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Method for establishing simulation error evaluation index based on trajectory characteristics

A technology for evaluating indicators and errors, applied in the field of parameter correction of numerical simulation models of power systems, can solve problems such as the influence of numerical simulation of component model parameters, and achieve the effects of improving simulation reliability, avoiding judgment errors, and reducing differences.

Pending Publication Date: 2019-12-03
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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Problems solved by technology

The results of the study show that errors in the parameters of the component model can have a significant impact on the numerical simulation

Method used

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  • Method for establishing simulation error evaluation index based on trajectory characteristics
  • Method for establishing simulation error evaluation index based on trajectory characteristics
  • Method for establishing simulation error evaluation index based on trajectory characteristics

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Embodiment 1

[0038] A method for establishing a simulation error evaluation index based on trajectory characteristics of the present invention is to use a hybrid dynamic simulation method of impact load injection to inject measured data into the simulation system; calculate the trajectory sensitivity of the simulation trajectory to each parameter, and select the one with greater trajectory sensitivity to be corrected Parameter set; use the corrected parameter set to perform hybrid dynamic simulation, and calculate the simulation error index before and after correction:

[0039] 1. Voltage error index.

[0040] Voltage is an important indicator for evaluating power quality, and the definition of voltage error index is helpful to analyze the trajectory difference of dynamic simulation before and after correction. After the power system is disturbed, the dynamic behavior and power angle of the bus voltage are different. Since the voltage is not a state variable, the voltage may change suddenl...

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Abstract

The invention belongs to the technical field of power system numerical simulation model parameter correction, and particularly relates to a method for establishing a simulation error evaluation indexbased on trajectory characteristics, in particular to a method for establishing a simulation credibility index system based on trajectory characteristics. The method comprises the following steps: injecting measured data into a simulation system by adopting a hybrid dynamic simulation method of impact load injection; calculating the track sensitivity of the simulation track to each parameter, andselecting a to-be-corrected parameter set with relatively high track sensitivity; performing hybrid dynamic simulation by using the corrected parameter group, and calculating simulation error indexesbefore and after correction, the simulation error indexes including a voltage error index and a power error index; comparing the error indexes before and after correction, and if the error value aftercorrection is smaller than the error value before correction, adopting the corrected parameters for simulation. According to the method, judgment errors caused by qualitative analysis are effectivelyavoided, the difference degree between simulation and actual measurement is reduced, and the simulation credibility is improved.

Description

technical field [0001] The invention belongs to the technical field of power system numerical simulation model parameter correction, and in particular relates to a method for establishing a simulation error evaluation index based on trajectory characteristics, in particular to a method for establishing a simulation credibility index system based on trajectory characteristics. Background technique [0002] As early as the 1960s, the concept of numerical simulation reliability was proposed. With the application of computers in many disciplines and engineering research fields, the issue of the reliability of numerical simulation has been paid more and more attention by people. Through the long-term efforts of researchers, the main components of the power system have established detailed simulation models, and the influence of different types of parameters in the model on the simulation results has been analyzed through simulation experiments. The research results show that the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06G06F17/50G06Q10/06
CPCG06Q50/06G06Q10/06393
Inventor 高凯苏安龙葛维春张艳军刘爱民孔剑虹李斌韩子娇屈超谢强刘凯那广宇赵鹏杨璐羽安军姜赫刘佳琦
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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