CN211348547U - Circuit for controlling detection contactor by reactive power compensation device - Google Patents
Circuit for controlling detection contactor by reactive power compensation device Download PDFInfo
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- CN211348547U CN211348547U CN201921890624.XU CN201921890624U CN211348547U CN 211348547 U CN211348547 U CN 211348547U CN 201921890624 U CN201921890624 U CN 201921890624U CN 211348547 U CN211348547 U CN 211348547U
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- contactor
- reactive power
- triode
- compensation device
- resistor
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model relates to a reactive power compensator control detects contactor's circuit. The technical problem that in the prior art, a reactive power compensation device can only control a contactor to be attracted and cannot judge whether the contactor is attracted or not is solved. The utility model comprises a contactor, a processor, a triode, a relay and an optocoupler; the control output end of the processor is connected with the base electrode of the triode through the first resistor, the emitting electrode of the triode is grounded, the collecting electrode of the triode is connected with one end of the relay coil, and the other end of the relay coil is connected with the power supply; the main contact of the relay is connected with one end of the contactor coil, and the other end of the contactor coil is connected with a power supply; the normally open contact of the relay is grounded, and the normally closed contact is suspended; the signal detection end of the processor is connected with the secondary of the optocoupler, one primary end of the optocoupler is connected with a power supply through a second resistor, and the other primary end of the optocoupler is connected with one auxiliary contact of the contactor; the other auxiliary contact of the contactor is grounded; one end of the main contact of the contactor is connected with an external capacitor, and the other end of the main contact is connected with the side of a high-voltage power supply.
Description
Technical Field
The utility model relates to an electric power field of making, concretely relates to reactive power compensator control detects contactor's circuit.
Background
The reactive power compensation device is used for supplementing the deficiency of reactive power in a power grid so as to improve the power factor of the power grid, ensure the safe operation of a power system and reduce the electric energy loss, and therefore, the reactive power compensation device has important significance for equipment with low power factor and high electric consumption. At present, a reactive power compensation device switches a capacitor by controlling a contactor, but most of the reactive power compensation devices can only control the contactor to pull in, and whether the contactor is pulled in or not is not judged. If the reactive power compensation device switches the capacitor by controlling the contactor, the inductive reactance and the capacitive reactance of the system generate resonance, so that the voltage of the system is increased, the current is increased, the primary contact of the contactor is damaged, adhesion occurs, the reactive power compensation device cannot control the contactor to be disconnected, the capacitor is saturated for a long time all the time, the capacitor is damaged, and therefore a power accident occurs; if reactive power compensator when switching the electric capacity through control contactor, also can detect contactor and whether actuation, reactive power compensator just knows the unable disconnection of contactor this moment, reports to the police through the backstage and gives maintainer, in time changes the contactor to avoid the long-time work of condenser, lead to the condenser to damage, avoid taking place the electric power accident.
Therefore, it is very important to design a circuit for controlling the detection contactor by the reactive compensation device.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving among the prior art reactive power compensator and can only control the contactor actuation, can't judge the technical problem whether the contactor actuation, and provide a reactive power compensator control detects contactor's circuit.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
the utility model discloses a reactive power compensation device control detection contactor's circuit, the contactor includes main contact, auxiliary contact and contactor coil; the main contact and the auxiliary contact have a linkage relation, and the on/off of the coil of the contactor can trigger the on/off of the main contact and the auxiliary contact; it is characterized in that: the circuit comprises a processor, a triode, a relay and an optocoupler;
the control output end of the processor is connected with the base electrode of the triode through the first resistor, the emitting electrode of the triode is grounded, the collecting electrode of the triode is connected with one end of the relay coil, and the other end of the relay coil is connected with the power supply; the main contact of the relay is connected with one end of the contactor coil, and the other end of the contactor coil is connected with a power supply; the normally open contact of the relay is grounded, and the normally closed contact is suspended;
the signal detection end of the processor is connected with the secondary end of the optocoupler, one end of the primary end of the optocoupler is connected with a power supply through a second resistor, and the other end of the primary end of the optocoupler is connected with an auxiliary contact of the contactor; the other auxiliary contact of the contactor is grounded; one end of the main contact of the contactor is connected with an external capacitor, and the other end of the main contact is connected with the high-voltage power supply side.
Based on above scheme, the utility model discloses still further optimize as follows:
the triode is an NPN triode.
And the base electrode and the emitting electrode of the triode are connected in series through a third resistor.
