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Method and system for adjusting error parameters in power grid

An error parameter and adjustment method technology, applied in the electric power field, can solve the problems of large deviation of the objective function value, wrong network parameters, affecting the normal operation of the power system, etc., and achieve the effect of reducing data redundancy and improving accuracy.

Active Publication Date: 2016-06-08
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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Problems solved by technology

[0004] Based on this, it is necessary to address the problem that in the state estimation of the power grid, if the network parameters are wrong, the value of the objective function will deviate greatly, which will seriously affect the state estimation results of the power system, and then affect the normal operation of the power system. Parameter adjustment method and system

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  • Method and system for adjusting error parameters in power grid
  • Method and system for adjusting error parameters in power grid
  • Method and system for adjusting error parameters in power grid

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Embodiment Construction

[0021] see figure 1 , figure 1 is a schematic flowchart of the first embodiment of the method for adjusting error parameters in the power grid of the present invention.

[0022] The method for adjusting error parameters in the power grid in this embodiment includes the following steps:

[0023] Step 101 , calculating the percentage residual of the state variable of the power grid according to the residual value of the state variable.

[0024] Step 102, compare the percentage residual with a residual threshold, if the percentage residual is greater than the residual threshold, use the state variable as a problem variable, and use the branch related to the problem variable as a suspicious branch road.

[0025] Step 103, adjusting suspicious parameters of the suspicious branch.

[0026] Step 104, judging whether the change of the suspicious parameter will cause the function value of the state estimation objective function of the state variable to change, and if so, judging th...

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Abstract

The invention discloses a method and system for adjusting error parameters in a power grid, comprising: calculating the percentage residual of the state variable according to the residual value of the state variable of the power grid; If the percentage residual is greater than the residual threshold, the state variable is used as a problem variable, and the relevant branch of the problem variable is used as a suspicious branch; the suspicious parameters of the suspicious branch are adjusted; Whether the change of the parameter will cause the function value of the state estimation objective function of the state variable to change, and if so, determine that the suspicious parameter is an error parameter; modify the error parameter to obtain the corrected value of the error parameter, and adjusting the suspicious parameter of the suspicious branch to the correction value. By implementing the method and system of the present invention, the accuracy of diagnosing faulty data is improved without reducing data redundancy.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method and system for adjusting error parameters in a power grid. Background technique [0002] The state estimation of power system, as the basic module of energy management system, is the basis of all advanced applications. Most of the existing state estimation algorithms use the basic weighted least squares method, or the fast decoupling method derived from it. [0003] However, in the state estimation process, if the network parameters are wrong, the objective function value will deviate greatly, which will seriously affect the state estimation results of the power system, and then affect the normal operation of the power system. Contents of the invention [0004] Based on this, it is necessary to address the problem that in the state estimation of the power grid, if the network parameters are wrong, the value of the objective function will deviate greatly, which...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00
Inventor 谢国财胡亚平余南华周华锋赵旋宇
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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