CN115800204A - Circuit breaker closing and opening time control and coil burning prevention system - Google Patents
Circuit breaker closing and opening time control and coil burning prevention system Download PDFInfo
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- CN115800204A CN115800204A CN202211090814.XA CN202211090814A CN115800204A CN 115800204 A CN115800204 A CN 115800204A CN 202211090814 A CN202211090814 A CN 202211090814A CN 115800204 A CN115800204 A CN 115800204A
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Abstract
The invention relates to a circuit breaker switching-on and switching-off time control and coil burning prevention system, which comprises a single chip microcomputer module, a load module and a voltage acquisition module, wherein the voltage acquisition module is used for acquiring working voltage input outside a circuit breaker; the input end of the current acquisition module is connected with the load module, and the output end of the current acquisition module is connected with the single chip microcomputer module; the input end of the singlechip module is connected with the voltage acquisition module; the boosting module is connected with the output end of the single chip microcomputer module; and the alarm module is connected with the output end of the singlechip module, the singlechip module outputs a signal to the alarm module, and the alarm module gives an alarm. By adopting the technical scheme, the invention provides the switching-on and switching-off time control and coil burning prevention system for the circuit breaker, which is used for detecting voltage and current in real time, ensuring the reliable action of a circuit breaker mechanism, reliably ensuring the switching-on and switching-off time of the mechanism, simultaneously protecting a switching-on and switching-off coil from being damaged in time and saving the replacement cost.
Description
Technical Field
The invention relates to the technical field of high-voltage secondary distribution switch operating mechanisms, in particular to a circuit breaker switching-on and switching-off time control and coil burning prevention system in a gas insulated ring main unit.
Background
In a secondary distribution control switch of a high-voltage power system, a breaker has double tasks of control and protection, and the state of the breaker directly influences the safe operation of the power system. The opening and closing time of the circuit breaker directly influences the normal opening and closing function and safe operation of the switch, and is also related to the safe switching of other equipment in the system and the level of internal overvoltage, so that the circuit breaker has great significance in accurate measurement.
The national net/south net has the following requirements on the circuit breaker in the inflatable ring main unit: reliable opening of the Ue at 65%, closing time not more than 60ms, opening time not more than 40ms, and non-operation at 30%. This is particularly difficult at DC 24V.
The existing method comprises the following steps: and performing jumping and adjustment on the force value of a movable iron core reset spring of the electromagnet and the ampere-turns of the coil. The DC24V voltage is 15.6V 65%, 7.2V 30%, the voltage range between reliable opening and non-action is too small, the circuit breaker requires that under 65% of rated voltage, the closing time is less than or equal to 60ms, the opening time is less than or equal to 45ms, the force value of the reset spring is easy to change after being operated for many times, the standard can not be met due to easy deformation in the product transportation process or some deviation of the part size, and the purpose is difficult to achieve by mechanical control.
When the circuit breaker operates, the phenomenon that the mechanical switch cannot be switched to the in-place fire is that the load of the circuit breaker is not matched with the operating mechanism, so that the opening and closing of the circuit breaker are not in place, the coil is burnt out, the circuit breaker can be in a failure state due to the burnt out coil, the stepping opening of the circuit breaker is caused, large-area power failure is caused, and serious consequences such as burning out of power equipment and fire disasters can be caused. When the integrity of the closing loop is damaged, the circuit cannot normally send points, and power supply is hindered.
The prior art solution to coil burn out is to replace the electromagnet, but this adds significantly to the cost of the system.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects of the prior art, the invention provides a circuit breaker switching-on and switching-off time control and coil burning prevention system, which is additionally provided with a voltage acquisition module, a boosting module and a current detection module, detects voltage and current in real time, ensures the reliable action of a circuit breaker mechanism, can reliably ensure the switching-on and switching-off time of the mechanism, can timely protect a switching-on and switching-off coil from being damaged, and saves the replacement cost.
