CN110896208A - Intelligent load-limiting universal circuit breaker - Google Patents
Intelligent load-limiting universal circuit breaker Download PDFInfo
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- CN110896208A CN110896208A CN201911200040.XA CN201911200040A CN110896208A CN 110896208 A CN110896208 A CN 110896208A CN 201911200040 A CN201911200040 A CN 201911200040A CN 110896208 A CN110896208 A CN 110896208A
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- reclosing
- circuit breaker
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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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
- H02H1/0061—Details of emergency protective circuit arrangements concerning transmission of signals
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
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Abstract
The invention provides an intelligent load-limiting universal circuit breaker, which comprises a circuit breaker control unit, a tripper and a reclosing action mechanism, wherein the control unit comprises a three-phase current sampling module, a central processing unit and a receiving module, the three-phase current sampling module is used for detecting a current signal on a circuit breaker outlet terminal, when the current on the circuit breaker outlet terminal exceeds a load-limiting threshold value, the central processing unit controls the tripper to work, the receiving module is used for receiving a reclosing key instruction sent by a user and sending the reclosing key instruction to the central processing unit, the central processing unit analyzes and identifies whether the reclosing key instruction is consistent with a preset key instruction, and if so, the central processing unit controls the reclosing mechanism to carry out reclosing operation. The invention not only gives the overload power consumer the opportunity of self-checking, but also solves the problem that the power supply department can recover power supply only by matching with the user on site after the overload trip of the circuit breaker, improves the intellectualization degree of the circuit breaker, and can prevent the misoperation of reclosing of the circuit breaker by other people.
Description
Technical Field
The invention relates to the field of circuit breakers, in particular to an intelligent load-limiting universal circuit breaker.
Background
The existing universal circuit breakers have the function of opening when the current is overloaded, but most of the universal circuit breakers need to be matched with users to recover power supply when workers of a power supply department arrive at the site after overload tripping, and the universal circuit breakers are inconvenient to use.
After a lot of searches, a typical prior art is found, for example, a patent with application number 201410765477.9 discloses an intelligent load-limiting universal circuit breaker, as shown in fig. 3, which improves the safety and reliability of the circuit in operation, and particularly, greatly reduces various strong interferences from a low-voltage power grid when a high-voltage power supply is adopted. Also, for example, patent application No. 200810029066.8 discloses an intelligent load limiting circuit breaker with an automatic reclosing device, and as shown in fig. 4, the patent solves the contradiction between the power supply department and the user that the power supply department is matched with the user to recover the power supply after the circuit breaker is tripped in an overrun mode. Also, as disclosed in the' 201410626935.0 patent, a circuit breaker with a load limit for each time period is disclosed, as shown in fig. 5, which can provide a load limit value for each unit of power consumption for each time period of seven days per week, thereby achieving the most reasonable distribution and utilization of power.
Therefore, how to intelligently limit the load of the conventional circuit breaker, the practical problems to be dealt with urgently (convenience for the user to automatically reclose and provide the intelligent degree and the like) in the practical application of the conventional circuit breaker still have a lot of concrete solutions which are not provided.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an intelligent load-limiting universal circuit breaker, which has the following specific technical scheme:
an intelligent load-limiting universal circuit breaker comprises a circuit breaker control unit, a tripper and a reclosing action mechanism, wherein the control unit comprises a three-phase current sampling module and a central processing unit, the three-phase current sampling module is used for detecting a current signal on a circuit breaker outlet terminal and sending the current signal to the central processing unit, the central processing unit analyzes and identifies whether the current on the circuit breaker outlet terminal reaches a load-limiting threshold value, when the current on the circuit breaker outlet terminal exceeds the load-limiting threshold value, the central processing unit controls the tripper to work and the circuit breaker to open a brake, the reclosing action mechanism is connected with the output end of the central processing unit, the control unit further comprises a receiving module, the receiving module is used for receiving a reclosing key instruction sent by a user and sending the reclosing key instruction to the central processing unit, and the central processing unit analyzes and identifies whether the reclosing key instruction is consistent with a preset key instruction in the central processing unit or not, and if the reclosing key instruction is consistent with the preset key instruction, the central processing unit executes a reclosing program to control the reclosing mechanism to carry out reclosing operation of the circuit breaker.
Optionally, the receiving module is a communication module, the communication module is a 3G, 4G, 5G or wifi module, and the user is connected with the communication module through the mobile intelligent terminal and sends the reclosing key instruction to the central processing unit through the communication module.
Optionally, a two-dimensional code tag is arranged on the outer surface of the intelligent load-limiting universal circuit breaker, a user scans the two-dimensional code tag through a mobile intelligent terminal to open a reclosing small program, the reclosing small program is used for inputting a reclosing key instruction, and then the reclosing small program sends the reclosing key instruction to the communication module.
Optionally, the receiving module is a key input module, and a user inputs a reclosing key instruction on site through the key input module.
Optionally, the load limiting gate value is set between 1.05 times and 1.2 times of rated current.
Optionally, when the user performs multiple reclosings by inputting a reclosing key instruction and still detects current overload of the circuit breaker, the central processing unit refuses to execute a reclosing program to perform a thermal memory state, and the circuit breaker cannot be closed in the thermal memory state of the central processing unit.
Optionally, the control unit includes a telephone function module, the telephone function module is internally provided with alarm information and a telephone number, and after the circuit breaker cannot execute reclosing, the central processing unit starts a telephone alarm program and sends alarm information to the telephone number internally provided in the telephone function module.
Optionally, the reclosing action mechanism is a reclosing relay.
The beneficial effects obtained by the invention comprise:
1. because the reclosing mechanism and the receiving module are arranged in the load limiting circuit breaker, when the power of a power grid used by a user is overloaded, the circuit breaker is opened firstly, then the central processing unit analyzes and judges whether a reclosing key instruction input by the user is consistent with a preset key instruction, and only under the condition that the reclosing key instruction is consistent with the preset key instruction, the central processing unit is the circuit breaker to be reclosed, so that the opportunity of self-checking of an overloaded power consumer is given, and the contradiction problem that the power supply department can restore power supply to the site by matching with the user after the circuit breaker is overloaded and tripped between the power supply department and the user is solved;
2. the user can reclose the circuit breaker by the aid of a reclosing key instruction party, and the power supply department door only needs to send the reclosing key instruction to the user in a wireless network or internet mode, so that the user can be given the opportunity of self-checking and power supply restoration of the reclosing of the circuit breaker, the intelligent degree of the circuit breaker is improved, and misoperation of reclosing of the circuit breaker by other people can be prevented;
3. the reclosing key command is input by scanning the two-dimensional code to open the reclosing small program, so that a user can conveniently input the reclosing key command to carry out reclosing operation of the circuit breaker.
Drawings
The present invention will be further understood from the following description taken in conjunction with the accompanying drawings, the emphasis instead being placed upon illustrating the principles of the embodiments.
Fig. 1 is a schematic overall structure diagram of an intelligent load limiting universal circuit breaker according to one embodiment of the present invention;
fig. 2 is a structural schematic diagram two of an overall structural schematic diagram one of an intelligent load limiting universal circuit breaker according to one embodiment of the present invention;
fig. 3 is a schematic overall structure diagram of an intelligent load limiting universal circuit breaker in the prior art;
fig. 4 is a schematic diagram of an overall structure of an intelligent load limiting circuit breaker with an automatic reclosing switch in the prior art;
fig. 5 is a schematic diagram of an overall structure of a time-sharing load limiting circuit breaker in the prior art.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to embodiments thereof; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Other systems, methods, and/or features of the present embodiments will become apparent to those skilled in the art upon review of the following detailed description. It is intended that all such additional systems, methods, features and advantages be included within this description, be within the scope of the invention, and be protected by the accompanying claims. Additional features of the disclosed embodiments are described in, and will be apparent from, the detailed description that follows.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms described above will be understood by those of ordinary skill in the art according to the specific circumstances.
