CN202772882U - Shielding-type anti-interference electric power secondary system - Google Patents

Shielding-type anti-interference electric power secondary system Download PDF

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Publication number
CN202772882U
CN202772882U CN 201220141859 CN201220141859U CN202772882U CN 202772882 U CN202772882 U CN 202772882U CN 201220141859 CN201220141859 CN 201220141859 CN 201220141859 U CN201220141859 U CN 201220141859U CN 202772882 U CN202772882 U CN 202772882U
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CN
China
Prior art keywords
described
electric power
secondary system
cable
heart yearn
Prior art date
Application number
CN 201220141859
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Chinese (zh)
Inventor
李军
江朝兵
董强
向兴林
许卫
张�雄
Original Assignee
四川省送变电建设有限责任公司
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Priority to CN 201220141859 priority Critical patent/CN202772882U/en
Application granted granted Critical
Publication of CN202772882U publication Critical patent/CN202772882U/en

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Abstract

The utility model relates to anti-interference technology of a power system and specifically discloses a shielding-type anti-interference electric power secondary system. The shielding-type anti-interference electric power secondary system includes a secondary device with a load. The secondary device is connected with a primary device with a power source through a connection cable. At least one core wire is arranged in an external protection layer of the connection cable. An internal protection layer is wrapped in the core wire. A cable shielding layer is arranged inside the external protection layer. A core wire shielding layer is arranged inside the internal protection layer. According to the utility model, both of the core wire of the cable and the cable are equipped with the shielding layers, so that interference among core wires and external interference can be prohibited. Therefore, the improvement of the accuracy of data transmission can be facilitated.

Description

The jamproof electric power secondary system of a kind of protected type

Technical field

The utility model relates to the electric power system Anti-Jamming Technique, relates in particular to the jamproof electric power secondary system of a kind of protected type.

Background technology

Electric power secondary system is comprised of secondary cable and secondary device etc., and wherein the kind of secondary device and model are a lot, and residing running environment complex easily is subjected to external interference.The main cause that this interference forms has following several: (1) lightning current injects the interference that ground network causes; (2) the power frequency short circuit current injects the interference that ground network causes; (3) once, secondary device operates the interference that causes; (4) under the strong electric field environment, because the interference that electromagnetic field effect causes.These interference may exert an influence to the normal operation of electric power secondary system, and are light then affect the stable operation of electric power secondary system and equipment, heavy then cause protecting misoperation and cause power failure, when serious even can lead to larger accident.

In the prior art, usually adopt shielding measure to improve the antijamming capability of electric power secondary system.The essence of shielding is to isolate and the electromagnetic interference that decays by the totally-enclosed housing that the metal with satisfactory electrical conductivity consists of, and such as the Microcomputer Protection housing devices such as core digital unit, A/D converter is contained in the inner shield housing.Common shielding mode has the electric field shielding (as isolating between voltage, the power pack first and second side winding) that suppresses the parasitic capacitance coupled interference and prevents electromagnetic coupled and inductive coupled magnetic field shielding etc.

In fact, electric power secondary system equipment is to electromagnetic interference sensitivity very, electromagnetic interference has a great impact local test data, thereby usually these secondary devices have been taked comparatively tight interference protection measure, but then do not cause enough attention for the interference that the connection cable between connecting secondary equipment and the primary equipment produces.In the present electric power secondary system, all take the ordinary power line cable to connect between the primary equipment of load-carrying secondary device and charged, this electric power cable is not taked shielding construction, in use can not shield interference between self core and the electromagnetic interference between cable and the external world, may have influence on thus the correctness of transfer of data.

The utility model content

In view of this, the utility model purpose is to provide a kind of protected type jamproof electric power secondary system, the interference that can the establishment connection cable produces.

For solving above technical problem; the technical scheme that the utility model provides is: the jamproof electric power secondary system of a kind of protected type; comprise load-carrying secondary device; described secondary device is connected with the primary equipment of charged by connection cable; be provided with at least one heart yearn in the external protection of described connection cable; described heart yearn is enclosed with inner protective layer, and the inboard of described external protection is provided with the cable shielding layer, and the inboard of described inner protective layer is provided with the heart yearn screen.

More preferably, described heart yearn is many.

More preferably, the two ends of described cable shielding layer and/or described heart yearn screen difference ground connection.

More preferably, described cable shielding layer and/or described heart yearn screen pass through ground protection element ground connection by an end of primary equipment, and described cable shielding layer and/or described heart yearn screen are by the direct ground connection of an end of secondary device.

More preferably, the length of described stube cable is greater than 30m.

