JP2014063993A - 零相変流器、地絡電流検出装置、パワーコンディショナ、及び零相変流器の故障検出方法 - Google Patents
零相変流器、地絡電流検出装置、パワーコンディショナ、及び零相変流器の故障検出方法 Download PDFInfo
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- H02H3/16—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass
- H02H3/167—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to fault current to earth, frame or mass combined with other earth-fault protective arrangements
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Abstract
【解決手段】零相変流器(ZCT)11は、挿通される複数の電力線の零相電流を検出する零相変流器であって、複数の電力線に加えて、一定の直流のオフセット電流が流れる線を挿通する。また、前記オフセット電流は、前記零相変流器が検出すべき零相電流のダイナミックレンジ、電流平衡時に検出される誤差電流の値、又は前記オフセット電流による消費電力、の少なくとも一つの要素によって決定される。
【選択図】図1
Description
挿通される複数の電力線の零相電流を検出する零相変流器であって、
前記複数の電力線に加えて、一定の直流のオフセット電流が流れる線を挿通することを特徴とする。
前記オフセット電流は、前記零相変流器が検出すべき零相電流のダイナミックレンジ、電流平衡時に検出される誤差電流の値、又は前記オフセット電流による消費電力、の少なくとも一つの要素によって決定されることを特徴とする。
挿通される複数の電力線の零相電流を検出する零相変流器であって、前記複数の電力線に加えて、一定の直流のオフセット電流が流れる線を挿通する零相変流器と、
前記零相電流に基づいて地絡電流を検出する地絡電流検出回路と、を備えることを特徴とする。
挿通される複数の電力線の零相電流を検出する零相変流器であって、前記複数の電力線に加えて、一定の直流のオフセット電流が流れる線を挿通する零相変流器と、
前記零相電流に基づいて地絡電流を検出する地絡電流検出回路と、
を備えることを特徴とする。
前記地絡電流検出回路で検出される電流が実質的にゼロとなった場合に、前記零相変流器に異常が発生したと判断することを特徴とする。
前記地絡電流検出装置により検出される電流の大きさが所定の閾値を超えた場合に、地絡事故が発生したと判断することを特徴とする。
前記一定の直流のオフセット電流は、前記複数の電力線の出力を制御するリレーを駆動させる動作電流であることを特徴とする。
それぞれが前記複数の電力線を有する複数の組毎に、別々の供給先に電力を供給可能であり、
複数の前記零相変流器は、前記複数の組を構成するそれぞれの複数の電力線の零相電流を検出し、
複数の前記リレーは、自身が電力の出力を制御する複数の電力線とともに前記零相変流器に挿通される一定の直流のオフセット電流によって駆動されることを特徴とする。
零相変流器に複数の電力線及び一定の直流のオフセット電流を流す線が挿通された零相変流器、及び前記零相変流器によって検出される零相電流に基づいて地絡電流を検出する地絡電流検出回路と、を備える地絡電流検出装置により前記零相変流器の故障を検出する方法であって、
前記オフセット電流がゼロのときに前記地絡電流検出装置から出力される基準電圧を取得するステップと、
前記オフセット電流を流したときに前記地絡電流検出装置から出力される出力電圧を監視するステップと、
前記地絡電流検出装置で検出される電流が実質的にゼロとなった場合に、前記零相変流器に故障のおそれがあると判断するステップと、
を含むことを特徴とする。
の正入力端子の電圧と同じ値である。
10 地絡電流検出装置
11、11a、11b ZCT(零相変流器)
12 地絡電流検出回路
20 入力電源
30 DC/DCコンバータ
40 インバータ
50 制御部
60、60a、60b リレー
111 第1のコイル
112 第2のコイル
113、113a、113b U相電力線
114、114a、114b O相電力線
115、115a、115b W相電力線
116、116a、116b オフセット電流線
121 抵抗
122 オペアンプ
Claims (9)
- 挿通される複数の電力線の零相電流を検出する零相変流器であって、
前記複数の電力線に加えて、一定の直流のオフセット電流が流れる線を挿通することを特徴とする零相変流器。 - 前記オフセット電流は、前記零相変流器が検出すべき零相電流のダイナミックレンジ、電流平衡時に検出される誤差電流の値、又は前記オフセット電流による消費電力、の少なくとも一つの要素によって決定されることを特徴とする、請求項1に記載の零相変流器。
- 挿通される複数の電力線の零相電流を検出する零相変流器であって、前記複数の電力線に加えて、一定の直流のオフセット電流が流れる線を挿通する零相変流器と、
前記零相電流に基づいて地絡電流を検出する地絡電流検出回路と、
を備えることを特徴とする地絡電流検出装置。 - 挿通される複数の電力線の零相電流を検出する零相変流器であって、前記複数の電力線に加えて、一定の直流のオフセット電流が流れる線を挿通する零相変流器と、
前記零相電流に基づいて地絡電流を検出する地絡電流検出回路と、
