CN111313375A - Arc light protection equipment capable of rapidly extinguishing arc and method thereof - Google Patents
Arc light protection equipment capable of rapidly extinguishing arc and method thereof Download PDFInfo
- Publication number
- CN111313375A CN111313375A CN201811518341.2A CN201811518341A CN111313375A CN 111313375 A CN111313375 A CN 111313375A CN 201811518341 A CN201811518341 A CN 201811518341A CN 111313375 A CN111313375 A CN 111313375A
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- China
- Prior art keywords
- arc
- signal
- arc light
- protection device
- optical signal
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
- H02H1/0015—Using arc detectors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
Abstract
The invention relates to the technical fields of electric power, petrifaction, war industry, rail transit, industrial and mining systems and the like, in particular to arc light protection equipment capable of rapidly extinguishing arcs and a method thereof; the arc extinction device comprises an arc light probe, a photoelectric converter, a protection device and an arc extinction device; the electric arc light probe detects an electric arc light signal, the electric arc light signal is transmitted to the photoelectric converter through the transmission optical fiber, the photoelectric converter converts the electric arc light signal into an electric signal and transmits the electric signal to the protection device, the protection device performs protection logic processing on the electric signal, then sends a control signal, modulates the signal into an optical signal and transmits the optical signal to the arc extinguishing device through the communication optical fiber, the arc extinguishing device extinguishes the electric arc, and the light control technology is realized to extinguish the electric arc; the invention utilizes the light control technology to realize rapid arc extinction and reduce the loss caused by arc light faults to the minimum.
Description
Technical Field
The invention relates to the technical fields of electric power, petrifaction, war industry, rail transit, industrial and mining systems and the like, in particular to arc light protection equipment capable of rapidly extinguishing arcs and a method thereof.
Background
At present, in a power grid structure in China, bus protection is generally not installed in a bus system with a voltage level of 35KV or below, but the fault rate of a medium-low voltage bus is high due to the facts that outgoing lines on the medium-low voltage bus and a low-low voltage bus are more, operation is frequent, operating current is large, fault overvoltage is high, the distance between three-phase conductor lines and the distance between the three-phase conductor lines and the ground are closer, the medium-low voltage bus is easily damaged by small animals, equipment manufacturing quality is poorer than that of high-voltage equipment, operating conditions are poor, and human operation errors occur.
For many years, due to various reasons, the switch equipment is seriously burnt out and even develops into 'fire burning operation', so that a main transformer is damaged by external short-circuit current impact, and a major power grid accident is caused.
Disclosure of Invention
The invention mainly solves the technical problem of providing arc light protection equipment capable of quickly extinguishing arc, which transmits an arc light signal to a photoelectric converter after detecting the arc light signal through an arc light probe, converts the arc light signal into an electric signal by the photoelectric converter and transmits the electric signal to a protection device, then sends a control signal after the protection logic processing is carried out on the electric signal by the protection device, modulates the signal into an optical signal and transmits the optical signal to an arc extinguishing device, and extinguishes the arc through the arc extinguishing device to realize the arc extinguishing by a light control technology.
In order to solve the technical problems, the invention adopts a technical scheme that:
an arc light protection device capable of rapidly extinguishing arcs, which is connected with a switch cabinet, wherein the arc light protection device comprises:
the arc light probe is arranged in the switch cabinet and used for detecting an arc light signal;
the photoelectric converter is used for receiving the arc light signal transmitted by the arc light probe and converting the arc light signal into an electric signal;
the protection device is used for receiving the electric signal transmitted by the photoelectric converter and converting the electric signal into an optical signal;
and the arc extinguishing device is used for receiving the optical signal transmitted by the protection device and enabling the arc extinguishing device to work through the optical signal, and the moving contact and the fixed contact are quickly closed so as to extinguish arc light.
As an improvement of the present invention, the present invention further comprises:
the transmission optical fiber is used for transmitting the arc light signal transmitted by the arc light probe into the photoelectric converter;
and the communication optical fiber is used for transmitting the optical signal sent by the protection device to the arc extinguishing device.
