CN103713187B - A kind of distributing transformer monitoring device - Google Patents
A kind of distributing transformer monitoring device Download PDFInfo
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- CN103713187B CN103713187B CN201310755615.0A CN201310755615A CN103713187B CN 103713187 B CN103713187 B CN 103713187B CN 201310755615 A CN201310755615 A CN 201310755615A CN 103713187 B CN103713187 B CN 103713187B
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Abstract
The embodiment of the invention discloses a kind of distributing transformer monitoring device, including: voltage detection unit, for measuring the three-phase voltage analogue signal obtaining distribution transformer；Current detecting unit, for measuring the three-phase current analogue signal obtaining each duplexure of distribution transformer；Temperature detecting unit, for measuring running temperature analogue signal and the environment temperature simulation signal obtaining distribution transformer；The sampling A/D chip being connected with described temperature detecting unit, described voltage detection unit and described current detecting unit respectively, for the analogue signal received is processed, obtain the network load parameters number signal of each phase line of running temperature digital signal, ambient temperature digital signal and each duplexure；And the microcontroller being connected with described sampling A/D chip, for the above-mentioned digital signal read is converted to corresponding actual value, to realize running temperature, temperature rise situation and the on-line monitoring of branch's sharing of load situation thereof to distribution transformer.
Description
Technical field
The present invention relates to temperature monitoring and electric load monitoring technical field thereof, more particularly, it relates to one
Plant distributing transformer monitoring device.
Background technology
When running temperature and/or the temperature rise of distribution transformer easily occur distribution transformer excess temperature to burn when transfiniting
Accident, therefore when potential safety hazards such as discovery running temperature and/or temperature rise transfinite, needs to excise in time distribution
The sub-load of transformator is to avoid the generation of described excess temperature burnout failure；Additionally at described distribution transformer
In running, if the load (i.e. branch's load) of carrying on distribution transformer each bar duplexure occurs
Serious unbalanced phenomenon, then influence whether the safety and economic operation of power distribution network.
Therefore, it is necessary to running temperature, temperature rise situation and branch's load thereof of described distribution transformer is divided
The situation of joining carries out on-line monitoring, in order to finding that distribution transformer exists that running temperature transfinites, temperature rise is transfinited
During etc. potential safety hazard and/or branch's sharing of load serious unbalanced phenomenon, corresponding measure pair can be taked in time
The operating condition of described distribution transformer regulates and controls, thus avoid described distribution transformer because of excess temperature burn,
And ensure the safety and economic operation of described power distribution network.
Summary of the invention
In view of this, the present invention provides a kind of distributing transformer monitoring device, to realize distribution transformer
Running temperature, temperature rise situation and the on-line monitoring of branch's sharing of load situation thereof.
A kind of distributing transformer monitoring device, including:
Voltage detection unit, for measuring the three-phase voltage analogue signal obtaining distribution transformer；
Current detecting unit, for measuring the three-phase current obtaining each duplexure of described distribution transformer
Analogue signal；
Temperature detecting unit, for measuring running temperature analogue signal and the institute obtaining described distribution transformer
The environment temperature simulation signal of place's environment；
It is connected with described temperature detecting unit, described voltage detection unit and described current detecting unit respectively
Sampling A/D chip, for the analogue signal received is processed, obtain running temperature digital signal,
The network load parameters number signal of each phase line of ambient temperature digital signal and each duplexure；
And the microcontroller being connected with described sampling A/D chip, to the digital signal read
Reason, obtains each phase line of actual motion temperature value, actual environment temperature value and each duplexure
Actual electric network load parameter.
Wherein, described voltage detection unit includes:
First voltage transformer, for measuring the A phase voltage analogue signal obtaining described distribution transformer；
Second voltage transformer, for measuring the B phase voltage analogue signal obtaining described distribution transformer；
Tertiary voltage transformer, for measuring the C phase voltage analogue signal obtaining described distribution transformer.
Wherein, described current detecting unit includes: be separately positioned on the different branches of described distribution transformer
Current transformer on the not isopen in loop.
