CN107132437A - The Operation Condition of Power Transformers method of real-time detected based on power attenuation - Google Patents
The Operation Condition of Power Transformers method of real-time detected based on power attenuation Download PDFInfo
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- CN107132437A CN107132437A CN201710322630.4A CN201710322630A CN107132437A CN 107132437 A CN107132437 A CN 107132437A CN 201710322630 A CN201710322630 A CN 201710322630A CN 107132437 A CN107132437 A CN 107132437A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
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Abstract
The Operation Condition of Power Transformers method of real-time detected based on power attenuation, belongs to power transformer safe operation technical field.It is characterized in that：Including monitoring system and following steps：Step 1001, the current signal and voltage signal of power transformer are obtained；Step 1002, input active power and output end power output are obtained；Step 1003, normal loss value is obtained；Step 1004, power deviation percentage is obtained；Step 1005, perform step 1006 in severe conditions and otherwise perform step 1007；Step 1006, trip command is sent；Step 1007, if perform step 1009 in abnormality and otherwise perform step 1008；Step 1008, operation performs step 1009 in critical condition and otherwise performs step 1010；Step 1009, alarm signal is sent；Step 1010, continue to run with.It can be evaluated in the actual motion of power transformer, reliability is greatly promoted.
Description
Technical field
The Operation Condition of Power Transformers method of real-time detected based on power attenuation, belongs to power transformer fortune safely
Row technical field.
Background technology
Power transformer is the capital equipment run in power system, and connection road power network of practising is used in power system, is become
Change voltage, the function such as transmission and distribution electric energy.Power transformer in the course of the work its own to produce active power loss and
Reactive power loss, the active power and reactive power loss of power transformer is relevant with the technical characteristic of transformer, with negative
The change of load and produce nonlinear change；The active power of power transformer consumption is main to be showed in the way of heat, is disappeared
The power of consumption is big, and the running temperature of power transformer is also higher.
The good electrical insulation properties of power transformer are the essential condition of its safe operation, the insulation master of inside transformer
To be made up of transformer oil, insulating paper, cross-over block etc..If transformer oil for a long time at high temperature can accelerated ageing, influence insulation
And radiating；Crisp, the forfeiture mechanical performance, so as to lose that insulating board etc. can also lose elasticity, become under the action of heat for a long time
Electrical strength.Many failures of power transformer are all due to that operating overheat is caused, according to the direct pass of heating and loss
System, therefore detection, the control operating power attenuation of power transformer and abnormal overheat, to ensureing power transformer safe operation
It is most important.
The evaluation of running status method of traditional power transformer, which needs to have a power failure, carries out routine test or diagnostic test,
Such as：Insulaion resistance, DC leakage-current, sleeve pipe are measured together with dielectric loss factor, load loss, open circuit loss of winding etc.
Multiple electrical quantity, or powered infrared measurement of temperature, progress chromatography of gases analysis etc. of drawing oil sample judge whether power transformer had
Hot stall.Due to needing the measurement of progress relevant parameter after powering off, therefore one can be caused to be fixed to the working condition of power system
Ring, what is more important power transformer can not really reflect its running status, many parameters and actual motion after a loss of power
When can have relatively large deviation, therefore measurement results reliability is substantially reduced, or even ND when can cover some operations is lacked
Fall into, as larger accident potential.
The content of the invention
The technical problem to be solved in the present invention is：Overcome the deficiencies in the prior art actual in power transformer there is provided one kind
Its working condition is evaluated in operation, the running status of power transformer can be really reflected, judge reliability is big
The Operation Condition of Power Transformers method of real-time detected based on power attenuation lifted greatly.
The technical solution adopted for the present invention to solve the technical problems is：The power transformer detected based on power attenuation
Running state real-time monitoring method, it is characterised in that：Including a monitoring system for being used to obtain the operational factor of power transformer
System, and comprise the following steps：
Step 1001, monitoring system obtains the current signal and voltage signal and load-side of power transformer current side respectively
Current signal and voltage signal；
Step 1002, monitoring system is believed by the current signal and voltage of the power transformer mains side respectively obtained in step 1
Number and load-side current signal and voltage signal, calculate obtain the input active power of power transformer mains side respectively
P1 and load-side output end power output P2, and further calculate the active loss work(obtained under power transformer load condition
Rate value △ P, △ P=P1-P2；
Step 1003, monitoring system obtains the normal damage of power transformer in the loaded state according to normal loss value calculation formula
Consumption value；
Step 1004, monitoring system obtains power transformer active loss and normal loss value using percentage formula calculation formula
Power deviation percentage；
Step 1005, monitoring system judges whether the running status of power transformer is in severe conditions, if power transformer
In severe conditions, step 1006 is performed, if being not in severe conditions, step 1007 is performed；
Step 1006, monitoring system sends trip command to the breaker of power transformer, makes power transformer out of service；
Step 1007, monitoring system judges whether the running status of power transformer is in abnormality, if power transformer
In abnormality, step 1009 is performed, if being not in abnormality, step 1008 is performed；
Step 1008, monitoring system judges whether the running status of power transformer is in critical condition, if power transformer
In critical condition, step 1009 is performed, if being not in critical condition, step 1010 is performed；
Step 1009, monitoring system sends alarm signal；
Step 1010, power transformer is in normal condition, continues to run with, and return to step 1001.
