CN114325497A - Multi-parameter high-voltage bushing on-line monitoring device - Google Patents
Multi-parameter high-voltage bushing on-line monitoring device Download PDFInfo
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- CN114325497A CN114325497A CN202111612532.7A CN202111612532A CN114325497A CN 114325497 A CN114325497 A CN 114325497A CN 202111612532 A CN202111612532 A CN 202111612532A CN 114325497 A CN114325497 A CN 114325497A
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Abstract
The invention discloses a multi-parameter high-voltage bushing online monitoring device, which comprises a bushing adapter and a four-in-one bushing oil state sensor, wherein the bushing adapter and the four-in-one bushing oil state sensor are connected with a bushing state acquisition unit; the sleeve adapter is used for monitoring leakage current of the sleeve capacitor and a sleeve capacitor high-frequency pulse local discharge current signal to ground; the four-in-one sleeve oil state sensor is used for monitoring signals of temperature, pressure, micro water and hydrogen content of insulating oil in the sleeve; the casing pipe state acquisition unit is used for acquiring signals monitored by the casing pipe adapter and the four-in-one casing pipe oil state sensor; and the analysis processing unit is used for diagnosing and prejudging various faults inside the casing pipe based on the signals acquired by the casing pipe state acquisition unit and based on the multi-state quantity. The invention monitors the high-voltage bushing based on the multi-state quantity, comprehensively analyzes and diagnoses the bushing faults, can accurately and timely find various faults of the bushing, timely warns and intervenes, and avoids further expansion of accidents.
Description
Technical Field
The invention belongs to the technical field of high-voltage equipment, and particularly relates to an online monitoring device for a multi-parameter high-voltage bushing.
Background
The transformer is the core equipment of transformer substation, and the stable operation of transformer directly relates to the stability of transformer substation and electric wire netting. If the high-low voltage side sleeve of the transformer has defects or faults, the safe operation of the transformer and the power supply reliability of the transformer are directly endangered.
In the statistics of transformer faults, the transformer bushing is the position with the most faults and accounts for 29 percent of the total number of the transformer faults.
For many years, testing of bushings has meant that it is common to shut down the transformer, closely inspect the bushing for cracks or defects, monitor internal oil levels, measure the capacitance or power factor of the bushing itself, and the like. The method of detecting when the transformer is out of operation is impractical, so that the detection is performed once in a few years for the minimum period, and serious faults may occur in the detection interval.
The conventional occasionally-applied casing dielectric loss on-line monitoring is also not popularized due to the reasons that the monitoring principle is single, the influence of factors such as environment is easy, the inaccurate false alarm rate of monitoring is high and the like.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an online monitoring device for a multi-parameter high-voltage bushing, aiming at the defects of the prior art, so that the working state of the internal capacitance and the internal insulating oil of the high-voltage bushing can be comprehensively monitored in multiple dimensions, and the working state of the bushing can be completely and comprehensively reflected; meanwhile, various faults inside the casing are comprehensively and reliably diagnosed and prejudged based on a multi-state quantity analysis and diagnosis algorithm.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a multi-parameter high-voltage bushing online monitoring device comprises a bushing adapter, a four-in-one bushing oil state sensor, a bushing state acquisition unit and an analysis processing unit;
the sleeve adapter and the four-in-one sleeve oil state sensor are connected with the sleeve state acquisition unit;
the sleeve adapter is used for monitoring leakage current of the sleeve capacitor and a high-frequency pulse-to-ground local discharge current signal of the sleeve capacitor;
the four-in-one sleeve oil state sensor is used for monitoring signals of temperature, pressure, micro water and hydrogen content of insulating oil in the sleeve;
the casing state acquisition unit is used for acquiring signals monitored by the casing adapter and the four-in-one casing oil state sensor;
and the analysis processing unit is used for diagnosing and prejudging various faults in the casing pipe based on the signals acquired by the casing pipe state acquisition unit and based on the multi-state quantity.
In order to optimize the technical scheme, the specific measures adopted further comprise:
the sleeve adapter and the sleeve state acquisition unit are connected by a signal cable.
