CN207882332U - system for detecting transformer iron core grounding current - Google Patents
system for detecting transformer iron core grounding current Download PDFInfo
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- CN207882332U CN207882332U CN201820341884.0U CN201820341884U CN207882332U CN 207882332 U CN207882332 U CN 207882332U CN 201820341884 U CN201820341884 U CN 201820341884U CN 207882332 U CN207882332 U CN 207882332U
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 121
- 238000004891 communication Methods 0.000 claims abstract description 54
- 238000012545 processing Methods 0.000 claims description 21
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 5
- 238000011156 evaluation Methods 0.000 abstract description 20
- 238000009413 insulation Methods 0.000 abstract description 11
- 238000003745 diagnosis Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 description 12
- 230000008859 change Effects 0.000 description 9
- 230000005611 electricity Effects 0.000 description 6
- 230000005684 electric field Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000003449 preventive effect Effects 0.000 description 5
- 238000004804 winding Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000000844 transformation Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- QHGVXILFMXYDRS-UHFFFAOYSA-N pyraclofos Chemical compound C1=C(OP(=O)(OCC)SCCC)C=NN1C1=CC=C(Cl)C=C1 QHGVXILFMXYDRS-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Abstract
The utility model discloses the systems for detecting transformer iron core grounding current, by the first current acquisition fixing end on A phase transformer iron core groundings, the second current acquisition fixing end on B phase transformer iron core groundings, third current acquisition fixing end on C phase transformer iron core groundings, it is connected by RS232 serial ports with substation's Energy Management System, obtain the voltage collector for being tested transformer same-phase low-pressure side phase voltage information, it is formed with mounted on the indoor data acquisition display end of Substation control, it is connected by 5GHz wireless communication networks between five and carries out data communication, operational management personnel are by checking that display content realizes transformer insulation state evaluation.The utility model helps to understand the real-time measured value of single phase power transformer iron core grounding current and the step down side operation real-time measured value of phase voltage in AC network, and the variation tendency of the two, and simply with installation, the advantages that state evaluation is convenient, and fault diagnosis is accurate.
Description
Technical field
The utility model is related to electric power project engineering fields, and in particular to be for detect transformer iron core grounding current
System is used for the evaluation of electric power transformer insulated operating status.
Background technology
In AC network power supply, transformer is one of critical piece of operation of power networks, and transformer iron core grounding current
It is the important indicator for characterizing its apparatus insulated performance, in power grid, the power transformer of 750kV and above is three
Platform single-phase transformer, by wiring, connects into a three-phase transformer, also there is the power transformer of specific demand in substation field
Device uses above-mentioned form, and 500kV and the power transformer of following level are mostly three-phase integrated form, general multiple voltage class
The transformer of output, for low pressure winding close to iron core winding, electrical transformer cores are the metal silicon steel sheet devices of electromagnetic conversion,
Reliable one point earth, national standard DL/T596 are needed in operation《Power equipment preventive trial regulation》Specified in fault critical
Value：" running transformer iron core grounding current cannot be more than 0.1A ".Reason one is：Power transformer is in normal operation
When, the winding periphery being wound on iron core will produce electric field, and transformer core is in electric field, and the power of electric field directly affects
The size of transformer iron core grounding current, reason the second is：It, then can be in iron core since certain failures result in multipoint earthing
The closed circuit for forming short circuit, will produce circulation on transformer core grounding line so that transformer iron core grounding current increases.
There are live detection and on-line monitoring two ways for transformer iron core grounding current detection at present, is only to transformer core
Earth current value is detected, and evaluates transformer insulation state according to measured value size, but due to the transformer core of normal operation
The size of earth current and the power of inside transformer electric field have a direct relation, and the power of inside transformer electric field and operation
Voltage is related, national standard GB12325《Power quality-admissible deviation of supply volt- age》Middle regulation：" when power grid normal operation, 35kV and
The sum of above positive and negative absolute value of the bias of supply voltage must not exceed 10%, 20kV of nominal voltage and following supply voltage deviation
It is ± the 7% " of nominal voltage, in view of the actual conditions in operation of power networks, is charged using existing transformer iron core grounding current
When detection or on-line monitoring, measured value stability and less reproducible often measures in one day different periods with equipment, occurs multiple
Different measured values, sometimes more than national regulations fault critical, sometimes less than fault critical so that equipment O＆M, detection people
Member, it is difficult to accurately, intuitively carry out fault diagnosis using measured value.
Utility model content
The purpose of this utility model is to provide the systems for detecting transformer iron core grounding current, are suitable for alternating current
Single phase power transformer iron core grounding current on-line monitoring and state of insulation evaluation, solve due to transformer station high-voltage side bus voltage in net
Fluctuation and variation, cause iron core grounding current on-Line Monitor Device to measure stability and less reproducible, influence transformer insulated
The problem of state evaluation.
In order to achieve the above objectives, the utility model adopts the following technical solution：
System for detecting transformer iron core grounding current, including be mounted on A phase transformer iron core groundings and detect electricity
First current acquisition fixing end of flow data, the second electric current that current data is detected on B phase transformer iron core groundings are adopted
Collection fixing end, the third current acquisition fixing end that current data is detected on C phase transformer iron core groundings, further include and become
Power station Energy Management System is connected by RS232 serial ports, the electricity of the phase voltage information for obtaining tested transformer same-phase
It presses collector, and display end is acquired mounted on the indoor data of Substation control, the first current acquisition fixing end, the
Two current acquisition fixing ends, third current acquisition fixing end, voltage collector and data acquisition display end pass through 5GHz channel radios
Interrogate the connected progress data communication of network.
Further, the first current acquisition fixing end includes being mounted on A phase transformer iron core ground wires to be used to obtain A phases
The first power current mutual inductor of current signal, the output end of the first power current mutual inductor are connected in transformer core ground wire
Current signal is converted to the first data processing unit of digital signal, the output end of the first data processing unit passes through RS232
Serial communication mode is connected with the first wireless telecommunications transmitter, and the output end of the first wireless telecommunications transmitter passes through wireless telecommunications side
Formula is connected to data acquisition display end.
Further, the second current acquisition fixing end includes being mounted on B phase transformer iron core ground wires to be used to obtain B phases
The second power current mutual inductor of current signal, the output end of the second power current mutual inductor are connected in transformer core ground wire
Current signal is converted to the second data processing unit of digital signal, the output end of the second data processing unit passes through RS232
Serial communication mode is connected with the second wireless telecommunications transmitter, and the output end of the second wireless telecommunications transmitter passes through wireless telecommunications side
Formula is connected to data acquisition display end.
Further, third current acquisition fixing end includes being mounted on C phase transformer iron core ground wires to be used to obtain C phases
The third power current mutual inductor of current signal, the output end of third power current mutual inductor are connected in transformer core ground wire
Current signal is converted to the third data processing unit of digital signal, the output end of third data processing unit passes through RS232
Serial communication mode is connected with third wireless telecommunications transmitter, and the output end of third wireless telecommunications transmitter passes through wireless telecommunications side
Formula is connected to data acquisition display end.
Further, voltage collector include for by substation's Energy Management System network information format conversion at data
Acquire the protocol converter of data communication format needed for display end, input terminal and the substation's Energy Management System of protocol converter
Output end is connected by RS232 serial communication modes, and the output end of protocol converter is connected with by RS232 serial communication modes
4th wireless telecommunications transmitter, the output end of the 4th wireless telecommunications transmitter are connected to data acquisition by wireless communication mode and show
Show end.
Further, data acquisition display end includes computer and wireless communication receiver, wireless communication receiver it is defeated
Outlet is connected to the input terminal of computer, and the output end of wireless communication receiver and the input terminal of computer are that RS232 connects
Mouthful.
