CN201365142Y - Distribution transformer monitoring terminal with high reliability - Google Patents

Distribution transformer monitoring terminal with high reliability Download PDF

Info

Publication number
CN201365142Y
CN201365142Y CNU2009201053585U CN200920105358U CN201365142Y CN 201365142 Y CN201365142 Y CN 201365142Y CN U2009201053585 U CNU2009201053585 U CN U2009201053585U CN 200920105358 U CN200920105358 U CN 200920105358U CN 201365142 Y CN201365142 Y CN 201365142Y
Authority
CN
China
Prior art keywords
voltage
transformer
monitoring terminal
distribution transformer
reliability
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CNU2009201053585U
Other languages
Chinese (zh)
Inventor
黄益庄
李树军
任如怀
陈楚见
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BEIJING QINGHUA HUALI ELECTRICAL AUTOMATION TECHNOLOGY Co Ltd
Original Assignee
BEIJING QINGHUA HUALI ELECTRICAL AUTOMATION TECHNOLOGY Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by BEIJING QINGHUA HUALI ELECTRICAL AUTOMATION TECHNOLOGY Co Ltd filed Critical BEIJING QINGHUA HUALI ELECTRICAL AUTOMATION TECHNOLOGY Co Ltd
Priority to CNU2009201053585U priority Critical patent/CN201365142Y/en
Application granted granted Critical
Publication of CN201365142Y publication Critical patent/CN201365142Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

The utility model relates to a distribution transformer monitoring terminal with high reliability, comprising a voltage mutual inductor, a current mutual inductor and a power supply which are connected with a CPU chip, the power supply is provided with a wiring terminal connected with a low voltage side of the distribution transformer, and the voltage mutual inductor and the current mutual inductor are provided with the wiring terminals connected with the distribution transformer; the distribution transformer monitoring terminal is characterized in that: the rated voltage of the power supply voltage is 220VAC, the allowable variation is expanded to -15 percent to +35 percent, and the working voltage range is expanded to 185VAC to 300 VAC. The reliability of the power supply is improved and the service life of a remote monitoring terminal is prolonged.

