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公开(公告)号：EP0453057A2
公开(公告)日：1991-10-23
申请号：EP91201780.3
申请日：1987-09-15
发明人： Hampson, John Thomas
IPC分类号： H02H3/44
摘要： It is desirable to provide remote digital protection of distribution transformers. A protection system is disclosed which is able to detect increases in positive sequence current and to detect increases in negative sequence current resulting from unbalanced disturbance on a distribution cable feeding a transformer. The triggering of a circuit breaker (19) is then initiated to isolate the supply cable (10) in response to a detected increase in negative sequence current only if there is a simultaneous detected increase in the positive sequence current in excess of a respective threshold increase.
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公开(公告)号：EP0455314A3
公开(公告)日：1992-01-08
申请号：EP91201778.7
申请日：1987-09-15
发明人： Hampson, John Thomas
摘要： It is desirable to provide remote digital protection of distribution transformers. A protection system is disclosed which is able to detect increases in transient D.C. current flowing in the respective phases of a distribution cable (10) feeding a transformer and also to detect increases in other selected functions of supply parameters for identifying and quantifying a fault current flowing in the distribution cable (10). Increases in these other functions are analysed to identify whether the increases indicate a fault current. Any such fault current can then be quantified and the triggering of a circuit breaker (19) initiated to isolate the supply cable on identifying a fault current. The circuit breaker (19) is not triggered for any increases in the other functions for as long as there is a detected increase in D.C. current in any phase.
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公开(公告)号：EP0453056A2
公开(公告)日：1991-10-23
申请号：EP91201779.5
申请日：1987-09-15
发明人： Hampson, John Thomas
IPC分类号： H02H3/44
摘要： It is desirable to provide remote digital protection of distribution transformers. A protection system is disclosed which is able to measure parameters of a supply to a distribution cable (10) to a distribution transformer to provide time related values for the positive sequence current, voltage and phase angle. Time related values for the susceptance of the distribution cable (10) and load connected thereto can then be calculated, and monitored to detect increases in negative susceptance. The triggering of a circuit breaker (19) is then initiated to isolate the distributor cable (10) if the increase exceeds a predetermined thershold increase.
摘要翻译： 希望提供配电变压器的远程数字保护。 公开了一种能够测量配电电缆（10）到配电变压器的电源参数以提供正序电流，电压和相位角的时间相关值的保护系统。 然后可以计算分配电缆（10）的电纳和与其连接的负载的时间相关值，并且监测以检测负电纳的增加。 然后启动断路器（19）的触发，以便在增加量超过预定增加值时隔离分配器电缆（10）。
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5.发明授权Remote protection of three phase distribution transformers 失效距离保护Dreiphasenverteiltransformatoren的。
公开(公告)号：EP0453057B1
公开(公告)日：1993-12-08
申请号：EP91201780.3
申请日：1987-09-15
发明人： Hampson, John Thomas
IPC分类号： H02H3/44
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6.发明授权Remote protection of three phase distribution transformers 失效距离保护Dreiphasenverteiltransformatoren的。
公开(公告)号：EP0453056B1
公开(公告)日：1994-11-30
申请号：EP91201779.5
申请日：1987-09-15
发明人： Hampson, John Thomas
IPC分类号： H02H3/44
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公开(公告)号：EP0453056A3
公开(公告)日：1992-01-02
申请号：EP91201779.5
申请日：1987-09-15
发明人： Hampson, John Thomas
IPC分类号： H02H3/44
摘要： It is desirable to provide remote digital protection of distribution transformers. A protection system is disclosed which is able to measure parameters of a supply to a distribution cable (10) to a distribution transformer to provide time related values for the positive sequence current, voltage and phase angle. Time related values for the susceptance of the distribution cable (10) and load connected thereto can then be calculated, and monitored to detect increases in negative susceptance. The triggering of a circuit breaker (19) is then initiated to isolate the distributor cable (10) if the increase exceeds a predetermined thershold increase.
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公开(公告)号：EP0453057A3
公开(公告)日：1992-01-08
申请号：EP91201780.3
申请日：1987-09-15
发明人： Hampson, John Thomas
IPC分类号： H02H3/44
摘要： It is desirable to provide remote digital protection of distribution transformers. A protection system is disclosed which is able to detect increases in positive sequence current and to detect increases in negative sequence current resulting from unbalanced disturbance on a distribution cable feeding a transformer. The triggering of a circuit breaker (19) is then initiated to isolate the supply cable (10) in response to a detected increase in negative sequence current only if there is a simultaneous detected increase in the positive sequence current in excess of a respective threshold increase.
摘要翻译： 希望提供配电变压器的远程数字保护。 公开了一种保护系统，其能够检测正序电流的增加并且检测由馈送变压器的配电电缆上的不平衡干扰导致的负序电流的增加。 只有当同时检测到的正序电流增加超过相应的阈值增加时，响应于检测到的负序电流的增加才触发断路器（19）以隔离供电电缆（10） 。
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公开(公告)号：EP0455314A2
公开(公告)日：1991-11-06
申请号：EP91201778.7
申请日：1987-09-15
发明人： Hampson, John Thomas
摘要： It is desirable to provide remote digital protection of distribution transformers. A protection system is disclosed which is able to detect increases in transient D.C. current flowing in the respective phases of a distribution cable (10) feeding a transformer and also to detect increases in other selected functions of supply parameters for identifying and quantifying a fault current flowing in the distribution cable (10). Increases in these other functions are analysed to identify whether the increases indicate a fault current. Any such fault current can then be quantified and the triggering of a circuit breaker (19) initiated to isolate the supply cable on identifying a fault current. The circuit breaker (19) is not triggered for any increases in the other functions for as long as there is a detected increase in D.C. current in any phase.
摘要翻译： 希望提供配电变压器的远程数字保护。 公开了一种保护系统，其能够检测在向变压器供电的配电电缆（10）的相应相中流动的瞬态DC电流的增加，并且还检测用于识别和量化故障电流流动的供电参数的其他所选功能的增加 在配线电缆（10）中。 对这些其他功能的增加进行分析，以确定增加是否指示故障电流。 然后可以量化任何这样的故障电流，并触发断路器（19），以在识别故障电流时隔离电源电缆。 只要检测到任何相的直流电流增加，断路器（19）就不会触发其他功能的增加。
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