JP6195091B2 - 漏洩電流および故障電流の分散型検知、ならびにストリング故障の検知 - Google Patents
漏洩電流および故障電流の分散型検知、ならびにストリング故障の検知 Download PDFInfo
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- G—PHYSICS
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- H—ELECTRICITY
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- H02H3/00—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
- H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
- H02H3/33—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers
- H02H3/337—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors using summation current transformers avoiding disconnection due to reactive fault currents
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- H—ELECTRICITY
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- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
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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
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Description
2 コネクタ
3 光起電力発電機
4 DC/DCコンバータ
5 DC電圧中間回路
6 接地中点値
7 キャパシタ
8 DC/ACコンバータ
9 本線フィルタ
10 本線スイッチ
11 AC送電網
12 差動電流センサ
13 (未使用)
14 入力ライン
15 入力ライン
16 ヒューズ
17 ヒューズ
18 ヒューズ
19 ヒューズ
20 スイッチ
Claims (19)
- 複数の直流発電機のための個別の入力側コネクタ(2)を含むインバータ(1)を重大な故障電流(IR)の発生に関して監視する方法であって、
−入力ライン(14、15)間の差動電流(Idiff)が前記インバータ(1)において測定され、これらの入力ライン(14、15)はそれらの全体において、前記個別のコネクタ(2)に供給されるすべての電流を伝導し、かつ、
−前記差動電流(Idiff)が限度値と比較され、前記限度値が超過される場合にはこれは故障と認識される方法において、
−前記インバータ(1)内の少なくとも2対の入力ライン(14、15)における前記差動電流(Idiff)が別々に測定され、これらの少なくとも2対の入力ライン(14、15)は、異なる入力側コネクタ(2)に供給される前記電流を伝導すること、
−前記差動電流(Idiff)が、各対の入力ライン(14、15)に対して前記限度値と別々に比較されること、
前記限度値が、前記差動電流(Idiff)の抵抗性故障電流部分(IR)の増加に対する限度値であること、および、
−それに加えてすべての対の入力ライン(14、15)において同時に発生する差動電流(Idiff)の合計が決定され、前記合計はもう1つの限度値と比較され、前記もう1つの限度値が超過される場合には、これも同様に故障と認識されること、
を特徴とする方法。 - 各対の入力ライン(14、15)に対して前記差動電流(Idiff)が別々に比較される前記限度値が、特定の期間内の電流の増加に対する限度値であることを特徴とする、請求項1に記載の方法。
- 前記測定された差動電流(Idiff)の前記抵抗性故障電流部分(IR)が、前記測定された差動電流(Idiff)の各々について決定されること、および、前記測定された差動電流(Idiff)の各々が、その抵抗性故障電流部分(IR)の形で前記限度値と比較されることを特徴とする、請求項2に記載の方法。
- すべての対の入力ライン(14、15)において同時に発生する差動電流(Idiff)の前記合計が比較される前記もう1つの限度値が、前記差動電流(Idiff)の容量性漏洩電流部分(IC)の合計に対する限度値であることを特徴とする、請求項1〜3のいずれか一項に記載の方法。
- 前記測定された差動電流(Idiff)の前記容量性漏洩電流部分(IC)が、前記測定された差動電流(Idiff)の各々について決定されること、および、すべての対の前記入力ライン(14、15)において前記同時に発生する差動電流(Idiff)の前記合計が、それらの容量性漏洩電流部分(IC)の前記合計の形で決定され、かつ、前記合計が前記もう1つの限度値と比較されること、を特徴とする、請求項4に記載の方法。
- すべての対の前記入力ライン(14、15)において前記同時に発生する差動電流(Idiff)の前記合計が、前記同時に発生する差動電流(Idiff)の前記合計の容量性漏洩電流部分の形で決定され、かつ、前記合計が、前記もう1つの限度値と比較されることを特徴とする、請求項4に記載の方法。
