JP2010187513A5 - - Google Patents
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- JP2010187513A5 JP2010187513A5 JP2009031439A JP2009031439A JP2010187513A5 JP 2010187513 A5 JP2010187513 A5 JP 2010187513A5 JP 2009031439 A JP2009031439 A JP 2009031439A JP 2009031439 A JP2009031439 A JP 2009031439A JP 2010187513 A5 JP2010187513 A5 JP 2010187513A5
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- Prior art keywords
- ground fault
- inverter
- power
- power source
- ground
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- 238000001514 detection method Methods 0.000 description 4
Description
本発明の第２の側面によって提供される系統連系インバータシステムは、本発明の第１の側面によって提供される直流地絡検出装置と、前記直流地絡検出装置が接続される直流電源で生成される直流電力を交流電力に変換して電力系統に供給するインバータと、を備えた系統連系インバータシステムであって、前記直流電源と前記インバータとの接続を遮断する遮断手段と、前記直流地絡検出装置により地絡が検出された場合に、前記インバータを停止させ、あるいは、前記遮断手段により前記直流電源と前記インバータとの接続を遮断させる制御装置と、を備えている。 A grid-connected inverter system provided by the second aspect of the present invention is generated by a DC ground fault detection device provided by the first aspect of the present invention and a DC power source to which the DC ground fault detection device is connected. An inverter that converts the DC power to be converted into AC power and supplies the power to the power system, the system-connected inverter system comprising: a disconnecting unit that disconnects the connection between the DC power source and the inverter; And a control device that stops the inverter when the ground fault is detected by the fault detection device, or shuts off the connection between the DC power source and the inverter by the shut-off means.
以下、スイッチＳＷの切り替えによる地絡電流の検出について、図２〜図５を用いて説明する。 Hereinafter, the detection of the ground fault current due to switching of the switch SW, will be described with reference to FIGS.
本実施形態においては、直流電源１内部の直列接続された電池の間で地絡事故が発生した場合、接地される点が第１接地点ｃ１と第２接地点ｃ２との間で切り替えられるので、地絡電流IpgおよびIngが変化する。したがって、一方に切り替えられたときに、地絡電流IpgとIngとが相殺されて地絡事故を検出できない場合でも、他方に切り替えられたときに地絡事故を検出することができる。 In the present embodiment, when a ground fault occurs between the batteries connected in series inside the DC power source 1 , the point to be grounded is switched between the first ground point c1 and the second ground point c2. , The ground fault currents Ipg and Ing change. Therefore, even when the ground fault current Ipg and Ing cancel each other when switching to one and the ground fault cannot be detected, the ground fault can be detected when switched to the other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009031439A JP2010187513A (en) | 2009-02-13 | 2009-02-13 | Dc ground fault detector and system linkage inverter system including the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009031439A JP2010187513A (en) | 2009-02-13 | 2009-02-13 | Dc ground fault detector and system linkage inverter system including the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2010187513A JP2010187513A (en) | 2010-08-26 |
| JP2010187513A5 true JP2010187513A5 (en) | 2012-01-26 |
Family
ID=42767816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2009031439A Pending JP2010187513A (en) | 2009-02-13 | 2009-02-13 | Dc ground fault detector and system linkage inverter system including the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2010187513A (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012083175A (en) * | 2010-10-08 | 2012-04-26 | Sanyo Electric Co Ltd | Grounding detecting device |
| WO2012046613A1 (en) | 2010-10-08 | 2012-04-12 | 三洋電機株式会社 | Ground fault detection circuit, and ground fault detection device |
| JP2013036915A (en) * | 2011-08-10 | 2013-02-21 | Sanyo Electric Co Ltd | Earth detector |
| JP5787781B2 (en) * | 2011-01-31 | 2015-09-30 | 京セラ株式会社 | Solar power system |
| JP5415480B2 (en) * | 2011-06-02 | 2014-02-12 | 中国電力株式会社 | Ground fault detection device, program |
| JP2014240767A (en) * | 2013-06-11 | 2014-12-25 | シャープ株式会社 | Grounding detection device |
| US20150168473A1 (en) * | 2013-12-18 | 2015-06-18 | Enphase Energy, Inc. | Method and apparatus for ground fault detection |
| JP6609984B2 (en) * | 2015-05-11 | 2019-11-27 | 富士電機株式会社 | Insulation resistance measuring method and apparatus |
| JP2017175795A (en) * | 2016-03-24 | 2017-09-28 | 東芝三菱電機産業システム株式会社 | Power conversion device and ground fault detection method therefor |
| US10848053B2 (en) | 2018-07-13 | 2020-11-24 | Kohler Co. | Robust inverter topology |
| US10756532B2 (en) | 2018-07-13 | 2020-08-25 | Kohler Co. | Ground fault minimization |
| JP7276814B2 (en) * | 2019-02-19 | 2023-05-18 | 三洋電機株式会社 | Leakage detection device, vehicle power supply system |
| JP7232564B2 (en) * | 2019-06-07 | 2023-03-03 | 光商工株式会社 | Insulation resistance monitoring device for AC ungrounded circuits |
| CN111679653A (en) * | 2020-06-15 | 2020-09-18 | 中国南方电网有限责任公司超高压输电公司昆明局 | Intelligent fault recording device and direct-current field control loop fault positioning method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3107944B2 (en) * | 1993-04-23 | 2000-11-13 | 松下電器産業株式会社 | Earth leakage detection device |
| JP2001169561A (en) * | 1999-12-02 | 2001-06-22 | Canon Inc | Power supply device, controller and its control method |
| JP2001298851A (en) * | 2000-04-17 | 2001-10-26 | Tempearl Ind Co Ltd | Protecting device for photovoltaic power generation |
| JP5552218B2 (en) * | 2008-07-08 | 2014-07-16 | 株式会社日立製作所 | Power supply |
-
2009
- 2009-02-13 JP JP2009031439A patent/JP2010187513A/en active Pending
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