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Method for modeling power load based on measurement-based method

An overall measurement and identification method, a technology of power load, applied in the direction of electrical components, circuit devices, AC network circuits, etc.

Active Publication Date: 2013-11-20
SHENZHEN SHUANGHE ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no load modeling method based on recorded wave data and belongs to the overall measurement and identification method.

Method used

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  • Method for modeling power load based on measurement-based method
  • Method for modeling power load based on measurement-based method
  • Method for modeling power load based on measurement-based method

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Embodiment Construction

[0144] The present invention will be described below in combination with specific embodiments.

[0145] A power load modeling method based on recorded wave data and belonging to the overall measurement and discrimination method has the following steps in sequence:

[0146] 1) Obtain the data required for load modeling by preprocessing the recorded wave data;

[0147] The recorded wave data is SSH339 collected at 17:08:25 on May 14, 2010, the instantaneous value of the three-phase voltage 11DL voltage and the instantaneous value of the three-phase current 11DL current at the load modeling node 11DL, that is, the three-phase voltage u a , u b , u c and the three-phase current i a i b i c , including fault recording data, including data of at least 2 cycles in the pre-steady state process, the entire obviously disturbed transient process after the fault, and at least 5 cycles in the process of the disturbance tending to be stable or the post-steady state process, and the sam...

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Abstract

The invention discloses a method for modeling a power load based on a measurement-based method. The method sequentially comprises the following steps of (1) preprocessing recording data to obtain data required by load modeling; (2) performing damped least-squares iterative equation solving on the preprocessed data required by the load modeling to obtain optimal load model parameters; (3) establishing an optimal load model by adopting the load model parameters; and (4) checking the obtained load model parameters, and verifying a load model with practical values comprising higher extrapolation capability, higher interpolation capability and higher capability in the comprehensive description of different load compositions to be the optimal load model. According to the method, the modeling cost is reduced; and the load model is more consistent with the actual condition of a field, high simulation accuracy and credibility are ensured, contrary conclusions under a clinical condition are completely avoided, the load model can be coordinated with the conventional power generation and distribution model, and the analysis of a power system is accurate and credible, so that the simulation analysis accuracy and credibility of the power system are remarkably improved.

Description

technical field [0001] The invention relates to electrical load modeling, in particular to an electrical load modeling method based on an overall measurement and discrimination method. Background technique [0002] The power system load model is a mathematical equation and corresponding parameters that reflect the characteristics of the power and current of the load port of the actual power system with its port voltage and frequency. Load modeling not only establishes models for various specific electrical equipment components, but more importantly, studies the relationship between the power absorbed by the overall load on the load bus and the change of the load bus voltage and frequency, and describes the mathematical equations that determine this relationship form and its parameters. Digital simulation of modern power system design, planning, decision-making and operation requires a more accurate load model. Because the change of the load model has different degrees of i...

Claims

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Application Information

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IPC IPC(8): H02J3/00
Inventor 赵忠黎波彭锦凤方荣鑫刘健
Owner SHENZHEN SHUANGHE ELECTRIC CO LTD
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