Wherein, described sampling A/D chip includes duplexure sampling A/D chip and temperature sampling chip.
Wherein, described duplexure sampling A/D chip and/or described temperature sampling chip include CS5463 chip.
Wherein, described temperature detecting unit includes PT100 temperature sensor；Wherein said PT100 temperature
Sensor includes the temperature sensor of two-wire system PT100.
Wherein, described microcontroller includes STM32F103 Series of MCU.
Alternatively, described distributing transformer monitoring device also includes: be connected to described microcontroller and distribution
Communication module between terminal, for by described actual motion temperature value, described actual environment temperature value with
And the actual electric network load parameter output of each phase line of described each duplexure is to described distribution terminal；
Wherein said communication module includes isolated form RS485 communication module.
Alternatively, described distributing transformer monitoring device also includes: with depositing that described microcontroller is connected
Storage module, is used for storing described actual motion temperature value, described actual environment temperature value and described each
The actual electric network load parameter of each phase line of duplexure；Wherein said memory module includes that ferroelectricity stores
Device FRAM.
Alternatively, described distributing transformer monitoring device also includes: the instruction being connected with described microcontroller
Module；Described indicating module is for indicating the operating condition of described distributing transformer monitoring device.
From above-mentioned technical scheme it can be seen that the embodiment of the present invention passes through sampling A/D chip to voltage, electric current
The output signal of detector unit carries out integrated treatment, and the electrical network of each phase line obtaining each duplexure is born
Lotus parameters number signal, is carried out the output signal of temperature detecting unit also by described sampling A/D chip simultaneously
Process, obtain running temperature digital signal and ambient temperature digital signal；Finally read by microcontroller
State digital signal, and be converted into corresponding actual value.Wherein actual motion temperature value and actual environment
The difference of temperature value is the temperature rise of described distribution transformer, and thus, staff is according to described microcontroller
The actual motion temperature value of output and actual environment temperature value, can realize the operation temperature to distribution transformer
Degree and the on-line monitoring of temperature rise situation thereof；Meanwhile, staff is by analyzing the output of described microcontroller
The actual electric network load parameter of each phase line of each duplexure, can be calculated each bar duplexure
The electric load carried respectively, it is achieved thereby that online to branch's sharing of load situation of distribution transformer
Monitoring.
Based on this, staff is finding that distribution transformer exists the peaces such as running temperature transfinites, temperature rise is transfinited
When full hidden danger and/or the serious unbalanced phenomenon of branch's sharing of load, corresponding measure can be taked in time to institute
The operating condition stating distribution transformer regulates and controls, thus avoids described distribution transformer and burn because of excess temperature
Ruin and ensure that the safety and economic operation of described power distribution network.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below,
Accompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is a kind of distributing transformer monitoring device structural representation disclosed in the embodiment of the present invention one；
Fig. 2 is the embodiment of the present invention one another distributing transformer monitoring device structural representation disclosed；
Fig. 3 is the embodiment of the present invention two another distributing transformer monitoring device structural representation disclosed.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.
Seeing Fig. 1, the embodiment of the present invention one discloses a kind of distributing transformer monitoring device, to realize joining
The running temperature of piezoelectric transformer, temperature rise situation and the on-line monitoring of branch's sharing of load situation thereof, including:
Voltage detection unit 100, current detecting unit 200, temperature detecting unit 300, sampling A/D chip 400 and
Microcontroller 500.
Wherein, voltage detection unit 100, for measuring the three-phase voltage analogue signal obtaining distribution transformer.
Current detecting unit 200, for measuring the three-phase electricity obtaining each duplexure of described distribution transformer
Flow field simulation signal.
Temperature detecting unit 300, for measure obtain described distribution transformer running temperature analogue signal and
The environment temperature simulation signal of local environment.
Wherein, for oil immersion-type distribution transformer, described running temperature analogue signal is specially this oil
The oil temperature analogue signal of immersion distribution transformer.
Sampling A/D chip 400 respectively with voltage detection unit 100, current detecting unit 200 and temperature detection list
Unit 300 is connected, for the analogue signal received is processed, obtain running temperature digital signal,
The network load parameters number signal of each phase line of ambient temperature digital signal and each duplexure.
