Unlock instant, AI-driven research and patent intelligence for your innovation.

A detection system and method for photovoltaic array grounding impedance

A technology of photovoltaic array and grounding impedance, which is applied in the fields of grounding resistance measurement, photovoltaic system monitoring, photovoltaic power generation, etc., and can solve problems such as fire, inverter false alarm failure, loss, etc.

Active Publication Date: 2017-01-04
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If you are not prepared to measure the grounding impedance of its photovoltaic array, it may cause the inverter to report a fault by mistake, and the system cannot generate electricity, or it may cause a fire and cause greater losses.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A detection system and method for photovoltaic array grounding impedance
  • A detection system and method for photovoltaic array grounding impedance
  • A detection system and method for photovoltaic array grounding impedance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Such as figure 1 and figure 2 shown. A detection system for photovoltaic array grounding impedance, which uses a detection circuit connected to DSP to measure photovoltaic array grounding impedance. The detection circuit includes triode V2, power MOS tubes V6, V7, and V5, and the base of triode V2 passes through relay K1 and resistor R7 in sequence. Grounded, the base of the triode V2 is also connected to the positive pole of the photovoltaic array through the resistor R1, the emitter of the triode V2 is connected to the anode of a Zener diode V1, the cathode of the Zener diode V1 is connected to the positive pole of the photovoltaic array, and the collector of the triode V2 The electrode is connected to the gate of the power MOS transistor V6, the collector of the triode V2 is also connected to the anode of a Zener diode V3 through the resistor R2, the cathode of the Zener diode V3 is connected to the positive pole of the photovoltaic array, and the source of the pow...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a photovoltaic array grounding impedance detection system and method. A DSP controls enabling work of a photovoltaic array grounding impedance test circuit in an inverter. A relay is controlled by the DSP according to logic. Then a test voltage signal is sampled by an ADC of the DSP, and then calculation is performed via a control algorithm in software so that a grounding impedance value of a photovoltaic array can be tested. The grounding impedance value of the solar cell photovoltaic array within a wide voltage range can be detected, and the work state of the circuit can be controlled.

Description

technical field [0001] The invention relates to the field of photovoltaic array impedance detection systems, in particular to a photovoltaic array ground impedance detection system. Background technique [0002] Energy is the most fundamental driving force for social development and economic growth, and the basis for human survival. Human development and energy utilization are closely linked, especially in today's highly developed industry. Fossil energy sources such as coal, oil, and natural gas support the development of human society, but with the large-scale exploitation of these energy sources, resources have become increasingly depleted, and the environment has continued to deteriorate, and the contradiction between energy supply and demand has become increasingly prominent. In this situation, the whole world is looking forward to the use of solar photovoltaic power generation to develop pollution-free, clean and green energy. In the photovoltaic grid-connected power ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H02S50/00G01R27/20
CPCY02E10/50
Inventor 陈林贵余志勇童树卫毛翌春朱文星
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP