CN204536469U - A kind of Substation secondary circuit voltage current transformer pick-up unit - Google Patents

A kind of Substation secondary circuit voltage current transformer pick-up unit Download PDF

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Publication number
CN204536469U
CN204536469U CN201520066203.0U CN201520066203U CN204536469U CN 204536469 U CN204536469 U CN 204536469U CN 201520066203 U CN201520066203 U CN 201520066203U CN 204536469 U CN204536469 U CN 204536469U
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China
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signal
module
circuit
electrically
voltage
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CN201520066203.0U
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Chinese (zh)
Inventor
褚国伟
陈慷
金龙
蒋琪
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江苏省电力公司常州供电公司
江苏省电力公司
国家电网公司
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Priority to CN201520066203.0U priority Critical patent/CN204536469U/en
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Publication of CN204536469U publication Critical patent/CN204536469U/en

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Abstract

The utility model provides a kind of Substation secondary circuit voltage current transformer pick-up unit, comprises excitation power supply and hand-held sense terminals; Excitation power supply comprises signal generating circuit, power amplification circuit, phase option circuit, dsp controller and the first wireless communication module; Hand-held sense terminals comprises interface module, signal amplification module, filtration module, A/D modular converter, signal processing module, the second wireless communication module, touch-screen and power module; During use, excitation power supply is by the voltage and current signal of radio communication according to handheld terminal order output detections; Hand-held sense terminals detects and breakdown judge voltage transformer (VT) summation current transformer secondary side.When the utility model uses, wiring and safety easy to use, can carry out failture evacuation easily and accurately, thus can increase substantially work efficiency and work accuracy, and low to the requirement of operator, applicability is strong.

Description

A kind of Substation secondary circuit voltage current transformer pick-up unit

Technical field

The utility model relates to Substation secondary circuit checkout equipment, is specifically related to a kind of Substation secondary circuit voltage current transformer pick-up unit.

Background technology

In transformer station; secondary current, voltage circuit are as the signal source of transforming plant protecting and TT&C system; there is provided to transforming plant protecting measuring system and measure and protection voltage and current signal; realize monitoring and defencive function Operation of Electric Systems, thus in transformer station, each electric current, voltage secondary circuit wiring correctness have a direct impact for transformer station's reliability service tool.When secondary current, voltage circuit exist wiring error or defect, as easy as rolling off a logly cause transforming plant protecting device malfunction or tripping, reduce transformer station's power supply reliability, affect electric power effective supply; And, the CT(current transformer in the middle of secondary circuit) open circuit and PT(voltage transformer (VT)) short circuit all belongs to precarious position, easily causes equipment and personal injury.Therefore, transformer station is before new website or transformation station put into operation or relate to PT, during CT secondary circuit change variation, must carefully check group electric current and voltage secondary circuit each in transformer station and test before power transmission, correct to guarantee that each electric current and voltage loop connects.Further, when the wiring of electric current and voltage secondary circuit is complete, the important electric current and voltage secondary circuit of part must pass through load test, verifies the correctness in its loop.

In general, for the inspection in CT, PT loop, at least comprise following content: whether CT exists open circuit, whether PT exists short circuit, and whether CT, PT loop polarity is correct.Current generally adopt " point-polarity method " checks mutual inductor polarity, and because in transformer station, secondary current loop group is more, utilize " point-polarity method ", during Inspection and analysis all CT loop polarities correctness, workload is heavy, and efficiency is low, and easy under-enumeration.Further, for GIS device, because CT is encapsulated in housing, adopt " point-polarity method " to carry out polarity check to CT and there is certain difficulty.Concerning PT loop, when must adopt primary side lead to platen press nuclear phase is carried out to it time, once there is certain potential safety hazard in logical pressure test, easily causes the person to get an electric shock and short circuit grounding.And, analyze because this method of testing needs manually to draw secondary voltage circuit vector plot, require that tester possesses certain professional theory knowledge and can correctly test.Practical experience for many years showed in the past, CT, PT secondary circuit as easy as rolling off a log generation wiring error phenomenon in transformer station.Once there is wiring error or circuit defect, and be not just examined out when power delivery voltage secondary nuclear phase or load test, then can only apply for having a power failure process, the timely power transmission of extreme influence converting equipment.Although the correctness of electric current and voltage secondary circuit detects and have accumulated more inspection method in engineering practice process in the past in transformer station, in current testing process, there is the series of problems such as wiring complexity, efficiency is low, operation requirements is high, security is low, false drop rate is high.

Utility model content

The purpose of this utility model is: simple to operate when providing a kind of use, can ensure operating personnel's personal safety and can improve the Substation secondary circuit voltage current transformer pick-up unit of test job efficiency.

The technical solution of the utility model is: Substation secondary circuit voltage current transformer pick-up unit of the present utility model, and its design feature is: comprise excitation power supply and hand-held sense terminals;

Above-mentioned excitation power supply comprises signal generating circuit, power amplification circuit, phase option circuit, dsp controller and the first wireless communication module;

Signal generating circuit is provided with power input, electric current and voltage output terminal and trigger pip end; Power amplification circuit and phase option circuit are respectively equipped with electric current and voltage input end, electric current and voltage output terminal and control signal input end; Dsp controller is provided with test trigger signal output terminal, electric current and voltage output control terminal, phase selection signal output part and communication ends; First wireless communication module is provided with internal communication ends and radio communication end;

The trigger pip end of signal generating circuit is electrically connected with the test trigger signal output end signal of dsp controller; The electric current and voltage input end of power amplification circuit is electrically connected with the electric current and voltage output terminal of signal generating circuit; The control signal input end of power amplification circuit is electrically connected with the electric current and voltage output control terminal signal of dsp controller; The electric current and voltage input end of phase option circuit is electrically connected with the electric current and voltage output terminal of power amplification circuit; The control signal input end of phase option circuit is electrically connected with the phase selection signal output part signal of dsp controller; The communication ends of dsp controller is electrically connected with the internal communication ends two-way signaling of the first wireless communication module;

Hand-held sense terminals comprises interface module, signal amplification module, filtration module, A/D modular converter, signal processing module, the second wireless communication module, touch-screen and power module;

Interface module is provided with input interface and signal output part; Signal amplification module, filtration module and A/D modular converter be signal input part and signal output part respectively; Signal processing module is provided with detection signal input end, the first communication ends and second communication end; The internal communication ends of second wireless communication module and radio communication end; Touch-screen is provided with signal input output end;

The signal input part of signal amplification module is electrically connected with the signal output part of interface module; The signal input part of filtration module is electrically connected with the signal output part of signal amplification module; The signal input part of A/D modular converter is electrically connected with the signal output part of filtration module; The detection signal input end of signal processing module is electrically connected with the signal output part signal of A/D modular converter; First communication ends of signal processing module is electrically connected with the internal communication ends two-way signaling of the second wireless communication module; The second communication end of signal processing module is electrically connected with the signal input output end two-way signaling of touch-screen; Power module is used for providing working power;

During use, external AC220V civil power when the power input of the signal generating circuit of excitation power supply uses; The electric current and voltage output terminal of the phase option circuit of excitation power supply is electrically connected with the voltage transformer (VT) summation current transformer primary side of Substation secondary circuit to be detected; The input interface of the interface module of hand-held sense terminals is electrically connected with the voltage transformer (VT) summation current transformer secondary side of Substation secondary circuit to be detected; The radio communication end radio communication of the radio communication end of the second wireless communication module of hand-held sense terminals and the first wireless communication module of excitation power supply.

The utility model has positive effect: (1) Substation secondary circuit voltage current transformer of the present utility model pick-up unit, when it uses, easy-to-connect safety, testing staff only needs can complete test by hand-held sense terminals, convenient to use, improve work efficiency and the personal safety of testing staff can be ensured.(2) Substation secondary circuit voltage current transformer pick-up unit of the present utility model, when it uses, there is intelligent diagnostics function, when detecting that the faults such as wiring error appear in Substation secondary circuit voltage transformer (VT) and/or current transformer, touch-screen 27 is corresponding provides fault cues, provide the prompting of fault handling operation step simultaneously, detect operating personnel to point out according to fault handling operation step, easily and accurately can carry out failture evacuation, thus work efficiency and work accuracy can be increased substantially.(3) Substation secondary circuit voltage current transformer pick-up unit of the present utility model, when it uses, can realize carrying out polarity check and nuclear phase to voltage transformer (VT), inductance transformer secondary circuit in transformer station without the need to whole load on transformer substation test, operation danger is low.(4) Substation secondary circuit voltage current transformer pick-up unit of the present utility model, because intelligence degree is higher when it uses, thus low to the requirement of operator, applicability is strong.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model, also show when it uses and electrical connection that Substation secondary circuit primary side and Substation secondary circuit secondary are surveyed in figure;

Fig. 2 is the electrical block diagram of excitation power supply in Fig. 1;

Fig. 3 is the electrical block diagram of hand-held sense terminals in Fig. 1.

Reference numeral in above-mentioned accompanying drawing is as follows:

Excitation power supply 1, signal generating circuit 11, power amplification circuit 12, phase option circuit 13, dsp controller 14, the first wireless communication module 15,

Hand-held sense terminals 2, interface module 21, signal amplification module 22, filtration module 23, A/D modular converter 24, signal processing module 25, the second wireless communication module 26, touch-screen 27, power module 28.

Embodiment

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

(embodiment 1)

See Fig. 1, the Substation secondary circuit voltage current transformer pick-up unit of the present embodiment, forms primarily of excitation power supply 1 and hand-held sense terminals 2.

See Fig. 2, excitation power supply 1 forms primarily of signal generating circuit 11, power amplification circuit 12, phase option circuit 13, dsp controller 14 and the first wireless communication module 15.

Signal generating circuit 11 is provided with power input, electric current and voltage output terminal and trigger pip end; Power amplification circuit 12 and phase option circuit 13 are respectively equipped with electric current and voltage input end, electric current and voltage output terminal and control signal input end; Dsp controller 14 is provided with test trigger signal output terminal, electric current and voltage output control terminal, phase selection signal output part and communication ends; First wireless communication module 15 is provided with internal communication ends and radio communication end.

External AC220V civil power when the power input of signal generating circuit 11 uses; The trigger pip end of signal generating circuit 11 is electrically connected with the test trigger signal output end signal of dsp controller 14; The electric current and voltage input end of power amplification circuit 12 is electrically connected with the electric current and voltage output terminal of signal generating circuit 11; The control signal input end of power amplification circuit 12 is electrically connected with the electric current and voltage output control terminal signal of dsp controller 14; The electric current and voltage input end of phase option circuit 13 is electrically connected with the electric current and voltage output terminal of power amplification circuit 12; The control signal input end of phase option circuit 13 is electrically connected with the phase selection signal output part signal of dsp controller 14; The communication ends of dsp controller 14 is electrically connected with the internal communication ends two-way signaling of the first wireless communication module 15.The electric current and voltage output terminal of phase option circuit 13 has UA, UB, UC, UN, IA, IB and IC totally 7 interfaces.

See Fig. 3, hand-held sense terminals 2 forms primarily of interface module 21, signal amplification module 22, filtration module 23, A/D modular converter 24, signal processing module 25, second wireless communication module 26, touch-screen 27 and power module 28.

Interface module 21 is provided with input interface and signal output part; Signal amplification module 22, filtration module 23 and A/D modular converter 24 be signal input part and signal output part respectively; Signal processing module 25 is provided with detection signal input end, the first communication ends and second communication end; Second wireless communication module 26 is to interior communication ends and radio communication end; Touch-screen 27 is provided with signal input output end.

The input interface of interface module 21 is provided with 6, is respectively Ua, Ub, Uc, Ia, Ib and Ic; These 6 interfaces are electrically connected with the voltage transformer (VT) summation current transformer secondary side of Substation secondary circuit when using; The signal input part of signal amplification module 22 is electrically connected with the signal output part of interface module 21; The signal input part of filtration module 23 is electrically connected with the signal output part of signal amplification module 22; The signal input part of A/D modular converter 24 is electrically connected with the signal output part of filtration module 23; The detection signal input end of signal processing module 25 is electrically connected with the signal output part signal of A/D modular converter 24; First communication ends of signal processing module 25 is electrically connected with the internal communication ends two-way signaling of the second wireless communication module 26; The second communication end of signal processing module 25 is electrically connected with the signal input output end two-way signaling of touch-screen 27; Power module 28 is for providing working power.

During detection, the radio communication end radio communication of the radio communication end of the second wireless communication module 26 of hand-held sense terminals 2 and the first wireless communication module 15 of excitation power supply 1.

The Substation secondary circuit voltage current transformer pick-up unit of the present embodiment, principle of work when it uses and the course of work are summarized as follows:

During use, the transformer test scheme of transformer station to be detected is imported in the signal processing module 25 of hand-held sense terminals 2, testing scheme comprises the mode of connection of all mutual inductors of this transformation station, the criterion whether wiring is correct, detection operation steps and the prompting of fault handling operation step etc.; By the external AC220V civil power of excitation power supply 1 of the Substation secondary circuit voltage current transformer pick-up unit of the present embodiment, the primary side of UA, UB, UC, UN, IA, IB and IC output terminal of the output terminal of the phase option circuit 13 of excitation power supply 1 with the potential and current transformers to be measured of Substation secondary circuit is electrically connected simultaneously; The sinusoidal voltage required for test or required current signal is produced when excitation power supply 1 uses; The secondary side of the input interface of the interface module 21 of hand-held sense terminals 2 with the potential and current transformers to be measured of the secondary circuit of transformation station to be detected is electrically connected; Then, detect the operation indicating of operating personnel by touch-screen 27, corresponding test command is sent to excitation power supply 1, progressively test, when the faults such as wiring error being detected, touch-screen 27 is corresponding provides fault cues, provides the prompting of fault handling operation step simultaneously, detect operating personnel according to the prompting of fault handling operation step, easily and accurately can carry out failture evacuation.

Above embodiment is the explanation to embodiment of the present utility model; but not to restriction of the present utility model; person skilled in the relevant technique is not when departing from spirit and scope of the present utility model; can also make various conversion and change and obtain corresponding equivalent technical scheme, therefore all equivalent technical schemes all should be included into scope of patent protection of the present utility model.

Claims (1)