The technical scheme of the invention is as follows: a circuit breaker switching-on and switching-off time control and coil burning prevention system comprises a single chip microcomputer module and a load module, and is characterized by further comprising a circuit breaker switching-on and switching-off time control and coil burning prevention system
The voltage acquisition module is used for acquiring the working voltage input from the outside of the circuit breaker and transmitting the voltage to the single chip microcomputer module;
the current acquisition module is connected with the load module at the input end and connected with the single chip microcomputer module at the output end, and is used for acquiring the current of the load module and transmitting the current to the single chip microcomputer module;
the single chip microcomputer module is provided with a storage unit for storing a set voltage value and a set current value, the voltage acquired by the voltage acquisition module is compared and analyzed with the voltage stored in the storage unit, and the current acquired by the current acquisition module is compared and analyzed with the current stored in the storage unit;
the voltage boosting module is connected with the output end of the single chip microcomputer module, when the single chip microcomputer module detects that the voltage acquired by the voltage acquisition module is within the range of 10V-24V, the single chip microcomputer module outputs a signal to the voltage boosting module, the voltage boosting module boosts the output voltage to 24V and transmits the boosted voltage to an external circuit breaker, and when the single chip microcomputer module detects that the voltage acquired by the voltage acquisition module is 24V, the voltage boosting module does not work, and the output voltage is 24V;
the alarm module is connected with the output end of the single chip microcomputer module, when the single chip microcomputer module detects that the voltage collected by the voltage collection module is lower than 10V or the current collected by the current collection module is larger than the current set in the storage unit or the current passing time exceeds the range of 1.5-2.5S, the single chip microcomputer module outputs a signal to the alarm module, and the alarm module gives an alarm;
and the reset module is connected with the alarm module and used for relieving the alarm.
By adopting the technical scheme, the voltage acquisition module is used for acquiring the working voltage outside the circuit breaker and transmitting the acquired voltage to the single chip microcomputer module, the single chip microcomputer module is used for comparing the acquired voltage with the voltage set in the storage unit, if the acquired voltage is equal to 24V, the boosting module does not work, the output voltage is still 24V, if the acquired voltage is higher than 10V and lower than 24V, the boosting module starts to work, the voltage is even 24V and is transmitted to the circuit breaker, reliable switching on and off of the circuit breaker mechanism under the condition that the voltage of the circuit breaker mechanism is higher than 40% (the circuit breaker input voltage is higher than 65% and reliable switching on and off can be ensured by national standards), stable and reliable switching on and off speed of the mechanism is ensured, and if the acquired voltage is lower than 10V, the output voltage is switched, power is not supplied to the load module, and undervoltage fault output is performed, the breaker mechanism is ensured not to act under the condition that the input voltage of the breaker mechanism is lower than 40 percent (the national standard requires that the input voltage of the breaker mechanism is lower than 30 percent and the opening coil does not act), the dependence and instability of the opening and closing of the breaker mechanism on the mechanism are reduced, the national standard requirement is realized through an electronic mode, the problems existing in the traditional mechanical mode are solved, the current is collected through a current collecting module and is transmitted to a single chip microcomputer module, the single chip microcomputer module can compare the collected current with the current set in a storage unit, when the time of the current collected by the current collecting module is more than 1.5-2.5S greater than the current in the storage unit or the passing current of the coil, the phenomenon that the breaker mechanism is subjected to overload protection or separation and closing refusing is indicated, the voltage output to the coil is cut off, an alarm module starts to work to alarm, the alarm is relieved only through the reset button, the next operation can be carried out, the coil and subsequent electrical components can be well protected, the coil is prevented from being damaged in the operation, or some mechanical structures are forcedly damaged when having a fault, the voltage and the current are detected in real time, the reliable action of the circuit breaker mechanism is ensured, the switching-on and switching-off time of the mechanism can be reliably ensured, meanwhile, the switching-on and switching-off coil can be timely protected from being damaged, and the replacement cost is saved.
The invention further comprises the following steps: the current acquisition module comprises a Hall sensor, the input end of the Hall sensor is respectively connected to the current loop of the load module in series, and the output end of the Hall sensor is connected with the single chip microcomputer module.
By adopting the further arrangement, the current can be better collected, and the collected data is more accurate.
Further setting: the power supply module is connected with the single chip microcomputer module through the voltage reduction circuit and the voltage stabilizing circuit.
Further setting: the motor current protection parameter set by the single-chip microcomputer module is P/125-U-P/70-U.
Further setting: the coil current protection parameter set by the singlechip module is P/125 percent U-P/40 percent U.
Further setting: the energization time of the coil is set to 2S.
By adopting the arrangement, the reliable switch-on of the mechanism coil can be ensured, the coil cannot be influenced when a fault occurs, and the coil can be well protected.