Compared with prior art, the utility model has technique effect beneficial below：
The first current acquisition fixing end of the utility model, the second current acquisition fixing end, third current acquisition fixing end,
It is connected by 5GHz wireless communication networks between voltage collector and data acquisition display end, carries out data communication, operational management
Personnel realize transformer insulation state evaluation, help to understand single phase power transformer iron in power grid by checking display content
The real-time measured value of core earth current and the variation tendency of the real-time measured value of step down side operation phase voltage and the two compare, special
Business equipment O＆M, testing staff Shi Yongyu not powered to transformer insulation state development fault diagnosis and evaluation of running status work
Make, there is the advantages that installation is simple, and state evaluation is convenient, and fault diagnosis is accurate.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Wherein：1, the first current acquisition fixing end；2, the second current acquisition fixing end；3, third current acquisition fixing end；
4, voltage collector；5, data acquire display end.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings：
Referring to Fig. 1, the system for detecting transformer iron core grounding current, by being mounted on A phase transformer iron core groundings
The first current acquisition fixing end 1, the second current acquisition fixing end 2 on B phase transformer iron core groundings, be mounted on C
Third current acquisition fixing end 3 on phase transformer iron core grounding, and pass through RS232 serial ports with substation's Energy Management System
It is connected, obtains the voltage collector 4 for being tested transformer same-phase low-pressure side phase voltage information, and in Substation control room
Data acquisition display end 5 form, be connected by 5GHz wireless communication networks between five, carry out data communication, operational management
Personnel realize transformer insulation state evaluation by checking display content.The utility model helps to understand single in AC network
The real-time measured value of phase power transformer iron core grounding current and the step down side real-time measured value of operation phase voltage and the two
Variation tendency, and there is the advantages that installation is simple, and state evaluation is convenient, and fault diagnosis is accurate.
The data that wherein data acquisition display end 5 is shown are, monitored：A phase transformers, B phase transformers, C phase-change pressures
Each iron core grounding current value of device；A phase transformers, B phase transformers, C phase transformers, the operation phase voltage value of same-phase low-pressure side,
The operation phase voltage value of low-pressure side and the voltage variety percentage of low-pressure side nominal voltage, tested transformer iron core grounding current
Monitor value and A phase transformers, B phase transformers, the C phase transformers each iron core grounding current values in the nominal phase voltage of low-pressure side
Current change quantity percentage, O＆M detect professional or substation operation administrative staff, by checking that data acquire display end
Display content, be changed trend analysis, realize to transformer insulation state appraisal.
For detecting the system of transformer iron core grounding current to Transformer Condition Monitoring in Guangzhou Power and evaluation of running status side
The step of method, is as follows：
A phase transformers, B phase transformers, C phase transformers when phase voltage nominal based on tested each single-phase transformer low-pressure side
Each iron core grounding current value acquires display end, by coding ground in the data of the system for detecting transformer iron core grounding current
Location is set；
Based on A phase transformer iron core groundings detect current data the first current acquisition fixing end, be mounted on B
The second current acquisition fixing end of current data is detected on phase transformer iron core grounding, is mounted on C phase transformer iron core groundings
The third current acquisition fixing end of current data is detected, obtains and is tested transformer iron core grounding current real time information, and by the electricity
Real time information is flowed by 5G wireless communication modes, uploads to 5G wireless communication networks, is equipped with ground on demand in the data of upload
Location encodes, and corresponding with setting address coding on data acquisition display end；
Based on substation's Energy Management System is obtained, it is tested the electricity of each single-phase transformer same-phase low-pressure side phase voltage information
Collector is pressed, gets high accuracy phase voltage real time information, and by the voltage real time information by 5G wireless communication modes, on
Pass to 5G wireless communication networks；It is equipped with address coding on demand in the data of upload, and is set on data acquisition display end
Address coding corresponds to；
Based on display end is acquired mounted on the indoor data of Substation control, by receiving on 5G networks, become for tested
Depressor iron core grounding current, same-phase low-pressure side phase voltage real time information, are associated, and tested monitoring in real time is calculated and displayed
A phase transformers, B phase transformers, each iron core grounding current value of C phase transformers；A phase transformers, B phase transformers, C phase-change pressures
The operation phase voltage value of device, same-phase low-pressure side, the voltage change of the operation phase voltage value and low-pressure side nominal voltage of low-pressure side
Measure percentage, tested transformer iron core grounding current monitor value and the A phase transformers in the nominal phase voltage of low-pressure side, B phase transformations
The current change quantity percentage of each iron core grounding current value of depressor, C phase transformers；
State evaluation one：Based on DL/T596《Power equipment preventive trial regulation》Specified in transformer core grounding
Current failure critical value, and for detect transformer iron core grounding current system tested transformer iron core grounding current monitoring
Value, evaluates transformer insulation state, as transformer iron core grounding current monitor value is less than transformer iron core grounding current
Fault critical, and the operation phase voltage value of tested transformer same-phase low-pressure side is greater than or equal to the nominal phase voltage of low-pressure side
Value, is determined as that transformer iron core grounding current is normal.