- 各対の入力ライン(14、15)が、少なくとも2つの直流発電機に対する前記コネクタ(2)に供給される前記電流を伝導することを特徴とする、請求項1〜6のいずれか一項に記載の方法。
- 故障が認識される場合に前記インバータ(1)のスイッチが切られ、かつ/または、インバーター(1)の出力側で接続されるAC送電網(11)から切断されることを特徴とする、請求項1〜7のいずれか一項に記載の方法。
- 故障が1対だけの入力ライン(14、15)で認識されている場合に、これらの入力ライン(14、15)が選択的に切断されるか、または、これらの入力ライン(14、15)に割り当てられたコネクタ(2)のスイッチが選択的に切られることを特徴とする、請求項1〜8のいずれか一項に記載の方法。
- 1対の入力ライン(14、15)において前記差動電流(Idiff)の低下が、それに接続される直流発電機の故障の徴候として判定されることを特徴とする、請求項1〜9のいずれか一項に記載の方法。
- さらに、前記少なくとも2対の入力ライン(14、15)において同時に発生する差動電流(Idiff)が、互いと比較されることを特徴とする、請求項1〜10のいずれか一項に記載の方法。
- さらに、前記少なくとも2対の入力ライン(14、15)における差動電流(Idiff)の長期的な特性が判定されることを特徴とする、請求項11に記載の方法。
- −複数の直流発電機に対する個別の入力側コネクタ(2)、
−入力ライン全体においてコネクタ(2)に供給されるすべての電流を伝導する入力ライン(14、15)間の前記差動電流(Idiff)を測定する測定器、および、
前記差動電流(Idiff)を限度値と比較し、前記限度値を超過する場合にはこれを故障と認識する監視装置、
を有する、請求項1〜12のいずれか一項に記載の方法を実行するためのインバータ(1)において、
−前記測定器が、少なくとも2対の入力ライン(14、15)の各々に対して個別の差動電流センサ(12)を含み、これらの少なくとも2対の入力ライン(14、15)は、異なる入力側コネクタ(2)に供給される前記電流を伝導することと、
−前記監視装置が、前記差動電流センサ(12)の各々によって測定される前記差動電流(Idiff)を、別々に前記限度値と比較することと、
前記限度値が、前記差動電流(Idiff)の抵抗性故障電流部分(IR)の増加に対する限度値であること、
−前記監視装置が、すべての差動電流センサ(12)によって同時に測定される前記差動電流(Idiff)の合計をさらに決定し、かつ、前記合計をもう1つの限度値と比較し、かつ、前記もう1つの限度値が超過される場合には、これも同様に故障と認識することと、
を特徴とするインバータ(1)。 - 前記監視装置が、前記差動電流センサ(12)の1つによって測定される前記差動電流(Idiff)の各々に対する、前記測定された差動電流(Idiff)の抵抗性故障電流部分(IR)を決定することを特徴とする、請求項13に記載のインバータ。
- 前記監視装置が、前記測定された差動電流(Idiff)の各々をその抵抗性故障電流部分(IR)の形で、前記限度値と比較することを特徴とする、請求項14に記載のインバータ。
- 前記監視装置が、前記差動電流センサ(12)の1つによって測定される前記差動電流(Idiff)の各々に対して、前記測定された差動電流(Idiff)の容量性漏洩電流部分(IC)を決定することを特徴とする、請求項13〜15のいずれか一項に記載のインバータ。
- 前記監視装置が、すべての対の入力ライン(14、15)において前記同時に発生する差動電流(Idiff)の前記合計を、それらの容量性漏洩電流部分(IC)の合計の形で決定し、かつ、前記合計を前記もう1つの限度値と比較することを特徴とする、請求項16に記載のインバータ。
- 前記監視装置が、すべての対の入力ライン(14、15)において、前記同時に発生する差動電流(Idiff)の前記合計を、前記同時に発生する差動電流(Idiff)の前記合計の容量性漏洩電流部分の形で決定し、かつ、前記合計を前記もう1つの限度値と比較することを特徴とする、請求項13〜15のいずれか一項に記載のインバータ。
- 各対の入力ライン(14、15)が、少なくとも2つの直流発電機に対する前記コネクタ(2)に供給される前記電流を伝導することを特徴とする、請求項13〜18のいずれか一項に記載のインバータ。
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DE102012107126.8 | 2012-08-03 | ||
DE102012107126 | 2012-08-03 | ||
PCT/EP2013/065182 WO2014019864A1 (de) | 2012-08-03 | 2013-07-18 | Verteilte ableit- und fehlerstromerfassung sowie stringfehlererkennung |
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JP (1) | JP6195091B2 (ja) |
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US20150288188A1 (en) * | 2014-04-08 | 2015-10-08 | Marvin S Keshner | Parallel-Connected Solar Electric System |
