CN214479806U - Coal feeder power supply control circuit - Google Patents
Coal feeder power supply control circuit Download PDFInfo
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- CN214479806U CN214479806U CN202022408898.XU CN202022408898U CN214479806U CN 214479806 U CN214479806 U CN 214479806U CN 202022408898 U CN202022408898 U CN 202022408898U CN 214479806 U CN214479806 U CN 214479806U
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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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The utility model provides a coal feeder power supply control circuit, including main power supply, stand-by power supply, dual power supply switching device, coal feeder control system, the main power supply is unit UPS alternating current power supply, stand-by power supply is unit DC power supply, the AC input end of dual power supply switching device is connected with the main power supply, the DC input end of dual power supply switching device is connected with the stand-by power supply; and the output end of the double-power-supply switching device is connected with the input end of the coal feeder control system. The utility model discloses a feeder power supply control circuit through increasing direct current stand-by power supply and dual power supply switching device, when the UPS alternating current power supply trouble of unit, dual power supply switching device automatic switch-over direct current stand-by power supply, and the voltage waveform through dual power supply switching device output is stable, undisturbed to effectively avoided the feeder to trip because of the control power disturbance.
Description
Technical Field
The utility model relates to a power supply circuit control technical field especially relates to a feeder power control circuit.
Background
At present, a coal feeder control power supply of a thermal power plant generally adopts a unit UPS alternating current power supply, when the control power supply is in failure, the control power supply is low in voltage or the power supply is completely lost, the coal feeder can trip due to the loss of the control power supply, so that a coal mill trips, one path of coal pulverizing system loses effect, great impact is brought to the safe and stable operation of the unit, and the unit can be subjected to unplanned load reduction or unplanned shutdown in severe cases.
In order to solve the technical problem, in the prior art, a mode of adding a bypass power supply is generally adopted, and when a control power supply fails, a unit UPS feeder cabinet switches a unit UPS bypass power supply to supply power to a coal feeder. However, because the components of the coal feeder control system are very sensitive, when the UPS feeder cabinet of the unit supplies power to the UPS bypass power supply of the switching unit, part of the coal feeders trip due to voltage fluctuation, so that the generator unit is not scheduled to stop running, and huge economic loss is caused to a power plant.
SUMMERY OF THE UTILITY MODEL
For solving the technical problem, the utility model provides a feeder power control circuit through increasing direct current stand-by power supply and dual power supply switching device, when the UPS alternating current power supply trouble of unit, dual power supply switching device automatic switch-over direct current stand-by power supply, the switching time is very brief, and voltage waveform through dual power supply switching device output is stable, the disturbance-free to the feeder has effectively been avoided tripping operation because of the control power disturbance.
In order to achieve the above purpose, the utility model provides a coal feeder power supply control circuit, including main power supply, stand-by power supply, dual power supply switching device, coal feeder control system, the main power supply is unit UPS alternating current power supply, stand-by power supply is unit direct current power supply, dual power supply switching device's alternating current input end is connected with the main power supply, dual power supply switching device's direct current input end with stand-by power supply is connected; and the output end of the double-power-supply switching device is connected with the input end of the coal feeder control system. The utility model adopts the UPS as the main power source and the 220V DC as the standby power source, and supplies power to the coal feeder control system through the dual power switching device; if the UPS of the unit is stable, the UPS of the unit is adopted by the double-power-supply switching device to supply power to the control system of the coal feeder; if the UPS of the unit fails, the double-power-supply switching device is automatically switched to the DC standby power supply for supplying power, the switching time is short, and the voltage waveform output by the double-power-supply switching device is undisturbed during power switching, so that tripping of the coal feeder due to control of power disturbance is effectively avoided.
Preferably, the coal feeder power supply control circuit further comprises an alternating current input main switch, and an alternating current input end of the dual power supply switching device is connected with the main power supply through the alternating current input main switch. The utility model arranges the AC input main switch in the power supply control circuit of the coal feeder, when the UPS of the unit fails, the AC input main switch is disconnected, and the AC input main switch is closed after the AC power supply of the UPS of the unit recovers stable, thereby avoiding the tripping of the coal feeder caused by the fluctuation of the AC power supply of the UPS of the unit; in addition, when the dual power supply switching device needs to be overhauled, the AC input main switch is disconnected, so that the AC input of the dual power supply switching device is cut off.
