Summary of the invention
The object of the present invention is to provide single channel power supply under the primary connection mode of a kind of Yi of being applicable to road work incoming power, three tunnels and following bus connection switch or single channel bus connection switch as factory's (station) use 3kV～10kV bus protection and the failure protection method of the power plant under this section of Power supply mode and transformer station.
To achieve these goals, the present invention has adopted following technical scheme:
3kV～10kV bus protection and a failure protection method are to be applicable to 3kV～10kV bus protection and the failure protection method that single channel power supply under the primary connection mode of Yi road work incoming power, three tunnels and following bus connection switch or single channel bus connection switch are used as the power plant under this section of bus Power supply mode and transformer station; The method is mainly to protect base quantity to form enclosed type overcurrent bus protection and failure protection action basic logic by detection, when bus breaks down, makes corresponding protection action, and bus is protected fast;
Described protection base quantity comprises to be opened into analog quantity, opens into switching value and the amount of outputing, wherein: open the threephase current transformer secondary current, the secondary current of threephase current transformer separately of three road bus connection switches, the bus threephase potential transformer secondary voltage that into analog quantity, comprise a road work incoming power switch; Open into switching value and comprise that the instantaneous locking overcurrent of each outlet contact, bus protection function pressing plate drop into, bus failure protection function pressing plate drops into; The amount of outputing comprises tripping relay contact, the contact of tripping relay separately of Tiao San road bus connection switch, bus protection actuating signal contact, failure protection actuating signal contact, protective device alarm contact, the protective device block signal contact of Tiao Yi road work incoming power switch;
Described bus protection and failure protection action basic logic are: this section of bus is respectively when work incoming power, mother 1,2,3 switch power supply power supply, power supply overcurrent action during bus troubles inside the sample space and outlet be without overcurrent locking, bus protection short time delay action tripping power supply; Power supply overcurrent action during bus external area error and the locking of outlet overcurrent, bus protection is failure to actuate, if during now outlet switch, protection tripping, the malfunctioning action long delay of bus tripping power supply.
As of the present invention, further illustrate, when work incoming power is during as power supply, bus protection and failure protection action basic logic are:
In bus generating region during busbar short-circuit fault, work service entrance switch phase current high-set setting element and the action of composite voltage element, the low definite value element of Er San road bus connection switch phase current, outlet 1 to N switch protection output instantaneous overcurrent contact are all failure to actuate, meet bus protection action logic, short time delay jumping work incoming power switch, locking backup auto-activating device, sends bus protection actuating signal, lights tripping operation lamp and alarm lamp;
Mother 1 switch or mother 2 switches or mother 3 switches or while going out specific electric load short trouble outside bus generating region, the high and low definite value element action of work service entrance switch phase current, and the low definite value element action of mother 1 switch or mother 2 switches or mother 3 switches or outlet phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to mother 1 switch or mother 2 switches or mother 3 switches go out specific electric load or protection tripping; cannot excise outlet fault for a long time; mother 1 switch or mother 2 switches or mother 3 switches or go out the action of the low definite value element of specific electric load phase current and do not return in setting-up time; meet failure protection action logic; failure protection action; long delay jumping work incoming power switch, locking backup auto-activating device, sends bus protection actuating signal, lights tripping operation lamp and alarm lamp.
As of the present invention, further illustrate, when mother 1 switch power supply is during as power supply, bus protection and failure protection action basic logic are:
In bus generating region during busbar short-circuit fault, mother 1 switch phase current high-set setting element and the action of composite voltage element, and work inlet wire, mother 2, the low definite value element of mother 3 switch phase current, outlet 1 to N switch protection output instantaneous overcurrent contact are all failure to actuate, meet bus protection action logic, short time delay is jumped mother 1 switch, locking backup auto-activating device, sends bus protection actuating signal, lights tripping operation lamp and alarm lamp;
Outside bus generating region, work service entrance switch or mother 2 switches or mother 3 switches or while going out specific electric load short trouble, the high and low definite value element action of mother 1 switch phase current, and the low definite value element action of work service entrance switch or mother 2 switches or mother 3 switches or outlet phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to work service entrance switch or mother 2 switches or mother 3 switches go out specific electric load or protection tripping; cannot excise outlet fault for a long time; work service entrance switch or mother 2 switches or mother 3 switches or go out the action of the low definite value element of specific electric load phase current and do not return in setting-up time; meet failure protection action logic; failure protection action; long delay is jumped mother 1 switch, and locking backup auto-activating device sends bus protection actuating signal, lights tripping operation lamp and alarm lamp.
