An easy-to-deploy relay protection device for distribution network
A relay protection device and distribution network technology, applied in emergency protection circuit devices, overcurrent protection, electrical components, etc., can solve the problems of inconvenient deployment and consumption of multiple cables
Active Publication Date: 2021-04-09
国网浙江武义县供电有限公司 +1
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Problems solved by technology
Connecting both the incoming current transformer and the outgoing current transformer to the protection device of the integrated station requires a lot of cables, which is inconvenient to deploy
Method used
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Embodiment 1
[0023] An easy-to-deploy distribution network relay protection device, suitable for relay protection of single-power non-ring network radial distribution lines, deployed at the beginning of each distribution branch 300, such as figure 1 As shown, this embodiment includes a circuit breaking controller 103, a circuit breaking device 101, a current transformer 102, a wireless communication module 400, a memory 600, an MCU and a controllable switch K, and the current transformer 102 and the circuit breaking device 101 are connected in series to the power distribution branch circuit 300, the current transformer 102 is coupled with the live wire of the power distribution branch 300, the first output end of the current transformer 102 is connected to the second end of the controllable switch K, the first end of the controllable switch K and the second end of the current transformer 102 are connected to The input terminal of the circuit breaker 103 is connected, the output terminal of ...
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The invention relates to the technical field of power distribution protection, in particular to a distribution network relay protection device that is easy to deploy, including a circuit breaker controller, a circuit breaker, a current transformer, a wireless communication module, a memory, an MCU, and a controllable switch K. The transformer is coupled to the live wire of the power distribution branch, the first output terminal of the current transformer is connected to the second terminal of the controllable switch K, the controllable switch K and the current transformer are connected to the circuit breaker controller, and the circuit breaker controller is connected to the circuit breaker , the positive pole and the negative pole of the power supply terminal of the wireless communication module are respectively connected to the input terminal and the output terminal of the circuit breaker, and the topological relationship table of the power distribution branch is stored in the memory. The substantive effect of the present invention is: the wireless communication module receives the fault current information sent by the next-level power distribution branch circuit, can quickly locate the position of the fault current, and avoids the action of the relay protection device of the upper-level branch circuit, causing the expansion of the accident.
Description
technical field [0001] The invention relates to the technical field of power distribution protection, in particular to a distribution network relay protection device that is easy to deploy. Background technique [0002] For single-power non-ring network radial distribution lines, when a sudden fault current occurs in the distribution branch circuit, when the setting current of the relay protection device is set to a smaller value, the faulty line can be quickly cut off. However, when the setting current of the relay protection device is small, it will cause the expansion of the fault, which is not conducive to the stable operation of the power grid. Therefore, at present, three-stage overcurrent protection is mostly used in power grid wiring. Three-stage overcurrent protection can better balance the contradiction between fast fault removal and prevention of fault expansion, that is, it has the advantages of fast response and good selectivity at the same time. However, when i...
Claims
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IPC IPC(8): H02H7/26H02H3/08
CPCH02H3/08H02H7/26
Inventor 林军蒋红亮林振杜浩良徐峰何瑞兵陈申华王申华曹保良汤建人朱杭杰陈占杰
Owner 国网浙江武义县供电有限公司