Online dynamic load modeling method based on fault recorder data

A fault recorder, dynamic load technology, applied in electrical digital data processing, special data processing applications, instruments, etc.

Inactive Publication Date: 2013-09-25
SHANDONG UNIV
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Problems solved by technology

[0005] And currently there is no effective combination of faul

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  • Online dynamic load modeling method based on fault recorder data
  • Online dynamic load modeling method based on fault recorder data
  • Online dynamic load modeling method based on fault recorder data

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0030] The present invention uses fault recorder data to carry out online dynamic load modeling. On the basis of classification based on time characteristics, a power load recursive correction modeling method based on progressive learning is proposed. Basically, each set of disturbance data is collected to correct the original model parameters online, and only the corrected model parameters can be saved without saving all historical samples, which improves the operating efficiency of the modeling.

[0031] 1. Dynamic load model structure

[0032] For the dynamic load model, the model structure of the static characteristics of the parallel load of the third-order induction motor is often used. The equivalent circuit diagram of the model is shown in figure 1 Shown: The load model structure of the static characteristics adopts the ZIP model or the power f...

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Abstract

The invention relates to an online dynamic load modeling method based on fault recorder data. The method is correct and effective, simple and high in precision compared with a parameter weighted average method and a clustering center method based on standard actual measured samples and can facilitate online dynamic load modeling based on the fault recorder data. The method includes that (1) on the basis of historical samples for identifying load model parameters, voltage excitation of new samples is exerted on a load model, and load power response is obtained; (2) the power response and actual measured power response of the new samples are fitted integrally and optimized to be a target, parameter optimization is conducted by adopting a curve fitting method, and a modified comprehensive load model is obtained, and only modified model parameters are stored instead of all historical samples.

Description

technical field [0001] The invention relates to a power system digital simulation technology, in particular to an online dynamic load modeling method based on fault recorder data. Background technique [0002] At present, the digital simulation of power system has become the main tool for power system design, planning and operation, and the corresponding decision-making is all based on the results of digital simulation. The accuracy of the simulation results has an important impact on the safe, reliable and economical operation of the power system. As the basis of digital simulation, the accuracy of the load model has a great influence on the simulation results. A large number of research results show that the load model has varying degrees of influence on power flow calculation, small disturbance stability, voltage stability, and transient stability. However, due to its own complexity, dispersion and randomness, the establishment of integrated load model has always been a ...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 梁军徐兵贠志皓
Owner SHANDONG UNIV
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