CN201717672U - Distribution transformer monitoring terminal - Google Patents

Distribution transformer monitoring terminal Download PDF

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Publication number
CN201717672U
CN201717672U CN2010202156613U CN201020215661U CN201717672U CN 201717672 U CN201717672 U CN 201717672U CN 2010202156613 U CN2010202156613 U CN 2010202156613U CN 201020215661 U CN201020215661 U CN 201020215661U CN 201717672 U CN201717672 U CN 201717672U
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China
Prior art keywords
module
processing unit
central processing
distribution transformer
mouth
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Expired - Fee Related
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CN2010202156613U
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Chinese (zh)
Inventor
陈财建
柴若愚
李明
罗海卫
张辉全
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CHENGDU XINGYU ENERGY-SAVING TECHNOLOGY STOCK Co Ltd
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CHENGDU XINGYU ENERGY-SAVING TECHNOLOGY STOCK Co Ltd
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Abstract

The utility model discloses a distribution transformer monitoring terminal which belongs to the distribution transformer auxiliary equipment field and comprises a casing, a power supply module, a voltage acquisition module, a current acquisition module, an A/D conversion module, a metering module, a central processor, a communication module, a LCD module and a keyboard module, also comprises a remote signal input module, relay output module, a GPRS module, an Ethernet module and etc. The distribution transformer monitoring terminal has the advantages of comprehensive functions, reliable performance, high accuracy, high speed, mass storage, remote communication and multi-loop reactive power compensation.

