CN111009875A - Safe power control system - Google Patents
Safe power control system Download PDFInfo
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- CN111009875A CN111009875A CN201911331896.0A CN201911331896A CN111009875A CN 111009875 A CN111009875 A CN 111009875A CN 201911331896 A CN201911331896 A CN 201911331896A CN 111009875 A CN111009875 A CN 111009875A
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- conversion module
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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
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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
- H02H3/10—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 additionally responsive to some other abnormal electrical conditions
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a safe power supply control system which comprises a high-power rectifying module, an isolating transformer, a first DC/AC conversion module, a second DC/AC conversion module and a short-circuit arc-free control circuit, wherein 220V alternating current commercial power is isolated by the isolating transformer and then output to the short-circuit arc-free control circuit, and on the other hand, the 220V alternating current commercial power is output to the first DC/AC conversion module through the high-power rectifying module and is output to the second DC/AC conversion module through a change-over switch. The system can detect abnormal conditions such as line aging, load overload, load short circuit and the like, and can cut off the power supply at the fastest speed when the system detects the dangerous signals, so that no obvious electric arc or obvious spark exists at the short circuit and overload position, and the system cannot be started and is high in safety when the fault is not eliminated.
Description
Technical Field
The invention relates to a control system, in particular to a safe power supply control system.
Background
The electricity brings a lot of benefits to people, the electricity gives people light at night, the electricity gives people cool air for air conditioners in summer, the electricity gives two air conditioners in winter, a factory can operate only when the electricity is available, the people can go out smoothly, the electricity is related to the lives of people, the electricity is available, the patient can be rescued quickly and safely, and the electricity drives the quick development of the society.
The insulation of the wire needs to have certain voltage-withstanding capability, if the current of the wire exceeds the current-carrying capacity, the heating of the wire is intensified, the insulation capability is rapidly reduced, the insulation is accelerated to age, and finally the insulation capability is lost, the wire is broken down by voltage, so that the metal wire core is directly contacted or conducted through electric arc, and the short circuit is called. When the electric wire is short-circuited, abnormal high temperature or electric arc spark is generated to cause nearby combustible substances to fire, which is commonly called an electrical fire.
The power frequency breaking current of the male is 9mA and the power frequency breaking current of the female is 6 mA;
the value of current that can get rid of by itself after an electric shock is called the free current. When the industrial frequency current of 18-22 mA (which is free from the upper limit of the current) passes through the chest of a human body, the induced muscle reaction can stop the breathing of a person who is electrically touched within the electrifying time, and the central nerve of the person who is electrically touched can be temporarily paralyzed. However, once the current is switched off, breathing can resume without adverse consequences from a brief cessation of breathing.
The action current of the national earth leakage protector is 30mA, and the action time is 0.1 second. In many cases after an electric shock, the earth leakage protector still does not operate because the dead person wears shoes or the foot does not contact the ground. Thus, even if the electric shock does not reach 30mA, the leakage device still does not act.
If the s63Ade leakage switch and the Chinese standard 6 square wire exceed 50 m, the wire is heated and ignited, the switch will not trip, because the ignition can not reach the current above 63A. The leakage switch is tripped only when the overload is heated and deformed, and is not tripped when the overload does not reach the heat instantaneously.
Disclosure of Invention
The present invention is directed to a safety power control system to solve the above problems.
In order to achieve the purpose, the invention provides the following technical scheme:
a safety power supply control system comprises a high-power rectification module, an isolation transformer, a first DC/AC conversion module, a second DC/AC conversion module and a short-circuit arc-free control circuit, wherein 220V alternating current commercial power is isolated by the isolation transformer and then output to the short-circuit arc-free control circuit, the 220V alternating current commercial power is output to the second DC/AC conversion module through a change-over switch while being output to the first DC/AC conversion module through the high-power rectification module, the output end of the first DC/AC conversion module and the output end of the second DC/AC conversion module are both connected to a sine wave boosting and voltage stabilizing circuit, the output end of the first DC/AC conversion module is further connected to an overcurrent, undervoltage and overvoltage detection module, the output end of the sine wave boosting and voltage stabilizing circuit is connected to the short-circuit arc-free control circuit, and the output end of the short-circuit, the distribution branch cabinet of the Internet of things is used for controlling a switch of a change-over switch, and the change-over switch is used for controlling whether the high-power rectification module and the second DC/AC conversion module are conducted or not.
