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On-line analysis and early warning method of power system subsynchronous oscillation based on time domain simulation

A technology of subsynchronous oscillation and time domain simulation, which is applied in the fields of electrical digital data processing, instrumentation, and calculation.

Active Publication Date: 2016-08-10
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] For the eigenvalue analysis method, the coefficient matrix formed after the linearization of the generator and system model increases exponentially with the number of components, and it can reach hundreds of thousands for complex systems, so it is difficult to accurately solve its eigenvalues

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  • On-line analysis and early warning method of power system subsynchronous oscillation based on time domain simulation

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0031] Such as figure 1 , provide a time-domain simulation-based power system subsynchronous oscillation online analysis and early warning method, the method includes the following steps:

[0032] Step 1: Establish the original time-domain simulation model of subsynchronous oscillation;

[0033] Step 2: Form a time-domain simulation model of the subsynchronous oscillation current working condition;

[0034] Step 3: Form a time-domain simulation model of subsynchronous oscillation adjacent working conditions;

[0035] Step 4: Conduct electromagnetic transient time-domain simulation calculations, analyze the simulation results, summarize the analysis results, and give subsynchronous oscillation warning information.

[0036] The original time-domain simulation model of the subsynchronous oscillation in the step 1 includes the shafting model of the generating ...

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Abstract

The invention provides an electrical power system subsynchronous oscillation on-line analyzing and early-warning method based on time-domain simulation. The electrical power system subsynchronous oscillation on-line analyzing and early-warning method based on time-domain simulation comprises the following steps that a subsynchronous oscillation original time-domain simulation model is built; a subsynchronous oscillation current working condition time-domain simulation model is formed; a subsynchronous oscillation adjacent working condition time-domain simulation model is formed; electromagnetic transient time-domain simulation calculation is conducted, simulation results are analyzed, the analyzed results are gathered, and subsynchronous oscillation early-warning information is provided. According to the electrical power subsynchronous oscillation on-line analyzing and early-warning method based on the time-domain simulation, current working condition is captured in a timing mode, the risks of the occurrence of subsynchronous oscillation under all kinds of adjacent working conditions of the current working condition, and early-warning information is provided. The electrical power system subsynchronous oscillation on-line analyzing and early-warning method based on the time-domain simulation overcomes the defects that offline analyzing has a lot of working conditions, and is large in calculation amount and incomplete in working condition coverage.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to an on-line analysis and early warning method for subsynchronous oscillation of electric power systems based on time domain simulation. Background technique [0002] Power system subsynchronous oscillation is a subsynchronous frequency electromechanical coupling oscillation phenomenon between the electrical system and the rotor mechanical system of the turbo-generator set, which will cause fatigue loss to the shafting of the generating set, and in severe cases, cause damage to the shafting of the unit. [0003] At present, for the risk analysis of power system subsynchronous oscillation, common methods include frequency sweep method, eigenvalue analysis method, time domain simulation method, etc., all of which adopt offline analysis method in application. Since the risk of subsynchronous oscillation is related to the operation mode of the system, includi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50
CPCY02E60/00
Inventor 杜宁宋瑞华陈珍珍刘传文班连庚项祖涛周佩朋韩亚楠杨大业马其燕
Owner STATE GRID CORP OF CHINA