As of the present invention, further illustrate, when mother 2 switch power supplies are during as power supply, bus protection and failure protection action basic logic are:
In bus generating region during busbar short-circuit fault, mother 2 switch phase current high-set setting elements and the action of composite voltage element, and work inlet wire, mother 1, the low definite value element of mother 3 switch phase current, outlet 1 to N switch protection output instantaneous overcurrent contact are all failure to actuate, meet bus protection action logic, short time delay is jumped mother 1 switch, locking backup auto-activating device, sends bus protection actuating signal, lights tripping operation lamp and alarm lamp;
Outside bus generating region, work service entrance switch or mother 1 switch or mother 3 switches or while going out specific electric load short trouble, the high and low definite value element action of mother 2 switch phase current, and the low definite value element action of work service entrance switch or mother 1 switch or mother 3 switches or outlet phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to work service entrance switch or mother 1 switch or mother 3 switches go out specific electric load or protection tripping; cannot excise outlet fault for a long time; work service entrance switch or mother 1 switch or mother 3 switches or go out the action of the low definite value element of specific electric load phase current and do not return in setting-up time; meet failure protection action logic; failure protection action; long delay is jumped mother 2 switches, and locking backup auto-activating device sends bus protection actuating signal, lights tripping operation lamp and alarm lamp.
As of the present invention, further illustrate, when mother 3 switch power supplies are during as power supply, bus protection and failure protection action basic logic are:
In bus generating region during busbar short-circuit fault, mother 3 switch phase current high-set setting elements and the action of composite voltage element, and work inlet wire, mother 1, the low definite value element of mother 2 switch phase current, outlet 1 to N switch protection output instantaneous overcurrent contact are all failure to actuate, meet bus protection action logic, short time delay is jumped mother 3 switches, locking backup auto-activating device, sends bus protection actuating signal, lights tripping operation lamp and alarm lamp;
Outside bus generating region, work service entrance switch or mother 1 switch or mother 2 switches or while going out specific electric load short trouble, the high and low definite value element action of mother 3 switch phase current, and the low definite value element action of work service entrance switch or mother 1 switch or mother 2 switches or outlet phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to work service entrance switch or mother 1 switch or mother 2 switches go out specific electric load or protection tripping; cannot excise outlet fault for a long time; work service entrance switch or mother 1 switch or mother 2 switches or go out the action of the low definite value element of specific electric load phase current and do not return in setting-up time; meet failure protection action logic; failure protection action; long delay is jumped mother 3 switches, and locking backup auto-activating device sends bus protection actuating signal, lights tripping operation lamp and alarm lamp.
Advantage of the present invention:
The present invention realizes single channel work incoming power under the primary connection mode of Liao mono-tunnel work incoming power, three tunnels and following bus connection switch or single channel bus connection switch as factory's (station) use 3kV～10kV bus protection and the failure protection method of the power plant under this section of Power supply mode and transformer station.Bus protection energy action message during bus troubles inside the sample space, can taper to 0.15 second by former excision 1 second fault time above, gives full play to the effect of main protection; Outside district, bus protection can reliable locking during short trouble, if bus failure protection can excise fault in time during district's external switch tripping, gives full play to the effect of backup protection.This protection all can correct, reliable, quick acting when internal fault external fault.The advantage such as that the method has is safe, reliability is high, highly sensitive, flexibility is large, very large on-the-spot practical application promotional value.
Embodiment
Below in conjunction with drawings and Examples, the present invention is further described, but protection scope of the present invention is not only confined to the scope that following specific embodiment is recorded.
