A Discrimination Method Based on Oscillating Energy for Out-of-Synchronization

A technology of oscillation energy and identification method, applied in the direction of reducing/preventing power oscillation, to avoid identification errors

Inactive Publication Date: 2016-04-20
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In this way of thinking, two key issues are: 1) whether the port interconnection structure of the system can be described rigorously and intuitively; 2) whether the concept of energy can be properly proposed to meet the application requirements of the power system

Method used

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  • A Discrimination Method Based on Oscillating Energy for Out-of-Synchronization
  • A Discrimination Method Based on Oscillating Energy for Out-of-Synchronization
  • A Discrimination Method Based on Oscillating Energy for Out-of-Synchronization

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Embodiment Construction

[0030] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0031] The method provided by the present invention is based on the power system energy structure based on the Dirac structure and the Port Hamilton system, the energy on the energy structure satisfies the conditions of the Lyapunov energy function, and the interaction energy between subsystems can be used to characterize the oscillation problem in the Dynamic influences between systems within.

[0032] The power system energy structure based on Dirac structure and port Hamilton system is as follows:

[0033] V = Σ i = 1 n G V i ...

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Abstract

The invention discloses an out-of-step separation discrimination method based on oscillation energy in the technical field of electric power system planning and running control. The out-of-step separation discrimination method comprises the following steps of: judging whether a fault occurs on the system or not, if so, calculating oscillation energy at a position where a separation device on a call line is installed after each sampling according to continuous set times of sampling data of the position where the separation device on the call line is installed; judging whether out-of-step oscillation occurs on the call line of the system according to the oscillation energy at the position where the separation device on the call line is installed, and if so, the separation device on the call line is controlled to perform separation. Through the out-of-step separation discrimination method, correct judgment on the out-of-step oscillation on the call line according to the change of the oscillation energy can be made, accurate criterion is further provided for out-of-step separation, and occurrence of a large-scale power outage accident due to false discrimination of the out-of-step oscillation is avoided.

Description

technical field [0001] The invention belongs to the technical field of power system planning and operation control, and in particular relates to an out-of-synchronization and de-sequencing discrimination method based on oscillation energy. Background technique [0002] As the scale of interconnected power systems continues to expand, the frequency of out-of-step oscillations continues to increase. As an important part of the third line of defense in the power system (the first two lines of defense are relay protection and safety automatic devices), the out-of-synchronization and decommissioning criterion is very important for the identification of system out-of-synchronization oscillation and preventing the spread of accidents leading to large-scale power outages . When the power system is severely disturbed and the integrity of the power grid cannot be maintained, the decoupling device can decouple the large power grid to avoid the complete collapse of the power grid and e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/24
Inventor 陈艳波汪洋子马进
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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