Photovoltaic system series-parallel mismatch loss ratio test device and test method thereof

A photovoltaic system and testing device technology, which is applied in the monitoring of photovoltaic systems, photovoltaic power generation, photovoltaic modules, etc., can solve the problems of high work intensity, lack of testing equipment for the series and parallel loss rate of photovoltaic systems, and difficult testing, so as to reduce the test intensity , cost reduction effect

Active Publication Date: 2016-02-03
蚌埠电子信息产业技术研究院 +1
View PDF9 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Since there is no relevant test device for measuring the series and parallel loss rate of photovoltaic systems, many testing institutions do not measure this indicator
Even the measurement is only to use a portable solar cell IV tester to measure the I-V curve of the disconnected components or strings one by one. Not only the work intensity is high, but more importantly, due to a long test cycle, errors caused by irradiance or temperature changes Or even exceed the specified requirements; or use a high-power DC high-voltage switching relay plus multiple portable solar battery IV testers to test the split device at the same time, but the power of one string can reach 10kW (voltage 1000V, current 10A), or even more High, the required high-power DC high-voltage switching relay is very expensi

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
  • Photovoltaic system series-parallel mismatch loss ratio test device and test method thereof
  • Photovoltaic system series-parallel mismatch loss ratio test device and test method thereof
  • Photovoltaic system series-parallel mismatch loss ratio test device and test method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] combined with Figures 1 to 5 The specific embodiment of the present invention is described further:

[0037] like figure 1 As shown, the photovoltaic system series-parallel mismatch loss rate test device includes a first IV curve test board 1 for testing the entire string or the entire bus string, and a second IV curve test for testing each component or each string 10 Board 2, parallel switching switch for parallel connection of components or strings 3, series switching switch for connecting components or strings in series 4, test switching switch 5 for component or string testing, RS232 interface conversion board 6 for communication with PC 9, The control panel 7 for controlling the switch, the solar irradiance meter 8 for measuring irradiance and temperature, and the PC 9 for controlling the switch and displaying the test results.

[0038] Each test channel is equipped with a test switch. The components of different channels are connected in parallel or disconnected ...

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 system series-parallel mismatch loss ratio test device and a test method thereof. The test device comprises a first IV curve test plate used for testing a whole string or string conflux, a plurality of second IV curve test plates used for testing a corresponding channel of each path of assemblies, series connection switching switches used for serial assemblies, parallel connection switching switches for parallel connection assemblies, test switching switches used for testing IV curves, an interface conversion plate, a PC, and a control panel. The test method additionally comprises testing once a whole IV curve based on a current test method, provides a reliable loss ratio result when the maximum power deviation of twice tests is less than a certain threshold, and substitutes a formula with the power average value of twice whole strings or stings after conflux for calculation, thereby obtaining more scientific and more reasonable measuring results.

Description

technical field [0001] The invention relates to the field of photovoltaic system performance detection, in particular to a series-parallel mismatch loss rate test device and a test method for a photovoltaic system. Background technique [0002] Photovoltaic systems are usually composed of photovoltaic modules, strings, combiner boxes, inverters and other equipment. Depending on the open circuit voltage of a single photovoltaic module and the input voltage range of a photovoltaic grid-connected inverter, multiple photovoltaic modules need to be connected in series to form a string, and multiple strings are connected in parallel through a combiner box and then connected to the inverter. Series-parallel mismatch losses in photovoltaic systems are caused by the interconnection of photovoltaic modules that do not have the same characteristics or experience different conditions causing problems to arise. For a photovoltaic system, the distance between each string is different, an...

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
IPC IPC(8): H02S50/00
CPCY02E10/50
Inventor 韩国华朱文星张济民朱炬王传才毛翌春邓允长孙松源
Owner 蚌埠电子信息产业技术研究院
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap