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System for testing oscillating and fault in relaying protection device based on DSP and distinguishing method thereof

A relay protection device and detection system technology, which is applied in the direction of emergency protection circuit devices, fault locations, electrical components, etc., can solve problems such as mathematical operations and less data volume, achieve wide application prospects, prevent malfunctions, and improve detection efficiency Effects of Speed ​​and Accuracy

Inactive Publication Date: 2006-06-14
TIANJIN UNIVERSITY OF TECHNOLOGY
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AI Technical Summary

Problems solved by technology

At present, most of the test systems of domestic oscillation locking devices use single-chip microcomputers or computers for mathematical operations. Due to the influence of their computing speed, the amount of data calculated by the detection device is relatively small or complex mathematical operations cannot be performed although the amount of data is large.

Method used

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  • System for testing oscillating and fault in relaying protection device based on DSP and distinguishing method thereof
  • System for testing oscillating and fault in relaying protection device based on DSP and distinguishing method thereof
  • System for testing oscillating and fault in relaying protection device based on DSP and distinguishing method thereof

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Embodiment approach

[0019] Implementation method: a fault and oscillation detection system and its distinguishing method in a DSP-based relay protection device (see figure 1 ), is characterized in that it comprises two parts of hardware device and relevant software programming, and said hardware part is made up of data acquisition conversion module, A / D conversion module, DSP signal processing module and switch control module, said data acquisition The output end of the conversion module is connected to the A / D conversion module to output to the DSP signal processing module, and the output of the DSP signal processing module is connected to the control switch module, and the output signal controls the action of the oscillation blocking device in the relay protection device.

[0020] The above-mentioned data acquisition conversion module (see figure 2 ) By connecting a differential circuit in the circuit, the current signal in the circuit is converted into a voltage signal by connecting a resisto...

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Abstract

This invention relates to a fault and oscillation test system and its differentiation method in a DSP relay protection device, which utilizes a high performance digital signal process chip to realize the division of the states of fault and oscillation by a new differentiation method to differentiate the states of fault and oscillation and fault during oscillation period to avoid error action.

Description

(1) Technical field: [0001] The invention belongs to the field of relay protection devices for power systems, in particular to a fault and oscillation detection system and a distinguishing method in a DSP-based relay protection device capable of correctly distinguishing oscillation and fault states to ensure the correct action of the relay protection device. (two) background technology: [0002] The relay protection device is an important part of the power system and one of the important measures to ensure the safe operation of the power system. In the modern power system, it is an indispensable part to maintain the normal operation of the system. Its correct action is of great significance to the safe operation of power equipment and the stability of the power grid. Power system oscillation refers to the phenomenon of large-scale periodic changes in the power angle between parallel-operated power systems or power plants, which belongs to an abnormal working condition of the...

Claims

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Application Information

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IPC IPC(8): H02H7/22G01R31/08H02H7/26
Inventor 马幼捷周雪松顾亚琴高庆雨陈洁
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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