JP6127824B2 - 太陽光発電用パワーコンディショナシステム - Google Patents
太陽光発電用パワーコンディショナシステム Download PDFInfo
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- JP6127824B2 JP6127824B2 JP2013163963A JP2013163963A JP6127824B2 JP 6127824 B2 JP6127824 B2 JP 6127824B2 JP 2013163963 A JP2013163963 A JP 2013163963A JP 2013163963 A JP2013163963 A JP 2013163963A JP 6127824 B2 JP6127824 B2 JP 6127824B2
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- 238000010248 power generation Methods 0.000 title claims description 23
- 238000001514 detection method Methods 0.000 claims description 63
- 238000002347 injection Methods 0.000 claims description 13
- 239000007924 injection Substances 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 13
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 230000007935 neutral effect Effects 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 2
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Description
Ig=Vd/(Rd+2Rg)
ここで、Vdは直流電力線間電圧である。
(変形例)
Claims (4)
- 太陽電池を系統電源に連系させる太陽光発電用パワーコンディショナシステムであって、
前記太陽電池から直流電力線を介して入力される直流電力を交流電力に変換し、前記交流電力を、前記系統電源に連系された交流電力線へ出力するインバータと、
前記直流電力線の地絡を検出する地絡検出部と、
を備え、
前記地絡検出部は、
前記系統電源の基本波に同期した前記基本波の非整数倍の周波数の電流信号を次数間高調波信号として生成するための次数間高調波制御信号を生成する制御信号発生部と、
前記次数間高調波制御信号に応じて、前記次数間高調波信号を前記交流電力線に注入する信号注入部と、
直列に接続されたキャパシタとインダクタとを有し、一端が前記交流電力線に接続され、他端が接地されているフィルタ部と、
前記フィルタ部、前記直流電力線及び前記交流電力線のうちの何れかにおける前記次数間高調波信号の電流成分の計測結果から、前記直流電力線の地絡を判定する判定部と、
を有する、太陽光発電用パワーコンディショナシステム。 - 前記インバータは、前記信号注入部として機能し、駆動信号に重畳された前記次数間高調波制御信号に応じた電流信号を前記次数間高調波信号として前記交流電力線に注入する、
請求項1に記載の太陽光発電用パワーコンディショナシステム。 - 前記地絡検出部は、
前記インバータが前記直流電力を変換して前記交流電力を出力する動作を行っているときに、前記直流電力線の地絡検出を行う定常検出モードと、
前記インバータが前記動作を行っていないときに、前記交流電力線に注入する前記次数間高調波信号の大きさを前記定常検出モードよりも大きくして、前記直流電力線の地絡検出を行う精密検出モードと、
を切り換える、
請求項1又は2に記載の太陽光発電用パワーコンディショナシステム。 - 前記直流電力線の間に設けられたインダクタを更に備える、
請求項1〜3の何れか1項に記載の太陽光発電用パワーコンディショナシステム。
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JP2015033312A JP2015033312A (ja) | 2015-02-16 |
JP6127824B2 true JP6127824B2 (ja) | 2017-05-17 |
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Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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CN104914352B (zh) * | 2015-05-07 | 2017-09-29 | 国家电网公司 | 一种基于谐波差值判别的nugs单相接地故障定位方法 |
CN105548755B (zh) * | 2015-12-11 | 2018-11-09 | 上能电气股份有限公司 | 通过单一接地绝缘阻抗检测网络检测逆变器交、直流侧接地的方法 |
CN110754034B (zh) * | 2017-07-18 | 2021-07-16 | 东芝三菱电机产业系统株式会社 | 接地检测器以及功率调节器 |
JP7072082B2 (ja) * | 2018-11-29 | 2022-05-19 | 株式会社東芝 | 電力供給システム、制御装置、および電力供給方法 |
JP6590387B1 (ja) * | 2018-12-07 | 2019-10-16 | タナシン電機株式会社 | 漏洩電流検出装置及び対地漏洩電流検出方法 |
US11721975B2 (en) * | 2020-07-10 | 2023-08-08 | His Majesty The King In Right Of Canada, As Represented By The Minister Of Natural Resources | System and method for use with microgrids having inverter-based distributed generators |
CN113381692A (zh) * | 2021-07-01 | 2021-09-10 | 湖南进芯电子科技有限公司 | 逆变器故障诊断方法、光伏功率优化器和光伏发电系统 |
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JPS58175922A (ja) * | 1982-04-05 | 1983-10-15 | 神鋼電機株式会社 | 半導体電力変換システム |
JPS6292719A (ja) * | 1985-10-16 | 1987-04-28 | 株式会社明電舎 | 太陽光発電の連系装置 |
JP4035775B2 (ja) * | 2003-06-25 | 2008-01-23 | 富士電機システムズ株式会社 | 自動車の漏電検知システム |
JP4430702B2 (ja) * | 2007-09-07 | 2010-03-10 | 関西電力株式会社 | 分散電源の単独運転検出装置 |
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