It is preferred that, the normal loss value calculation formula described in step 1003 is：
△p= Pk+(I/In)2 Po
Wherein, △ p are the calculated value of active loss of the power capacitor under the load condition, and Pk is power transformer volume
Determine open circuit loss, I is primary side real-time operating current, and In is power transformer rated current, Po power transformer nominal loads
Loss.
It is preferred that, the percentage formula calculation formula described in step 1004 is：
C=（△P-△p）/△P×100%
Wherein, △ p are the calculated value of the active loss of power capacitor in the loaded state, and △ P are negative for power transformer
Active loss performance number under load state.
It is preferred that, whether the running status of the power transformer described in step 1005 is in the judgment basis of severe conditions
For：The power deviation percentage of power transformer active loss described in step 1004 and normal loss value whether more than 20%,
If it exceeds 20%, then it represents that the running status of power transformer is in severe conditions.
It is preferred that, whether the running status of the power transformer described in step 1007 is in the judgment basis of abnormality
For：The power deviation percentage of power transformer active loss described in step 1004 and normal loss value whether between 15% ~
Between 20%, if between 15% ~ 20%, then it represents that the running status of power transformer is in abnormality.
It is preferred that, whether the running status of the power transformer described in step 1008 is in the judgment basis of critical condition
For：The power deviation percentage of power transformer active loss described in step 1004 and normal loss value whether between 10% ~
Between 15%, if between 10% ~ 15%, then it represents that the running status of power transformer is in critical condition.
It is preferred that, described monitoring system includes signal acquisition module, logic processing module, sound and light alarm module and led to
The output end of news module, current transformer and voltage transformer connects the input of signal acquisition module, signal acquisition mould simultaneously
The input of the output end connection logic processing module of block, the input of the output end connecting communication module of logic processing module,
The output end connection client of communication module, is also connected in the output end of logic processing module with sound and light alarm module.
It is preferred that, described current transformer includes being separately positioned on power transformer mains side and the mains side of load-side
Current transformer and load-side current transformer, described voltage transformer include being arranged on power transformer mains side and load
The mains side voltage transformer and load side voltage transformer of side.
Compared with prior art, the present invention is had an advantageous effect in that：
1st, can be in power transformer by the Operation Condition of Power Transformers method of real-time that this is detected based on power attenuation
Its working condition is evaluated in actual motion, the running status of power transformer can be really reflected, judgement can
Greatly promoted by degree.
2nd, due to that need not be powered off to power transformer after measurement, therefore will not be to the working condition of power system
Have any impact, what is more important avoids power transformer can not really reflect its running status after a loss of power, permitted
There can be the defect of relatively large deviation when multi-parameter is with actual motion.
3rd, when carrying out parameter acquisition, the mains side of power transformer being arranged on originally and load-side have been used respectively
Current transformer and voltage transformer, therefore increase other test equipments, therefore this electricity based on power attenuation detection newly
The cost of power running state of transformer method of real-time is substantially reduced.
Brief description of the drawings
Fig. 1 is the Operation Condition of Power Transformers method of real-time flow chart detected based on power attenuation.
Fig. 2 is the Operation Condition of Power Transformers method of real-time parameter measurement unit principle detected based on power attenuation
Block diagram.
