CN102709116B - Alternating-current contactor in low-voltage alternating-current control circuit and control method of alternating-current contactor - Google Patents
Alternating-current contactor in low-voltage alternating-current control circuit and control method of alternating-current contactor Download PDFInfo
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- CN102709116B CN102709116B CN201210217348.7A CN201210217348A CN102709116B CN 102709116 B CN102709116 B CN 102709116B CN 201210217348 A CN201210217348 A CN 201210217348A CN 102709116 B CN102709116 B CN 102709116B
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Abstract
The invention particularly relates to an alternating-current contactor in a low-voltage alternating-current control circuit and a control method of the alternating-current contactor. The alternating-current contactor comprises a circuit control switch, a starting run switch, a current output control unit, a direct-current power supply conversion unit, an energy storage unit, a central control unit and electric equipment, wherein a low-voltage alternating-current voltage end L is electrically connected with a K1 of the circuit control unit through an auxiliary switch circuit of the electric equipment; the auxiliary switch circuit is connected in parallel with the starting run switch; a one voltage detection end of the central control unit is electrically connected with the direct-current power supply conversion unit; another voltage detection end of the central control unit is electrically connected with an alternating-current output voltage end A; the voltage end A and a voltage end B are arranged at the two ends of the auxiliary switch circuit; and the central control unit is electrically connected with the circuit control switch, the starting run switch and the energy storage unit respectively. The working state of the electric equipment can be adjusted automatically, and the normal operation of the production process flow is ensured.
Description
Technical field
The present invention relates to A.C. contactor and control method in A.C. contactor intelligent control method when abnormity of power supply, particularly low-voltage alternating-current control loop.
Background technology
A large amount of control elements such as A.C. contactor that use in Industry Control loop, when abnormity of power supply, can cause A.C. contactor to thread off, and affect the normal operation of control loop.In control loop, to access voltage shock avoiding accessory power supply module to prevent that power-supply fluctuation from restart A.C. contactor on the impact of A.C. contactor or when the power up at present, these control modes have only been considered the work of A.C. contactor self, do not consider the impact of A.C. contactor on whole electric power system, from the viewpoint of production technology, how not ensure to greatest extent the normal operation of production process yet.A.C. contactor intelligent control method, when abnormity of power supply but can tolerance range and during the time in system, rely on the energy of inner electric capacity or battery storage to continue to offer direct current energy to A.C. contactor, make A.C. contactor maintenance work, guarantee that power consumption equipment normally moves; When supply voltage surpasses system can tolerance range and during the time, stop, to A.C. contactor power supply, making A.C. contactor out of service, while preventing power up, electric power system is impacted; As out of service because of power-supply fluctuation in A.C. contactor, in the time range allowing, power up is when allowing operating voltage, then the A.C. contactor operation of resetting automatically, resumes work power consumption equipment fast.And voltage shock avoiding accessory power supply module or Restarter are only considered local condition of work, but due to power-supply fluctuation degree difference large (from 0%-80%Ue), as it is many to access voltage shock avoiding accessory power supply module, when voltage is low, large number quipments low-voltage continues operation, excessive to system shock during power up, may cause power supply because protection action has a power failure, result in greater loss, as surpassed power system capacity, also can affect the safety of electric power system; If access voltage shock avoiding accessory power supply module is few, when voltage is high, continue operational outfit few, cause again very large waste, can not guarantee to greatest extent the normal operation of technological process; And Restarter can not keep A.C. contactor work when abnormity of power supply, equipment is out of service, and technological process is interrupted, restarts and loses meaning.
Summary of the invention
The invention provides a kind of can be according to change in voltage situation when abnormity of power supply, automatically adjust power consumption equipment operating state, keep to greatest extent A.C. contactor not out of service with guarantee the normal operation of the technological process of production and to the impact of system in allowed band, can make again A.C. contactor and control method in low-voltage alternating-current control loop that A.C. contactor out of service automatically reworks when voltage recovers.
The technical solution adopted in the present invention is: A.C. contactor in low-voltage alternating-current control loop, it is characterized in that: comprise circuit controls switch, start run switch, electric current output control unit, DC power supply converting unit, energy-storage units, central control unit, power consumption equipment, the two ends that low-voltage AC pressure side L is carried in power consumption equipment by a way switch K1 who provides switching circuit and circuit controls switch for oneself of power consumption equipment, provide switching circuit for oneself and are connected to run switch; Central control unit one tunnel voltage detecting end is electrically connected to DC power supply converting unit, for detection of the voltage of input B; Another road is electrically connected to AC-input voltage end A, and for detection of the voltage of AC-input voltage end A, voltage end A and voltage end B are providing switching circuit two ends for oneself; Central control unit is electrically connected to circuit controls switch, for the switching of control loop control switch K1 and K2; Central control unit is electrically connected to starting run switch, for starting run switch, controls contact E1, E2 closure or disconnects; Central control unit is electrically connected to energy-storage units, for controlling energy-storage units Voltage-output.
Described DC power supply converting unit converts the low-voltage AC from L end to low-voltage DC, by DC power supply converting unit output, to energy-storage units, charge, energy-storage units is electrically connected to the one end of K1 in circuit controls switch by electric current output control unit, by energy-storage units, to power consumption equipment, powers.
The control method of A.C. contactor in low-voltage alternating-current control loop, it is characterized in that: the way switch K1 that low-voltage AC pressure side L, N provide switching circuit, circuit controls switch for oneself by power consumption equipment is carried in A1 and the A2 two ends of power consumption equipment, to power consumption equipment, powers:
When A, power supply are normally worked, the normally closed switch TSB providing for oneself in switching circuit is closed, K switch 1 conducting of central control unit control loop control switch, not conducting of K2, start and once provide the QSB switch in switching circuit for oneself, low-voltage AC transient switching is carried on power consumption equipment, and the A.C. contactor KM two contact KM that make to provide for oneself in switching circuit connect, power consumption equipment is normally worked, and central control unit enters providing the detection of switching circuit both end voltage for oneself;
B, low-voltage ac voltage are greater than the first voltage set point V1, and power supply is normal working voltage, and central control unit does not respond;
C, when low-voltage ac voltage is greater than second voltage set point V2, be less than the first voltage set point V1, power supply is fluctuation operating voltage, central control unit response, K switch 2 conductings of central control unit control loop control switch, not conducting of K1;
D, be less than second voltage set point V2 when low-voltage ac voltage, power supply is irregular working voltage, central control unit response, K switch 1 conducting of central control unit control loop control switch, not conducting of K2, central control unit is controlled off time energy accumulation unit output voltage simultaneously;
E, when low-voltage AC is less than after second voltage set point V2, because voltage is low, provide A.C. contactor KM in switching circuit two contacts for oneself and disconnect, low-voltage ac voltage stops powering to power consumption equipment;
F, central control unit detect B point voltage, when recovering normal in setting-up time T, while being namely greater than the first voltage set point V1, central control unit control switch K1 conducting, not conducting of K2, the contact E1, the E2 that start run switch connect, and reenter new normal operating conditions.
The first described voltage set point V1 is 80% of standard operation voltage.
Described second voltage set point V2 is definite according to power system capacity, and setting range is the 0%-80% of standard operation voltage.
Described standard operation voltage is 220V/380V.
Described setting-up time T scope is 0-10 second.
Advantage of the present invention is: A.C. contactor intelligent control method in low-voltage alternating-current control loop, comprise circuit controls switch, start run switch, electric current output control unit, DC power supply converting unit, energy-storage units, central control unit, power consumption equipment (as A.C. contactor KM etc.), low-voltage AC pressure side A is carried in the two ends of power consumption equipment by a way switch K1 of circuit controls switch, power consumption equipment is electrically connected to the output of electric current output control unit by another way switch K2 of circuit controls switch simultaneously, the input of electric current output control unit is electrically connected to DC power supply converting unit output, DC power supply converting unit output is electrically connected to energy-storage units charging end simultaneously.When power-supply fluctuation but the voltage range that can bear in electric power system and in the time disconnects original current supply circuit, by energy-storage units, to it, powered, maintain A.C. contactor and run well; If power-supply fluctuation exceeds system, can bear voltage range and time, then disconnect energy storage for power supply loop by control switch, turn by original current supply circuit and power, make A.C. contactor because of brownout out of service; If A.C. contactor because of power-supply fluctuation out of service after, within the time of setting, power supply recovers again normally, central control unit 7 is according to the delay time of setting, and controls that to start contact E1, the E2 of run switch closed after time delay, the work of startup A.C. contactor.When the former control end A of power consumption equipment (A.C. contactor KM) disconnects, by control switch, disconnect energy storage for power supply loop, turn by former ac power supply circuit and power, to reach the object stopping.A.C. contactor disconnects original current supply circuit while normally working, by DC power supply converting unit and electric current output control unit, to A.C. contactor, provide DC power supply to reach energy-conservation object, when power-supply fluctuation but the voltage range that can bear in electric power system and in the time continues power supply by energy-storage units; If power-supply fluctuation exceeds system, can bear voltage range and time, by control switch, disconnect direct current power supply loop, turn by former ac power supply circuit and power, make A.C. contactor because of brownout out of service; If A.C. contactor because of power-supply fluctuation out of service after, within the time of setting, voltage recovers again normally, central control unit 7 is according to the delay time of setting, and controls that to start contact E1, the E2 of run switch closed after time delay, the work of startup A.C. contactor.When the former control end A of power consumption equipment disconnects, control switch disconnects energy storage for power supply loop, turns by former ac power supply circuit and powers, to reach the object stopping.
A.C. contactor intelligent control method of the present invention is due to can be according to electric power system voltage fluctuation, automatically adjust the operating state (continuing operation or out of service) of power consumption equipment, when power-supply fluctuation, can make to greatest extent power consumption equipment run well, make the technological process of production unaffected, can not exert an influence to the safety of electric power system again, during power up, can also start fast the power consumption equipment work having stopped, guaranteeing to greatest extent the continuous operation of the technological process of production.
Accompanying drawing explanation
Below in conjunction with accompanying drawing and example, the present invention is further described.
Fig. 1 is the circuit theory diagrams of the embodiment of the present invention;
Fig. 2 is practical application figure of the present invention.
In figure, 1, power consumption equipment; 2, circuit controls switch; 3, start run switch; 4, electric current output control unit; 5, DC power supply converting unit; 6, energy-storage units; 7, central control unit.In dotted line frame, be the control section of A.C. contactor KM, QSB is start button, and TSB is stop button.
Embodiment
As shown in Figure 1, A.C. contactor intelligent control method in low-voltage alternating-current control loop, comprise circuit controls switch 2, start run switch 3, electric current output control unit 4, DC power supply converting unit 5, energy-storage units 6, central control unit 7, power consumption equipment 1, the two ends that low-voltage AC pressure side L is carried in power consumption equipment 1 by a way switch K1 who provides switching circuit (A.C. contactor KM) and control switch 2 for oneself of power consumption equipment 1, provide switching circuit for oneself and are connected to run switch 3; Central control unit 7 one tunnel voltage detecting ends are electrically connected to DC power supply converting unit 5, for detection of the voltage of input B; Another road is electrically connected to AC-input voltage end A, and for detection of the voltage of AC-input voltage end A, voltage end A and voltage end B are providing switching circuit two ends for oneself; Central control unit 7 is electrically connected to circuit controls switch 2, for the switching of control loop control switch 2 K1 and K2; Central control unit 7 is electrically connected to starting run switch 3, for starting run switch 3, controls contact E1, E2 closure or disconnects; Central control unit 7 is electrically connected to energy-storage units 6, for controlling energy-storage units 6 Voltage-outputs.
DC power supply converting unit 5 converts the low-voltage AC from L end to low-voltage DC, by DC power supply converting unit 5 outputs, to energy-storage units 6, charge, energy-storage units 6 is electrically connected to the one end of K2 in circuit controls switch 2 by electric current output control unit 4, by energy-storage units 6, to power consumption equipment 1, powers.
