CN108318732A - A kind of transformer iron core grounding current on-Line Monitor Device and method - Google Patents
A kind of transformer iron core grounding current on-Line Monitor Device and method Download PDFInfo
- Publication number
- CN108318732A CN108318732A CN201810206311.1A CN201810206311A CN108318732A CN 108318732 A CN108318732 A CN 108318732A CN 201810206311 A CN201810206311 A CN 201810206311A CN 108318732 A CN108318732 A CN 108318732A
- Authority
- CN
- China
- Prior art keywords
- current
- phase
- iron core
- transformer
- transformer iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 128
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000004891 communication Methods 0.000 claims abstract description 63
- 238000012545 processing Methods 0.000 claims description 21
- 230000005611 electricity Effects 0.000 claims description 16
- 230000008859 change Effects 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 10
- 230000009466 transformation Effects 0.000 claims description 4
- 238000000844 transformation Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims 1
- 238000011156 evaluation Methods 0.000 abstract description 19
- 238000009413 insulation Methods 0.000 abstract description 12
- 238000003745 diagnosis Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 3
- 230000005684 electric field Effects 0.000 description 5
- 230000003449 preventive effect Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 238000005259 measurement 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
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 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
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a kind of transformer iron core grounding current on-Line Monitor Device and methods, 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 advantages that present invention helps to understand the variation tendency of the real-time measured value of single phase power transformer iron core grounding current and the real-time measured value of step down side operation phase voltage and the two in AC network, and simple with installation, and state evaluation is convenient, and fault diagnosis is accurate.
Description
Technical field
The present invention relates to electric power project engineering fields, and in particular to a kind of transformer iron core grounding current on-Line Monitor Device
And method, it 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.
Invention content
The purpose of the present invention is to provide a kind of transformer iron core grounding current on-Line Monitor Device and method, it is suitable for handing over
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 electricity in galvanic electricity net
The fluctuation and variation of pressure cause iron core grounding current on-Line Monitor Device to measure stability and less reproducible, influence transformer
The problem of state of insulation is evaluated.
In order to achieve the above objectives, the present invention adopts the following technical scheme that：
A kind of transformer iron core grounding current on-Line Monitor Device, including be mounted on A phase transformer iron core groundings and detect
First current acquisition fixing end of current data, the second electric current that current data is detected on B phase transformer iron core groundings
Acquire fixing end, on C phase transformer iron core groundings detect current data third current acquisition fixing end, further include with
Substation's Energy Management System is connected by RS232 serial ports, the phase voltage information for obtaining tested transformer same-phase
Voltage collector, and it is mounted on the indoor data acquisition display end of Substation control, the first current acquisition fixing end,
Second current acquisition fixing end, third current acquisition fixing end, voltage collector and data acquisition display end are wireless by 5GHz
Communication network, which is connected, carries out data communication.
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.
A kind of transformer iron core grounding current on-line monitoring method, includes the following steps：
Step 1：A phase transformers, B phase transformers when phase voltage nominal based on tested each single-phase transformer low-pressure side, C
Each iron core grounding current value of phase transformer is set in data acquisition display end by coded address；
Step 2：Utilize the first current acquisition fixing end, the second current acquisition fixing end and third current acquisition fixing end
It obtains and is tested transformer iron core grounding current real time information, and the electric current real time information is uploaded by 5G wireless communication modes
To 5G wireless communication networks, it is equipped with address coding on demand in the data of upload, and set ground on data acquisition display end
Location coding corresponds to；
Step 3：Get phase voltage real time information using voltage collector, and by the voltage real time information by 5G without
Line communication modes upload to 5G wireless communication networks；It is equipped with address coding on demand in the data of upload, and is acquired with data
Setting address coding corresponds on display end；
Step 4：Display end is acquired using data, and transformer iron core grounding current, same phase are tested on 5G networks by receiving
Position low-pressure side phase voltage real time information is associated, be calculated and displayed the tested A phase transformers monitored in real time, B phase transformers,
Each iron core grounding current value of C phase transformers；A phase transformers, B phase transformers, the operation of C phase transformer same-phase low-pressure sides are mutually electric
Pressure value, the operation phase voltage value of low-pressure side connect with the voltage variety percentage of low-pressure side nominal voltage, tested transformer core
Earth-current monitor value and each iron core grounding electricity of A phase transformers, B phase transformers, C phase transformers in the nominal phase voltage of low-pressure side
The current change quantity percentage of flow valuve.
