CN202978243U - Line transformer protection device with tripping and closing current measuring function - Google Patents
Line transformer protection device with tripping and closing current measuring function Download PDFInfo
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- CN202978243U CN202978243U CN 201220665868 CN201220665868U CN202978243U CN 202978243 U CN202978243 U CN 202978243U CN 201220665868 CN201220665868 CN 201220665868 CN 201220665868 U CN201220665868 U CN 201220665868U CN 202978243 U CN202978243 U CN 202978243U
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- 238000005259 measurement Methods 0.000 claims description 27
- 230000001681 protective effect Effects 0.000 claims description 24
- 238000004891 communication Methods 0.000 claims description 4
- 230000005622 photoelectricity Effects 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 6
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000001514 detection method Methods 0.000 abstract 3
- 238000005070 sampling Methods 0.000 description 4
- 230000011664 signaling Effects 0.000 description 4
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- 238000010586 diagram Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
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- 230000032683 aging Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
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Abstract
The utility model discloses a line transformer protection device with a tripping and closing current measuring function, which comprises a current measuring detection unit, a switching value acquisition module, a relay, temperature measurement loops, a single-chip microcomputer, a main control unit, an open module, a circuit breaker and a front panel, wherein the current measuring detection unit is used for acquiring tripping and closing current; the switching value acquisition module is used for acquiring the position of the circuit breaker and non-electric signals of a transformer; the temperature measurement loops are connected with a temperature sensor; the current measuring detection unit, the switching value acquisition module and the temperature measurement loops are connected with the single-chip microcomputer; the single-chip microcomputer is connected with the main control unit, and the main control unit controls the relay; and the main control unit controls the circuit breaker through the open circuit, and the front panel is connected with the main control unit. The device integrates the tripping and closing current measuring and monitoring functions of an onboard operating loop, so that the device both keeps the parallel resistance of the relay so as to provide reference, and can reflect the resistance state of a switch tripping and closing coil so as to provide the basis for switch maintenance. The two paths of temperature measurement loops are applicable to various sensor accesses and can respectively satisfy the protection requirements of a wire incoming cabinet and a transformer wire outgoing cabinet.
Description
Technical field
The utility model relates to field of relay protection in power, is specifically related to a kind of line transformer protective device with the breaker tripping and closing current measurement.
Background technology
Electric power system is in operation, and various faults and irregular operating state may occur, and protective relaying device can react fault or the irregular operating state of electric component in electric power system, and moves in circuit breaker trip or send signal.
Present domestic switch tripping coil is all current mode, and it is different and different that the operating current of switch is looked the resistance of switch coil itself, and this just requires the maintenance loop of operation circuit and this operating current to be complementary.
In addition, due to the seal of switch cabinet body, make the equipment such as conductive bus bar joint in cabinet, circuit breaker dynamic/static contact, isolating switch, cable terminal wiring pile have the characteristics such as exposed high pressure, position sealing, narrow space. the thermometric of can't manually patrolling under electriferous state. in therefore can't in time finding During Process of Long-term Operation the normal electrical connector surface oxidation burn into fastening bolt that occurs become flexible, contact and the problem such as the bus bar junction is aging.Therefore, inside switch cabinet being carried out thermometric is necessary to operation maintenance.
Microcomputer Protection is widely applied in China, has become the main pattern of protective relaying device.Different protected objects; its electric parameters can be different; the protected mode of formulating according to electric parameters is also just different; therefore, Microcomputer Protection is generally route protection, tranformer protection, motor protection, capacitor protection, generator protection and bus protection etc. according to the object classification of its protection.The diversity of protective device kind makes protective device properer, comprehensive to the protection of various device; but also increased the difficulty of operation maintenance; in the application scenario of some 10kV low-pressure systems; when equipment requires in better simply situation defencive function; each protective device has almost had versatility, and the advantage that the diversity of device has can not get embodying on the contrary.In practice process, in several typical cases of 10kV system used, incoming line cabinet and transformer outgoing line cabinet all required to install overcurrent delay, quick-break time-delay and zero sequence delay protection function, and in addition, outgoing line cabinet also requires to install transformer temperature or protection.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model proposes a kind of line transformer protective device with the breaker tripping and closing current measurement.This protective device is furnished with two-way temperature measurement signal interface, can be applicable to the access of polytype transducer, can provide reference for the parallel resistance value of latching relay, can reflect again the resistance state of switch tripping coil, for switch maintenance provides foundation.
To achieve these goals, the technical solution of the utility model is:
A kind of line transformer protective device with the breaker tripping and closing current measurement comprises current measurement detecting unit, switching value acquisition module, relay, thermometric loop, single-chip microcomputer, main control unit, leaves module, circuit breaker and front panel,
The electric current of described current measurement detecting unit acquisition operations loop breaker tripping and closing, the current measurement detecting unit is connected with single-chip microcomputer by motherboard bus; Described switching value acquisition module gathers position and the transformer non-electricity signal of circuit breaker, and switching value acquisition module is isolated with single-chip microcomputer by photoelectricity and is connected; Described thermometric loop is connected with temperature sensor, and the thermometric loop is connected with single-chip microcomputer; The signal output part of described single-chip microcomputer is connected with the signal input part of main control unit, the main control unit control relay; Described main control unit is by leaving the module controls circuit breaker, and described front panel is connected with main control unit.
Described current measurement detecting unit is isolated form Hall direct current instrument transformer.
Described thermometric loop comprises two-way.
Described protective device also comprises main website, and front panel is by Ethernet, GPRS or serial ports and master station communication.
Described protective device comprises that also 10kV route protection or 10kV distribution become protection.
The utility model set plate carry operation circuit breaker tripping and closing current measurement and monitoring function, on the one hand the parallel resistance value for latching relay provides reference, can reflect on the other hand the resistance state of switch tripping coil, for switch maintenance provides foundation.This protective device is furnished with two-way temperature measurement signal interface, can be applicable to the protection requirement that polytype transducer accessed and can satisfy respectively incoming line cabinet and transformer outgoing line cabinet.
Description of drawings
Fig. 1 is logical construction schematic diagram of the present utility model;
Fig. 2 is integrated closing loop current measurement function for monitoring schematic diagram in plate of the present utility model;
Fig. 3 is that thermometric of the present utility model is controlled function realization figure.
Embodiment
A kind of line transformer protective device with the breaker tripping and closing current measurement function of the present utility model, its operation principle is: the electric current of isolated form Hall direct current instrument transformer acquisition operations circuit breaker 8 breaker tripping and closing, and by switching value acquisition module 2 samplings, obtain the synchronous closing loop current value of these circuit breaker 8 breaker tripping and closing operations, form recorder data, and calculate the historical maximum of each time breaker tripping and closing electric current, for overhaul of the equipments provides foundation;
Switch main body casing in two channel Temperature Measuring loops in access operation loop, every channel Temperature Measuring loop, the digital temperature signal that the transmission temperature sensor imports into is to single-chip microcomputer 6, then transfer to the operation that is used for looking circuit breaker 8 of main control unit 6, and according to this temperature signal send corresponding control command control relay 3 deciliter, main control unit 6 is caught the temperature signal that obtains and is reached main website 10 by the 10/100M Ethernet;
Protective device also is furnished with front panel 9; front panel 9 tape operation systems; the data of Real-time Obtaining and 6 operations of renewal main control unit; comprise current measurement value, breaker tripping and closing electric current etc.; and energy down distributing configuration data; as the rated value of instrument transformer, the definite value of each defencive function etc., also can set the type of communication protocol, by Ethernet, GPRS or serial ports and master station communication.
The utility model provides a kind of line transformer protective device with the breaker tripping and closing current measurement, further illustrates the technical solution of the utility model below in conjunction with drawings and Examples.
