METHOD FOR DISTRIBUTED WAVEFORM RECORDING IN A POWER DISTRIBUTION SYSTEM

摘要

The invention relates to a method and apparatus for distributed waveform recording for the purpose of fault monitoring and analysis of fault condition in a power distribution system. The method includes one or more instrument transformers along with merging units and a plurality of Intelligent Electronic Devices (IEDs) distributed in a plurality of hierarchical levels. The distributed waveform recording corresponding to a fault event at different levels in the power distribution system data is carried out by at least two devices participating to detect an event for recording and performing waveform recording, where the data for waveform recording and detection of event are based on a single stream of the sampled measured value data and thereby are time synchronized.