State evaluation two：Based on DL/T596《Power equipment preventive trial regulation》Specified in transformer core grounding
Current failure critical value, and for detect transformer iron core grounding current system tested transformer iron core grounding current monitoring
Value, evaluates transformer insulation state, as transformer iron core grounding current monitor value is more than transformer iron core grounding current
10% or more of fault critical, and the operation phase voltage value of tested transformer same-phase low-pressure side is less than or equal to low pressure
The nominal phase voltage value in side is determined as transformer iron core grounding current exception.
State evaluation three：As transformer iron core grounding current monitor value is more than transformer iron core grounding current fault critical
10% range in, be tested transformer iron core grounding current monitor value and tested transformer fe in the nominal phase voltage of low-pressure side
The current change quantity percentage of core earth current value；It is nominally electric with the operation phase voltage value and low-pressure side of tested step down side
The voltage variety percentage of pressure, variation tendency is consistent, is determined as that transformer iron core grounding current is normal.
State evaluation four：As transformer iron core grounding current monitor value is more than transformer iron core grounding current fault critical
10% range in, be tested transformer iron core grounding current monitor value and tested transformer fe in the nominal phase voltage of low-pressure side
The current change quantity percentage of core earth current value；It is nominally electric with the operation phase voltage value and low-pressure side of tested step down side
The voltage variety percentage of pressure, variation tendency is on the contrary, be determined as transformer iron core grounding current exception.
The utility model embodiment operating process is described in detail below：
System for detecting transformer iron core grounding current detects electric current by being mounted on A phase transformer iron core groundings
First current acquisition fixing end 1 of data, the second current acquisition that current data is detected on B phase transformer iron core groundings
Fixing end 2, the third current acquisition fixing end 3 that current data is detected on C phase transformer iron core groundings, and and substation
Energy Management System is connected by RS232 serial ports, obtains the voltage collector for the phase voltage information for being tested transformer same-phase
4, and formed mounted on the indoor data acquisition display end 5 of Substation control, pass through 5GHz wireless communication networks phases between five
Even, data communication is carried out.