Embodiment:
3kV～10kV bus protection and a failure protection method are to be applicable to 3kV～10kV bus protection and the failure protection method that single channel power supply under the primary connection mode of Yi road work incoming power, three tunnels and following bus connection switch or single channel bus connection switch are used as the power plant under this section of bus Power supply mode and transformer station; Wherein, the method is mainly to protect base quantity to form enclosed type overcurrent bus protection and failure protection action basic logic by detection, when bus breaks down, makes corresponding protection action, and bus is protected fast;
Described protection base quantity comprises to be opened into analog quantity, opens into switching value and the amount of outputing, wherein, open threephase current transformer secondary current, the secondary current of threephase current transformer separately of three road bus connection switches, the bus threephase potential transformer secondary voltage into analog quantity Wei Yi road work incoming power switch; Open into switching value as the instantaneous locking overcurrent of each outlet contact, bus protection function pressing plate drop into, bus failure protection function pressing plate drops into; Tripping relay contact, the contact of tripping relay separately of Tiao San road bus connection switch, bus protection actuating signal contact, failure protection actuating signal contact, protective device alarm contact, the protective device block signal contact of the amount of outputing Wei Tiao mono-tunnel work incoming power switch;
Described bus protection and failure protection action basic logic are: this section of bus is respectively when work incoming power, mother 1,2,3 switch power supply power supply, power supply overcurrent action during bus troubles inside the sample space and outlet be without overcurrent locking, bus protection short time delay action tripping power supply; Power supply overcurrent action during bus external area error and the locking of outlet overcurrent, bus protection is failure to actuate, if during now outlet switch, protection tripping, the malfunctioning action long delay of bus tripping power supply.
Bus protection and failure protection action basic logic are specially:
One, when work inlet wire is Power supply mode, bus protection and failure protection action basic logic (as shown in Figure 2):
(1) bus protection drops into, work inlet wire supply power mode bus protection drops into, mother 3 switches drop into, work inlet wire supply power mode failure protection drops into, and the hard pressing plate of bus protection, the hard pressing plate of failure protection drop into.
(2) in bus generating region during busbar short-circuit fault; work inlet wire phase current or Sudden Changing Rate start; the action of work service entrance switch phase current high-set setting element; if drop into composite voltage blocking element simultaneously; the action of composite voltage element; the low definite value element of Er San road bus connection switch phase current, outlet 1 to N switch protection output instantaneous overcurrent contact are all failure to actuate; meet bus protection action logic; time delay 1T1 jumps work incoming power switch; locking backup auto-activating device, sends bus protection actuating signal, lights tripping operation lamp and alarm lamp.
(3) outside bus generating region during mother 1 switch short trouble, work inlet wire phase current or Sudden Changing Rate start, the high and low definite value element action of work service entrance switch phase current, and the low definite value element action of mother 1 switch phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to mother 1 switch or protection tripping; cannot excise outlet fault for a long time; the low definite value element action of mother 1 switch phase current is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 1T2 jumps work incoming power switch, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.
(4) outside bus generating region during mother 2 switch short trouble, work inlet wire phase current or Sudden Changing Rate start, the high and low definite value element action of work service entrance switch phase current, and the low definite value element action of mother 2 switch phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to mother 2 switches or protection tripping; cannot excise outlet fault for a long time; the low definite value element action of mother 2 switch phase current is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 1T3 jumps work incoming power switch, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.
(5) outside bus generating region during mother 3 switch short trouble, work inlet wire phase current or Sudden Changing Rate start, the high and low definite value element action of work service entrance switch phase current, and the low definite value element action of mother 3 switch phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to mother 3 switches or protection tripping; cannot excise outlet fault for a long time; the low definite value element action of mother 3 switch phase current is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 1T4 jumps work incoming power switch, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.
(6) while having an outlet short trouble at least outside bus generating region, work inlet wire phase current or Sudden Changing Rate start, the high and low definite value element action of work service entrance switch phase current, and outlet switch protection output instantaneous overcurrent contact has an action at least, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to outlet switch or protection tripping; cannot excise outlet fault for a long time; the action of outlet switch protection output instantaneous overcurrent contact is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 1T5 jumps work incoming power switch, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.