More preferably, described ground protection element is connected to apart from the position of transformer substation switch field primary equipment 6m~8m.

More preferably, described protection component is earth resistance.

More preferably, described earth resistance is Zinc-oxide piezoresistor.

Compared with prior art, the heart yearn of the connection cable in the jamproof electric power secondary system of the utility model protected type has all designed the heart yearn screen, is conducive to the electromagnetic radiation, electrostatic coupling and the electromagnetic induction that suppress to produce between the heart yearn; Simultaneously also design the cable shielding layer, be conducive to the electromagnetic interference that suppresses outside; This two aspects factor has been eliminated the interference that the electric power secondary system connection cable produces preferably, is conducive to guarantee the accuracy of data.

Description of drawings

Fig. 1 is the circuit diagram of the jamproof electric power secondary system of the utility model protected type;

Fig. 2 is the cross sectional representation of connection cable among Fig. 1.

Embodiment

The core concept of the jamproof electric power secondary system of the utility model protected type is that self all arranges screen the heart yearn of connection cable and cable, in order to suppress interference and extraneous interference between the heart yearn.

In order to make those skilled in the art understand better the technical solution of the utility model, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.

Simultaneously referring to Fig. 1, Fig. 2, wherein: Fig. 1 represents the preferred embodiment of the jamproof electric power secondary system of the utility model protected type (hereinafter to be referred as electric power secondary system); The concrete structure of connection cable in Fig. 2 presentation graphs 1.This electric power secondary system comprises load-carrying secondary device 1, and it is connected with the primary equipment 3 of charged by connection cable 2, is provided with many heart yearns 25 in the external protection 21 of this connection cable 2, and wherein every heart yearn is enclosed with inner protective layer 23; Especially, 21 layers are provided with cable shielding layer 22 in the external protection, and the inboard of inner protective layer 23 is provided with heart yearn screen 24.

In the present embodiment, self all arranges screen the heart yearn of connection cable and cable, can suppress interference and extraneous interference between the heart yearn, particularly: the heart yearn of connection cable has all designed the heart yearn screen, is conducive to the electromagnetic radiation, electrostatic coupling and the electromagnetic induction that suppress to produce between the heart yearn; Cable self arranges the cable shielding layer, is conducive to the electromagnetic interference that suppresses outside; This two aspects factor has been eliminated the interference that the electric power secondary system connection cable produces preferably, is conducive to guarantee the accuracy of data.

The utility model also with each screen two-terminal-grounding of connection cable 2, with further reduction interference source, below is described.

As shown in Figure 1, in the jamproof electric power secondary system of protected type of the present utility model, the two ends of cable shielding layer 22 and heart yearn screen 24 are ground connection respectively, in order to effectively reduce interference source.More preferably, be make cable shielding layer 22 and heart yearn screen 24 by an end of primary equipment 3 by ground protection element 4 ground connection, cable shielding layer 22 and or heart yearn screen 24 by the direct ground connection of an end of secondary device 1.

In practical power systems, therefore the length of stube cable 2 can make ground protection element 4 be connected to apart from the position of transformer substation switch field primary equipment 6m~8m generally greater than 30m.Preferably, ground protection element 4 is earth resistance, and particular type can be Zinc-oxide piezoresistor etc.The resistance R of this earth resistance equates with the cable shield 22 equivalent resistance Rs of stube cable 2, also can choose separately according to actual conditions.

Like this, this embodiment is by optimizing the grounding scheme of connection cable, is conducive to earth current or disturbs current limliting, avoided thus earth-current or disturbed the danger of burning screen when excessive, simultaneously also can reach preferably electromagnetic compatibility effect, and can not cause negative antenna effect.

Only be preferred implementation of the present utility model below, should be pointed out that above-mentioned preferred implementation should not be considered as restriction of the present utility model, protection range of the present utility model should be as the criterion with the claim limited range.For those skilled in the art, within not breaking away from spirit and scope of the present utility model, can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.

Claims (8)

