Method for testing humidity of high-voltage switch assembly on line

The invention relates to the technical field of power electronics, in particular to a method for testing humidity of a high-voltage switch assembly on line, comprising a humidity sensing module, a primary processing circuit, two groups of double-core shielded twisted pairs, a secondary processing circuit, an isolation processing circuit and a data collector which are connected in sequence, pre-stage processing circuits of a humidity sensor and a humidity sensor are arranged in a high-voltage-resistant insulating sheath, so that the high-voltage insulation problem of the humidity sensor working in a high-voltage environment is solved, a voltage signal reflecting humidity is converted into a current signal, and the current signal is transmitted to the humidity sensor. The problem of long-distance transmission is solved, and the anti-interference capability of the humidity measurement system working in a strong electromagnetic environment is enhanced by arranging a multi-stage filter circuit, so that the scheme