The invention relates to an intelligent load-limiting universal circuit breaker, which explains the following embodiments according to the attached drawings:
the first embodiment is as follows:
as shown in fig. 1, an intelligent load-limiting universal circuit breaker comprises a circuit breaker control unit, a tripper and a reclosing action mechanism, wherein the control unit comprises a three-phase current sampling module and a central processing unit, the three-phase current sampling module is used for detecting a current signal on a circuit breaker leading-out terminal and sending the current signal to the central processing unit, the central processing unit analyzes and identifies whether the current on the circuit breaker leading-out terminal reaches a load-limiting threshold value, when the current on the circuit breaker leading-out terminal exceeds the load-limiting threshold value, the central processing unit controls the working of the tripper and opens a circuit breaker, the reclosing action mechanism is connected with the output end of the central processing unit, the control unit further comprises a receiving module, the receiving module is used for receiving a reclosing key instruction sent by a user and sending the reclosing key instruction to the central processing unit, and the central processing unit analyzes and identifies whether the reclosing key instruction is connected with a preset key And if the reclosing key instruction is consistent with the preset key instruction, the central processing unit executes a reclosing program to control the reclosing mechanism to carry out reclosing operation of the circuit breaker.
In the present embodiment, the load limiting gate value is set between 1.05 times and 1.2 times the rated current. When a user inputs a reclosing key instruction to carry out multiple reclosing and still detects the current overload of the circuit breaker, the central processing unit refuses to execute a reclosing program to carry out a thermal memory state, and the circuit breaker cannot be closed in the thermal memory state of the central processing unit. The control unit comprises a telephone function module, alarm information and a telephone number are arranged in the telephone function module, and after the circuit breaker cannot execute reclosing, the central processing unit starts a telephone alarm program and sends alarm information to the telephone number arranged in the telephone function module.
When the current value acquired by the three-phase current acquisition module is analyzed and compared by the central processing unit to be larger than the set load limiting threshold value, the central processing unit drives the tripper driving circuit to enable the tripper coil to work and enable the circuit breaker to carry out brake opening operation. After the first switching-off of the circuit breaker is confirmed, the central processing unit receives a reclosing key instruction sent by a user through the receiving module, then analyzes and judges whether the reclosing key instruction is consistent with a preset key instruction, if so, executes a reclosing program, and controls the automatic reclosing mechanism to carry out reclosing operation of the circuit breaker.
After the circuit breaker is switched on, the three-phase sampling module continuously samples the three-phase current of the circuit breaker, the sampled current signal is still larger than the set load limiting threshold value after being analyzed by the central processing unit, and then the tripper coil works again by driving the tripper driving circuit, so that the circuit breaker is switched off for the second time. After the circuit breaker is confirmed to be opened for the second time, the central processing unit receives a reclosing key instruction sent by a user through the receiving module, then whether the reclosing key instruction is consistent with a preset key instruction or not is analyzed and judged, if so, a reclosing program is executed again, and the automatic reclosing mechanism is controlled to conduct reclosing operation of the circuit breaker.
After the circuit breaker is switched on, the three-phase sampling module carries out third sampling on three-phase current of the circuit breaker, the sampled current signal is analyzed by the central processing unit to be still larger than a set load limiting threshold value, and then the tripper driving circuit is driven to enable a tripper coil to work for the third time, so that the circuit breaker is switched off for the third time. After the third switching-off of the circuit breaker is confirmed, the central processing unit receives a reclosing key instruction sent by a user through the receiving module, then whether the reclosing key instruction is consistent with a preset key instruction or not is analyzed and judged, if so, a reclosing program is executed for the third time, and the automatic reclosing mechanism is controlled to carry out reclosing operation of the circuit breaker.
And if the three-phase current signal of the circuit breaker collected by the three-phase current sampling module for the fourth time is still larger than the load limiting threshold value after being analyzed and compared by the central processing unit, the tripper coil is made to work for the fourth time, the circuit breaker is made to open the brake, and the load limiting control program is completed. After that, the CPU refuses to execute the reclosing program and enters a thermal memory state. The breaker can not be switched on in the thermal memory state of the central processing unit. At this time, the central processing unit starts a telephone alarm program and sends alarm information to the built-in telephone number.
