Control method for insulation detection module of photovoltaic energy storage system

A technology of an insulation detection module and a control method, which is applied in the monitoring of photovoltaic systems, photovoltaic modules, photovoltaic power generation, etc., to achieve the effect of improving detection speed and accuracy, avoiding personal safety problems, and avoiding circuit damage

Active Publication Date: 2020-10-16
NINGBO GINLONG TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is currently a lack of a real-time and effective control method for the insulation detection module on the market

Method used

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  • Control method for insulation detection module of photovoltaic energy storage system
  • Control method for insulation detection module of photovoltaic energy storage system
  • Control method for insulation detection module of photovoltaic energy storage system

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Embodiment 1

[0033] see Figure 1-4 As shown, the control method for the insulation detection module of the photovoltaic energy storage system provided by the present invention, the photovoltaic energy storage system includes at least two battery units 100 with a common DC bus, and the battery unit 100 is a power supply module and an energy storage module, wherein, The power supply module is a photovoltaic cell, and the energy storage module is a storage battery; each battery unit 100 is correspondingly equipped with an insulation detection module 110 for collecting and detecting the positive and negative pole-to-ground voltage or resistance of the battery unit 100, and the insulation detection module 110 is provided with a collection module, and each insulation detection module 110, each acquisition module and battery unit 100 are electrically connected to a control module 120 respectively, and the control module 120 can monitor the operating status of each battery unit 100. The control me...

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Abstract

The invention discloses a control method for an insulation detection module for a photovoltaic energy storage system. The control method comprises the following steps: sequentially numbering circuitsof battery units; presetting an insulation resistance threshold in the control module, and sending a detection instruction to each insulation detection module by the control module; each insulation detection module collecting the ground insulation resistance of the positive electrode and the negative electrode of each running battery unit and sending the collected information to the control module; if the insulation resistance to ground acquired by each battery unit is greater than an insulation resistance threshold value, the control module displaying that the positive and negative electrodesof each running battery unit are in a normal ground insulation state; meanwhile, the insulation detection modules on the battery units in multi-path operation being regularly switched and operated according to a sequence. Therefore, the ground insulation resistance of the anode and the cathode of the battery unit on the corresponding line can be collected and detected when the insulation detection module is in different switch switching states, and only the insulation detection module on one battery unit of the direct-current bus operates in each time period.

Description

technical field [0001] The invention relates to the technical field of photovoltaic energy storage systems, in particular to a control method for an insulation detection module of the photovoltaic energy storage system. Background technique [0002] In a photovoltaic energy storage system, the insulation resistance of the DC side to the ground represents the insulation performance of the DC system. If the insulation resistance is too low, it will cause the DC bus to discharge to the ground. In severe cases, it may cause system damage or even endanger people. Safety. For the safe use of the photovoltaic energy storage system, it is necessary to detect the insulation resistance of the positive and negative busbars to the ground. When the insulation resistance is less than the limit value, a fault will be prompted. As part of the battery units in the photovoltaic energy storage system will be placed in the outdoor environment, long-term exposure to the sun and rain will cause ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02G01R31/52H02S50/00
CPCG01R27/025G01R31/52H02S50/00Y02E10/50
Inventor 王一鸣许颇曹金远肖泓蔡瑞佳
Owner NINGBO GINLONG TECH
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