Distribution network terminal passive power-obtaining system
An electrical system and distribution network technology, applied in the field of distribution network, can solve the problems of inability to obtain electricity, large size of distribution network terminals, and inability to monitor the time of power exhaustion when the terminal equipment is replaced as a whole, so as to avoid maintenance work. Effect
Active Publication Date: 2015-04-29
ZHUHAI XJ ELECTRIC +2
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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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[0013] Reference figure 1 , A passive power taking system for a distribution network terminal of the present invention includes a current transformer 1, a rectifier module 2, a voltage doubler power conversion module 3, a control module 4, a current acquisition loop 5, and the like. The system of the present invention does not need to be equipped with a backup battery, and can reliably supply power to the second remote or terminal equipment with a fault protection function of the distribution line.
[0014] The current transformer 1 is connected to the power line and is used for passively taking power on the power line. The input end of the rectifier module 2 is connected to the output end of the current transformer 1 and is used to convert the alternating current generated on the current transformer 1 into direct current.
[0015] The input end of the voltage doubler power conversion module 3 is connected to the output end of the rectifier module 2, and is used to convert the dir...
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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 power distribution network technology, and specifically relates to a passive power taking system for a terminal of a power distribution network. Background technique [0002] Existing power distribution network terminals, especially pole-mounted terminals, are installed outdoors, and it is impossible to use ordinary mains power supply. Therefore, power acquisition can basically be divided into the following two methods: One is the use of voltage transformers, that is, TV. Electricity; the other is to use the primary power TA as the main power source. [0003] The TV power taking method uses outdoor voltage transformer equipment to directly convert the 10KV line voltage into 220V or 110V AC voltage for the terminal use of the distribution network. Outdoor voltage transformers are expensive, heavy installation and maintenance workloads, are greatly affected by environmental humidity and temperature factors, are prone to aging and damag...
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IPC IPC(8): H02M7/21H02J9/06
Inventor 王焕文贾其领张源恕
Owner ZHUHAI XJ ELECTRIC