CN201417270Y - Transformer oil monitoring system - Google Patents

Transformer oil monitoring system Download PDF

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Publication number
CN201417270Y
CN201417270Y CN 200920108305 CN200920108305U CN201417270Y CN 201417270 Y CN201417270 Y CN 201417270Y CN 200920108305 CN200920108305 CN 200920108305 CN 200920108305 U CN200920108305 U CN 200920108305U CN 201417270 Y CN201417270 Y CN 201417270Y
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China
Prior art keywords
control signal
subelement
unit
data
transformer
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Expired - Fee Related
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CN 200920108305
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Chinese (zh)
Inventor
申烛
范子超
周继威
余忠源
孟凯锋
蒋修远
王栋
徐长安
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Zhongneng Power Tech Development Co Ltd
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Zhongneng Power Tech Development Co Ltd
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  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

The utility model provides a transformer oil monitoring system. The system comprises a parameter acquisition unit which is used for acquiring the basic parameter of gas and moisture in transformer oil, a data analysis unit which comprises a calculation subunit, a judgment subunit and a control signal generating subunit, and a warning unit which is used for generating a warning signal according toa control signal generated by the control signal generating subunit, wherein, the calculation subunit is used for figuring out the required monitoring data according to the basic parameter acquired bythe parameter acquisition unit; the judgment subunit is used for judging whether the monitoring data figured out by the calculation subunit exceeds the range of the prestored set value or not; and the control signal generating subunit is used for generating the control signal when the fact is found that the monitoring data exceeds the range of the prestored set value. The utility model can monitor the gas and moisture in the transformer oil timely, so that people can know the running state and potential failures of a transformer.

