CN110611364A - Automatic dual-power conversion device and method for high-voltage intelligent vacuum circuit breaker - Google Patents
Automatic dual-power conversion device and method for high-voltage intelligent vacuum circuit breaker Download PDFInfo
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- CN110611364A CN110611364A CN201810610856.9A CN201810610856A CN110611364A CN 110611364 A CN110611364 A CN 110611364A CN 201810610856 A CN201810610856 A CN 201810610856A CN 110611364 A CN110611364 A CN 110611364A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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- Power Engineering (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention relates to the technical field of high-voltage electricity, and discloses a dual-power automatic conversion device of a high-voltage intelligent vacuum circuit breaker, which comprises a common power supply S1 and a standby power supply S2, wherein the common power supply S1 is connected with a common power supply switch, the standby power supply S2 is connected with a standby power supply switch, the common power supply S1 and the standby power supply S2 are both electrically connected with a control unit, the control unit is respectively and electrically connected with a detection module and an indicator lamp, the output end of the control unit is electrically connected with a circuit breaker, the input end of the circuit breaker is electrically connected with a power supply output end, and the common power supply switch is provided with a switch metal. The high-voltage intelligent vacuum circuit breaker dual-power automatic switching device and the method improve the reliability of continuous work of a load, reduce the burning loss of the mechanical dual-power switch contact, prolong the service life of the dual-power switch, have low hardware cost and high reliability, accelerate the disconnection speed of the mechanical dual-power switch contact and improve the safety of a system.
Description
Technical Field
The invention relates to the technical field of high-voltage electricity, in particular to a dual-power automatic conversion device and method of a high-voltage intelligent vacuum circuit breaker.
Background
The vacuum circuit breaker is named after the arc extinguishing medium and the insulating medium of the contact gap after arc extinguishing are both high vacuum, and has the advantages of small volume, light weight and no need of maintenance and repair for frequent operation and arc extinguishing, and is relatively popularized in power distribution networks, the vacuum circuit breaker is an indoor power distribution device in a three-phase alternating current system of 3-10 kV and 50Hz, and can be used for protecting and controlling electrical equipment in industrial and mining enterprises, power plants and transformer substations, and is particularly suitable for use places requiring no oil, less maintenance and frequent operation, and the circuit breaker can be arranged in a middle cabinet, a double-layer cabinet and a fixed cabinet to be used for controlling and protecting high-voltage electrical equipment.
In order to meet the continuous power supply requirements of the electric equipment, a double-path power supply scheme is generally adopted, namely, a double-power automatic switching device is utilized to realize the automatic switching of a main power supply and a standby power supply, the double-power automatic switching device generally comprises a detection unit, a control unit and a double-power change-over switch, the detection unit is used for detecting the input voltage of the common power supply and the standby power supply in real time, the control unit controls the double-power change-over switch according to the detection result of the detection unit so as to realize the automatic switching of the common power supply and the standby power supply, the execution logic of the double-power change-over switch is firstly cut off and then closed in the power supply switching process of the conventional double-power automatic switching device, namely, the common power supply is firstly cut off and then the standby power supply is connected, so that the short power cut-off occurs (the switching time of the conventional mechanical switch is usually tens of milliseconds), the short power failure is acceptable for most loads, however, high-sensitive loads exist, and the requirement on the continuity of power supply is very strict, for example, a metal halogen lamp mainly applied to illumination in stadiums or tunnels and the like is a typical sensitive load, the metal halogen lamp is characterized in that after the power failure time exceeds 5 milliseconds, the metal halogen lamp needs to be lightened again after about 10 minutes, obviously, if the power failure suddenly occurs in important sports competitions or engineering construction, great troubles are caused, and therefore, the high-voltage intelligent vacuum circuit breaker dual-power automatic switching device and the method are provided for solving the problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a dual-power automatic conversion device and a dual-power automatic conversion method for a high-voltage intelligent vacuum circuit breaker, which have the advantages of shortening the time of the conventional dual-power automatic conversion device for switching a common power supply and a standby power supply, better meeting the safe power supply requirement of a sensitive load and the like, and solve the problem that the life of people is influenced by short power failure due to the fact that the execution logic of a dual-power transfer switch is firstly disconnected and then connected in the power conversion process of the conventional dual-power automatic conversion device, namely the common power supply is firstly disconnected and then the standby power supply is connected.
