JP4215656B2 - 地絡事故検出装置及び地絡事故検出方法 - Google Patents
地絡事故検出装置及び地絡事故検出方法 Download PDFInfo
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- JP4215656B2 JP4215656B2 JP2004030292A JP2004030292A JP4215656B2 JP 4215656 B2 JP4215656 B2 JP 4215656B2 JP 2004030292 A JP2004030292 A JP 2004030292A JP 2004030292 A JP2004030292 A JP 2004030292A JP 4215656 B2 JP4215656 B2 JP 4215656B2
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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Description
Claims (7)
- 3以上の普通接続部を有し前記普通接続部により導体と金属遮蔽層とがそれぞれ接続され、地中に敷設されるとともに、前記普通接続部の金属遮蔽層が大地に接地されたケーブルを用いて、三相交流電力の供給がなされる、抵抗接地系の送配電系統向けの地絡事故検出装置であって、
前記普通接続部における、金属遮蔽層と、大地と、の間を流れる3の電流IA,IB,ICを測定して出力する電流計測手段と、
予め定められた地絡電流基準値Isetを入力して記憶する基準値保存手段と、
前記3の電流IA,IB,ICを入力し、これらのうち2の電流間の差である3の絶対値|IA−IB|,|IB−IC|,|IC−IA|を求めてそれぞれ出力する絶対値演算手段と、
前記地絡電流基準値Isetを取り出し、前記3の絶対値|IA−IB|,|IB−IC|,|IC−IA|をそれぞれ入力して、前記地絡電流基準値Isetと前記3の絶対値|IA−IB|,|IB−IC|,|IC−IA|の各々とを比較し、等しいか又は前記3の絶対値|IA−IB|,|IB−IC|,|IC−IA|の各々が地絡電流基準値Isetより大きいときに、オン信号をそれぞれ出力する3の比較演算手段と、
前記3の比較演算手段の出力を入力してそれらの論理和をとって出力する論理和演算手段と、
を有する地絡事故検出装置。 - 請求項1に記載の地絡事故検出装置であって、
前記論理和演算手段の後に、論理和演算手段の出力を入力し、そのうちオン信号をうけて作動するオンディレイタイマ手段を有する地絡事故検出装置。 - 請求項1に記載の地絡事故検出装置であって、
前記論理和演算手段の代わりに、3の比較演算手段の出力のうち2の出力はそのまま入力し1の出力は否定をとって入力して、それらの論理積をとって出力する3の論理積演算手段を有する地絡事故検出装置。 - 請求項3に記載の地絡事故検出装置であって、
前記3の論理積演算手段のそれぞれの後に、それぞれの論理積演算手段の出力を入力し、そのうちオン信号をうけて作動する3のオンディレイタイマ手段を有する地絡事故検出装置。 - 請求項1に記載の地絡事故検出装置であって、
前記三相交流電力の供給が1回線でなされ、
前記3の電流IA,IB,ICが、前記三相交流電力のa相、b相、c相を担うそれぞれのケーブルの前記金属遮蔽層と大地との間を流れる電流Ia,Ib,Icである地絡事故検出装置。 - 請求項1に記載の地絡事故検出装置であって、
前記三相交流電力の供給が3回線でなされ、
前記3の電流IA,IB,ICが、前記3回線のそれぞれの回線において、三相交流電力のa相、b相、c相を担うケーブルの金属遮蔽層と大地との間を流れる電流の合成和I1,I2,I3である地絡事故検出装置。 - 請求項1又は6に記載の地絡事故検出装置であって、
前記三相交流電力の電圧が33kV以下であり前記三相交流電力の供給がスポットネットワーク方式で行われる送配電系統向けの地絡事故検出装置。
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JP2004030292A JP4215656B2 (ja) | 2004-02-06 | 2004-02-06 | 地絡事故検出装置及び地絡事故検出方法 |
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JP2005221404A JP2005221404A (ja) | 2005-08-18 |
JP4215656B2 true JP4215656B2 (ja) | 2009-01-28 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2733498A2 (en) | 2012-11-15 | 2014-05-21 | Schneider Electric Industries SAS | Method and device for detecting directional grounding fault based on three phase current variation |
Families Citing this family (4)
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KR101077768B1 (ko) | 2010-04-30 | 2011-10-27 | 엘에스산전 주식회사 | 전력계통의 이상 전류 감시 장치 |
CN106093714A (zh) * | 2016-08-26 | 2016-11-09 | 淄博博鸿电气有限公司 | 小电流接地系统单相接地故障线路的选线方法 |
US11280824B2 (en) | 2017-12-20 | 2022-03-22 | Hitachi Energy Switzerland Ag | High sensitive phase selection method |
KR102138360B1 (ko) * | 2019-04-11 | 2020-07-27 | 엘에스일렉트릭(주) | 출력지락 검출이 가능한 인버터 시스템과 이를 이용한 출력지락 검출 방법 |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2733498A2 (en) | 2012-11-15 | 2014-05-21 | Schneider Electric Industries SAS | Method and device for detecting directional grounding fault based on three phase current variation |
CN103809070A (zh) * | 2012-11-15 | 2014-05-21 | 施耐德电器工业公司 | 基于三相电流变化进行的方向接地故障检测方法和装置 |
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