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High-frequency transient component direction pilot protection method and system

A transient component, longitudinal protection technology, applied in emergency protection circuit devices, electrical components, etc., can solve the problems of inaccurate fault signal detection, inability to analyze power quality signals, etc.

Pending Publication Date: 2021-04-02
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problems existing in the prior art are: the fault signal detection of the existing transmission line is inaccurate; at the same time, the power quality signal cannot be accurately and quickly analyzed

Method used

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  • High-frequency transient component direction pilot protection method and system
  • High-frequency transient component direction pilot protection method and system
  • High-frequency transient component direction pilot protection method and system

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Embodiment Construction

[0070] In order to further understand the content, features and effects of the present invention, the following examples are given, and detailed descriptions are given below with reference to the accompanying drawings.

[0071] The structure of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0072] Such as figure 1 As shown, the high-frequency transient component directional longitudinal protection method provided by the present invention includes the following steps:

[0073] S101: Detect the current data of the transmission line with the ammeter through the current detection module; detect the voltage data of the transmission line with the voltmeter through the voltage detection module; detect the fault signal of the transmission line with the fault detector through the fault detection module.

[0074] S102: The main control module uses the curve drawing module to draw current and voltage change curves through the cur...

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Abstract

The invention belongs to the technical field of high-frequency transient component direction pilot protection, and discloses a high-frequency transient component direction pilot protection method andsystem. The system comprises a current detection module, a voltage detection module, a fault detection module, a main control module, a change curve drawing module, a transient component extraction module, a fault identification module, an electric energy quality signal analysis module, a highest frequency component solving module, a phase difference solving module, a data storage module, a terminal module and a display module. According to the invention, the clear analytical expression of the fault component current of a multi-terminal direct-current system line is established through a faultdetection module, so that threshold setting is easy to realize, and the robustness and accuracy of multi-terminal direct-current system fault detection are improved; various typical transient electric energy quality signals, such as sudden voltage rise, sudden voltage drop, transient change, harmonic waves, transient pulses and the like in an electric power system can be rapidly and accurately analyzed through an electric energy quality signal analysis module; and calculation is simple, and the system can be used for real-time online analysis.

Description

technical field [0001] The invention belongs to the technical field of high-frequency transient component directional longitudinal protection, and in particular relates to a high-frequency transient component directional longitudinal protection method and system. Background technique [0002] Analyze the behavior (such as current, voltage, etc.) of a circuit composed of linear circuit elements in a transient state. The transient state of the circuit refers to the process between the circuit from one stable working state to another stable state. The current and voltage of a circuit containing only resistive elements at any time is only determined by the value of each power supply voltage and current in the circuit at that time, and has nothing to do with the power supply voltage and current before that time. So there is no transient process in this circuit. In a general circuit, there are inductance and capacitance elements, which can store energy. When the circuit changes ...

Claims

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Application Information

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IPC IPC(8): H02H7/26
CPCH02H7/268H02H7/263
Inventor 郭振威黄知超诸葛致李震
Owner GUILIN UNIV OF ELECTRONIC TECH
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