Preferably, the coal feeder power supply control circuit further comprises a direct current input switch, and a direct current input end of the dual power supply switching device is connected with the standby power supply through the direct current input switch. The utility model arranges the DC input switch in the power supply control circuit of the coal feeder, on one hand, when the unit DC power supply fails, the DC input switch is disconnected to overhaul the unit DC power supply; on the other hand, the direct current input switch can be disconnected under the condition that the dual power supply switching device needs to be overhauled, so that the direct current input of the dual power supply switching device is cut off.
Preferably, the dual power switching device is provided with a bypass input end, and the bypass input end of the dual power switching device is connected with the main power supply. The utility model discloses be connected dual power switching device's bypass input and main power supply for under the condition of dual power switching device trouble, feeder control system still can supply power through dual power switching device's bypass circuit, thereby avoids causing the feeder outage because of dual power switching device trouble, has effectively ensured the operation of feeder.
Preferably, the coal feeder power supply control circuit further comprises a direct current input switch, an alternating current input switch, an output switch and a maintenance switch, wherein an alternating current input end of the dual power supply switching device is connected with the main power supply through the alternating current input switch, and a direct current input end of the dual power supply switching device is connected with the standby power supply through the direct current input switch; the output end of the double-power-supply switching device is connected with the input end of the coal feeder control system through the output switch; and the input end of the coal feeder control system is connected with the main power supply through the maintenance switch. The utility model discloses a feeder power control circuit includes dual power switching device's maintenance circuit, overhauls or when changing dual power switching device as needs, disconnection direct current input switch, interchange input switch, output switch, closed maintenance switch to cut off dual power switching device's all input and output, guarantee simultaneously that feeder control system obtains the power supply through the main power source.
Preferably, the coal feeder power supply control circuit further comprises a direct current input switch, an alternating current input switch, an output switch and a maintenance switch, wherein the alternating current input switch is connected with the alternating current input main switch in series, an alternating current input end of the double power supply switching device is connected with the main power supply through the alternating current input switch and the alternating current input main switch, and a direct current input end of the double power supply switching device is connected with the standby power supply through the direct current input switch; the output end of the double-power-supply switching device is connected with the input end of the coal feeder control system through the output switch; and the input end of the coal feeder control system is connected with the main power supply through the overhaul switch and the AC input main switch. The utility model discloses a feeder power control circuit includes dual power supply switching device's maintenance circuit, when needs overhaul or change dual power supply switching device, keeps alternating current input master switch to the closed condition, disconnection direct current input switch, alternating current input switch, output switch, closed maintenance switch to cut off dual power supply switching device's all input/output, guarantee simultaneously that feeder control system obtains the power supply through the main power source.
Preferably, the coal feeder power supply control circuit further comprises a voltage reduction resistor and an indicator light, the voltage reduction resistor and the indicator light are arranged in series, and the voltage reduction resistor and the indicator light are arranged in parallel with the coal feeder control system. The utility model discloses a feeder power control circuit sets up the pilot lamp with the indicating circuit behavior, sets up the decompression resistance so that the pilot lamp obtains suitable voltage simultaneously. The utility model discloses an pilot lamp and decompression resistance can set up suitable position in the circuit as required, also can set up multiunit pilot lamp and decompression resistance in the different position of circuit as required. For example, as a preferred embodiment, the coal feeder power supply control circuit includes a first indicator light, a first voltage reduction resistor, a second indicator light, and a second voltage reduction resistor, the first indicator light is connected in series with the first voltage reduction resistor, and the first voltage reduction resistor and the first indicator light are connected in parallel with the coal feeder control system; the second indicator light is connected with the second voltage reduction resistor in series, and the second voltage reduction resistor and the second indicator light are connected with the main power supply and are arranged in parallel with the dual-power switching device. The preferred embodiment can monitor the operation condition of the main power supply and the whole operation condition of the power supply control circuit of the coal feeder at the same time, when the first indicator light is on and the second indicator light is off, the fault of the main power supply can be judged, and the control system of the coal feeder is powered by the direct-current standby power supply through the double-power-supply switching device.
Preferably, the output switch and the service switch are locked with each other. The utility model discloses a guarantee feeder control system continuously supplies power, set up output switch and maintenance switch and interlock each other, when output switch closed, maintenance switch disconnection, the feeder control system supplies power through dual supply switching device; when the output switch is turned off, the overhaul switch is turned on, and the main power supply supplies power to the coal machine control system.
Preferably, the dual power supply switching device is provided with a power supply input display module. The utility model discloses a dual power supply auto-change over device shows input power source (like one of them of main power supply, stand-by power supply, bypass) through setting up power input display module, and the display mode can be characters, code, pilot lamp etc..