In the embodiment, because the reclosing mechanism and the receiving module are arranged in the load limiting circuit breaker, when the power of a power grid used by a user is overloaded, the circuit breaker is firstly subjected to opening operation, then the central processing unit analyzes and judges whether a reclosing key instruction input by the user is consistent with a preset key instruction, and only under the condition that the reclosing key instruction is consistent with the preset key instruction, the central processing unit is used for reclosing the circuit breaker, so that the overload power consumer is given the opportunity of self-checking, and the contradiction that the power supply department can recover power supply by matching with the user on site after the circuit breaker is overloaded and tripped between the power supply department and the user is solved. In addition, a user can enable the circuit breaker to be reclosed through a reclosing key instruction party, and the power supply part door only needs to send the reclosing key instruction to the user in a wireless network or internet mode, so that the user can be given the opportunity of self-checking and power supply recovery of circuit breaker reclosing, the intelligentization degree of the circuit breaker is improved, and misoperation of circuit breaker reclosing by other people can be prevented.
Example two:
as shown in fig. 1, an intelligent load-limiting universal circuit breaker comprises a circuit breaker control unit, a tripper and a reclosing action mechanism, wherein the control unit comprises a three-phase current sampling module and a central processing unit, the three-phase current sampling module is used for detecting a current signal on a circuit breaker leading-out terminal and sending the current signal to the central processing unit, the central processing unit analyzes and identifies whether the current on the circuit breaker leading-out terminal reaches a load-limiting threshold value, when the current on the circuit breaker leading-out terminal exceeds the load-limiting threshold value, the central processing unit controls the working of the tripper and opens a circuit breaker, the reclosing action mechanism is connected with the output end of the central processing unit, the control unit further comprises a receiving module, the receiving module is used for receiving a reclosing key instruction sent by a user and sending the reclosing key instruction to the central processing unit, and the central processing unit analyzes and identifies whether the reclosing key instruction is connected with a preset key And if the reclosing key instruction is consistent with the preset key instruction, the central processing unit executes a reclosing program to control the reclosing mechanism to carry out reclosing operation of the circuit breaker.
In the present embodiment, the load limiting gate value is set between 1.05 times and 1.2 times the rated current. When a user inputs a reclosing key instruction to carry out multiple reclosing and still detects the current overload of the circuit breaker, the central processing unit refuses to execute a reclosing program to carry out a thermal memory state, and the circuit breaker cannot be closed in the thermal memory state of the central processing unit. The control unit comprises a telephone function module, alarm information and a telephone number are arranged in the telephone function module, and after the circuit breaker cannot execute reclosing, the central processing unit starts a telephone alarm program and sends alarm information to the telephone number arranged in the telephone function module.
When the current value acquired by the three-phase current acquisition module is analyzed and compared by the central processing unit to be larger than the set load limiting threshold value, the central processing unit drives the tripper driving circuit to enable the tripper coil to work and enable the circuit breaker to carry out brake opening operation. After the first switching-off of the circuit breaker is confirmed, the central processing unit receives a reclosing key instruction sent by a user through the receiving module, then whether the reclosing key instruction is consistent with a preset key instruction or not is analyzed and judged, if so, a reclosing program is executed after five minutes of delay, and the automatic reclosing mechanism is controlled to carry out reclosing operation of the circuit breaker.
After the circuit breaker is switched on, the three-phase sampling module continuously samples the three-phase current of the circuit breaker, the sampled current signal is still larger than the set load limiting threshold value after being analyzed by the central processing unit, and then the tripper coil works again by driving the tripper driving circuit, so that the circuit breaker is switched off for the second time. After the circuit breaker is confirmed to be opened for the second time, the central processing unit receives a reclosing key instruction sent by a user through the receiving module, then analyzes and judges whether the reclosing key instruction is consistent with a preset key instruction, if so, executes a reclosing program again after seven-minute delay, and controls the automatic reclosing mechanism to carry out reclosing operation of the circuit breaker.
After the circuit breaker is switched on, the three-phase sampling module carries out third sampling on three-phase current of the circuit breaker, the sampled current signal is analyzed by the central processing unit to be still larger than a set load limiting threshold value, and then the tripper driving circuit is driven to enable a tripper coil to work for the third time, so that the circuit breaker is switched off for the third time. After the third switching-off of the circuit breaker is confirmed, the central processing unit receives a reclosing key instruction sent by a user through the receiving module, then whether the reclosing key instruction is consistent with a preset key instruction or not is analyzed and judged, if so, a reclosing program is executed for the third time after ten minutes of delay, and the automatic reclosing mechanism is controlled to carry out reclosing operation of the circuit breaker.