を備えることを特徴とするパワーコンディショナ。 - 前記地絡電流検出回路で検出される電流が実質的にゼロとなった場合に、前記零相変流器に異常が発生したと判断することを特徴とする、請求項4に記載のパワーコンディショナ。
- 前記地絡電流検出装置により検出される電流の大きさが所定の閾値を超えた場合に、地絡事故が発生したと判断することを特徴とする、請求項4又は5に記載のパワーコンディショナ。
- 前記一定の直流のオフセット電流は、前記複数の電力線の出力を制御するリレーを駆動させる動作電流であることを特徴とする、請求項4から5のいずれか1項に記載のパワーコンディショナ。
- それぞれが前記複数の電力線を有する複数の組毎に、別々の供給先に電力を供給可能であり、
複数の前記零相変流器は、前記複数の組を構成するそれぞれの複数の電力線の零相電流を検出し、
複数の前記リレーは、自身が電力の出力を制御する複数の電力線とともに前記零相変流器に挿通される一定の直流のオフセット電流によって駆動される
ことを特徴とする、請求項7に記載のパワーコンディショナ。 - 零相変流器に複数の電力線及び一定の直流のオフセット電流を流す線が挿通された零相変流器、及び前記零相変流器によって検出される零相電流に基づいて地絡電流を検出する地絡電流検出回路と、を備える地絡電流検出装置により前記零相変流器の故障を検出する方法であって、
前記オフセット電流がゼロのときに前記地絡電流検出装置から出力される基準電圧を取得するステップと、
前記オフセット電流を流したときに前記地絡電流検出装置から出力される出力電圧を監視するステップと、
前記地絡電流検出装置で検出される電流が実質的にゼロとなった場合に、前記零相変流器に故障のおそれがあると判断するステップと、
を含むことを特徴とする零相変流器の故障検出方法。
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JP2017046544A (ja) * | 2015-08-28 | 2017-03-02 | 京セラ株式会社 | パワーコンディショナ及び電力管理装置 |
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JP6420984B2 (ja) * | 2014-07-08 | 2018-11-07 | 株式会社ダイヘン | パワーコンディショナ、端末装置、および健全性確認方法 |
US10338104B2 (en) | 2015-04-10 | 2019-07-02 | Mitsubishi Electric Corporation | Leakage current detection device for conducting wires |
US10608440B2 (en) | 2016-08-31 | 2020-03-31 | Te Connectivity Corporation | Control circuit configured to determine when a direct current component in an alternating current power line passes a designated threshold |
CN112924838B (zh) * | 2021-01-13 | 2022-03-29 | 南京南瑞继保电气有限公司 | 模块化换流链、合成回路系统、换流阀及控制方法 |
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- 2013-08-29 WO PCT/JP2013/005105 patent/WO2014034117A1/ja active Application Filing
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- 2013-08-29 EP EP13833373.7A patent/EP2892062B1/en active Active
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JP2005065382A (ja) * | 2003-08-08 | 2005-03-10 | Omron Corp | 直流電流検出回路及び直流地絡電流検出回路 |
JP2006187150A (ja) * | 2004-12-28 | 2006-07-13 | Omron Corp | パワーコンディショナおよびその自己診断方法 |
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JP2017046544A (ja) * | 2015-08-28 | 2017-03-02 | 京セラ株式会社 | パワーコンディショナ及び電力管理装置 |
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EP2892062A1 (en) | 2015-07-08 |
CN104603894B (zh) | 2018-09-28 |
EP2892062A4 (en) | 2016-05-04 |
CN104603894A (zh) | 2015-05-06 |
JP6362837B2 (ja) | 2018-07-25 |
US9928955B2 (en) | 2018-03-27 |
US20150228407A1 (en) | 2015-08-13 |
WO2014034117A1 (ja) | 2014-03-06 |
EP2892062B1 (en) | 2021-05-12 |
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