Two, when Power supply mode that mother 1 switch is this section of bus, bus protection and failure protection action basic logic (as shown in Figure 3):
(1) bus protection drops into, mother 1 switch supply power mode bus protection drops into, mother 3 switches drop into, mother 1 switch supply power mode failure protection drops into, and the hard pressing plate of bus protection, the hard pressing plate of failure protection drop into.
(2) in bus generating region during busbar short-circuit fault; mother 1 switch phase current or Sudden Changing Rate start; mother 1 switch phase current high-set setting element action; if drop into composite voltage blocking element simultaneously; the action of composite voltage element; and work service entrance switch phase current low definite value element, the low definite value element of other 2 road bus connection switch phase currents, outlet 1 to N switch protection output instantaneous overcurrent contact are all failure to actuate; meet bus protection action logic; time delay 2T1 jumps mother 1 switch; locking backup auto-activating device, sends bus protection actuating signal, lights tripping operation lamp and alarm lamp.
(3) while working service entrance switch short trouble outside bus generating region, mother 1 switch phase current or Sudden Changing Rate start, the high and low definite value element action of mother 1 switch phase current, and the low definite value element action of work service entrance switch phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to work service entrance switch switch or protection tripping; cannot excise outlet fault for a long time; the low definite value element action of work service entrance switch phase current is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 2T2 jumps mother 1 switch, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.
(4) outside bus generating region during mother 2 switch short trouble, mother 1 switch phase current or Sudden Changing Rate start, the high and low definite value element action of mother 1 switch phase current, and the low definite value element action of mother 2 switch phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to mother 2 switches or protection tripping; cannot excise outlet fault for a long time; the low definite value element action of mother 2 switch phase current is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 2T3 jumps mother 1 switch, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.
(5) outside bus generating region during mother 3 switch short trouble, mother 1 switch phase current or Sudden Changing Rate start, the high and low definite value element action of mother 1 switch phase current, and the low definite value element action of mother 3 switch phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to mother 3 switches or protection tripping; cannot excise outlet fault for a long time; the low definite value element action of mother 3 switch phase current is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 2T4 jumps mother 1 switch, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.
(6) while having an outlet short trouble at least outside bus generating region, mother 1 switch phase current or Sudden Changing Rate start, the high and low definite value element action of mother 1 switch phase current, and outlet switch protection output instantaneous overcurrent contact has an action at least, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to outlet switch or protection tripping; cannot excise outlet fault for a long time; the action of outlet switch protection output instantaneous overcurrent contact is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 2T5 jumps mother 1 switch, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.
Three, when Power supply mode that mother 2 switches are this section of bus, bus protection and failure protection action basic logic (as shown in Figure 4):
(1) bus protection drops into, mother 2 switch supply power mode bus protections drop into, mother 3 switches drop into, mother 2 switch supply power mode failure protections drop into, and the hard pressing plate of bus protection, the hard pressing plate of failure protection drop into.
(2) in bus generating region during busbar short-circuit fault; mother 2 switch phase currents or Sudden Changing Rate start; mother 2 switch phase current high-set setting element actions; if drop into composite voltage blocking element simultaneously; the action of composite voltage element; and work service entrance switch phase current low definite value element, the low definite value element of other 2 road bus connection switch phase currents, outlet 1 to N switch protection output instantaneous overcurrent contact are all failure to actuate; meet bus protection action logic; time delay 3T1 jumps mother 2 switches; locking backup auto-activating device, sends bus protection actuating signal, lights tripping operation lamp and alarm lamp.
(3) outside bus generating region during mother 1 switch short trouble, mother 2 switch phase currents or Sudden Changing Rate start, the high and low definite value element action of mother 2 switch phase current, and the low definite value element action of mother 1 switch phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to mother 1 switch or protection tripping; cannot excise outlet fault for a long time; the low definite value element action of mother 1 switch phase current is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 3T2 jumps mother 2 switches, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.
