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Fast and intelligent 10KV pole-mounted breaker

A technology of pole-mounted circuit breaker and intelligent controller, which is applied to high-voltage air circuit breakers, circuits, emergency protection circuit devices, etc. problems, to achieve the effect of easy installation and maintenance, improved maintenance efficiency, and excellent electrical insulation performance

Inactive Publication Date: 2013-09-25
SHENZHEN JINBOLIAN ELECTRIC POWER TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, medium and high voltage circuit breakers have a low degree of intelligence, and traditional circuit breakers have many shortcomings, which cannot meet the needs of the development of intelligent distribution networks.

Method used

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  • Fast and intelligent 10KV pole-mounted breaker
  • Fast and intelligent 10KV pole-mounted breaker
  • Fast and intelligent 10KV pole-mounted breaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Embodiment 1: The CPU module monitors the running state of the line, and starts a protection action or sends out an alarm message according to the calculation result. The data acquisition module collects three-phase voltage, three-phase current and zero-sequence current, performs A / D conversion, and sends digital signals to the CPU module. The power management module converts the input AC (PT or CT) or DC (solar power supply) into DC 12V to provide system power; it manages the charging and discharging of batteries and energy storage capacitors. The permanent magnet drive circuit module drives the coil to perform corresponding actions according to the opening and closing instructions of the processor. The communication interface module provides Ethernet port and serial port, supports optical port and electrical port connection, and integrates GPRS module for receiving external instructions or sending local data.

Embodiment 2

[0038] Embodiment 2: The intelligent controller is based on a high-speed DSP, adopts a half-cycle sliding window FFT algorithm, can provide a protection outlet signal within a half-cycle, and combines a permanent magnet mechanism to cut and isolate line faults within 25ms; in order to eliminate In order to avoid the influence of inrush current, the comprehensive use of signal feature comparison and digital filtering technology eliminates the misoperation caused by instantaneous interference. For the inrush signal, according to various phenomena (such as: lightning, load changes, etc.), extract signal features (such as: amplitude, frequency, duration, etc.), and establish a feature comparison library. The CPU module first filters the sampled signal, and then calculates it quickly; if it is judged that the line is faulty, it further extracts the signal feature and compares it with the signal feature library to eliminate the influence of the inrush current and improve the correctn...

Embodiment 3

[0039] Embodiment 3: The intelligent controller provides relay protection functions such as current three-stage protection, single-phase grounding protection, and low-voltage blocking, which can realize fault isolation and fault location; especially for small current grounding faults, by calculating and comparing the characteristic frequency band The magnitude of the internal transient zero-sequence current component can effectively determine the fault line.

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Abstract

The invention discloses a fast and intelligent 10KV pole-mounted breaker. The fast and intelligent 10KV pole-mounted breaker is composed of a breaker body and an intelligent control box which are connected through multicore shield cables, an epoxy resin embedded pole is adopted, and the fast and intelligent 10KV pole-mounted breaker is good in weather resistance and ageing resistant, prevents ultraviolet light, and is high in strength and good in electrical insulation performance. Small-scale integrated design is adopted, a current transformer and a voltage transformer are integrated in the pole, the structure is compact, and mounting and maintenance are easy. A high-speed algorithm is adopted, exit protecting signals can be provided in 10ms, the fast mechanical property of a permanent magnetic mechanism is combined, and a line fault is removed and isolated in 25ms. A single-phase earth fault (including low current earthing) detecting function is achieved. The technology of self-diagnosis of the running state and the mechanical property of the breaker is achieved, and maintenance efficiency is improved. A low-power design technology is adopted, solar energy and CT are utilized to supply power and are mutually supplemented, an external power source is not needed, and the power-driven operation can be achieved. The fast and intelligent 10KV pole-mounted breaker is provided with an Ethernet port, and an IEC61850 specification interface is provided.

Description

technical field [0001] The invention belongs to the field of intelligent electrical appliances, and in particular relates to a 10KV fast intelligent pole-mounted circuit breaker. Background technique [0002] At present, medium and high voltage circuit breakers have a low degree of intelligence, and traditional circuit breakers have many shortcomings, which cannot meet the needs of the development of intelligent distribution networks. [0003] Compared with the traditional circuit breaker, the intelligent circuit breaker not only has the function of setting parameters such as overload long delay, short circuit short delay, instantaneous action protection, single-phase grounding protection, load monitoring protection, etc., but also has a measurement display function . The measured data can be displayed locally or transmitted to the host computer for display. The self-diagnosis function can realize the detection of the circuit breaker's operating status and the communication...

Claims

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Application Information

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IPC IPC(8): H01H71/00H01H33/66H02H7/26
Inventor 王建强
Owner SHENZHEN JINBOLIAN ELECTRIC POWER TECH
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