And if the three-phase current signal of the circuit breaker collected by the three-phase current sampling module for the fourth time is still larger than the load limiting threshold value after being analyzed and compared by the central processing unit, the tripper coil is made to work for the fourth time, the circuit breaker is made to open the brake, and the load limiting control program is completed. After that, the CPU refuses to execute the reclosing program and enters a thermal memory state. The breaker can not be switched on in the thermal memory state of the central processing unit. At this time, the central processing unit starts a telephone alarm program and sends alarm information to the built-in telephone number. The time of the breaker in the thermal memory state can be set to be 30 minutes or more, and after the thermal memory message is sent, the breaker can perform closing operation.
In the embodiment, because the reclosing mechanism and the receiving module are arranged in the load limiting circuit breaker, when the power of a power grid used by a user is overloaded, the circuit breaker is firstly subjected to opening operation, then the central processing unit analyzes and judges whether a reclosing key instruction input by the user is consistent with a preset key instruction, and only under the condition that the reclosing key instruction is consistent with the preset key instruction, the central processing unit is used for reclosing the circuit breaker, so that the overload power consumer is given the opportunity of self-checking, and the contradiction that the power supply department can recover power supply by matching with the user on site after the circuit breaker is overloaded and tripped between the power supply department and the user is solved. In addition, a user can enable the circuit breaker to be reclosed through a reclosing key instruction party, and the power supply part door only needs to send the reclosing key instruction to the user in a wireless network or internet mode, so that the user can be given the opportunity of self-checking and power supply recovery of circuit breaker reclosing, the intelligentization degree of the circuit breaker is improved, and misoperation of circuit breaker reclosing by other people can be prevented.
As shown in fig. 2, as a preferred scheme, the receiving module is a communication module, the communication module is a 3G, 4G, 5G or wifi module, and the user is connected to the communication module through the mobile intelligent terminal, and the communication module sends the reclosing key instruction to the central processing unit. The reclosing key instruction can be sent to the breaker user by the power supply department through a wireless network or the internet, for example, the power supply department can send a reclosing key instruction matched with the preset key instruction to the mobile intelligent client of the user in a short message or public number information prompting mode after the breaker is overloaded and tripped. Here, the mobile intelligent terminal may be a mobile phone or other electronic equipment with a communication function.
As a preferred scheme, a two-dimensional code label is arranged on the outer surface of the intelligent load limiting universal circuit breaker, a user scans the two-dimensional code label through a mobile intelligent terminal to open a reclosing small program, the reclosing small program is used for inputting a reclosing key instruction, and then the reclosing small program sends the reclosing key instruction to the communication module.
As another optional scheme, the receiving module is a key input module, a user inputs a reclosing key instruction to the central processing unit on site through the key input module, and the reclosing actuating mechanism is a reclosing relay.
Example three:
as shown in fig. 1, an intelligent load-limiting universal circuit breaker comprises a circuit breaker control unit, a tripper and a reclosing action mechanism, wherein the control unit comprises a three-phase current sampling module and a central processing unit, the three-phase current sampling module is used for detecting a current signal on a circuit breaker leading-out terminal and sending the current signal to the central processing unit, the central processing unit analyzes and identifies whether the current on the circuit breaker leading-out terminal reaches a load-limiting threshold value, when the current on the circuit breaker leading-out terminal exceeds the load-limiting threshold value, the central processing unit controls the working of the tripper and opens a circuit breaker, the reclosing action mechanism is connected with the output end of the central processing unit, the control unit further comprises a receiving module, the receiving module is used for receiving a reclosing key instruction sent by a user and sending the reclosing key instruction to the central processing unit, and the central processing unit analyzes and identifies whether the reclosing key instruction is connected with a preset key And if the reclosing key instruction is consistent with the preset key instruction, the central processing unit executes a reclosing program to control the reclosing mechanism to carry out reclosing operation of the circuit breaker.
