Evaluation method for stable operation state of power system
A power system and stable operation technology, applied in the field of electric power, can solve problems such as low operating efficiency and complex operating status evaluation methods, and achieve the effect of simplifying the process, ensuring safe and stable operation, and reducing the probability of failure
Inactive Publication Date: 2015-12-16
STATE GRID CORP OF CHINA +1
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[0004] The existing power system operation status evaluation method is relatively complicated, resulting in low operation efficiency. Therefore, how to judge the operation status of the power system concisely and efficiently, so that the operation and maintenance personnel can carry out corresponding dynamic inspections with clear goals based on the evaluation results. become a problem to be solved in this technical field
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[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0027] see figure 1 , in an embodiment of the present invention, a method for evaluating a stable operating condition of a power system includes the following steps:
[0028] (1) Establish an evaluation index system for power system operation status.
[0029] The power system operation status evaluation index system covers the system power flow overload risk index, the system voltage limit risk index, the system static voltage instability risk index and the system cascading ...
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The invention discloses an evaluation method for the stable operation state of a power system. The evaluation method comprises that (1) an operation state evaluation index system of the power system is established; (2) an index of the operation state evaluation index system are calculated; (3) a neural network model is established according to the operation state evaluation index system and solved to obtain an operation state value of the power system; and (4) the operate state value is compared with a preset stable operation threshold to obtain the stable operation level of the power system, and a state early warning or maintenance strategy is made according to the stable operation level. The power system is evaluated in real time by establishing the operation state evaluation index system of the power system and evaluating the index system according to the operation state of the power system; and use of the neural network model greatly simplifies the modeling process of the operation state evaluation index system of the power system, reduces the computational complexity, and is low in errors and more practical.
Description
technical field [0001] The invention relates to the field of electric power, in particular to a method for evaluating a stable operating state of a power system. Background technique [0002] With the continuous development of the power system, the scale of the system is getting larger and the structure is more and more complex. Any accident may bring serious harm to the power system, and even bring great harm to the whole society. Therefore, it is very important to timely discover the risks affecting the safe operation of the power system and take countermeasures as soon as possible to ensure the safe operation of the power system and reliable power supply to users. [0003] In order to avoid power outages in the power system, especially large-scale power outages caused by cascading faults, it is necessary to establish a complete power system operation status evaluation index system, and on this basis to model and calculate various indicators of the power system, which is v...
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Inventor 魏光王强杨志伟李腾飞尉永杨宝勇刘少敏毕研兵
Owner STATE GRID CORP OF CHINA