CN102842949B - System and method for selected tripping control of loop closing protection - Google Patents

System and method for selected tripping control of loop closing protection Download PDF

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Publication number
CN102842949B
CN102842949B CN201110169829.0A CN201110169829A CN102842949B CN 102842949 B CN102842949 B CN 102842949B CN 201110169829 A CN201110169829 A CN 201110169829A CN 102842949 B CN102842949 B CN 102842949B
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China
Prior art keywords
cyclization
switch
protection
choosing
jumping
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CN201110169829.0A
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CN102842949A (en
Inventor
丁镭
李伟群
马万松
孙强
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Beijing Electric Power Corp.
State Grid Corp of China SGCC
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BEIJING ELECTRIC POWER CORP
State Grid Corp of China SGCC
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Abstract

The invention discloses a system and a method for selected tripping control of loop closing protection, which is used for carrying out selected tripping control on three air switches in a dual-power supply system in a single-bus sectional wiring form after closing the loop, wherein the system comprises three sets of microcomputer protecting devices, three constant value zone switching lead wires and a selected tripping switch, wherein the three sets of microcomputer protecting devices are respectively used for protecting the three air switches, and each set of the microcomputer protecting devices is provided with an accident tripping constant value zone and a loop closing protecting constant value zone; the three constant value zone switching lead wires are respectively connected with the three sets of microcomputer protecting devices and are used for providing constant value zone switching trigger signals for the microcomputer protecting devices; the selected tripping switch is provided with three loop closing protecting selected tripping input positions; just one of the loop closing protecting selected tripping input positions is under a conductive state in each operation; each of the loop closing protecting selected tripping input positions corresponds to one of the air switches and is connected with the constant value zone switching lead wire which is connected outside the microcomputer protecting device of the air switch. With the adoption of the technical scheme, the system is low in investment, low in reformation cost and convenient in construction.

Description

Control system and method are jumped in cyclization protection choosing
Technical field
The present invention relates to a kind of cyclization protection choosing and jump control system and method.
Background technology
The 10kV of current most user's property right is with the switchgear house of microcomputer protecting device to adopt the dual power supply system of single-trunk segmental wiring form; have bus connection switch; but do not have cyclization to protect; in order to ensure power grid security; if when regulation subscriber's drop switch does not have cyclization to protect; can not carry out and road grid switching operation; this just causes many built user's switchgear houses when carrying out grid switching operation; must have a power failure first will to the load of half in short-term, then could close bus connection switch again and restore electricity.The production of this regulation to many industrial cousumers causes very large loss, because the productive power of some industrial cousumer can not be interrupted, if had a power failure the start-up time recovering again to need to grow very much.
For the user's switchgear house of going into operation that generates electricity; if want to realize cyclization defencive function; normal method needs buy and install cyclization protective device separately; as increased the current transformer quantity of bus connection switch cabinet; change second loop return wiring, removes the locked loop of service entrance switch, this mode; comparison between projects is large and need a very large improvement expenses, and many users represent and cannot accept.
In the prior art, for the user's switchgear house of going into operation that generates electricity, buy and cyclization protective device is installed separately, causing improvement cost very high, for this problem, not yet propose effective solution at present.
Summary of the invention
Main purpose of the present invention is to provide a kind of cyclization protection choosing and jumps control system and method, to solve for the user's switchgear house of going into operation that generates electricity in prior art, buys and installs cyclization protective device separately and cause the problem that improvement cost is very high.
To achieve these goals, according to an aspect of the present invention, provide a kind of cyclization protection choosing and jump control system.
Cyclization protection choosing of the present invention is jumped control system and is controlled for carrying out the jumping of the choosing after cyclization to three air switches in the dual power supply system of single-trunk segmental wiring form.
Cyclization of the present invention protection choosing is jumped control system and is comprised: three cover microcomputer protecting devices, is used for protection three air switches respectively, often overlaps microcomputer protecting device and is provided with emergency stop valve trip definite value district and cyclization protection definite value district; Article three, definite value district switched lead, overlaps microcomputer protecting device with three respectively and is connected, for providing definite value district handoff trigger signal to microcomputer protecting device; Change over switch is jumped in choosing; being provided with three cyclizations protection selects jump shot to enter position and each operation only has a cyclization protection to select jump shot to enter position to be in on-state; each cyclization protection selects jump shot to enter the corresponding air switch in position, and the definite value district switched lead external with the microcomputer protecting device of this air switch is connected.
Further, choosing jumping change over switch is also provided with cyclization protection and exits position.
Further, choosing jumping change over switch also comprises: operating grip; Rotating mechanism, is connected with operating grip, for operating grip rotate by operation select TRIP to connect cyclization protection select jump shot enter position or cyclization protection exit position.
Further, the supply power voltage of electric power system is 10kV.
According to a further aspect in the invention, provide a kind of cyclization protection choosing and jump control method.
Cyclization protection choosing of the present invention is jumped control method and is controlled for carrying out the jumping of the choosing after cyclization to three air switches in the dual power supply system of single-trunk segmental wiring form.
Cyclization protection choosing of the present invention is jumped control method and is comprised:
Steps A: change over switch is jumped in operation choosing, connects and the cyclization corresponding to the air switch of jumping protection will be selected to select jump shot to enter position;
Step B: the cyclization protection being in on-state select jump shot to enter definite value district switched lead that position connects sends definite value district handoff trigger signal to the microcomputer protecting device of the air switch that will select jumping;
Step C: the microcomputer protecting device of the air switch of jumping be selected under the triggering of definite value district handoff trigger signal to be switched to cyclization protection definite value district;
Step D: the cyclization switch closed in three air switches;
Step e: the automatic tripping of the air switch of jumping be selected.
Further, also comprise before steps A: the electric blocking loop of being removed three air switches by the mode of switch on and off.
Further, also comprise before step e: the microcomputer protecting device determination Alloy White Iron of the air switch of jumping be selected to exceed preset value.
Further, cyclization switch is the air switch being in open position in three air switches.
Further, the supply power voltage of electric power system is 10kV.
According to technical scheme of the present invention; take full advantage of the existing microcomputer protecting device of switchgear house slightly to change; just can realize whole ring-closing selective tripping function; small investment, improvement cost are low, constructability; user can be made to accomplish not have a power failure transfer load simultaneously; avoid user on the one hand due to the capacity loss caused that has a power failure in grid switching operation process, on the other hand in the reliable situation of guarantee electric network security, also can reduce the electricity sales amount loss of Utilities Electric Co..
Accompanying drawing explanation
Figure of description is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of jumping control system according to the cyclization protection choosing of the embodiment of the present invention; And
Fig. 2 is the flow chart of jumping control method according to the cyclization protection choosing of the embodiment of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Fig. 1 is the structural representation of jumping control system according to the cyclization protection choosing of the embodiment of the present invention; as shown in Figure 1; this system is mainly used in carrying out the choosing after cyclization to three air switches in the dual power supply system of single-trunk segmental wiring form and jumps control; wherein; first air switch QF1 and second air switch QF2 is as service entrance switch; 3rd air switch QF3 is bus connection switch, and the supply power voltage of this electric power system is 10kV.
As shown in Figure 1, this system mainly comprises:
First set microcomputer protecting device 11, second overlaps microcomputer protecting device 12 and the 3rd cover microcomputer protecting device 13; be used for protection first air switch QF1, second air switch QF2 and the 3rd air switch QF3 respectively; this three covers microcomputer protecting device is equipped with emergency stop valve trip definite value district and cyclization protection definite value district; under initial condition; three cover microcomputer protecting devices are all in emergency stop valve trip definite value district, the definite value arranged according to emergency stop valve trip definite value district have to jump under accident conditions there is the function of the air switch of accident.Be switched to cyclization protection definite value district when often overlapping microcomputer protecting device definite value, then the definite value arranged according to cyclization protection definite value district has the function of the air switch corresponding to ring-closing selective tripping.
Article 1, definite value district switched lead 14, is connected with first set microcomputer protecting device 11, for providing definite value district handoff trigger signal to first set microcomputer protecting device 11.
Article 2 definite value district switched lead 15, overlaps microcomputer protecting device 12 be connected with second, for providing definite value district handoff trigger signal to the second cover microcomputer protecting device 12.
Article 3 definite value district switched lead 16, overlaps microcomputer protecting device 13 be connected with the 3, for providing definite value district handoff trigger signal to the 3rd cover microcomputer protecting device 13.
Change over switch 17 is jumped in choosing; be provided with first cyclization protection select jump shot enter position a, second cyclization protection select jump shot enter position b and the 3rd cyclization protection select jump shot to enter position c; also be provided with cyclization protection and exit position d, each operation only has a cyclization protection to select jump shot to enter position to be in on-state.
Wherein, the first cyclization protection selects jump shot to enter corresponding first the air switch QF1 of position a, and the first cyclization protection is selected jump shot to enter position a to be connected with first set microcomputer protecting device 11 by Article 1 definite value district switched lead 14; Second cyclization protection selects jump shot to enter corresponding second the air switch QF2 of position b, and the second cyclization protection is selected jump shot to enter position b to overlap microcomputer protecting device 12 by Article 2 definite value district switched lead 15 and second and be connected; 3rd cyclization protection selects jump shot to enter corresponding 3rd the air switch QF3 of position c, and the 3rd cyclization protection is selected jump shot to enter position c to overlap microcomputer protecting device 13 by Article 3 definite value district switched lead 16 and the 3rd and be connected.
In the present embodiment; for convenience of operation; the rotating mechanism that choosing is jumped change over switch 17 setting operation handle, is connected with operating grip, under the cooperation of operating grip and rotating mechanism, makes to select TRIP 17 to connect any one cyclization protection and selects jump shot to enter position or cyclization protection exits position d.
Fig. 2 is the flow chart of jumping control method according to the cyclization protection choosing of the embodiment of the present invention, and as shown in Figure 2, the method mainly comprises the steps:
Step S202, first removes the electric blocking loop of first air switch QF1, second air switch QF2 and the 3rd air switch QF3 by the mode of switch on and off.
Step S204, the operating grip of change over switch 17 is jumped in operation choosing, connects and the cyclization corresponding to the air switch of jumping protection will be selected to select jump shot to enter position.
In the normal course of operation of dual power supply system; first air switch QF1 and second air switch QF2 is in closing position; 3rd air switch QF3 is in open position; if need to select jumping first air switch QF1, then need to operate choosing and jump the first cyclization protection that the operating grip of change over switch 17 connects first air switch QF1 corresponding and select jump shot to enter position a.
Step S206, the cyclization protection being in on-state select jump shot to enter definite value district switched lead that position connects sends definite value district handoff trigger signal to the microcomputer protecting device of the air switch that will select jumping.
The first cyclization protection that first air switch QF1 to choosing jumping is corresponding is selected jump shot to enter position a and is in on-state, is then attached thereto the Article 1 definite value district switched lead 14 connect and sends definite value district handoff trigger signal to first set microcomputer protecting device 11.
Step S208, select the microcomputer protecting device of the air switch of jumping under the triggering of definite value district handoff trigger signal, be switched to cyclization protection definite value district.
Owing to being in emergency stop valve trip definite value district under the initial condition of microcomputer protecting device, after receiving definite value district handoff trigger signal, cyclization protection definite value district can be switched to.Namely when first set microcomputer protecting device 11 can be switched to cyclization protection definite value district under the triggering of definite value district handoff trigger signal.
Step S210, the cyclization switch closed in three air switches.
In the normal course of operation of dual power supply system, the 3rd the air switch QF3 being in open position is cyclization switch, and close this air switch.
Step S212, the microcomputer protecting device of the air switch of jumping be selected to judge, and whether Alloy White Iron exceedes preset value.
After the cyclization switch QF3 that closes; first set microcomputer protecting device 11 is that in whole cyclization loop, definite value is minimum; the protective device of shortest time; first set microcomputer protecting device 11 can judge whether the Alloy White Iron of system exceedes preset value; if whether Alloy White Iron exceedes preset value; perform step S214, otherwise repeated execution of steps S212.
Step S214, select the automatic tripping of the air switch of jumping.
When the Alloy White Iron of system exceedes preset value, then to select first of jumping air switch QF1 can automatic tripping, system open loop be run, eliminates Alloy White Iron on the one hand, also reach the object that this switch is jumped in choosing on the other hand, the loss of supply can not be caused to user.
In the present embodiment, the automatic jump selection function of any one air switch can be completed by said method.
From above description; can find out; control system and method are jumped in cyclization protection choosing of the present invention; take full advantage of the existing microcomputer protecting device of switchgear house slightly to change; just can realize the ring-closing selective tripping function of any one air switch; small investment, improvement cost are low, constructability; user can be made to accomplish not have a power failure transfer load simultaneously; avoid user on the one hand in grid switching operation process due to the capacity loss caused that has a power failure; on the other hand in the reliable situation of guarantee electric network security, also can reduce the electricity sales amount loss of Utilities Electric Co..
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (6)