As a still further preferable scheme of the present invention, the high-power rectification module is used for converting 220V ac mains power into 48V dc power.
As a still further preferable aspect of the present invention, the first DC/AC conversion module is configured to convert a 48V direct current into a 220V alternating current.
As a still further preferable aspect of the present invention, the second DC/AC conversion module is configured to convert a 48V direct current into a 380V alternating current.
As a further preferable scheme of the invention, the distribution branch cabinet of the internet of things can feed back the switching state of the change-over switch to the safety power cloud platform through software.
As a further preferable scheme of the invention, the short circuit arc-free control circuit comprises a relay KA, a capacitor C1 and a resistor R1, one end of a normally open contact of the relay KA is connected to the capacitor C1, the normally closed contact of the relay KA and one end of 220V alternating current mains supply respectively, the other end of the normally open contact of the relay KA is connected to a load Rfz, the other end of a load Rfz is connected to the other end of the 220V alternating current mains supply, the cathode of a light emitting diode VL, a resistor R2, a coil of the relay KA and the anode of a diode VD3 respectively, the cathode of the diode VD3 is connected to the other end of the coil of the relay KA, the cathode of a diode VD2, a resistor R3 and the capacitor C2 respectively, the other end of the capacitor C2 is connected to the other end of a resistor.
Compared with the prior art, the invention has the beneficial effects that: the system can detect abnormal conditions such as line aging, load overload, load short circuit and the like, and can cut off the power supply at the fastest speed when the system detects the dangerous signals, so that no obvious electric arc or obvious spark exists at the short circuit and overload position, and the system cannot be started and is high in safety when the fault is not eliminated.
Drawings
FIG. 1 is a schematic block diagram of the system of the present invention.
Fig. 2 is a circuit diagram of a short-circuit arcless control circuit according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in 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, in an embodiment of the present invention, a safety power control system includes a high-power rectification module, an isolation transformer, a first DC/AC conversion module, a second DC/AC conversion module, and a short-circuit arc-free control circuit, where on one hand, 220V AC mains power is isolated by the isolation transformer and then output to the short-circuit arc-free control circuit, on the other hand, the 220V AC mains power is output to the first DC/AC conversion module through the high-power rectification module and then output to the second DC/AC conversion module through a transfer switch, an output end of the first DC/AC conversion module and an output end of the second DC/AC conversion module are both connected to a sine wave boost and voltage regulator circuit, an output end of the first DC/AC conversion module is further connected to an over-current, under-voltage, and over-voltage detector module, and an output end of, the output end of the short-circuit arc-free control circuit is connected to the Internet of things distribution branch cabinet, the Internet of things distribution branch cabinet is used for controlling a switch of a change-over switch, and the change-over switch is used for controlling whether the high-power rectifying module and the second DC/AC conversion module are conducted or not.
Referring to fig. 2, the short-circuit arc-free control circuit in the invention includes a relay KA, a capacitor C1, and a resistor R1, where one end of a normally open contact of the relay KA is connected to the capacitor C1, a normally closed contact of the relay KA, and one end of a 220V ac mains supply, the other end of the normally open contact of the relay KA is connected to a load Rfz, the other end of a load Rfz is connected to the other end of the 220V ac mains supply, the cathode of a light emitting diode VL, a resistor R2, a coil of the relay KA, and the anode of a diode VD3, the cathode of a diode VD3 is connected to the other end of the coil of the relay KA, the cathode of a diode VD2, a resistor R3, and a capacitor C2, the other end of the capacitor C2 is connected to.
The high-power rectifying module is used for converting 220V alternating current commercial power into 48V direct current.
The first DC/AC conversion module is used for converting 48V direct current into 220V alternating current.
The second DC/AC conversion module is used for converting the 48V direct current into 380V alternating current.
The distribution branch cabinet of the Internet of things can also feed back the switching state of the change-over switch to the safety power cloud platform through software.
