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Power line model parameter adaptability analysis method and system

A technology of model parameters and power lines, applied in the field of power systems, can solve the problems of differences in electrical characteristics and the inability to provide accurate references for power system analysis and calculation, and achieve the effect of ensuring stability and improving the level of risk management and control.

Pending Publication Date: 2022-05-13
北京中恒博瑞数字电力科技有限公司
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Problems solved by technology

[0004] The present invention proposes a power line model parameter adaptability analysis method and system, which solves the difference between the electrical characteristic quantity of the power grid fault state and the theoretical calculation value based on the line parameters in the prior art, and cannot provide accurate data for the analysis and calculation of the power system. Reference question

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  • Power line model parameter adaptability analysis method and system
  • Power line model parameter adaptability analysis method and system
  • Power line model parameter adaptability analysis method and system

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Embodiment 1

[0076] A total of 503 pieces of power line model parameters of a certain type in the relay protection setting calculation system in a certain area are used, and some data are shown in Table 1. This group of data is referred to as the data to be analyzed below.

[0077] Table 1 Sample data to be analyzed

[0078]

[0079] Using the fault recording parameter identification method to obtain power line parameter identification, the required recording data must meet the following requirements:

[0080] 1) The wire type used in the circuit where the wave recorder is located is consistent with the data to be analyzed;

[0081] 2) The wave recorders on both sides of the line have fault record files at the same time.

[0082] A total of 264 power failures of 110kV and above occurred in this area in the past 2 years, and a total of 6,573 fault recording files were generated, of which 177 groups of recording files met the requirements. After data processing and parameter identificat...

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Abstract

The invention relates to the technical field of power systems, and provides a power line model parameter adaptability analysis method and system, and the method comprises the steps: S100, obtaining a part of electrical parameters reflecting the actual operation characteristics of a power line as a characteristic parameter set, and obtaining the theoretical calculation electrical parameters of a power line model as a model parameter set; s200, performing statistical analysis on the model parameter set and the characteristic parameter set; and S300, the adaptability index I = I1 * I2 of the model parameter set is calculated, I1 represents the expected adaptability of the model parameter set, and I2 represents the interval adaptability of the model parameter set. Through the technical scheme, overall adaptability analysis and defect analysis of the line parameters can be realized, overall auditing and evaluation can be performed on effectiveness of various key parameters of the power line, common defects of the line parameters can be identified, a reference basis is provided for retest work of the line parameters, the risk management and control level of a relay protection system is improved, and the reliability of the relay protection system is improved. And stable and economic operation of a power system is ensured.

Description

technical field [0001] The present invention relates to the technical field of power systems, in particular to a method and system for analyzing the adaptability of parameters of a power line model. Background technique [0002] Power equipment parameters are the basis of power system analysis and calculation, especially the accuracy of parameters such as positive sequence and zero sequence impedance of power lines is crucial to the effectiveness of relay protection setting calculation results. At present, such parameters are mainly measured and recorded in the initial stage of power line formation. However, due to the limitations of test conditions and test methods, and the change of parameters with the increase of operation time, the electrical characteristics of the power grid fault state are different from those based on line parameters. There are differences in the theoretical calculation values, which cannot provide an accurate reference for the analysis and calculatio...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06H02H7/26
CPCG06Q50/06H02H7/26
Inventor 崔屹峰李书琦李雪冬崔晓慧仇向东周庆捷张永浩
Owner 北京中恒博瑞数字电力科技有限公司