Description

The distribution transformer monitor terminal device
Technical field
The utility model relates to a kind of distribution transformer auxiliary equipment, particularly a kind of distribution transformer supervising device.
Background technology
Distribution transformer is a power equipment of electric energy directly being distributed to low-voltage customer, and its service data is the important component part of whole distribution network basic data.Along with improving constantly of industrial automation level, enterprise is more and more higher to the requirement of power supply quality (as rate of qualified voltage, frequency etc.), power supply reliability, power supply enterprise is when carrying out planning and designing, present situation to electrical network will be had at fingertips, industry expand apply to install, new user starts to exchange fire, system's increase-volume, transformer are layouted daily planning such as relates to and must have scientific basis, concerning the production division of power supply enterprise, the safety of equipment is the emphasis of paying close attention to.More than some is all closely bound up with the distribution transformer reliability service, thereby need monitor the running status of electrical network distribution transformer.
At present to the device of the running state monitoring of electrical network distribution transformer, there is following weak point in their major part: the one, and function is incomplete: what have has only measuring ability; What have has a controlled function, but function singleness; The 2nd, low precision, automatization level is low; The 3rd, the reactive power compensation control loop is few, and compensation way is single; The 4th, communication interface is few, and telecommunication realizes difficulty.
The utility model content
Goal of the invention of the present utility model is: at the problem of above-mentioned existence, provide a kind of multiple functional, dependable performance, precision height, at a high speed, the distribution transformer monitor terminal device of big capacity storage, telecommunication, multiloop reactive power compensation.
The technical solution adopted in the utility model is such: a kind of distribution transformer monitor terminal device, comprise shell, power module, voltage acquisition module, current acquisition module, A/D modular converter, metering module, central processing unit, communication module, Liquid Crystal Module and Keysheet module, also comprise remote signalling input module and relay output module
Described power supply sampling module is made up of power management chip and power-switching circuit, the work of generator and control out-put supply;
The output of described voltage sample module is connected with the input of A/D modular converter and metering module respectively;
The output of described current sample module also is connected with the input of A/D modular converter and metering module respectively;
The output of described A/D modular converter and metering module all is connected with the IO mouth of central processing unit;
Described communication module is formed 6 road serial communication interfaces by serial ports expansion chip, infrared communication module, MAX3232 and MAX1487, and corresponding infrared communication interface, 232 interfaces and 485 interfaces are set on central processing unit, described 485 interfaces comprise 485 check meter interface and 485 reactive power compensation interfaces; Described Liquid Crystal Module is connected with the IO mouth of central processing unit, and corresponding LCD interface is set on central processing unit; Described Keysheet module is connected with the IO mouth of central processing unit, and corresponding keyboard interface is set on central processing unit; Described remote signalling input module is made up of Acquisition Circuit and buffer circuit; And be connected with the IO mouth of central processing unit; Described relay output control module is made up of buffer circuit and control circuit, and is connected with the IO mouth of central processing unit; Described central processing unit also is connected with real-time clock, data storage and power management chip.Described distribution transformer monitor terminal device adopts the three-phase complementary power supply.
As preferably: described current sample module comprises AC sampling module and direct current sampling module, and the direct current sampling module is made up of TVS and amplifying circuit.
As preferably: also comprise the GPRS module, described GPRS module links to each other with the IO mouth of central processing unit, and is provided with corresponding GPRS interface on central processing unit.
As preferably: also comprise ethernet module, described ethernet module links to each other with the IO mouth of central processing unit, and is provided with corresponding Ethernet interface on central processing unit.
As further preferred: described ethernet module comprises charging and discharging lithium battery module and ethernet communication module.
In sum, owing to adopted technique scheme, the beneficial effects of the utility model are:
1, monitors the operational factor of distribution transformer in real time, comprise three-phase voltage, three-phase current, meritorious (idle) merit of three-phase, power factor, frequency, meritorious (idle) electric weight, oil temperature, hydraulic pressure etc.; 6 tunnel (passive idle contact) remote signalling input (also can be configured to the pulse input); Has SOE sequence of events recording function, temporal resolution 1ms, 1000 of recording events; 2 groups of (4 road SBO relay) remote control outputs can realize distant place branch, closing operation to 2 switch object;
2, carry out voltage, electric current, meritorious, reactive power, power factor in real time, frequency out-of-limit detects; The out-of-limit detection of high order harmonic component aberration rate; The out-of-limit detection of three-phase current unbalance; Transformer interior oil temperature, the out-of-limit detection of pressure etc.Testing result can amount of logic reports and shows output;
3, statistics comprises curve statistics, day statistics and month statistics three parts.Built-in jumbo quick FLASH of this product and ferroelectric data storage, can mass memory 2 months curve datas, day half a year statistics and the moon half a year statistics.
(1), the curve statistical interval is 15 minutes multiples, can establish.Can store the curve data in February.Recording voltage, electric current, active power, reactive power, power factor, forward active energy, forward reactive energy, reverse active energy, reverse reactive energy, voltage harmonic, current harmonics etc.;
(2), day is added up a day interruption duration, accumulative total has a power failure day, the recording voltage qualification rate, forward is meritorious, oppositely meritorious, forward is idle, oppositely idle, one, the four-quadrant reactive energy, maximum meritorious requirement and time, maximum idle requirement and time, meritorious maximum demand of forward and time, oppositely meritorious maximum demand and time, idle maximum demand of forward and time, reverse idle maximum demand and time, voltage minimax extreme value, meritorious minimax extreme value, idle minimax extreme value, apparent power minimax extreme value, power factor (PF) minimax extreme value, unsymmetrical current minimax extreme value, load factor minimax extreme value, write down capacitor and data such as actuating of relay number of times and making time along separate routes.
Month (3), meritorious maximum demand of a statistics forward and time, oppositely meritorious maximum demand and time, the idle maximum demand of forward and time, reverse idle maximum demand and time, the record moon data such as rate of qualified voltage, equipment work record of reliability.
4, the multiple serial data interface of the utility model standard configuration (1 tunnel infrared, 2 tunnel 485 and 3 tunnel 232): built-in GPRS module, the user only need apply for that a GPRS mobile number just can realize remote wireless monitoring, GPRS adopts online mode always;
The built-in ethernet module, the user only need distribute an IP address and netting twine, just can realize the operation of networking monitoring Distribution Transformer Terminal Unit.The communication speed of Ethernet is fast, and data volume is big, and in real time, efficiently, later stage operating cost is low.
Realize reactive power compensation control output with one in 485 interfaces.Can control 32 tunnel intelligence capacitors at most.The user can select " three-phase is mended entirely altogether ", " three-phase divides benefit entirely ", " mixed compensation " three kinds of compensation ways according to actual conditions, the user need not import every road capacitor volume, the utility model can read condenser capacity and state automatically when power-up initializing, also can manually read.The utility model with reactive power, power factor (PF) or voltage as control parameter, the user is provided with the switching parameter according to actual electric network ruuning situation, this has just been avoided at little load, switching vibrates under the situation of low-power factor, adopt switching budget and return difference, just avoid the vibration of critical value, improved the stability of system.The utility model has been added up the operation of power networks data before and after the action frequency of every road capacitor and making time and the action, for loading and analyze and statistics for, electricity consumption department.
5, the utility model adopts the three phase mains complementary technology, guarantees any 2 phase phase shortages in three-phase, and equipment can both operate as normal.
6, the utility model adopts the sampling of 2 road direct currents, detects the variation of outside dc state.
7, the utility model adopts 6 tunnel remote signalling input, and its displacement time and number of times are write down in the displacement of monitoring external switch amount.Remote signalling resolution can reach 1Ms.
8, the utility model adopts the output of No. 4 relays, easily realizes the control of power control and electric energy control or circuit breaker.
9, certainty of measurement of the present utility model:
0.2 grade of voltage, 0.2 grade in electric current, 0.1 grade of frequency, 0.2 grade of power factor (PF), 1 grade of active power, 2 grades of reactive powers, 1 grade of active electrical degree, 2 grades of idle electric degrees.
Description of drawings
Fig. 1 is the structured flowchart of the utility model embodiment 1.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Embodiment 1:
As shown in Figure 1, a kind of distribution transformer monitor terminal device, comprise shell, power module, voltage acquisition module, current acquisition module, A/D modular converter, metering module, central processing unit, communication module, Liquid Crystal Module and Keysheet module, also comprise remote signalling input module and relay input module;
Described power supply sampling module is made up of power management chip and power-switching circuit, the work of generator and control out-put supply;
The output of described voltage sample module is connected with the input of A/D modular converter and metering module respectively; The output of described current sample module also is connected with the input of A/D modular converter and metering module respectively; AC signal is sampled through CT and PT conversion back input amplifying circuit TL2254 amplification back input CPU, calculates the each harmonic content in the electrical network, the highest can reaching 31 times; The direct current sampling module is made up of TVS and amplifying circuit, detects the variation of outside DC quantity, adopts the difference amplifying technique, can detect the very little variation of DC quantity;
