CN112421758A - Power emergency power supply with anti-interference function - Google Patents
Power emergency power supply with anti-interference function Download PDFInfo
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- CN112421758A CN112421758A CN202011276610.6A CN202011276610A CN112421758A CN 112421758 A CN112421758 A CN 112421758A CN 202011276610 A CN202011276610 A CN 202011276610A CN 112421758 A CN112421758 A CN 112421758A
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- frequency converter
- power supply
- power
- emergency power
- interference function
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- 238000003860 storage Methods 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000004146 energy storage Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 6
- 230000009466 transformation Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Classifications
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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
- H02J9/062—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 for AC powered loads
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from ac mains by converters
Abstract
The invention discloses a power emergency power supply with an anti-interference function, which comprises a frequency converter UF, wherein the input end of the frequency converter UF is connected with a mains supply line, the output end of the frequency converter UF is connected with a motor M, the frequency converter UF is connected with a storage battery group GB connected in parallel with the frequency converter UF, and the storage battery group GB is connected with the mains supply line through a charger C; the power emergency power supply system is widely popularized and applied in China, the capability of resisting sudden power faults of industrial equipment, fire fighting equipment and the like is enhanced, the safe operation of the industrial equipment, the fire fighting equipment and the like is ensured, compared with the operation of driving a motor by a common frequency converter, only one set of energy storage device is added, the emergency power supply system not only can provide an emergency for the motor, but also can achieve the purpose of resisting electric shock, the operation continuity of loads and important loads is powerfully ensured, the equipment and personal accidents caused when the normal power supply is interrupted or the normal production process is damaged are prevented, and unnecessary economic loss is avoided.
Description
Technical Field
The invention relates to an emergency power supply, in particular to a power emergency power supply with an anti-interference function.
Background
In the industries of chemical engineering, metallurgy and the like, when a primary load such as a circulating gas compressor keeps a circulating cooling water or oil system running, because the power load is large, if a power frequency power supply is directly adopted for starting, the starting current of a motor is generally directly started by the power frequency power supply, and the starting current is 6-7 times of the rated current, so mechanical and electrical impact can be generated.
The frequency converter is adopted to drive a motor load to run, and for the voltage transformation, frequency conversion and speed regulation of an asynchronous motor, an indirect voltage transformation and frequency conversion device (an alternating current-direct current voltage frequency conversion device) is used for converting a power frequency alternating current into a direct current through a rectifier and converting the direct current into an alternating current with controllable frequency through an inverter, so the device is also called as a voltage transformation and frequency conversion device or an alternating current-direct current-alternating voltage frequency conversion device with an intermediate direct current link.
Along with the development of society, the demand of people on electric power is more and more obvious, the dependence on electric power in some industrial occasions is more and more large, and industrial process equipment can cause voltage sag when events such as short-circuit faults, induction motor starting, lightning stroke, switch operation, frequency converters, capacitor bank switching and the like occur in a power transmission and distribution system; short-circuit faults, induction motor starting and lightning strike are main reasons for causing voltage sag, insulator flashover or earth discharge caused by the lightning strike can enable a protection device to act, so that power supply voltage sag is caused, the sag influence range is large, and the duration time generally exceeds 100 ms; when the motor is started at full voltage, the current value required to be drawn from a power supply is 500% -800% of that of the motor at full load, when the large current flows through system impedance, the voltage is suddenly reduced, and a short-circuit fault can cause the power supply voltage at the far end of the system to seriously drop, so that the normal work of electrical equipment sensitive to the voltage in the industrial production process is influenced, and even serious economic loss is caused.
As shown in fig. 1, for the current frequency converter circuit principle of driving power equipment power supply, when the voltage is temporarily dropped in an emergency, the DC bus voltage DC in the intermediate link is instantly dropped, and the frequency converter will stop outputting immediately when detecting an abnormality, causing a production shutdown accident, and if a power failure occurs in the power grid power supply system, causing a circulating cooling water or oil system to stop running, causing a production process to be damaged, causing equipment and personal accidents, and avoiding unnecessary economic loss.
Disclosure of Invention
The invention aims to provide a power emergency power supply with an anti-interference function, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the power emergency power supply with the anti-interference function comprises a frequency converter UF, wherein the input end of the frequency converter UF is connected with a mains supply line, the output end of the frequency converter UF is connected with a motor M, the frequency converter UF is connected with a storage battery group GB connected in parallel with the frequency converter UF, and the storage battery group GB is connected with the mains supply line through a charger C.
The frequency converter UF is provided with a rectifying unit Q and an inverting unit T, and the connecting position of the storage battery group GB and the frequency converter UF is located between the rectifying unit Q and the inverting unit T; the frequency converter UF and the charger C are respectively provided with three input ends which respectively correspond to three lines of a fire line, a zero line and a ground line of a mains supply line; and a diode D is arranged on a connecting line of the storage battery GB and the frequency converter UF.
As a preferred embodiment of the present invention: the battery pack GB includes 27 cells of 12V.
Compared with the prior art, the invention has the beneficial effects that: the power emergency power supply system is widely popularized and applied in China, the capability of resisting sudden power faults of industrial equipment, fire fighting equipment and the like is enhanced, the safe operation of the industrial equipment, the fire fighting equipment and the like is ensured, compared with the operation of driving a motor by a common frequency converter, only one set of energy storage device is added, the emergency power supply system not only can provide an emergency for the motor, but also can achieve the purpose of resisting electric shock, the operation continuity of loads and important loads is powerfully ensured, the equipment and personal accidents caused when the normal power supply is interrupted or the normal production process is damaged are prevented, and unnecessary economic loss is avoided.
Drawings
Fig. 1 is a circuit diagram of an emergency power supply in the prior art.
Fig. 2 is a schematic circuit diagram of 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1:
referring to fig. 2, in an embodiment of the present invention, a power emergency power supply with an anti-interference function includes a frequency converter UF, an input end of the frequency converter UF is connected to a mains line, an output end of the frequency converter UF is connected to a motor M, the frequency converter UF is connected to a storage battery group GB connected in parallel to the frequency converter UF, and the storage battery group GB is connected to the mains line through a charger C.
Specifically, the frequency converter UF has a rectifying unit Q and an inverting unit T, and a connection position of the storage battery group GB and the frequency converter UF is located between the rectifying unit Q and the inverting unit T.
When the mains supply is normal, the mains supply enters a rectifying unit Q of the frequency converter UF to be rectified into DC530V direct current electric energy, then the DC530 DC V direct current electric energy is inverted into AC electric energy with adjustable frequency and amplitude through a frequency conversion unit T, the power supply M runs, meanwhile, the mains supply enters a charger C to be rectified into DC530V direct current electric energy, and the storage battery group GB is charged.
The voltage of the mains supply input drops temporarily, and the direct-current voltage rectified by the frequency converter UF drops rapidly. Because the direct current voltage of the storage battery group GB is DC530V which is higher than the direct current voltage rectified by the frequency converter UF, the direct current energy of the storage battery group GB can supplement the direct current voltage of the frequency converter UF in a normal range without interruption, and the normal operation of the frequency converter UF is ensured.
When the commercial power disappears, the charger C and the rectifying unit Q of the frequency converter UF do not output, the direct current electric energy of the storage battery group GB is input into the inverting unit T of the frequency converter UF to be inverted into alternating current electric energy with adjustable frequency and amplitude, and the power supply machine M operates in an emergency mode.
The power emergency power supply system is widely popularized and applied in China, the capability of resisting sudden power faults of industrial equipment, fire fighting equipment and the like is enhanced, the safe operation of the industrial equipment, the fire fighting equipment and the like is ensured, compared with the operation of driving a motor by a common frequency converter, only one set of energy storage device is added, the emergency power supply system not only can provide an emergency for the motor, but also can achieve the purpose of resisting electric shock, the operation continuity of loads and important loads is powerfully ensured, the equipment and personal accidents caused when the normal power supply is interrupted or the normal production process is damaged are prevented, and unnecessary economic loss is avoided.
Further, the frequency converter UF and the charger C each have three input terminals respectively corresponding to three lines of the mains line, namely, a fire line, a zero line and a ground line.