Description

The transformer oil monitoring system
Technical field
The utility model relates to the monitoring device of power equipment, particularly a kind of transformer oil monitoring system.
Background technology
Transformer is a power equipment main in the power industry, plays a very important role in whole safe operation of power system.For large-scale power transformer, all be to insulate and dispel the heat at present with oil, along with the long-time running of transformer, can sneak into some gases and moisture in the transformer oil.The parameters such as content of gas and moisture reflect the degree of transformer insulated aging or fault to a certain extent, can be used as the unusual characteristic quantity of reflection electrical equipment.Therefore by dissolved gas in the transformer insulation oil and moisture are monitored operation conditions and the latency fault that can learn transformer, trouble-saving generation.
Traditional monitoring method is that the insulation oil sample is taken a sample from transformer, through Laboratory Instruments gas, moisture is separated with oil, analyzes gas such as CH in the oil 4, C 2H 2, C 2H 4, C 2H 6, H 2, CO, CO 2Wait the parameters such as content of each components contents and water content in oil, analyze the latency failure condition of this transformer according to the parameter that obtains.But this method has complicated operation, long, the big shortcoming of detection personal error of sense cycle, cause being not suitable for monitoring in real time, thereby can not grasp the ruuning situation and the latency failure condition of transformer immediately according to the parameter of Gas in Oil of Transformer and moisture.
The utility model content
In view of this, fundamental purpose of the present utility model is to provide a kind of transformer oil monitoring system, can monitor Gas in Oil of Transformer and moisture immediately.
The transformer oil monitoring system that the utility model provides comprises:
Parameter acquiring unit 100 is used to obtain the basic parameter of Gas in Oil of Transformer and moisture;
Data analysis unit 101 comprises that computation subunit 1011, judgment sub-unit 1012 and control signal generate subelement 1013, wherein,
Computation subunit 1011 is used for obtaining required Monitoring Data according to the Parameter Calculation that parameter acquiring unit 100 is obtained,
Judgment sub-unit 1012 is used to judge whether Monitoring Data that computation subunit 1011 calculates exceeds the scope of the setting value that prestores,
Control signal generates subelement 1013 and be used for generating control signal when judgment sub-unit 1012 judges that Monitoring Data surpasses range of set value;
Caution unit 105 is used for generating the control signal generation alerting signal that subelement 1013 generates according to control signal.
As from the foregoing, the system that adopts above-mentioned each unit to constitute can realize immediately Gas in Oil of Transformer and moisture being monitored, thereby learns the operation conditions and the latency fault of transformer.
Preferable, also comprise: packing data is handled subelement 1021, is used for Monitoring Data that basic parameter that parameter acquiring unit 100 is obtained and computation subunit 1011 calculate according to the processing of packing of certain agreement;
Transmission unit 104, the data transmission that is used for packing data is handled subelement 1021 packing is gone out.
As from the foregoing, adopt above-mentioned packing data to handle subelement and transmission unit, basic parameter and Monitoring Data can be transferred to external computing machine, so that the user stores data and further analyzes.
Preferable, also comprise: control signal conversion subelement 1022 is used for that control signal is generated the control signal that subelement 1013 generates and is converted to output unit 103 discernible signals;
Output unit 103 is used for the action of switching on or cutting off the power supply according to the control signal of control signal conversion subelement 1022 conversions.
As from the foregoing, adopt above-mentioned control signal conversion subelement 1022 and output unit 103, the user just can connect panalarm by output unit as required, as audible-visual annunciator, hummer etc., and the maintenance work that the prompting user is correlated with.
One of wherein, below transmission unit 104 also comprises at least: Ethernet interface subelement 1043, RS232 interface subelement 1042 and RS485 interface subelement 1041, wherein,
Ethernet interface subelement 1043 is used for the remote transmission Ethernet data;
RS232 interface subelement 1042 is used for local the setting;
RS485 interface subelement 1041 is used for local transmission data.
As from the foregoing, adopt above-mentioned Ethernet interface subelement 1043, RS232 interface subelement 1042 or RS485 interface subelement 1041 can make data based need the transmission by different interfaces.
Description of drawings
Fig. 1 is the schematic diagram of transformer oil monitoring system;
Fig. 2 is the communication control unit circuit diagram;
Fig. 3 is for extending out the RAM circuit diagram;
Fig. 4 is for extending out the Flash circuit diagram;
Fig. 5 is for extending out the serial FLASH circuit diagram;
Fig. 6 is the power circuit diagram that comprises isolation circuit;
Fig. 7 is a clocking scheme;
Fig. 8 is an Ethernet interface subelement circuit diagram;
Fig. 9 is a RS232 interface subelement circuit diagram;
Figure 10 is a RS485 interface subelement circuit diagram;
Figure 11 is the single overvoltage protection circuit of RS232 interface;
Figure 12 is the overvoltage protection circuit of RS485 interface subelement;
Figure 13 is the circuit diagram of data analysis unit;
Figure 14 is the LED control circuit.
Embodiment
Fig. 1 is the schematic diagram of transformer oil monitoring system, as shown in the figure, the transformer oil monitoring system that the utility model provides comprises: parameter acquiring unit 100, data analysis unit 101, communication control unit 102, caution unit 105, output unit 103, transmission unit 104, wherein
Parameter acquiring unit 100 is used to obtain the basic parameters such as content, rate of change and mean value of Gas in Oil of Transformer and moisture.Parameter acquiring unit 100 can adopt Gas in Oil of Transformer and moisture transducer, and the sensor can obtain hydrogen in the transformer oil (H2), carbon monoxide (CO), acetylene (C2H2), the content of ethene gases such as (C2H4) and the parameters such as humidity value of transformer oil.The sensor can obtain the content parameter of gas and moisture continuously, for example obtains once every 5 seconds.
Data analysis unit 101 comprises that computation subunit 1011, judgment sub-unit 1012 and control signal generate subelement 1013, computation subunit 1011 is used for obtaining required Monitoring Data according to the Parameter Calculation obtained, as 10 day average of moisture in 10 days rate of change of Gas in Oil of Transformer content, the transformer oil etc.; Judgment sub-unit 1012 is used to judge whether the Monitoring Data that calculates exceeds the scope of the setting value that prestores; Control signal generates subelement 1013 and be used for generating control signal when judgment sub-unit 1012 judges that Monitoring Data surpasses range of set value.For example, computation subunit 1011 is according to the ratio of CO/CO2 gas content in the cubage transformer oil of CO and CO2 gas, judgment sub-unit 1012 judges that scope that whether ratio that calculates exceed the setting value that prestores (for example, the scope of setting can be CO/CO2 ratio greater than 0.09 less than 0.33), when CO/CO2 ratio less than 0.09 or greater than 0.33 the time control signal generate subelement 1013 and generate control signals.
