Distribution area outgoing branch line switch voltage alarm device

Abstract

The invention discloses a distribution area outgoing branch line switch voltage alarm device. The distribution area outgoing branch line switch branch is connected with the primary side of a voltage transformer. The secondary side of the voltage transformer is connected with the input end of a voltage operational amplifier circuit. The output end of the voltage operational amplifier circuit is connected with a microprocessor through an A / D conversion module. The microprocessor is connected with the distribution area background through a communication module. The microprocessor is bidirectionally connected with a power supply control module. The output end of the power supply control module is connected with a power supply. The microprocessor is also connected with the input end of an outgoing control module. The output end of the outgoing control module is connected with the branch switch. According to the technical scheme, the load status of each branch line of the distribution area outgoing line switch is monitored in real time, and an alarm signal is provided when the branch load exceeds the set threshold value so that the operation and maintenance personnel are enabled to reasonably distribute the branch load.

Description

technical field [0001] The invention relates to the field of electric power equipment, in particular to a voltage alarm device for branch line switches of outgoing lines in a distribution station area. Background technique [0002] Most of my country's low-voltage distribution network supplies power to users through 10kV / 0.4kV transformers in a three-phase four-wire system. It is a power supply network that mixes three-phase production power and single-phase load power. Due to the vast coverage area of ​​my country's low-voltage distribution network, different operating environments, numerous and scattered power users, there are a large number of single-phase loads with unbalanced spatio-temporal distribution. Differences in electricity consumption habits of residents and strong randomness of loads will also cause excessive branch loads and unbalanced three-phase loads. The electricity load cannot be evenly distributed to each phase, which is the main reason for the three-p...

AI Technical Summary

Problems solved by technology

The whole process is labor-intensive and time-consuming, and the timeliness is extremely low, resulting in a lag in load adjustment and poor pertinence;

[0004] 2. At present, most distribution sub-areas are only equipped with load monitoring devices on the low-voltage side of distribution transformers. For the load status of each branch line of the outlet branch line switch in the distribution sub-area, due to the complex operation conditions on site and the lack of attention paid to it in the early stage, there is currently no effective monitoring device. The load monitoring method of the branch line makes it impossible to grasp the operation status of the branch load in real time;

[0005] 3. Most of the current distribution network monitoring data exists in the form of paper or electronic documents, and no effective database has been formed. A large amount of original data and basic data are scattered in grassroots units, without statistics and analysis, and the processing speed of manual statistical data is too slow

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