Concrete, the sampling A/D chip 400 described running temperature analogue signal to receiving and described environment temperature
Degree analogue signal carries out analog digital conversion, obtains described running temperature digital signal and described ambient temperature numeral
Signal；Three-phase voltage analogue signal and described distribution transformer to the described distribution transformer received simultaneously
The three-phase current analogue signal of each duplexure of device carries out analog digital conversion and calculating, obtains described each point
The network load parameters number signal of each phase line of Zhi Huilu.
Wherein said network load parameter can include voltage, electric current, active power, reactive power, apparent
Power and power factor etc..
Microcontroller 500 is connected with sampling A/D chip 400, for the digital signal read is processed,
Obtain the reality of each phase line of actual motion temperature value, actual environment temperature value and each duplexure
Network load parameter.
The difference of wherein said actual motion temperature value and described actual environment temperature value is described distribution transformer
The temperature rise of device.
Concrete, in described distribution transformer temperature device work process, microcontroller 500 is to sampling
Chip 400 carries out initial configuration, and monitors its running status in real time, chip 400 to be sampled samples,
Calculating can point out microcontroller 500 data to be read to be ready for ready after completing, now microcontroller 500
Read sampling A/D chip 400 process the digital signal obtained and change accordingly, obtain corresponding reality
Value；Described actual motion temperature value that thus staff exports according to microcontroller 500 and described reality
Ambient temperature value, can realize the running temperature to distribution transformer and the on-line monitoring of temperature rise situation thereof；
Meanwhile, staff is by analyzing each phase line of described each duplexure of microcontroller 500 output
Actual electric network load parameter, the electric load that each bar duplexure carries respectively can be calculated, from
And achieve the on-line monitoring of the branch's sharing of load situation to distribution transformer.
Each building block below for the distributing transformer monitoring device described in the present embodiment one enters
One step illustrates:
1) voltage detection unit 100
Voltage detection unit 100 described in the present embodiment one includes three voltage transformers；Wherein, single
The single-phase voltage analogue signal obtaining distribution transformer measured by described voltage transformer for correspondence；
Concrete, voltage detection unit 100 includes:
First voltage transformer, for measuring the A phase voltage analogue signal obtaining distribution transformer；
Second voltage transformer, for measuring the B phase voltage analogue signal obtaining distribution transformer；
Tertiary voltage transformer, for measuring the C phase voltage analogue signal obtaining distribution transformer.
Owing to each duplexure of distribution transformer is in parallel, the electricity of the phase isopen of the most each duplexure
Pressure value is equal, now by measuring the three-phase voltage analogue signal obtaining distribution transformer either branch loop,
The three-phase voltage analogue signal of each duplexure of distribution transformer can be acquired.
More specifically, described voltage transformer preferable current mode voltage transformer；
According to the different purposes of described voltage transformer, described voltage transformer can be divided into protection voltage
Transformer and measurement voltage transformer.Wherein said measurement voltage transformer is for normally supplying at electrical network
During electricity, measure the information of voltage of transmission line of electricity.Voltage transformer 100 in the present embodiment one is measurement
With voltage transformer, and the current mode voltage transformer that preferably anti-interference is stronger, to ensure to measure knot
The accuracy of fruit.
2) about current detecting unit 200
Current detecting unit 200 described in the present embodiment one includes: be separately positioned on distribution transformer not
With the current transformer on the not isopen of duplexure；Total number of described current transformer is described point
3 times of total number of Zhi Huilu；Wherein, a described voltage transformer obtains described distribution for measurement
The monophase current analogue signal of one duplexure of transformator.
More specifically, described current transformer uses Verification of Measuring Current Transformer.
According to the different purposes of described current transformer, described current transformer can be divided into protection electric current
Transformer and Verification of Measuring Current Transformer；Wherein said Verification of Measuring Current Transformer is for normally supplying at electrical network
During electricity, measure the current information of transmission line of electricity.
