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Self-powered power circuit of photovoltaic system

A power circuit and photovoltaic system technology, applied in photovoltaic power generation, control/regulation systems, electrical components, etc., can solve the problems of increasing the circuit complexity and cost of monitoring devices, and achieve convenient testing and measurement, sophisticated circuit design, and components. less effect

Active Publication Date: 2014-03-19
无锡隆玛科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the commonly used photovoltaic monitoring device power supply circuit can only provide one voltage of 24V or 5V, so when in use, the monitoring device needs to perform secondary isolation on each part of the circuit system through DCDC, which increases the circuit complexity and complexity of the monitoring device circuit. cost

Method used

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  • Self-powered power circuit of photovoltaic system
  • Self-powered power circuit of photovoltaic system

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with specific drawings and embodiments.

[0024] Such as figure 1 , as shown in Figure 2:

[0025] The photovoltaic system self-power supply circuit provided by the present invention includes: a lightning protection circuit, a rectification filter circuit, a power change circuit, a PWM controller circuit, an output voltage feedback circuit, an output rectification filter circuit, and a coupling power change circuit and an output rectification filter circuit. circuit transformer T1. The input voltage enters the rectification and filtering circuit after passing through the lightning protection circuit, the output end of the rectification and filtering circuit is connected to the power changing circuit and the PWM controller circuit, and the PWM controller circuit is connected to and drives the power changing circuit. The output rectifying and filtering circuit includes a first output loop and a second ...

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Abstract

The invention provides a self-powered power circuit of a photovoltaic system. The power circuit comprises a lightning protection circuit, a rectifying filtering circuit, a power change circuit, a pulse width modulation (PWM) controller circuit, an output voltage feedback circuit, an output rectifying filtering circuit, a coupling power change circuit and a transformer T1 of the output rectifying filtering circuit. Input voltage enters the rectifying filtering circuit through the lightning protection circuit, the output end of the rectifying filtering circuit is connected with the power change circuit and the PWM controller circuit, and the PWM controller circuit is connected with and drives the power change circuit. The output rectifying filtering circuit comprises a first output loop and a second output loop which are mutually isolated. The output voltage feedback circuit is used for feeding sampling voltage in the first output loop and the second output loop to the PWM controller circuit. The self-powered power circuit is mainly used for isolation of multi-way output voltage.

Description

technical field [0001] The invention relates to a photovoltaic system self-power supply circuit, which can be widely applied to the power supply of a combiner box self-power supply monitoring device of a centralized or distributed solar power generation system. Background technique [0002] With the development of society, the demand for energy is becoming increasingly tense. China is very rich in solar energy resources. Accelerating the construction of photovoltaic power plants is not only in line with my country's national conditions, but will also more effectively promote the transformation of my country's economic structure and the optimization of energy structure. With the development of computer technology, people have higher and higher requirements for the monitoring of photovoltaic power plants, and the application of intelligent monitoring devices is becoming more and more popular. In this way, it is necessary to provide self-power supply for intelligent monitoring ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335H02M1/34H02M1/14
CPCY02E10/56
Inventor 杨朝辉郭志华
Owner 无锡隆玛科技股份有限公司
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