CN215221733U - Anti-interference electricity system of frequency converter - Google Patents
Anti-interference electricity system of frequency converter Download PDFInfo
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- CN215221733U CN215221733U CN202120825186.XU CN202120825186U CN215221733U CN 215221733 U CN215221733 U CN 215221733U CN 202120825186 U CN202120825186 U CN 202120825186U CN 215221733 U CN215221733 U CN 215221733U
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Abstract
The utility model provides a converter anti-interference electricity system, includes converter and the load of electricity connection, direct current input end and anti-interference electricity device electricity are connected in the converter, and anti-interference electricity device is connected with anti-interference electricity controller electricity, is equipped with the energy storage unit in the anti-interference electricity device, and when anti-interference electricity controller detected the converter power and appears the electric dazzling phenomenon, control energy storage unit to converter internal direct current input end output direct current power supply, maintains direct current voltage's stability. The anti-interference electricity device is connected to the direct current input end of the frequency converter, when the anti-interference electricity device detects that voltage is interrupted or interference electricity occurs at the power supply end in a short time, the energy storage unit in the anti-interference electricity device is controlled to be connected with the direct current input end of the frequency converter, and the stable voltage source of the energy storage unit provides instantaneous transition voltage to prevent the frequency converter from tripping due to faults and influencing load work.
Description
Technical Field
The utility model relates to a power consumption equipment safety technical field, especially a converter anti-electricity-dazzling system.
Background
When events such as short circuit, lightning strike, capacitor bank switching, large motor starting, switch operation and the like occur in a power distribution system, voltage sag of the system can be caused. The insulator flashover or discharge to ground in the event of a short circuit fault or a lightning strike results in a supply voltage sag. The sag has a large influence range, the duration time generally exceeds 100mS, the supply voltage can be seriously dropped, the protection device trips to cut off a fault line after the fault occurs, voltage interruption occurs on the line, and voltage sags of different degrees occur on adjacent non-fault lines. The normal operation of voltage-sensitive electrical equipment in the industrial production process is influenced, and even serious economic loss is caused.
In chemical production, the converter is owing to have outstanding speed governing performance and high suitability, by the universal application on fan, pump body isomotor control, the converter input is the three-phase, turn into adjustable direct current through inside direct current after through contravariant frequency modulation control motor, whole working process can simplify to the working method of handing over-direct-handing over, and the converter direct current is comparatively sensitive to external voltage environment, when voltage step-down scope surpasss converter rated voltage operating range, the converter can automatic disconnection and load be connected for the self-protection.
Disclosure of Invention
The utility model aims to solve the technical problem that an anti-interference electricity system of converter is provided can in time adjust when converter mains voltage dips, at converter direct current end input constant voltage power supply, can carry out seamless improvement to interference electricity, voltage short-term interruption scheduling problem in real time.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:
the utility model provides a converter anti-interference electricity system, is including converter and the load of electricity connection, the converter in direct current input end and anti-interference electricity device electricity be connected, anti-interference electricity device and anti-interference electricity controller electricity are connected, be equipped with the energy storage unit in the anti-interference electricity device, when anti-interference electricity controller detects the converter power and appears the electric dazzling phenomenon, control energy storage unit to converter in direct current input end output direct current power supply, maintain direct current voltage's stability.
The anti-interference electricity device comprises a rectifying unit, wherein the input end of the rectifying unit is connected with an alternating current power supply, the direct current output end of the rectifying unit is connected with an energy storage unit, the output end of the energy storage unit is connected with a controlled circuit breaker, and the output end of the controlled circuit breaker is electrically connected with the direct current input end in the frequency converter.
The energy storage unit is internally provided with a capacitor.
The output end of the anti-interference electric controller is electrically connected with a control coil of the controlled circuit breaker, an interference electricity detection relay is arranged on a power supply of the frequency converter, and an auxiliary switch of the interference electricity detection relay is electrically connected with the input end of the anti-interference electric controller.
The anti-interference electric controller adopts a PLC.
The utility model provides a pair of converter anti-interference electricity system inserts anti-interference electricity device through the direct current input at the frequency conversion, detects the power end through anti-interference electricity controller and appears voltage short-term interruption or when shaking the electricity phenomenon, and the energy storage unit in the anti-interference electricity device of control and converter direct current input switch-on provide instantaneous transition voltage through the regulated voltage source of energy storage unit, prevent converter fault tripping operation, influence load work.
Drawings
The invention will be further explained with reference to the following figures and examples:
FIG. 1 is a schematic diagram of the main circuit of the present invention;
FIG. 2 is a schematic diagram of an anti-interference electricity device circuit;
fig. 3 is a schematic diagram of a control circuit according to the present invention.
