Reactive network loss based method for distinguishing reactance parameters of branch of electric power system
A power system and parameter identification technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of residual pollution, difficult to accurately locate the position of wrong parameters, etc., to achieve less calculation and accurate positioning , precise positioning effect
Active Publication Date: 2012-11-14
STATE GRID JIANGXI ELECTRIC POWER CO +1
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[0004] In the process of power system modeling, it is necessary to identify and estimate wrong branch reactance parameters. Because parameter errors will cause residual pollution, it is difficult for traditional power system branch reactance parameter identification methods to accurately locate the wrong parameters.
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[0024] The reactive parameter identification method of the branch circuit of the power system based on the reactive power loss proposed by the present invention comprises the following steps:
[0025] (1) According to the measurement value of the measurement system in the power system, the reactive power loss measurement value and capacity measurement value of each branch in the power grid are calculated, and the calculation formula is as follows:
[0026] Ql k meas = | Q kij meas + Q kji meas |
[0027] S k meas = 1 2 ( P kij meas ) 2 ...
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The invention relates to a reactive network loss based method for distinguishing reactance parameters of a branch of an electric power system, and belongs to the technical fields of automation of electric power system dispatching and power network simulation. The method comprises the following steps of: measuring data through the electric power system, and calculating the transmission power capacity of each branch and the measurement value of reactive network loss; estimating the results of calculation according to the state of the electric power system so as to obtain the transmission power capacity of each branch and the estimated value of the reactive network loss; and carrying out subtraction on the measurement value and the estimated value to obtain the transmission power capacity ofeach branch and the residual error of the reactive network loss. Comparing the symbol of the residual error of the transmission power capacity of each branch with the symbol of the reactive network loss, and verifying the reactance parameters of the branch when the symbols are contrary to each other. The method achieves little calculation, easiness and convenience for implementation and accurate positioning of poor reactance, and can realize the accurate positioning of wrong parameters as the relation between the reactive network loss and the branch capacity can most directly represent the reactance value of the branch.
Description
technical field [0001] The invention relates to a method for identifying reactance parameters of power system branch circuits based on reactive power network losses, and belongs to the technical field of power system dispatching automation and power grid simulation. Background technique [0002] The branch parameters of the power system are the basis of most power system analysis and calculation functions. In the process of power system modeling, there may be some wrong branch parameters with inaccurate values. These wrong branch parameters, especially wrong branch reactance parameters will seriously affect the accuracy and reliability of power system analysis and calculation, so it is necessary to study how to identify wrong branch reactance parameters in power systems. [0003] Traditional branch reactance parameter identification methods are based on Lagrangian multiplier method or sensitivity method. These methods assume that if there is an error in the reactance parame...
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IPC IPC(8): G06F17/50
Inventor 张伯明吴文传郭玉金姚诸香孙宏斌郭烨郭庆来
Owner STATE GRID JIANGXI ELECTRIC POWER CO