KR101803132B1 (ko) * | 2014-04-28 | 2017-11-29 | 엘에스산전 주식회사 | 무 변압기형 태양광 인버터의 누설전류 감시 장치 |
IT201700032303A1 (it) * | 2017-03-23 | 2018-09-23 | St Microelectronics Srl | Procedimento di funzionamento di generatori fotovoltaici, circuito, dispositivo e sistema corrispondenti |
JP7204450B2 (ja) * | 2018-11-29 | 2023-01-16 | 株式会社Nttファシリティーズ | 絶縁抵抗試験システム及び絶縁抵抗試験方法 |
DE102020115757A1 (de) | 2020-06-15 | 2021-12-16 | Sma Solar Technology Ag | Vorrichtung und verfahren zur detektion eines fehlerstroms in einer photovoltaik-anlage, sowie photovoltaik-wechselrichter mit der vorrichtung |
CN111934280B (zh) * | 2020-09-09 | 2023-01-24 | 南方电网数字电网研究院有限公司 | 漏电故障检测方法、装置、存储介质和配电网关 |
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JP2874156B2 (ja) * | 1994-04-13 | 1999-03-24 | キヤノン株式会社 | 発電システム |
JPH09285015A (ja) * | 1996-04-08 | 1997-10-31 | Sanyo Electric Co Ltd | 太陽光発電システムの直流地絡検出装置 |
JP2002233045A (ja) | 2001-02-02 | 2002-08-16 | Canon Inc | 太陽光発電システムの地絡検出のための装置及び方法 |
US7768751B2 (en) * | 2008-01-29 | 2010-08-03 | Advanced Energy Industries, Inc. | System and method for ground fault detection and interruption |
JP2010114150A (ja) | 2008-11-04 | 2010-05-20 | Sharp Corp | 太陽光発電システム |
EP2293089A1 (de) | 2009-09-02 | 2011-03-09 | SMA Solar Technology AG | Stringausfallüberwachung |
US8335062B2 (en) * | 2010-03-08 | 2012-12-18 | Pass & Seymour, Inc. | Protective device for an electrical supply facility |
ES2565005T3 (es) * | 2010-03-31 | 2016-03-30 | Sma Solar Technology Ag | Determinación de la parte de corriente de falta de una corriente diferencial |
DE102010036816A1 (de) | 2010-08-03 | 2012-02-09 | Newtos Ag | Verfahren und Vorrichtung zur Überwachung und Steuerung einer Photovoltaik-Anlage |
US8659858B2 (en) * | 2010-08-24 | 2014-02-25 | Sanyo Electric Co., Ltd. | Ground-fault detecting device, current collecting box using the ground-fault detecting device, and photovoltaic power generating device using the current collecting box |
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US20150137850A1 (en) | 2015-05-21 |
EP2880454B1 (de) | 2021-06-30 |
US9594126B2 (en) | 2017-03-14 |
WO2014019864A1 (de) | 2014-02-06 |
DE112013003857A5 (de) | 2015-04-23 |
CN104704378B (zh) | 2017-09-19 |
JP2015531859A (ja) | 2015-11-05 |
EP2880454A1 (de) | 2015-06-10 |
CN104704378A (zh) | 2015-06-10 |
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