In the figure: the device comprises a frequency converter 1, a load 2, an anti-interference electricity device 3, a rectifying unit 31, an energy storage unit 32, a controlled circuit breaker 33, an anti-interference electricity controller 4 and an interference electricity detection relay 5.
Detailed Description
As shown in fig. 1-3, an anti-interference electricity system of a frequency converter comprises a frequency converter 1 and a load 2 which are electrically connected, wherein a direct current input end in the frequency converter 1 is electrically connected with an anti-interference electricity device 3, the anti-interference electricity device 3 is electrically connected with an anti-interference electricity controller 4, an energy storage unit 32 is arranged in the anti-interference electricity device 3, and when the anti-interference electricity controller 4 detects interference electricity phenomenon of a power supply of the frequency converter 1, the energy storage unit 32 is controlled to output a direct current power supply to the direct current input end in the frequency converter 1, so as to maintain the stability of direct current voltage.
The anti-interference electricity device 3 comprises a rectifying unit 31, the input end of the rectifying unit 31 is connected with an alternating current power supply, the direct current output end of the rectifying unit 31 is connected with an energy storage unit 32, the output end of the energy storage unit 32 is connected with a controlled circuit breaker 33, the output end of the controlled circuit breaker 33 is electrically connected with the direct current input end in the frequency converter 1, when the voltage of the input power supply is normal, the power supply stores energy to the energy storage unit 32, the controlled circuit breakers 33QF1 and QF2 are disconnected, the frequency converter 1 is powered by the alternating current power supply, but the anti-interference electricity controller 4 controls the controlled circuit breakers 33QF1 and QF2 to be attracted when detecting that the voltage of the alternating current power supply exceeds the range, the energy storage unit 32 provides stable-voltage direct current for the frequency converter 1, and the voltage of the direct current is kept stable.
The energy storage unit 32 is internally provided with a capacitor, the capacitor is charged and discharged quickly, the impedance is small during discharging, the energy storage unit is suitable for instant short-time voltage drop, and the response speed is high.
The output end of the anti-interference electricity controller 4 is electrically connected with the control coil of the controlled circuit breaker 33, the power supply of the frequency converter 1 is provided with an interference electricity detection relay 5, an auxiliary switch of the interference electricity detection relay 5 is electrically connected with the input end of the anti-interference electricity controller 4, and the interference electricity detection relay 5 can use a voltage detection device sold in the market, such as a ZH-44241-34F2 full-isolation direct-current voltage collector produced by shenzhen zhi ji.
The anti-interference controller 4 described above employs a PLC.
Claims (5)
1. An anti-interference electricity system of a frequency converter comprises a frequency converter (1) and a load (2) which are electrically connected, and is characterized in that: the frequency converter is characterized in that a direct current input end in the frequency converter (1) is electrically connected with the anti-interference electricity device (3), the anti-interference electricity device (3) is electrically connected with the anti-interference electricity controller (4), an energy storage unit (32) is arranged in the anti-interference electricity device (3), and when the anti-interference electricity controller (4) detects the interference electricity phenomenon of a power supply of the frequency converter (1), the energy storage unit (32) is controlled to output a direct current power supply to the direct current input end in the frequency converter (1), so that the stability of direct current voltage is maintained.
2. The frequency converter anti-interference electricity system according to claim 1, characterized in that the anti-interference electricity device (3) comprises a rectifying unit (31), the input end of the rectifying unit (31) is connected with an alternating current power supply, the direct current output end of the rectifying unit (31) is connected with an energy storage unit (32), the output end of the energy storage unit (32) is connected with a controlled circuit breaker (33), and the output end of the controlled circuit breaker (33) is electrically connected with the direct current input end in the frequency converter (1).
3. A frequency converter anti-interference electricity system according to claim 2, characterized in that a capacitor is provided in said energy storage unit (32).
4. The frequency converter anti-interference system according to claim 2, characterized in that the output end of the anti-interference controller (4) is electrically connected with the control coil of the controlled circuit breaker (33), the power supply of the frequency converter (1) is provided with an interference detection relay (5), and the auxiliary switch of the interference detection relay (5) is electrically connected with the input end of the anti-interference controller (4).
5. A frequency converter anti-interference electricity system according to claim 4, characterized in that the anti-interference electricity controller (4) adopts PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120825186.XU CN215221733U (en) | 2021-04-21 | 2021-04-21 | Anti-interference electricity system of frequency converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120825186.XU CN215221733U (en) | 2021-04-21 | 2021-04-21 | Anti-interference electricity system of frequency converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215221733U true CN215221733U (en) | 2021-12-17 |
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ID=79449839
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120825186.XU Active CN215221733U (en) | 2021-04-21 | 2021-04-21 | Anti-interference electricity system of frequency converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215221733U (en) |
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2021
- 2021-04-21 CN CN202120825186.XU patent/CN215221733U/en active Active
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