As a further improvement of the invention, the method also comprises the following steps:
the current transformer is used for sending a three-phase electric signal to the protection device;
and the circuit breaker is electrically connected with the protection device.
As a further improvement of the present invention, the arc extinguishing device includes:
the controller is used for receiving the optical signal transmitted by the protection device, converting the optical signal into an electrical signal and controlling the capacitor to discharge through the electrical signal;
the capacitor is used for charging and discharging and is electrically connected with the controller;
the quick vacuum switch is used for controlling the movable contact and the fixed contact to be closed or opened;
wherein the capacitor is electrically connected with the rapid vacuum switch.
As a further improvement of the present invention, the arc extinguishing device further includes:
and the capacitor charging module is used for charging the capacitor.
As a further improvement of the present invention, an analysis module is disposed in the protection device for analyzing the electrical signal transmitted from the photoelectric converter and converting the electrical signal into an optical signal.
As a further improvement of the present invention, the optical signal is an analog optical signal or a digital optical signal.
As a further development of the invention, the photoelectric converter is integrated in the protective device.
An arc light protection method capable of rapidly extinguishing arc comprises the following steps:
step S1, the arc light probe detects an arc light signal and transmits the arc light signal to the photoelectric converter;
step S2, the photoelectric converter receives the arc light signal transmitted by the arc light probe, converts the arc light signal into an electric signal and transmits the electric signal to the protection device;
step S3, the protection device receives the electric signal transmitted by the photoelectric converter, performs protection logic processing, sends out a control signal, modulates the electric signal into an optical signal and transmits the optical signal to the arc extinguishing device through a communication optical fiber;
and step S4, the arc extinguishing device receives the optical signal transmitted by the protection device and starts to start up through the optical signal, so that the movable contact and the fixed contact are quickly closed, and the arc light is extinguished.
The invention has the beneficial effects that: compared with the prior art, the arc light probe detects an arc light signal, then transmits the arc light signal to the photoelectric converter, the photoelectric converter converts the arc light signal into an electric signal and transmits the electric signal to the protection device, the protection device performs protection logic processing on the electric signal and then sends out a control signal and modulates the signal into an optical signal and transmits the optical signal to the arc extinguishing device through the communication optical fiber, the arc extinguishing device extinguishes the arc, the light control technology is realized to extinguish the arc, and according to the protection requirement, a moving contact and a fixed contact can be quickly opened after receiving an opening command of the protection device, and the arc extinguishing device can be repeatedly used; the invention utilizes the light control technology to realize rapid arc extinction and reduce the loss caused by arc light faults to the minimum.
Drawings
FIG. 1 is a connection block diagram of a rapid quenching arc light protection device of the present invention;
FIG. 2 is a connection block diagram of a first embodiment of the arc light protection device capable of rapidly extinguishing arcs according to the present invention;
FIG. 3 is a block diagram of the internal connections of the arc extinguishing device of the present invention;
FIG. 4 is a block diagram of the steps of the arc light protection method of the present invention for rapid arc extinction;
fig. 5 is a block diagram of step S4 of the arc light protection method for rapidly extinguishing arcs according to the present invention.
Detailed Description
As shown in fig. 1, an arc light protection device capable of rapidly extinguishing an arc according to the present invention is connected to a switch cabinet, and includes:
the arc light probe is arranged at the position of the switch cabinet where arc light needs to be detected and is used for detecting an arc light signal;
the photoelectric converter is used for receiving the arc light signal transmitted by the arc light probe and converting the arc light signal into an electric signal;
the protection device is used for receiving the electric signal transmitted by the photoelectric converter, sending a control signal after the electric signal is processed by the protection logic and converting the signal into an optical signal; the protection device can also directly receive an arc light signal of the arc light probe;
and the arc extinguishing device is used for receiving the optical signal transmitted by the protection device and enabling the arc extinguishing device to work through the optical signal, so that the moving contact and the fixed contact are quickly closed, and arc light is extinguished.