Compared with prior art, the present invention has technique effect beneficial below：
The first current acquisition fixing end of the present invention, the second current acquisition fixing end, third current acquisition fixing end, voltage
It is connected by 5GHz wireless communication networks between collector and data acquisition display end, progress data communication, operational management personnel,
By checking display content, realizes transformer insulation state evaluation, help to understand single phase power transformer iron core in power grid and connect
The real-time measured value of earth-current and the variation tendency of the real-time measured value of step down side operation phase voltage and the two compare, especially suitable
For power supply enterprise's equipment O＆M, testing staff carries out fault diagnosis to transformer insulation state and evaluation of running status works,
Simply with installation, the advantages that state evaluation is convenient, and fault diagnosis is accurate.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention.
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
Present invention is further described in detail below in conjunction with the accompanying drawings：
Referring to Fig. 1, a kind of transformer iron core grounding current on-Line Monitor Device, by being mounted on A phase transformer iron core groundings
On the first current acquisition fixing end 1, the second current acquisition fixing end 2 on B phase transformer iron core groundings, be mounted on
Third current acquisition fixing end 3 on C phase transformer iron core groundings, and it is serial by RS232 with substation Energy Management System
Mouth is connected, obtains the voltage collector 4 for being tested transformer same-phase low-pressure side phase voltage information, and is mounted on Substation control room
Interior data acquisition display end 5 forms, and is connected by 5GHz wireless communication networks between five, carries out data communication, operation pipe
Reason personnel realize transformer insulation state evaluation by checking display content.The present invention helps to understand single-phase in AC network
The change of the real-time measured value of power transformer iron core grounding current and the real-time measured value of step down side operation phase voltage and the two
Change trend, 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.
A kind of transformer iron core grounding current on-Line Monitor Device is to Transformer Condition Monitoring in Guangzhou Power and evaluation of running status
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 in a kind of data of transformer iron core grounding current on-Line Monitor Device
Address 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
The tested transformer iron core grounding current of current failure critical value and a kind of transformer iron core grounding current on-Line Monitor Device is supervised
Measured value evaluates transformer insulation state, as transformer iron core grounding current monitor value is less than transformer core grounding electricity
Fault critical is flowed, 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
The tested transformer iron core grounding current of current failure critical value and a kind of transformer iron core grounding current on-Line Monitor Device is supervised
Measured value evaluates transformer insulation state, as transformer iron core grounding current monitor value is more than transformer core grounding electricity
10% or more of fault critical is flowed, and the operation phase voltage value of tested transformer same-phase low-pressure side is less than or equal to low
The nominal phase voltage value in side is pressed, 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.
Operating process of the embodiment of the present invention is described in detail below：
A kind of transformer iron core grounding current on-Line Monitor Device detects electricity by being mounted on A phase transformer iron core groundings
First current acquisition fixing end 1 of flow data, the second electric current that current data is detected on B phase transformer iron core groundings are adopted
Collection fixing end 2, the third current acquisition fixing end 3 that current data is detected on C phase transformer iron core groundings, and and power transformation
Energy Management System of standing is connected by RS232 serial ports, obtains the voltage acquisition for the phase voltage information for being tested transformer same-phase
Device 4, and formed mounted on the indoor data acquisition display end 5 of Substation control, pass through 5GHz wireless communication networks between five
It is connected, carries out data communication.
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.
A kind of transformer iron core grounding current on-Line Monitor Device, to Transformer Condition Monitoring in Guangzhou Power and evaluation of running status
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 in a kind of data of transformer iron core grounding current on-Line Monitor Device
Address 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
The tested transformer iron core grounding current of current failure critical value and a kind of transformer iron core grounding current on-Line Monitor Device is supervised
Measured value evaluates transformer insulation state, as transformer iron core grounding current monitor value is less than transformer core grounding electricity
Fault critical is flowed, 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
The tested transformer iron core grounding current of current failure critical value and a kind of transformer iron core grounding current on-Line Monitor Device is supervised
Measured value evaluates transformer insulation state, as transformer iron core grounding current monitor value is more than transformer core grounding electricity
10% or more of fault critical is flowed, and the operation phase voltage value of tested transformer same-phase low-pressure side is less than or equal to low
The nominal phase voltage value in side is pressed, 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 present invention, it is noted that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made.
Claims (7)
1. a kind of transformer iron core grounding current on-Line Monitor Device, which is characterized in that connect including being mounted on A phase transformer iron cores
The first current acquisition fixing end (1) of current data is detected on the ground, detects current data on B phase transformer iron core groundings
The second current acquisition fixing end (2), detect on C phase transformer iron core groundings current data third current acquisition it is solid
Fixed end (3) further includes being connected by RS232 serial ports with substation's Energy Management System, for obtaining the same phase of tested transformer
The voltage collector (4) of the phase voltage information of position, and mounted on the indoor data acquisition display end (5) of Substation control, institute
The first current acquisition fixing end (1) for stating, the second current acquisition fixing end (2), third current acquisition fixing end (3), voltage are adopted
Storage (4), which is connected with data acquisition display end (5) by 5GHz wireless communication networks, carries out data communication.
2. a kind of transformer iron core grounding current on-Line Monitor Device according to claim 1, which is characterized in that the first electricity
Stream acquisition fixing end (1) includes being mounted on A phase transformer iron core ground wires to be used to obtain electric current in A phase transformer iron core ground wires
First power current mutual inductor of signal, the output end of the first power current mutual inductor is connected with is converted to number by current signal
The output end of first data processing unit of signal, the first data processing unit is connected with by RS232 serial communication modes
The output end of one wireless telecommunications transmitter, the first wireless telecommunications transmitter is connected to data acquisition display by wireless communication mode
It holds (5).
3. a kind of transformer iron core grounding current on-Line Monitor Device according to claim 1, which is characterized in that the second electricity
Stream acquisition fixing end (2) includes being mounted on B phase transformer iron core ground wires to be used to obtain electric current in B phase transformer iron core ground wires
Second power current mutual inductor of signal, the output end of the second power current mutual inductor is connected with is converted to number by current signal
The output end of second data processing unit of signal, the second data processing unit is connected with by RS232 serial communication modes
The output end of two wireless telecommunications transmitters, the second wireless telecommunications transmitter is connected to data acquisition display by wireless communication mode
It holds (5).
4. a kind of transformer iron core grounding current on-Line Monitor Device according to claim 1, which is characterized in that third electricity
Stream acquisition fixing end (3) includes being mounted on C phase transformer iron core ground wires to be used to obtain electric current in C phase transformer iron core ground wires
The third power current mutual inductor of signal, the output end of third power current mutual inductor is connected with is converted to number by current signal
The output end of the third data processing unit of signal, third data processing unit is connected with by RS232 serial communication modes
The output end of three wireless telecommunications transmitters, third wireless telecommunications transmitter is connected to data acquisition display by wireless communication mode
It holds (5).
