CN113985139A - Frequency domain dielectric response measuring device and method for valve side sleeve of converter transformer - Google Patents
Frequency domain dielectric response measuring device and method for valve side sleeve of converter transformer Download PDFInfo
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- G01R27/2694—Measuring dielectric loss, e.g. loss angle, loss factor or power factor
Abstract
The invention provides a frequency domain dielectric response measuring system of a converter transformer valve side sleeve, which comprises a temperature control module and a high-voltage frequency domain dielectric response measuring module, wherein the high-voltage frequency domain dielectric response measuring module comprises a signal output and acquisition unit, a signal amplification unit and a signal monitoring and analyzing unit, and can realize the measurement of the high-voltage frequency domain dielectric response under wide-range temperature variation and easily perform measurement under a complex field environment.
Description
Technical Field
The invention belongs to the field of frequency domain dielectric property analysis and insulation state evaluation of a side sleeve of a converter transformer valve. In particular to a frequency domain dielectric response measuring device and a frequency domain dielectric response measuring method for a converter transformer valve side sleeve.
Background
In recent years, the super-high voltage direct current transmission project in China is rapidly developed. The converter transformer is core equipment of an ultra-high voltage direct current transmission project and plays a role in electric energy conversion and transmission. The converter transformer sleeve serves as converter transformer valve side wire outlet equipment and plays important roles of leading current out of the converter transformer, insulating support and the like. In the long-term operation of the converter transformer, the valve side sleeve of the converter transformer is affected by factors such as electrical stress, thermal stress, mechanical stress and pressure to cause gradual deterioration of the insulation performance, and the serious deterioration can cause the tail of the valve side sleeve of the converter transformer to have faults such as explosion, fire and the like, thereby seriously threatening the safe and stable operation of the converter transformer and a valve hall. Therefore, the insulation state detection and evaluation can be effectively carried out on the valve side sleeve of the converter transformer in time, and the method has important significance for ensuring the reliable operation of the converter transformer and a power system.
Frequency domain dielectric spectroscopy is a non-destructive inspection technique that reflects the dielectric insulating state based on the dielectric's internal polarization behavior and electrical conductivity characteristics. Researchers at home and abroad carry out more research work on the diagnosis and evaluation of the insulation state of the sleeve by applying a frequency domain dielectric spectrum technology. In the domestic aspect: the influence of moisture on the insulation state of a 10kV oiled paper capacitor type bushing is researched by utilizing a frequency domain dielectric spectrum technology with the effective value of measurement voltage of 140V at room temperature, the research result shows that the main insulation dielectric loss and the capacitance value of the bushing are increased along with the increase of the moisture content, and the specific capacitance characteristic quantity under the frequency of 10-3Hz can effectively evaluate the insulation state of the bushing. The uniform and non-uniform moisture-affected oil paper insulation and the 110kV transformer bushing at the field environment temperature are tested by a frequency domain dielectric spectrum technology with a voltage effective value of 140V at room temperature, research shows that the non-uniform moisture-affected oil paper insulation has a significant loss peak, and the moisture model is proved to be suitable for evaluating the moisture state of the field transformer bushing. The method comprises the following steps that a frequency domain dielectric spectrum technology with the voltage effective value of 140V is adopted to carry out insulation state testing on a 500kV sleeve pipe in Panshicheng of southern power grid companies and the like at the field environment temperature, and research results show that the middle frequency band and the low frequency band of the frequency domain dielectric spectrum can respectively and effectively diagnose the aging defect and the moisture defect of the transformer sleeve pipe. In foreign aspects: the frequency domain dielectric spectrum technology with effective values of 140V and 1400V of measured voltage is adopted to test the transformer bushing in the field environment by Diego M.Robalino and the like in the United states, and research shows that a bushing frequency domain dielectric response measurement curve under the 140V measured voltage has larger fluctuation in a low frequency region under the electromagnetic noise interference, but the bushing frequency domain dielectric response curve is hardly interfered under the 1400V measured voltage. The frequency domain dielectric spectrum technology with the effective value of the measured voltage of 140V is adopted by Sumereder C and the like in Australia to test new and aged high-voltage bushings at room temperature, and researches show that the frequency domain dielectric spectrum curves of the high-voltage bushings in different aging states have larger difference in a low-frequency region, and the dielectric loss value of the bushings is increased due to moisture.