3) about temperature detecting unit 300
Temperature detecting unit 300 includes for measuring the first temperature obtaining described running temperature analogue signal
Sensor and obtain the second temperature sensor of described environment temperature simulation signal for measuring.
Described first temperature sensor and the second temperature sensor preferred PT100 temperature sensor.Described
PT100 temperature sensor uses the encapsulation of rustless steel sleeve pipe, the most durable in use, little additionally, due to its profile
Ingeniously, have multiple probe size optional, the most economical and the most practical and adapt to wide, additionally have anti-vibration,
The plurality of advantages such as good stability, accuracy are high, high pressure resistant, sensitivity is high；The more important thing is, described PT100
Temperature sensor is according to IEC751 international standard manufacture, and is fixed by movable screw, therefore can realize
Plug and play so that temperature detecting operation is simple and convenient；
More specifically, described first temperature sensor and described second temperature sensor can use two-wire system
PT100 temperature sensor；
PT100, the platinum resistance thermometer sensor, in the most described PT100 temperature sensor.According to drawing of described PT100
The different connections of line circuit, PT100 temperature sensor can be divided into the temperature sensor of two-wire system PT100, three
Line PT100 temperature sensor and the temperature sensor of four-wire system PT100 etc.；Along with the increase of line,
The certainty of measurement of PT100 temperature sensor steps up, but accordingly, its wiring complexity the most progressively increases
Greatly, now the survey required by the present embodiment one has been met in view of described two-wire system PT100 temperature sensor
Accuracy of measurement and its mode of connection are the simplest, the therefore preferred described two-wire system PT100 temperature of the present embodiment one
Degree sensor.
4) about sampling A/D chip 400
Wherein, sampling A/D chip 400 includes duplexure sampling A/D chip and temperature sampling chip；
Existing duplexure sampling A/D chip includes single-phase electric energy computation chip and three-phase electrical energy computation chip
Deng.Compared to described single-phase electric energy computation chip, although described three-phase electrical energy computation chip has calculating more
For the easy and higher advantage of computational accuracy, but its production cost is the most of a relatively high and chip pin is more
It is unfavorable for PCB(Printed Circuit Board, printed circuit board) layout cabling, thus, from saving into
From the point of view of basis, simple in construction, application easy to spread, the preferred described single-phase electric energy meter of the present embodiment one
Amount chip is as described duplexure sampling A/D chip；
Described single-phase electric energy computation chip is equal with described current transformer quantity；Wherein, a described list
Phase electric energy computation chip is for carrying out the voltage of same phase line, the current analog signal of same duplexure
Synchronized sampling and calculating, obtain the digital quantity of the network load parameter of this phase line of this duplexure；
In actual applications, described single-phase electric energy computation chip and/or described temperature sampling chip are preferable
CS5463 chip；
Described CS5463 chip has the characteristics such as high performance-price ratio, low-power consumption, high sampling precision.Further, by
In described CS5463 chip internal including at least two-way analog digital conversion passage, therefore in the present embodiment one,
Connect respectively by would correspond to the voltage transformer summation current transformer of the same phase line of same duplexure
In the two-way analog digital conversion passage of described CS5463 chip, can realize simultaneously sampled voltage analogue signal and
The purpose of current analog signal, it is ensured that the voltage signal in the same phase line of same duplexure, electric current
The sampling instant of signal is identical, it is to avoid because some sampled value sampling delay causes the network load parameter to believe
Breath computing relay or mistake；Simultaneously by by described first temperature sensor and described second temperature sensor
It is connected to the two-way analog digital conversion passage of CS5463 chip, described running temperature simulation letter can be realized
Number and the synchronized sampling of described environment temperature simulation signal, thus ensure that running temperature and ambient temperature
Sampling instant is identical, it is to avoid because some temperature value sampling delay causes temperature rise value computing relay or mistake.
5) about microcontroller 500
Microcontroller 500 can use STM32F103 Series of MCU；
Described STM32F103 Series of MCU is first based on ARMv7-M architecture 32
Standard RISC(Reduced Instruction Set Computer, Reduced Instruction Set Computer) processor,
As the embedded ARM processor of latest generation, the performance of described STM32F103 Series of MCU
Index is far superior to 51 traditional series monolithics, but its application method but with 51 series monolithic
Machine is the easiest.Further, abundant Resources on Chip makes described STM32F103 Series of MCU be more easy to
Upgrade in from now on extension.