Compared with the prior art, the arc light probe detects an arc light signal, the arc light signal is transmitted to the photoelectric converter, the photoelectric converter converts the arc light signal into an electric signal and transmits the electric signal to the protection device, the protection device performs protection logic processing on the electric signal and then sends out a control signal, the signal is modulated into an optical signal and is transmitted to the arc extinguishing device through the communication optical fiber, the arc extinguishing device extinguishes the arc, the light control technology is realized to extinguish the arc, and according to the protection requirement, the movable contact and the fixed contact can be quickly opened after receiving an opening command of the protection device, and the movable contact and the fixed contact can be repeatedly used. Further, the arc light protection device capable of rapidly extinguishing the arc further comprises: the transmission optical fiber is used for transmitting the arc light signal transmitted by the arc light probe into the photoelectric converter; the arc light signals transmitted by the arc light probe can also be directly transmitted to the protection device;
and the communication optical fiber is used for transmitting the optical signal transmitted by the protection device to the arc extinguishing device.
The present invention provides an embodiment of an arc extinguishing apparatus, the arc extinguishing apparatus including:
the controller is used for receiving the optical signal transmitted by the protection device, converting the optical signal into an electrical signal and controlling the capacitor to discharge through the electrical signal;
the capacitor charging module is used for charging the capacitor;
the capacitor is used for providing electric energy for the quick vacuum switch and is electrically connected with the controller;
the quick vacuum switch is used for controlling the movable contact and the fixed contact to be closed or opened;
wherein, the capacitor is electrically connected with the rapid vacuum switch.
As shown in fig. 3, in the arc extinguishing device, the controller, the capacitor charging module, the capacitor and the rapid vacuum switch are electrically connected in sequence, the controller receives the optical signal transmitted by the protection device and converts the optical signal into an electrical signal, and the capacitor is controlled to discharge through the electrical signal, so that the rapid vacuum switch controls the moving contact and the fixed contact to be closed, and the arc is extinguished.
Further, the arc extinguishing device still includes:
the capacitor charging module is used for charging the capacitor, so that the normal work of the capacitor is guaranteed, the capacitor has a quick re-opening function, the capacitor can be re-opened after 1 millisecond when the quick vacuum switch is closed, and the opening time is less than 6 milliseconds.
In the invention, after the arc extinguishing device receives the opening command of the protection device, the movable contact and the fixed contact are quickly closed, so that the arc light is extinguished.
In the invention, the photoelectric converter can also be integrated into the protection device, and the controller has the function of bidirectionally controlling the quick vacuum switch.
In the invention, the power of the quick vacuum switch is a permanent magnet mechanism or a Thomson electromagnetic repulsion mechanism, and the quick vacuum switch has a function of bidirectional work.
As shown in fig. 2, the present invention provides an embodiment of an arc light protection device capable of rapidly extinguishing an arc, the arc light protection device includes an arc light probe, an optical-to-electrical converter, a transmission optical fiber, a protection device, a communication optical fiber, an arc extinguishing device, a current transformer, and a circuit breaker; the arc light probe detects an arc light signal and transmits the arc light signal to the photoelectric converter through the transmission optical fiber, the photoelectric converter converts the arc light signal into an electric signal and transmits the electric signal to the protection device, the protection device converts the electric signal into an optical signal and transmits the optical signal to the arc extinguishing device through the communication optical fiber, and the arc extinguishing device closes a moving contact and a fixed contact in the arc extinguishing device through the optical signal so as to extinguish arc light; meanwhile, the current transformer sends a three-phase electric signal to the protection device, and the protection device controls the circuit breaker to trip; the arc control device comprises a controller, a capacitor, a rapid vacuum switch and a capacitance charging module, wherein the controller receives an optical signal transmitted by the protection device and converts the optical signal into an electric signal, and the capacitor is controlled to discharge through the electric signal, so that the rapid vacuum switch controls the moving contact and the fixed contact to be closed.
