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Transient voltage safety and stability margin estimation method, device and system
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A safe, stable, transient voltage technology, used in circuit devices, electrical components, AC network circuits, etc.
Active Publication Date: 2021-04-13
NARI TECH CO LTD +3
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Problems solved by technology
[0004] In view of the above problems, the present invention proposes a transient voltage safety and stability margin estimation method, device and system, which can overcome the defects of relying on manual experience to set a small number of power grid operation modes and a small number of expected fault sets to evaluate the safety and stability of power grid transient voltage. Comprehensively grasp the safety and stability characteristics of the transient voltage of the power grid, and provide technical means to ensure the safety and stability of the power grid, economical and efficient, low-carbon and environmentally friendly operation
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Embodiment 1
[0071] An embodiment of the present invention provides a transient voltage safety and stability margin estimation method, such as figure 1 shown, including:
[0072] (1) With the minimum grouping number of cluster analysis samples as the optimization goal, based on the preset constraints, optimize the transient voltage safety and stability characteristic quantity difference requirement parameters and the parameters of the transient voltage safety and stability margin estimation model to obtain the sample group The center sample of each sample group in the sample group set, and the parameter optimization value of the transient voltage safety and stability margin estimation model of each sample group in the sample group set;
[0073] (2) Constructing an effective sample group set based on the sample group set, and calculating corresponding effective mode distances for each sample group in the effective sample group set;
[0074] (3) Constructing an estimated sample group set ba...
Embodiment 2
[0117] Based on the same inventive concept as in Embodiment 1, an embodiment of the present invention provides a transient voltage safety and stability margin estimation device, including:
[0118] The first calculation module is used to take the minimum grouping number of cluster analysis samples as the optimization goal, and optimize the transient voltage safety and stability characteristic quantity difference requirement parameters and the parameters of the transient voltage safety and stability margin estimation model based on the preset constraint conditions , to obtain the sample group set, the central samples of each sample group in the sample group set, and the parameter optimization value of the transient voltage safety and stability margin estimation model for each sample group in the sample group set;
[0119] The second calculation module is configured to construct an effective sample group set based on the sample group set, and calculate corresponding effective mod...
Embodiment 3
[0125] Based on the same inventive concept as in Embodiment 1, an embodiment of the present invention provides a transient voltage safety and stability margin estimation system, including: a storage medium and a processor;
[0126] The storage medium is used to store instructions;
[0127] The processor is configured to operate according to the instructions to execute the steps of the method according to any one of Embodiment 1.
[0128] Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, ...
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Abstract
The invention discloses a transient voltage safety and stability marginestimation method, device and system. The transient voltage safety and stability marginestimation method comprises the steps of: carrying out sample group number minimization grouping of samples for clustering analysis through optimizing a transient voltage safety and stability characteristic quantity difference requirement parameter and the parameters of a transient voltage safety and stability marginestimation model based on a preset constraint; determining the effective mode distance of each sample group by taking the central sample as the reference through optimizing the parameters of the mode distance model of each sample group based on the transient voltage safety and stability characteristic quantity; calculating the ratio of the mode distance between the central sample and the new mode to the effective mode distance for the sample group of which characteristic quantity associated equipment is in the commissioning state in the new mode; and estimating the transient voltage safety and stability margin of the new mode according to the central sample corresponding to the minimum value and a parameter optimization value of the margin estimation model of the sample group to which the central sample belongs. The calculation speed of transient voltage safety and stability evaluation is greatly improved.
Description
technical field [0001] The invention belongs to the technical field of power grid safety and stability analysis, and in particular relates to a transient voltage safety and stability margin estimation method, device and system. Background technique [0002] As the scale of the power grid increases, the amount of calculations for transient security and stability analysis based on time-domain simulation increases rapidly; as the proportion of new energy installed capacity in the power grid continues to increase and the scale of spot transactions in the power market continues to expand, temporary analysis of a small number of typical methods The power grid regulation mode based on state security and stability analysis is no longer suitable for the actual needs of flexible and changeable power grid operation modes; with the continuous emergence of power electronic characteristics of the power grid, the transient security and stability characteristics of the power grid are becomin...
Claims
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Application Information
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