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Method for the status estimation of the AC/DC mixed power system

A technology of AC/DC hybrid and state estimation, applied in electrical components and other directions, which can solve problems such as large amount of calculation and large modification.

Inactive Publication Date: 2007-09-12
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the overall solution method is reliable and has good convergence, but the amount of calculation is very large, and the modification of the existing mature state estimation software in the dispatch center is relatively large

Method used

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  • Method for the status estimation of the AC/DC mixed power system
  • Method for the status estimation of the AC/DC mixed power system
  • Method for the status estimation of the AC/DC mixed power system

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Embodiment Construction

[0025] The method for the state estimation of the AC-DC hybrid power system of the present invention firstly sets the AC state variable x corresponding to the AC node at the AC-DC connection B , whose initial value is x B (0) , and set the virtual measurement injected into the DC side at the node at the AC-DC connection as Z″ B , whose initial value is Z″ B (0) ;

[0026] According to the above x B (0) and Z″ B (0) , using Newton's method to iteratively solve the DC state estimation equations, and obtain the estimated value of the DC state variable x D (1) , and its DC state estimation equations are:

[0027] H BD T ( x B , x D ) ...

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Abstract

The invention relates to a state estimation method which is used for alternating and directmix electrical power system. It belongs to the electrical power system movement and control technology area. The advantages of the invention are that mathematics inferential reasoning strict, the algorithm structure has explicit physics significance, the alternating and direct estimating equation formation and the solution mutually independent, the middle relation merely lies in when the iteration exchange the few data, has little amend to existing alternating-current system state estimation software, easy to realize, simultaneously also can satisfy the project request to estimate precision.

Description

technical field [0001] The invention relates to a method for state estimation of an AC / DC hybrid power system, which belongs to the technical field of power system operation and control. Background technique [0002] Energy management system (hereinafter referred to as EMS) is a computer-based dispatch automation system for modern power systems. Its task is to collect, monitor, analyze, optimize and control decisions in real time for power systems. Power system state estimation is the foundation and core link of EMS. State estimation uses real-time measurement information collected from the power system to eliminate error information and calculate complete, consistent and credible real-time variables of the power system to ensure EMS control decision-making. correctness. With the frequent occurrence of blackout accidents in developed countries in recent years, the research on state estimation has attracted more and more attention. For the problems existing in the current s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J5/00
Inventor 孙宏斌李大志张伯明刘崇茹
Owner TSINGHUA UNIV
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