Metering module adopts the professional watt metering chip Att7022B of the poly-power in Zhuhai, and it can gather three-phase voltage simultaneously, electric current, active power, reactive power, electric degree, frequency, the electric network data of our care of zero-sequence current or the like.The precision of voltage and current is 0.5%, and meritorious precision is 0.2S, and idle precision is 2S.Adopt the computation chip of specialty, guarantee precision the collection of distribution transformer service data;
Central processing unit adopts TMS320F2812, and it is the Industry Control specialty DSP of Texas Instrument, aboundresources.Has independently hardware multiplier, 128K word flash memory, 16K word RAM, 128 secret key, 2 serial ports, 1 SPI mouth, 1 IIC mouth, 16 tunnel 12 AD.The speed of service is fast, and kind can be moved 1.5 hundred million instructions (150MIPS) in 1 second.Guarantee in real time, gather efficiently, handle the service data of distribution transformer;
Communication module is formed 6 road serial communication interfaces by serial ports expansion chip, infrared communication module, MAX3232 and MAX1487.The TL16CP754C of Texas Instrument is the running frequency of supporting up to 48MHz, and the first-in first-out of 64 bytes (FIFO) buffering is supported RS-485 pattern and infrared mode, can expand 4 paths.Infrared communication solves short-distance wireless communication, can read and revise equipment operation parameter, real time data in the scene.Adopt RS-485 to connect peripheral smart machine.RS232 carries out system maintenance;
Liquid Crystal Module adopts the 160*160 display module of the sharp wide temperature of letter, the resolution height, and clear display shows service data and Control Parameter in real time.
Keysheet module adopts 4 key boards, and " cancellation ", " determining ", " going up (+) " and " (-) down " constitutes the simple key-press group, realize turning over screen, modify feature, man-machine exchange is directly perceived, and is efficient;
The remote signalling input module, the displacement situation of detection external switch amount writes down the time and the number of times of its displacement.Do to form by Acquisition Circuit and buffer circuit.The detection resolution minimum is 1Ms;
The relay output control module is made up of buffer circuit and control circuit, realizes the control of closing a floodgate and trip of circuit breaker to external electric equipment;
The output of described A/D modular converter and metering module all is connected with the IO mouth of central processing unit; Described communication module is formed 6 road serial communication interfaces by serial ports expansion chip, infrared communication module, MAX3232 and MAX1487, and corresponding infrared communication interface, 232 interfaces and 485 interfaces are set on central processing unit, described 485 interfaces comprise 485 check meter interface and 485 reactive power compensation interfaces; Described Liquid Crystal Module is connected with the IO mouth of central processing unit, and corresponding LCD interface is set on central processing unit; Described Keysheet module is connected with the IO mouth of central processing unit, and corresponding keyboard interface is set on central processing unit; Described remote signalling input module is made up of Acquisition Circuit and buffer circuit; And be connected with the IO mouth of central processing unit; Described relay output control module is made up of buffer circuit and control circuit, and is connected with the IO mouth of central processing unit;
Described central processing unit also is connected with real-time clock, data storage and power management chip;
Data storage is made up of the AT45BD321D of 1 ferroelectric FR24CL64 and 2 Atmel companies, up to the memory space of 8MByte.Can store 2 months curve data (15 minutes at interval), day statistics and month statistics of half a year, the statistics of 8 kilowatt-hour meters;
Power management chip adopts the TPS767D318 of Texas Instrument, it be this to duplicate supply DSP power source special chip, it provides the core power of 1.8V and the IO mouth power supply of 3.3V simultaneously.It can provide the electric current up to 800mA, guarantees the steady operation of host CPU, thus the stable operation of the system of assurance.Real-time clock adopts the DS3231 of Maxim, and it adopts technique for temperature compensation, and error is guaranteed the accuracy of system clock less than 25PPM under the normal temperature;
Power supply adopts the three-phase alternating current complementary technology, and by entering the rectifier bridge rectification after three AC transformer step-downs, the LM2576 through state half produces 12V and 5V power supply again.LM2576 is the semi-professional switching power source chip of state, and electric current is big, can reach 3A, and the efficient height up to 84%, is guaranteed the stable operation of entire equipment;
Can also comprise the GPRS module, described GPRS module links to each other with the IO mouth of central processing unit, and is provided with corresponding GPRS interface on central processing unit;
Can also comprise ethernet module, described ethernet module links to each other with the IO mouth of central processing unit, and is provided with corresponding Ethernet interface on central processing unit, and described ethernet module comprises charging and discharging lithium battery module and ethernet communication module.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.

