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On-site transient overvoltage measuring method based on network transfer function calculation

A technology of transient overvoltage and transfer function, which can be used in measuring devices, measuring electrical variables, measuring current/voltage, etc., and can solve different problems and achieve different effects.

Active Publication Date: 2012-08-22
EAST CHINA ELECTRIC POWER TEST & RES INST +1
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Problems solved by technology

[0023] The task of the present invention is to provide a kind of on-the-spot transient overvoltage measurement method based on the network transfer function calculation, which overcomes the difficulties of the prior art, and uses the network transfer function H to replace the transformation ratio K for transient voltage calculation, which can overcome its The problem that each harmonic component is different, to achieve the purpose of accurately measuring (monitoring) the transient overvoltage on site

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  • On-site transient overvoltage measuring method based on network transfer function calculation
  • On-site transient overvoltage measuring method based on network transfer function calculation
  • On-site transient overvoltage measuring method based on network transfer function calculation

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Embodiment Construction

[0053] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0054] see Figure 1 to Figure 6 , the specific implementation manner of the on-site transient overvoltage measurement method based on network transfer function calculation of the present invention is as follows:

[0055] 1. Description of transfer function calculation method

[0056]The calculation theory of transfer function (also known as transfer function) is introduced here. Once the (capacitive) voltage divider actually constructed on site is completed, its existing capacitance, inductance, resistance and other parameters will be fixed, which is equivalent to A network that acquires the input x (primary voltage) and output y (secondary voltage) signals is defined as:

[0057] (6)

[0058] In the formula: and For input and output signals; for taking points.

[0059] Then the following equation holds in the ti...

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Abstract

The invention relates to an on-site transient overvoltage measuring method based on network transfer function calculation. The on-site transient overvoltage measuring method comprises the following steps that: (1) a transient overvoltage measurement voltage divider is built; (2) the simulated transient overvoltage is exerted or filled at one side of the transient overvoltage measurement voltage divider and is measured and recorded by a standard measuring system, the measuring value is the input x of the primary side of an on-site monitoring system, meanwhile, the measuring value of the on-site monitoring system is the output y, and the actual measurement of the transfer function H of the on-site monitoring system is carried out; (3) the actual measurement of the transfer function H of the built transient overvoltage measurement voltage divider is carried out and is recorded in the on-site monitoring system; and (4) a standard measuring system is removed, the on-site monitoring system operates, and the transfer function H replaces the transformation ratio K for calculation when the transient overvoltage is detected. The method provided by the invention has the advantages that the network transfer function H is used for replacing the transformation ratio K for the transient overvoltage calculation, and the problem of differences at each harmonic component can be solved.

Description

technical field [0001] The invention relates to a field measurement method for transient overvoltage of a power system, in particular to a field transient overvoltage measurement method based on network transfer function calculation. Background technique [0002] 1. The importance of transient overvoltage monitoring [0003] The insulation condition of power electrical equipment is directly related to the reliability of power system operation, and transient overvoltage plays a decisive role in the selection of system (equipment) insulation level. Accurate recording of transient overvoltage data on site, combined with comprehensive analysis of the relationship between electrical equipment insulation coordination and equipment insulation status, it is very important to establish a power system electrical equipment insulation safety prediction analysis method and transient overvoltage monitoring. [0004] 2. Current methods of transient overvoltage monitoring [0005] Transie...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/165
Inventor 金珩刘兆林司文荣
Owner EAST CHINA ELECTRIC POWER TEST & RES INST
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