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On-site relay protection system

A relay protection and protection device technology, applied in information technology support systems, electrical components, circuit devices, etc., can solve the problems of reduced reliability, large number of optical fibers, and large heat generation of intelligent terminal devices, so as to achieve convenient operation and maintenance, The effect of saving optical fiber and reducing the cost of relay protection

Active Publication Date: 2017-03-22
STATE GRID CORP OF CHINA +3
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AI Technical Summary

Problems solved by technology

[0003] The structure of the existing digital substation has the following shortcomings in actual use: the merging unit installed in the local cabinet, the intelligent terminal device generates a lot of heat, and the number of optical fibers is large, resulting in a decrease in reliability

Method used

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Embodiment Construction

[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0026] Such as figure 1 As shown, the super acquisition unit for transformer sampling is used in digital substations, and the combination of main control room + local cabinet is adopted. The local cabinet is equipped with a field programmable gate array FPGA, and the FPGA is connected with gigabit optical modules 1 to 4, B-code optical fiber serial communication interface (B-code optical string) and a single-chip microcomputer, and the FPGA is connected with a line protection device (line Protection) current and voltage acquisition unit CT / PT (CT / PT 1#), bus differential protection subunit (Bus Differential Protection SubUnit, bus differential subunit) current and voltage acquisition unit CT / PT (CT / PT 2#) , the line interval and the current and voltage acquisition unit CT / PT (CT / PT 3#) of the merging unit (merging unit) on the high-voltage si...

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Abstract

The invention discloses an on-site relay protection system, and aims at solving the technical problem of improving the reliability of a digital substation. The on-site relay protection system is provided with a single-space protection device, a cross-space protection device and a measurement and control automation device, wherein the single-space protection device is arranged on site; the cross-space protection device and the measurement and control automation device are arranged in a master control room of the digital substation; and the single-space protection device communicates with the master control room through an optical fiber of hundreds of megabytes. Compared with the prior art, the on-site relay protection system has the advantages that the single-space protection device communicates with the master control room through the optical fiber, so that a lot of cables are saved, one part of optical fiber is saved, the on-site arranged system is terminated in an outdoor cabinet for installation, wiring and connection are facilitated, a device with high heat is arranged outside the outdoor cabinet, direct and natural heat dissipation is carried out through a housing of the device, the heat emitted from the outdoor cabinet is reduced, an air conditioner is not needed, the relay protection cost is reduced, the reliability of the system is improved and operation and maintenance are facilitated.

Description

technical field [0001] The invention relates to a power system protection system, in particular to a digital substation relay protection system. Background technique [0002] The existing digital substation has the following two structural modes: 1. Digital merging unit + intelligent terminal + pure digital protection device (sampling value SV and general object-oriented substation event Goose trip), 2. Traditional sampling merging unit + Intelligent terminal + pure digital protection device. On-site application mainly adopts the combination of main control room + on-site cabinet. The main control room is equipped with protection devices, and the on-site cabinet is installed with merging units and intelligent terminals. The main control room is similar to the power room. The IP protection level of the main control room (INGRESS PROTECTION protection level system) is not demanding, generally IP20 is enough, and the working environment is required not to exceed 55°C. The loc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00
CPCH02J13/00019Y02E60/00Y04S10/16
Inventor 郑玉成黄长伟王乾刚孔德深杨晨
Owner STATE GRID CORP OF CHINA
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