Distribution transformer is typically provided with 2-4 bar duplexure, the most again to be provided with 2 duplexure persons
Most commonly seen.Based on this, the present embodiment one is to have the distribution transformer of 2 duplexures as monitoring
Object, structure and function to described distributing transformer monitoring device are further described.Specific as follows:
2 duplexures the respectively first duplexure and second setting described distribution transformer branches back to
Road；The three phase line of known described distribution transformer is respectively A phase line, B phase line and C phase line,
Then seeing Fig. 2, described distributing transformer monitoring device includes:
Voltage detection unit, including: the first voltage transformer 100A of being respectively applied in A, B, C phase line,
Second voltage transformer 100B, tertiary voltage transformer 100C；
Current detecting unit, including: the first Current Mutual Inductance being applied in the A phase line of the first duplexure
Device 2001A, the second current transformer 2001B being applied in the B phase line of the first duplexure, application
The 3rd current transformer 2001C in the C phase line of the first duplexure；It is applied to the second duplexure
A phase line on the 4th current transformer 2002A, be applied in the B phase line of the second duplexure
Five current transformer 2002B, the 6th current transformer being applied in the C phase line of the second duplexure
2002C；
Duplexure sampling A/D chip, including: be applied in the A phase line of the first duplexure first is single-phase
Electric energy computation chip 3001A, the second single-phase electric energy metering being applied in the B phase line of the first duplexure
Chip 3001B, the 3rd single-phase electric energy computation chip being applied in the C phase line of the first duplexure
3001C；The 4th single-phase electric energy computation chip 3002A that is applied in the A phase line of the second duplexure, should
The 5th single-phase electric energy computation chip 3002B in the B phase line of the second duplexure, it is applied to second
The 6th single-phase electric energy computation chip 3002C in the C phase line of duplexure；
And obtain the first temperature sensor X of running temperature analogue signal, for measuring for measuring
The second temperature sensor Y, temperature sampling chip Z and microcontroller 500 to environment temperature simulation signal；
Wherein:
First single-phase electric energy computation chip 3001A receives the A that the first voltage transformer 100A collects respectively
The A phase of the first duplexure that the voltage analog signal of phase line and the first current transformer 2001A collect
The current analog signal of line, and it is carried out analog digital conversion and calculating, obtain the A phase of the first duplexure
The network load parameters number signal of line；
Second single-phase electric energy computation chip 3001B receives the B that the second voltage transformer 100B collects respectively
The B phase of the first duplexure that the voltage analog signal of phase line and the second current transformer 2001B collect
The current analog signal of line, and it is carried out analog digital conversion and calculating, obtain the B phase of the first duplexure
The network load parameters number signal of line；
3rd single-phase electric energy computation chip 3001C receives tertiary voltage transformer 100C respectively and collects C
The C phase of the first duplexure that the voltage analog signal of phase line and the 3rd current transformer 2001C collect
The current analog signal of line, and it is carried out analog digital conversion and calculating, obtain the C phase of the first duplexure
The network load parameters number signal of line；
4th single-phase electric energy computation chip 3002A receives the A that the first voltage transformer 100A collects respectively
The A phase of the second duplexure that the voltage analog signal of phase line and the 4th current transformer 2002A collect
The current analog signal of line, and it is carried out analog digital conversion and calculating, obtain the A phase of the second duplexure
The network load parameters number signal of line；
5th single-phase electric energy computation chip 3002B receives the B that the second voltage transformer 100B collects respectively
The B phase of the second duplexure that the voltage analog signal of phase line and the 5th current transformer 2002B collect
The current analog signal of line, and it is carried out analog digital conversion and calculating, obtain the B phase of the second duplexure
The network load parameters number signal of line；
6th single-phase electric energy computation chip 3002C receives the C that tertiary voltage transformer 100C collects respectively
The C phase of the second duplexure that the voltage analog signal of phase line and the 6th current transformer 2002C collect
The current analog signal of line, and it is carried out analog digital conversion and calculating, obtain the C phase of the second duplexure
The network load parameters number signal of line；
Temperature sampling chip Z receive respectively running temperature analogue signal that the first temperature sensor X records and
The environment temperature simulation signal that second temperature sensor Y records, and it is carried out analog digital conversion, obtain phase
The digital signal answered；
Thus, according to microcontroller 500 process obtain 2 duplexures three-phase (A phase, B phase and
C phase) network load parameter, the load condition obtaining either branch loop can be analyzed；Simultaneously according to micro-
Controller 500 processes actual motion temperature value and the real time environment temperature value of the distribution transformer obtained, i.e.