The four-in-one casing oil state sensor is connected with the casing state acquisition unit through an RS485 communication line, and monitored signals of the insulating oil state in the casing are transmitted to the casing state acquisition unit.
The sleeve adapter comprises a zero magnetic flux transformer and a high-frequency pulse partial discharge sensor;
a sleeve tap grounding wire penetrates through the zero-flux mutual inductor and the high-frequency pulse partial discharge sensor coil;
and secondary side signal lines of the zero magnetic flux mutual inductor and the high-frequency pulse partial discharge sensor are connected with the sleeve state acquisition unit.
The zero magnetic flux transformer is used for monitoring power frequency leakage current of the sleeve capacitor;
the high-frequency pulse partial discharge sensor is used for monitoring the sleeve capacitor high-frequency pulse-to-ground partial discharge current with the bandwidth of 3M-30 MHz.
A plurality of sensors are arranged in the four-in-one sleeve oil state sensor and are respectively used for monitoring signals of temperature, pressure, micro water and hydrogen content of insulating oil in the sleeve, and a processor is arranged in the four-in-one sleeve oil state sensor to realize on-site collection of the oil state of the sleeve.
The analysis processing unit is configured to diagnose and predict various faults inside the casing based on the signals acquired by the casing state acquisition unit and based on the multi-state quantities, and specifically includes:
diagnosing and pre-judging a bushing end screen grounding fault according to the insulating oil temperature and the bushing capacitance high-frequency pulse to ground partial discharge current;
diagnosing and pre-judging the air inlet fault of the sleeve according to the pressure of insulating oil and micro water;
diagnosing and prejudging the aging of the damp insulating layer of the sleeve according to the insulating oil micro water, the insulating oil temperature, the sleeve capacitance value, the sleeve dielectric loss value and the sleeve capacitance leakage current;
diagnosing and pre-judging the partial discharge fault of the suspension discharge of the sleeve according to the high-frequency pulse of the hydrogen content of the insulating oil, the pressure of the insulating oil and the capacitance of the sleeve;
and diagnosing and pre-judging the breakdown partial discharge fault between the sleeve screens according to the hydrogen content of the insulating oil, the pressure of the insulating oil, the capacitance value of the sleeve, the dielectric loss value of the sleeve, the leakage current of the sleeve capacitor and the high-frequency pulse of the sleeve capacitor.
The invention has the following beneficial effects:
1. the invention can realize the on-line monitoring of the high-voltage bushing, has short detection period and reduces the possibility of missed detection;
2. the high-voltage bushing is comprehensively monitored from eight state quantities, namely the temperature, the pressure, the micro-water content and the hydrogen content of the internal insulating oil and leakage current, dielectric loss, capacitance, partial discharge and the like of the bushing capacitor, and the working state of the high-voltage bushing can be accurately and timely reflected;
3. the invention carries out comprehensive analysis and diagnosis on the casing pipe faults based on the monitoring of a multi-state quantity and multi-principle, can accurately and timely find various faults of the casing pipe, timely early-warning and intervene, and avoids further expansion of accidents.
Drawings
FIG. 1 is a view showing the construction of an apparatus according to the present invention;
FIG. 2 is a multi-state-quantity based casing fault diagnosis and prognosis chart of the present invention.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
Referring to fig. 1, the multi-parameter high-voltage bushing online monitoring device comprises a bushing adapter, a four-in-one bushing oil state sensor, a bushing state acquisition unit and an analysis processing unit;
the sleeve adapter and the four-in-one sleeve oil state sensor are connected with the sleeve state acquisition unit;
the sleeve adapter is used for monitoring leakage current of the sleeve capacitor and a high-frequency pulse-to-ground local discharge current signal of the sleeve capacitor;
the four-in-one sleeve oil state sensor is used for monitoring signals of temperature, pressure, micro water and hydrogen content of insulating oil in the sleeve;
the casing state acquisition unit is used for acquiring signals monitored by the casing adapter and the four-in-one casing oil state sensor;
and the analysis processing unit is used for diagnosing and prejudging various faults in the casing pipe based on the signals acquired by the casing pipe state acquisition unit and based on the multi-state quantity.
In an embodiment, the casing adapter and the casing state acquisition unit are connected by a signal cable.
In an embodiment, the four-in-one casing oil state sensor is connected with the casing state acquisition unit through an RS485 communication line, and monitored signals of the state of the insulating oil inside the casing are transmitted to the casing state acquisition unit.
In an embodiment, the sleeve adapter comprises a zero-flux transformer and a high-frequency pulse partial discharge sensor;
a sleeve tap grounding wire penetrates through the zero-flux mutual inductor and the high-frequency pulse partial discharge sensor coil;
and secondary side signal lines of the zero magnetic flux mutual inductor and the high-frequency pulse partial discharge sensor are connected with the sleeve state acquisition unit.
In the embodiment, the zero magnetic flux transformer is used for monitoring the power frequency leakage small current of the sleeve capacitor;
the high-frequency pulse partial discharge sensor is used for monitoring the sleeve capacitor high-frequency pulse-to-ground partial discharge current with the bandwidth of 3M-30 MHz.
In the embodiment, a plurality of sensors are arranged in the four-in-one sleeve oil state sensor and are respectively used for monitoring signals of temperature, pressure, micro water and hydrogen content of insulating oil in the sleeve, and a processor is arranged in the four-in-one sleeve oil state sensor to realize on-site collection of the sleeve oil state.
Referring to fig. 2, in an embodiment, the analysis processing unit is configured to diagnose and predict various faults inside the casing based on the signals acquired by the casing state acquisition unit and based on the multi-state quantities, and specifically includes:
diagnosing and pre-judging a bushing end screen grounding fault according to the insulating oil temperature and the bushing capacitance high-frequency pulse to ground partial discharge current;
diagnosing and pre-judging the air inlet fault of the sleeve according to the pressure of insulating oil and micro water;
diagnosing and prejudging the aging of the damp insulating layer of the sleeve according to the insulating oil micro water, the insulating oil temperature, the sleeve capacitance value, the sleeve dielectric loss value and the sleeve capacitance leakage current;
diagnosing and pre-judging the partial discharge fault of the suspension discharge of the sleeve according to the high-frequency pulse of the hydrogen content of the insulating oil, the pressure of the insulating oil and the capacitance of the sleeve;
and diagnosing and pre-judging the breakdown partial discharge fault between the sleeve screens according to the hydrogen content of the insulating oil, the pressure of the insulating oil, the capacitance value of the sleeve, the dielectric loss value of the sleeve, the leakage current of the sleeve capacitor and the high-frequency pulse of the sleeve capacitor.
For example: when the partial discharge breakdown fault occurs between the capacitive screens, hydrogen can be generated, the internal pressure of the sleeve can be increased due to the generation of the hydrogen, high-frequency pulse current to the ground can be generated at the same time, and the capacitance and dielectric loss value of the sleeve can be changed due to the breakdown between the screens. Therefore, the comprehensive monitoring of hydrogen, partial discharge, pressure, sleeve capacitance and dielectric loss value can realize the timely discovery of sleeve faults and the comprehensive judgment of fault cause positioning
1. The invention provides a multi-parameter casing pipe state monitoring solution;
2. the comprehensive online monitoring of the running state of the casing is realized through the invention;
3. the invention realizes the comprehensive diagnosis algorithm of the running state of the casing based on multiple parameters, and can effectively identify various faults of the casing. The reliability of the fault diagnosis of the casing is greatly improved through mutual verification of various principles.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may be made by those skilled in the art without departing from the principle of the invention.
Claims (7)
1. A multi-parameter high-voltage bushing online monitoring device is characterized by comprising a bushing adapter, a four-in-one bushing oil state sensor, a bushing state acquisition unit and an analysis processing unit;
the sleeve adapter and the four-in-one sleeve oil state sensor are connected with the sleeve state acquisition unit;
the sleeve adapter is used for monitoring leakage current of the sleeve capacitor and a high-frequency pulse-to-ground local discharge current signal of the sleeve capacitor;
the four-in-one sleeve oil state sensor is used for monitoring signals of temperature, pressure, micro water and hydrogen content of insulating oil in the sleeve;
the casing state acquisition unit is used for acquiring signals monitored by the casing adapter and the four-in-one casing oil state sensor;
and the analysis processing unit is used for diagnosing and prejudging various faults in the casing pipe based on the signals acquired by the casing pipe state acquisition unit and based on the multi-state quantity.
2. The on-line monitoring device for the multi-parameter high voltage bushing as claimed in claim 1, wherein the bushing adaptor is connected to the bushing status collecting unit via a signal cable.
3. The on-line monitoring device for the multi-parameter high-voltage bushing of claim 1, wherein the four-in-one bushing oil state sensor is connected with the bushing state acquisition unit through an RS485 communication line, and transmits the monitored signal of the state of the insulating oil inside the bushing to the bushing state acquisition unit.
4. The on-line monitoring device for a multi-parameter high voltage bushing of claim 1, wherein said bushing adaptor includes a zero flux transformer, a high frequency pulse partial discharge sensor;
a sleeve tap grounding wire penetrates through the zero-flux mutual inductor and the high-frequency pulse partial discharge sensor coil;
and secondary side signal lines of the zero magnetic flux mutual inductor and the high-frequency pulse partial discharge sensor are connected with the sleeve state acquisition unit.
5. The on-line monitoring device for the multi-parameter high-voltage bushing of claim 1, wherein the zero flux transformer is used for monitoring a power frequency leakage current of a bushing capacitor;
the high-frequency pulse partial discharge sensor is used for monitoring the sleeve capacitor high-frequency pulse-to-ground partial discharge current with the bandwidth of 3M-30 MHz.
6. The on-line monitoring device for the multi-parameter high-voltage bushing as claimed in claim 1, wherein a plurality of sensors are built in the four-in-one bushing oil state sensor and are respectively used for monitoring signals of temperature, pressure, micro water and hydrogen content of insulating oil in the bushing, and a processor is built in the four-in-one bushing oil state sensor to realize on-site collection of the bushing oil state.
7. The on-line monitoring device for the multi-parameter high-voltage bushing as claimed in claim 1, wherein the analyzing and processing unit is configured to diagnose and predict various faults inside the bushing based on the signals collected by the bushing state collecting unit and based on the multi-state quantities, and specifically comprises:
diagnosing and pre-judging a bushing end screen grounding fault according to the insulating oil temperature and the bushing capacitance high-frequency pulse to ground partial discharge current;
diagnosing and pre-judging the air inlet fault of the sleeve according to the pressure of insulating oil and micro water;
diagnosing and prejudging the aging of the damp insulating layer of the sleeve according to the insulating oil micro water, the insulating oil temperature, the sleeve capacitance value, the sleeve dielectric loss value and the sleeve capacitance leakage current;
diagnosing and pre-judging the partial discharge fault of the suspension discharge of the sleeve according to the high-frequency pulse of the hydrogen content of the insulating oil, the pressure of the insulating oil and the capacitance of the sleeve;
and diagnosing and pre-judging the breakdown partial discharge fault between the sleeve screens according to the hydrogen content of the insulating oil, the pressure of the insulating oil, the capacitance value of the sleeve, the dielectric loss value of the sleeve, the leakage current of the sleeve capacitor and the high-frequency pulse of the sleeve capacitor.
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| CN202111612532.7A CN114325497A (en) | 2021-12-27 | 2021-12-27 | Multi-parameter high-voltage bushing on-line monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115063049A (en) * | 2022-08-16 | 2022-09-16 | 山东和兑智能科技有限公司 | High-voltage bushing multidimensional state monitoring system and method based on micro intelligent sensor |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291122A (en) * | 2016-08-04 | 2017-01-04 | 广东电网有限责任公司电力科学研究院 | The method of testing of a kind of oil immersed type condenser bushing watered and wetting defect and system |
| CN108152653A (en) * | 2017-12-29 | 2018-06-12 | 国网山东省电力公司日照供电公司 | Transformer fault monitoring device and system |
| CN109188104A (en) * | 2018-10-12 | 2019-01-11 | 国网陕西省电力公司电力科学研究院 | The dielectric response of paper oil insulation casing not blackouts monitoring system and method |
| CN109633396A (en) * | 2019-01-29 | 2019-04-16 | 武汉思融科技有限公司 | A kind of apparatus insulated defect on-line monitoring system of the few oil of electric power and method |
| CN110906973A (en) * | 2019-10-28 | 2020-03-24 | 国家电网有限公司 | System and method for monitoring oil-immersed power element |
| CN111239650A (en) * | 2020-02-13 | 2020-06-05 | 南京工程学院 | Method and system for monitoring internal moisture of oiled paper capacitive transformer bushing |
| US20200191763A1 (en) * | 2018-12-12 | 2020-06-18 | ZTZ Service International, Inc. | System and method for headspace monitoring in transformers |
| WO2020125090A1 (en) * | 2018-12-20 | 2020-06-25 | 国网上海市电力公司 | Transformer monitoring system and method |
| CN111999685A (en) * | 2020-09-18 | 2020-11-27 | 山东电工电气集团有限公司 | Transformer oil-immersed bushing running state integrated monitoring system |
| CN113109674A (en) * | 2021-04-01 | 2021-07-13 | 西安交通大学 | Monitoring method, device, equipment, system and storage medium of transformer bushing |
-
2021
- 2021-12-27 CN CN202111612532.7A patent/CN114325497A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291122A (en) * | 2016-08-04 | 2017-01-04 | 广东电网有限责任公司电力科学研究院 | The method of testing of a kind of oil immersed type condenser bushing watered and wetting defect and system |
| CN108152653A (en) * | 2017-12-29 | 2018-06-12 | 国网山东省电力公司日照供电公司 | Transformer fault monitoring device and system |
| CN109188104A (en) * | 2018-10-12 | 2019-01-11 | 国网陕西省电力公司电力科学研究院 | The dielectric response of paper oil insulation casing not blackouts monitoring system and method |
| US20200191763A1 (en) * | 2018-12-12 | 2020-06-18 | ZTZ Service International, Inc. | System and method for headspace monitoring in transformers |
| WO2020125090A1 (en) * | 2018-12-20 | 2020-06-25 | 国网上海市电力公司 | Transformer monitoring system and method |
| CN109633396A (en) * | 2019-01-29 | 2019-04-16 | 武汉思融科技有限公司 | A kind of apparatus insulated defect on-line monitoring system of the few oil of electric power and method |
| CN110906973A (en) * | 2019-10-28 | 2020-03-24 | 国家电网有限公司 | System and method for monitoring oil-immersed power element |
| CN111239650A (en) * | 2020-02-13 | 2020-06-05 | 南京工程学院 | Method and system for monitoring internal moisture of oiled paper capacitive transformer bushing |
| CN111999685A (en) * | 2020-09-18 | 2020-11-27 | 山东电工电气集团有限公司 | Transformer oil-immersed bushing running state integrated monitoring system |
| CN113109674A (en) * | 2021-04-01 | 2021-07-13 | 西安交通大学 | Monitoring method, device, equipment, system and storage medium of transformer bushing |
Non-Patent Citations (1)
| Title |
|---|
| 王培章 等: "微波射频技术电路设计与分析", vol. 978, 中国计量出版社, pages: 109 - 115 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115063049A (en) * | 2022-08-16 | 2022-09-16 | 山东和兑智能科技有限公司 | High-voltage bushing multidimensional state monitoring system and method based on micro intelligent sensor |
| CN115063049B (en) * | 2022-08-16 | 2022-11-15 | 山东和兑智能科技有限公司 | High-voltage bushing multidimensional state monitoring system and method based on micro intelligent sensor |
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