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Power transmission line parameter correction method

A transmission line and parameter correction technology, which is applied in electrical digital data processing, CAD numerical modeling, special data processing applications, etc. , the effect of fast calculation speed and high engineering practical value

Active Publication Date: 2021-09-21
CHINA SOUTHERN POWER GRID COMPANY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006]In order to overcome the current method of adding parameters as state variables to the state estimation for calculation, the numerical stability of the state estimation after the augmentation of the parameters becomes worse and the calculation time increases defects, the present invention proposes a transmission line parameter correction method

Method used

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Embodiment

[0087] Such as figure 1 The flow chart of the shown transmission line parameter correction method, see figure 1 , the method includes:

[0088] A transmission line parameter correction method at least includes:

[0089] S1. Determine each state estimation cycle and transmission line parameters to be corrected, the transmission line parameters to be corrected include transmission line reactance parameters and transmission line susceptance parameters to ground, and set the transmission line parameter correction times threshold to be corrected;

[0090] In this embodiment, the state estimation period is 1 minute, and the threshold for the correction times of the transmission line reactance parameter to be corrected is 30, then the time window for the correction of the transmission line reactance parameter is half an hour; the transmission line to ground susceptance parameter to be corrected The threshold of correction times is 30, then the time window for the correction of the ...

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Abstract

The invention provides a power transmission line parameter correction method, which overcomes the defects that the stability of a state estimation numerical value after parameter augmentation becomes poor and the calculation time is increased due to a current calculation method for augmenting a parameter as a state variable into state estimation, and comprises the following steps of: firstly, determining each state estimation period and a to-be-corrected power transmission line parameter; comprising a power transmission line reactance parameter and a power transmission line earth susceptance parameter; and according to active measurement quality and reactance parameter identifiability analysis, calculating a correction value of the line reactance parameter by using an active measurement value of one end with a high active measurement quality score in two ends of the line and state estimation values of voltage amplitudes and phase angles at the two ends of the line; according to the reactive measurement quality, calculating the correction value of the earth susceptance parameter of the line by utilizing the reactive measurement values at the two ends of the line and the state estimation values of the voltage amplitude and the phase angle. An existing state estimation program does not need to be modified, the numerical stability is high, the calculation speed is high, and the engineering practical value is high.

Description

technical field [0001] The present invention relates to the technical field of power transmission line parameter correction, and more specifically, to a power transmission line parameter correction method. Background technique [0002] A modern energy management system (Energy Management System, EMS) is an application software system that uses a power grid model (including parameters) and real-time collection for analysis, evaluation, and decision-making. Parameter errors have long been a problem that has plagued the practical application of EMS. With the expansion of the grid scale and the rapid development of the power market, the requirements for the reliability and accuracy of EMS software analysis and decision-making are getting higher and higher. It is of great practical significance to study practical error parameter identification and correction methods. [0003] Since the actual operating conditions of the transmission line are very complex, the terrain environment ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F111/10G06F113/04
CPCG06F30/20G06F2111/10G06F2113/04Y02E40/30
Inventor 赵化时赵旋宇周华锋胡亚平何宇斌
Owner CHINA SOUTHERN POWER GRID COMPANY
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