US 12,066,498 B2
Method for identifying at least one diagnosis variable, measuring device and measuring system
Wiebke Froehner, Amberg (DE); Ivana Mladenovic, Seukendorf (DE); and Thomas Werner, Rednitzhembach (DE)
Assigned to Siemens Aktiengesellschaft, Munich (DE)
Filed by SIEMENS AKTIENGESELLSCHAFT, Munich (DE)
Filed on Apr. 11, 2018, as Appl. No. 15/950,423.
Claims priority of application No. 17165889 (EP), filed on Apr. 11, 2017.
Prior Publication US 2018/0292442 A1, Oct. 11, 2018
Int. Cl. G01R 31/50 (2020.01); G01R 25/00 (2006.01); G01R 27/04 (2006.01); G01R 27/26 (2006.01); G01R 31/58 (2020.01)
CPC G01R 31/50 (2020.01) [G01R 25/005 (2013.01); G01R 27/26 (2013.01); G01R 31/58 (2020.01); G01R 27/04 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for identifying at least one diagnosis variable indicating an aging state of an operating device in an electrical energy supply network, which comprises the steps of:
detecting first measurement values of at least one measurement variable at a first measuring point of the operating device by means of a first measuring device;
detecting second measurement values of the at least one measurement variable at a second measuring point of the operating device by means of a second measuring device, wherein the first and the second measuring point of the operating device are disposed at a physical distance from one another, the first and second measurement values being detected in a time-controlled manner such that a signal of the at least one measurement variable is sampled at a prescribed sampling rate at set times and over a set measurement duration so as to generate time profiles of the first and second measurement values, wherein stipulated times and measurement durations for detecting the measurement values of the first and the second measurement points are stipulated in terms of time such that the measurement values are detected simultaneously in the time-controlled manner at least over an overlap time range in the first and second measuring devices; and
storing the time profiles of the first and second measurement values and, by subsequent synchronization, respective simultaneously detected measurement value pairs of the at least one measurement variable are identified from the time profiles;
forming in each case a first time derivative from the time profiles of the first and second measurement values for the subsequent synchronization, a maximum and an associated time at which the maximum occurs in a respective profile are identified in each profile of derived measurement values, and the measurement values that have been detected at a time of the maximum are used as the simultaneously detected measurement value pair; and
identifying the at least one diagnosis variable using respective simultaneously detected said first and second measurement values.