Caution unit 105 is used for producing alerting signal according to the control signal that receives.Caution unit 105 adopts the LED lamp, and the LED control circuit as shown in figure 14.
Communication control unit 102 comprises that packing data is handled subelement 1021 and control signal is changed subelement 1022, packing data is handled subelement 1021 and is used for the basic parameter that will receive and the Monitoring Data that calculates according to certain agreement (as 101 agreements) processings of packing, and control signal is changed the control signal that subelement 1022 is used for receiving and is converted to output unit 103 discernible signals.Fig. 2 is the communication control unit circuit diagram, as shown in the figure, communication control unit 102 adopts the Rabbit3000 chips, and the power circuit of Rabbit3000 chip and clock circuit are distinguished as shown in Figure 6 and Figure 7, and wherein power circuit also comprises the isolation circuit that prevents supply voltage generation saltus step.Communication control unit 102 also extends out 512k * 8BRAM of being used for temporal data, is used for stored program 512K FLASH and is used to store the serial FLASH of data, wherein, RAM circuit diagram, Flash circuit diagram and serial FLASH circuit diagram are respectively as Fig. 3, Fig. 4, shown in Figure 5.
Output unit 103 is used for switching on or the output action of the switching value of cutting off the power supply according to the control signal after the conversion.Output unit 103 can adopt solid-state relay, and the input end of this solid-state relay is according to the closed or disconnection of the control signal control output end that receives.The output terminal of this solid-state relay is in off-state at ordinary times, control output end closure after the input end of solid-state relay receives control signal (high level or low level).The user can be as required at the output terminal connection panalarm of solid-state relay, and as audible-visual annunciator, hummer etc., above-mentioned panalarm just can send warning after energized, the maintenance job that the prompting user is correlated with.
Transmission unit 104 is used for the data transmission of packing is gone out, and can be transferred to external computing machine, so that the user stores data and further analyzes.Comprise Ethernet interface subelement 1043, RS232 interface subelement 1042 and RS485 interface subelement 1041, be respectively applied for remote ethernet data transmission, the local setting and local data transfer.Fig. 8 is an Ethernet interface subelement circuit diagram, as shown in the figure, this Ethernet interface subelement 1043 adopts the RTL8019AS chip, Fig. 9 is a RS232 interface subelement circuit diagram, as shown in the figure, this RS232 interface subelement 1042 adopts the MAX232 chip, and Figure 10 is a RS485 interface subelement circuit diagram, as shown in the figure, this RS485 interface subelement 1041 adopts the MAX487 chip.Above-mentioned two interface circuits have not only comprised the transient overvoltage holding circuit but also have comprised optically coupled isolation circuit, as Figure 11 and shown in Figure 12.
Principle of work to the transformer oil monitoring system that provides of the present utility model is introduced below.
Parameter acquiring unit 100 was obtained the content parameter of gas and moisture every 5 seconds; Computation subunit 1011 obtains required Monitoring Data according to the Parameter Calculation of obtaining, as 10 day average of moisture and the ratio of CO/CO2 gas content etc. in 10 days rate of change of Gas in Oil of Transformer content, the transformer oil; Judgment sub-unit 1012 judges whether the Monitoring Data that calculates exceeds the scope of the setting value that prestores (as the setting value of the CO/CO2 ratio that prestores is less than 0.33 greater than 0.09); Control signal generates subelement 1013 and generate control signal when judgment sub-unit 1012 judges that Monitoring Data surpass range of set value, promptly when CO/CO2 ratio less than 0.09 or greater than 0.33 the time control signal generate subelement 1013 generation control signals; Caution unit 105 is according to the control signal generation alerting signal that receives, and for example the LED alarm lamp is luminous.
On the other hand, control signal conversion subelement 1022 is converted to output unit 103 discernible signals with the control signal that control signal generates subelement 1013 generations; The action that output unit 103 is switched on or cut off the power supply according to the control signal after changing.For example, output unit 103 adopts often drives solid-state relay, and the output terminal of this solid-state relay is in off-state at ordinary times, control output end closure after the input end of solid-state relay receives closed control signal (high level or low level).At this moment the panalarm (as audible-visual annunciator, hummer etc.) that is connected with the output terminal of solid-state relay electric, send sound and light alarm.
And packing data is handled Monitoring Data that basic parameter that subelement 1021 obtains parameter acquiring unit 100 and computation subunit 1011 calculate according to certain agreement (as 101 agreements) processings of packing, and then transmission unit 104 is gone out the data transmission of packing.Data can be carried out remote transmission or carry out this locality transmission through RS485 interface subelement 1041 through Ethernet interface subelement 1043.Above-mentioned data can be transferred to external computing machine, so that the user stores data and further analyzes.
Many (in the present embodiment maximum 128) transformer oil monitoring systems can connect to form LAN (Local Area Network) by RS485 and a computing machine, the transformer oil monitoring system can also be connected with remote computer by Ethernet interface in addition, so just makes things convenient for the user that the Monitoring Data that many transformer oil monitoring systems obtain is managed.
Data analysis unit 101 can also be sent different control signals above the degree of setting value to caution unit 105 according to Monitoring Data.LED lamp as caution unit 105 then can produce different alerting signals such as single sudden strain of a muscle, two sudden strains of a muscle according to the difference of control signal, for example, control LED lamp list dodged after caution unit 105 received the control signal that expression generally overflows, and caution unit 105 receives two sudden strain of a muscle of control LED lamp after the control signal that expression seriously overflows.Certainly the LED lamp also can be set to a plurality of as required.
The Monitoring Data that transformer oil monitoring system of the present utility model obtains can reflect power transformer latency fault immediately, accurately.The user can carry out in good time maintenance, maintenance to transformer according to Monitoring Data, improves the operational reliability of transformer.

