Shenzhen Poweroak Newener Co., Ltd

Sanechips Technology Co., Ltd.

Shenzhen Uv-chemtech Co., Ltd.

Yongbo Zhang

Geng Qin

Gang Wang

Xiangzhu Yin

Hui Ma

Zhigang Wang

Mianzhi Wu

Jianhua Lei

Jie Hu

Xiaozhen Song

Yanchao Wang

Yapeng Wang

Huaihai Song

Chunpei Zhong

Dan Wen

The present application relates to a photovoltaic fault monitoring system, method and a storage medium. The photovoltaic fault monitoring system includes at least one group of photovoltaic arrays, each including multiple stages of photovoltaic modules connected in series and a processing module connected with the photovoltaic arrays. Each stage of photovoltaic modules includes a photovoltaic unit and a bound monitoring unit. The monitoring unit process and output a received communication signal when the photovoltaic unit is powered, while directly output the received communication signal when the photovoltaic unit loses power. The processing module acquires the communication signal from each monitoring unit to determine if any photovoltaic unit is faulty.

Method and system for photovoltaic fault monitoring, and storage medium

Energy management system controller

A leakage current detection circuit is used for detecting a leakage current, includes a main winding, an auxiliary winding, a detection module and a signal output module used for outputting a pulse signal with pulse signals with positive and negative alternations, wherein the main winding is connected to a leakage current detection end and coupled to the auxiliary winding, and the auxiliary winding is respectively connected to the signal output module and the detection module. During the auxiliary winding in a preset state and a leckage current occurred, the leakage current coupled to the auxiliary winding is superimposed with the pulse signal, so that the current signal detected by the detection module is greater than the current signal detected when the pulse signal with pulse signals with positive and negative alternations is not applied.

Leakage current detection circuit, method and leakage current detector

Disclosed is a current sampling circuit including a proportional current output circuit and a full differential common mode negative feedback circuit, specifically the proportional current output circuit is configured to calculate a current output from a power device according to a preset proportion to obtain a first proportional current and a second proportional current, and to output the first proportional current and the second proportional current to the full differential common mode negative feedback circuit; and the full differential common mode negative feedback circuit is configured to shunt respectively the first proportional current and the second proportional current using a full differential common mode negative feedback network with a bias current in microamps to obtain a first sampling current and a second sampling current, and to output constantly the first sampling current and the second sampling current. Further disclosed is a current sampling method.

Current sampling circuit and method

A detection circuit for a relative error voltage, including: a first current mirror, a second current mirror, a third current mirror, a current sink and resistors R, Rand R. A voltage signal to be detected Vaccesses the first current mirror via the resistor R, and a voltage signal to be detected Vaccesses the second current mirror via the resistor R; a mirrored-end of the first current mirror is connected to the current sink, and a mirroring-end thereof is connected to a mirrored-end of the third current mirror; a mirrored-end of the second current mirror is connected to the current sink, and a mirroring-end thereof is connected to a mirroring-end of the third current mirror; the current sink is grounded via the resistor R; and the third current mirror converts double-ended currents of the first and the second current mirrors to single-ended currents to output as voltage signals.

Detection circuit for relative error voltage

The present invention discloses novel aromatic ketone compounds with functional substitution groups at para- or meta positions which can be used as photo-initiators or effective components of photo-initiator mixtures for the photopolymerizations of ethylenically unsaturated systems. The preparation of these compounds is also disclosed.

Para&#x2014;or meso-functionalized aromatic ketone compounds, preparation methods thereof, and photopolymerization initiators comprising the same

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Shenzhen, China

Yongbo Zhang