Comprehensive power distribution terminal of power distribution network

Abstract

The invention relates to a comprehensive power distribution terminal of a power distribution network. The terminal comprises a feeder line acquisition control unit, a synchronous phasor acquisition unit, a power quality monitoring unit, an Ethernet switching unit, a centralized data processing unit and a clock synchronization unit, wherein the clock synchronization unit is connected with the centralized data processing unit, the feeder line acquisition control unit, the synchronous phasor acquisition unit and the power quality monitoring unit for time checking; the Ethernet switching unit is connected with the centralized data processing unit via an Ethernet port; the feeder line acquisition control unit, the synchronous phasor acquisition unit and the power quality monitoring unit are connected with the Ethernet switching unit for Ethernet communication; and the feeder line acquisition control unit and the power quality monitoring unit are connected with the synchronous phasor acquisition unit via an SPI (serial peripheral interface) for SPI communication. The terminal can achieve synchronous acquisition of data of all nodes of the power distribution network, monitoring and data acquisition of power distribution network equipment and on-line power quality monitoring.

Description

technical field [0001] The invention relates to the field of distribution network automation, in particular to an integrated power distribution terminal of a distribution network. Background technique [0002] Distribution network automation terminal is the basic link to realize distribution automation. It generally refers to feeder terminal equipment (FTU) for distribution network monitoring, distribution transformer distribution terminal (TTU), remote monitoring terminal for switchgear and ring main unit (DTU). Its main function is to realize the monitoring and data collection of distribution network equipment, and has the functions of remote signaling, telemetry, remote control, fault current detection, communication forwarding and fault diagnosis, isolation, positioning and recovery. Although the distribution network automation terminal has begun to play an important role in the smart distribution network, there are still many problems that need to be solved urgently. ...

AI Technical Summary

Problems solved by technology

[0003] Among them, the traditional distribution automation (remote) terminal has problems such as excessive data delay, insufficient boundary measurement, and inaccurate component parameters, which make the state estimation accuracy and real-time performance of the distribution network encounter great challenges.

At the same time, traditional power distribution automation remote terminals can only provide steady-state, asynchronous grid time-segment surface data, making it impossible for the upper sub-station or the central master station to grasp the dynamic information of the system in time and take measures

In addition, due to the limited accuracy of measurement data and inconsistent time scales of traditional power distribution automation remote terminals, a large amount of redundant measurement data can only be used to obtain the state of the power system by solving nonlinear equations. The calculation time is relatively long, the real-time performance is poor, and it cannot Applied to the analysis of transient processes

In addition, the traditional distribution network automation terminal cannot realize the power quality monitoring function

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