(II) technical scheme
In order to achieve the purposes of shortening the time of the conventional dual-power automatic switching device for switching the common power supply and the standby power supply and better meeting the safe power supply requirement of a sensitive load, the invention provides the following technical scheme: the utility model provides a high pressure intelligence vacuum circuit breaker dual supply automatic switching device, includes power S1 and stand-by power supply S2 commonly used, power S1 commonly used is connected with switch commonly used, stand-by power supply S2 is connected with stand-by power supply switch, power S1 commonly used and stand-by power supply S2 all electricity are connected with the control unit, the control unit is electrically connected with detection module and pilot lamp respectively, the output electricity of control unit is connected with the circuit breaker, the input electricity of circuit breaker is connected with power output end.
Preferably, the common power switch is provided with a switch metal sheet and a common power operation mechanism in transmission connection with the switch metal sheet, and the standby power switch is provided with a switch metal sheet and a standby power operation mechanism in transmission connection with the switch metal sheet.
Preferably, the switch metal sheet of the common power switch and the switch metal sheet of the standby power switch are opposite in moving direction, and the linkage rod is movably connected with the switch metal sheet of the common power switch and the switch metal sheet of the standby power switch in a swing rod type, so that a common power supply working position, a standby power supply working position and a power-free working position are formed.
Preferably, the control unit comprises a timer and an intermediate relay, and the control unit is provided with a microcontroller for switching the output contacts and the timer.
Preferably, the common power switch and the standby power switch are both provided with circuit breakers of electric operating mechanisms, and the common power operating mechanism and the standby power operating mechanism are MT electric operating mechanisms.
The invention provides a dual-power automatic switching device and method of a high-voltage intelligent vacuum circuit breaker, which comprises the following steps:
1) the detection unit detects the output voltage of the common power supply S1 and/or the standby power supply S2 connected with the dual power supply changeover switch in real time and transmits the detection result to the control unit.
2) And the control unit calculates the received voltage, judges whether the voltage of the current working power supply is smaller than a preset voltage value, if so, continues to execute the step 1), and if not, transfers to the step 3).
3) The control unit controls the dual power supply change-over switch to switch over the common power supply switch and the standby power supply switch; after two contacts a and b to be disconnected in the dual-power transfer switch are mechanically separated, the auxiliary power supply unit is controlled in a first stage, and the direction of voltage Uab between the contacts a and b is controlled to be a first direction; after the first-stage control target is achieved, the direction of the Uab is reversed to be the control target, and the auxiliary power supply unit is controlled in the second stage.
4) The control unit controls the auxiliary power supply unit to output voltage which enables the load to work normally to the load, the control strategy of the control unit for the inversion unit in the auxiliary unit can adopt various existing control strategies, such as voltage mean value feedback control, voltage single closed loop instantaneous value feedback control, a control method of combining the voltage single closed loop instantaneous value and the voltage mean value, a voltage and current double closed loop control method and the like, and in order to achieve a control target as fast as possible and accordingly fast arc extinction, the control unit controls the inversion unit by using a voltage and current double closed loop control method.
5) When the dual power supply change-over switch completes the switching of the common power supply and the standby power supply, the control unit controls the auxiliary power supply unit to stop outputting to the load, whether the dual power supply change-over switch completes the switching of the common power supply and the standby power supply is detected, the displacement angle of the mechanical switch can be detected, and when the displacement angle reaches a set value, the conversion is judged to be completed; or the self-switching characteristic is realized through a mechanical switch, if the self-inherent switching time is reached, the switching is considered to be finished, and then the step 1) is carried out.