The temperature rise situation obtaining described distribution transformer can be analyzed.
Based on embodiment one, the embodiment of the present invention two discloses another distributing transformer monitoring device, with
Realize running temperature, temperature rise situation and the on-line monitoring of branch's sharing of load situation thereof to distribution transformer,
See Fig. 3, including: voltage detection unit 100, current detecting unit 200, temperature detecting unit 300,
Sampling A/D chip 400, microcontroller 500 and communication module 600.
Concrete, communication module 600 is connected between microcontroller 500 and distribution terminal, for by micro-
The result transmission of controller 500 to described distribution terminal, thus realize intelligence distribution transformer terminals deep
Change application；
Wherein, in view of isolated form RS485 communication module have that network is easy to connect, good in anti-interference performance,
The features such as long transmission distance, communication module 600 is preferably isolated type RS485 communication module, it is ensured that micro-control
Device 500 processed processes the accurate delivery of the actual electric network load parameter obtained.
Additionally, referring also to Fig. 3, the distributing transformer monitoring device that the embodiment of the present invention two provides may also include that
Memory module 700.
Memory module 700 is connected with microcontroller 500, is used for storing microcontroller 500 process and obtains
The actual electric network load parameter of each phase line, actual motion temperature value and the actual rings of each duplexure
Border temperature value.
For ensureing to store quickly and accurately, read described actual electric network load parameter, memory module 700
Preferably ferroelectric memory (FRAM)；FRAM utilizes ferroelectric effect to realize data storage, can be by ROM
The non-volatile data storage characteristic of (Read-Only Memory, read only memory) and RAM(random
Access memory, random access memory) the advantage knot such as unlimited read-write, high-speed read-write and low-power consumption
It is combined, compared to flash memory and EEPROM(Electrically Erasable
Programmable Read-Only Memory, EEPROM) etc. relatively in early days non-
Volatile memory, FRAM has higher writing speed and longer reading-writing life-span.
In the present embodiment two, microcontroller 500 carries out initial configuration to sampling A/D chip 400, and real
Time monitor its running status, chip 400 to be sampled samples, calculated after can point out microcontroller 500
Data to be read are ready for ready, and now microcontroller 500 reads sampling A/D chip 400 and processes the number obtained
Word signal is also changed accordingly, obtains corresponding actual value, and is stored in memory module 700
In；When needs communicate with distribution terminal, microcontroller 500 reads from memory module 700 accordingly
Data, are transmitted to distribution terminal by communication module 600.
Additionally, referring also to Fig. 3, the distributing transformer monitoring device that the embodiment of the present invention two provides may also include that
Indicating module 800.
Indicating module 800 is connected with microcontroller 500, is used for indicating described distributing transformer monitoring device
Operating condition.
Concrete, microcontroller 500 monitors sampling A/D chip 400, communication module 600, memory module in real time
The running status of 700 grades, and control indicating module 800 display monitoring result；: distribution transformer as described in when
When device monitoring device is properly functioning, microcontroller 500 controls the first signal lights of indicating module 800 and continues
Flicker；When described distributing transformer monitoring device breaks down or be out of service, control described first letter
Signal lamp extinguishes；When described distributing transformer monitoring device carries out communication with distribution terminal, microcontroller 500
The secondary signal lamp controlling indicating module 800 persistently flashes；When described communication process interrupts or communication failure
Time, control described secondary signal lamp and extinguish.Thus, can facilitate relevant staff understand in real time described in join
The operating condition of piezoelectric transformer monitoring device, and make respective handling in time.