In the present embodiment, the load limiting gate value is set between 1.05 times and 1.2 times the rated current. When a user inputs a reclosing key instruction to carry out multiple reclosing and still detects the current overload of the circuit breaker, the central processing unit refuses to execute a reclosing program to carry out a thermal memory state, and the circuit breaker cannot be closed in the thermal memory state of the central processing unit. The control unit comprises a telephone function module, alarm information and a telephone number are arranged in the telephone function module, and after the circuit breaker cannot execute reclosing, the central processing unit starts a telephone alarm program and sends alarm information to the telephone number arranged in the telephone function module.
When the current value acquired by the three-phase current acquisition module is analyzed and compared by the central processing unit to be larger than the set load limiting threshold value, the central processing unit drives the tripper driving circuit to enable the tripper coil to work and enable the circuit breaker to carry out brake opening operation. After the first switching-off of the circuit breaker is confirmed, the central processing unit receives a reclosing key instruction sent by a user through the receiving module, then whether the reclosing key instruction is consistent with a preset key instruction or not is analyzed and judged, if so, a reclosing program is executed after five minutes of delay, and the automatic reclosing mechanism is controlled to carry out reclosing operation of the circuit breaker.
After the circuit breaker is switched on, the three-phase sampling module continuously samples the three-phase current of the circuit breaker, the sampled current signal is still larger than the set load limiting threshold value after being analyzed by the central processing unit, and then the tripper coil works again by driving the tripper driving circuit, so that the circuit breaker is switched off for the second time. After the circuit breaker is confirmed to be opened for the second time, the central processing unit receives a reclosing key instruction sent by a user through the receiving module, then analyzes and judges whether the reclosing key instruction is consistent with a preset key instruction, if so, executes a reclosing program again after seven-minute delay, and controls the automatic reclosing mechanism to carry out reclosing operation of the circuit breaker.
After the circuit breaker is switched on, the three-phase sampling module carries out third sampling on three-phase current of the circuit breaker, the sampled current signal is analyzed by the central processing unit to be still larger than a set load limiting threshold value, and then the tripper driving circuit is driven to enable a tripper coil to work for the third time, so that the circuit breaker is switched off for the third time. After the third switching-off of the circuit breaker is confirmed, the central processing unit receives a reclosing key instruction sent by a user through the receiving module, then whether the reclosing key instruction is consistent with a preset key instruction or not is analyzed and judged, if so, a reclosing program is executed for the third time after ten minutes of delay, and the automatic reclosing mechanism is controlled to carry out reclosing operation of the circuit breaker.
And if the three-phase current signal of the circuit breaker collected by the three-phase current sampling module for the fourth time is still larger than the load limiting threshold value after being analyzed and compared by the central processing unit, the tripper coil is made to work for the fourth time, the circuit breaker is made to open the brake, and the load limiting control program is completed. After that, the CPU refuses to execute the reclosing program and enters a thermal memory state. The breaker can not be switched on in the thermal memory state of the central processing unit. At this time, the central processing unit starts a telephone alarm program and sends alarm information to the built-in telephone number. The time of the breaker in the thermal memory state can be set to be 30 minutes or more, and after the thermal memory message is sent, the breaker can perform closing operation.
In the embodiment, because the reclosing mechanism and the receiving module are arranged in the load limiting circuit breaker, when the power of a power grid used by a user is overloaded, the circuit breaker is firstly subjected to opening operation, then the central processing unit analyzes and judges whether a reclosing key instruction input by the user is consistent with a preset key instruction, and only under the condition that the reclosing key instruction is consistent with the preset key instruction, the central processing unit is used for reclosing the circuit breaker, so that the overload power consumer is given the opportunity of self-checking, and the contradiction that the power supply department can recover power supply by matching with the user on site after the circuit breaker is overloaded and tripped between the power supply department and the user is solved. In addition, a user can enable the circuit breaker to be reclosed through a reclosing key instruction party, and the power supply part door only needs to send the reclosing key instruction to the user in a wireless network or internet mode, so that the user can be given the opportunity of self-checking and power supply recovery of circuit breaker reclosing, the intelligentization degree of the circuit breaker is improved, and misoperation of circuit breaker reclosing by other people can be prevented.
