Rotary electric machine managing system
A rotary electric machine managing system of an embodiment has an image data generating unit configured in such a way as to generate image data which indicates past breakdown voltage-related information related to a breakdown voltage of the past, present breakdown voltage-related information related to a breakdown voltage of the present, and future breakdown voltage-related information related to a breakdown voltage of the future as breakdown voltage-related information. The past breakdown voltage-related information is information found based on a partial discharge signal obtained from a rotary electric machine at a time of operation in the rotary electric machine of the past. The present breakdown voltage-related information is information found based on a partial discharge signal obtained from the rotary electric machine at a time of operation in the rotary electric machine of the present.
1 . A rotary electric machine managing system which manages breakdown voltage-related information related to a breakdown voltage of an insulating member, for a rotary electric machine that has a rotor and a stator in which a stator coil is housed in a stator slot formed in a stator core via the insulating member, the rotary electric machine managing system including: a processor and a storage, wherein
the processor is configured in such a way as to generate image data which indicates past breakdown voltage-related information related to the breakdown voltage of the past, present breakdown voltage-related information related to the breakdown voltage of the present, and future breakdown voltage-related information related to the breakdown voltage of the future as the breakdown voltage-related information, wherein
a property related to the breakdown voltage of the past is found based on a partial discharge signal obtained from the rotary electric machine of the past at a time of operation, and the past breakdown voltage-related information is a past approximated curve found from the property related to the breakdown voltage of the past;
the present breakdown voltage-related information is information found based on a partial discharge signal obtained from the rotary electric machine of the present at a time of operation;
the future breakdown voltage-related information is information found based on operation plan information related to an operation plan under which an operation is performed in the rotary electric machine of the future, and is information indicating a decreasing transition from the past approximated curve;
the operation plan information is information related to a power value output by the rotary electric machine; and
the processor is configured to update the image data indicating the future breakdown voltage-related information every time the operation plan information is updated.
2 . The rotary electric machine managing system according to claim 1 , wherein
the processor is configured to generate the image data in such a way as to indicate the past breakdown voltage-related information, the present breakdown voltage-related information, and the future breakdown voltage-related information along a time axis of usage of the rotary electric machine.
3 . The rotary electric machine managing system according to claim 1 , wherein
the operation plan information is information which is input by a manipulation using a user interface screen.
4 . The rotary electric machine managing system according to claim 1 , wherein
the processor is configured to generate the image data in such a way as to appose first future breakdown voltage-related information found as the future breakdown voltage-related information when first operation plan information is input as the operation plan information and second future breakdown voltage-related information found as the future breakdown voltage-related information when second operation plan information that is different from the first operation plan information is input as the operation plan information.
5 . The rotary electric machine managing system according to claim 1 , wherein
the processor is configured to generate the image data in such a way as to indicate the past breakdown voltage-related information every predetermined time interval.
6 . The rotary electric machine managing system according to claim 1 , wherein
the image data is generated in such a way as to indicate breakdown voltage lower limit value information related to a lower limit value which is set for a property related to the breakdown voltage.
7 . The rotary electric machine managing system according to claim 6 , wherein
the image data is generated in such a way as to indicate remaining life-related information related to a time when the property related to the breakdown voltage is estimated to reach the lower limit value from the present.
8 . The rotary electric machine managing system according to claim 7 , wherein
the processor is configured to generate the image data in such a way as to indicate a time point before a remaining life estimated reach time point when the property related to the breakdown voltage is estimated to reach the lower limit value from the present as preparation period information for preparing a spare part used for updating the rotary electric machine.
9 . The rotary electric machine managing system according to claim 1 , wherein
the image data is generated in such a way as to indicate the past approximated curve found from the property related to the breakdown voltage of the past, an upper limit side prediction interval curve indicating an upper limit side of a prediction interval of the approximated curve, and a lower limit side prediction interval curve indicating a lower limit side of the prediction interval of the approximated curve.
10 . The rotary electric machine managing system according to claim 9 , wherein
the processor is configured to generate the image data in such a way as to indicate alarm information warning that a property related to the breakdown voltage of the present which is included in the present breakdown voltage-related information is out of the prediction interval.
11 . The rotary electric machine managing system according to claim 1 , wherein
the processor is configured in such a way as to find the past breakdown voltage-related information, the present breakdown voltage information, and the future breakdown voltage information by an arithmetic operation,
the storage stores a relationship between a breakdown electric field of the insulating member and a maximum partial discharge magnitude measured in the rotary electric machine as relational data in advance,
the processor is configured to find the maximum partial discharge magnitude by analyzing a partial discharge signal actually obtained from the rotary electric machine at a time of operation of the rotary electric machine, and outputs the maximum partial discharge magnitude as maximum partial discharge magnitude data,
the processor is configured to find the breakdown electric field corresponding to the maximum partial discharge magnitude data that the processor outputs based on the relational data that the storage stores, and outputs the breakdown electric field as breakdown electric field data,
the storage stores the breakdown electric field data that the processor outputs, in association with acquisition time point data related to a time point when the partial discharge signal is acquired, and
the processor is configured to find the past breakdown voltage-related information and the present breakdown voltage-related information based on the breakdown electric field data stored in association with the acquisition time point data in the storage.
12 . The rotary electric machine managing system according to claim 11 , wherein
the storage stores a breakdown voltage reduction coefficient indicating a percentage of reduction of the breakdown voltage in response to operating condition information related to an operating condition of the rotary electric machine as breakdown voltage reduction coefficient data; and
the processor is configured to output a breakdown voltage reduction magnitude of reduction of the breakdown voltage by operation plan information related to an operation plan under which an operation is performed in the rotary electric machine of the future, based on the breakdown voltage reduction coefficient data that the storage stores as breakdown voltage reduction magnitude data; and wherein
the processor is configured to find the future breakdown voltage-related information based on the breakdown voltage reduction magnitude data that the processor outputs.