It addition, any one distributing transformer monitoring device of the present invention, its power supply all can be preferential
Select linear power supply, to avoid the occurrence of harmonic wave interference, it is ensured that the accuracy of monitoring result.
In sum, the embodiment of the present invention embodiment of the present invention passes through sampling A/D chip to voltage, current detecting
The output signal of unit carries out integrated treatment, obtains the network load ginseng of each phase line of each duplexure
Number digital signal, processes the output signal of temperature detecting unit also by described sampling A/D chip simultaneously,
Obtain running temperature digital signal and ambient temperature digital signal；Finally read above-mentioned numeral by microcontroller
Signal, and it is converted into corresponding actual value.Wherein actual motion temperature value and actual environment temperature value
Difference be the temperature rise of described distribution transformer, thus, staff exports according to described microcontroller
Actual motion temperature value and actual environment temperature value, can realize the running temperature to distribution transformer and
The on-line monitoring of temperature rise situation；Meanwhile, staff is by each point of analysis described microcontroller output
The actual electric network load parameter of each phase line of Zhi Huilu, can be calculated each bar duplexure and hold respectively
The electric load carried, it is achieved thereby that the on-line monitoring of the branch's sharing of load situation to distribution transformer.
Based on this, staff is finding that distribution transformer exists the peaces such as running temperature transfinites, temperature rise is transfinited
When full hidden danger and/or the serious unbalanced phenomenon of branch's sharing of load, corresponding measure can be taked in time to institute
The operating condition stating distribution transformer regulates and controls, thus avoids described distribution transformer and burn because of excess temperature
Ruin and ensure that the safety and economic operation of described power distribution network.
In this specification, each embodiment uses the mode gone forward one by one to describe, and each embodiment stresses
Being the difference with other embodiments, between each embodiment, identical similar portion sees mutually.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses
The present invention.Multiple amendment to these embodiments will be aobvious and easy for those skilled in the art
Seeing, generic principles defined herein can be in the spirit or scope without departing from the embodiment of the present invention
In the case of, realize in other embodiments.Therefore, the embodiment of the present invention is not intended to be limited to institute herein
These embodiments shown, and it is to fit to consistent with principles disclosed herein and features of novelty the widest
Scope.
Claims (10)
1. a distributing transformer monitoring device, including voltage detection unit, current detecting unit and temperature
Detector unit, wherein, described voltage detection unit obtains the three-phase electricity pressing mold of distribution transformer for measuring
Intending signal, described temperature detecting unit is for measuring the running temperature simulation letter obtaining described distribution transformer
Number and the environment temperature simulation signal of local environment, it is characterised in that described current detecting unit is used for surveying
Measure the three-phase current analogue signal of each duplexure of described distribution transformer；
Described distributing transformer monitoring device also includes:
It is connected with described temperature detecting unit, described voltage detection unit and described current detecting unit respectively
Sampling A/D chip, for the analogue signal received is processed, obtain running temperature digital signal,
The network load parameters number signal of each phase line of ambient temperature digital signal and each duplexure；
Described network load parameter includes voltage, electric current, active power, reactive power, apparent energy and merit
Rate factor；
And the microcontroller being connected with described sampling A/D chip, to the digital signal read
Reason, obtains each phase line of actual motion temperature value, actual environment temperature value and each duplexure
Actual electric network load parameter.
Distributing transformer monitoring device the most according to claim 1, it is characterised in that described voltage
Detector unit includes:
First voltage transformer, for measuring the A phase voltage analogue signal obtaining described distribution transformer；
Second voltage transformer, for measuring the B phase voltage analogue signal obtaining described distribution transformer；
Tertiary voltage transformer, for measuring the C phase voltage analogue signal obtaining described distribution transformer.
Distributing transformer monitoring device the most according to claim 1, it is characterised in that described electric current
Detector unit includes: on the not isopen of the different duplexures being separately positioned on described distribution transformer
Current transformer.
