成果報告書詳細
管理番号20140000000556
タイトル*平成23年度中間年報 「新エネルギーベンチャー技術革新事業 新エネルギーベンチャー技術革新事業(太陽光発電) 太陽電池アレイ故障診断技術の開発」
公開日2014/9/18
報告書年度2011 - 2011
委託先名株式会社システム・ジェイディー 阪和電子工業株式会社 独立行政法人産業技術総合研究所
プロジェクト番号P10020
部署名イノベーション推進部
和文要約
英文要約Title: New Energy Venture Business Technology Innovation Program for Developments of Fault Diagnosis Systems for Photovoltaic Array (FY2009-FY2012) FY2011 Annual report

The diagnosis and monitoring of PV systems are important to minimize the outage period and maximize the lifetime yield of PV systems. The objective of this project is to develop the fault diagnosis technologies for PV systems, especially for the PV arrays. Even if the conventional diagnosis methods for PV array such as I-V measurement or Voc measurement can find the fault existence in the array, those methods could not locate the fault position in it. Even if infrared radiation (IR) photo can find the faulty module directly, we have to climb up on the roof to take the IR photo with risk. Moreover, those conventional methods require huge works to determine the faulty module especially in large-scale systems. Therefore, safer and easier methods for fault location should be developed. In this project, the detection and location technologies will be developed. The time domain reflectometry (TDR) has been chosen for the purpose. Moreover, the business plan to realize the fault detection systems and the maintenance service will be discussed.
The handheld prototype TDR tester had developed in FY2010, and the prototype has used on the on-site measurements at several actual PV systems for confirming the fault detection sensitivities in FY2011. Most of the sample PV systems were over 10 year operation. At the on-site measurements, not only the TDR testers but also the current-voltage (IV) measurements of strings and the infra-red (IR) measurements of modules were conducted. The prototype TDR tester could detect the by-pass diode failure in a module. Measuring many actual PV systems increase the experience and knowledge of relations between the TDR measurements results and PV faults. For more detailed analysis of fault detection sensitivities, the electro luminescence (EL) measurements of the failed modules were done. With EL measurements, it was confirmed that the TDR could detect the bus-bar failures in the module which cause the increase of series resistance.
The built-in type TDR test unit is also under developing. The technology is based on the handheld TDR tester, but the add-on technologies for installing in the power conditioner or the junction box are needed.
Demonstrations of the prototype TDR tester and discussions were conducted with several PV modules manufactures. They requested that the relations of types of detectable failures with TDR results should be clarified. Also, the demonstrations and discussions with PV installers and users were conducted. Moreover, the prototype TDR tester was presented at the PV exhibition. Manufactures, installers, and users showed the interests for the TDR tester. The business plans not only for selling the TDR testers but also the supporting the users were discussed. The target users of the tester will be the PV module manufactures and system integrators.
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