Jiangsu Hongde technology development co., LTD

What is photovoltaic energy storage?

2019-04-10

What is energy storage? Energy storage mainly refers to the storage of electrical energy. Energy storage is a term in petroleum reservoirs and represents the ability of reservoirs to store oil and gas. Energy storage itself is not an emerging technology, but it has just emerged from an industrial perspective and is in its infancy.

Talking about the Monitoring Networking Mode of Multiple Inverter Application Cases in Distributed System

2019-04-10

Through the above data, it is not difficult to find that the multi-machine integration monitoring solution provided by Shengnengjie not only avoids the high hardware cost of the scheme 1, but also reduces the initial investment cost of the power station owner, and avoids the construction difficulty of the scheme 2 and the waterproof defense. Dust troubles greatly improve the reliability of power station monitoring, and can be widely applied to any distributed photovoltaic power station, which can be described as a monitoring tool for distributed photovoltaic power plants. Conclusion: Distributed photovoltaics are getting more and more popular, and the general public has more and more understanding of photovoltaic knowledge. As a leader in the inverter industry, Shengnengjie Technology is always at the forefront of technological innovation, and is committed to providing high-reliability, high-priced inverter host solutions and monitoring solutions to the public, contributing to the realization of photovoltaic parity online.

Three major types of problem detection methods for photovoltaic modules

2019-04-10

Threemajortypesofproblemdetectionmethodsforphotovoltaicmodules Thephotovoltaicmoduleisthecorecomponentofphotovoltaicpowergeneration.Inordertooperatethephotovoltaicpowerstationnormally,itisnecessarytoinspectandmaintainthecomponentsofthephotovoltaicpowerplant.Commonproblemswithphotovoltaicmodulesare:hotspots,cracks,andpowerattenuation.Sincethesequalityproblemsarehiddeninsidethepanel,orafterthePVpowerplantisoperatedforaperiodoftime,itisdifficulttoidentifywhenthepanelisinthefieldofacceptance,anditisnecessarytouseprofessionalequipmentforPVmoduleinspection. Causesofhotspotformationanddetectionmethodsofphotovoltaicmodules Thehotspotofthephotovoltaicmodulemeansthatthecomponentisnotexposedtosunlightduetothesunlight,sothatthecoveredpartheatsupmuchmorethantheuncoveredpart,causingtheburntdarkspottobeoverheated. Theformationofhotspotsinphotovoltaicmodulesismainlycomposedoftwointrinsicfactors,namelyinternalresistanceanddarkcurrentofthecellitself. Thehotspotendurancetestisatestforaphotovoltaicmoduletodeterminetheabilityofasolarcellmoduletowithstandthehotspotheatingeffect.Thephotovoltaiccellmoduleistestedbyareasonabletimeandprocesstoindicatethatthephotovoltaiccellcanbeusedforalongperiodoftimeunderspecifiedconditions. Hotspotdetectioncanbedetectedbyaninfraredcamera.Theinfraredcameracanusethermalimagingtechnologytodisplaythemeasuredtargettemperatureanditsdistributioninavisibleheatmap. Causesofcrackformationanddetectionmethodsofphotovoltaicmodules Thecrackisasmallcrackinthebattery.Thecrackofthebatterywillacceleratethepowerattenuationofthebatteryandaffectthenormalservicelifeofthecomponent.Atthesametime,thecrackofthebatterywillexpandunderthemechanicalload,whichmaycauseopencircuitdamage.Crackingcanalsocausehotspoteffects.Theoccurrenceofcracksiscausedbyacombinationofvariousreasons.Theunevenforceofthecomponentsorthesharpshakingduringtransportationandreversalmaycausecracksinthebatterysheets. ThePVmoduleistestedforELimagingbeforeleavingthefactory,andtheinstrumentusedisanELdetector.Theinstrumentutilizestheelectroluminescenceprincipleofcrystallinesilicontocapturethenear-infraredimageofthecomponentusingahigh-resolutionCCDcameratoacquireanddeterminecomponentdefects.TheELdetectoriscapableofdetectingthepresenceorabsenceofcracks,debris,solderjoints,brokengates,andabnormalitiesofsingle-cellbatterieswithdifferentconversionefficiencies.ThreemajortypesofproblemdetectionmethodsforPVmodulesQuicklycollectthemPowerattenuationclassificationandPVmoduledetectionmethodsPhotovoltaicmodulepowerattenuationreferstothephenomenonthattheoutputpowerofcomponentsdecreasesgraduallywiththeincreaseofilluminationtime.Thepowerattenuationofphotovoltaicmodulescanberoughlydividedintothreecategories:thefirstcategory,componentpowerattenuationduetodestructivefactors;thesecondcategory,theinitialphotoinducedattenuationofcomponents;thethirdcategory,theagingattenuationofcomponents.Amongthem,thefirsttypeisthecontrollableattenuationduringtheinstallationofphotovoltaicmodules.Forexample,strengtheningtheunloading,reversing,andinstallationqualitycontrolofphotovoltaicmodulescanreducetheprobabilityofcrackingandfragmentationofcomponentcells.Thesecondandthirdcategoriesarethetechnicalproblemsthatneedtobesolvedintheproductionprocessofphotovoltaicmodules.PVmodulepowerattenuationtestingcanbedonewiththePVmoduleI-Vcharacteristiccurvetester.Threemajortypesofproblemdetectionmethodsforphotovoltaicmodules Powerattenuationclassificationandphotovoltaicmoduledetectionmethod PVmodulepowerattenuationreferstothephenomenonthattheoutputpowerofthecomponentgraduallydecreasesastheilluminationtimeincreases.Thepowerattenuationofphotovoltaicmodulescanberoughlydividedintothreecategories: Inthefirstcategory,componentpowerattenuationduetodestructivefactors; Thesecondcategory,theinitialphotoinducedattenuationofthecomponent; Inthethirdcategory,theagingofcomponentsisattenuated. Amongthem,thefirsttypeisthecontrollableattenuationduringtheinstallationofphotovoltaicmodules.Forexample,strengtheningtheunloading,reversing,andinstallationqualitycontrolofphotovoltaicmodulescanreducetheprobabilityofcrackingandfragmentationofcomponentcells. Thesecondandthirdcategoriesarethetechnicalproblemsthatneedtobesolvedintheproductionprocessofphotovoltaicmodules.PVmodulepowerattenuationtestingcanbedonewiththePVmoduleI-Vcharacteristiccurvetester.