Feeder terminal and line protection device

Abstract

The invention provides a feeder terminal and line protection device, and the device comprises a power module which is connected with a dual-core heterogeneous processor and is used for supplying powerto the dual-core heterogeneous processor; a mutual inductor which is installed on a power distribution network line and collects analog quantity of line operation parameters, wherein the AD collection module converts the analog quantity of the operation parameters into digital quantity; the dual-core heterogeneous processor which analyzes and calculates the operation parameters of the received line to obtain the data of the line, judges whether the line has a fault or not, and sends a switching-off action command signal to the circuit breaker through the data transmission module if the line has the fault, so as to control the circuit breaker to disconnect the faulted line; and a wireless communication module which sends the operation parameters acquired by the dual-core heterogeneous processor, the calculation line data and the judged fault line to a cloud service platform and a user terminal. The distribution network automatic control device combining the high-speed sampling chip andthe high-speed processor control chip is adopted, so the device can complete the protection and monitoring of a distribution network line rapidly and stably.

Description

Technical field [0001] The invention relates to the technical field of power distribution network line protection, in particular to a feeder terminal and a line protection device. Background technique [0002] Existing grid fault detection basically detects the fault signal of the current terminal single point for fault judgment. In the actual operation of the power grid, some faults often affect the operation of non-faulty lines, such as ground faults. On a relatively close faulted line and a non-faulty line, when a ground fault occurs on one line, an adjacent non-faulty line will also produce abnormal zero-sequence current, resulting in a normal line fault trip. [0003] At present, the feeder protection terminals that are widely used in the power market require more and more complex requirements, high real-time data collection, faster and faster speeds, more and more complex communication protocols, more and more compact size requirements, and existing products are common The f...

AI Technical Summary

Problems solved by technology

[0005] 1. The volume of the circuit board is too large, and the wiring of the circuit board is relatively complicated

[0006] 2. Two sets of hardware systems run on one circuit board at the same time, and an additional single-chip microcomputer system is added, which increases failure points and increases production costs

[0007] 3. In terms of software, two sets of programs need to be written, which makes it difficult to upgrade and maintain

[0008] 4. It is necessary to increase the communication and synchronization mechanism between the two systems, and additionally increase the MCU load

Images