As shown in Figure 1; an embodiment of the present utility model provides a kind of line transformer protective device with the breaker tripping and closing current measurement; comprise current measurement detecting unit 1, switching value acquisition module 2, relay 3, thermometric loop 4, single-chip microcomputer 5, main control unit 6, leave module 7, circuit breaker 8 and front panel 9
The breaker tripping and closing electric current of described current measurement detecting unit 1 acquisition operations circuit breaker 8, current measurement detecting unit 1 is connected with single-chip microcomputer 5 by motherboard bus; Described switching value acquisition module 2 gathers position and the transformer non-electricity signal of circuit breaker 8, and switching value acquisition module 2 is isolated with single-chip microcomputer 5 by photoelectricity and is connected; Described thermometric loop 4 is connected with temperature sensor, and thermometric loop 4 is connected with single-chip microcomputer 5; The signal output part of described single-chip microcomputer 5 is connected with the signal input part of main control unit 6, main control unit 6 control relays 3; Described main control unit 6 is controlled circuit breaker 8 by leaving module 7, and described front panel 9 is connected with main control unit 6.In the present embodiment, the current measurement detecting unit is isolated form Hall direct current instrument transformer,
The positive power source terminal access isolated form Hall direct current instrument transformer of operation circuit, be converted to the direct voltage of certain amplitude range through direct current, be connected to single-chip microcomputer 5 plug-in units by motherboard bus, AD sampling A/D chip through access main control unit 6 after one-level filtering modulate circuit, gather the breaker tripping and closing electric current of circuit breaker 8, principle such as Fig. 2;
As shown in Figure 3, two channel Temperature Measuring loops 4 are connected with external temperature sensor, the digital signal that the transmission temperature sensor gathers, access the outside terminal (No. 14-16) of single-chip microcomputer 5 plug-in units by a line interface of uniqueness, through the I/O mouth of access main control unit 6 after optical coupling isolation circuit, multipotency access 64 road temperature signals of every road one line interface.Establish definite value and the time of each road temperature signal in protective device, after collecting this road temperature signal, with the definite value comparison of leaveing, after surpassing set point, control signal is sent in time-delay, controls by relay 3 outputs.
Access Ua, Ub, Uc three road phase voltage signals, one the tunnel extracts voltage U x is used for the route protection calibrating same period (when becoming protection as distribution, do not access), three-phase protective electric current I a, Ib, Ic, zero-sequence current I0 and two-phase are measured electric current I am, Icm, above 10 tunnel analog quantitys are connected to the single-chip microcomputer plug-in unit by motherboard bus, carry out two batches of samplings through 16 8 passage AD sampling A/D chip of access behind the prepositive low frequency filter loop;
The outside terminal (No. 01-10) into direct access single-chip microcomputer 5 plug-in units is opened in 10 road 220V forceful electric power direct current remote signalling, and the outside input in each road is the I/O mouth of access main control unit 6 after the photoelectricity isolation all.When as route protection; have six tunnel remote signalling be standby open into; when becoming protection as distribution; in this six tunnel remote signalling five tunnel be used separately as heavy gas tripping operation open into, light gas alarm open into, overtemperature tripping operation open into, high temperature alarm open into and standby non-electric charge quantity signalling open into, realize gas or the oil temperature protection of transformer.
