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Intelligent remote automatic reclosing lock controller

An automatic reclosing and controller technology, applied in the electric power field, can solve the problems that the reclosing is difficult to achieve intelligent control, the power supply radius is long, and the probability of instantaneous failure is high, and it achieves the effect of automatic detection and control, simple structure, and reduced workload.

Inactive Publication Date: 2014-11-19
CHENGDU XINXIN INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the faults of overhead lines are instantaneous. After the relay protection action cuts off the short-circuit fault, the arc will be automatically extinguished. In most cases, the insulation at the short-circuit can be restored automatically. However, due to the scattered load of the transmission line, the power supply radius is long , the line maintenance workload is heavy, especially the overhead power distribution lines should be affected by external forces such as lightning strikes, bird damage, strong winds and trees, resulting in a high probability of instantaneous failure and poor power supply reliability. Therefore, automatically reclosing the circuit breaker can not only improve the reliability of power supply Responsibility, reduce power failure losses, and improve the transient stability level of the power system
Traditional equipment lacks automatic detection and control functions, making it difficult to realize intelligent control of reclosing

Method used

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  • Intelligent remote automatic reclosing lock controller

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Experimental program
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Effect test

Embodiment 1

[0015] Such as figure 1 As shown, the intelligent remote automatic reclosing controller is mainly composed of a current sensor, a filter amplifier circuit, an A / D converter, a microcontroller, and an output controller connected in sequence, and the output controller is connected to the reclosing switch , the microcontroller is also connected with the proximity switch sensor, and the proximity switch sensor is connected with the reclosing switch. The microcontroller is connected with the monitoring center through a communication device, the communication device is MAX1480, and the microcontroller is connected with the communication device through an RS485 interface. The current sensor sends the sampling signal to the filter amplifier circuit for filtering and signal amplification, and then sends it to the A / D converter for analog-to-digital conversion. After the microcontroller obtains the digital signal, it sends the signal to the monitoring center remotely through the communi...

Embodiment 2

[0017] In order to better realize the present invention, on the basis of Embodiment 1, this embodiment further limits that the microcontroller is selected as 89C51 single-chip microcomputer. The microcontroller is also connected with a keyboard and a display. 89C51 is a low-voltage, high-performance CMOS 8-bit microprocessor with 4K bytes flashing programmable erasable read-only memory, commonly known as single-chip microcomputer. The erasable read-only memory of the single-chip microcomputer can be repeatedly erased 100 times. The device is fabricated using ATMEL's high-density nonvolatile memory manufacturing technology and is compatible with the industry-standard MCS-51 instruction set and output pins. ATMEL's 89C51 is a high-efficiency microcontroller due to the combination of a versatile 8-bit CPU and flash memory in a single chip. The microcontroller sends the reclosing switch signal to the display for display, which is checked by the on-site staff, and at the same tim...

Embodiment 3

[0019] In order to better realize the present invention, on the basis of Embodiment 1, this embodiment further restricts the selection of relays for the output controller. The relay is an electric control device, which is an electrical appliance that causes the controlled quantity to undergo a predetermined step change in the electrical output circuit when the change of the input quantity (excitation quantity) meets the specified requirements. It has an interactive relationship between the control system and the controlled system. Usually used in automatic control circuits, it is actually an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit. Other parts of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

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Abstract

The invention discloses an intelligent remote automatic reclosing lock controller. The intelligent remote automatic reclosing lock controller mainly comprises a current sensor, a filter amplifier circuit, an A / D (analog / digital) converter, a microcontroller and an output controller which are sequentially connected, wherein the output controller is connected with a reclosing switch; the microcontroller is connected with a proximity switch sensor; the proximity switch sensor is connected with the reclosing switch; the microcontroller is connected with a monitoring center through a communication device; the communication device uses MAX1480; the microcontroller is connected with the communication device through an RS485 interface. The intelligent remote automatic reclosing lock controller is simple in structure; in the system, a closed-loop feedback loop capable of automatic detection is designed, so that automatic detection and control can be achieved; at the same time, the remote communication device is arranged for remote control over the reclosing switch, so that the workload of working staff is reduced.

Description

technical field [0001] The invention relates to the field of electric power, in particular to an intelligent remote automatic reclosing controller. Background technique [0002] The automatic reclosing device is an automatic device that automatically switches on the circuit breaker after tripping due to a fault. Most of the faults of overhead lines are instantaneous. After the relay protection action cuts off the short-circuit fault, the arc will be automatically extinguished. In most cases, the insulation at the short-circuit can be restored automatically. However, due to the scattered load of the transmission line, the power supply radius is long , the line maintenance workload is heavy, especially the overhead power distribution lines should be affected by external forces such as lightning strikes, bird damage, strong winds and trees, resulting in a high probability of instantaneous failure and poor power supply reliability. Therefore, automatically reclosing the circuit ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/06
Inventor 李凌
Owner CHENGDU XINXIN INFORMATION TECH