When the system is applied, the voltage condition of the output end of the first DC/AC conversion module is detected by the overcurrent, undervoltage and overvoltage detection module, if abnormal conditions such as line aging, load overload, load short circuit and the like occur, the voltage of the output end of the first DC/AC conversion module detected by the overcurrent, undervoltage and overvoltage detection module has abnormal performance, the abnormal performance is fed back to the first DC/AC conversion module, then the first DC/AC conversion module enables the relay KA in the short-circuit arc-free control circuit to be started through the sine wave boosting and voltage stabilizing circuit, and 220V power supply of the load Rfz is cut off.
Furthermore, when the system is applied, the over-current, under-voltage and over-voltage detection module provides protection functions of fan temperature control, over-temperature protection, output over-voltage, over-current, short circuit and the like, so that after output, load overload and circuit aging are realized, after a circuit is short-circuited, obvious electric arcs and obvious sparks cannot occur, and a fire disaster cannot occur.
The current detection and the coordinated control system inside thing networking distribution branch cabinet design are L1, L2, the mutual inductance of L3 three-phase current detects, set for the upper limit current, when the output short circuit, output load is transshipped, current transformer detects fault current, exceed the upper limit current, the relay action, switch on three-phase solid state relay DC power supply, the normally closed of solid state relay output becomes normally open, the inside overcurrent information that also can receive of intelligence air-break system, close KA or other branch road intelligence air-breaks. Because the double-protection cut-off circuit is adopted, the cut-off time is in millisecond level, and no arc or electric spark exists at the fault occurrence position.
The fault is not relieved, the solid-state relay and the intelligent air switch cannot be reset, and the power supply cannot be output. The branch circuit has faults and does not influence the work of other branch circuits.
This thing networking distribution branch cabinet of system design has the empty system of opening of loRa intelligence, and the secondary is to load short circuit, load overload, the ageing earth leakage protection of circuit to with above-mentioned information access APP and high in the clouds early warning and control.
The first DC/AC conversion module and the second DC/AC conversion module of the system adopt super inverter circuits, if an output line is touched by mistake, no electric shock feeling exists, and the protection end of all mistakenly touched loops can be designed to be about 2mA and can be powered off within 0.001 second. The electric shock information can be uploaded to the APP and the cloud.
When a system breaks down, the 220V bypass circuit is automatically switched on, the bypass circuit is designed to be an isolation transformer, the isolation transformer can also be designed and installed in the distribution branch cabinet of the Internet of things, and the isolated voltage is transmitted to the short-circuit arc-free circuit through sine wave processing. The single-phase no electric shock of power output end that the isolation vary voltage came out, if the circuit of output touched by mistake, there was not the sensation of electric shock, the whole mistake of return circuit touched the protection end and can be designed as about 2mA, can cut off the power supply in 0.001 second.
In conclusion, the system can detect abnormal conditions such as line aging, load overload, load short circuit and the like, and when the system detects the dangerous signals, the power supply can be disconnected at the fastest speed, so that no obvious electric arc or obvious spark exists at the short circuit and overload positions, and when the fault is not eliminated, the system cannot be started and is high in safety.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. A safety power supply control system is characterized by comprising a high-power rectifying module, an isolating transformer, a first DC/AC conversion module, a second DC/AC conversion module and a short-circuit arc-free control circuit, wherein 220V alternating current commercial power is isolated by the isolating transformer and then output to the short-circuit arc-free control circuit, the 220V alternating current commercial power is output to the second DC/AC conversion module through a change-over switch while being output to the first DC/AC conversion module through the high-power rectifying module, the output end of the first DC/AC conversion module and the output end of the second DC/AC conversion module are both connected to a sine wave boosting and voltage stabilizing circuit, the output end of the first DC/AC conversion module is also connected to an overcurrent, undervoltage and overvoltage detection module, and the output ends of the sine wave boosting and voltage stabilizing circuit are connected to the short-circuit arc-, the output end of the short-circuit arc-free control circuit is connected to the Internet of things distribution branch cabinet, the Internet of things distribution branch cabinet is used for controlling a switch of a change-over switch, and the change-over switch is used for controlling whether the high-power rectifying module and the second DC/AC conversion module are conducted or not.
