Title:
The power conditioner system for photovoltaics
Document Type and Number:
Japanese Patent JP6127824
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a power conditioner system for photovoltaic power generation capable of detecting fine ground fault of a DC power line.SOLUTION: A power conditioner system 100 for photovoltaic power generation according to one embodiment comprises: an inverter 10 converting a DC power inputted from a solar battery 1 via a DC power line 4 into an AC power, and outputting the AC power to an AC power line 5; and a ground fault detector 30 detecting ground fault of the DC power line 4. The ground fault detector 30 has: a control signal generator 31 generating an inter-order high harmonic wave control signal for generating an inter-order high harmonic current signal having a frequency of a non-integer multiple of a frequency of a fundamental wave of a system power supply 3; a signal injection part 10 injecting the inter-order high harmonic current signal to the AC power line 5 depending on the inter-order high harmonic wave control signal; a filter part 16; and a determination part 32 determining ground fault of the DC power line 4 from a measurement result of the inter-order high harmonic current signal in the filter part 16.
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Inventors:
Soji Nishimura
Application Number:
JP2013163963A
Publication Date:
May 17, 2017
Filing Date:
August 07, 2013
Export Citation:
Assignee:
Nissin Electric Co., Ltd.
International Classes:
H02H3/16; H02J3/38; H02M7/48
Domestic Patent References:
| JP62092719A | ||||
| JP58175922A | ||||
| JP2009065794A | ||||
| JP2005020848A |
Other References:
日新電機株式会社,単独運転検出装置(エネリンク)カタログ,[online],2013年 4月,[平成29年3月7日検索]インターネット
Attorney, Agent or Firm:
Yoshiki Hasegawa
Yoshiki Kuroki
Kenichiro Wada
Yoshiki Kuroki
Kenichiro Wada
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