5. a kind of transformer iron core grounding current on-Line Monitor Device according to claim 1, which is characterized in that voltage is adopted
Storage (4) includes for counting substation's Energy Management System network information format conversion at needed for data acquisition display end (5)
According to the protocol converter of communication format, input terminal and the substation's Energy Management System output end of protocol converter pass through RS232
Serial communication mode is connected, and the output end of protocol converter is connected with the 4th wireless telecommunications hair by RS232 serial communication modes
Device, the output end of the 4th wireless telecommunications transmitter is sent to be connected to data by wireless communication mode and acquire display end (5).
6. a kind of transformer iron core grounding current on-Line Monitor Device according to claim 1, which is characterized in that data are adopted
It includes computer and wireless communication receiver to collect display end (5), and the output end of wireless communication receiver is connected to the defeated of computer
Enter end, and the output end of wireless communication receiver and the input terminal of computer are RS232 interface.
7. a kind of transformer iron core grounding current on-line monitoring method of any one of claim 1 to 6 described device, feature exist
In including the following steps：
Step 1：A phase transformers, B phase transformers when phase voltage nominal based on tested each single-phase transformer low-pressure side, C phase transformations
Each iron core grounding current value of depressor is set in data acquisition display end (5) by coded address；
Step 2：It is fixed using the first current acquisition fixing end (1), the second current acquisition fixing end (2) and third current acquisition
It holds (3) to obtain and is tested transformer iron core grounding current real time information, and by the electric current real time information by 5G wireless communication modes,
5G wireless communication networks are uploaded to, are equipped with address coding on demand in the data of upload, and acquire on display end (5) with data
Setting address coding corresponds to；
Step 3：Phase voltage real time information is got using voltage collector (4), and the voltage real time information is wireless by 5G
Communication modes upload to 5G wireless communication networks；It is equipped with address coding on demand in the data of upload, and aobvious with data acquisition
Show that setting address coding corresponds on end (5)；
Step 4：Transformer iron core grounding current, same-phase are tested on 5G networks by receiving using data acquisition display end (5)
Low-pressure side phase voltage real time information is associated, and the tested A phase transformers monitored in real time, B phase transformers, C is calculated and displayed
Each iron core grounding current value of phase transformer；A phase transformers, B phase transformers, the operation of C phase transformer same-phase low-pressure sides are mutually electric
Pressure value, the operation phase voltage value of low-pressure side connect with the voltage variety percentage of low-pressure side nominal voltage, tested transformer core
Earth-current monitor value and each iron core grounding electricity of A phase transformers, B phase transformers, C phase transformers in the nominal phase voltage of low-pressure side
The current change quantity percentage of flow valuve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810206311.1A CN108318732B (en) | 2018-03-13 | 2018-03-13 | On-line monitoring device and method for grounding current of transformer core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810206311.1A CN108318732B (en) | 2018-03-13 | 2018-03-13 | On-line monitoring device and method for grounding current of transformer core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108318732A true CN108318732A (en) | 2018-07-24 |
| CN108318732B CN108318732B (en) | 2024-01-23 |
Family
ID=62901545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810206311.1A Active CN108318732B (en) | 2018-03-13 | 2018-03-13 | On-line monitoring device and method for grounding current of transformer core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108318732B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444528A (en) * | 2018-11-05 | 2019-03-08 | 北京许继电气有限公司 | A kind of Transformer Condition Monitoring System and method based on iron core grounding current |
| CN111044935A (en) * | 2019-12-31 | 2020-04-21 | 苏州华电电气股份有限公司 | Multipoint grounding live detection device for transformer core |
| CN113376491A (en) * | 2021-07-02 | 2021-09-10 | 国网福建省电力有限公司南平供电公司 | Portable transformer station electrical equipment insulation fault online screening device and use method thereof |
Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0050705A1 (en) * | 1980-10-25 | 1982-05-05 | GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig | Method and circuit for the contactless measuring of direct and alternating currents, especially momentary current values |
| US4847780A (en) * | 1987-08-21 | 1989-07-11 | Tennessee Valley Public Power Association | Current measuring apparatus |
| CN201413371Y (en) * | 2009-04-09 | 2010-02-24 | 哈尔滨国力电气有限公司 | On-line monitor and fault diagnosis system of transformer |
| CN201654160U (en) * | 2010-04-07 | 2010-11-24 | 北京光耀电力自动化有限公司 | Transformer core grounding AC-DC on-line monitoring device |
| CN102411084A (en) * | 2011-07-26 | 2012-04-11 | 东北电力科学研究院有限公司 | Online monitoring device and method of grounding current of iron core of transformer |
| CN102759681A (en) * | 2012-06-28 | 2012-10-31 | 河南省电力公司信阳供电公司 | Transformer core ground fault monitoring device |
| CN202522618U (en) * | 2012-04-10 | 2012-11-07 | 重庆市电力公司长寿供电局 | Device for carrying out online monitoring on grounding of transformer core |
| CN202583315U (en) * | 2012-05-19 | 2012-12-05 | 保定天腾电气有限公司 | On-line monitoring system for transformer iron core grounding current |
| CN103163364A (en) * | 2013-03-21 | 2013-06-19 | 辽宁省电力有限公司电力科学研究院 | Wireless monitoring device and monitoring method for grounding current of transformer core/clamp |
| CN203287419U (en) * | 2013-05-24 | 2013-11-13 | 天津市方圆电气设备有限公司 | Detection apparatus for grounding current of iron core of transformer |
| CN203299292U (en) * | 2013-05-21 | 2013-11-20 | 国家电网公司 | Professional inspection equipment for insulation state of transformer |
| CN103901314A (en) * | 2014-03-26 | 2014-07-02 | 国家电网公司 | Online monitoring device for monitoring power transformer core ground faults and online monitoring method of online monitoring device |
| CN203688701U (en) * | 2014-01-20 | 2014-07-02 | 国家电网公司 | Transformer sleeve insulation on-line monitoring system |
| CN203759086U (en) * | 2013-12-24 | 2014-08-06 | 北京嘉岳同乐极电子有限公司 | Iron core grounding current online monitoring device |
| CN203798949U (en) * | 2014-03-26 | 2014-08-27 | 国家电网公司 | Online monitoring device for grounding states of iron core of power transformer |
| CN204143613U (en) * | 2014-06-17 | 2015-02-04 | 国家电网公司 | A kind of capacitive current transformer major insulation state specialty inspection device |
| CN104483534A (en) * | 2014-12-04 | 2015-04-01 | 国网四川省电力公司甘孜供电公司 | Intelligent monitoring alarm for grounding current of transformer core |
| CN204462243U (en) * | 2015-03-03 | 2015-07-08 | 国家电网公司 | Master iron core ground current on-Line Monitor Device |
| CN105203886A (en) * | 2015-10-16 | 2015-12-30 | 江苏省电力公司淮安供电公司 | Capacitive type current transformer online detection device and method |
| CN105223450A (en) * | 2015-11-02 | 2016-01-06 | 乐晓蓉 | Transformer core state on_line monitoring method |
| CN205353258U (en) * | 2016-01-25 | 2016-06-29 | 杭州申昊科技股份有限公司 | Transformer core ground connection on -line monitoring system |
