Method and system for controlling an operation of an electrical power network

• US 7,787,995 B2
• Filed: 03/01/2007
• Issued: 08/31/2010
• Est. Priority Date: 03/07/2006
• Status: Active Grant

• Current Assignee: Siemens AG
• Original Assignee: Siemens Energy Incorporated (Siemens AG)
• Inventors: Chen, Dingguo
• Primary Examiner(s): Decady; Albert
• Assistant Examiner(s): Stevens; Thomas H
• Application Number:
  US11/712,814
• Publication Number:
  US 20070211887A1
• Time in Patent Office: 1,279 Days
• Field of Search: 700/286, 700/291, 700/292, 702/58, 702/59, 702/60, 340/657
• US Class Current: 700/286
• CPC Class Codes: H02J 2203/20 Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
• CPC Class Codes: H02J 3/00 Circuit arrangements for ac mains or ac distribution networks
• CPC Class Codes: Y02E 60/00 Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
• CPC Class Codes: Y04S 40/20 Information technology specific aspects, e.g. CAD, simulation, modelling, system security

Abstract

A system (400) and method for controlling an operation of an electrical power network (420) is described. The method includes configuring an allowable performance of an electrical power network over a predetermined time period as a probability expression comprising a historical term and a future term having an electrical power network operating condition variable. The method also includes calculating a network performance target value (300) according to the probability expression by using a historical electrical power network operating condition value for the electrical power network operating condition variable. The method further includes using the performance target value for controlling the electrical power network effective to achieve the allowable performance. The system includes a database (406), a processor (404) coupled to the database, and a monitoring and control module (410) coupled to the processor.

Claims

1. A method for controlling an operation of an electrical power network, comprising:

representing an allowable control performance standard of an electrical power network over a predetermined time period as a probability expression comprising a historical term for elapsed time of the predetermined time period, a future term for remaining time of the predetermined time period, and an electrical power network operating condition value;

determining a value of the historical term responsive to historical operating parameters;

calculating a network clock-minute ACE target value for the remaining time according to the probability expression, the value of the historical term, and the remaining time and using a historical value for the electrical power network operating condition value;

determining an instantaneous performance value of the electrical power network;

calculating a deviation ratio between the performance target value and the clock-minute ACE instantaneous value for a monitoring interval;

calculating a sum of respective deviations between the performance target value and the clock-minute ACE instantaneous value for a plurality of monitoring intervals;

calculating a deviation ratio of the sum of respective deviations and a number of the plurality of monitoring intervals; and

using the performance target value for controlling the electrical power network to satisfy the control performance standard.

2. The method of claim 1, further comprising calculating an average clock-minute ACE target value responsive to a sum of the deviation ratio and the clock-minute ACE target value.