Embodiment
Fig. 1 ~ 2 are highly preferred embodiment of the present invention, and 1 ~ 2 the present invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, the Operation Condition of Power Transformers method of real-time detected based on power attenuation, including following step
Suddenly：
Step 1001, power transformer mains side and the current signal and voltage signal of load-side are obtained；
As shown in Fig. 2 when implementing this Operation Condition of Power Transformers method of real-time based on power attenuation detection, setting
There is Operation Condition of Power Transformers real-time monitoring system（Hereinafter referred to as monitoring system）, monitoring system includes：Signal acquisition module,
The output end of logic processing module, sound and light alarm module and communication module, current transformer and voltage transformer is connected simultaneously
The input of signal acquisition module, the output end of signal acquisition module connects the input of logic processing module, logical process mould
The input of the output end connecting communication module of block, the output end connection client of communication module.Signal acquisition module is used to connect
The data of current transformer or voltage transformer or electric energy meter feeding are received, and data are sent into logic processing module, logical process
Module is calculated after receiving corresponding data, and result of calculation analyze and then obtained information feeding will be analyzed
Communication module, client is sent into by communication module.The output end of logic processing module is also connected with sound and light alarm module, driving sound
Light alarm module sends alarm signal.
Current transformer includes being arranged on power transformer mains side and the mains side Current Mutual Inductance of load-side originally respectively
Device and load-side current transformer, voltage transformer equally include being arranged on power transformer mains side and the electricity of load-side originally
Source side voltage transformer and load side voltage transformer.In this step, mains side current transformer and mains side are passed through respectively
Voltage transformer obtains current signal and voltage signal of the power transformer in current side, while can be by being arranged on load-side
Load-side current transformer and load side voltage transformer obtain current signal and voltage of the power transformer in load-side respectively
Signal.
Step 1002, power transformer input power, power output and actual power dissipation are obtained；
Logic processing module passes through the power transformer mains side respectively obtained in step 1 and the current signal and voltage of load-side
Signal, calculates obtain the input active-power P 1 of power transformer mains side and the output end power output of load-side respectively
P2, and further calculate active loss performance number △ P, the △ P=P1-P2 obtained under power transformer load condition.
Step 1003, the normal loss under power transformer load condition is obtained；
Logic processing module calculates according to equation below and obtains the normal loss value of power transformer in the loaded state：
△p= Pk+(I/In)2 Po
Wherein, △ p are the calculated value of active loss of the power capacitor under the load condition, and Pk is power transformer volume
Determine open circuit loss, I is primary side real-time operating current, and In is power transformer rated current, Po power transformer nominal loads
Loss.
Step 1004, calculate and obtain power transformer active loss and the power deviation percentage of normal loss value；
Logic processing module is calculated using equation below and obtains power transformer active loss and the power deviation of normal loss value
Percentage：
C=（△P-△p）/△P×100%
Wherein, △ p are the calculated value of the active loss of power capacitor in the loaded state, and △ P are negative for power transformer
Active loss performance number under load state.
Step 1005, if in severe conditions；
Logic processing module judges whether the current running status of power transformer is in severe conditions, and its judgment basis is electric power
Whether transformer active loss and the power deviation percentage of normal loss value are more than 20%, if greater than 20%, power transformer
In severe conditions, step 1006 is performed, if being not in severe conditions, step 1007 is performed.
Step 1006, trip command is sent；
Logic processing module sends trip command to the breaker of power transformer, makes power transformer out of service.
Step 1007, if in abnormality；
Logic processing module judges whether the current running status of power transformer is in abnormality, and its judgment basis is electric power
Whether transformer active loss and the power deviation percentage of normal loss value are between 15% ~ 20%, if between 15% ~ 20%
Between, then power transformer is in abnormality, performs step 1009, if being not in abnormality, performs step 1008.
Step 1008, if in critical condition；
Logic processing module judges whether the current running status of power transformer is in critical condition, and its judgment basis is electric power
Whether transformer active loss and the power deviation percentage of normal loss value are between 10% ~ 15%, if between 10% ~ 15%
Between, then power transformer is in critical condition, performs step 1009, if being not in critical condition, performs step 1010.
Step 1009, alarm signal is sent；
Logic processing module sends alarm signal by sound and light alarm module.
It is to be required for sending alarm by sound and light alarm module because power transformer is in abnormality and critical condition
Signal, and abnormality is different with the order of severity of critical condition, therefore respectively to two kinds of shapes of abnormality and critical condition
When state is alarmed, it can be distinguished by different type of alarms.
Step 1010, power transformer is in normal condition, continues to run with；
If the working condition of power transformer is not at any in above-mentioned severe conditions, abnormality and critical condition
One kind, then power transformer is in normal operating conditions, and power transformer is normally run, and return to step 1001, performs next
It is individual to judge circulation.
Specific work process and operation principle are as follows：
Power transformer is obtained by mains side current transformer and mains side voltage transformer first in the electric current of current side to believe
Number and voltage signal, and electricity is obtained by the load-side current transformer and load side voltage transformer for being arranged on load-side respectively
Current signal and voltage signal of the power transformer in load-side.The voltage signal and current signal of power transformer mains side and
The voltage brother signal and current signal of load-side are sent into logic processing module by signal acquisition module respectively.
Logic processing module is calculated respectively by power transformer mains side and the current signal and voltage signal of load-side
The input active-power P 1 of power transformer mains side and the output end power output P2 of load-side are obtained, and is further calculated
Obtain the active loss performance number △ P under power transformer load condition.Then logic processing module passes through formula △ p=Pk+
(I/In)2Po is calculated and is obtained the normal loss value of power transformer in the loaded state.Then logic processing module is further sharp
With formula C=（△P-△p）/ △ P × 100%, which is calculated, obtains power transformer active loss and the power deviation hundred of normal loss value
Divide ratio.
Logic processing module judges whether power transformer active loss and the power deviation percentage of normal loss value are big
In 20%, if greater than 20%, power transformer is in severe conditions, and logic processing module is sent to the breaker of power transformer
Trip command, makes power transformer out of service, it is to avoid the generation of accident.Logic processing module judges the actual damage of power transformer
If the power deviation percentage of consumption and normal loss value is between 15% ~ 20%, power transformer is in abnormality；Such as
If fruit power transformer active loss and the power deviation percentage of normal loss value are between 10% ~ 15%, electric power becomes
Depressor is in critical condition, and when power transformer is in abnormality and critical condition, logic processing module passes through acousto-optic report
Alert module sends alarm signal.If the working condition of power transformer be not at above-mentioned severe conditions, abnormality and
Any one of critical condition, then power transformer is in normal operating conditions, and power transformer is normally run, and performs next
It is individual to judge circulation.
The above described is only a preferred embodiment of the present invention, being not the limitation for making other forms to the present invention, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But it is every without departing from technical solution of the present invention content, the technical spirit according to the present invention is to above example institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection domain of technical solution of the present invention.
Claims (8)
1. the Operation Condition of Power Transformers method of real-time detected based on power attenuation, it is characterised in that：Including a use
In the monitoring system for the operational factor for obtaining power transformer, and comprise the following steps：
Step 1001, monitoring system obtains the current signal and voltage signal and load-side of power transformer current side respectively
Current signal and voltage signal；
Step 1002, monitoring system is believed by the current signal and voltage of the power transformer mains side respectively obtained in step 1
Number and load-side current signal and voltage signal, calculate obtain the input active power of power transformer mains side respectively
P1 and load-side output end power output P2, and further calculate the active loss work(obtained under power transformer load condition
Rate value △ P, △ P=P1-P2；
Step 1003, monitoring system obtains the normal damage of power transformer in the loaded state according to normal loss value calculation formula
Consumption value；
Step 1004, monitoring system obtains power transformer active loss and normal loss value using percentage formula calculation formula
Power deviation percentage；
Step 1005, monitoring system judges whether the running status of power transformer is in severe conditions, if power transformer
In severe conditions, step 1006 is performed, if being not in severe conditions, step 1007 is performed；
Step 1006, monitoring system sends trip command to the breaker of power transformer, makes power transformer out of service；
Step 1007, monitoring system judges whether the running status of power transformer is in abnormality, if power transformer
In abnormality, step 1009 is performed, if being not in abnormality, step 1008 is performed；
Step 1008, monitoring system judges whether the running status of power transformer is in critical condition, if power transformer
In critical condition, step 1009 is performed, if being not in critical condition, step 1010 is performed；
Step 1009, monitoring system sends alarm signal；
Step 1010, power transformer is in normal condition, continues to run with, and return to step 1001.
2. the Operation Condition of Power Transformers method of real-time according to claim 1 detected based on power attenuation, its
It is characterised by：Normal loss value calculation formula described in step 1003 is：
△p= Pk+(I/In)2 Po
Wherein, △ p are the calculated value of active loss of the power capacitor under the load condition, and Pk is power transformer volume
Determine open circuit loss, I is primary side real-time operating current, and In is power transformer rated current, Po power transformer nominal loads
Loss.
3. the Operation Condition of Power Transformers method of real-time according to claim 1 detected based on power attenuation, its
It is characterised by：Percentage formula calculation formula described in step 1004 is：
C=（△P-△p）/△P×100%
Wherein, △ p are the calculated value of the active loss of power capacitor in the loaded state, and △ P are negative for power transformer
Active loss performance number under load state.