| CN205450103U (en) * | 2016-03-29 | 2016-08-10 | 国网上海市电力公司 | On -line monitoring device for grounding current of transformer iron core |
| WO2017016361A1 (en) * | 2015-07-29 | 2017-02-02 | 王富元 | Online monitoring method for resistive leakage current of metal-oxide-varistor lightning arrester or surge protection device |
| CN207882332U (en) * | 2018-03-13 | 2018-09-18 | 国家电网公司 | system for detecting transformer iron core grounding current |
-
2018
- 2018-03-13 CN CN201810206311.1A patent/CN108318732B/en active Active
Patent Citations (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0050705A1 (en) * | 1980-10-25 | 1982-05-05 | GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig | Method and circuit for the contactless measuring of direct and alternating currents, especially momentary current values |
| US4847780A (en) * | 1987-08-21 | 1989-07-11 | Tennessee Valley Public Power Association | Current measuring apparatus |
| CN201413371Y (en) * | 2009-04-09 | 2010-02-24 | 哈尔滨国力电气有限公司 | On-line monitor and fault diagnosis system of transformer |
| CN201654160U (en) * | 2010-04-07 | 2010-11-24 | 北京光耀电力自动化有限公司 | Transformer core grounding AC-DC on-line monitoring device |
| CN102411084A (en) * | 2011-07-26 | 2012-04-11 | 东北电力科学研究院有限公司 | Online monitoring device and method of grounding current of iron core of transformer |
| CN202522618U (en) * | 2012-04-10 | 2012-11-07 | 重庆市电力公司长寿供电局 | Device for carrying out online monitoring on grounding of transformer core |
| CN202583315U (en) * | 2012-05-19 | 2012-12-05 | 保定天腾电气有限公司 | On-line monitoring system for transformer iron core grounding current |
| CN102759681A (en) * | 2012-06-28 | 2012-10-31 | 河南省电力公司信阳供电公司 | Transformer core ground fault monitoring device |
| CN103163364A (en) * | 2013-03-21 | 2013-06-19 | 辽宁省电力有限公司电力科学研究院 | Wireless monitoring device and monitoring method for grounding current of transformer core/clamp |
| CN203299292U (en) * | 2013-05-21 | 2013-11-20 | 国家电网公司 | Professional inspection equipment for insulation state of transformer |
| CN203287419U (en) * | 2013-05-24 | 2013-11-13 | 天津市方圆电气设备有限公司 | Detection apparatus for grounding current of iron core of transformer |
| CN203759086U (en) * | 2013-12-24 | 2014-08-06 | 北京嘉岳同乐极电子有限公司 | Iron core grounding current online monitoring device |
| CN203688701U (en) * | 2014-01-20 | 2014-07-02 | 国家电网公司 | Transformer sleeve insulation on-line monitoring system |
| CN103901314A (en) * | 2014-03-26 | 2014-07-02 | 国家电网公司 | Online monitoring device for monitoring power transformer core ground faults and online monitoring method of online monitoring device |
| CN203798949U (en) * | 2014-03-26 | 2014-08-27 | 国家电网公司 | Online monitoring device for grounding states of iron core of power transformer |
| CN204143613U (en) * | 2014-06-17 | 2015-02-04 | 国家电网公司 | A kind of capacitive current transformer major insulation state specialty inspection device |
| CN104483534A (en) * | 2014-12-04 | 2015-04-01 | 国网四川省电力公司甘孜供电公司 | Intelligent monitoring alarm for grounding current of transformer core |
| CN204462243U (en) * | 2015-03-03 | 2015-07-08 | 国家电网公司 | Master iron core ground current on-Line Monitor Device |
| WO2017016361A1 (en) * | 2015-07-29 | 2017-02-02 | 王富元 | Online monitoring method for resistive leakage current of metal-oxide-varistor lightning arrester or surge protection device |
| CN105203886A (en) * | 2015-10-16 | 2015-12-30 | 江苏省电力公司淮安供电公司 | Capacitive type current transformer online detection device and method |
| CN105223450A (en) * | 2015-11-02 | 2016-01-06 | 乐晓蓉 | Transformer core state on_line monitoring method |
| CN205353258U (en) * | 2016-01-25 | 2016-06-29 | 杭州申昊科技股份有限公司 | Transformer core ground connection on -line monitoring system |
| CN205450103U (en) * | 2016-03-29 | 2016-08-10 | 国网上海市电力公司 | On -line monitoring device for grounding current of transformer iron core |
| CN207882332U (en) * | 2018-03-13 | 2018-09-18 | 国家电网公司 | system for detecting transformer iron core grounding current |
Non-Patent Citations (4)
| Title |
|---|
| 孙庆森;梁小娇;许行;李凯;张国栋;: "变压器铁心接地电流在线监测装置应用研究", 科技资讯, no. 35 * |
| 孙文星;杨贤;李朝晖;孟天男;: "一种高可靠的变压器绝缘状态监测方法", 变压器, no. 01 * |
| 胡文保;侯云海;韩峰波;陈恩泽;: "电力变压器铁芯接地电流在线监测系统研究", 科技与创新, no. 16 * |
| 陈卫中;李清波;刘沛;: "大型变压器铁芯接地在线监测技术的研究", 广东输电与变电技术, no. 02 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444528A (en) * | 2018-11-05 | 2019-03-08 | 北京许继电气有限公司 | A kind of Transformer Condition Monitoring System and method based on iron core grounding current |
| CN109444528B (en) * | 2018-11-05 | 2020-09-18 | 北京许继电气有限公司 | Transformer state monitoring system and method based on iron core grounding current |
| CN111044935A (en) * | 2019-12-31 | 2020-04-21 | 苏州华电电气股份有限公司 | Multipoint grounding live detection device for transformer core |
| CN111044935B (en) * | 2019-12-31 | 2022-06-21 | 苏州华电电气股份有限公司 | Multipoint grounding live detection device for transformer core |
| CN113376491A (en) * | 2021-07-02 | 2021-09-10 | 国网福建省电力有限公司南平供电公司 | Portable transformer station electrical equipment insulation fault online screening device and use method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108318732B (en) | 2024-01-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103605015B (en) | High-precision electric parameter measurement dry-type reactor on-Line Monitor Device and method | |
| CN102497021B (en) | Real-time monitoring and analysis system for distribution circuit | |
| CN102680798B (en) | Online measurement method and device for grounding resistor of rod tower | |
| CN201247278Y (en) | On-line monitoring device for grounding current of transformer iron core | |
| CN207051383U (en) | A kind of intelligent apparatus for avoiding electricity fraudulent | |
| CN100501440C (en) | Insulated on-line monitoring system checker of high-voltage electric equipment | |
| CN108318732A (en) | A kind of transformer iron core grounding current on-Line Monitor Device and method | |
| CN107271776A (en) | A kind of zero load transformer station's phasor measurement test method | |
| CN106896300A (en) | The monitoring device of power cable connector temperature and PD parameters | |
| CN109298222A (en) | A kind of intelligence controls electricity anti-theft system more | |
| CN115236582A (en) | Error online evaluation method and device for three-phase four-wire connection electric energy metering device | |
| CN103487725B (en) | A kind of overhead distribution earth fault indicating device based on zero-sequence component method | |
| CN102608414B (en) | Embedded electric energy measuring method and application extension method of high voltage electrical switchgear | |
| CN207601164U (en) | Electric safety system residual current monitoring module | |
| CN207882332U (en) | system for detecting transformer iron core grounding current | |
| CN105203886A (en) | Capacitive type current transformer online detection device and method | |
| CN209486285U (en) | The online remote verification Intelligent calibration system of electric energy metering device based on data sharing | |
| CN103558432A (en) | High-voltage direct connection type electricity stealing detection device | |
| CN205176158U (en) | Electric capacity type current transformer on -line measuring device | |
| CN201226292Y (en) | Electron type current transformer for ultrahigh voltage transmission line and apparatus for measuring corona loss thereof | |
| CN203673001U (en) | Device for on-line monitoring dry-type reactors by measuring leakage magnetic field | |
| CN203587736U (en) | Overhead distributing line ground fault indicating device based on zero-sequence component method | |
| CN109557500A (en) | The online remote verification Intelligent calibration system of electric energy metering device based on data sharing | |
| CN209182376U (en) | A kind of intelligence controls electricity anti-theft system more | |
| CN210294494U (en) | Shore power supply conversion efficiency testing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |