Circuit for detecting insulation fault of solar battery

A technology of solar cells and solar panels, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve problems such as insufficient familiarity, and achieve the effect of simple and practical circuits

Inactive Publication Date: 2010-04-28
SHENZHEN MEIKAI ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing solar controllers or inverters only carry out safety tests such as high voltage resistance on the product itself, and when actually using solar controllers or inverters to form a solar energy system, it is easy to cause field wiring errors (zero line and bottom line) Mixed connection), assembly personnel are not familiar with the product and other reasons cause artificial leakage problems, and because most of the current solar energy equipment is not equipped with insulation fault detection lines, it is impossible to deal with this leakage problem in real time

Method used

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  • Circuit for detecting insulation fault of solar battery
  • Circuit for detecting insulation fault of solar battery
  • Circuit for detecting insulation fault of solar battery

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Embodiment Construction

[0011] Please refer to Figure 1 to Figure 2 Shown is the best embodiment of the present invention. The practical field of the present invention is solar photovoltaic systems, usually such photovoltaic systems include solar panels, solar controllers (inverters / chargers), and other solar system components (AC power grids / household appliances / battery batteries) , because it is a power system, and some systems are used in civilian use, so the requirements for leakage current are relatively strict, which requires good grounding performance. The insulation fault detection circuit of the present invention is an application module circuit for detecting insulation faults in a solar controller (inverter / charger).

[0012] Please continue to refer figure 2 As shown, the operational amplifier circuit only outputs a normal level signal when the positive and negative poles of the solar panel are well insulated from the ground. When there is a problem with the insulation between the pos...

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Abstract

The invention relates to a circuit for detecting an insulation fault of a solar battery. The detecting circuit comprises at least one operational amplifier, a plurality of resistors and a testing end which is connected with the anode (cathode) of a solar panel. The circuit has the obvious advantage of detecting the insulation problem caused by a field wiring problem by diagnosing whether an insulation problem exists after the solar panel is connected, and effectively detecting the insulation problem caused by the ageing problem of devices because of the long-term use of solar products.

Description

【Technical field】 [0001] The invention relates to an insulation fault detection circuit, in particular to a solar cell insulation fault detection circuit aimed at the positive and negative poles of a solar cell panel. 【Background technique】 [0002] Insulation protection is a basic safety guarantee for the power generation and power supply system using solar panels, especially for solar products connected in parallel with the grid or civilian solar products, there are strict regulations on the leakage current in the system. However, the existing solar controllers or inverters only carry out safety tests such as high voltage resistance on the product itself, and when actually using solar controllers or inverters to form a solar energy system, it is easy to cause field wiring errors (zero line and bottom line) Mixed connections), assembly personnel are not familiar with the product and other reasons cause artificial leakage problems, and because most of the current solar energ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02
Inventor 曾晓峰刘志敏刘伏根
Owner SHENZHEN MEIKAI ELECTRONICS
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