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Active stability control method for power system

A power system, active and stable technology, applied in power network operating system integration, information technology support systems, electrical components, etc., can solve problems such as large amount of information, difficult to control, dynamic optimization and failure of control objects, and ensure stability. running effect

Active Publication Date: 2021-11-30
CHINA ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method based on artificial intelligence algorithm is highly dependent on the degree of correlation between the sample and the actual power system, and there is a problem of failure when the structure or operation mode of the power system changes significantly; the method based on generator disturbance information requires a large amount of information and requires cluster co-ordination Aggregation and other processing are still difficult to apply to actual engineering
[0006] In terms of stability control, responsive stability control has high requirements for rapidity, so it is difficult to dynamically optimize the control amount and control object, and there is a failure situation where a single control measure cannot restore the power angle and voltage stability of the power system

Method used

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  • Active stability control method for power system
  • Active stability control method for power system
  • Active stability control method for power system

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Embodiment 1

[0054] refer to figure 1 , the embodiment of the present application provides an active stability control method for a power system, comprising the following steps:

[0055] Step S100, setting a deterioration threshold and a type judgment threshold.

[0056] Among them, the deterioration threshold is a basis for judging whether the power system is unstable, and the specific data is determined by the normal operation state of the power system. The type judgment threshold is a value used to judge the specific factors of instability after the instability occurs.

[0057] Preferably, the deterioration threshold includes a first deterioration threshold ε Lth and the second deterioration threshold ε asth , used to distinguish the deterioration level of the system.

[0058] According to some preferred embodiments of the present application, in step S100, it is also necessary to set an initial delay time T FS , and then wait until the initial delay time T FS After that, continue...

Embodiment 2

[0099] According to an embodiment of the second aspect of the present invention, a system is also provided, and the system includes:

[0100] Parameter setting module, capable of setting deterioration threshold and type judgment threshold;

[0101] The simplified branch transient transmission capacity index calculation module can measure the voltage amplitude and voltage phase of the nodes at both ends of each branch, and calculate the simplified branch transient transmission capacity index of each branch;

[0102] The key branch determination module can determine the key branch from multiple branches according to the simplified branch transient transmission capacity index of each branch;

[0103] An amplitude-phase correlation calculation module, capable of calculating the amplitude-phase correlation coefficient ratio of the key branch;

[0104] The deterioration degree judging module can determine the degree of deterioration of the power system stability based on the compar...

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Abstract

The invention discloses a stability control method for an electric power system and a system capable of operating the stability control method, and the stability control method for the electric power system comprises the following steps: calculating a simplified branch transient transmission capability index of each branch in the electric power system and amplitude-phase correlation of the index; and according to the method, determining the instability degree and the instability type of the electric power system, and then actively controlling the electric power system according to the instability degree and the instability type of the electric power system, so that stable operation of the electric power system is ensured.

Description

technical field [0001] The invention relates to the field of safety and stability analysis of power systems, in particular to an active stability control method for power systems. Background technique [0002] Among the three stability modes of frequency, power angle and voltage in power systems, the former has an easily distinguishable frequency representation, while the latter two have strong similarity representations of power angle and voltage that are difficult to distinguish, and the two modes are prone to mutual transformation. In the case of power angle instability or voltage instability in the power system, since the control measures for different instability situations are different, the identification of the dominant stability mode is the premise and basis for effective control. On the basis of accurately judging the dominant stability mode of the power system and sensing the stability situation, it is necessary to take timely and effective control measures to res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/24H02J3/12H02J3/14
CPCH02J3/241H02J3/12H02J3/144Y02B70/3225Y04S20/222
Inventor 郑超孙华东李文锋赵兵吕思卓杨大业陈怡君李惠玲
Owner CHINA ELECTRIC POWER RES INST
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