Wherein：First current acquisition fixing end 1, including the first power current mutual inductor CT, mounted on transformer core
On line, iron core ground wire passes through primary and first data processing list of the power current transformer iron core as power current mutual inductor
The signal input part of member, the first data processing unit is connected to the first secondary output end of power current mutual inductor with cable, obtains A
Current signal in phase transformer iron core ground wire, the first data processing unit is by measures conversion module and industrial singlechip group at logical
After crossing the AC signal and direct current signal conversion that the first power current transformer measurement arrives, then through the conversion of the first digital signal, obtain
To digital signal, and by digital signal output end, the first wireless telecommunications of 5GHz frequency ranges are connected by RS232 serial communication modes
The input terminal of transmitter, the first wireless telecommunications transmitter of 5GHz frequency ranges, by wireless communication mode, the electric current number that will be acquired
Display end 5 is acquired according to data are uploaded to；
Wherein the second current acquisition fixing end 2, including the second power current mutual inductor CT are mounted on transformer core ground wire
On, iron core ground wire passes through primary and second data processing unit of the power current transformer iron core as power current mutual inductor,
The signal input part of second data processing unit is connected to the second secondary output end of power current mutual inductor with cable, obtains B phases
Current signal in transformer core ground wire, the second data processing unit is by measures conversion module and industrial singlechip group at passing through
After the AC signal that second power current transformer measurement arrives is converted with direct current signal, then through the conversion of the second digital signal, obtain
Digital signal, and by digital signal output end, the second wireless telecommunications that 5GHz frequency ranges are connected by RS232 serial communication modes are sent out
Send the input terminal of device, the second wireless telecommunications transmitter of 5GHz frequency ranges, by wireless communication mode, the current data that will be acquired
It is uploaded to data acquisition display end 5；
Wherein third current acquisition fixing end 3, including third power current mutual inductor CT are mounted on transformer core ground wire
On, iron core ground wire passes through primary and third data processing unit of the power current transformer iron core as power current mutual inductor,
The signal input part of third data processing unit is connected to the secondary output end of power current mutual inductor with cable, obtains transformer fe
Current signal in core ground wire, third data processing unit is by measures conversion module and industrial singlechip group at passing through third power frequency
AC signal that current transformer measures then is converted through digital signal with after direct current signal conversion, obtains digital signal, and will
Digital signal output end connects the input terminal of the third wireless telecommunications transmitter of 5GHz frequency ranges by RS232 serial communication modes,
The current data acquired is uploaded to data and is adopted by the third wireless telecommunications transmitter of 5GHz frequency ranges by wireless communication mode
Collect display end 5；
Wherein：Voltage collector 4, including a protocol converter are used for substation's Energy Management System network information
Format is converted into data communication format needed for data acquisition display end 5, input terminal and the substation's energy management of protocol converter
System output is connected by RS232 serial communication modes, the output end of protocol converter and the 4th channel radio of 5GHz frequency ranges
It interrogates transmitter input terminal by RS232 serial communication modes to be connected, the 4th wireless telecommunications transmitter of 5GHz frequency ranges, by acquisition
The low-pressure side phase voltage information of tested transformer same-phase is uploaded to data acquisition display end 5；
Wherein：Data acquire display end 5, include the wireless communication receiver of a computer and a 5GHz frequency range, nothing
The output of line communication receiver is RS232 interface, by line, is connected to the input terminal of computer RS232 interface, computer is real
The existing tested transformer core ground line current information acquired, and the phase voltage information with tested transformer same-phase, and carry out
Association；It is evaluated by the fault critical of national regulations and various online monitoring datas stores.
Wherein the first current acquisition fixing end 1, the second current acquisition fixing end 2, third current acquisition fixing end 3, voltage
Collector 4, data acquire display end 5, using 5G wireless network connections, in the first current acquisition fixing end 1, the second current acquisition
Fixing end 2, third current acquisition fixing end 3, voltage collector 4 upload data on demand be equipped with address coding, and with number
It is corresponded to according to setting address coding on acquisition display end 5.
The wireless communication receiver of the wireless telecommunications transmitter and 5GHz frequency ranges of 5GHz frequency ranges, on sale on the market, stipulations turn
Parallel operation, it is on sale on the market.