At present, the existing achievement is mainly to detect and analyze the insulation state of the transformer bushing by adopting a 140V low-voltage frequency domain dielectric spectrum technology with an effective value at ambient temperature. At present, the following defects exist in the detection and analysis of the insulation state of a transformer bushing by adopting a frequency domain dielectric spectrum technology: (1) when the operation and maintenance of the converter transformer bushing are carried out on site, maintenance personnel need to master the conditions of temperature, humidity and the like to determine when to carry out maintenance, and certain trouble is caused to the working personnel. Meanwhile, the frequency domain dielectric spectrum result is greatly influenced by factors such as the temperature difference between the inside and the outside of the converter transformer sleeve and the oil tank, the environmental humidity and the like, and the effective detection and evaluation of the insulation state of the converter transformer sleeve are difficult to realize smoothly. (2) The existing frequency domain dielectric spectrum technology has the defects of low measurement voltage and weak current signals, and the test result is easily interfered by factors such as electromagnetic noise and the like, so that the internal defects of the converter transformer sleeve are difficult to characterize, and the insulation state of the converter transformer sleeve is difficult to diagnose and evaluate.
Disclosure of Invention
The invention aims to provide a method for realizing wide temperature and humidity ranges of a converter transformer valve side sleeve core body and an insulating sheath and a method for realizing the wide temperature range of the tail part of a valve side sleeve in insulating oil, which can simulate the temperature difference distribution and humidity adjustment when the valve side sleeve runs; the frequency domain dielectric response measurement method of the transformer valve side sleeve under wide temperature range, wide humidity range and high voltage is improved, and electromagnetic signal interference resistance is improved. So as to overcome the defects of the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that
A frequency domain dielectric response measurement system of a converter transformer valve side sleeve is characterized in that: the measurement system comprises a temperature control module and a high-voltage frequency domain dielectric response measurement module, wherein:
the temperature control module is used for controlling the temperature and the humidity in the system;
the high-voltage frequency domain dielectric response measuring module comprises a signal output unit, a signal amplifying unit, a signal collecting unit and a signal monitoring and analyzing unit:
the signal output unit is used for outputting alternating voltage excitation signals with different frequencies;
the signal amplification unit is used for amplifying the alternating voltage excitation signal, applying the amplified alternating voltage excitation signal to an object to be detected and sending the amplified alternating voltage excitation signal to the signal monitoring and analyzing unit;
the signal acquisition unit is used for measuring alternating current response current which appears after the amplified alternating voltage excitation signal is applied to the object to be measured;
the signal monitoring and analyzing unit is used for acquiring a voltage value and a voltage phase of the received amplified alternating voltage excitation signal, acquiring a current value and a current phase generated by the object to be detected, and acquiring high-voltage frequency domain dielectric response data according to the acquired voltage value, voltage phase, current value and current phase;
the high-voltage frequency domain dielectric response measurement module is arranged beside the converter transformer valve side sleeve, the high-voltage frequency domain dielectric response measurement module outputs an alternating voltage excitation signal to the converter transformer valve side sleeve, the converter transformer valve side sleeve outputs an alternating response current signal which appears after high voltage excitation is applied to the high-voltage frequency domain dielectric response measurement module, and the high-voltage frequency domain dielectric response measurement module is used for realizing high-voltage frequency domain dielectric response measurement under wide-range variable temperature.
The temperature control module comprises a spiral tube type heater, a temperature sensor, a humidity control device, a humidity sensor and a transparent temperature control cover unit,
the solenoid heater and the temperature sensor: the temperature control device is used for setting the temperature range in the transparent temperature control cover unit within a set range;
the humidity control device and the humidity sensor: the humidity control device is used for controlling the humidity in the transparent temperature control cover unit within a set range;
the transparent temperature control cover unit: the tube core and the outer part of the insulating sheath of the converter transformer valve side sleeve are completely covered in the transparent temperature control cover unit, and the transparent temperature control cover unit is used for controlling the external environment temperature of the converter transformer valve side sleeve;
and a spiral tube type heater is arranged in the oil tank of the converter transformer valve side sleeve.