And the relay coil is connected with a diode arranged in the reverse direction in parallel.
The diode is a schottky diode.
The first resistance value is 330-1000 omega;
the resistance value of the second resistor is 4700-10000 omega;
the third resistor is 4700-10000 omega in resistance.
One secondary end of the optocoupler is grounded; the other end of the secondary of the optocoupler is divided into two paths, one path is connected with a power supply through a fourth resistor, and the other path is connected with a signal detection end of the processor.
The fourth resistor is 4700-10000 omega in resistance.
The utility model has the advantages that:
the utility model provides a pair of reactive power compensator control detects contactor's circuit is not only logic simple, can solve contactor primary contact moreover, the adhesion appears, and reactive power compensator can judge the contactor disconnection, avoids the condenser saturation work for a long time always, leads to the condenser to damage, takes place the power accident problem of supplying power to the safety and stability of system has been guaranteed.
Drawings
Fig. 1 is a schematic circuit diagram of the reactive power compensation device control detection contactor of the present invention.
The reference numbers illustrate:
1-processor, 2-first resistor, 3-third resistor, 4-triode, 5-diode, 6-relay, 7-power supply VCC1, 8-ground signal GND1, 9-power supply 220AC, 10-contactor, 11-external capacitor, 12-power supply VCC2, 13-second resistor, 14-ground signal GND2, 15-optical coupler, 16-fourth resistor, 17-ground signal 220_ GND.
Detailed Description
To make the objects, advantages and features of the present invention clearer, the circuit of the reactive power compensation device control detection contactor according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following detailed description. It should be noted that: the drawings are in a very simplified form and are not to precise scale, and are provided solely for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention; second, the structures shown in the drawings are often part of actual structures.
Example (b):
the utility model relates to a reactive power compensator control detects contactor's circuit's structure as follows:
as shown in fig. 1, the circuit for controlling the detection contactor of the reactive power compensation device of the present invention comprises a processor 1, a connection of a 1-1 terminal of the processor 1 with one end of a first resistor 2 and one end of a third resistor 3, a connection of the other end of the first resistor 2 with a b-stage of a transistor 4, a connection of the other end of the third resistor 3 with an e-stage of the transistor 4 and with a ground signal GND 18, a connection of a c-stage of the transistor 4 with a p-stage of a diode 5 and a 6-1 terminal of a relay 6, a connection of an n-stage of the diode 5 and a 6-2 terminal of the relay 6 with a power VCC 17, a connection of a 6-3 terminal of the relay 6 with a 10-1 terminal of a contactor 10, a connection of a 6-4 terminal of the relay 6 with a ground signal 220_ GND 17, a connection of a 10-5 terminal of the contactor 10 with a high voltage power supply side, a connection of a 10-6 terminal of the contactor, the 10-3 end of the contactor 10 is connected with the 15-4 end of the optical coupler 15, the 10-4 end of the contactor 10 is connected with a ground signal GND 214, the 15-3 end of the optical coupler 15 is connected with one end of the second resistor 13, the other end of the second resistor 13 is connected with a power supply VCC 212, the 15-2 end of the optical coupler 15 is connected with a ground signal GND 18, the 15-1 end of the optical coupler 15 is connected with one end of the fourth resistor 16 and the 1-2 end of the processor 1, and the other end of the fourth resistor 16 is connected with a ground signal GND 18.
The utility model relates to a reactive power compensator control detects contactor's circuit, its theory of operation is:
when the reactive power compensation device controls the attraction contactor (the ends of the main contacts 10-6 and 10-5 are closed), when the control signal of the end 1-1 of the processor 1 is at a high level, the level b of the triode 4 is greater than the level e of the triode 4 by 0.7V, the triode 4 is conducted, the relay 6 attracts, namely the end 6-3 of the relay 6 attracts the end 6-4 of the relay 6, the control coil of the contactor 10 supplies power normally, the coil generates a magnetic field, the end 10-3 of the contactor 10 attracts the end 10-4 of the contactor 10 under the action of the magnetic field, the optical coupler 15 is conducted, and the end 1-2 of the processor 1 detects a low level of the signal. This also indicates that the main contacts 10-6 and 10-5 are properly coupled to the auxiliary contacts 10-3 and 10-4 of the contactor 10 (the main contacts are closed and the auxiliary contacts are closed).