Energy-storage units 6 is the storage batterys that are serially connected with gate-controlled switch, and DC power supply converting unit 5 is AC/DC Switching Power Supplies, and centre control unit 7 is the processors with a/d transducer.
During real work, the way switch K1 that low-voltage AC pressure side L, N provide switching circuit, circuit controls switch 2 for oneself by power consumption equipment 1 is carried in A1 and the A2 two ends of power consumption equipment 1, to power consumption equipment 1 power supply:
When A, power supply are normally worked, the normally closed switch TSB providing for oneself in switching circuit is closed, K switch 1 conducting of central control unit 7 control loop control switchs 2, not conducting of K2, start and once provide the QSB switch in switching circuit for oneself, low-voltage AC transient switching is carried on power consumption equipment 1, and the A.C. contactor KM two contact KM that make to provide for oneself in switching circuit connect, power consumption equipment 1 is normally worked, and central control unit 7 enters providing the detection of switching circuit both end voltage for oneself;
B, low-voltage ac voltage are greater than the first voltage set point V1, and power supply is normal working voltage, and central control unit 7 does not respond;
C, when low-voltage ac voltage is greater than second voltage set point V2, be less than the first voltage set point V1, power supply is fluctuation operating voltage, central control unit 7 response, K switch 2 conductings of central control unit 7 control loop control switchs 2, not conducting of K1,
D, be less than second voltage set point V2 when low-voltage ac voltage, power supply is irregular working voltage, central control unit 7 responses, K switch 1 conducting of central control unit 7 control loop control switchs 2, not conducting of K2, central control unit 7 is controlled off time energy accumulation unit 6 output voltages simultaneously;
E, when low-voltage AC is less than after second voltage set point V2, because voltage is low, provide A.C. contactor KM in switching circuit two contacts for oneself and disconnect, low-voltage ac voltage stops to power consumption equipment 1 power supply;
F, central control unit 7 detect B point voltage, when recovering normal in setting-up time T, while being namely greater than the first voltage set point V1, central control unit 7 control switch K1 conductings, not conducting of K2, the contact E1, the E2 that start run switch 3 connect, and reenter new normal operating conditions.
The first described voltage set point V1 is 80% of standard operation voltage.
Described second voltage set point V2 is definite according to power system capacity, and setting range is the 0%-80% of standard operation voltage.
Standard operation voltage is the nominal value (220V/380V) of low-voltage ac voltage.
Setting-up time T scope is generally 0-10 second, according to field demand, sets.
In the invention process, be designed to modular structure, as the MC1 in Fig. 2, it has 7 tie points, low-voltage AC pressure side L, N, power end A1 and the A2 of power consumption equipment, and the A of control switch 2 end, contact E1 and the E2 of startup run switch.The power end A1 of power consumption equipment and A2 are electrically connected to A1 and the A2 of power consumption equipment, L, N are electrically connected to L, the N of alternating voltage, the A end of control switch 2 is electrically connected to the A end of control loop, and contact E1, the E2 end that starts run switch 3 is electrically connected to the start button two ends of power consumption equipment.
The parts that the present embodiment does not describe in detail and structure belong to well-known components and common structure or the conventional means of the industry, here not narration one by one.
Claims (5)
1. the control method of A.C. contactor in low-voltage alternating-current control loop, it is characterized in that: the way switch K1 that low-voltage AC pressure side L, N provide switching circuit, circuit controls switch (2) for oneself by power consumption equipment (1) is carried in A1 and the A2 two ends of power consumption equipment (1), to power consumption equipment (1), powers:
When A, power supply are normally worked, the normally closed switch TSB providing for oneself in switching circuit is closed, K switch 1 conducting of central control unit (7) control loop control switch (2), not conducting of K2, start and once provide the QSB switch in switching circuit for oneself, it is upper that low-voltage AC transient switching is carried in power consumption equipment (1), and the A.C. contactor KM two contact KM that make to provide for oneself in switching circuit connect, power consumption equipment (1) is normally worked, and central control unit (7) enters providing the detection of switching circuit both end voltage for oneself;
B, low-voltage ac voltage are greater than the first voltage set point V1, and power supply is normal working voltage, and central control unit (7) does not respond;
C, be greater than second voltage set point V2 when low-voltage ac voltage, be less than the first voltage set point V1, power supply is fluctuation operating voltage, central control unit (7) response, K switch 2 conductings of central control unit (7) control loop control switch (2), not conducting of K1;
D, be less than second voltage set point V2 when low-voltage ac voltage, power supply is irregular working voltage, central control unit (7) response, K switch 1 conducting of central control unit (7) control loop control switch (2), not conducting of K2, central control unit (7) is controlled off time energy accumulation unit (6) output voltage simultaneously;
E, when low-voltage AC is less than after second voltage set point V2, because voltage is low, provide A.C. contactor KM in switching circuit two contacts for oneself and disconnect, low-voltage ac voltage stops powering to power consumption equipment (1);
F, central control unit (7) detect B point voltage, when recovering normal in setting-up time T, while being namely greater than the first voltage set point V1, central control unit (7) control switch K1 conducting, not conducting of K2, the contact E1, the E2 that start run switch (3) connect, and reenter new normal operating conditions.
2. the control method of A.C. contactor in low-voltage alternating-current control loop according to claim 1, is characterized in that: the first described voltage set point V1 is 80% of standard operation voltage.
3. the control method of A.C. contactor in low-voltage alternating-current control loop according to claim 1, is characterized in that: described second voltage set point V2 is definite according to power system capacity, and setting range is the 0%-80% of standard operation voltage.
4. the control method of A.C. contactor in low-voltage alternating-current control loop according to claim 2, is characterized in that: described standard operation voltage is 220V/380V.
5. the control method of A.C. contactor in low-voltage alternating-current control loop according to claim 1, is characterized in that: described setting-up time T scope is 0-10 second.
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| CN201210217348.7A CN102709116B (en) | 2012-06-28 | 2012-06-28 | Alternating-current contactor in low-voltage alternating-current control circuit and control method of alternating-current contactor |
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| CN201210217348.7A CN102709116B (en) | 2012-06-28 | 2012-06-28 | Alternating-current contactor in low-voltage alternating-current control circuit and control method of alternating-current contactor |
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| CN102709116B true CN102709116B (en) | 2014-10-29 |
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| CN103280380B (en) * | 2013-06-18 | 2015-06-17 | 西安润辉科技发展有限公司 | Intelligent power control system of alternating current contactor |
| CN103560476B (en) * | 2013-11-22 | 2016-09-21 | 珠海万力达电气自动化有限公司 | A kind of anti-shake electricity module using bypass mode and control method thereof |
| CN103618282B (en) * | 2013-11-26 | 2016-03-16 | 江苏国网自控科技股份有限公司 | The intelligent trip control system of voltage shock avoiding module and control method thereof |
| CN103633860B (en) * | 2013-11-26 | 2016-08-24 | 江苏国网自控科技股份有限公司 | Anti-shake electric installation adaptive control system |
| CN103904984B (en) * | 2014-04-01 | 2016-07-06 | 西安润辉科技发展有限公司 | A kind of voltage shock avoiding motor intelligent manager and method |
| CN111953236B (en) * | 2020-08-17 | 2022-08-30 | 中石化南京工程有限公司 | Circuit for preventing contactor release caused by starting of motor |
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| CN202616141U (en) * | 2012-06-28 | 2012-12-19 | 西安润辉科技发展有限公司 | Alternating current contactor of low-voltage alternating current control loop |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102010002277A1 (en) * | 2010-02-24 | 2011-08-25 | BSH Bosch und Siemens Hausgeräte GmbH, 81739 | Circuit arrangement for operating a household appliance and corresponding method |
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| CN2282746Y (en) * | 1996-12-18 | 1998-05-27 | 石油大学(华东) | Energy-saving motor for pumping unit |
| CN1924743A (en) * | 2005-04-21 | 2007-03-07 | 中国农业科学院农田灌溉研究所 | On-site manual and long-distance remote control method for long-distance remote control system |
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