阅读说明：本技术 一种直流断路器智能化控制装置 (Intelligent control device for direct current breaker ) 是由 韩伟 朱忠建 戴罡 奚杰 孟凡非 葛飞 衣陈晨 杨俊� 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种直流断路器智能化控制装置,包括上接线排、下接线排、动触头、断路器控制装置,断路器控制装置包括智能控制单元、温度检测单元、位移检测单元、触头推杆、挡板、行程开关、第一位移传感器；上接线排上设置有第一温度传感器；下接线排上设置有第二温度传感器和电流传感器；动触头上设置有第三温度传感器；动触头的后方设置有用于检测动触头是否在分闸位置第二位移传感器；动触头在合闸位置与上接线排导通或在分闸位置与上接线排断开,上接线排、动触头与下接线排组成主电路。采用模块化设计方案,可检测断路器内部状态信号,快速分析和判断故障情况,控制断路器进行分合闸操作,大幅提高直流断路器的安全性和可靠性。(The invention discloses an intelligent control device of a direct current breaker, which comprises an upper wiring bar, a lower wiring bar, a moving contact and a breaker control device, wherein the breaker control device comprises an intelligent control unit, a temperature detection unit, a displacement detection unit, a contact push rod, a baffle, a travel switch and a first displacement sensor; the upper wiring row is provided with a first temperature sensor; the lower connecting line bank is provided with a second temperature sensor and a current sensor; a third temperature sensor is arranged on the movable contact; a second displacement sensor for detecting whether the moving contact is at the opening position is arranged behind the moving contact; the moving contact is conducted with the upper wiring bar at the switching-on position or disconnected with the upper wiring bar at the switching-off position, and the upper wiring bar, the moving contact and the lower wiring bar form a main circuit. By adopting the modular design scheme, the internal state signal of the circuit breaker can be detected, the fault condition can be rapidly analyzed and judged, the circuit breaker can be controlled to be switched on and off, and the safety and the reliability of the direct current circuit breaker are greatly improved.)

1. The utility model provides a direct current breaker intelligent control device, includes that the last wiring is arranged, the lower wiring is arranged, moving contact, circuit breaker controlling means, its characterized in that:

the circuit breaker control device comprises an intelligent control unit, a temperature detection unit, a displacement detection unit, a contact push rod, a baffle, a travel switch and a first displacement sensor; the contact push rod is connected with the moving contact to push the baffle plate, so that the travel switch is switched on or off; the upper wiring bar is provided with a first temperature sensor; the lower connecting line row is provided with a second temperature sensor and a current sensor; a third temperature sensor is arranged on the movable contact; a second displacement sensor for detecting whether the moving contact is at the opening position is arranged behind the moving contact;

the moving contact is connected with the lower wiring row, the moving contact is conducted with the upper wiring row at a switching-on position or disconnected with the upper wiring row at a switching-off position, and the upper wiring row, the moving contact and the lower wiring row form a main circuit.

2. The intelligent control device of a direct current circuit breaker according to claim 1, characterized in that: the intelligent control device of the direct current circuit breaker further comprises a tripping device and a closing device, the closing device can realize normal opening and closing operations of the circuit breaker, and the tripping device can realize an emergency tripping and opening function of the circuit breaker under the condition of line faults.

3. The intelligent control device of a direct current circuit breaker according to claim 1, characterized in that: and a current measuring unit for measuring the current value flowing through the main circuit of the circuit breaker is arranged in the circuit breaker control device.

4. The intelligent control device of a direct current circuit breaker according to claim 1, characterized in that: and an interface unit for accessing an external control power supply and switching-on and switching-off control signals is arranged in the circuit breaker control device.

5. The intelligent control device of a direct current circuit breaker according to claim 4, characterized in that: the interface unit is provided with an alternating current-direct current conversion circuit for converting an external alternating current control power supply into a direct current power supply.

6. The intelligent control device of a direct current circuit breaker according to claim 1, characterized in that: the intelligent control device of the direct current circuit breaker further comprises a closing device and a tripping device, wherein the closing device is positioned between the tripping device and the circuit breaker control device.

7. The intelligent control device of a direct current circuit breaker according to claim 1, characterized in that: the extension direction of the upper wiring row is parallel to the extension direction of the lower wiring row.

8. The intelligent control device of a direct current circuit breaker according to claim 1, characterized in that: the circuit breaker control device further comprises a current measuring unit and an interface unit, wherein the intelligent control unit, the temperature detecting unit, the displacement detecting unit, the current measuring unit and the interface unit are sequentially arranged.

9. The intelligent control device of a direct current circuit breaker according to claim 1, characterized in that: the circuit breaker control device further comprises a current measuring unit and an interface unit, wherein the temperature detection unit is located between the intelligent control unit and the displacement detection unit.