(4) while working service entrance switch short trouble outside bus generating region, mother 2 switch phase currents or Sudden Changing Rate start, the high and low definite value element action of mother 2 switch phase current, and the low definite value element action of work service entrance switch phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to work service entrance switch switch or protection tripping; cannot excise outlet fault for a long time; the low definite value element action of work service entrance switch phase current is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 3T3 jumps mother 2 switches, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.
(5) outside bus generating region during mother 3 switch short trouble, mother 2 switch phase currents or Sudden Changing Rate start, the high and low definite value element action of mother 2 switch phase current, and the low definite value element action of mother 3 switch phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to mother 3 switches or protection tripping; cannot excise outlet fault for a long time; the low definite value element action of mother 3 switch phase current is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 3T4 jumps mother 2 switches, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.
(6) while having an outlet short trouble at least outside bus generating region, mother 2 switch phase currents or Sudden Changing Rate start, the high and low definite value element action of mother 2 switch phase current, and outlet switch protection output instantaneous overcurrent contact has an action at least, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to outlet switch or protection tripping; cannot excise outlet fault for a long time; the action of outlet switch protection output instantaneous overcurrent contact is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 3T5 jumps mother 2 switches, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.
Four, when Power supply mode that mother 3 switches are this section of bus, bus protection and failure protection action basic logic (as shown in Figure 5):
(1) bus protection drops into, mother 3 switch supply power mode bus protections drop into, mother 3 switches drop into, mother 3 switch supply power mode failure protections drop into, and the hard pressing plate of bus protection, the hard pressing plate of failure protection drop into.
(2) in bus generating region during busbar short-circuit fault; mother 3 switch phase currents or Sudden Changing Rate start; mother 3 switch phase current high-set setting element actions; if drop into composite voltage blocking element simultaneously; the action of composite voltage element; and work service entrance switch phase current low definite value element, the low definite value element of other 2 road bus connection switch phase currents, outlet 1 to N switch protection output instantaneous overcurrent contact are all failure to actuate; meet bus protection action logic; time delay 4T1 jumps mother 3 switches; locking backup auto-activating device, sends bus protection actuating signal, lights tripping operation lamp and alarm lamp.
(3) outside bus generating region during mother 1 switch short trouble, mother 3 switch phase currents or Sudden Changing Rate start, the high and low definite value element action of mother 3 switch phase current, and the low definite value element action of mother 1 switch phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to mother 1 switch or protection tripping; cannot excise outlet fault for a long time; the low definite value element action of mother 1 switch phase current is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 4T2 jumps mother 3 switches, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.
(4) outside bus generating region during mother 2 switch short trouble, mother 3 switch phase currents or Sudden Changing Rate start, the high and low definite value element action of mother 3 switch phase current, and the low definite value element action of mother 2 switch phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to mother 2 switches or protection tripping; cannot excise outlet fault for a long time; the low definite value element action of mother 2 switch phase current is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 4T3 jumps mother 3 switches, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.
(5) while working service entrance switch short trouble outside bus generating region, mother 3 switch phase currents or Sudden Changing Rate start, the high and low definite value element action of mother 3 switch phase current, and the low definite value element action of work service entrance switch phase current, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to work service entrance switch switch or protection tripping; cannot excise outlet fault for a long time; the low definite value element action of work service entrance switch phase current is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 4T4 jumps mother 3 switches, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.
(6) while having an outlet short trouble at least outside bus generating region, mother 3 switch phase currents or Sudden Changing Rate start, the high and low definite value element action of mother 3 switch phase current, and outlet switch protection output instantaneous overcurrent contact has an action at least, do not meet bus protection action logic, locking bus protection in short-term, bus protection is failure to actuate; If now due to outlet switch or protection tripping; cannot excise outlet fault for a long time; the action of outlet switch protection output instantaneous overcurrent contact is not returned in setting-up time; meet failure protection action logic; failure protection action; time delay 4T5 jumps mother 3 switches, and locking backup auto-activating device sends failure protection actuating signal, lights tripping operation lamp and alarm lamp.