Drawings
FIG. 1 is a system block diagram of an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all directional indicators (such as upper, lower, front and rear \8230;) in the description of the present invention are only used to explain the relative positional relationship between the components, the motion situation, etc. at a certain posture (as shown in the drawing), and if the certain posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a number" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it is necessary that a person skilled in the art can realize the technical solutions, and when the technical solutions are contradictory or cannot be realized, such a combination of the technical solutions should be considered to be absent and not within the protection scope of the present invention.
As shown in figure 1, the switching-on and switching-off time control and coil burning prevention system of the circuit breaker comprises a singlechip module and a load module,
the voltage acquisition module is used for acquiring the working voltage input from the outside of the circuit breaker and transmitting the voltage to the single chip microcomputer module;
the input end of the current acquisition module is connected with the load module, and the output end of the current acquisition module is connected with the single chip microcomputer module, and the current acquisition module is used for acquiring the current of the load module and transmitting the current to the single chip microcomputer module;
the single chip microcomputer module is provided with a storage unit for storing set voltage values and current values, the voltage acquired by the voltage acquisition module is compared with the voltage stored in the storage unit, and the current acquired by the current acquisition module is compared with the current stored in the storage unit;
the boosting module is connected with the output end of the single chip microcomputer module, when the single chip microcomputer module detects that the voltage acquired by the voltage acquisition module is within the range of 10V-24V, the single chip microcomputer module outputs a signal to the boosting module, the boosting module boosts the output voltage to 24V and transmits the boosted voltage to an external circuit breaker, and when the single chip microcomputer module detects that the voltage acquired by the voltage acquisition module is 24V, the boosting module does not work and outputs 24V;
the alarm module is connected with the output end of the single chip microcomputer module, when the single chip microcomputer module detects that the voltage collected by the voltage collection module is lower than 10V or the current collected by the current collection module is larger than the current set in the storage unit or the current passing time exceeds the range of 1.5-2.5S, the single chip microcomputer module outputs a signal to the alarm module, and the alarm module gives an alarm;
and the reset module is connected with the alarm module and used for relieving the alarm.
The voltage acquisition module is used for acquiring the working voltage outside the circuit breaker and transmitting the acquired voltage to the single chip microcomputer module, the single chip microcomputer module is used for comparing the acquired voltage with the voltage set in the storage unit, if the acquired voltage is equal to 24V, the boosting module does not work, the output voltage is still 24V, if the acquired voltage is higher than 10V and lower than 24V, the boosting module starts to work, the voltage is even 24V, and the voltage is transmitted to the circuit breaker, reliable switching-on and switching-off of the circuit breaker mechanism under the condition that the voltage of the circuit breaker mechanism is higher than 40% (the circuit breaker input voltage is higher than 65% and reliable switching-off can be ensured by national standards), stable and reliable switching-on and switching-off speeds of the mechanism are ensured, and if the acquired voltage is lower than 10V, the output voltage is switched, the load module is not powered, and undervoltage fault output is performed, the circuit breaker mechanism is ensured not to act under the condition that the input voltage of the circuit breaker mechanism is lower than 40 percent (the input voltage of the national standard mechanism is lower than 30 percent of the brake separating coil does not act), the dependence and instability of the brake closing and separating of the circuit breaker mechanism on the mechanism are reduced, the national standard requirement is realized through an electronic mode, the problems existing in the traditional mechanical mode are solved, the current is collected through a current collecting module and is transmitted to a single chip microcomputer module, the single chip microcomputer module can compare the collected current with the current set in a storage unit, when the time of the current collected by the current collecting module is more than 1.5-2.5S larger than the current in the storage unit or the passing current of the coil, the phenomenon that the circuit breaker mechanism is overloaded or the phenomena of separation and closing refuses occur is shown, the voltage output to the coil is cut off, the alarm module starts to work to alarm, and only the alarm is relieved through a reset button, the next operation can be carried out, so that the coil and subsequent electric elements can be well protected, the coil is prevented from being damaged in the running process, or a mechanical structure is forcedly damaged when in fault, the voltage and the current are detected in real time, the reliable action of a circuit breaker mechanism is ensured, the switching-on and switching-off time of the mechanism can be reliably ensured, meanwhile, the switching-on and switching-off coil can be timely protected from being damaged, and the replacement cost is saved.