The utility model adopts the UPS as the main power source and the DC as the standby power source, and supplies power to the coal feeder control system through the dual power switching device; when the UPS of the unit fails, the double-power-supply switching device is automatically switched to the DC standby power supply for supplying power, the switching time is short, and the voltage waveform output by the double-power-supply switching device is undisturbed during power switching, so that tripping of the coal feeder due to control power supply disturbance is effectively avoided. Furthermore, the utility model discloses be connected dual power switching device's bypass input and main power supply for under the condition of dual power switching device trouble, coal feeder control system still can supply power through dual power switching device's bypass circuit, thereby avoids causing the coal feeder outage because of dual power switching device trouble, has effectively ensured the operation of coal feeder. Third, the utility model discloses a feeder power control circuit includes dual power switching device's maintenance circuit, overhauls or when changing dual power switching device as needs, cuts off dual power switching device's all input and output through the relevant switch of control, guarantees simultaneously that feeder control system obtains the power supply through the main power source. The technical scheme of the utility model effectively ensured coal feeder control system last the power supply and the stability of voltage, do not have the disturbance, guaranteed unit safe operation, effectively avoided the unplanned shutdown scheduling problem of unit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 shows a circuit diagram of embodiment 1 of the present invention;
fig. 2 shows a circuit diagram of embodiment 2 of the present invention.
Description of the main element symbols:
1-a first voltage reducing resistor; 2-a first indicator light; 3-a second voltage-reducing resistor; 4-second indicator light.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Example 1
Referring to fig. 1, the present embodiment provides a coal feeder power supply control circuit, which includes a main power supply, a backup power supply, a dual power supply switching device AVSP, a coal feeder control system, an ac input master switch QF12 (rated current 16A), a dc input switch QF11 (rated current 6A), an ac input switch QF13 (rated current 10A), an output switch QF14 (rated current 10A), a maintenance switch QF15 (rated current 10A), a first voltage reduction resistor 1, and a first indicator lamp 2, where the main power supply is a unit UPS ac power supply, and the backup power supply is a 220V unit dc power supply; an alternating current input end L, N of the dual power supply switching device is respectively connected with a L, N end of a UPS of the unit through an alternating current input switch QF13 and an alternating current input main switch QF12, a direct current input end of the dual power supply switching device is connected with a 220V unit direct current power supply through a direct current input switch QF11, and a bypass input end of the dual power supply switching device is connected with the UPS of the unit through an alternating current input switch QF13 and an alternating current input main switch QF 12; the output end of the dual-power switching device is connected with the input end of a coal feeder control system (namely a coal feeder control cabinet) through an output switch QF 14; the input end of the coal feeder control system is connected with a UPS (uninterrupted power supply) of the unit through a maintenance switch QF15 and an AC input main switch QF 12; the first pressure reducing resistor 1 and the first indicator light 2 are arranged in series, and the first pressure reducing resistor 1 and the first indicator light 2 are arranged in parallel with the coal feeder control system; the output switch QF14 and the service switch QF15 are locked with each other.
The working principle of the coal feeder power supply control circuit of the embodiment is as follows:
under the normal operation condition, the direct current input switch QF11, the alternating current input main switch QF12, the alternating current input switch QF13 and the output switch QF14 are all closed, the overhaul switch QF15 is disconnected, the coal supply machine control system is powered by the UPS alternating current power supply of the unit through the dual power supply switching device AVSP, and the power supply input display module of the dual power supply switching device AVSP displays main power supply (a main power supply indicator lamp of the power supply input display module is on);
under the condition that a UPS of the unit fails or an AC input main switch QF12 and/or an AC input switch QF13 fails and is disconnected, the dual-power switching device AVSP automatically switches to a 220V unit DC power supply, and a power input display module of the dual-power switching device AVSP displays the standby power supply;
under the condition of the fault of the dual-power switching device AVSP, a UPS alternating current power supply of the unit supplies power to a coal machine control system through a dual-power switching device AVSP bypass input loop, and a power input display module of the dual-power switching device AVSP displays bypass power supply;
under the condition that the dual-power switching device AVSP needs to be overhauled or replaced, the AC input main switch QF12 is kept in a closed state, the DC input switch QF11, the AC input switch QF13, the output switch QF14 are disconnected, the overhaul switch QF15 is closed, and the coal machine control system is directly powered by the UPS (uninterrupted power supply) of the coal machine set;
under the above conditions, the coal feeder control system can normally operate, and a first indicator lamp of the coal feeder power supply control circuit is turned on; when the UPS and the AVSP of the unit fail at the same time, the first indicator light of the coal feeder power supply control circuit is turned off.
