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Control device and method for composite switch of photovoltaic module

A photovoltaic module and composite switch technology, applied in the field of solar power generation, can solve the problems of inability to realize self-checking function, increase the difficulty of design and installation, etc., and achieve the effect of low cost, reduced difficulty of design and installation, and large node capacity.

Pending Publication Date: 2019-07-09
江苏辉伦太阳能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of directly laying a lead wire to connect the inverter and the quick shutdown device can only realize the unilateral shutdown of the quick shutdown device when there is a fault on the grid side, and cannot realize the self-test function. Lay another lead wire in the disconnection device to connect to the inverter to realize the self-test alarm function of the rapid shutdown device
In this way, a lead wire is introduced to transmit a fault signal containing another weak voltage, and the internal of the quick shutdown device needs to be reinforced with insulation for the signal, which further increases the difficulty of design and installation

Method used

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  • Control device and method for composite switch of photovoltaic module
  • Control device and method for composite switch of photovoltaic module
  • Control device and method for composite switch of photovoltaic module

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1: Self-test

[0051] Such as image 3 As shown, a self-test control method for a composite switch of a photovoltaic module includes the following steps:

[0052] Step 1: Start the self-test, the voltage detection module detects the voltage of the photovoltaic module or the temperature detection module detects the temperature of the photovoltaic module, and sends the detection information to the MCU control unit;

[0053] Step 2: The MCU control unit judges whether the voltage or temperature of the photovoltaic module is normal, if the voltage is less than V low or at temperatures above T h , the MCU control unit uploads real-time status information to the cloud platform through the LORA wireless communication module, returns to step 1, and re-checks itself; if the voltage is greater than V low and the temperature is lower than T h , and have normal operating conditions, then go to step 3;

[0054] Step 3: The MCU control unit uploads real-time status infor...

Embodiment 2

[0056] A method for successfully shutting down components on a cloud platform of a composite switch of a photovoltaic component comprises the following steps:

[0057] Step 1: Start the self-test, the voltage detection module detects the voltage of the photovoltaic module or the temperature detection module detects the temperature of the photovoltaic module, and sends the detection information to the MCU control unit;

[0058] Step 2: The MCU control unit judges whether the voltage or temperature of the photovoltaic module is normal, if the voltage is greater than V low and the temperature is lower than T h , the MCU control unit uploads real-time status information to the cloud platform through the LORA wireless communication module; the cloud platform sends a shutdown command, the MCU control unit receives the shutdown command, controls the MOSFET to shut down, and the current detection module detects the current of the photovoltaic module;

[0059] Step 3: Determine whethe...

Embodiment 3

[0062] A cloud platform failure shutdown component control method for a composite switch of a photovoltaic module, comprising the following steps:

[0063] Step 1: Start the self-test, the voltage detection module detects the voltage of the photovoltaic module or the temperature detection module detects the temperature of the photovoltaic module, and sends the detection information to the MCU control unit;

[0064] Step 2: The MCU control unit judges whether the voltage or temperature of the photovoltaic module is normal, if the voltage is greater than V low and the temperature is lower than T h , the MCU control unit uploads real-time status information to the cloud platform through the LORA wireless communication module; the cloud platform sends a shutdown command, the MCU control unit receives the shutdown command, controls the MOSFET to shut down, and the current detection module detects the current of the photovoltaic module;

[0065] Step 3: Determine whether the curren...

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Abstract

The invention discloses a control device and method for a composite switch of a photovoltaic module. LORA wireless communication is adopted to collect the data of and monitor a photovoltaic module, and thus, active and passive shutdown of the voltage output of the photovoltaic module by a photovoltaic junction box is realized. A LORA wireless communication module sends the current, voltage, temperature and on-off state of the photovoltaic module up to a cloud platform. The cloud platform can issue a turn-off instruction to manually turn off the module, and the photovoltaic module turned off bythe instruction can only be opened through an instruction issued by the cloud platform. After the fault is removed or the cloud platform issues a turn-on instruction, a relay switch in the compositeswitch is closed first, and then, an MOSFET switch in the composite switch is closed. The spread of fire on the photovoltaic module is restrained, and the risk of fire is reduced. Moreover, a faulty photovoltaic module can be isolated, the risk of electric shock in fire detection is greatly reduced, and the production and power generation of other parts of the photovoltaic system are not affected.

Description

technical field [0001] The invention discloses a control device and method for a composite switch of a photovoltaic module, and relates to the technical field of solar power generation. Background technique [0002] As a clean and renewable energy source, solar energy is a zero-pollution renewable power generation method, and its technology has been widely used at home and abroad. The photovoltaic power generation system mainly includes photovoltaic modules, junction boxes, inverters, etc. The photovoltaic module converts the received solar energy into DC power, and the inverter converts the DC power into AC power, which is integrated into the grid or directly supplied to customers. However, due to the high voltage and energy of photovoltaic modules themselves, when emergencies (earthquakes, fires, etc.) occur, these photovoltaic modules with high voltage and high energy need to be isolated from other parts of the photovoltaic power generation system to prevent photovoltaic...

Claims

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Application Information

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IPC IPC(8): H02J1/12
CPCH02J1/12
Inventor 詹国敏肖遥王祺孙建华韩怀冰朱笛笛
Owner 江苏辉伦太阳能科技有限公司
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