| 摘要 |
A method for identifying one or more simultaneously occurring partial discharge sources from partial discharge measurement signals from an electrical apparatus to which an AC voltage is applied. A method according to the invention for identifying one or more simultaneously occurring partial discharge sources from partial discharge measurement signals from an electrical apparatus to which an AC voltage is applied, particularly a gas-insulated installation, a high-voltage generator, a transformer, an electrical high-voltage line or an electrical cable, comprises the following steps: on the basis of a frequency matrix into which measured partial discharge pulses are entered as partial discharge pulse matrix arrays according to detected pulse amplitude and according to detected phase and in which partial discharge pulse matrix arrays are associated with at least one enclosed area of partial discharge pulse matrix arrays, area parameters for the at least one enclosed area of partial discharge pulse matrix arrays are determined; for each enclosed area of partial discharge pulse matrix arrays, area parameters for the enclosed area of partial discharge pulse matrix arrays are compared with prescribed rule sets, with each rule set corresponding to a characteristic partial discharge pulse area basic form, and, for each enclosed area of partial discharge pulse matrix arrays, that rule set which best corresponds to the enclosed area is associated with the enclosed area, so that every enclosed area of partial discharge pulse matrix arrays is assigned a partial discharge pulse area basic form; prescribed error rules, which associate characteristic partial discharge pulse area basic forms and characteristic combinations of partial discharge pulse area basic forms with known partial discharge sources, are applied to the ascertained partial discharge pulse area basic forms in order to determine those partial discharge sources which have output the corresponding partial discharge pulses. |