Description

A kind of distribution transformer monitoring terminal of high reliability
Technical field:
The utility model relates to a kind of electric equipment, particularly a kind of distribution transformer monitoring terminal of the operational factor of distribution transformer being monitored, being gathered and controls in distribution network automated.
Background technology:
Distribution transformer is a kind of One's name is legion, the very universal important power equipment of power distribution network.Distribution transformer monitoring terminal TTU (TransformerTerminal Unit) is the important component part of distribution automation system, in system, finish the operational factor of distribution transformer is monitored, gather analog quantitys such as voltage, electric current and on off state and realize to remote measurement, remote signalling, remote control and the remote regulating of distribution transformer and with functions such as Surveillance center communicates by letter, ensureing the reliability service of distribution system, is to realize distribution network automated basis.
The present situation of vast small and medium-sized cities of China and rural power distribution net is: distribution network automated detection is relatively weak, and most of TTU need be installed on the outdoor electric pole, so work under bad environment, and the distribution network automated equipment difference in different regions is very big simultaneously.Outdoor electricity distribution transformer majority is not installed voltage transformer at present, therefore the power supply of distribution transformer monitoring terminal itself can only be taken from the phase voltage of public distribution transformer low-pressure side, and the phase voltage of public distribution transformer low-pressure side is generally all than higher, therefore the TTU of phase voltage that takes from public distribution transformer low-pressure side at present is fragile, and useful life is short.In addition, the outdoor single phase ground fault that often takes place, after this fault takes place, circuit still can move a period of time, but the workload of trouble-shooting point and difficulty are very big, time that causes restoring electricity increases, and present monitoring terminal does not possess the monitoring function of single-phase earthing, gives the distribution network automated very big obstacle that causes.
The utility model content:
The utility model solves the prior art remote terminal because the problem that work under bad environment causes is fragile, useful life is short, and a kind of distribution transformer monitoring terminal of high reliability is provided, and is not fragile, long service life.
The technical solution of the utility model is such: a kind of distribution transformer monitoring terminal of high reliability, comprise the voltage transformer, current transformer and the power supply that link to each other with cpu chip respectively, described power supply has the binding post that links to each other with the distribution transformer low-pressure side, and described voltage transformer, current transformer have the binding post that links to each other with distribution transformer; The rated voltage that it is characterized in that described supply voltage is 220V, and permissible variation is expanded as :-15%~+ 35%, and promptly its voltage power supply range expansion is: 185VAC-300VAC.
Described voltage transformer has seven, and one of them is for surveying the voltage transformer of residual voltage, and described current transformer has seven, and one of them is for measuring the current transformer of zero-sequence current.Described voltage transformer can be respectively is that weak electric signal is delivered to A/D converter with the voltage transformation of two sections buses, be converted to digital quantity and be input to CPU, described current transformer can be transformed to weak electric signal with the three-phase current on the three-phase current of distribution transformer high and low pressure side or two loop line roads and deliver to A/D converter, is converted to digital quantity and is input to CPU.
Described voltage transformer can be 0VAC-480VAC for the scope of the measuring voltage of importing by binding post.
Described CPU also links to each other with wireless communication module, and is to link to each other by optocoupler.
Described CPU also is provided with the RS-485 serial line interface.
Technique effect:
Prior art is mentioned, the work under bad environment of TTU, and at present outdoor electricity distribution transformer majority is not installed voltage transformer, so the power supply of monitoring terminal can only be connected to the low-pressure side of distribution transformer, causes the monitoring terminal easy burn-out, and useful life is short.The applicant investigates through actual, find owing to from transformer to terminate load transmission course circuit the voltage landing is arranged, so the phase voltage of outdoor electricity distribution step down side reaches as high as 260-270VAC usually all than higher.Conventional remote monitoring terminal since power supply generally only be arranged on 220VAC ± 10% or+10% to-15% working range, therefore in fact power supply all is to work under critical condition, therefore burn out easily, the utility model is owing to increase to the permissible variation of the rated voltage 220VAC of supply voltage :-15%~+ 35%; Allow working range then to increase to: 185~300VAC, promptly enlarged the permission working range of supply voltage, even the phase voltage of distribution transformer low-pressure side arrives 270VAC, remain the normal working voltage of power supply, rather than critical condition voltage, therefore improve the reliability of power supply, prolonged the life-span of remote monitoring terminal.
The utility model is owing to there is the input of two-way busbar voltage, therefore, the utility model can be measured 3 phase voltages, 3 phase currents, active power P, reactive power Q, active energy kWH and the reactive energy kVARH of distribution transformer high and low pressure side simultaneously respectively, also can measure the above-mentioned parameter of the circuit of twice same bus section, busbar sections or different bus section, busbar sections simultaneously, because residual voltage and zero sequence current mutual inductor are arranged, can judge single phase ground fault easily simultaneously.
The input range of measuring voltage is expanded as 0-480VAC, can obstructed overvoltage instrument transformer, and directly measure the phase voltage of distribution transformer low-pressure side, and take into full account the working condition that step down side voltage raises.
This distribution transformer monitoring terminal is embedded in wireless communication module, can be directly and main website realize man-to-man radio communication; The RS-485 serial line interface is set simultaneously, can realizes that many playscripts with stage directions utility model device passes through DTU (data acquisition unit) and shares one tunnel radio communication, can save the operating cost of user's radio communication, also can realize multiple communication modes such as wire communication or optical fiber.
Description of drawings:
Fig. 1 is a structural representation of the present utility model.
Embodiment:
Below in conjunction with accompanying drawing the utility model is elaborated.
See Fig. 1, the distribution transformer monitoring terminal of high reliability of the present utility model, comprise cpu chip 1, this chip adopts high performance DSP digital signal processor or high performance electric energy acquisition chip, voltage transformer 2 summation current transformers 3 link to each other with cpu chip 1 by AD conversion 4, the voltage and current analog quantity that collects is converted to digital quantity by AD conversion 4 is sent in the cpu chip 1 and handles (if adopt high performance electric energy acquisition chip, needn't peripheral hardware A/D converter); Power supply 5 is connected in the utility model distribution transformer monitoring terminal, power to monitoring terminal, power supply 5 has the binding post that links to each other with the distribution transformer low-pressure side, voltage transformer 2, current transformer 3 have the binding post that links to each other with distribution transformer, of the present utility modelly be characterised in that the rated voltage of power supply 5 is 220VAC, permissible variation is expanded as :-15%~+ 35%, and promptly its voltage power supply range expansion is 185VAC-300VAC.The applicant investigates through actual, find owing to the voltage landing is arranged from transformer to terminate load transmission course circuit, therefore the phase voltage of outdoor electricity distribution step down side is usually all than higher, load and to reach 260-270VAC when light, rather than the phase voltage of the 220-240VAC that it has been generally acknowledged that, therefore must guarantee that this voltage is the operating voltage of monitoring terminal, so the utility model is decided to be the permissible variation of power supply 5 voltages :-15%~+ 35%, working range is decided to be 185VAC-300VAC, to guarantee when distribution transformer low-pressure side voltage is 260-270VAC, still in the permissible variation scope of power supply 5, rather than critical condition voltage, make power supply 5 unlikely burning out, thereby improved the reliability of power supply 5, prolonged the life-span of distribution transformer monitoring terminal.
Simultaneously, the utility model voltage transformer 2 has seven, and one of them can be used for measuring residual voltage, can insert the three-phase voltage of two sections buses and the residual voltage of one section bus respectively; Current transformer 3 has seven, wherein has one to can be used for measuring zero-sequence current, can insert two groups of three-phase currents respectively, a zero-sequence current.The utility model can have the input of two-way busbar voltage like this, therefore, the utility model is 3 phase voltages, 3 phase currents, active power P, reactive power Q, active energy kWH and the reactive energy kVARH of measuring transformer high and low pressure side simultaneously, but the also above-mentioned parameter of independent measurement two feedback electric line; Simultaneously because zero sequential potential transformer and zero sequence current mutual inductor are arranged, can judge it is any road outlet generation single phase ground fault easily, so that in time fix a breakdown, in the past because after the 10kV single phase ground fault takes place, circuit still can move 2h, but the workload of trouble-shooting point and difficulty are very big, the time growth causes restoring electricity, detect fault in 2 hours that the utility model then can be in time still moves at circuit, trouble shoot and repair time can be shortened, thereby the electric power system continued power can be ensured.
Voltage transformer 2 summation current transformers 3 of the present utility model can be 0VAC-480VAC for the scope of the measuring voltage of importing by binding post, adopt this wide-range, can measure 3 phase voltages, 3 phase currents, active power P, reactive power Q, active energy kWH and the reactive energy kVARH of distribution transformer high and low pressure side simultaneously respectively.And can obstructed overvoltage instrument transformer, directly measure the phase voltage of distribution transformer low-pressure side, and take into full account the working condition that step down side voltage raises.
Cpu chip 1 also links to each other with wireless communication module 6, and is to link to each other by optocoupler 7, and cpu chip 1 also is provided with RS-485 communications serial interface 8.
The utility model cpu chip 1 has jtag interface 9, can field programming.This cpu chip 1 monitors circuit-breaker status and isolation switch state by optocoupler 10, link to each other with keyboard 12, liquid crystal display 13 by decoding circuit 11, branch by output relay 14 control circuit breakers 15, close or control alarm device 16 and report to the police, cpu chip 1 also links to each other with reset circuit with crystal oscillating circuit.

