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Method and system for detecting amplitude of signal in power system

A technology of power system and signal amplitude, applied in the field of electric power, can solve the problems of low detection efficiency and time-consuming, and achieve the effect of less time-consuming and improved detection efficiency

Inactive Publication Date: 2014-12-10
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] Based on this, it is necessary to provide a method and system for detecting the signal amplitude in the power system for the above-mentioned amplitude calculation, which requires a low-pass filter link with a large time constant, which consumes a lot of time and has low detection efficiency.

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  • Method and system for detecting amplitude of signal in power system
  • Method and system for detecting amplitude of signal in power system
  • Method and system for detecting amplitude of signal in power system

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[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0024] Although the steps in the present invention are arranged with labels, they are not used to limit the order of the steps. Unless the order of the steps is clearly stated or the execution of a certain step requires other steps as a basis, the relative order of the steps can be adjusted.

[0025] see figure 1 , figure 1 It is a schematic flow chart of the first embodiment of the method for detecting the signal amplitude in the power system of the present invention.

[0026] The method for detecting the signal amplitude in the power system of this embodiment includes the following steps:

[0...

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Abstract

The invention discloses a method and a system for detecting the amplitude of a signal in a power system. The method comprises the steps of performing square operation processing on a signal in the power system to obtain a first signal, inputting the signal into a phase-shifting circuit, performing 90-degree phase shifting on the signal to generate a 90-degree phase shifted signal, performing square operation processing on the 90-degree phase shifted signal to obtain a second signal, performing additive operation processing on the first signal and the second signal to obtain a third signal, and performing square root operation processing on the third signal to obtain the amplitude of the signal. Due to the implementation of the method and the system, the time process of amplitude detection is smooth without fluctuation, less time is consumed and the detection efficiency is greatly improved.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method and system for detecting signal amplitude in a power system. Background technique [0002] In some thermal control devices of thermal power plants, the nature of the input signal and the output signal are different, the input signal is constant without fluctuation, and the output is a sine wave signal. When these thermal control devices constitute a negative feedback control device, the sine wave signal cannot be directly used as the process feedback signal of the negative feedback control device. Used as a process feedback signal for a negative feedback control device. [0003] However, the signal output by the current amplitude detection link has large fluctuations. In order to meet the needs of negative feedback control, the amplitude signal must be smoothed. Commonly used signal smoothing is achieved by low-pass filtering the amplitude signal. However, when...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/00
Inventor 李军万文军
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID