CN215733645U - Voltage sag short-time fan motor voltage protection system - Google Patents

Voltage sag short-time fan motor voltage protection system Download PDF

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Publication number
CN215733645U
CN215733645U CN202121820643.2U CN202121820643U CN215733645U CN 215733645 U CN215733645 U CN 215733645U CN 202121820643 U CN202121820643 U CN 202121820643U CN 215733645 U CN215733645 U CN 215733645U
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China
Prior art keywords
frequency converter
fan motor
power supply
electrically connected
voltage
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CN202121820643.2U
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Chinese (zh)
Inventor
刘辉
田梅
刘建军
马海斌
常鹏
严峰
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Shaanxi Yanchang Petroleum Group Co Ltd
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Shaanxi Yanchang Petroleum Group Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/76—Power conversion electric or electronic aspects

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  • Control Of Ac Motors In General (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)
  • Control Of Multiple Motors (AREA)

Abstract

The utility model discloses a voltage protection system of a fan motor with short voltage sag, which comprises a power supply, wherein the power supply is electrically connected with a fan motor frequency converter and provides power for the fan motor frequency converter; the output end of the control power supply is electrically connected with the frequency converter switch; the frequency converter switch is used for starting a fan motor frequency converter; and the frequency converter switch is electrically connected with the fan motor frequency converter and is used for controlling the fan motor frequency converter. The UPS system is used as a control power supply, the current required by the control switch is small, so that one UPS system can control two groups of motor frequency converters at the same time, the use amount of equipment is reduced, and the cost is reduced.