In the invention, an analysis module for analyzing the electrical signal transmitted by the photoelectric converter and converting the electrical signal into an optical signal is arranged in the protection device, wherein the optical signal is an analog optical signal or a digital optical signal.
In the invention, the light receiving part of the arc light probe is made of organic materials or inorganic materials, the organic materials or inorganic materials have the functions of diffuse reflection, diffusion and light uniformization on the radiation spectrum of arc light, and the arc light signal monitoring in a 2 pi stereo space right in front of the arc light probe is realized through the geometric shape of the arc light probe. The light receiving part of the arc light probe is integrated with the optical communication standard connecting device, so that the field installation is convenient.
In the invention, the transmission optical fiber can adopt PMMA plastic optical fiber, quartz multimode optical fiber or quartz large-core optical fiber.
In the invention, the photoelectric converter can receive a plurality of paths of arc light signals, perform photoelectric conversion and transmit the converted electric signals to the protection device through the electric network port or the optical network port.
In the invention, an arc light probe is arranged at a position needing to be monitored in a switch cabinet, when an arc light fault occurs, an arc light signal collected is transmitted to a photoelectric converter through a transmission optical fiber or is directly transmitted to a protection device through the transmission optical fiber, the arc light signal is transmitted to the protection device by the photoelectric converter, then protection logic processing is completed by the protection device, and a control command is sent out, wherein the command is an optical signal and is transmitted to a rapid arc extinguishing device through a communication optical fiber, the rapid arc extinguishing device sends out an action command after receiving a protection command, so that the fault arc is rapidly extinguished, and the circuit breaker is tripped by combining the collected electric quantity (three-phase current IA, IB and IC) signals of a current transformer.
The invention only needs 3-5 milliseconds from the moment when the action command of the protection device is received to the moment when the rapid vacuum switch is closed, and the moving contact and the fixed contact are rapidly closed without bouncing phenomenon.
As shown in fig. 4, the present invention provides an arc light protection method capable of rapidly extinguishing an arc, including the following steps:
step S1, the arc light probe detects an arc light signal and transmits the arc light signal to the photoelectric converter or the protection device;
step S2, the photoelectric converter receives the arc light signal transmitted by the arc light probe, converts the arc light signal into an electric signal and transmits the electric signal to the protection device;
step S3, the protection device receives the electric signal transmitted by the photoelectric converter, performs protection logic processing, sends out a control signal, modulates the signal into an optical signal and transmits the optical signal to the arc extinguishing device through a communication optical fiber;
and step S4, the arc extinguishing device receives the optical signal transmitted by the protection device and closes the movable contact and the fixed contact in the arc extinguishing device through the optical signal so as to extinguish the arc light.
In step S3, the protection device receives the electrical signal transmitted by the optical-electrical converter, performs protection logic processing, sends out a control signal, modulates the electrical signal into an optical signal, and transmits the optical signal to the arc extinguishing device through the communication fiber.
As shown in fig. 5, step S4 includes:
step S41, the controller in the arc extinguishing device receives the optical signal transmitted by the protection device, converts the optical signal into an electrical signal, and controls the capacitor to discharge through the electrical signal;
step S42, the capacitor enables the rapid vacuum switch to control the moving contact and the fixed contact to be closed, so that arc light is extinguished;
and step S43, the controller in the arc-extinguishing device has a bidirectional control function, and the moving contact and the fixed contact of the rapid vacuum switch can be closed or opened according to the protection requirement.
The invention also relates to a modular combination of the arc light protection system, which can integrate the photoelectric converter, the protection device and the arc extinguishing device into a standard screen cabinet.
