Distribution network terminal passive power-obtaining system

Abstract

The invention belongs to a distribution network technology, and discloses a distribution network terminal passive power-obtaining system which comprises a current transformer, a rectification module, a dual voltage type electric power transformation module and a control module. The distribution network terminal passive power-obtaining system provided by the invention adopts a dual voltage power conversion manner after rectification to obtain power, insures that power can be obtained when a primary line current is lower, still can output at least more than 0.5 W power when a primary current is lower than 6 A, does not need to be provided with a backup battery, and can omit the maintenance work of the backup battery; and the control module collects a primary current signal through a current collecting loop so as to control the transformation procedure of the dual voltage type electric power transformation module, when the primary current is larger, the dual voltage type electric power transformation module can output appropriate power so as to be used by a distribution network terminal, and the purpose of no need of heat dissipation is basically achieved.

Description

technical field [0001] The invention belongs to the distribution network technology, and in particular relates to a passive power-taking system for a distribution network terminal. Background technique [0002] The existing distribution network terminal, especially the pole-mounted terminal, is installed outdoors, so it is impossible to use the power supply method of ordinary mains power. Therefore, the power supply can basically be divided into the following two ways: one is to use the voltage transformer, that is, TV to take The other way is to use one-time power-taking TA as the main power-taking method. [0003] The TV power acquisition method uses outdoor voltage transformer equipment to directly convert the 10KV line voltage into 220V or 110V AC voltage for distribution network terminals. Outdoor voltage transformers are expensive, require a lot of installation and maintenance work, are greatly affected by environmental humidity and temperature factors, are prone to a...

AI Technical Summary

Problems solved by technology

Its main disadvantages are: the output power is extremely low, and the terminal equipment needs to be replaced as a whole after the power of the one-time backup battery is exhausted, and the time of power exhaustion cannot be monitored. It cannot be applied to terminal equipment with two remotes or power distribution line fault protection functions

When adopting a scheme with a large power output power, when the primary line current is lower than 18A, it is basically impossible to take power, and when the line current exceeds 300A, the output power can reach more than 30W, which requires a larger radiator to dissipate heat. Reliable work, resulting in larger distribution network terminals

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