(III) advantageous effects
Compared with the prior art, the invention provides a dual-power automatic switching device and method for a high-voltage intelligent vacuum circuit breaker, which have the following beneficial effects:
1. according to the automatic dual-power switching device and method for the high-voltage intelligent vacuum circuit breaker, the power switch with the electric operating mechanism or the circuit breaker is adopted and connected together through the linkage rod, the online operation of the two electric operating mechanisms is realized through the control circuit, the switching of different switching modes can be realized through the control knob, and since all the parts can be detached and installed respectively, the high reliability and high quality of the product are guaranteed, the cost is low, and the installation is very convenient.
2. According to the high-voltage intelligent vacuum circuit breaker dual-power automatic switching device and the method, any hardware change is not needed to be carried out on the conventional dual-power automatic switching device, only a little adjustment is needed to be carried out on control software of the device, the cost is extremely low, the time that a load works at abnormal low voltage in the switching process is shortened, the reliability of continuous work of the load is improved, the burning loss of a mechanical dual-power switch contact is reduced, the service life of a dual-power switch is prolonged, the hardware cost is low, the method is simple, the reliability is high, the disconnection speed of the mechanical dual-power switch contact is accelerated, and the safety of a.
Drawings
FIG. 1 is a system diagram of a dual power automatic switching device and method for a high-voltage intelligent vacuum circuit breaker according to the present invention;
fig. 2 is a system flow chart of a dual power supply automatic switching device and method of a high-voltage intelligent vacuum circuit breaker according to the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Referring to fig. 1-2, a high-voltage intelligent vacuum circuit breaker dual-power automatic switching device comprises a common power supply S1 and a standby power supply S2, the common power supply S1 is connected with a common power supply switch, the standby power supply S2 is connected with a standby power supply switch, the common power supply S1 and the standby power supply S2 are both electrically connected with a control unit, the control unit is respectively and electrically connected with a detection module and an indicator lamp, the output end of the control unit is electrically connected with a circuit breaker, and the input end of the circuit breaker is electrically connected with a power supply output end.
Preferably, the common power switch is provided with a switch metal sheet and a common power operation mechanism in transmission connection with the switch metal sheet, and the standby power switch is provided with a switch metal sheet and a standby power operation mechanism in transmission connection with the switch metal sheet.
Preferably, the switch metal sheet of the common power switch and the switch metal sheet of the standby power switch are opposite in moving direction, and the linkage rod is movably connected with the switch metal sheet of the common power switch and the switch metal sheet of the standby power switch in a swing rod type, so that a common power supply working position, a standby power supply working position and a power-free working position are formed.
Preferably, the control unit comprises a timer and an intermediate relay, and the control unit is provided with a microcontroller for switching the output contacts and the timer.
Preferably, the common power switch and the standby power switch are both provided with circuit breakers of electric operating mechanisms, and the common power operating mechanism and the standby power operating mechanism are MT electric operating mechanisms.
The invention provides a dual-power automatic switching device and method of a high-voltage intelligent vacuum circuit breaker, which comprises the following steps:
1) the detection unit detects the output voltage of the common power supply S1 and/or the standby power supply S2 connected with the dual power supply changeover switch in real time and transmits the detection result to the control unit.
2) And the control unit calculates the received voltage, judges whether the voltage of the current working power supply is smaller than a preset voltage value, if so, continues to execute the step 1), and if not, transfers to the step 3).
3) The control unit controls the dual power supply change-over switch to switch over the common power supply switch and the standby power supply switch; after two contacts a and b to be disconnected in the dual-power transfer switch are mechanically separated, the auxiliary power supply unit is controlled in a first stage, and the direction of voltage Uab between the contacts a and b is controlled to be a first direction; after the first-stage control target is achieved, the direction of the Uab is reversed to be the control target, and the auxiliary power supply unit is controlled in the second stage.