Meanwhile, a diode D is arranged on a connecting line of the storage battery group GB and the frequency converter UF, and the current input from the storage battery group GB to the frequency converter UF is rectified.
Example 2:
on the basis of embodiment 1, the battery pack GB includes 27 batteries of 12V, and meets the power supply requirement.
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 (7)
1. The power emergency power supply with the anti-interference function comprises a frequency converter UF and is characterized in that the input end of the frequency converter UF is connected with a mains supply line, the output end of the frequency converter UF is connected with a motor M, and the frequency converter UF is connected with a storage battery group GB connected with the frequency converter UF in parallel.
2. The power emergency power supply with the anti-interference function as claimed in claim 1, wherein the battery group GB is connected to a commercial power line through a charger C.
3. The power emergency power supply with the anti-interference function as claimed in claim 2, wherein said frequency converter UF has a rectifying unit Q and an inverting unit T.
4. The power emergency power supply with the anti-interference function as claimed in claim 3, wherein the connection position of the storage battery group GB and the frequency converter UF is located between the rectification unit Q and the inversion unit T.
5. The power emergency power supply with anti-interference function as claimed in claim 2, wherein said frequency converter UF and charger C each have three inputs respectively corresponding to three lines of mains, namely fire, zero and ground.
6. The power emergency power supply with the anti-interference function as claimed in claim 4, wherein a diode D is arranged on a connection line between the storage battery group GB and the frequency converter UF.
7. The power-type emergency power supply with the anti-interference function as claimed in claim 4, wherein the battery pack GB comprises 27 batteries of 12V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011276610.6A CN112421758A (en) | 2020-11-16 | 2020-11-16 | Power emergency power supply with anti-interference function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011276610.6A CN112421758A (en) | 2020-11-16 | 2020-11-16 | Power emergency power supply with anti-interference function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112421758A true CN112421758A (en) | 2021-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011276610.6A Pending CN112421758A (en) | 2020-11-16 | 2020-11-16 | Power emergency power supply with anti-interference function |
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| Country | Link |
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| CN (1) | CN112421758A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113315153A (en) * | 2021-05-31 | 2021-08-27 | 广东电网有限责任公司广州供电局 | System, method and device for improving tolerance capability of auxiliary frequency converter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3999077A (en) * | 1975-06-09 | 1976-12-21 | Sola Basic Industries, Inc. | Rectifier-inverter and line voltage regulator system |
| CN2653759Y (en) * | 2002-12-31 | 2004-11-03 | 青岛经济技术开发区创统科技发展有限公司 | Variable frequency emergency power source |
| CN202772650U (en) * | 2012-08-14 | 2013-03-06 | 大连中山海洋消防设备厂 | Emergency power supply for fire-fighting equipment |
| CN202888951U (en) * | 2012-09-29 | 2013-04-17 | 山东金岭化工股份有限公司 | Emergency power supply device reconstructed through frequency converter |
| CN103546133A (en) * | 2013-09-11 | 2014-01-29 | 合肥联信电源有限公司 | Power-type emergency power supply with automatic main/standby motor switching function and operating method |
-
2020
- 2020-11-16 CN CN202011276610.6A patent/CN112421758A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3999077A (en) * | 1975-06-09 | 1976-12-21 | Sola Basic Industries, Inc. | Rectifier-inverter and line voltage regulator system |
| CN2653759Y (en) * | 2002-12-31 | 2004-11-03 | 青岛经济技术开发区创统科技发展有限公司 | Variable frequency emergency power source |
| CN202772650U (en) * | 2012-08-14 | 2013-03-06 | 大连中山海洋消防设备厂 | Emergency power supply for fire-fighting equipment |
| CN202888951U (en) * | 2012-09-29 | 2013-04-17 | 山东金岭化工股份有限公司 | Emergency power supply device reconstructed through frequency converter |
| CN103546133A (en) * | 2013-09-11 | 2014-01-29 | 合肥联信电源有限公司 | Power-type emergency power supply with automatic main/standby motor switching function and operating method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113315153A (en) * | 2021-05-31 | 2021-08-27 | 广东电网有限责任公司广州供电局 | System, method and device for improving tolerance capability of auxiliary frequency converter |
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