Network load on-line modeling method based on PMU load characteristic

A technology of power grid load and modeling method, applied in simulators, instruments, control/regulation systems, etc., can solve problems such as less research, and achieve the effect of meeting the requirements of power grid digital simulation

Active Publication Date: 2013-08-14
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, there are few studies on the online modeling method of load characteristics based on PMU

Method used

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  • Network load on-line modeling method based on PMU load characteristic
  • Network load on-line modeling method based on PMU load characteristic
  • Network load on-line modeling method based on PMU load characteristic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0020] like figure 1 As shown, a PMU-based load characteristic grid load online modeling method includes the following steps:

[0021] Step 1: Identify the load test points of the wide-area control and protection system and the parameters of the improved clone selection algorithm. Due to price and technical limitations at this stage, it is difficult for the wide-area control and protection system to be fully observable, and it is difficult to measure the precise electrical quantities of all load nodes under the condition that the power grid cannot be observed. On the basis of investigation and analysis, reasonable load test points are selected; online modeling of load parameters requires the algorithm to have good convergence and operation speed, so the parameters of the algorithm need to be identified.

[0022] The second step: determine the load test point and conduct a dynamic model test on the PMU device, and improve the power simulation software system according to the p...

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PUM

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Abstract

The invention relates to a network load on-line modeling method based on a PMU load characteristic, comprising the following steps of 1) carrying out identification on a load test point of a wide area control protection system and a parameter of modifying a clone selection algorithm; 2) determining the load test point and carrying out a dynamic simulation test on a PMU device, and perfecting an electric power simulation software system according to the parameter of modifying the clone selection algorithm; 3) carrying out an artificial scene disturbance test according to the load test point and the result of the dynamic simulation test, so that the load modeling identification source data in a practical system are obtained; and 4) obtaining a comprehensive load model through combining load dynamic and static models according to the load modeling identification source data, converting the comprehensive load model into a load model of the electric power simulation software system, and carrying out checking. Compared with the prior art, the method has the advantage that the simulation precision is improved.

Description

technical field [0001] The invention relates to an online modeling method, in particular to a PMU-based online modeling method for load characteristic grid load. Background technique [0002] At present, my country's wide-area control and protection system is still in the development stage. Although it has potential broad application prospects, most of the wide-area control and protection systems that have been put into operation are still in related applications such as: measurement of power angle swing, low-frequency oscillation In the preliminary stage of capture, transient process-recording, etc., how to fully and deeply explore the role of PMU data in the wide-area control and protection system is still a problem to be explored by researchers, especially in the identification of load characteristics and simulation calculation verification. The application of this aspect needs further research. [0003] The digital simulation technology of power system security and stabil...

Claims

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Application Information

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IPC IPC(8): G05B17/02
Inventor 崔勇郭强
Owner STATE GRID CORP OF CHINA
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