Distribution network failure sign diagnosis system and method

摘要

A failure sign diagnosis system of an electrical power grid capable of statistically diagnosing a failure sign of an electrical power grid by using measurement data obtained from AMI, and a method thereof are provided. A diagnosis data calculation unit 6 calls a representative value of each diagnosis section from the measurement data storage unit 5 corresponding to the diagnosis section, calculates the value as learning data d1 for creating a subspace, and simultaneously calculates it as diagnosis data d2. Normal subspace calculation unit 7 specifies a diagnosis section c on the basis of a calculation result from a normal operation period calculation unit 8 and a high-load time slot calculation unit 18 and calculates a normal subspace that is considered to be normal from a set of the learning data d1. A failure sign detection unit 13 detects presence of a failure sign of the electrical power grid by comparing the diagnosis data d2 with the normal subspace