2. The safety power control system of claim 1, wherein the high power rectifier module is configured to convert 220V ac mains power to 48V dc power.
3. The safety power control system of claim 2, wherein the first DC/AC conversion module is configured to convert 48V DC power to 220V AC power.
4. The safety power control system of claim 3, wherein the second DC/AC conversion module is configured to convert 48V DC to 380V AC.
5. The safety power control system of claim 4, wherein the IOT distribution branch cabinet is further capable of feeding back the switch state of the change-over switch to the safety power cloud platform through software.
6. The safety power supply control system according to claim 1, wherein the short-circuit non-arc control circuit comprises a relay KA, a capacitor C1 and a resistor R1, one end of a normally open contact of the relay KA is connected with one end of a 220V alternating current mains supply, the other end of the normally open contact of the relay KA is connected with a load Rfz, the other end of a load Rfz is connected with the other end of the 220V alternating current mains supply, the cathode of a light emitting diode VL, a resistor R2, a coil of the relay KA and the anode of a diode VD3, the cathode of a diode 685vd 2 is connected with the other end of the coil of the relay KA, the cathode of a diode VD2, a resistor R3 and a capacitor C2, the other end of a capacitor C2 is connected with the other end of a resistor R3 and the cathode of a diode VD1, and the anode of a diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911331896.0A CN111009875A (en) | 2019-12-21 | 2019-12-21 | Safe power control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911331896.0A CN111009875A (en) | 2019-12-21 | 2019-12-21 | Safe power control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111009875A true CN111009875A (en) | 2020-04-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911331896.0A Pending CN111009875A (en) | 2019-12-21 | 2019-12-21 | Safe power control system |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2596660Y (en) * | 2002-10-16 | 2003-12-31 | 易达集团挪威总公司 | Rectifying module |
| CN201256127Y (en) * | 2008-09-22 | 2009-06-10 | 福建森达电气有限公司 | High price/performance ratio DC contactor |
| CN102723700A (en) * | 2012-04-24 | 2012-10-10 | 上海诺雅克电气有限公司 | Direct-current contact switch breaking protective circuit and contactor |
| CN203761015U (en) * | 2014-04-11 | 2014-08-06 | 浙江商业职业技术学院 | Electricity utilization protection circuit for students' dormitory |
| CN106300244A (en) * | 2016-09-21 | 2017-01-04 | 四川万康节能环保科技有限公司 | A kind of ozone UV Burdick lamp control system is with from opening and closing overvoltage crowbar |
| CN207410037U (en) * | 2017-08-16 | 2018-05-25 | 丰顺县锦顺科技有限公司 | A kind of intelligent anti-over under-voltage protection circuit |
| CN207853442U (en) * | 2017-12-25 | 2018-09-11 | 河北树航教育科技有限公司 | Teaching experimental equipment safety protective circuit |
-
2019
- 2019-12-21 CN CN201911331896.0A patent/CN111009875A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2596660Y (en) * | 2002-10-16 | 2003-12-31 | 易达集团挪威总公司 | Rectifying module |
| CN201256127Y (en) * | 2008-09-22 | 2009-06-10 | 福建森达电气有限公司 | High price/performance ratio DC contactor |
| CN102723700A (en) * | 2012-04-24 | 2012-10-10 | 上海诺雅克电气有限公司 | Direct-current contact switch breaking protective circuit and contactor |
| CN203761015U (en) * | 2014-04-11 | 2014-08-06 | 浙江商业职业技术学院 | Electricity utilization protection circuit for students' dormitory |
| CN106300244A (en) * | 2016-09-21 | 2017-01-04 | 四川万康节能环保科技有限公司 | A kind of ozone UV Burdick lamp control system is with from opening and closing overvoltage crowbar |
| CN207410037U (en) * | 2017-08-16 | 2018-05-25 | 丰顺县锦顺科技有限公司 | A kind of intelligent anti-over under-voltage protection circuit |
| CN207853442U (en) * | 2017-12-25 | 2018-09-11 | 河北树航教育科技有限公司 | Teaching experimental equipment safety protective circuit |
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Application publication date: 20200414 |