{'fraction_non_alphanumeric': 0.0136, 'fraction_numerical': 0.0, 'mean_word_length': 5.255, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Coordinated Fault Recording Scheme of μMPMU in Distribution Network Based on Blockchain

The application of μMPMU in the fault diagnosis of distribution network is increasingly widespread. In addition to the waveform data of the μMPMUs near the fault point, some existing fault diagnosis algorithms require the waveform of μMPMU at other locations. However, the μMPMU measurement signal far from the fault location may not reach the trigger recording condition. Aiming at the difficulty of cooperative fault recording of μMPMU, this paper proposes a new collaborative trigger recording scheme based on blockchain. In this scheme, every μMPMU acts as a node and a blockchain network is constructed. The smart contract is used to stipulate the rule of coordinated trigger recording. The μMPMUs that spontaneously start the recording inform others to perform coordinated fault recording, and the waveform data are stored in a blockchain structure for the master station summoning. In this paper, the pros and cons of the blockchain-based scheme and the existing master station based coordinated fault recording scheme are analyzed, which provides a new research approach for the coordinated start-up of μMPMU fault recording in the distribution network.