- 专利标题: PROTECTION METHOD FOR PROTECTING A GENERATOR OR POWER STATION UNIT AND PROTECTIVE DEVICE FOR CARRYING OUT SUCH A METHOD
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申请号: US15678526申请日: 2017-08-16
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公开(公告)号: US20180054051A1公开(公告)日: 2018-02-22
- 发明人: HANS-JOACHIM HERRMANN , KAI TRUNK , EDMUND EISENBURGER
- 申请人: SIEMENS AKTIENGESELLSCHAFT
- 优先权: EP16184321.4 20160816
- 主分类号: H02H3/16
- IPC分类号: H02H3/16 ; H02H1/00 ; H02H7/06 ; H02H3/027
摘要:
A method protects an electrical generator or power station unit connected to a power distribution network or to a power transmission line. A short circuit near the generator in the power distribution network or on the power transmission line is detected, and a short-circuit detection signal is generated, when a set of predetermined trigger conditions is satisfied. The electrical generator is disconnected from the network or line if, after generation of the short-circuit detection signal, the trigger conditions are satisfied at the instant when a predetermined delay time elapses, and have remained satisfied until the predetermined delay time elapses. The delay time is a variable duration which is reestablished regularly or irregularly before it elapses, as a function of the operating profile after the short-circuit occurrence, and the generator is disconnected if the trigger conditions are satisfied at the instant when the delay time elapses.