The temperature range is set between 25 ℃ and 80 ℃, and the humidity is controlled between 1% and 70%.
The high voltage frequency domain dielectric response measurement module comprises:
signal output and acquisition unit: the device comprises a signal output unit, a signal acquisition unit, a signal processing unit and a control unit, wherein the signal output unit is used for outputting a stable voltage signal and acquiring a denoising current function, the signal output unit outputs alternating voltage excitation signals with different frequencies, the signal acquisition unit measures alternating response current appearing after a sleeve on the valve side is excited by applying high voltage, and the signal output and acquisition unit comprises a switching power supply, a filter capacitor, a micro-current preamplifier and a current meter;
the signal amplifying unit and the signal monitoring and analyzing unit: the signal amplification unit amplifies the tiny voltage signal provided by the signal output unit by using a high-voltage amplifier, and applies the amplified voltage signal to the tested sample module and the signal monitoring and analyzing unit, wherein the amplification factor of the high-voltage amplifier is calculated according to a measured high voltage value to be applied and a small signal output voltage value, and the range of the applied measured high voltage is 1kV-20 kV; the signal monitoring and analyzing unit: the device comprises a voltage divider, a standard capacitor and an oscilloscope, wherein the signal monitoring and analyzing unit is used for collecting and processing the numerical value and the phase of a high-voltage excitation signal applied to a tested valve side sleeve and the numerical value and the phase of a response current generated by the valve side sleeve; and calculating complex capacitance and dielectric loss of the acquired voltage signals and current signals to obtain high-voltage frequency domain dielectric response data.
The invention also provides a measuring method of the frequency domain dielectric response measuring system by utilizing the converter transformer valve side sleeve, which comprises the following steps:
arranging a temperature control module at the position of a converter transformer valve side sleeve body and an oil tank, and setting the temperature of the temperature control module to be required temperature;
a signal output unit in the high-voltage frequency domain dielectric response measurement module outputs alternating voltage excitation signals with different frequencies;
the signal amplification unit amplifies the alternating voltage excitation signal, applies the amplified alternating voltage excitation signal to an object to be detected, and sends the amplified alternating voltage excitation signal to the signal monitoring and analyzing unit;
the signal acquisition unit measures alternating current response current which appears after the amplified alternating voltage excitation signal is applied to the object to be detected;
and the signal monitoring and analyzing unit acquires the voltage value and the voltage phase of the received amplified alternating voltage excitation signal, acquires the current value and the current phase generated by the object to be detected, and acquires the dielectric response data of the high-voltage frequency domain according to the acquired voltage value, voltage phase, current value and current phase.
According to the voltage value and the voltage phase, and the current value and the current phase, obtain high-voltage frequency domain dielectric response data, specifically include:
and calculating complex capacitance and dielectric loss of the acquired voltage value and voltage phase, and the current value and current phase to obtain high-voltage frequency domain dielectric response data.
The invention has the beneficial effects that:
in the long-term operation process, the valve side sleeve of the converter transformer is affected by factors such as electrical stress, thermal stress and pressure to cause the gradual deterioration of the insulation performance of the valve side sleeve, and finally, the insulation failure of the valve side sleeve of the converter transformer can be caused, and even serious accidents such as explosion, fire and the like can occur. The invention provides a system capable of realizing frequency domain dielectric response measurement of a sleeve on the side of a converter transformer valve under wide temperature, wide humidity range and high voltage. The measuring system can keep the temperature and humidity inside and outside the transformer side sleeve core and the insulating sheath consistent, and can also realize the wide temperature range control of the tail part of the valve side sleeve in the insulating oil. Meanwhile, a method for measuring the high-voltage frequency domain dielectric response is provided, the frequency domain dielectric response measurement of the sleeve on the converter transformer valve side under higher voltage is realized, the measurement current signal is effectively enhanced, the anti-electromagnetic signal interference capability is improved, and more insulation defect information in the sleeve on the converter transformer valve side can be found. The method provides a feasible technical means for realizing accurate and effective diagnosis and evaluation of the insulation state of the side sleeve of the ultra-high voltage large-size converter transformer valve, and provides technical support for safe and reliable operation of the side sleeve of the converter transformer valve.
