Control circuit of protective-relay device and operating method thereof

A relay protection device and control circuit technology, applied in emergency protection circuit devices, computer control, general control systems, etc., to achieve the effects of high real-time control precision, simple hardware circuit, and enhanced stability

Inactive Publication Date: 2008-07-23
TIANJIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the control circuit in the traditional relay protection device has been difficult to meet the performance requirements of modern industry. People are eager for a new

Method used

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  • Control circuit of protective-relay device and operating method thereof
  • Control circuit of protective-relay device and operating method thereof

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Experimental program
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Embodiment Construction

[0026] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0027] Fig. 1 is a connection block diagram of the control circuit of the present invention.

[0028] As shown in Figure 1, a control circuit of a relay protection device, the control circuit includes: a central data processor module 1, an analog data acquisition module 4, an input and output interface module 5, a communication module 2, and a power supply module 6 and a keyboard display module 3; the input end of the analog data acquisition module 4 is connected to the voltage measurement signal 15a and the current measurement signal 15b of the power system, and the output end of the analog data acquisition module 4 is connected to the input end of the central data processing module 1; The output end of the input and output interface module 5 is bidirectionally connected to the central data processor module 1, and the input end of the input and output i...

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Abstract

The invention discloses a control circuit of a relay protection device and a method for operation, wherein the control circuit comprises a center data processor module, an analog quantity data collection module, an opening-inserting opening-excluding interface module, a communication module, a power module and a keyboard display module. The operation method comprises the following steps: 1) signal gathering stage, 2) signal deforming and changing stage, 3) timely sampling time counter setting stage, 4) electric net instantaneous parameter calculating stage, 5) current condition detecting stage, 6) the center data process module judges and controls a relay protection device breaking stage. The beneficial effect of the invention is characterized by utilizing digital signal process chip to realize relay protection movement control, improving relay protection reliability and rapidness, overcoming control lag and movement and non-timely defect induced by programmable logic control technique and common single-set chip process speed limit, having good adjustability and reliability and reducing the probability of production halt due to relay protection false operation or rejection.

Description

technical field [0001] The invention relates to a relay protection device in a power system, in particular to a control circuit of the relay protection device and an operation method thereof. Background technique [0002] The main task of power system relay protection is to selectively cut off the fault line in the shortest possible time when the power system fails. A general relay protection device is composed of three parts: a measurement comparison element, a logic judgment element and an execution output element. At present, in order to adapt to the rapid development of the electric power industry, so that the power grid can continuously, safely and reliably provide users with high-quality electric energy, digital relay protection control technology is more and more used in actual operations, thereby improving the relay protection. All aspects of performance of the protective device. [0003] In the relay protection device, the most critical link is the extraction and ...

Claims

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Application Information

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IPC IPC(8): H02H7/22H02H7/26G05B15/02
Inventor 周雪松李显冰马幼捷王新志张继东尹向前
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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