1. a Substation secondary circuit voltage current transformer pick-up unit, is characterized in that: comprise excitation power supply (1) and hand-held sense terminals (2);
Described excitation power supply (1) comprises signal generating circuit (11), power amplification circuit (12), phase option circuit (13), dsp controller (14) and the first wireless communication module (15);
Signal generating circuit (11) is provided with power input, electric current and voltage output terminal and trigger pip end; Power amplification circuit (12) and phase option circuit (13) are respectively equipped with electric current and voltage input end, electric current and voltage output terminal and control signal input end; Dsp controller (14) is provided with test trigger signal output terminal, electric current and voltage output control terminal, phase selection signal output part and communication ends; First wireless communication module (15) is provided with internal communication ends and radio communication end;
The trigger pip end of signal generating circuit (11) is electrically connected with the test trigger signal output end signal of dsp controller (14); The electric current and voltage input end of power amplification circuit (12) is electrically connected with the electric current and voltage output terminal of signal generating circuit (11); The control signal input end of power amplification circuit (12) is electrically connected with the electric current and voltage output control terminal signal of dsp controller (14); The electric current and voltage input end of phase option circuit (13) is electrically connected with the electric current and voltage output terminal of power amplification circuit (12); The control signal input end of phase option circuit (13) is electrically connected with the phase selection signal output part signal of dsp controller (14); The communication ends of dsp controller (14) is electrically connected with the internal communication ends two-way signaling of the first wireless communication module (15);
Hand-held sense terminals (2) comprises interface module (21), signal amplification module (22), filtration module (23), A/D modular converter (24), signal processing module (25), the second wireless communication module (26), touch-screen (27) and power module (28);
Interface module (21) is provided with input interface and signal output part; Signal amplification module (22), filtration module (23) and A/D modular converter (24) be signal input part and signal output part respectively; Signal processing module (25) is provided with detection signal input end, the first communication ends and second communication end; Second wireless communication module (26) is communication ends and radio communication end internally; Touch-screen (27) is provided with signal input output end;
The signal input part of signal amplification module (22) is electrically connected with the signal output part of interface module (21); The signal input part of filtration module (23) is electrically connected with the signal output part of signal amplification module (22); The signal input part of A/D modular converter (24) is electrically connected with the signal output part of filtration module (23); The detection signal input end of signal processing module (25) is electrically connected with the signal output part signal of A/D modular converter (24); First communication ends of signal processing module (25) is electrically connected with the internal communication ends two-way signaling of the second wireless communication module (26); The second communication end of signal processing module (25) is electrically connected with the signal input output end two-way signaling of touch-screen (27); Power module (28) is for providing working power;
During use, the external AC220V civil power of power input of the signal generating circuit (11) of excitation power supply (1); The electric current and voltage output terminal of the phase option circuit (13) of excitation power supply (1) is electrically connected with the voltage transformer (VT) summation current transformer primary side of Substation secondary circuit to be detected; The input interface of the interface module (21) of hand-held sense terminals (2) is electrically connected with the voltage transformer (VT) summation current transformer secondary side of Substation secondary circuit to be detected; The radio communication end radio communication of the radio communication end of second wireless communication module (26) of hand-held sense terminals (2) and first wireless communication module (15) of excitation power supply (1).
CN201520066203.0U 2015-01-29 2015-01-29 A kind of Substation secondary circuit voltage current transformer pick-up unit CN204536469U (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105652133A (en) * 2016-03-26 2016-06-08 国家电网公司 CT wireless tester based on cell phone platform and synchronous testing method
CN105891664A (en) * 2016-06-14 2016-08-24 李彦吉 Multi-path analog loop and polarity calibration instrument
CN108710054A (en) * 2018-05-25 2018-10-26 云南电网有限责任公司曲靖供电局 Wiring state detection device, method and the secondary circuit system of secondary circuit
CN108845200A (en) * 2018-05-10 2018-11-20 南通盛洋电气有限公司 A kind of method of discrimination and system of transformer safety
CN109709419A (en) * 2018-12-26 2019-05-03 国网上海市电力公司 A kind of Substation secondary circuit state on_line monitoring device
CN111090072A (en) * 2020-03-24 2020-05-01 北京锐创新智科技有限公司 CT loop wireless automatic checking device and checking method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105652133A (en) * 2016-03-26 2016-06-08 国家电网公司 CT wireless tester based on cell phone platform and synchronous testing method
CN105891664A (en) * 2016-06-14 2016-08-24 李彦吉 Multi-path analog loop and polarity calibration instrument
CN105891664B (en) * 2016-06-14 2018-09-11 李彦吉 Multi-analog loop polarity tester
CN108845200A (en) * 2018-05-10 2018-11-20 南通盛洋电气有限公司 A kind of method of discrimination and system of transformer safety
CN108710054A (en) * 2018-05-25 2018-10-26 云南电网有限责任公司曲靖供电局 Wiring state detection device, method and the secondary circuit system of secondary circuit
CN109709419A (en) * 2018-12-26 2019-05-03 国网上海市电力公司 A kind of Substation secondary circuit state on_line monitoring device
CN111090072A (en) * 2020-03-24 2020-05-01 北京锐创新智科技有限公司 CT loop wireless automatic checking device and checking method
CN111090072B (en) * 2020-03-24 2020-07-31 北京锐创新智科技有限公司 CT loop wireless automatic checking device and checking method

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