10. The intelligent control device of a direct current circuit breaker according to claim 1, characterized in that: the extending direction of the upper wiring row is vertical to the extending direction of the movable contact.

Technical Field

The invention relates to the field of direct current breakers, in particular to an intelligent control device of a direct current breaker.

Background

At present, the urban rail transit industry of China is rapidly developed, and rail transit lines such as subways, light rails and trams are newly built in all large cities. In order to improve the operation efficiency and reduce the construction cost of rail transit such as subways, light rails, trams and the like, the rail transit vehicles generally adopt a direct-current traction power supply system. The direct current quick breaker is used as core protection equipment of a direct current traction power supply system, can quickly cut off the fault current of a loop, and is an important guarantee for the safe operation of the direct current power supply system. Compared with an alternating current system, the direct current system is more difficult to switch on and off because no natural zero crossing point exists in the direct current system, so that the direct current quick breaker needs a safe and reliable control device, can quickly analyze and judge the fault condition, quickly cuts off short-circuit current under the fault condition, prevents misoperation, and ensures the operation of the urban rail transit direct current traction power supply system.

When the direct current breaker is opened, current opposite to the main circuit of the closing coil is applied to two ends of the closing coil, the closing coil is charged reversely, residual magnetism of iron core materials of the closing coil is eliminated, opening speed of the closing coil is improved, and rapid opening is guaranteed. However, the control circuit cannot detect the internal state signal of the circuit breaker, and the direct current circuit breaker cannot be quickly disconnected under the fault condition, so that power supply accidents are easily caused.

The authorized bulletin number is CN109888749B, which discloses a method and an apparatus for controlling a dc circuit breaker, wherein after a first circuit module receives a trip instruction sent by a flexible dc control protection system, the first circuit module determines an instruction type of the trip instruction, and when the instruction is a protection control type, the first circuit module generates a fast trip signal and sends the fast trip signal to a second circuit module; when the command is of a manual control type, the first circuit module generates a slow tripping signal and sends the slow tripping signal to the second circuit module; the direct current circuit breaker can be tripped slowly or quickly according to corresponding working conditions. Under the working condition that rapid tripping is not necessary, the invention can realize slow tripping and improve the breaking success rate of the direct current breaker. However, the dc circuit breaker control device also cannot detect the internal state signal of the circuit breaker, and cannot rapidly break the dc circuit breaker in case of a fault, which is likely to cause a power supply accident.

The above patent document discloses that the conventional dc circuit breaker has the following drawbacks:

the existing DC circuit breaker control device can only receive external control signals of a previous-stage protection device of the circuit breaker mostly, the opening and closing functions of the circuit breaker are achieved, only simple state signals such as opening and closing positions of the circuit breaker can be uploaded, the existing DC circuit breaker control device has the defect that circuit breaker fault signals cannot be detected and uploaded, and the matching of the previous-stage protection device is needed, so that the fault frequency of the circuit breaker is increased, the circuit breaker is easily damaged under the fault condition, serious power supply accidents are caused, and the service life and the safety of the DC circuit breaker are greatly reduced.

Disclosure of Invention

In order to overcome the defects of the prior art, one of the objectives of the present invention is to provide an intelligent control device for a dc circuit breaker, which can solve the problems of low safety and reliability.

One of the purposes of the invention is realized by adopting the following technical scheme:

an intelligent control device of a direct current breaker comprises an upper wiring bar, a lower wiring bar, a moving contact and a breaker control device, wherein the breaker control device comprises an intelligent control unit, a temperature detection unit, a displacement detection unit, a contact push rod, a baffle, a travel switch and a first displacement sensor; the contact push rod is connected with the moving contact to push the baffle plate, so that the travel switch is switched on or off; the upper wiring bar is provided with a first temperature sensor; the lower connecting line row is provided with a second temperature sensor and a current sensor; a third temperature sensor is arranged on the movable contact; a second displacement sensor for detecting whether the moving contact is at the opening position is arranged behind the moving contact; the moving contact is connected with the lower wiring row, the moving contact is conducted with the upper wiring row at a switching-on position or disconnected with the upper wiring row at a switching-off position, and the upper wiring row, the moving contact and the lower wiring row form a main circuit.

Furthermore, the intelligent control device of the direct current circuit breaker further comprises a tripping device and a closing device, the closing device can realize normal opening and closing operations of the circuit breaker, and the tripping device can realize an emergency tripping and opening function of the circuit breaker under the condition of line faults.

Further, a current measuring unit for measuring a current value flowing through the main circuit of the circuit breaker is arranged in the circuit breaker control device.

Furthermore, an interface unit for accessing an external control power supply and switching-on and switching-off control signals is arranged in the circuit breaker control device.