System for detecting transformer iron core grounding current, to Transformer Condition Monitoring in Guangzhou Power and evaluation of running status side
The step of method, is as follows：
A phase transformers, B phase transformers, C phase transformers when phase voltage nominal based on tested each single-phase transformer low-pressure side
Each iron core grounding current value acquires display end, by coding ground in the data of the system for detecting transformer iron core grounding current
Location is set；
Based on A phase transformer iron core groundings detect current data the first current acquisition fixing end, be mounted on B
The second current acquisition fixing end of current data is detected on phase transformer iron core grounding, is mounted on C phase transformer iron core groundings
The third current acquisition fixing end of current data is detected, obtains and is tested transformer iron core grounding current real time information, and by the electricity
Real time information is flowed by 5G wireless communication modes, uploads to 5G wireless communication networks, is equipped with ground on demand in the data of upload
Location encodes, and corresponding with setting address coding on data acquisition display end；
Based on substation's Energy Management System is obtained, it is tested the electricity of each single-phase transformer same-phase low-pressure side phase voltage information
Collector is pressed, gets high accuracy phase voltage real time information, and by the voltage real time information by 5G wireless communication modes, on
Pass to 5G wireless communication networks；It is equipped with address coding on demand in the data of upload, and is set on data acquisition display end
Address coding corresponds to；
Based on display end is acquired mounted on the indoor data of Substation control, by receiving on 5G networks, become for tested
Depressor iron core grounding current, same-phase low-pressure side phase voltage real time information, are associated, and tested monitoring in real time is calculated and displayed
A phase transformers, B phase transformers, each iron core grounding current value of C phase transformers；A phase transformers, B phase transformers, C phase-change pressures
The operation phase voltage value of device, same-phase low-pressure side, the voltage change of the operation phase voltage value and low-pressure side nominal voltage of low-pressure side
Measure percentage, tested transformer iron core grounding current monitor value and the A phase transformers in the nominal phase voltage of low-pressure side, B phase transformations
The current change quantity percentage of each iron core grounding current value of depressor, C phase transformers；
State evaluation one：Based on DL/T596《Power equipment preventive trial regulation》Specified in transformer core grounding
Current failure critical value, and for detect transformer iron core grounding current system tested transformer iron core grounding current monitoring
Value, evaluates transformer insulation state, as transformer iron core grounding current monitor value is less than transformer iron core grounding current
Fault critical, and the operation phase voltage value of tested transformer same-phase low-pressure side is greater than or equal to the nominal phase voltage of low-pressure side
Value, is determined as that transformer iron core grounding current is normal.
State evaluation two：Based on DL/T596《Power equipment preventive trial regulation》Specified in transformer core grounding
Current failure critical value, and for detect transformer iron core grounding current system tested transformer iron core grounding current monitoring
Value, evaluates transformer insulation state, as transformer iron core grounding current monitor value is more than transformer iron core grounding current
10% or more of fault critical, and the operation phase voltage value of tested transformer same-phase low-pressure side is less than or equal to low pressure
The nominal phase voltage value in side is determined as transformer iron core grounding current exception.
State evaluation three：As transformer iron core grounding current monitor value is more than transformer iron core grounding current fault critical
10% range in, be tested transformer iron core grounding current monitor value and tested transformer fe in the nominal phase voltage of low-pressure side
The current change quantity percentage of core earth current value；It is nominally electric with the operation phase voltage value and low-pressure side of tested step down side
The voltage variety percentage of pressure, variation tendency is consistent, is determined as that transformer iron core grounding current is normal.
State evaluation four：As transformer iron core grounding current monitor value is more than transformer iron core grounding current fault critical
10% range in, be tested transformer iron core grounding current monitor value and tested transformer fe in the nominal phase voltage of low-pressure side
The current change quantity percentage of core earth current value；It is nominally electric with the operation phase voltage value and low-pressure side of tested step down side
The voltage variety percentage of pressure, variation tendency is on the contrary, be determined as transformer iron core grounding current exception.
The above is the preferred implementation method of the utility model, it is noted that for the ordinary skill of this field
For personnel, without departing from the concept of the premise utility, various modifications and improvements can be made.
Claims (6)
1. the system for detecting transformer iron core grounding current, which is characterized in that including being mounted on A phase transformer iron core groundings
First current acquisition fixing end (1) of upper detection current data detects current data on B phase transformer iron core groundings
Second current acquisition fixing end (2), the third current acquisition that current data is detected on C phase transformer iron core groundings are fixed
It holds (3), further includes being connected by RS232 serial ports with substation's Energy Management System, for obtaining tested transformer same-phase
Phase voltage information voltage collector (4), it is described and mounted on Substation control indoor data acquisition display end (5)
The first current acquisition fixing end (1), the second current acquisition fixing end (2), third current acquisition fixing end (3), voltage acquisition
Device (4), which is connected with data acquisition display end (5) by 5GHz wireless communication networks, carries out data communication.