Claims (4)

1. a transformer oil monitoring system is characterized in that, comprising:
Parameter acquiring unit (100) is used to obtain the basic parameter of Gas in Oil of Transformer and moisture;
Data analysis unit (101) comprises that computation subunit (1011), judgment sub-unit (1012) and control signal generate subelement (1013), wherein,
Computation subunit (1011) is used for obtaining required Monitoring Data according to the Parameter Calculation that parameter acquiring unit (100) is obtained,
Judgment sub-unit (1012) is used to judge whether Monitoring Data that computation subunit (1011) calculates exceeds the scope of the setting value that prestores,
Control signal generates subelement (1013) and be used for generating control signal when judgment sub-unit (1012) judges that Monitoring Data surpasses range of set value;
Caution unit (105) is used for generating the control signal generation alerting signal that subelement (1013) generates according to control signal.
2. system according to claim 1 is characterized in that, also comprises:
Packing data is handled subelement (1021), is used for Monitoring Data that basic parameter that parameter acquiring unit (100) is obtained and computation subunit (1011) calculate according to the processing of packing of certain agreement;
Transmission unit (104), the data transmission that is used for packing data is handled subelement (1021) packing is gone out.
3. system according to claim 2 is characterized in that, also comprises:
Control signal conversion subelement (1022) is used for that control signal is generated the control signal that subelement (1013) generates and is converted to the discernible signal of output unit (103);
Output unit (103) is used for the action of switching on or cutting off the power supply according to the control signal of control signal conversion subelement (1022) conversion.
One of 4. system according to claim 2 is characterized in that, below transmission unit (104) also comprises at least: Ethernet interface subelement (1043), RS232 interface subelement (1042) and RS485 interface subelement (1041), wherein,
Ethernet interface subelement (1043) is used for the remote transmission Ethernet data;
RS232 interface subelement (1042) is used for local the setting;
RS485 interface subelement (1041) is used for local transmission data.
CN 200920108305 2009-05-31 2009-05-31 Transformer oil monitoring system Expired - Fee Related CN201417270Y (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN 200920108305 CN201417270Y (en) 2009-05-31 2009-05-31 Transformer oil monitoring system

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103592425A (en) * 2013-10-22 2014-02-19 上海申瑞继保电气有限公司 Offsite monitoring method for multi-component gas in transformer oil
CN107389816A (en) * 2017-07-13 2017-11-24 国网四川省电力公司电力科学研究院 Gases Dissolved in Transformer Oil on-Line Monitor Device detecting system self-checking device
CN111413491A (en) * 2020-04-11 2020-07-14 深圳市资通科技有限公司 Oil-filled equipment insulation aging evaluation platform

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103592425A (en) * 2013-10-22 2014-02-19 上海申瑞继保电气有限公司 Offsite monitoring method for multi-component gas in transformer oil
CN107389816A (en) * 2017-07-13 2017-11-24 国网四川省电力公司电力科学研究院 Gases Dissolved in Transformer Oil on-Line Monitor Device detecting system self-checking device
CN111413491A (en) * 2020-04-11 2020-07-14 深圳市资通科技有限公司 Oil-filled equipment insulation aging evaluation platform

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CF01 Termination of patent right due to non-payment of annual fee
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Granted publication date: 20100303

Termination date: 20170531