Abstract
In order to solve the limitations of the “pre-set, real-time action, and regular check” working mode of traditional relay protection in offshore oil field platform grids, an online verification method of relay protection settings based on ETAP software was proposed. The real-time operating status of the current power system is obtained through the EMS system, then short-circuit calculation of various faults performed automatically under the current operation mode. The protection cooperation analysis module of ETAP software is used to realize the real-time online verification of relay protection settings. According to the matching principle of the time-current characteristic (TCC) curve, the TCC curve is graphically adjusted to meet the current protection cooperation requirements. Finally, the validity of the method is verified by engineering example simulation of a platform grid in the Bohai Sea.
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