Example 2
Referring to fig. 2, the coal feeder power supply control circuit of this embodiment is different from that of embodiment 1 in that a second voltage-reducing resistor 3 and a second indicator lamp 4 are connected in parallel to a bypass input end of a dual power source switching device AVSP, the second voltage-reducing resistor 3 and the second indicator lamp 4 are connected in series, and the rest is the same as that of embodiment 1, and will not be described again.
The working principle of the coal feeder power supply control circuit of the embodiment is the same as that of the embodiment 1. The added second voltage-reducing resistor 3 and the second indicator lamp 4 are used for indicating the running condition of the UPS of the unit, when the first indicator lamp is on and the second indicator lamp is off, the fault of the UPS of the unit can be judged, and the coal feeder control system is powered by a 220V unit direct-current power supply through the double-power-supply switching device.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (8)
1. A coal feeder power supply control circuit is characterized by comprising a main power supply, a standby power supply, a dual-power switching device and a coal feeder control system, wherein the main power supply is a unit UPS alternating current power supply, the standby power supply is a unit direct current power supply, an alternating current input end of the dual-power switching device is connected with the main power supply, and a direct current input end of the dual-power switching device is connected with the standby power supply; and the output end of the double-power-supply switching device is connected with the input end of the coal feeder control system.
2. The coal feeder power supply control circuit of claim 1, further comprising an ac input main switch, wherein the ac input end of the dual power source switching device is connected to the main power supply via the ac input main switch.
3. The coal feeder power supply control circuit of claim 1 or 2, further comprising a DC input switch, wherein the DC input of the dual power source switching device is connected to the backup power source via the DC input switch.
4. The coal feeder power control circuit of claim 1, wherein the dual power switching device is provided with a bypass input, the bypass input of the dual power switching device being connected to the main power supply.
5. The coal feeder power control circuit of claim 1, further comprising a dc input switch, an ac input switch, an output switch, and a service switch, wherein the ac input of the dual power switching device is connected to the main power source via the ac input switch, and the dc input of the dual power switching device is connected to the backup power source via the dc input switch; the output end of the double-power-supply switching device is connected with the input end of the coal feeder control system through the output switch; and the input end of the coal feeder control system is connected with the main power supply through the maintenance switch.
6. The coal feeder power supply control circuit of claim 2, further comprising a dc input switch, an ac input switch, an output switch, and a service switch, wherein the ac input switch is connected in series with the ac input main switch, the ac input end of the dual power switching device is connected to the main power supply via the ac input switch and the ac input main switch, and the dc input end of the dual power switching device is connected to the backup power supply via the dc input switch; the output end of the double-power-supply switching device is connected with the input end of the coal feeder control system through the output switch; and the input end of the coal feeder control system is connected with the main power supply through the overhaul switch and the AC input main switch.
7. The coal feeder power supply control circuit of claim 1, further comprising a voltage reducing resistor and an indicator light, the voltage reducing resistor and the indicator light being arranged in series, the voltage reducing resistor and the indicator light being arranged in parallel with the coal feeder control system.
8. The coal feeder power supply control circuit of claim 5 or 6, wherein the output switch and the service switch are latched to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022408898.XU CN214479806U (en) | 2020-10-26 | 2020-10-26 | Coal feeder power supply control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022408898.XU CN214479806U (en) | 2020-10-26 | 2020-10-26 | Coal feeder power supply control circuit |
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| Publication Number | Publication Date |
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| CN214479806U true CN214479806U (en) | 2021-10-22 |
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| CN202022408898.XU Active CN214479806U (en) | 2020-10-26 | 2020-10-26 | Coal feeder power supply control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114314189A (en) * | 2021-12-30 | 2022-04-12 | 苏州盛虹纤维有限公司 | Control system and control method for windows winding unit |
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2020
- 2020-10-26 CN CN202022408898.XU patent/CN214479806U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114314189A (en) * | 2021-12-30 | 2022-04-12 | 苏州盛虹纤维有限公司 | Control system and control method for windows winding unit |
| CN114314189B (en) * | 2021-12-30 | 2023-11-03 | 苏州盛虹纤维有限公司 | Control system and control method for windows winding unit |
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