CN102790381A - Tripping control device for start of switching current of distribution network 10kV switching station - Google Patents
Tripping control device for start of switching current of distribution network 10kV switching station Download PDFInfo
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- CN102790381A CN102790381A CN2012103026998A CN201210302699A CN102790381A CN 102790381 A CN102790381 A CN 102790381A CN 2012103026998 A CN2012103026998 A CN 2012103026998A CN 201210302699 A CN201210302699 A CN 201210302699A CN 102790381 A CN102790381 A CN 102790381A
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Abstract
The invention discloses a power distribution system and particularly relates to a tripping control device for start of switching current of a distribution network 10kV switching station. The tripping control device comprises a secondary current loop, a charging loop and a tripping loop, wherein the secondary current loop is formed by serially connecting current transformers, inverse time relay coils with a CT (current transformer); the charging loop is formed by serially connecting a secondary side of the CT, a rectifying element with a capacitor; and the tripping loop is formed by serially connecting the capacitor, inverse time relay normally-opened contacts with a circuit breaker tripping coil. The tripping control device for start of the switching current of the distribution network 10kV switching station has the advantages that hidden danger of maladaptation of capacity of an original system is eliminated, maintenance cost is reduced, and reliability and safety of tripping are greatly improved; and when a line fails, power restoration by a man on duty can be reliably guaranteed, power grid benefits are increased, and the tripping control device has practical use value.
Description
Technical field
The present invention relates to a kind of distribution system, relate in particular to a kind of control tripgear that distribution 10kV switching station switching current starts that is used for.
Background technology
Distribution system is complicated because branch line is many; The defencive function configuration of distribution system is simpler; Mostly the general overcurrent protection of adopting is to rely on fault current to start breaking coil through transformer induced secondary current; This mode cost of investment is lower, and cost performance is higher, and general is applied in my office's distribution network system.But the insecure problem of action has appearred in actual motion; Find through routine inspection means and routine test; The trip system loop of 10kV switching station reliable source of power points such as configuring direct current power supply, external power supply not in the distribution system; But utilizing the fault current in the switching station major loop to start trip(ping) circuit, this tripping operation control is the size of coming the monitor for faults electric current through conventional inverse time lag electromagnetic relay, according to the order of severity of failure condition; Control the length of trip time according to the inverse time lag principle, start tripping operation.The cost of this relay own is lower, in transformer substation system in the past, often uses, and belongs to first generation protection product; Because of its principle is simple, technology maturation and by widespread in network system, but compare with present microcomputer type protective device; Function is simpler; The proper rate is lower, and personnel are prone to bump or should be surrounding environment influence by mistake cause misoperation, so eliminated by existing protection gradually.As the protection of urban distribution network user terminal, be adequate a kind of protected mode.But after the 10kV switching station adopted this kind mode mostly, overstep tripping was frequent, and due effect is not played in protection.
Summary of the invention
The object of the present invention is to provide a kind of control tripgear that distribution 10kV switching station switching current starts that is used for, solved the existing unreliable and low problem of accuracy of protection system that is used for distribution system.
For addressing the above problem, the technical scheme that the present invention taked is: a kind of control tripgear that is used for the startup of distribution 10kV switching station switching current:
Comprise the secondary current loop that current transformer, inverse time relay coil and CT mutual inductor serial form;
Comprise the charge circuit of secondary, rectifier cell and the capacitors in series formation of CT instrument transformer, the secondary of wherein said CT instrument transformer is connected two incoming ends of rectifier cell, and the both positive and negative polarity of said rectifier cell is connected the two ends of capacitor;
Comprise the trip(ping) circuit that said capacitor, inverse time relay normal opened contact and the series connection of circuit breaker jumping circle form.
For making the present invention play better technique effect: technical scheme further is that above-mentioned secondary current loop has two or more, and the CT instrument transformer in each secondary current loop has same secondary.
Technical scheme further is that above-mentioned inverse time relay normal opened contact has two, and is parallel with one another in trip(ping) circuit.
Adopt the beneficial effect that technique scheme produced to be: to eliminate the unconformable hidden danger of capacity in the original system, reduced maintenance cost, improved the reliability and the fail safe of tripping operation widely; When line fault, for the person on duty restores electricity the reliability assurance is provided, improved grid benefit, have actual use value.
Description of drawings
Fig. 1 is a kind of line map that is used for an embodiment of control tripgear of distribution 10kV switching station switching current startup of the present invention.
Among the figure: 1TA, 2TA are current transformer, and 1KA, 2KA are the inverse time relay coil, and 1KA1,2KA1 are the inverse time relay normal opened contact, and TQ is that circuit breaker is jumped circle, and C is a capacitor, and CT is the CT instrument transformer.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Fig. 1 shows an a kind of embodiment who is used for the control tripgear of distribution 10kV switching station switching current startup of the present invention: a kind of control tripgear that is used for the startup of distribution 10kV switching station switching current:
Comprise the secondary current loop that current transformer, inverse time relay coil and CT mutual inductor serial form;
Comprise the charge circuit of secondary, rectifier cell and the capacitors in series formation of CT instrument transformer, the secondary of wherein said CT instrument transformer is connected two incoming ends of rectifier cell, and the both positive and negative polarity of said rectifier cell is connected the two ends of capacitor;
Comprise the trip(ping) circuit that said capacitor, inverse time relay normal opened contact and the series connection of circuit breaker jumping circle form.