Description

Voltage sag short-time fan motor voltage protection system
Technical Field
The utility model belongs to an electric power system, and particularly relates to a voltage protection system for a voltage sag short-time fan motor.
Background
Because the low-voltage bus in the electrical system is in a single-bus segmented operation mode, the bus-tie switch adopts the spare power automatic switching device, and when the power failure occurs when a certain power supply loop is interrupted due to the short circuit or the external reason of the internal electrical system, the short-time power supply interruption can be caused.
The motor anti-interference technology mainly uses UPS abroad, the method has high cost, is not suitable for a high-power motor, mainly uses EPS domestically, and has high cost and high equipment power when being suitable for the high-power motor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a voltage protection system for a short-time fan motor with voltage sag, which aims to provide short-time low voltage for a motor frequency converter when a power grid fluctuates and ensure the continuous operation of the frequency converter.
The utility model aims to realize the technical means that a voltage protection system for a voltage sag short-time fan motor comprises
A fan motor frequency converter;
the frequency converter switch is electrically connected with the fan motor frequency converter and used for starting and controlling the fan motor frequency converter;
the power supply is electrically connected with the fan motor frequency converter and provides power for the fan motor frequency converter;
and the output end of the control power supply is electrically connected with the frequency converter switch.
The fan motor frequency converter comprises an induced draft fan motor frequency converter and a blower motor frequency converter, and the induced draft fan motor frequency converter and the blower motor frequency converter are both electrically connected with the power supply;
the frequency converter switch comprises a first frequency converter switch and a second frequency converter switch, the first frequency converter switch is electrically connected with the frequency converter of the draught fan motor, and the second frequency converter switch is electrically connected with the frequency converter of the air blower motor.
The power supply is a VSP low-voltage ride-through system rectifier module.
The control power supply is a UPS system.
The power supply is electrically connected with a boosting module, and the boosting module is electrically connected with a fan motor frequency converter.
The power supply electric connection has the module that steps up, and the module that steps up and draught fan motor converter and air-blower motor converter electric connection.
The utility model has the beneficial effects that: 1. through regard as the UPS system as control power, the required electric current of control switch is little for a VSP system rectifier module can control two sets of motor frequency converters simultaneously, has reduced the equipment use amount, the cost is reduced.
2. The boost module is added behind the VSP low-voltage ride-through system rectifying module, so that the capacity required by the VSP low-voltage ride-through system rectifying module storage battery is reduced, the number of required storage battery blocks is reduced, and the cost is reduced.
3. Direct current is output from a rectifying module of the VSP low-voltage ride-through system, the direct current is converted into alternating current through a frequency converter of the motor and then is used by the motor, the VSP low-voltage ride-through system is not used for converting the direct current into the alternating current, a conversion link of the VSP low-voltage ride-through system is removed, and a change link of the frequency converter is adopted, so that the efficiency is improved.
Drawings
Fig. 1 is a schematic flow chart of a voltage protection system for a short-time voltage sag fan motor.
FIG. 1 shows a power supply; 2. controlling a power supply; 3. a frequency converter of a draught fan motor; 4. a blower motor frequency converter; 5. a first inverter switch; 6. a second inverter switch; 7. and a boost module.
The present invention will be described in further detail with reference to the accompanying drawings and examples.
Detailed Description
[ example 1 ]
As shown in figure 1, a voltage protection system for a fan motor with short voltage sag comprises
A fan motor frequency converter;
the frequency converter switch is electrically connected with the fan motor frequency converter and used for starting and controlling the fan motor frequency converter;
the power supply 1 is electrically connected with the fan motor frequency converter and provides power for the fan motor frequency converter;
and the output end of the control power supply 2 is electrically connected with the frequency converter switch.
The power supply 1 provides power for the fan motor frequency converter, and the fan motor frequency converter can still operate when the power supply guarantees electricity interference or voltage sag. The control power supply 2 starts the fan frequency converter through the frequency converter switch, so that the fan motor frequency converter is still in an open state when the electric power is dazzled or the voltage drops temporarily, otherwise, the fan motor frequency converter enters a closed state after the power is cut off in a control link, and the fan motor frequency converter cannot work even if the power supply of the power supply 1 link is continuous.
[ example 2 ]
On the basis of example 1, as shown in figure 1,
the draught fan motor frequency converter comprises a draught fan motor frequency converter 3 and a blower motor frequency converter 4, and the draught fan motor frequency converter 3 and the blower motor frequency converter 4 are both electrically connected with the power supply 1;
the frequency converter switch comprises a first frequency converter switch 5 and a second frequency converter switch 6, the first frequency converter switch 5 is electrically connected with the frequency converter 3 of the draught fan motor, and the second frequency converter switch 6 is electrically connected with the frequency converter 4 of the blower motor.
The power supply 1 is a VSP low-voltage ride-through system rectifier module.
The control power supply 2 is a UPS system.
The power supply 1 is electrically connected with a boosting module 7, and the boosting module 7 is electrically connected with a fan motor frequency converter.
The power supply 1 is electrically connected with a boosting module 7, and the boosting module 7 is electrically connected with a draught fan motor frequency converter 3 and an air blower motor frequency converter 4.
As shown in fig. 1, the control power supply 2 is a UPS system, and the UPS device can only have one device for a high-power motor if being used as both a control power supply and a power supply, and when being used as the control power supply 2, the current required for starting the induced draft fan motor frequency converter 3 and the blower motor frequency converter 4 is much smaller than the current required for continuous operation, and because the UPS device is used as the control power supply 2, the UPS device can simultaneously supply power to the induced draft fan motor frequency converter 3 and the blower motor frequency converter 4 and keep on. Thereby reducing the use of one UPS system.
This link has guaranteed that when the electric wire netting had fluctuated, the ring that control draught fan motor converter 3 and air-blower motor converter 4 started keeps stable, guarantees that the converter lasts the operation.
The VSP low-voltage ride-through system rectification module is used as a power supply 1 and drives a frequency converter 3 of a draught fan motor and a frequency converter 4 of an air blower motor to operate, and meanwhile, the output end of the power supply 1 is connected with a boosting module 7 to boost the output, so that the capacity of a storage battery in the VSP low-voltage ride-through system rectification module can be reduced, the number of the storage battery is reduced, and the cost is reduced. The boosting module 7 is connected with the induced draft fan motor frequency converter 3 and the blower motor frequency converter 4, and the boosted current drives the induced draft fan motor frequency converter 3 and the blower motor frequency converter 4 to work.
The voltage boosting module 7 boosts and stabilizes the direct current voltage of the energy storage battery of the VSP low-voltage ride-through system rectification module, and maintains the direct current bus voltage of the frequency converter of the induced draft fan motor 3 and the frequency converter of the blower motor 4 within the allowable range of normal operation of the frequency converters, so that the hydrogen production induced draft fan motor and the hydrogen production blower motor can normally operate during electricity shaking.
Meanwhile, the VSP low-voltage ride-through system has the function of converting alternating current into direct current and then converting the direct current into alternating current. The frequency converter of the fan motor has the function of converting direct current into alternating current, so that direct current output by the VSP low-voltage ride-through system is directly sent to the frequency converter 3 of the draught fan motor and the frequency converter 4 of the blower motor, and the direct current is converted into alternating current by the conversion function of the frequency converters, so that the structural characteristics of the frequency converters are fully utilized, the link of converting alternating current and direct current is reduced, the efficiency is improved, and zero switching of a power supply system during voltage sag is realized. The power supply 1 is therefore also a VSP low voltage ride through system rectifier module, not a VSP low voltage ride through system.
The link ensures that when the power grid fluctuates, a ring for driving the frequency converter 3 of the induced draft fan motor and the frequency converter 4 of the air blower motor to work keeps stable, and the two links together ensure that the frequency converters can continuously run.
When normal operation, draught fan motor converter 3 and air blower motor converter 4 all have the power supply of external facilities, when the electricity dazzling or voltage sag appear, the UPS system is to first converter switch 5 and the power supply of second converter switch 6, guarantee draught fan motor converter 3 and air blower motor converter 4 and be in the on-state, if the converter switch between them is outage, fan motor converter 3 and air blower motor converter 4 then can be in the off-state, even be responsible for the power switch-on of power, fan motor converter 3 and air blower motor converter 4, and fan motor and air blower motor all can be in the shutdown state.
Meanwhile, the VSP low-voltage ride-through system rectification module outputs direct current which is boosted by the boosting module 7 and then is transmitted to the fan motor frequency converter 3 and the blower motor frequency converter 4, and the fan motor frequency converter 3 and the blower motor frequency converter 4 convert the direct current into alternating current to drive the fan motor frequency converter 3 and the blower motor frequency converter 4 to work.
Therefore, the power supply of the fan motor frequency converter 3 and the blower motor frequency converter 4 is ensured, and the control switch is also powered and kept in an opening state.
Through the dual stability of the control link and the power link, the problem that a fan motor is stopped when electricity interference or voltage fluctuation occurs is effectively solved, the continuous operation of the fan is further realized, and the production device is guaranteed not to be stopped when the power grid fluctuates. Meanwhile, only one UPS device is needed, so that the production cost is reduced.
The components and structures of the present embodiments that are not described in detail are well known in the art and do not constitute essential structural elements or elements.