Distributing transformer monitoring device the most according to claim 1, it is characterised in that described sampling
Chip includes duplexure sampling A/D chip and temperature sampling chip.
Distributing transformer monitoring device the most according to claim 4, it is characterised in that described branch
Loops sample chip and/or described temperature sampling chip include CS5463 chip.
Distributing transformer monitoring device the most according to claim 1, it is characterised in that described temperature
Detector unit includes PT100 temperature sensor；
Wherein, described PT100 temperature sensor includes the temperature sensor of two-wire system PT100.
Distributing transformer monitoring device the most according to claim 1, it is characterised in that described micro-control
Device processed includes STM32F103 Series of MCU.
Distributing transformer monitoring device the most according to any one of claim 1 to 7, its feature exists
In, also include: be connected to the communication module between described microcontroller and distribution terminal, for by described
Each phase line of actual motion temperature value, described actual environment temperature value and described each duplexure
The output of actual electric network load parameter is to described distribution terminal；Wherein,
Described communication module includes isolated form RS485 communication module.
Distributing transformer monitoring device the most according to any one of claim 1 to 7, its feature exists
In, also include: the memory module being connected with described microcontroller, be used for storing described actual motion temperature
The actual electric network of each phase line of angle value, described actual environment temperature value and described each duplexure is born
Lotus parameter；Wherein,
Described memory module includes ferroelectric memory FRAM.
Distributing transformer monitoring device the most according to any one of claim 1 to 7, its feature
It is, also includes: the indicating module being connected with described microcontroller；
Described indicating module is for indicating the operating condition of described distributing transformer monitoring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310755615.0A CN103713187B (en) | 2013-12-31 | 2013-12-31 | A kind of distributing transformer monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310755615.0A CN103713187B (en) | 2013-12-31 | 2013-12-31 | A kind of distributing transformer monitoring device |
Publications (2)
| Publication Number | Publication Date |
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| CN103713187A CN103713187A (en) | 2014-04-09 |
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| CN105372540A (en) * | 2015-12-21 | 2016-03-02 | 河海大学常州校区 | Performance on-line monitoring device for power distribution switch cabinet lightning arrester and monitoring method thereof |
| CN105375643A (en) * | 2015-12-21 | 2016-03-02 | 河海大学常州校区 | On-line monitoring device for power distribution transformer performance and monitoring method thereof |
| CN106443275A (en) * | 2016-10-28 | 2017-02-22 | 中国舰船研究设计中心 | Method and apparatus for monitoring low-voltage distribution transformer for ship |
| CN107884669A (en) * | 2017-12-28 | 2018-04-06 | 国网山东省电力公司高密市供电公司 | A kind of distribution transformer operating state monitoring system |
| CN109066731A (en) * | 2018-07-26 | 2018-12-21 | 广东电网有限责任公司佛山供电局 | Distribution net platform region three-phase load unbalance self-checking device |
| CN109827679B (en) * | 2019-03-11 | 2020-08-04 | 山东理工大学 | Distribution transformer winding temperature rise online monitoring system and online monitoring method |
| CN111999608B (en) * | 2020-07-27 | 2023-04-18 | 北京智芯微电子科技有限公司 | Monitoring method and monitoring system of distribution transformer and intelligent terminal |
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| JPS58113865A (en) * | 1981-12-28 | 1983-07-06 | Fuji Electric Co Ltd | Detecting device for dc voltage |
| CN201234165Y (en) * | 2008-06-06 | 2009-05-06 | 陈家斌 | Automatic control apparatus for power distribution system |
| CN203084118U (en) * | 2013-01-08 | 2013-07-24 | 武汉汉镇既济电力设备有限公司 | Monitoring equipment |
| CN203084116U (en) * | 2013-01-08 | 2013-07-24 | 武汉汉镇既济电力设备有限公司 | Monitoring device suitable for power distribution system |
| CN103399241B (en) * | 2013-08-15 | 2016-01-20 | 南京新联电子股份有限公司 | Based on substation transformer fault diagnosis system and the method for temperature rise and load relation |
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