Specifically, the current acquisition module include hall sensor, the hall sensor input is concatenated respectively to load module's current loop, the output is connected with single chip module, can be better gather the electric current, the data of gathering are more accurate.
Further setting: the power supply module is connected with the single chip microcomputer module through the voltage reduction circuit and the voltage stabilizing circuit.
Further setting: the motor current protection parameter set by the singlechip module is P/125 percent U-P/70 percent U, the motor working voltage range specified by the country is 85-110 percent, and in the embodiment, the obtained voltage parameter is 70-125 percent.
Further setting: the coil current protection parameter set by the single chip microcomputer module is P/125-U-P/40% U, the state-specified coil working voltage range is 65-110%, and in the embodiment, the obtained voltage parameter is 40-125%. Where P denotes the rated power of the coil and U denotes the voltage across the coil.
Further setting: the energization time of the coil is set to 2S.
By adopting the arrangement, the reliable switch-on of the mechanism coil can be ensured, the coil cannot be influenced when a fault occurs, and the coil can be well protected.
Claims (6)
1. A circuit breaker switching-on and switching-off time control and coil burning prevention system comprises a single chip microcomputer module and a load module, and is characterized by also comprising a circuit breaker switching-on and switching-off time control and coil burning prevention system
The voltage acquisition module is used for acquiring the working voltage input from the outside of the circuit breaker and transmitting the voltage to the single chip microcomputer module;
the current acquisition module is connected with the load module at the input end and connected with the single chip microcomputer module at the output end, and is used for acquiring the current of the load module and transmitting the current to the single chip microcomputer module;
the single chip microcomputer module is provided with a storage unit and used for storing a set voltage value and a set current value, the voltage collected by the voltage collection module is compared and analyzed with a voltage set value stored in the storage unit, and the current collected by the current collection module is compared and analyzed with a current set value stored in the storage unit;
the boosting module is connected with the output end of the single chip microcomputer module, when the single chip microcomputer module detects that the voltage acquired by the voltage acquisition module is within the range of 10V-24V, the single chip microcomputer module outputs a signal to the boosting module, the boosting module boosts the output voltage to 24V and transmits the boosted voltage to an external circuit breaker, and when the single chip microcomputer module detects that the voltage acquired by the voltage acquisition module is 24V, the boosting module does not work and outputs 24V;
the alarm module is connected with the output end of the single chip microcomputer module, when the single chip microcomputer module detects that the voltage collected by the voltage collection module is lower than 10V or the current collected by the current collection module is larger than the current set in the storage unit or the current passing time exceeds the range of 1.5-2.5S, the single chip microcomputer module outputs a signal to the alarm module, and the alarm module gives an alarm;
and the reset module is connected with the alarm module and used for relieving the alarm.
2. The circuit breaker switching-on and switching-off time control and coil burning prevention system as claimed in claim 1, wherein the current collection module comprises Hall sensors, input ends of the Hall sensors are respectively connected in series to a current loop of the load module, and output ends of the Hall sensors are connected with the single chip microcomputer module.
3. The circuit breaker switching-on and switching-off time control and coil burning prevention system as claimed in claim 1 or 2, further comprising a power supply module, wherein the power supply module is connected with the single chip microcomputer module through a voltage reduction circuit and a voltage stabilizing circuit.
4. The system of claim 3, wherein the protection parameter of the motor current set by the MCU is P/125% -U-P/70% U.
5. The system of claim 4, wherein the coil current protection parameter set by the MCU is P/125-U-P/40-U.
6. The circuit breaker opening and closing time control and coil burning prevention system as claimed in claim 4 or 5, wherein the energization time of the coil is set to 2S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211090814.XA CN115800204A (en) | 2022-09-07 | 2022-09-07 | Circuit breaker closing and opening time control and coil burning prevention system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211090814.XA CN115800204A (en) | 2022-09-07 | 2022-09-07 | Circuit breaker closing and opening time control and coil burning prevention system |
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| Publication Number | Publication Date |
|---|---|
| CN115800204A true CN115800204A (en) | 2023-03-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211090814.XA Pending CN115800204A (en) | 2022-09-07 | 2022-09-07 | Circuit breaker closing and opening time control and coil burning prevention system |
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| Country | Link |
|---|---|
| CN (1) | CN115800204A (en) |
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- 2022-09-07 CN CN202211090814.XA patent/CN115800204A/en active Pending
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