Method for comprehensively evaluating precision of stability calculation models and parameters based on PMU data

A technology of stable calculation and comprehensive evaluation, applied in the fields of calculation, electrical digital data processing, special data processing applications, etc., can solve the problems of time-domain simulation model and parameter accuracy power system security, stable operation and other issues

Active Publication Date: 2010-06-16
NARI TECH CO LTD
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Problems solved by technology

The accuracy of the time domain simulation model and parameters will have an impact on the safe and stable operation of the power system

Method used

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  • Method for comprehensively evaluating precision of stability calculation models and parameters based on PMU data
  • Method for comprehensively evaluating precision of stability calculation models and parameters based on PMU data
  • Method for comprehensively evaluating precision of stability calculation models and parameters based on PMU data

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Embodiment Construction

[0014] Attached below figure 1 , the method of the present invention is described in detail.

[0015] figure 1 Step 1 in the above describes the time-domain simulation calculation, that is, according to the operating state of the actual power grid when a disturbance occurs, combined with the calculation model and parameters of the power grid transient state and dynamic security and stability, a time-domain simulation example of the actual power grid disturbance is established, and the actual power grid occurs Time-domain simulation of the electromechanical transient process and dynamic process after the disturbance;

[0016] figure 1 In step 2, the safety and stability margin and mode calculation are described, that is, for the time-domain simulation trajectory calculated in step 1, the transient power angle stability quantitative evaluation method (EEAC), the transient voltage safety and stability quantitative analysis method, and the transient State frequency safety quant...

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Abstract

The invention belongs to the technical field of the calculation and analysis of a power system, and discloses a method for comprehensively evaluating the precision of stability calculation models and parameters based on PMU data. The method comprises the following steps: performing time-domain simulation on an electromechanical transient process and an electromechanical dynamic process for the disturbance of a power grid, and adopting a power system security and stability quantitative analyzing method to calculate transient security and stability margins, modes, dynamic oscillation damping ratio and frequency; (2) adopting PMU actually-measured data on the power angle and frequency of a generator and the voltage and frequency of a busbar after the disturbance of the power grid to take place of time-domain simulation results of corresponding physical quantities, and then adopting the power system security and stability quantitative analyzing method to calculate the transient security and stability margins, the modes, the dynamic oscillation damping ratio and the frequency; and (3) comprehensively evaluating the precision of transient and dynamic security and stability calculation models and the parameters by comparing differences between the two transient and dynamic security and stability margins and the modes. Through the method, reliability evaluation on the transient and dynamic security and stability simulation calculation results of the power system is realized.

Description

technical field [0001] The invention belongs to the technical field of power system calculation and analysis. Background technique [0002] Power system time-domain simulation is a commonly used analysis method in power system planning, design, and operation departments. The accuracy of time-domain simulation is closely related to the accuracy of the models and parameters used. Due to various reasons, the design parameters provided by the manufacturer are often used in actual analysis, and even estimated values ​​are used. The research shows that choosing different models and parameters will lead to different or even opposite conclusions in power system analysis. The accuracy of the time domain simulation model and parameters will have an impact on the safe and stable operation of the power system. [0003] With the construction of the wide area measurement system (WAMS) system of the synchrophasor measurement unit (Phasor Measurement Unit, PMU), various kinds of measured ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00G06F19/00
Inventor 徐泰山李碧君万芳茹鲍颜红方勇杰薛禹胜许剑冰杨卫东郑伟
Owner NARI TECH CO LTD
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