Noise generation circuit, self-check circuit, AFCI and photovoltaic power generation system

A technology of noise generation and self-test circuit, applied in arc fault circuit breaker and photovoltaic power generation system, self-test circuit, noise generation circuit field, can solve problems such as influence, AFCI and photovoltaic inverter can not work normally, to improve reliability performance, improve the service life, and avoid the effect of current damage

Active Publication Date: 2016-12-07
HUAWEI DIGITAL POWER TECH CO LTD
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Problems solved by technology

[0005] Embodiments of the present invention provide a noise generating circuit, a self-inspection circuit, an AFCI, and a photovoltaic power generation system, which are used to solve the problem of whether the self-inspection circuit in the AFCI is in the state of testing whether the function of the detection circuit i

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  • Noise generation circuit, self-check circuit, AFCI and photovoltaic power generation system
  • Noise generation circuit, self-check circuit, AFCI and photovoltaic power generation system
  • Noise generation circuit, self-check circuit, AFCI and photovoltaic power generation system

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Embodiment Construction

[0051] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0052] Taking the AFCI in the photovoltaic power generation system as an example, in the prior art, the AFCI is set in the photovoltaic inverter of the photovoltaic power generation system, and the AFCI may include a detection circuit for detecting whether there is a DC arc in the photovoltaic power generation system, and, A self-inspection circui...

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Abstract

The invention provides a noise generation circuit, a self-check circuit, an AFCI and a photovoltaic power generation system. The noise generation circuit comprises a power switch module, a noise generator and a capacitor; the noise generator is connected with the power switch module and the capacitor; the power switch module controls the noise generator to or not to generate a noise signal according to a self-check instruction; and the capacitor filters DC components from the noise signal when the noise generator generates the noise signal. According to the invention, noise signals are not generated beyond the self-check time, influence on the AFCI in the working state as well as on devices in a photovoltaic inverter in which the AFCI is arranged can be avoided, and normal work of the AFCI and the photovoltaic inverter are ensured.

Description

technical field [0001] Embodiments of the present invention relate to power supply technology, in particular to a noise generating circuit, a self-test circuit, an arc fault circuit interrupter (Arc Fault Circuit Interrupter: AFCI for short) and a photovoltaic power generation system. Background technique [0002] Photovoltaic power generation system is a power generation system that converts solar energy into electrical energy. In view of the advantages of photovoltaic power generation system, such as long service life, no pollution to the environment, independent power generation and grid-connected operation, more and more places choose to use photovoltaic power generation system as a power supply. At present, the above-mentioned photovoltaic power generation system is mainly composed of multiple solar panels, photovoltaic inverters, etc., wherein the solar panels and photovoltaic inverters are connected through cables and terminals. [0003] In the prior art, the above-m...

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Application Information

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IPC IPC(8): G01R35/00G01R31/14
CPCG01R31/14G01R35/007G01R35/00H02M3/10H02M3/155G01R31/3275G01R31/2827G01R31/2829H03B29/00H02H1/0015H02H7/20H02H3/044Y02E10/56G01R31/52G01R31/50H02S40/30H02S50/10G01R31/327H02H3/16
Inventor 张圣杰韩锦涛
Owner HUAWEI DIGITAL POWER TECH CO LTD
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