The invention is used in the bus protection system of the distribution network with the voltage grade below 35KV, and can also be used in the direct-current medium-low voltage distribution network protection system, the invention can quickly extinguish the fault electric arc, protect the personal safety, and reduce the loss of the electric arc light fault to the primary equipment; the protection circuit is suitable for protecting medium and low voltage buses and transformers in occasions such as transformer substations, power plants, industrial and mining enterprises and the like, and is also suitable for protecting electric power systems on ships.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An arc light protection device capable of rapidly extinguishing arcs, which is connected with a switch cabinet, and is characterized by comprising:
the arc light probe is arranged in the switch cabinet and used for detecting an arc light signal;
the photoelectric converter is used for receiving the arc light signal transmitted by the arc light probe and converting the arc light signal into an electric signal;
the protection device is used for receiving the electric signal transmitted by the photoelectric converter and converting the electric signal into an optical signal;
and the arc extinguishing device is used for receiving the optical signal transmitted by the protection device and enabling the arc extinguishing device to work through the optical signal, and the moving contact and the fixed contact are quickly closed so as to extinguish arc light.
2. A rapid quenching arc protection device according to claim 1, further comprising:
the transmission optical fiber is used for transmitting the arc light signal transmitted by the arc light probe into the photoelectric converter;
and the communication optical fiber is used for transmitting the optical signal transmitted by the protection device to the arc extinguishing device.
3. A rapid quenching arc protection device according to claim 1, further comprising:
the current transformer is used for sending a three-phase electric signal to the protection device;
and the circuit breaker is electrically connected with the protection device.
4. An arc light protection device capable of rapidly extinguishing arcs according to claim 1, wherein the arc extinguishing means comprises:
the controller is used for receiving the optical signal transmitted by the protection device, converting the optical signal into an electrical signal and controlling the capacitor to discharge through the electrical signal;
the capacitor is used for charging and discharging and is electrically connected with the controller;
the quick vacuum switch is used for controlling the movable contact and the fixed contact to be closed or opened;
wherein the capacitor is electrically connected with the rapid vacuum switch.
5. An arc light protection device capable of rapidly extinguishing arcs according to claim 4, wherein the arc extinguishing device further comprises:
and the capacitor charging module is used for charging the capacitor.
6. An arc light protection device capable of rapidly extinguishing arcs according to claim 1, wherein an analysis module for analyzing the electric signal transmitted by the photoelectric converter and converting the electric signal into an optical signal is arranged in the protection device.
7. The arc protection device of claim 6, wherein the optical signal is an analog optical signal or a digital optical signal.
8. A rapid quenching arc light protection device according to claim 1, wherein said photoelectric converter is integrated in said protection device.
9. An arc light protection method capable of rapidly extinguishing arc is characterized by comprising the following steps:
step S1, the arc light probe detects an arc light signal and transmits the arc light signal to the photoelectric converter;
step S2, the photoelectric converter receives the arc light signal transmitted by the arc light probe, converts the arc light signal into an electric signal and transmits the electric signal to the protection device;
step S3, the protection device receives the electric signal transmitted by the photoelectric converter, performs protection logic processing, sends out a control signal, modulates the electric signal into an optical signal and transmits the optical signal to the arc extinguishing device through a communication optical fiber;
and step S4, the arc extinguishing device receives the optical signal transmitted by the protection device and starts to start up through the optical signal, so that the movable contact and the fixed contact are quickly closed, and the arc light is extinguished.
10. The arc light protection method of claim 9, wherein step S4 includes:
step S41, the controller in the arc extinguishing device receives the optical signal transmitted by the protection device, converts the optical signal into an electrical signal, and controls the capacitor to discharge through the electrical signal;
and step S42, the capacitor enables the rapid vacuum switch to control the movable contact and the fixed contact to be closed, so that the arc light is extinguished.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811518341.2A CN111313375A (en) | 2018-12-12 | 2018-12-12 | Arc light protection equipment capable of rapidly extinguishing arc and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811518341.2A CN111313375A (en) | 2018-12-12 | 2018-12-12 | Arc light protection equipment capable of rapidly extinguishing arc and method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111313375A true CN111313375A (en) | 2020-06-19 |
Family
ID=71146534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811518341.2A Pending CN111313375A (en) | 2018-12-12 | 2018-12-12 | Arc light protection equipment capable of rapidly extinguishing arc and method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111313375A (en) |
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2018
- 2018-12-12 CN CN201811518341.2A patent/CN111313375A/en active Pending
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