When the reactive power compensation device controls to disconnect the contactor (the end 10-6 and the end 10-5 of the main contact are disconnected), when the end 1-1 of the processor 1 controls the signal level to be low, the level b of the triode 4 and the level e of the triode 4 are 0v, the triode 4 is cut off, the relay 6 is disconnected, namely the end 6-3 of the relay 6 and the end 6-4 of the relay 6 are disconnected, the control coil of the contactor 10 is powered off, the end 10-3 of the contactor 10 and the end 10-4 of the contactor 10 are disconnected, the optical coupler 15 is cut off, and the end 1-2 of the processor 1 detects the signal level. This also indicates that the main contacts 10-6 and 10-5 are properly interlocked with the auxiliary contacts 10-3 and 10-4 of the contactor 10 (the main contacts are open, and the auxiliary contacts are open)
If the attraction capacitor generates resonance, which causes the system voltage to rise, the current to increase, and damages the 10-5 end of the contactor 10, so that the 10-6 end and the 10-5 end of the main contact 10 are adhered, because the 10-6 end and the 10-5 end of the main contact are in linkage relation with the 10-3 end and the 10-4 end of the auxiliary contact 10 of the contactor 10, the 10-3 end of the auxiliary contact 10 and the 10-4 end of the contactor 10 are attracted, at this time, when the reactive compensation device controls to disconnect the contactor 10 and the 1-2 end detection signal of the processor 1 is low level, it can be judged that the contactor is damaged once, the processor 1 sends a background to inform maintenance personnel that the contactor needs to be replaced in time to avoid the capacitor to work for a long time, which causes the capacitor to be damaged, and avoids the power accident.
Claims (8)
1. A circuit for controlling a detection contactor by a reactive power compensation device comprises a main contact, an auxiliary contact and a contactor coil; the main contact and the auxiliary contact have a linkage relation, and the on/off of the coil of the contactor can trigger the on/off of the main contact and the auxiliary contact; the method is characterized in that: the circuit comprises a processor, a triode, a relay and an optocoupler;
the control output end of the processor is connected with the base electrode of the triode through the first resistor, the emitting electrode of the triode is grounded, the collecting electrode of the triode is connected with one end of the relay coil, and the other end of the relay coil is connected with the power supply; the main contact of the relay is connected with one end of the contactor coil, and the other end of the contactor coil is connected with a power supply; the normally open contact of the relay is grounded, and the normally closed contact is suspended;
the signal detection end of the processor is connected with the secondary end of the optocoupler, one end of the primary end of the optocoupler is connected with a power supply through a second resistor, and the other end of the primary end of the optocoupler is connected with an auxiliary contact of the contactor; the other auxiliary contact of the contactor is grounded; one end of the main contact of the contactor is connected with an external capacitor, and the other end of the main contact is connected with the high-voltage power supply side.
2. The reactive power compensation device control detection contactor circuit according to claim 1, wherein: the triode is an NPN triode.
3. The reactive power compensation device control detection contactor circuit according to claim 1, wherein: and the base electrode and the emitting electrode of the triode are connected in series through a third resistor.
4. A reactive power compensation device control detection contactor circuit according to claim 3, wherein: and the relay coil is connected with a diode arranged in the reverse direction in parallel.
5. The reactive power compensation device control detection contactor circuit according to claim 4, wherein: the diode is a schottky diode.
6. The reactive power compensation device control detection contactor circuit according to claim 5, wherein: the first resistance value is 330-1000 omega;
the resistance value of the second resistor is 4700-10000 omega;
the third resistor is 4700-10000 omega in resistance.
7. The reactive power compensation device control detection contactor circuit according to claim 6, wherein: one secondary end of the optocoupler is grounded; the other end of the secondary of the optocoupler is divided into two paths, one path is connected with a power supply through a fourth resistor, and the other path is connected with a signal detection end of the processor.
8. The reactive power compensation device control detection contactor circuit according to claim 7, wherein: the fourth resistor is 4700-10000 omega in resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921890624.XU CN211348547U (en) | 2019-11-05 | 2019-11-05 | Circuit for controlling detection contactor by reactive power compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921890624.XU CN211348547U (en) | 2019-11-05 | 2019-11-05 | Circuit for controlling detection contactor by reactive power compensation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211348547U true CN211348547U (en) | 2020-08-25 |
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ID=72099329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921890624.XU Active CN211348547U (en) | 2019-11-05 | 2019-11-05 | Circuit for controlling detection contactor by reactive power compensation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211348547U (en) |
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2019
- 2019-11-05 CN CN201921890624.XU patent/CN211348547U/en active Active
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