Method, arrangement and computer program product for a condition-based calculation of a maintenance date of a technical installation

Patent metadata

Field	Value
Publication number	US-10839356-B2
Application number	US-201415328990-A
Country	US
Kind code	B2
Filing date	Jul 25, 2014
Priority date	Jul 25, 2014
Publication date	Nov 17, 2020
Grant date	Nov 17, 2020

Abstract

The condition of a technical installation is automatically monitored. A measured value of at least one component of the installation is sensed by at least one sensor device on the installation, and the at least one measured value is used, in a data processing arrangement specific to the installation, for determining a current operating state of the installation. By way of the data processing arrangement, including component-specific aging functions, a future chronological course of the operating condition is determined from the current operating condition, and a maintenance interval for the installation is adjusted on the basis of the future chronological course of the operating condition, in order to determine a next maintenance date of the installation. A corresponding arrangement and a computer program product for condition monitoring are also described.

First claim

The invention claimed is:

1. A method for an automatic condition monitoring of a technical installation, the method comprising:
recording, with at least one sensor device at the installation, at least one measured value of at least one component of the installation and using the at least one measured value in a data-processing arrangement, in each case specifically for the installation, for determining a current operating condition of the installation;
determining, with a data processing arrangement, the current operating condition of the technical installation from a plurality of partial operating conditions, wherein individual components of the installation are each allocated to the individual partial operating conditions, and wherein the data processing arrangement brings together each of the individual partial operating conditions in a weighted manner to determine the current operating condition;
determining, with the data processing arrangement, a future chronological course of the operating condition, making use of component-specific ageing functions, on a basis of the current operating condition;
adjusting, with the data processing arrangement, a maintenance interval for the installation on a basis of the future chronological course of the operating condition, in order to specify a next maintenance date of the installation;
wherein the installation is a transformer, a gas-insulated switchgear, or an air-insulated switchgear.

2. The method according to claim 1 , which comprises continuously updating a specification of the next maintenance date based on the at least one recorded measured value.

3. The method according to claim 1 , wherein the adjusting step comprises:
adjusting a prespecified maintenance interval respectively for a subsequent point in time with a specified time interval from a current date, taking into account the operating condition at a subsequent point in time known from the future chronological course of the operating condition, wherein the maintenance interval determined until the subsequent point in time is a predetermined maintenance interval for a next subsequent point in time, until the maintenance interval has become so short that it coincides with a subsequent point in time or comes to lie before the subsequent point in time.

4. The method according to claim 1 , which comprises determining a weighting of an individual partial operating condition on a basis of a known total fault rate for the type of the installation, by determining a relative proportion that the allocated components have in a total fault rate for the allocated components.

5. The method according to claim 4 , which comprises:
allocating each recorded measured value of a component to an individual partial operating condition;
including each measured value in a determination of the allocated individual partial operating condition with a relative proportion in the allocated partial operating condition, by determining, for the allocated component, a relative proportion that the allocated component has in the fault rate of all the components of the individual partial operating condition.

6. The method according to claim 1 , which comprises establishing which partial operating conditions correlate, and forming a quotient for each two correlating partial operating conditions, and, when the quotient falls below a lower threshold value or exceeds an upper threshold value, issuing a warning message, so that a maintenance date can be brought forward.

7. The method according to claim 1 , which comprises determining a chronological course of a failure probability of the installation on a basis of the chronological course of the operating condition, and thereby taking into account a known chronological course of the failure probability of a type of the installation.

8. The method according to claim 7 , which comprises determining a chronological course of a risk of failure from the chronological course of the failure probability of the installation, taking into account the consequences of a failure of the installation.

9. The method according to claim 8 , wherein the consequences of the failure of the installation include costs of the failure that depend on a type of the installation and a location of the installation.

10. The method according to claim 9 , which further comprises taking into account an installation performance and/or an availability of spare parts in a calculation of the failure risk.

11. The method according to claim 8 , which further comprises taking into account an installation performance and/or an availability of spare parts in a calculation of the failure risk.

12. The method according to claim 1 , which comprises determining a point in time for an exchange or repair of the installation by calculating a chronological course of the discounted new price of the installation and determining a minimum of the chronological course of a total of a failure risk and a discounted new price.

13. The method according to claim 1 , which comprises monitoring a multiplicity of installations and in each case determining average values and/or histograms of the operating condition and/or of the failure probability and/or of the failure risk of the multiplicity of installations and of the respective chronological course.

14. A computer program product, comprising: a non-transitory computer-readable medium storing a computer-readable program code configured to cause a computer, forming a data-processing arrangement, and/or a cloud-based data processing arrangement to carry out the method according to claim 1 when the computer program product is executed on the computer and/or on the cloud-based data-processing arrangement.

15. The method according to claim 1 , which comprises: performing maintenance on the installation based on the next maintenance date specified by the future chronological course of the operating condition.

16. An arrangement for an automatic condition monitoring of an electrical installation, the arrangement comprising:
at least one sensor device disposed at the electrical installation and configured to acquire at least one measured value of at least one component of the installation; and
a data processing arrangement connected to receive from said at least one sensor device the at least one measured value and configured to use, in each case specifically for the installation, the at least one measured value for determining a current operating condition of the installation;
said data processing arrangement being configured to determine the current operating condition of the technical installation from a plurality of partial operating conditions, wherein individual components of the installation are each allocated to the individual partial operating conditions, and said data processing arrangement is configured to bring together each of the individual partial operating conditions in a weighted manner to determine the current operating condition;
said data processing arrangement being configured to determine a future chronological course of the operating condition making use of component-specific ageing functions on a basis of the current operating condition, and to adjust a maintenance interval for the installation on a basis of the future chronological course of the operating condition, in order to specify a next maintenance date of the installation;
wherein the installation is a transformer, a gas-insulated switchgear, or an air-insulated switchgear.

Assignees

• Siemens Ag

Inventors

• Celik Serdar
• Kaiser Norbert

Classifications

• G06Q10/1093

  Calendar-based scheduling for persons or groups · CPC title

• G05B2219/32234

  Maintenance planning · CPC title

• G05B23/0283

  Predictive maintenance, e.g. involving the monitoring of a system and, based on the monitoring results, taking decisions on the maintenance schedule of the monitored system; Estimating remaining useful life [RUL] (preventive maintenance, i.e. planning maintenance according to the available resources without monitoring the system G06Q10/06) · CPC title

• G01R31/327

  Testing of circuit interrupters, switches or circuit-breakers · CPC title

• G06Q10/20 Primary

  Administration of product repair or maintenance · CPC title