4. the Operation Condition of Power Transformers method of real-time according to claim 1 detected based on power attenuation, its
It is characterised by：Whether the judgment basis in severe conditions is the running status of power transformer described in step 1005：Step
The power deviation percentage of power transformer active loss described in rapid 1004 and normal loss value whether more than 20%, if
More than 20%, then it represents that the running status of power transformer is in severe conditions.
5. the Operation Condition of Power Transformers method of real-time according to claim 1 detected based on power attenuation, its
It is characterised by：Whether the judgment basis in abnormality is the running status of power transformer described in step 1007：Step
The power deviation percentage of power transformer active loss described in rapid 1004 and normal loss value whether between 15% ~ 20% it
Between, if between 15% ~ 20%, then it represents that the running status of power transformer is in abnormality.
6. the Operation Condition of Power Transformers method of real-time according to claim 1 detected based on power attenuation, its
It is characterised by：Whether the judgment basis in critical condition is the running status of power transformer described in step 1008：Step
The power deviation percentage of power transformer active loss described in rapid 1004 and normal loss value whether between 10% ~ 15% it
Between, if between 10% ~ 15%, then it represents that the running status of power transformer is in critical condition.
7. the Operation Condition of Power Transformers method of real-time according to claim 1 detected based on power attenuation, its
It is characterised by：Described monitoring system includes signal acquisition module, logic processing module, sound and light alarm module and communication mould
The output end of block, current transformer and voltage transformer connects the input of signal acquisition module simultaneously, signal acquisition module
Output end connects the input of logic processing module, the input of the output end connecting communication module of logic processing module, communication
The output end connection client of module, is also connected in the output end of logic processing module with sound and light alarm module.
8. the Operation Condition of Power Transformers method of real-time according to claim 7 detected based on power attenuation, its
It is characterised by：Described current transformer includes being separately positioned on power transformer mains side and the mains side electric current of load-side is mutual
Sensor and load-side current transformer, described voltage transformer include being arranged on power transformer mains side and the electricity of load-side
Source side voltage transformer and load side voltage transformer.
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| CN107797047A (en) * | 2017-09-27 | 2018-03-13 | 深圳和而泰智能控制股份有限公司 | Load state detecting method, device and electronic equipment |
| CN108761195A (en) * | 2018-05-30 | 2018-11-06 | 广东电网有限责任公司 | A kind of distribution transformer power attenuation synchronous measuring apparatus |
| CN108880612A (en) * | 2018-04-27 | 2018-11-23 | 广州杰赛科技股份有限公司 | Detection method, device and the loss detection system of multi-system access platform loss |
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| CN111443305A (en) * | 2018-12-27 | 2020-07-24 | 贵州中烟工业有限责任公司 | Method and device for detecting line fault by using electric energy deviation value |
| CN109742736A (en) * | 2019-01-22 | 2019-05-10 | 希望森兰科技股份有限公司 | High-voltage frequency converter guard method based on frequency converter itself energy consumption |
| CN112731221A (en) * | 2020-12-22 | 2021-04-30 | 广东电网有限责任公司电力科学研究院 | Power transformer winding deformation online monitoring method and device |
| CN112578179A (en) * | 2020-12-24 | 2021-03-30 | 国网江苏省电力有限公司苏州供电分公司 | Power monitoring method |
| CN112578179B (en) * | 2020-12-24 | 2023-09-19 | 国网江苏省电力有限公司苏州供电分公司 | Power monitoring method |
| CN112946530A (en) * | 2021-02-01 | 2021-06-11 | 山东理工大学 | Transformer turn-to-turn fault and phase identification method and system based on power loss |
| CN113092914A (en) * | 2021-04-09 | 2021-07-09 | 广东电网有限责任公司 | Transformer loss monitoring method and transformer loss monitoring system |
| CN113504493A (en) * | 2021-05-26 | 2021-10-15 | 广州市一变电气设备有限公司 | Dry-type transformer abnormity detection method |
| CN113504493B (en) * | 2021-05-26 | 2022-03-04 | 广州市一变电气设备有限公司 | Dry-type transformer abnormity detection method |
| CN113687154A (en) * | 2021-08-05 | 2021-11-23 | 南方电网科学研究院有限责任公司 | Method, device and equipment for monitoring no-load running state of transformer and storage medium |
| CN113687154B (en) * | 2021-08-05 | 2024-01-26 | 南方电网科学研究院有限责任公司 | No-load operation state monitoring method, device and equipment of transformer and storage medium |
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Application publication date: 20170905 |