2. the system according to claim 1 for detecting transformer iron core grounding current, which is characterized in that the first electric current
Acquisition fixing end (1) includes being mounted on believing for obtaining electric current in A phase transformer iron core ground wires on A phase transformer iron core ground wires
Number the first power current mutual inductor, the output end of the first power current mutual inductor is connected with is converted to digital letter by current signal
Number the first data processing unit, the output end of the first data processing unit is connected with first by RS232 serial communication modes
Wireless telecommunications transmitter, the output end of the first wireless telecommunications transmitter are connected to data by wireless communication mode and acquire display end
(5)。
3. the system according to claim 1 for detecting transformer iron core grounding current, which is characterized in that the second electric current
Acquisition fixing end (2) includes being mounted on believing for obtaining electric current in B phase transformer iron core ground wires on B phase transformer iron core ground wires
Number the second power current mutual inductor, the output end of the second power current mutual inductor is connected with is converted to digital letter by current signal
Number the second data processing unit, the output end of the second data processing unit is connected with second by RS232 serial communication modes
Wireless telecommunications transmitter, the output end of the second wireless telecommunications transmitter are connected to data by wireless communication mode and acquire display end
(5)。
4. the system according to claim 1 for detecting transformer iron core grounding current, which is characterized in that third electric current
Acquisition fixing end (3) includes being mounted on believing for obtaining electric current in C phase transformer iron core ground wires on C phase transformer iron core ground wires
Number third power current mutual inductor, the output end of third power current mutual inductor is connected with is converted to digital letter by current signal
Number third data processing unit, the output end of third data processing unit is connected with third by RS232 serial communication modes
Wireless telecommunications transmitter, the output end of third wireless telecommunications transmitter are connected to data by wireless communication mode and acquire display end
(5)。
5. the system according to claim 1 for detecting transformer iron core grounding current, which is characterized in that voltage acquisition
Device (4) includes for substation's Energy Management System network information format conversion to be acquired data needed for display end (5) at data
The protocol converter of communication format, the input terminal of protocol converter are gone here and there with substation Energy Management System output end by RS232
Row communication modes are connected, and the output end of protocol converter is connected with the 4th wireless telecommunications by RS232 serial communication modes and sends
Device, the output end of the 4th wireless telecommunications transmitter are connected to data by wireless communication mode and acquire display end (5).
6. the system according to claim 1 for detecting transformer iron core grounding current, which is characterized in that data acquire
Display end (5) includes computer and wireless communication receiver, and the output end of wireless communication receiver is connected to the input of computer
End, and the output end of wireless communication receiver and the input terminal of computer are RS232 interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820341884.0U CN207882332U (en) | 2018-03-13 | 2018-03-13 | system for detecting transformer iron core grounding current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820341884.0U CN207882332U (en) | 2018-03-13 | 2018-03-13 | system for detecting transformer iron core grounding current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207882332U true CN207882332U (en) | 2018-09-18 |
Family
ID=63496837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820341884.0U Active CN207882332U (en) | 2018-03-13 | 2018-03-13 | system for detecting transformer iron core grounding current |
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| Country | Link |
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| CN (1) | CN207882332U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318732A (en) * | 2018-03-13 | 2018-07-24 | 国家电网公司 | A kind of transformer iron core grounding current on-Line Monitor Device and method |
-
2018
- 2018-03-13 CN CN201820341884.0U patent/CN207882332U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108318732A (en) * | 2018-03-13 | 2018-07-24 | 国家电网公司 | A kind of transformer iron core grounding current on-Line Monitor Device and method |
| CN108318732B (en) * | 2018-03-13 | 2024-01-23 | 国家电网公司 | On-line monitoring device and method for grounding current of transformer core |
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