Claims (6)

1. distribution transformer monitor terminal device, comprise shell, power module, voltage acquisition module, current acquisition module, A/D modular converter, metering module, central processing unit, communication module, Liquid Crystal Module and Keysheet module, it is characterized in that: also comprise remote signalling input module and relay output module
Described power supply sampling module is made up of power management chip and power-switching circuit, the work of generator and control out-put supply;
The output of described voltage sample module is connected with the input of A/D modular converter and metering module respectively;
The output of described current sample module also is connected with the input of A/D modular converter and metering module respectively;
The output of described A/D modular converter and metering module all is connected with the IO mouth of central processing unit;
Described communication module is formed 6 road serial communication interfaces by serial ports expansion chip, infrared communication module, MAX3232 and MAX1487, and corresponding infrared communication interface, 232 interfaces and 485 interfaces are set on central processing unit, described 485 interfaces comprise 485 check meter interface and 485 reactive power compensation interfaces;
Described Liquid Crystal Module is connected with the IO mouth of central processing unit, and corresponding LCD interface is set on central processing unit;
Described Keysheet module is connected with the IO mouth of central processing unit, and corresponding keyboard interface is set on central processing unit;
Described remote signalling input module is made up of Acquisition Circuit and buffer circuit; And be connected with the IO mouth of central processing unit;
Described relay output control module is made up of buffer circuit and control circuit, and is connected with the IO mouth of central processing unit;
Described central processing unit also is connected with real-time clock, data storage and power management chip.
2. distribution transformer monitor terminal device according to claim 1 is characterized in that: described distribution transformer monitor terminal device adopts the three-phase complementary power supply.
3. distribution transformer monitor terminal device according to claim 1 is characterized in that: described current sample module comprises AC sampling module and direct current sampling module, and the direct current sampling module is made up of TVS and amplifying circuit.
4. distribution transformer monitor terminal device according to claim 1 is characterized in that: also comprise the GPRS module, described GPRS module links to each other with the IO mouth of central processing unit, and is provided with corresponding GPRS interface on central processing unit.
5. distribution transformer monitor terminal device according to claim 1 is characterized in that: also comprise ethernet module, described ethernet module links to each other with the IO mouth of central processing unit, and is provided with corresponding Ethernet interface on central processing unit.
6. distribution transformer monitor terminal device according to claim 5 is characterized in that: described ethernet module comprises charging and discharging lithium battery module and ethernet communication module.
CN2010202156613U 2010-06-04 2010-06-04 Distribution transformer monitoring terminal Expired - Fee Related CN201717672U (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103033717A (en) * 2012-12-28 2013-04-10 安徽中兴继远信息技术股份有限公司 Oversampling distribution transformer terminal
CN103618381A (en) * 2013-11-13 2014-03-05 国家电网公司 Protecting and measuring integrated comprehensive distribution box
CN103837728A (en) * 2012-11-21 2014-06-04 北京航天正信科技有限公司 Comprehensive tester for passive three-phase electric parameters
CN103840552A (en) * 2014-02-14 2014-06-04 深圳供电局有限公司 Power distribution room monitoring method and system
CN104767209A (en) * 2015-02-13 2015-07-08 杭州水杉科技有限公司 Intelligent connection reactive compensation control instrument and control method thereof
CN105529723A (en) * 2015-02-13 2016-04-27 杭州水杉科技有限公司 Intelligent reactive compensation device
CN106209385A (en) * 2016-08-30 2016-12-07 国网山东省电力公司滨州供电公司 A kind of electrical network detection device based on multiple authentication manipulation authority
CN111509735A (en) * 2020-06-09 2020-08-07 恒一电气集团有限公司 High-precision multifunctional reactive compensation controller
CN115290969A (en) * 2022-10-08 2022-11-04 成都通用整流电器研究所 Intelligent power distribution multi-analog sampling device

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103837728A (en) * 2012-11-21 2014-06-04 北京航天正信科技有限公司 Comprehensive tester for passive three-phase electric parameters
CN103033717A (en) * 2012-12-28 2013-04-10 安徽中兴继远信息技术股份有限公司 Oversampling distribution transformer terminal
CN103618381A (en) * 2013-11-13 2014-03-05 国家电网公司 Protecting and measuring integrated comprehensive distribution box
CN103618381B (en) * 2013-11-13 2017-06-20 王成楷 Protection measurement and control integration comprehensive distribution box
CN103840552A (en) * 2014-02-14 2014-06-04 深圳供电局有限公司 Power distribution room monitoring method and system
CN103840552B (en) * 2014-02-14 2016-05-04 深圳供电局有限公司 A kind of power distribution room monitoring method and system
CN104767209A (en) * 2015-02-13 2015-07-08 杭州水杉科技有限公司 Intelligent connection reactive compensation control instrument and control method thereof
CN105529723A (en) * 2015-02-13 2016-04-27 杭州水杉科技有限公司 Intelligent reactive compensation device
CN106209385A (en) * 2016-08-30 2016-12-07 国网山东省电力公司滨州供电公司 A kind of electrical network detection device based on multiple authentication manipulation authority
CN111509735A (en) * 2020-06-09 2020-08-07 恒一电气集团有限公司 High-precision multifunctional reactive compensation controller
CN115290969A (en) * 2022-10-08 2022-11-04 成都通用整流电器研究所 Intelligent power distribution multi-analog sampling device

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

Granted publication date: 20110119

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