4) The control unit controls the auxiliary power supply unit to output voltage which enables the load to work normally to the load, the control strategy of the control unit for the inversion unit in the auxiliary unit can adopt various existing control strategies, such as voltage mean value feedback control, voltage single closed loop instantaneous value feedback control, a control method of combining the voltage single closed loop instantaneous value and the voltage mean value, a voltage and current double closed loop control method and the like, and in order to achieve a control target as fast as possible and accordingly fast arc extinction, the control unit controls the inversion unit by using a voltage and current double closed loop control method.
5) When the dual power supply change-over switch completes the switching of the common power supply and the standby power supply, the control unit controls the auxiliary power supply unit to stop outputting to the load, whether the dual power supply change-over switch completes the switching of the common power supply and the standby power supply is detected, the displacement angle of the mechanical switch can be detected, and when the displacement angle reaches a set value, the conversion is judged to be completed; or the self-switching characteristic is realized through a mechanical switch, if the self-inherent switching time is reached, the switching is considered to be finished, and then the step 1) is carried out.
The invention has the beneficial effects that: the high-voltage intelligent vacuum circuit breaker dual-power automatic switching device and the method thereof can realize the on-line operation of two electric operating mechanisms by adopting a power switch with an electric operating mechanism and also can be a circuit breaker and the on-line operation of the two electric operating mechanisms by a linkage rod and the switching of different switching modes by a control knob, because each component can be respectively disassembled and assembled, the high reliability and the high quality of the product are ensured, the cost is low, the installation is very convenient, the prior dual-power automatic switching device does not need to change any hardware, only needs to slightly adjust the control software, has extremely low cost, shortens the time of the abnormal low-voltage work of the load in the switching process, improves the reliability of the continuous work of the load, reduces the burning loss of a mechanical dual-power switch contact, prolongs the service life of the dual-power switch, the method has the advantages of low hardware cost, simplicity and high reliability, quickens the disconnection speed of the mechanical dual-power switch contact, improves the safety of the system, and solves the problems that the current dual-power automatic switching device is disconnected before being switched on in the power switching process, namely, a common power supply is disconnected firstly and then a standby power supply is connected, so that the short power failure can occur and the life of people is influenced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a high pressure intelligence vacuum circuit breaker dual supply automatic switching device, its characterized in that, includes power S1 and stand-by power supply S2 commonly used, power S1 commonly used is connected with switch commonly used, stand-by power supply S2 is connected with stand-by power supply switch, power S1 commonly used and stand-by power supply S2 all electricity are connected with the control unit, the control unit is electrically connected with detection module and pilot lamp respectively, the output electricity of control unit is connected with the circuit breaker, the input electricity of circuit breaker is connected with power output end.
2. The automatic dual-power switching device of the high-voltage intelligent vacuum circuit breaker as claimed in claim 1, wherein the common power switch is provided with a switch metal sheet and a common power operating mechanism in transmission connection with the switch metal sheet, and the standby power switch is provided with a switch metal sheet and a standby power operating mechanism in transmission connection with the switch metal sheet.
3. The automatic dual-power switching device of the high-voltage intelligent vacuum circuit breaker according to claim 1, wherein the movement directions of the switch metal sheet of the common power switch and the switch metal sheet of the standby power switch are opposite, and the linkage rod is movably connected with the switch metal sheet of the common power switch and the switch metal sheet of the standby power switch in a swing rod type, so that a common power supply working position, a standby power supply working position and a power-free working position are formed.
4. The automatic switching device of the double power supplies of the high-voltage intelligent vacuum circuit breaker is characterized in that the control unit comprises a timer and an intermediate relay, and the control unit is provided with the timer and a microcontroller for switching output contacts.
5. The automatic dual-power switching device of the high-voltage intelligent vacuum circuit breaker according to claim 2, wherein the common power switch and the standby power switch are both provided with circuit breakers with electric operating mechanisms, and the common power operating mechanism and the standby power operating mechanism are both MT electric operating mechanisms.
