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Comprehensive load model modeling method considering load low voltage release features

A technology that integrates load models and modeling methods, applied to electrical components, circuit devices, AC network circuits, etc., can solve problems such as the inability to describe the low-voltage release characteristics of loads

Active Publication Date: 2014-12-10
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This model overcomes the shortcoming that the traditional dynamic load model cannot describe the low voltage release characteristics of the load, and improves the accuracy and reliability of power system simulation calculations

Method used

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  • Comprehensive load model modeling method considering load low voltage release features
  • Comprehensive load model modeling method considering load low voltage release features
  • Comprehensive load model modeling method considering load low voltage release features

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Embodiment

[0068] In order to verify the effectiveness of the load model proposed by the present invention considering the low-voltage release characteristics of the load, a piece of measured data was taken, which lost part of the load during the voltage disturbance, and the traditional parameters and characteristic parameters of the load model were substituted into the load model equation , to get the fitting curve of active power and reactive power as Figure 4 and Figure 5 shown. Comparing and analyzing the fitting curves of active power and reactive power, it can be seen that the fitting effect of this load model considering the low-voltage release characteristics of the load is significantly better than the existing load model. Compared with the existing load model , the load model that considers the characteristics of the low-voltage release of the load can better describe the phenomenon of low-voltage tripping of the load in the stability analysis, making the system characterist...

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Abstract

The invention provides a comprehensive load model modeling method considering load low voltage release features. Feature parameters such as critical voltage when large-amount load removing is started, the time delay of the time when the voltage falls to the critical voltage and the time when the large-amount load removing is started, and the proportion of the loads with low-voltage protection in total loads are introduced into an existing comprehensive load model considering a power grid to describe disturbance middle load low voltage release features. By the model, the defect that a traditional dynamic load model cannot describe the load low voltage release features is overcome, and accuracy and credibility of power system simulation calculation are increased.

Description

technical field [0001] The invention relates to a modeling method, in particular to a comprehensive load model modeling method considering the low-voltage release characteristics of the load. Background technique [0002] With the improvement of the interconnection degree of the power system, the dynamic characteristics of the power grid under fault conditions become more and more complex. A comprehensive understanding of its characteristics. Because on the one hand, the requirements of the power grid itself determine that it is impossible to conduct experiments in the actual power grid to study the stability of the system; It is possible to conduct research on the stability of the grid in real systems. In this case, simulation becomes an indispensable tool for power grid operation, planning and design. [0003] In the actual power grid, the phenomenon of load low-voltage release occurs when disturbances occur many times. Taking Shanghai Power Grid as an example, on June...

Claims

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Application Information

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IPC IPC(8): H02J3/00
CPCH02J3/00
Inventor 王琦汤涌易俊赵兵刘丽平
Owner STATE GRID CORP OF CHINA
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