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公开(公告)号：EP4346040A1
公开(公告)日：2024-04-03
申请号：EP22207618.4
申请日：2022-11-15
申请人： Hitachi Energy Ltd
发明人： NAIDU, OD , KHAN, Yasir Ullah , GEORGE, Neethu , PRADHAN, Vedanta
摘要： The present disclosure relates to a method for controlling a protection system for an electrical power system comprising a transmission line, the method comprising: determining a plurality of phase angle deviations based on network models of the electrical power system during respective faults of at least three faults; determining at least three phase angle ranges based on the plurality of phase angle deviations, wherein a sum of the at least three phase angle ranges is an angle of complete rotation; and controlling the protection system for the electrical power system based on the at least three phase angle ranges.
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公开(公告)号：EP4333229A3
公开(公告)日：2024-03-27
申请号：EP23194772.2
申请日：2023-09-01
发明人： Cox, Benjamin , Bouda, Fabian , Gawlik, Wolfgang
摘要： Die Erfindung bezieht sich unter anderem auf ein Verfahren zum Erkennen eines Doppelerdschlusses in einem Leitungsabschnitt (30) einer dreiphasigen elektrischen Energieübertragungsleitung, wobei bei dem Verfahren Phasenspannungszeiger ( U A,Ph1 - U A,Ph3 ) gebildet werden, und zwar auf der Basis von Phase-Erde-Spannungen, die für die Phasenleiter (31-33) gemessen worden sind, und unter Berücksichtigung der Phasenspannungszeiger auf das Vorliegen oder Nichtvorliegen eines Doppelerdschlusses geschlossen wird. Erfindungsgemäß ist vorgesehen, dass mit den Phasenspannungszeigern ( U A,Ph1 - U A,Ph3 ) nach der Methode der Symmetrischen Komponenten drei Systemzeiger, nämlich ein Mitsystemzeiger (U1), ein Gegensystemzeiger (U2) und ein Nullsystemzeiger (U0), errechnet werden, unter Heranziehung der Systemzeiger ein Auslösezeiger (K) errechnet wird und auf das Vorliegen eines Doppelerdschlusses geschlossen wird, wenn der Betrag (k) des Auslösezeigers (K) ein vorgegebenes Betragskriterium erfüllt und der Zeigerwinkel (α) des Auslösezeigers (K) ein vorgegebenes Winkelkriterium erfüllt.
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公开(公告)号：EP3300542B1
公开(公告)日：2019-08-21
申请号：EP16815624.8
申请日：2016-12-01
申请人： HAGER-ELECTRO SAS
发明人： CHETOUANI, Hichem
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5.发明公开
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公开(公告)号：EP2477293A3
公开(公告)日：2015-12-02
申请号：EP12150984.8
申请日：2012-01-12
CPC分类号： H02H3/34 , H02H3/0935 , H02H3/305 , H02H3/50
摘要： A circuit protection system (100) includes a first current sensing device (102) operative to measure a current of a first phase of a voltage source (151), a second current sensing device (102) operative to measure a current of a second phase of a voltage source (153), and a logic portion (110) communicatively connected to the first current sensing device (102) and the second current sensing device (102), the logic portion (110) operative to receive measured currents from the first current sensing device (102) and the second current sensing device (102), determine whether the measured current of the first phase (151) is less than a threshold current value during a time period, and output an indication that a short exists in the first phase of the voltage source (151) responsive to determining that the measured current of the first phase (151) is not less than the threshold current value during the time period.
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7.发明公开Fault type selection system for identifying faults in an electric power system 审中-公开系统用于在电力供给系统选择用于故障识别的错误类型
公开(公告)号：EP1207610A3
公开(公告)日：2005-12-14
申请号：EP01308792.9
申请日：2001-10-16
摘要： The fault identification system includes a first logic circuit (Fig. 6) which is responsive to conventional protective elements (81A, 81B, 81C) which recognize the presence of low resistance single line-to-ground faults for the A, B and C phases on a power transmission line. The first logic circuit includes a portion thereof for recognizing and providing an output indication of single line-to-ground faults, faults involving two phases and three-phase faults, in response to the occurrence of different combinations of outputs from the protective elements. A calculation circuit (Fig. 7), when enabled, is used to determine the angular difference between the total zero sequence current and the total negative sequence current for high resistance faults when the protective elements themselves cannot identify fault conditions. The angular difference is in one of three pre-selected angular sectors. An angular difference in the first sector indicates an A phase-to-ground fault or a BC phase-to-phase to ground fault; an angular difference in the second sector indicates a B phase-to-ground fault or a C phase-to-phase to ground fault; and a signal in the third sector indicates a C phase-to-ground fault or an AB phase-to-phase to ground fault. A processor is used to determine which of the two possible for each angle determination is the actual fault type. An output indication of the actual fault type is then provided.
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公开(公告)号：EP0592337B2
公开(公告)日：2002-10-02
申请号：EP93420389.4
申请日：1993-09-29
发明人： Del Vecchio, Alain , Ferrazzi, Marc
CPC分类号： H02H3/34 , H02H3/0935
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10.发明公开Déclencheur statique pour un disjoncteur de protection d'un réseau triphase, permettant la détection du type de défaut 失效静态触发器用于三相网络的保护断路器，其允许误差类型的确定。
公开(公告)号：EP0396477A1
公开(公告)日：1990-11-07
申请号：EP90420191.0
申请日：1990-04-13
申请人： MERLIN GERIN
发明人： Fraisse, Didier
IPC分类号： H02H3/34
CPC分类号： H02H3/34
摘要： Le déclencheur statique d'un disjoncteur de protection d'un réseau triphasé comporte un circuit de détection du type de défaut comparant les courants (I1,I2,I3,IN) parcourant les conducteurs du réseau à un premier seuil (S1) et à un second seuil (S2), supérieur au premier. Il fournit un signal (A) représentatif d'un certain type de défaut, monophasé ou deux pôles série, lorsqu'un premier nombre de courants est inférieur au premier seuil (S1) et un second nombre de courants supérieur au second seuil (S2).
摘要翻译： 断路器用于保护三相网络的静态跳闸装置包括所述故障类型比较的电流（I1，I2，I3，IN）沿网络的导体行进到第一阈值（S1）和一个检测电路 与第二阈值（S2）大于第一。 它提供表示某种类型的故障时，单相或二极串联的一个信号（A），当电流的firstNumber小于所述第一阈值（S1）和大于第二阈值电流大的第二数量（ S2）。 ...
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