As shown in fig. 2, as a preferred scheme, the receiving module is a communication module, the communication module is a 3G, 4G, 5G or wifi module, and the user is connected to the communication module through the mobile intelligent terminal, and the communication module sends the reclosing key instruction to the central processing unit. The reclosing key instruction can be sent to the breaker user by the power supply department through a wireless network or the internet, for example, the power supply department can send a reclosing key instruction matched with the preset key instruction to the mobile intelligent client of the user in a short message or public number information prompting mode after the breaker is overloaded and tripped. Here, the mobile intelligent terminal may be a mobile phone or other electronic equipment with a communication function.
As a preferred scheme, a two-dimensional code label is arranged on the outer surface of the intelligent load limiting universal circuit breaker, a user scans the two-dimensional code label through a mobile intelligent terminal to open a reclosing small program, the reclosing small program is used for inputting a reclosing key instruction, and then the reclosing small program sends the reclosing key instruction to the communication module. The reclosing key command is input by scanning the two-dimensional code to open the reclosing small program, so that a user can conveniently input the reclosing key command to carry out reclosing operation of the circuit breaker.
In this embodiment, when the central processing unit identifies that the current at the outlet terminal of the circuit breaker exceeds the load limit threshold value, the central processing unit randomly generates a preset key instruction and sends the preset key instruction and the overload trip information of the circuit breaker to the power supply department in a wireless network manner through the communication module. And the power supply department analyzes the preset key instruction by using a software program at the background, generates a reclosing key instruction matched with the preset key instruction, and then sends the reclosing key instruction to the user for use in a mobile phone short message mode.
Example four:
the present embodiment is basically the same as the second and third embodiments, except that the reclosing key instruction is not provided by a power supply department, and then is sent to the mobile intelligent terminal of the user through a wireless network in a manner of short message service or public number information prompt.
In this embodiment, when the circuit breaker trips due to overload, the central processing unit generates a temporary preset key instruction and a reclosing key instruction, and sends the reclosing key instruction to a background server of a power supply department. The user acquires a reclosing instruction by accessing a background server of a power supply department, then opens a reclosing applet by scanning the two-dimensional code tag, and inputs a reclosing key instruction by using the reclosing applet or inputs the reclosing key instruction by using the key module.
The user can remove the workload of the power supply department by accessing the background server of the power supply department to obtain the reclosing key instruction, so that the working efficiency and the intelligent degree of the circuit breaker are improved.
In summary, the intelligent load limiting universal circuit breaker disclosed by the invention has the following beneficial technical effects:
1. because the reclosing mechanism and the receiving module are arranged in the load limiting circuit breaker, when the power of a power grid used by a user is overloaded, the circuit breaker is opened firstly, then the central processing unit analyzes and judges whether a reclosing key instruction input by the user is consistent with a preset key instruction, and only under the condition that the reclosing key instruction is consistent with the preset key instruction, the central processing unit is the circuit breaker to be reclosed, so that the opportunity of self-checking of an overloaded power consumer is given, and the contradiction problem that the power supply department can restore power supply to the site by matching with the user after the circuit breaker is overloaded and tripped between the power supply department and the user is solved;
2. the user can reclose the circuit breaker by the aid of a reclosing key instruction party, and the power supply department door only needs to send the reclosing key instruction to the user in a wireless network or internet mode, so that the user can be given the opportunity of self-checking and power supply restoration of the reclosing of the circuit breaker, the intelligent degree of the circuit breaker is improved, and misoperation of reclosing of the circuit breaker by other people can be prevented;
3. the reclosing key command is input by scanning the two-dimensional code to open the reclosing small program, so that a user can conveniently input the reclosing key command to carry out reclosing operation of the circuit breaker.
Although the invention has been described above with reference to various embodiments, it should be understood that many changes and modifications may be made without departing from the scope of the invention. That is, the methods, systems, and devices discussed above are examples, and various configurations may omit, replace, or add various processes or components as appropriate. For example, in alternative configurations, the methods may be performed in an order different than that described and/or various components may be added, omitted, and/or combined. Moreover, features described with respect to certain configurations may be combined in various other configurations, as different aspects and elements of the configurations may be combined in a similar manner. Further, elements therein may be updated as technology evolves, i.e., many of the elements are examples and do not limit the scope of the disclosure or claims.
