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Relay protection online safety margin evaluation system

A safety margin and relay protection technology, applied in the field of relay protection online safety margin evaluation system, can solve the problem of not considering the power flow, etc., to achieve the effect of less difficulty in maintenance, and the accuracy of avoidance is affected by the power flow of the power grid

Active Publication Date: 2016-07-06
STATE GRID CORP OF CHINA +4
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although the online setting and online checking technology of relay protection takes into account the current operation mode of the power grid, the setting and checking calculations are still based on the results of steady-state short-circuit current calculations like offline calculations, and do not consider the influence of power flow

Method used

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  • Relay protection online safety margin evaluation system
  • Relay protection online safety margin evaluation system
  • Relay protection online safety margin evaluation system

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Embodiment Construction

[0041] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0042] like figure 1 shown, figure 1 The deployment scenario diagram of the relay protection online safety margin evaluation system in this embodiment is shown; the master station terminal equipment is deployed in the dispatch center or the centralized control center, and is used for the relay protection online safety margin evaluation.

[0043] The substation-side equipment is deployed in the substation for online safety margin evaluation of relay protection.

[0044] like figure 2 shown, figure 2 This is a schematic diagram of the overall structure of the master station software in this embodiment; the master station terminal equipment includes a protection safety margin evaluation module, a data acquisition and processing module, a human-computer interaction module and a public data area.

[0045] The protection safety margi...

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Abstract

The invention provides a relay protection online safety margin evaluation system. The system includes a master station end device installed in a dispatch center and a plurality of sub-station end devices installed in a transformer substation; the master station end device and the sub-station end devices are used for relay protection online safety margin evaluation; the master station end device includes a protection safety margin evaluation module, a data acquisition and processing module, a human-computer interaction module and a public data area; and each sub-station end device includes a protection safety margin evaluation sub module, a data acquisition and processing sub module, a human-computer interaction sub module and a public data sub area. Compared with relay protection online setting or online check, the system can accurately judge whether a protection constant value meets the requirements of the current operation mode of a power grid for protection selectivity and sensitivity and can assist in effectively eliminating the defect that the accuracy of relay protection online setting and online check results is influenced by the accuracy of power grid power flow, power grid parameters and a short-circuiting calculation model.

Description

technical field [0001] The invention relates to a system in the technical field of power system relay protection, in particular to an online safety margin evaluation system for relay protection. Background technique [0002] Relay protection is one of the most important secondary equipment in the power system, and it is the guarantee for the safe operation of the power system. Whether the relay protection device can meet the "four properties" requirements proposed by the power grid depends largely on whether the relay protection setting is reasonable. At present, the relay protection settings are all set in the offline state and remain unchanged during system operation. However, the operation mode of the power system is constantly changing in actual operation. When the power grid is in some special operating state due to equipment maintenance, new project commissioning and power grid accident, some of the fixed values ​​may not meet the requirements of selectivity and sensi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02J13/00
CPCY02E60/00Y04S10/16Y04S10/20
Inventor 李仲青胡炎高翔梁辰李伟黄毅
Owner STATE GRID CORP OF CHINA
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