1. a control system is jumped in cyclization protection choosing, carries out the choosing after cyclization and jumps control, it is characterized in that, comprising for the air switch of three in the dual power supply system to single-trunk segmental wiring form:
Three cover microcomputer protecting devices, are used for protecting described three air switches respectively, often overlap described microcomputer protecting device and are provided with emergency stop valve trip definite value district and cyclization protection definite value district;
Article three, definite value district switched lead, overlaps microcomputer protecting device with described three respectively and is connected, for providing definite value district handoff trigger signal respectively to the described microcomputer protecting device of correspondence;
Change over switch is jumped in choosing; being provided with three cyclizations protection selects jump shot to enter position and each operation only has a cyclization protection to select jump shot to enter position to be in on-state; each described cyclization protection selects jump shot to enter the corresponding air switch in position; and the external described definite value district switched lead of the described microcomputer protecting device corresponding with this air switch is connected; described choosing jumping change over switch is also provided with cyclization protection and exits position
Wherein, described choosing jumping change over switch also comprises:
Operating grip;
Rotating mechanism, is connected with described operating grip, and the described cyclization protection will connected for jumping change over switch in the described choosing that rotates by operation of described operating grip selects jump shot to enter position or position is exited in described cyclization protection.
2. control system is jumped in cyclization protection choosing according to claim 1, and it is characterized in that, the supply power voltage of described dual power supply system is 10kV.
3. a control method is jumped in cyclization protection choosing, carries out the choosing after cyclization and jumps control, it is characterized in that, comprising for the air switch of three in the dual power supply system to single-trunk segmental wiring form:
Steps A: change over switch is jumped in operation choosing, connect and the cyclization corresponding to the air switch of jumping protection will be selected to select jump shot to enter position, wherein, described choosing is jumped change over switch and is also comprised: operating grip, and rotating mechanism, be connected with described operating grip, the described cyclization protection will connected for jumping change over switch in the described choosing that rotates by operation of described operating grip selects jump shot to enter position or position is exited in cyclization protection;
Step B: the cyclization protection being in on-state select jump shot to enter definite value district switched lead that position connects sends definite value district handoff trigger signal to the microcomputer protecting device of the described air switch that will select jumping;
Step C: the microcomputer protecting device of the described air switch of jumping be selected under the triggering of described definite value district handoff trigger signal to be switched to cyclization protection definite value district;
Step D: the cyclization switch closed in described three air switches;
Step e: the automatic tripping of described air switch that jumping be selected,
Wherein, before described step e, and after step D; also comprise: the microcomputer protecting device of the described air switch of jumping be selected to judge whether Alloy White Iron exceedes preset value; wherein, if exceed described preset value, then to select the automatic tripping of described air switch of jumping.
4. method according to claim 3, is characterized in that, also comprises before described steps A: the electric blocking loop of being removed described three air switches by the mode of switch on and off.
5. method according to claim 3, is characterized in that, described cyclization switch is the described air switch being in open position in described three air switches.
6. the method according to any one of claim 3 to 5, is characterized in that, the supply power voltage of described dual power supply system is 10kV.
CN201110169829.0A 2011-06-22 2011-06-22 System and method for selected tripping control of loop closing protection Active CN102842949B (en)

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Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
CN104682544A (en) * 2013-11-29 2015-06-03 国家电网公司 Spare power automatic switching method and device
CN104682551B (en) * 2015-03-18 2017-01-11 常熟开关制造有限公司(原常熟开关厂) Closed-loop screening method for power parallel conversion device and power parallel conversion device
CN106129972B (en) * 2016-06-28 2019-08-06 南宁华供电力科技有限公司 It is a kind of can two-parameter switchover operation protective relaying device
CN107834545A (en) * 2017-11-13 2018-03-23 国网四川省电力公司成都供电公司 A kind of city 110kV power network cyclization methods based on transfer load method

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