Further, the interface unit is provided with an alternating current-direct current conversion circuit for converting an external alternating current control power supply into a direct current power supply.

Furthermore, the intelligent control device of the direct current circuit breaker further comprises a closing device and a tripping device, wherein the closing device is positioned between the tripping device and the circuit breaker control device.

Further, the extending direction of the upper wiring row is parallel to the extending direction of the lower wiring row.

Furthermore, the circuit breaker control device further comprises a current measuring unit and an interface unit, wherein the intelligent control unit, the temperature detecting unit, the displacement detecting unit, the current measuring unit and the interface unit are sequentially arranged.

Further, the circuit breaker control device further comprises a current measuring unit and an interface unit, and the temperature detection unit is located between the intelligent control unit and the displacement detection unit.

Furthermore, the extending direction of the upper wiring bar is perpendicular to the extending direction of the movable contact.

Compared with the prior art, the invention has the beneficial effects that:

the circuit breaker control device comprises an intelligent control unit, a temperature detection unit, a displacement detection unit, a contact push rod, a baffle, a travel switch and a first displacement sensor; the contact push rod is connected with the moving contact to push the baffle plate, so that the travel switch is switched on or off; the upper wiring bar is provided with a first temperature sensor; the lower connecting line row is provided with a second temperature sensor and a current sensor; a third temperature sensor is arranged on the movable contact; a second displacement sensor for detecting whether the moving contact is at the opening position is arranged behind the moving contact; the moving contact is connected with the lower wiring row, the moving contact is conducted with the upper wiring row at a switching-on position or disconnected with the upper wiring row at a switching-off position, and the upper wiring row, the moving contact and the lower wiring row form a main circuit. By adopting the modular design scheme, the internal state signal of the circuit breaker can be detected, the fault condition can be rapidly analyzed and judged, the circuit breaker can be controlled to be switched on and off, and the safety and the reliability of the direct current circuit breaker are greatly improved.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a structural diagram of an intelligent control device of a dc circuit breaker according to a preferred embodiment of the present invention;

fig. 2 is another structural diagram of the intelligent control device of the direct current breaker shown in fig. 1.

In the figure: 1. an upper wiring bar; 2. connecting a wiring row; 3. a moving contact; 4. a circuit breaker control device; 5. an intelligent control unit; 6. a temperature detection unit; 7. a displacement detection unit; 8. a current measuring unit; 9. an interface unit; 10. a contact push rod; 11. a baffle plate; 12. a travel switch; 13. a trip device; 14. a switching-on device; 61. a first temperature sensor; 62. a second temperature sensor; 63. a third temperature sensor; 71. a first displacement sensor; 72. a second displacement sensor; 81. and a current sensor.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-2, an intelligent control device for a dc circuit breaker includes an upper wiring bar 1, a lower wiring bar 2, a movable contact 3, and a circuit breaker control device 4, where the circuit breaker control device 4 includes an intelligent control unit 5, a temperature detection unit 6, a displacement detection unit 7, a contact push rod 10, a baffle 11, a travel switch 12, and a first displacement sensor 71; the contact push rod 10 is connected with the moving contact 3 to push the baffle 11, so that the travel switch 12 is switched on or off; the upper wiring bar 1 is provided with a first temperature sensor 61; the lower wiring row 2 is provided with a second temperature sensor 62 and a current sensor 81; a third temperature sensor 63 is arranged on the moving contact 3; a second displacement sensor 72 for detecting whether the moving contact 3 is at the opening position is arranged behind the moving contact 3; the moving contact 3 is connected with the lower wiring row 2, the moving contact 3 is conducted with the upper wiring row 1 at a switching-on position or disconnected with the upper wiring row 1 at a switching-off position, and the upper wiring row 1, the moving contact 3 and the lower wiring row 2 form a main circuit. By adopting the modular design scheme, the internal state signal of the circuit breaker can be detected, the fault condition can be rapidly analyzed and judged, the circuit breaker can be controlled to be switched on and off, and the safety and the reliability of the direct current circuit breaker are greatly improved.

Preferably, the intelligent control device for the direct current circuit breaker further comprises a tripping device 13 and a closing device 14, the closing device 14 can realize normal opening and closing operations of the circuit breaker, and the tripping device 13 can realize an emergency tripping and opening function of the circuit breaker under the condition of a line fault. Specifically, the main circuit of the circuit breaker mainly comprises an upper wiring bar 1, a movable contact 3 and a lower wiring bar 2, please refer to fig. 1, wherein the movable contact 3 is connected with the lower wiring bar 2, and the movable contact 3 is conducted with the upper wiring bar 1 at the switching-on position; referring to fig. 2, the upper line bank 1 is disconnected in the open position. The circuit breaker is generally provided with a tripping device 13 and a closing device 14, the closing device 14 can realize normal opening and closing operations of the circuit breaker, and the tripping device 13 can realize an emergency tripping and opening function of the circuit breaker.

