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Method for estimating tracking state of wide area measurement system

A state estimation and measurement technology, applied in information technology support systems, AC network circuits, electrical components, etc., can solve the problem that the role of WAMS measurement is not fully exerted, ignores the real-time characteristics of WAMS, occupies memory resources and network load. and other problems, to achieve the effect of satisfying real-time operation, preventing power system accidents, and optimizing quickly.

Inactive Publication Date: 2012-12-12
SHANGHAI SUNRISE POWER TECH
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Problems solved by technology

The former ignores the real-time characteristics of WAMS, so that the role of WAMS measurement is not fully exerted. The latter has strong requirements on system resources, which will occupy a large amount of memory resources and network load, and may cause network congestion.

Method used

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  • Method for estimating tracking state of wide area measurement system
  • Method for estimating tracking state of wide area measurement system
  • Method for estimating tracking state of wide area measurement system

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Embodiment Construction

[0042] The embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings, but the present embodiments are not intended to limit the present invention, and all similar methods and similar changes of the present invention should be included in the protection scope of the present invention.

[0043] The present invention adopts a decision tree-based method of data mining to establish a decision tree for each node with load or injected power, and there is no correlation between each decision tree. Useful information is extracted from the historical tracking estimation result data and the invoked WAMS state value, which is used to guide whether to invoke the tracking state estimation. The final result is to give a series of solutions, which will complete the network state tracking of the whole network tracking state estimation.

[0044] Using the Decision Tree method of Data Mining, according to the historical tracking ...

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Abstract

The invention discloses a method for estimating the tracking state of a wide area measurement system (WAMS), which relates to the technical field of electric power system operation, and aims to solve the technical problems in the measurement of the WAMS. The method comprises the following flows: 1) establishing a related data area; 2) acquiring node branch model information for each node; 3) acquiring branch WAMS change information; 4) partitioning network subareas; 5) establishing a decision tree for each subarea; 6) selecting nodes and the attributes of the decision trees; 7) acquiring a plurality of sample data to train the decision trees so as to obtain the attribute values of the decision trees; 8) using part of samples to train and verify the obtained decision trees to acquire the optimal decision tree; 9) saving the decision tree of each subarea into the data area; and 10) repeating the steps from 2) to 9) to regenerate the decision trees if the node branch model has changes. The method estimating the tracking state of the WAMS has the characteristics of satisfying the real-time requirements of the system and satisfying the requirements on limited resources.

Description

technical field [0001] The present invention relates to power system operation and analysis technology, in particular to an implementation technology for power system analysis based on wide area measurement system (Wide Area Measurement System, WAMS) for state estimation. Background technique [0002] Power system state estimation (State Estimation, SE) is an important part of the energy management system (Energy Management System, EMS) management software, its function is to automatically eliminate errors caused by random disturbances on the basis of available real-time measurement information Information to calculate the state variables of the power system, that is, the voltage amplitude and phase angle of all buses. On the one hand, state estimation enables the dispatch center to grasp and monitor the real-time operation status of the power grid in a timely manner, and is the real-time data source of other network analysis software for EMS; on the other hand, the dispatch...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G06N1/00
CPCY04S10/54
Inventor 李昌章良栋杨晓玲
Owner SHANGHAI SUNRISE POWER TECH
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