Island transient stability determination method and system

A transient stability and determination method technology, applied in the direction of AC network circuits, electrical components, circuit devices, etc., can solve the problems of inaccurate and fragmented power system results

Active Publication Date: 2020-08-25
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +2
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Problems solved by technology

[0002] At present, the research on the transient stability of the power system is usually based on the method of optimizing the minimum unbalanced power. The relay protection system occupies an important position in the power system. However, in the current research, the power system relay protection The relay protection information provided by the system is separated from the system transient stability research, which leads to inaccurate research results on the transient stability of the power system

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  • Island transient stability determination method and system
  • Island transient stability determination method and system
  • Island transient stability determination method and system

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Embodiment Construction

[0062] The purpose of the present invention is to provide a material reverse design method and system based on privacy protection, so as to ensure the privacy of material data, implement machine learning training using data from various units, and overcome the model failure caused by small data. Technical problems of poor convergence and model generalization.

[0063] In order to make the above objects, features and advantages of the present invention more comprehensible, the invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0064] Such as figure 1 with 2 As shown, the present invention provides a method for determining the transient stability of an island, and the method includes the following steps:

[0065] Step 101, based on the power system dynamic equation of the generator, an analytical expression of the state vector of each generator in the island is established.

[0066] In step 101, based ...

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Abstract

The invention discloses an island transient stability determination method and system. The method comprises the steps of building a state vector analytic expression of each generator in an island based on a power system dynamic equation of the generators; converting the state vector analytic expression into a COI coordinate system to obtain a state vector analytic expression of each generator in the island under the COI coordinate system; based on the state vector analytic expression of each generator under the COI coordinate system, utilizing the transient energy function of the island to calculate the transient energy of the island; based on the state vector analytic expression of each generator and the state vector analytic expression under the COI coordinate system, calculating critical energy for stabilizing the island; calculating a difference value between the critical energy and the transient energy as an island stability margin; and determining the island transient stability according to the island stability margin. According to the method, the fault duration information which can be sensed by relay protection is combined, the energy function is applied to the split island, the constraint of time domain simulation is eliminated, and the calculation efficiency is improved on the premise that the precision is guaranteed.

Description

technical field [0001] The invention relates to the technical field of power system performance research, in particular to a method and system for determining transient stability of an isolated island. Background technique [0002] At present, the research on the transient stability of the power system is usually based on the method of optimizing the minimum unbalanced power. The relay protection system occupies an important position in the power system. However, in the current research, the power system relay protection The relay protection information provided by the system is separated from the transient stability research of the system, which leads to inaccurate research results of the transient stability of the power system. How to combine the protection information provided by the relay protection device with the transient stability of the isolated island to improve the accuracy of the research results of the transient stability of the power system has become an urgent...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/38
CPCH02J3/24H02J3/388H02J2203/10H02J2203/20
Inventor 王增平王彤相禹维张岩迟忠君张玉佳马慧远邵文君孟颖时伯年秦红霞张璇
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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