6. A double-power-supply automatic conversion device and method for a high-voltage intelligent vacuum circuit breaker are characterized by comprising the following steps:
1) the detection unit detects the output voltage of a common power supply S1 and/or a standby power supply S2 connected with the dual-power-supply changeover switch in real time and transmits the detection result to the control unit;
2) the control unit calculates the received voltage, judges whether the voltage of the current working power supply is smaller than a preset voltage value, if so, continues to execute the step 1), and if not, transfers to the step 3);
3) the control unit controls the dual power supply change-over switch to switch over the common power supply switch and the standby power supply switch; after two contacts a and b to be disconnected in the dual-power transfer switch are mechanically separated, the auxiliary power supply unit is controlled in a first stage, and the direction of voltage Uab between the contacts a and b is controlled to be a first direction; after the first-stage control target is achieved, the direction of the Uab is reversed to be the control target, and the auxiliary power supply unit is controlled in the second stage;
4) the control unit controls the auxiliary power supply unit to output voltage which enables the load to work normally to the load, the control strategy of the control unit for the inversion unit in the auxiliary unit can adopt various existing control strategies, such as voltage mean value feedback control, voltage single closed loop instantaneous value feedback control, a control method of combining a voltage single closed loop instantaneous value and a voltage mean value, a voltage and current double closed loop control method and the like, and in order to achieve a control target as fast as possible and accordingly fast arc extinction, the control unit controls the inversion unit by using a voltage and current double closed loop control method;
5) when the dual power supply change-over switch completes the switching of the common power supply and the standby power supply, the control unit controls the auxiliary power supply unit to stop outputting to the load, whether the dual power supply change-over switch completes the switching of the common power supply and the standby power supply is detected, the displacement angle of the mechanical switch can be detected, and when the displacement angle reaches a set value, the conversion is judged to be completed; or the self-switching characteristic is realized through a mechanical switch, if the self-inherent switching time is reached, the switching is considered to be finished, and then the step 1) is carried out.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810610856.9A CN110611364A (en) | 2018-06-14 | 2018-06-14 | Automatic dual-power conversion device and method for high-voltage intelligent vacuum circuit breaker |
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| CN201810610856.9A CN110611364A (en) | 2018-06-14 | 2018-06-14 | Automatic dual-power conversion device and method for high-voltage intelligent vacuum circuit breaker |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111725011A (en) * | 2020-06-19 | 2020-09-29 | 浙江曙天电器有限公司 | Double-power automatic change-over switch |
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| CN202153658U (en) * | 2011-07-29 | 2012-02-29 | 珠海市丰兰实业有限公司 | Dual power supply automatic conversion system |
| CN105024450A (en) * | 2015-08-10 | 2015-11-04 | 常熟开关制造有限公司(原常熟开关厂） | Dual-power-source automatic conversion device and conversion control method thereof and dual-power-source power supply system |
| CN204858728U (en) * | 2015-08-10 | 2015-12-09 | 常熟开关制造有限公司(原常熟开关厂） | Two power supply automatic switching devices, dual power supply system |
| CN106410951A (en) * | 2016-10-12 | 2017-02-15 | 常熟开关制造有限公司(原常熟开关厂） | Conversion control method of double power supply automatic conversion device |
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2018
- 2018-06-14 CN CN201810610856.9A patent/CN110611364A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202153658U (en) * | 2011-07-29 | 2012-02-29 | 珠海市丰兰实业有限公司 | Dual power supply automatic conversion system |
| CN105024450A (en) * | 2015-08-10 | 2015-11-04 | 常熟开关制造有限公司(原常熟开关厂） | Dual-power-source automatic conversion device and conversion control method thereof and dual-power-source power supply system |
| CN204858728U (en) * | 2015-08-10 | 2015-12-09 | 常熟开关制造有限公司(原常熟开关厂） | Two power supply automatic switching devices, dual power supply system |
| CN106410951A (en) * | 2016-10-12 | 2017-02-15 | 常熟开关制造有限公司(原常熟开关厂） | Conversion control method of double power supply automatic conversion device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111725011A (en) * | 2020-06-19 | 2020-09-29 | 浙江曙天电器有限公司 | Double-power automatic change-over switch |
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Application publication date: 20191224 |