Punch switch device intelligent control system with wide-area synchronous measurement function

Abstract

The invention discloses a punch switch device intelligent control system with a wide-area synchronous measurement function. The punch switch device intelligent control system with the wide-area synchronous measurement function comprises a switch cabinet control system and a plurality of switch devices, wherein the switch devices independently controls terminal devices or feed terminal devices andare communicated with one another; the switch cabinet control system comprises function expansion modules, which are connected to a master control module through an internal bus and precise clock signal wires; the switch devices are connected with the master control module through a photoelectric isolation field bus; the switch cabinet control system is connected with an upper power distribution master station system through the master control module, and the master control module is connected with a power module and a positioning module. The punch switch device intelligent control system withthe wide-area synchronous measurement function simplifies internal inter-communication structures, achieves function expansion abilities, greatly reduces the number of wire-core connection of the switch devices and meets the demands of intelligent power grids on equipment communication capability.

Description

technical field [0001] The invention relates to a control system for a switch cabinet, in particular to an intelligent controller for a switch cabinet. Background technique [0002] With the rapid development of my country's national economy and the rapid expansion of living materials, the current status of social production has higher and higher requirements for the quality of power transmission and distribution. Medium-voltage primary equipment represented by ring main unit, pole-mounted circuit breaker, and pole-mounted load switch, and secondary measurement and control equipment represented by DTU, FTU, TTU, and RTU have been widely used in medium-voltage distribution network automation solutions , but after a period of operation practice, this distribution network automation solution based on the combination of primary and secondary equipment also exposed some new problems that need to be solved urgently, mainly including: [0003] There are many hidden dangers in the ...

AI Technical Summary

Problems solved by technology

[0003] There are many hidden dangers in the separate design and assembly of primary and secondary equipment

Since the primary and secondary equipment are designed and manufactured by different manufacturers and then combined, installed and debugged at the user end, there are common problems that the primary and secondary equipment do not match due to reasons such as service life, interface incompatibility, and wiring redundancy. After the accident, the source of the fault cannot be efficiently checked, so that the responsibility for the accident cannot be divided in time, and the fault repair period is long

[0004] Secondary equipment has made slower progress in monitoring and management functions

At present, the time reference of the switchgear is realized by the clock synchronization method of the master station, but because the time synchronization is realized through the communication command method, there is a large transmission delay and time synchronization error, resulting in a change in the system state, the action sequence record of the associated switch It does not match the reality, especially reflected in the remote signaling jitter of the remote signaling data

[0006] The distribution network topology is complex, and its fault location has always been a difficult point

In the past, the manual line troubleshooting method was heavy and time-consuming, and the power supply could not be restored in a short period of time.

At present, fault location methods based on transient traveling waves have strong adaptability and high positioning accuracy, but for more complex distribution network structures, the calculation errors of traditional single-ended and double-ended traveling wave location methods will significantly affect The reliability of the positioning results. Although the traditional multi-terminal traveling wave positioning method has strong applicability and does not have the problem of false fault points, it still needs complex matrix calculations and is difficult to apply effectively.

[0007] In order to solve the above-mentioned problems of the 10 kV power distribution network, under the leadership of the State Grid, the formulation and implementation of policies and technical specifications related to the deep integration of the primary and secondary equipment of the medium-voltage distribution network are being actively promoted, but the relevant domestic products are not yet able to At the same time meet the above functional requirements

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