Method and device for producing a state signal

• US 9,261,864 B2
• Filed: 10/14/2010
• Issued: 02/16/2016
• Est. Priority Date: 10/14/2010
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Dzafic, Izudin
• Primary Examiner(s): Lo, Kenneth M
• Assistant Examiner(s): CHANG, SUNRAY
• Application Number:
  US13/879,452
• Publication Number:
  US 20140074305A1
• Time in Patent Office: 1,951 Days
• US Class Current: 1/1
• CPC Class Codes: G05B 13/04 involving the use of models or simulators
• CPC Class Codes: H02J 13/00006 characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
• CPC Class Codes: H02J 2203/20 Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
• CPC Class Codes: H02J 3/003 Load forecast, e.g. methods or systems for forecasting future load demand
• CPC Class Codes: H02J 3/008 involving trading of energy or energy transmission rights
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 10/50 Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
• CPC Class Codes: Y04S 20/00 Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
• CPC Class Codes: Y04S 40/12 characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
• CPC Class Codes: Y04S 40/20 Information technology specific aspects, e.g. CAD, simulation, modelling, system security

Abstract

A state signal is produced that indicates a state of an energy transmission system. In the method, for pre-determined network nodes of the energy transmission system, electrical measuring values for at least one electrical measuring variable are measured and used to produce the state signal indicating the state. Respectively predicted load data that predict the electrical behavior of the respective load are associated with the electrical loads connected to the energy transmission system. The electrical loads are respectively associated with an electrical load group into which the electrical loads are collected with comparable prognostic reliability. An individual weighting value that describes the prognosis reliability of the predicted load data of the loads associated with the load group is respectively allocated to each load group. The state signal is formed using the measuring values, the load data and the weighting values.

Claims

1. A method of generating a state signal that indicates a state of an energy transmission system, the method which comprises:

measuring electrical measured values for at least one electrical measurement variable for predetermined network nodes of the electricity transmission system;

assigning to each electrical load connected to the energy transmission system predicted load data predicting an electrical behavior of the respective load;

assigning each of the electrical loads to an electrical load group in which electrical loads with comparable prediction reliability are grouped together;

assigning each load group a respective individual weighting value describing a prediction reliability of the predicted load data of the loads assigned to the load group; and

generating the state signal by including the measured values, the load data and the weighting values, the state signal indicating the state of the energy transmission system.

2. The method according to claim 1, wherein:

load groups of electrical loads for which at least one measured consumption value of at least one energy consumption measurement device is present and also further load groups for electrical loads for which no measured consumption value is present, are available; and

the method comprises taking into consideration the prediction reliability and also a presence of a measured consumption value in the assignment of the electrical loads to one of the load groups.

3. The method according to claim 1, which comprises measuring at least one current climate measurement value and correcting the weighting values and/or the load data by including the current measured climate measurement values.

4. The method according to claim 3, which comprises effecting a correction if the current measured climate measurement value deviates from a predetermined nominal climate value.

5. The method according to claim 1, which comprises:

calculating simulated measurement variables by including the electrical measured values, the predicted load data and the weighting values for network nodes of the energy transmission system; and

checking the state of the energy transmission system by including the simulated measurement variables.

6. The method according to claim 5, which comprises calculating simulated measurement variables for the network nodes for which no electrical measured values are present.

7. The method according to claim 1, which comprises:

calculating simulated measurement variables for the predetermined network nodes for which electrical measured values are present;

comparing the simulated measurement variables to the predicted measured values; and

forming optimized load data by varying the predicted load data until the deviation between the simulated measurement variables and the electrical measured values becomes minimal or the value reaches or falls below a predetermined threshold.

8. The method according to claim 7, wherein the step of varying the predicted load data comprises taking into account the weighting values assigned to the respective load group by varying load data of which the weighting values indicate a lower prediction reliability in a greater range than load data of which the prediction value indicate a greater prediction reliability.

9. A device for generating a state signal that indicates a state of an energy transmission system, the device comprising:

an interface configured for input of electrical measured values that are measured for predetermined network nodes of the energy transmission system for at least one electrical measurement variable;

a control device connected to said interface and configured for forming load groups, assigning loads to the load groups and allocating a respective load group an individual weighting value that describes a prediction reliability of predicted load data of the loads assigned to the load group, and for checking the state of the energy transmission system by including the measured values, the load data and the weighting values and for creating a state signal indicating the state.