Claims (5)

1, a kind of distributing transformator remote monitoring terminal of high reliability, comprise the voltage transformer, current transformer and the power supply that link to each other with cpu chip respectively, described power supply has the binding post that links to each other with the distribution transformer low-pressure side, and described voltage transformer, current transformer have the binding post that links to each other with distribution transformer; The rated voltage that it is characterized in that described supply voltage is 220VAC, and permissible variation is expanded as :-15%~+ 35%, and promptly its voltage power supply range expansion is: 185VAC-300VAC.
2. the distributing transformator remote monitoring terminal of high reliability according to claim 1 is characterized in that described voltage transformer has seven, and one of them is for surveying the voltage transformer of residual voltage; Described current transformer has seven, and one of them is for surveying the current transformer of zero-sequence current.
3, the distribution transformer monitoring terminal of high reliability according to claim 1 and 2 is characterized in that described voltage transformer can be 0VAC-480VAC for the scope of the measuring voltage of importing by binding post.
5, the distribution transformer monitoring terminal of high reliability according to claim 1 and 2 is characterized in that described CPU also links to each other with wireless communication module, and is to link to each other by optocoupler.
6, the distribution transformer monitoring terminal of high reliability according to claim 1 and 2 is characterized in that described CPU also is provided with the RS-485 serial line interface.
CNU2009201053585U 2009-01-24 2009-01-24 Distribution transformer monitoring terminal with high reliability Expired - Lifetime CN201365142Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2009201053585U CN201365142Y (en) 2009-01-24 2009-01-24 Distribution transformer monitoring terminal with high reliability

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2009201053585U CN201365142Y (en) 2009-01-24 2009-01-24 Distribution transformer monitoring terminal with high reliability

Publications (1)

Publication Number Publication Date
CN201365142Y true CN201365142Y (en) 2009-12-16

Family

ID=41475811

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2009201053585U Expired - Lifetime CN201365142Y (en) 2009-01-24 2009-01-24 Distribution transformer monitoring terminal with high reliability

Country Status (1)