1. jamproof electric power secondary system of protected type; comprise load-carrying secondary device; described secondary device is connected with the primary equipment of charged by connection cable; be provided with at least one heart yearn in the external protection of described connection cable; described heart yearn is enclosed with inner protective layer; it is characterized in that, the inboard of described external protection is provided with the cable shielding layer, and the inboard of described inner protective layer is provided with the heart yearn screen.
2. the jamproof electric power secondary system of protected type as claimed in claim 1 is characterized in that, described heart yearn is many.
3. the jamproof electric power secondary system of protected type as claimed in claim 1 or 2 is characterized in that, the two ends of described cable shielding layer and/or described heart yearn screen are ground connection respectively.
4. the jamproof electric power secondary system of protected type as claimed in claim 3; it is characterized in that; described cable shielding layer and/or described heart yearn screen pass through ground protection element ground connection by an end of primary equipment, and described cable shielding layer and/or described heart yearn screen are by the direct ground connection of an end of secondary device.
5. the jamproof electric power secondary system of protected type as claimed in claim 1 is characterized in that, the length of described connection cable is greater than 30m.
6. the jamproof electric power secondary system of protected type as claimed in claim 5 is characterized in that, described ground protection element is connected to apart from the position of transformer substation switch field primary equipment 6m ~ 8m.
7. the jamproof electric power secondary system of protected type as claimed in claim 4 is characterized in that, described protection component is earth resistance.
8. the jamproof electric power secondary system of protected type as claimed in claim 7 is characterized in that, described earth resistance is Zinc-oxide piezoresistor.
CN 201220141859 2012-04-06 2012-04-06 Shielding-type anti-interference electric power secondary system CN202772882U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220141859 CN202772882U (en) 2012-04-06 2012-04-06 Shielding-type anti-interference electric power secondary system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220141859 CN202772882U (en) 2012-04-06 2012-04-06 Shielding-type anti-interference electric power secondary system

Publications (1)

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CN202772882U true CN202772882U (en) 2013-03-06

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CN 201220141859 CN202772882U (en) 2012-04-06 2012-04-06 Shielding-type anti-interference electric power secondary system

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CN (1) CN202772882U (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104092386A (en) * 2014-07-22 2014-10-08 诸暨市沃思环保技术有限公司 Inverter circuit of drive module of power supply system of buried sewage treatment equipment ventilator room
CN104104049A (en) * 2014-07-22 2014-10-15 诸暨市沃思环保技术有限公司 Lightning protection circuit of a buried sewage treatment equipment fan room
CN104104239A (en) * 2014-07-22 2014-10-15 诸暨市沃思环保技术有限公司 Power supply system of buried sewage treatment equipment fan room
CN104100556A (en) * 2014-07-22 2014-10-15 诸暨市沃思环保技术有限公司 Buried sewage treatment equipment
CN104104073A (en) * 2014-07-22 2014-10-15 诸暨市沃思环保技术有限公司 Buried sewage treatment equipment fan room
CN104104238A (en) * 2014-07-22 2014-10-15 诸暨市沃思环保技术有限公司 Drive module of power supply system of buried sewage treatment equipment fan room
CN104104074A (en) * 2014-07-22 2014-10-15 诸暨市沃思环保技术有限公司 Connecting cable of power supply system of buried sewage treatment equipment fan room
CN104124676A (en) * 2014-07-22 2014-10-29 诸暨市沃思环保技术有限公司 Cable connection structure of power supply system of buried sewage treatment equipment
CN105140571A (en) * 2015-08-13 2015-12-09 上海航天电源技术有限责任公司 Lithium-ion battery pack system with high electromagnetic compatibility

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104092386A (en) * 2014-07-22 2014-10-08 诸暨市沃思环保技术有限公司 Inverter circuit of drive module of power supply system of buried sewage treatment equipment ventilator room
CN104104049A (en) * 2014-07-22 2014-10-15 诸暨市沃思环保技术有限公司 Lightning protection circuit of a buried sewage treatment equipment fan room
CN104104239A (en) * 2014-07-22 2014-10-15 诸暨市沃思环保技术有限公司 Power supply system of buried sewage treatment equipment fan room
CN104100556A (en) * 2014-07-22 2014-10-15 诸暨市沃思环保技术有限公司 Buried sewage treatment equipment
CN104104073A (en) * 2014-07-22 2014-10-15 诸暨市沃思环保技术有限公司 Buried sewage treatment equipment fan room
CN104104238A (en) * 2014-07-22 2014-10-15 诸暨市沃思环保技术有限公司 Drive module of power supply system of buried sewage treatment equipment fan room
CN104104074A (en) * 2014-07-22 2014-10-15 诸暨市沃思环保技术有限公司 Connecting cable of power supply system of buried sewage treatment equipment fan room
CN104124676A (en) * 2014-07-22 2014-10-29 诸暨市沃思环保技术有限公司 Cable connection structure of power supply system of buried sewage treatment equipment
CN105140571A (en) * 2015-08-13 2015-12-09 上海航天电源技术有限责任公司 Lithium-ion battery pack system with high electromagnetic compatibility
CN105140571B (en) * 2015-08-13 2017-11-28 上海航天电源技术有限责任公司 A kind of lithium ion battery pack system with high electrical-magnetic compatibility energy

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130306

Termination date: 20140406

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