Claims (6)

1. The utility model provides a fan motor voltage protection system for a short time of voltage sag which characterized in that: comprises that
A fan motor frequency converter;
the frequency converter switch is electrically connected with the fan motor frequency converter and used for starting and controlling the fan motor frequency converter;
the power supply (1) is electrically connected with the fan motor frequency converter and provides power for the fan motor frequency converter;
the control power supply (2), control power supply (2) output and converter switch electric connection.
2. The voltage protection system of claim 1, wherein the voltage protection system comprises: the fan motor frequency converter comprises a draught fan motor frequency converter (3) and a blower motor frequency converter (4), and the draught fan motor frequency converter (3) and the blower motor frequency converter (4) are both electrically connected with the power supply (1);
the frequency converter switch comprises a first frequency converter switch (5) and a second frequency converter switch (6), the first frequency converter switch (5) is electrically connected with the frequency converter (3) of the draught fan motor, and the second frequency converter switch (6) is electrically connected with the frequency converter (4) of the air blower motor.
3. A voltage sag short term fan motor voltage protection system according to claim 1 or 2, wherein: the power supply (1) is a VSP low-voltage ride-through system rectifying module.
4. A voltage sag short term fan motor voltage protection system according to claim 1 or 2, wherein: the control power supply (2) is an UPS system.
5. The voltage protection system of claim 1, wherein the voltage protection system comprises: the power supply (1) is electrically connected with a boosting module (7), and the boosting module (7) is electrically connected with a fan motor frequency converter.
6. The voltage protection system of claim 2, wherein the voltage protection system comprises: the power supply (1) is electrically connected with a boosting module (7), and the boosting module (7) is electrically connected with a draught fan motor frequency converter (3) and an air blower motor frequency converter (4).
CN202121820643.2U 2021-08-05 2021-08-05 Voltage sag short-time fan motor voltage protection system Active CN215733645U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121820643.2U CN215733645U (en) 2021-08-05 2021-08-05 Voltage sag short-time fan motor voltage protection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121820643.2U CN215733645U (en) 2021-08-05 2021-08-05 Voltage sag short-time fan motor voltage protection system

Publications (1)

Publication Number Publication Date
CN215733645U true CN215733645U (en) 2022-02-01

Family

ID=79993045

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202121820643.2U Active CN215733645U (en) 2021-08-05 2021-08-05 Voltage sag short-time fan motor voltage protection system

Country Status (1)

Country Link
CN (1) CN215733645U (en)

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Inventor after: Liu Hui

Inventor after: Tian Mei

Inventor after: Liu Jianjun

Inventor after: Feng Haibin

Inventor after: Chang Peng

Inventor after: Yan Feng

Inventor before: Liu Hui

Inventor before: Tian Mei

Inventor before: Liu Jianjun

Inventor before: Ma Haibin

Inventor before: Chang Peng

Inventor before: Yan Feng