Country Link
CN (1) CN201365142Y (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102043085A (en) * 2010-10-12 2011-05-04 河南省电力公司南阳供电公司 Ultrahigh voltage power grid and current on-load detector
CN105301448A (en) * 2015-11-19 2016-02-03 天津大学 Time synchronization method among small-current grounding devices of coal mine system
CN105717346A (en) * 2016-04-25 2016-06-29 国网天津市电力公司 Monitor for voltage of equipment
CN106169810A (en) * 2015-12-31 2016-11-30 国网山东省电力公司胶州市供电公司 A kind of distribution transformer intelligent checking system based on Radio Transmission Technology
CN108963985A (en) * 2018-07-23 2018-12-07 深圳友讯达科技股份有限公司 Power distribution protective device, system and method
CN111030306A (en) * 2019-12-30 2020-04-17 江苏羚翎电气设备有限公司 Distribution transformer monitoring terminal and monitoring method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102043085A (en) * 2010-10-12 2011-05-04 河南省电力公司南阳供电公司 Ultrahigh voltage power grid and current on-load detector
CN102043085B (en) * 2010-10-12 2015-04-22 国家电网公司 Ultrahigh voltage power grid and current on-load detector
CN105301448A (en) * 2015-11-19 2016-02-03 天津大学 Time synchronization method among small-current grounding devices of coal mine system
CN106169810A (en) * 2015-12-31 2016-11-30 国网山东省电力公司胶州市供电公司 A kind of distribution transformer intelligent checking system based on Radio Transmission Technology
CN105717346A (en) * 2016-04-25 2016-06-29 国网天津市电力公司 Monitor for voltage of equipment
CN108963985A (en) * 2018-07-23 2018-12-07 深圳友讯达科技股份有限公司 Power distribution protective device, system and method
CN111030306A (en) * 2019-12-30 2020-04-17 江苏羚翎电气设备有限公司 Distribution transformer monitoring terminal and monitoring method

Similar Documents

Publication Publication Date Title
CN201365142Y (en) Distribution transformer monitoring terminal with high reliability
CN101908780B (en) Intelligent remote monitoring box-type substation
CN101409008B (en) Integrated system for monitor, management and remotely meter-reading of power distribution network
CN103091602B (en) Power line carrier wave online fault detection device
CN203422438U (en) Real-time monitoring and fault location system for overhead lines of power distribution network
CN101127456A (en) Intelligent management system for transformer substation assisted devices
CN101202469A (en) Distributing transformator remote monitoring terminal based on embedded system
CN201893540U (en) Intelligent radio network dispatching digital-type boundary controller complete equipment
CN204992272U (en) Dual supply massive quantity power supply and high expanded pull -out type measuring equipment that does not repeat of low meter that supplies
CN202150740U (en) Intelligent monitoring system for distribution transformer platform area
CN203423539U (en) Low-voltage power grid load and leak current integrated monitoring device
CN203312920U (en) Intelligent integrated system of PT cabinet
CN104993601A (en) Box-type substation remote control system
Kumar et al. Method for monitoring of distribution transformer
CN201270385Y (en) Intelligent synthetic electric distribution box
CN202503368U (en) Intelligent distributed power distribution monitoring device
CN204167883U (en) A kind of 10kV line short fault microcomputer protective relay device
CN201868896U (en) Economic operation system of transformer
CN204481573U (en) The customizable electric intelligent terminal of a kind of low pressure feeder unit load
CN201887557U (en) High-voltage electricity intelligent monitoring device
CN201749168U (en) On-line monitoring system for circuit operation failure
CN205544591U (en) Power station monitoring system is joined in marriage to touch -sensitive screen
CN204992580U (en) Expanded not repeated fixed measuring equipment of dual power supply
CN204992274U (en) Dual supply massive quantity power supply and high expanded not repeated fixed measuring equipment of low meter that supplies
CN204992273U (en) Expanded pull -out type measuring equipment that does not repeat of dual power supply

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
EE01 Entry into force of recordation of patent licensing contract

Assignee: Suzhou Wanlong Electric Group Co., Ltd.

Assignor: Beijing Qinghua Huali Electrical Automation Technology Co., Ltd.

Contract record no.: 2010990000208

Denomination of utility model: Distribution transformer monitoring terminal with high reliability

Granted publication date: 20091216

License type: Exclusive License

Record date: 20100419

EC01 Cancellation of recordation of patent licensing contract

Assignee: Suzhou Wanlong Electric Group Co., Ltd.

Assignor: Beijing Qinghua Huali Electrical Automation Technology Co., Ltd.

Contract record no.: 2010990000208

Date of cancellation: 20110608

EE01 Entry into force of recordation of patent licensing contract

Assignee: Sheyang Weilong Electric Co., Ltd.

Assignor: Beijing Qinghua Huali Electrical Automation Technology Co., Ltd.

Contract record no.: 2013320010004

Denomination of utility model: Distribution transformer monitoring terminal with high reliability

Granted publication date: 20091216

License type: Exclusive License

Record date: 20130124

LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model
CX01 Expiry of patent term

Granted publication date: 20091216

CX01 Expiry of patent term