Specific details are given in the description to provide a thorough understanding of the exemplary configurations including implementations. However, configurations may be practiced without these specific details, such as well-known circuits, processes, algorithms, structures, and techniques, which have been shown without unnecessary detail in order to avoid obscuring the configurations. This description provides example configurations only, and does not limit the scope, applicability, or configuration of the claims. Rather, the foregoing description of the configurations will provide those skilled in the art with an enabling description for implementing the described techniques. Various changes may be made in the function and arrangement of elements without departing from the spirit or scope of the disclosure.
It is intended that the foregoing detailed description be regarded as illustrative rather than limiting, and that it be understood that it is the following claims, including all equivalents, that are intended to define the spirit and scope of this invention. The above examples are to be construed as merely illustrative and not limitative of the remainder of the disclosure. After reading the description of the invention, the skilled person can make various changes or modifications to the invention, and these equivalent changes and modifications also fall into the scope of the invention defined by the claims.
Claims (10)
1. An intelligent load-limiting universal circuit breaker comprises a circuit breaker control unit, a tripper and a reclosing action mechanism, wherein the control unit comprises a three-phase current sampling module and a central processing unit, the three-phase current sampling module is used for detecting a current signal on a circuit breaker outlet terminal and sending the current signal to the central processing unit, the central processing unit analyzes and identifies whether the current on the circuit breaker outlet terminal reaches a load-limiting threshold value, when the current on the circuit breaker outlet terminal exceeds the load-limiting threshold value, the central processing unit controls the tripper to work and the circuit breaker to open a brake, the reclosing action mechanism is connected with the output end of the central processing unit, the intelligent load-limiting universal circuit breaker is characterized in that the control unit further comprises a receiving module, the receiving module is used for receiving a reclosing key instruction sent by a user and sending the reclosing key instruction to the central processing unit, and the central processing unit analyzes and identifies whether the reclosing key instruction is consistent with a preset key instruction in the central processing unit, and if the reclosing key instruction is consistent with the preset key instruction, the central processing unit executes a reclosing program to control the reclosing mechanism to carry out reclosing operation of the circuit breaker.
2. The intelligent load-limiting universal circuit breaker as claimed in claim 1, wherein the receiving module is a communication module, the communication module is a 3G, 4G, 5G or wifi module, a user is connected with the communication module through a mobile intelligent terminal, and the communication module sends a reclosing key command to the central processing unit.
3. The intelligent load-limiting universal circuit breaker according to claim 2, wherein a two-dimensional code tag is arranged on the outer surface of the intelligent load-limiting universal circuit breaker, a user scans the two-dimensional code tag through a mobile intelligent terminal to open a reclosing applet, the reclosing applet is used to input a reclosing key command, and then the reclosing applet sends the reclosing key command to the communication module.
4. The intelligent load limiting universal circuit breaker as claimed in claim 1, wherein the receiving module is a key input module, and a user inputs a reclosing key command on site through the key input module.
5. An intelligent load limiting universal circuit breaker according to any one of claims 1 to 4, characterized in that said load limiting gate value is set between 1.05 and 1.2 times the rated current.
6. The intelligent load-limiting universal circuit breaker as claimed in claim 5, wherein in case that the current overload of the circuit breaker is still detected by a user performing reclosing for a plurality of times by inputting a reclosing key command, the central processing unit refuses to perform the reclosing procedure, and a thermal memory state is performed in which the circuit breaker cannot be closed.
7. The intelligent load-limiting universal circuit breaker as claimed in claim 6, wherein the control unit comprises a telephone function module, the telephone function module is internally provided with alarm information and a telephone number, and after the circuit breaker cannot execute reclosing, the central processing unit starts a telephone alarm program and sends alarm information to the telephone number internally provided with the telephone function module.
8. The intelligent load limiting universal circuit breaker as claimed in claim 7, wherein the reclosing actuating mechanism is a reclosing relay.
9. The intelligent load limiting universal circuit breaker as claimed in claim 8, wherein the reclosing key command is sent to the mobile intelligent terminal of the user by a short message from the power supply department.
10. The intelligent load limiting universal circuit breaker as claimed in claim 9, wherein the mobile intelligent terminal is a mobile phone.
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| CN110896208B (en) | 2022-04-08 |
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