Claims (5)
1. line transformer protective device with the breaker tripping and closing current measurement; it is characterized in that comprising current measurement detecting unit (1), switching value acquisition module (2), relay (3), thermometric loop (4), single-chip microcomputer (5), main control unit (6), leave module (7), circuit breaker (8) and front panel (9)
The breaker tripping and closing electric current of described current measurement detecting unit (1) acquisition operations circuit breaker (8), current measurement detecting unit (1) is connected with single-chip microcomputer (5) by motherboard bus; Described switching value acquisition module (2) gathers position and the transformer non-electricity signal of circuit breaker (8), and switching value acquisition module (2) is isolated with single-chip microcomputer (5) by photoelectricity and is connected; Described thermometric loop (4) is connected with temperature sensor, and thermometric loop (4) is connected with single-chip microcomputer (5); The signal output part of described single-chip microcomputer (5) is connected with the signal input part of main control unit (6), main control unit (6) control relay (3); Described main control unit (6) is controlled circuit breaker (8) by leaving module (7), and described front panel (9) is connected with main control unit (6).
2. according to claim 1 with the line transformer protective device of breaker tripping and closing current measurement, it is characterized in that described current measurement detecting unit (1) is isolated form Hall direct current instrument transformer.
3. according to claim 1 with the line transformer protective device of breaker tripping and closing current measurement, it is characterized in that described thermometric loop (4) comprises two-way.
4. the line transformer protective device of according to claim 1 to 3 described any one band breaker tripping and closing current measurement, characterized by further comprising main website (10), and described front panel is by Ethernet, GPRS or serial ports and master station communication.
5. according to claim 4 with the line transformer protective device of breaker tripping and closing current measurement, characterized by further comprising 10kV route protection or 10kV distribution and become protection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220665868 CN202978243U (en) | 2012-12-06 | 2012-12-06 | Line transformer protection device with tripping and closing current measuring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220665868 CN202978243U (en) | 2012-12-06 | 2012-12-06 | Line transformer protection device with tripping and closing current measuring function |
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| Publication Number | Publication Date |
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| CN202978243U true CN202978243U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220665868 Expired - Fee Related CN202978243U (en) | 2012-12-06 | 2012-12-06 | Line transformer protection device with tripping and closing current measuring function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946092A (en) * | 2012-12-06 | 2013-02-27 | 广州南方电力集团科技发展有限公司 | Line transformer protection device with tripping and closing current measuring function |
| CN105305235A (en) * | 2015-05-07 | 2016-02-03 | 国家电网公司 | Portable relay protection device for distribution network |
-
2012
- 2012-12-06 CN CN 201220665868 patent/CN202978243U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946092A (en) * | 2012-12-06 | 2013-02-27 | 广州南方电力集团科技发展有限公司 | Line transformer protection device with tripping and closing current measuring function |
| CN102946092B (en) * | 2012-12-06 | 2015-08-12 | 广州南方电力集团科技发展有限公司 | A kind of line transformer protective device with breaker tripping and closing current measurement |
| CN105305235A (en) * | 2015-05-07 | 2016-02-03 | 国家电网公司 | Portable relay protection device for distribution network |
| CN105305235B (en) * | 2015-05-07 | 2017-05-03 | 国家电网公司 | portable relay protection device for distribution network |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20171124 Address after: 510245 Honoka South Street, Guangzhou Avenue, Guangzhou, Guangdong Province, No. 1 Co-patentee after: Guangzhou Power Supply Bureau Patentee after: Nanfang Electric Power Group Sci. & Tech. Dev. Co., Ltd., Guangzhou Address before: 510245 Honoka South Street, Guangzhou Avenue, Guangzhou, Guangdong Province, No. 1 Patentee before: Nanfang Electric Power Group Sci. & Tech. Dev. Co., Ltd., Guangzhou |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190613 Address after: 510245 No. 1 Huanan Street, Zhongsui, Jiangnan Avenue, Haizhu District, Guangzhou City, Guangdong Province Patentee after: Nanfang Electric Power Group Sci. & Tech. Dev. Co., Ltd., Guangzhou Address before: 510245 No. 1 Huanan Street, Zhongsui, Jiangnan Avenue, Guangzhou City, Guangdong Province Co-patentee before: Guangzhou Power Supply Bureau Patentee before: Nanfang Electric Power Group Sci. & Tech. Dev. Co., Ltd., Guangzhou |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20201206 |