A kind of another embodiment that is used for the control tripgear of distribution 10kV switching station switching current startup according to the present invention, stating the secondary current loop has two or more, and the CT instrument transformer in each secondary current loop has same secondary.Should be understood that the embodiment that only discloses two secondary current loops among Fig. 1, but be not limited to only have two secondary current loops, can dispose three, four or more secondary current loop simultaneously.
A kind of another embodiment that is used for the control tripgear of distribution 10kV switching station switching current startup according to the present invention, the inverse time relay normal opened contact has two, and is parallel with one another in trip(ping) circuit.
" embodiment " who is spoken of in this manual, " another embodiment ", " embodiment ", " preferred embodiment " etc. refer to the concrete characteristic, structure or the characteristics that combine this embodiment to describe and are included among at least one embodiment of the application's generality description.A plurality of local appearance statement of the same race is not necessarily to refer to same embodiment in specification.Further, when describing a concrete characteristic, structure or characteristics in conjunction with arbitrary embodiment, what institute will advocate is that other embodiment of combination realize that this characteristic, structure or characteristics also fall within the scope of the invention.
Although invention has been described with reference to a plurality of explanatory embodiment of the present invention here; But; Should be appreciated that those skilled in the art can design a lot of other modification and execution modes, these are revised and execution mode will drop within disclosed principle scope of the application and the spirit.More particularly, in the scope of, accompanying drawing open and claim, can carry out multiple modification and improvement to the building block and/or the layout of subject combination layout in the application.Except modification that building block and/or layout are carried out with improve, to those skilled in the art, other purposes also will be tangible.
Claims (3)
1. one kind is used for the control tripgear that distribution 10kV switching station switching current starts, and it is characterized in that:
Comprise the secondary current loop that current transformer, inverse time relay coil and CT mutual inductor serial form;
Comprise the charge circuit of secondary, rectifier cell and the capacitor formation of CT instrument transformer, the secondary of wherein said CT instrument transformer is connected two incoming ends of rectifier cell, and the both positive and negative polarity of said rectifier cell is connected the two ends of capacitor;
Comprise the trip(ping) circuit that said capacitor, inverse time relay normal opened contact and the series connection of circuit breaker jumping circle form.
2. a kind of control tripgear that distribution 10kV switching station switching current starts that is used for according to claim 1, it is characterized in that: said secondary current loop has two or more, and the CT instrument transformer in each secondary current loop has same secondary.
3. a kind of control tripgear that distribution 10kV switching station switching current starts that is used for according to claim 1, it is characterized in that: said inverse time relay normal opened contact has two, and is parallel with one another in trip(ping) circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103026998A CN102790381A (en) | 2012-08-23 | 2012-08-23 | Tripping control device for start of switching current of distribution network 10kV switching station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103026998A CN102790381A (en) | 2012-08-23 | 2012-08-23 | Tripping control device for start of switching current of distribution network 10kV switching station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102790381A true CN102790381A (en) | 2012-11-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103026998A Pending CN102790381A (en) | 2012-08-23 | 2012-08-23 | Tripping control device for start of switching current of distribution network 10kV switching station |
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| CN (1) | CN102790381A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87215041U (en) * | 1987-11-01 | 1988-09-28 | 大庆石油管理局第四采油厂 | Automatic testing and cut-out device for line short fault |
| CN201191761Y (en) * | 2008-04-24 | 2009-02-04 | 南京因泰莱配电自动化设备有限公司 | Current protection control device in 24kV vacuum circuit breaker |
| CN201868839U (en) * | 2010-12-01 | 2011-06-15 | 吴苏杭 | Over-current protection circuit |
| US20120133477A1 (en) * | 2011-06-24 | 2012-05-31 | Renewable Power Conversion, Inc. | Renewable one-time load break contactor |
| CN202817731U (en) * | 2012-08-23 | 2013-03-20 | 四川省电力公司绵阳电业局 | Tripping control device for start of switching current of distribution network 10kV switching station |
-
2012
- 2012-08-23 CN CN2012103026998A patent/CN102790381A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87215041U (en) * | 1987-11-01 | 1988-09-28 | 大庆石油管理局第四采油厂 | Automatic testing and cut-out device for line short fault |
| CN201191761Y (en) * | 2008-04-24 | 2009-02-04 | 南京因泰莱配电自动化设备有限公司 | Current protection control device in 24kV vacuum circuit breaker |
| CN201868839U (en) * | 2010-12-01 | 2011-06-15 | 吴苏杭 | Over-current protection circuit |
| US20120133477A1 (en) * | 2011-06-24 | 2012-05-31 | Renewable Power Conversion, Inc. | Renewable one-time load break contactor |
| CN202817731U (en) * | 2012-08-23 | 2013-03-20 | 四川省电力公司绵阳电业局 | Tripping control device for start of switching current of distribution network 10kV switching station |
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Application publication date: 20121121 |