar cell module is only a few watts (W) to several hundreds of watts. Therefore, in a photovoltaic power generat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/042H01L31/02
CPCY10S323/906H01L31/02021Y10S136/293H02J3/382Y02E10/563Y02B10/14H02J3/383Y10S136/291H02J2300/24H02J3/381Y02E10/56Y02B10/10
Inventor 都筑英寿高林明治
Owner CANON KK