Preferably, a current measuring unit 8 for measuring a current value flowing through the main circuit of the circuit breaker is provided in the circuit breaker control device 4. And an interface unit 9 for accessing an external control power supply and switching-on and switching-off control signals is arranged in the circuit breaker control device 4. The interface unit 9 is provided with an ac/dc conversion circuit for converting an external ac control power supply into a dc power supply. Converting an external AC control power source to a DC power source, such as AC220V to DC 24V.

Preferably, the intelligent control device for the direct current circuit breaker further comprises a closing device 14 and a tripping device 13, and the closing device 14 is located between the tripping device 13 and the circuit breaker control device 4. The extension direction of the upper wiring row 1 is parallel to the extension direction of the lower wiring row 2. The circuit breaker control device 4 further comprises a current measuring unit 8 and an interface unit 9, wherein the intelligent control unit 5, the temperature detecting unit 6, the displacement detecting unit 7, the current measuring unit 8 and the interface unit 9 are sequentially arranged. Specifically, the circuit breaker control device 4 is integrated on the direct current circuit breaker, adopts the modularized design scheme, and comprises an intelligent control unit 5, a temperature detection unit 6, a displacement detection unit 7, a contact push rod 10, a baffle 11 and a travel switch 12. The intelligent control unit 5 can control the tripping device 13 to act, so that the emergency tripping and brake-separating function of the circuit breaker is realized; the intelligent control unit 5 can control the action of the closing device 14, and the normal opening and closing operation of the circuit breaker is realized. The temperature detection unit 6 can detect the internal temperature of the circuit breaker, and the displacement detection unit 7 can detect whether the circuit breaker normally acts. The moving contact 3 is connected with a contact push rod 10, the contact push rod 10 can be driven to move in the process of opening or closing movement of the moving contact 3, and the contact push rod 10 pushes a baffle plate 11 to enable a travel switch 12 to be switched on or switched off. The on or off of the travel switch 12 may indicate the on/off state of the circuit breaker.

Preferably, the circuit breaker control device 4 further includes a current measuring unit 8 and an interface unit 9, and the temperature detecting unit 6 is located between the intelligent control unit 5 and the displacement detecting unit 7. The extending direction of the upper wiring bar 1 is vertical to the extending direction of the movable contact 3. Specifically, in the actual operation process, when the temperature detection unit 6 detects that the internal temperature of the circuit breaker is abnormal, a circuit breaker fault signal can be sent to the intelligent control unit 5, and the intelligent control unit 5 carries out emergency tripping and brake opening. When the displacement detection unit 7 detects that the breaker does not normally act, a breaker fault signal can be sent to the intelligent control unit 5, and the intelligent control unit 5 carries out emergency tripping and brake opening. When the current measuring unit 8 detects that the current value of the main circuit of the circuit breaker is abnormal, for example, short-circuit current occurs, a line fault signal can be sent to the intelligent control unit 5, and the intelligent control unit 5 can perform emergency tripping and opening.

In the actual operation process, the interface unit 9 may upload the measurement quantities detected by the temperature detection unit 6, the displacement detection unit 7, and the current measurement unit 8 to the upper-level control system.

Specifically, the upper wiring block 1 may be provided with a first temperature sensor 61 for measuring the temperature of the upper wiring block 1; a second temperature sensor 62 may be installed on the lower cable bank 2 for measuring the temperature of the lower cable bank 2; a third temperature sensor 63 can be mounted on the movable contact 3 for measuring the temperature of the movable contact 3. The temperature sensor can be selectively installed according to actual needs, and temperature signals are uploaded to the temperature detection unit 6. A first displacement sensor 71 can be installed in the circuit breaker control device 4 and used for detecting the position of the contact push rod 10; a second displacement sensor 72 can be arranged behind the moving contact 3 and used for detecting whether the moving contact 3 is at an opening position; the displacement sensor can be selected according to actual needs and transmits a position signal to the displacement detection unit 7.

In the actual operation process, since the movable contact 3 is coupled with the contact push rod 10, the position signals of the first displacement sensor 71 and the second displacement sensor 72 can be mutually verified. When the position signals of the two displacement sensors are inconsistent, the displacement detection unit 7 can send a breaker fault signal to the intelligent control unit 5, and the intelligent control unit 5 carries out emergency tripping and brake opening. The lower wiring block 2 may be mounted with a current sensor 81 for measuring a value of current flowing through the lower wiring block 2 and uploading a current signal to the current measuring unit 8.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the protection scope of the present invention.