Drawings
FIG. 1 is a schematic diagram of a converter transformer valve side bushing model according to the present invention;
FIG. 2 is a schematic diagram of a temperature control module of a valve-side sleeve of a converter transformer according to the present invention;
FIG. 3 is a schematic diagram of a high voltage frequency domain dielectric response measurement system of the present invention;
FIG. 4 is a schematic diagram of the system of the present invention.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
the invention provides a frequency domain dielectric response measuring system (as shown in figure 4) of a converter transformer valve side sleeve, has the advantages of wide-range adjustment of measured temperature and strong anti-electromagnetic interference capability, and provides an effective detection means for insulation detection of an ultra-high voltage large-size converter transformer valve side sleeve.
The frequency domain dielectric response measuring system of the converter transformer valve side sleeve comprises a measured sample module, a temperature control module and a high-voltage frequency domain dielectric response measuring module. The high-voltage frequency domain dielectric response measurement module comprises a signal output and acquisition unit, a signal amplification unit and a signal monitoring and analyzing unit, can realize high-voltage frequency domain dielectric response measurement under wide-range temperature variation, and is easy to carry out measurement under a complex field environment.
In the above technical solution, the measured sample module is a converter transformer valve side bushing, as shown in fig. 1.
In the above technical solution, the temperature control module includes a solenoid heater, a temperature sensor, a humidity control device, a humidity sensor and a transparent temperature control cover unit, as shown in fig. 2. The function of the spiral tube heater and the temperature sensor is to set the temperature control range between 25 ℃ and 80 ℃. The humidity control device and the humidity sensor are used for controlling the humidity of the valve side sleeve core and the humidity of the outer part of the insulating sheath to be between 1% and 70%. The transparent temperature control cover is used for controlling the external environment temperature of the sleeve at the side of the converter transformer valve. The spiral tube type heater is directly arranged in the oil tank to realize the temperature changing function of the tail part of the valve side sleeve in the insulating oil.
In the above technical solution, a high voltage frequency domain dielectric response measurement system diagram is shown in fig. 3: the high voltage frequency domain dielectric response measurement system comprises:
1) signal output and acquisition unit: the unit comprises a switching power supply, a filter capacitor, a micro-current preamplifier, an ammeter and the like, can realize the functions of outputting a stable voltage signal, collecting de-noising current and the like, and has the advantages of high measurement precision and strong anti-interference capability. The signal output unit is used for outputting alternating voltage excitation signals with different frequencies. The acquisition unit is used for measuring alternating current response current appearing after the valve side sleeve is excited by applying high voltage.
2) A signal amplification unit: the system utilizes a high-voltage amplifier to amplify a tiny voltage signal provided by a signal output unit, the amplified voltage signal is applied to a tested sample module and a signal monitoring and analyzing unit, the amplification factor of the high-voltage amplifier is calculated according to a to-be-applied measurement high-voltage value and a small-signal output voltage value, and the range of the applied measurement high voltage is recommended to be 1kV-20 kV;
3) a signal monitoring and analyzing unit: the device consists of a voltage divider, a standard capacitor and an oscilloscope. Collecting and processing the numerical value and the phase of a high-voltage excitation signal applied to a tested valve side sleeve and the numerical value and the phase of a response current generated by the valve side sleeve; and calculating complex capacitance and dielectric loss of the acquired voltage signals and current signals to obtain high-voltage frequency domain dielectric response data.
The measuring method of the frequency domain dielectric response measuring system utilizing the converter transformer valve side sleeve comprises the following steps:
the method comprises the following steps of firstly, arranging a temperature control module at a converter transformer valve side sleeve body and an oil tank, setting the temperature of the temperature control module to be required, and standing for 30 minutes after the temperature and the humidity meet requirements, so that the temperature and the humidity of the converter transformer valve side sleeve body and the oil tank are stable.
And secondly, assembling the signal output and acquisition unit, the signal amplification unit and the signal detection and analysis unit into a high-voltage frequency domain dielectric response measurement system.
Thirdly, performing frequency domain dielectric response test on the converter transformer valve side sleeve with stable temperature and humidity by adopting a high-voltage frequency domain dielectric response measuring system, and setting the measuring voltage as10kV, and a measurement frequency range of 10-3-102And Hz, obtaining high-voltage frequency domain dielectric response data of the converter transformer valve side sleeve.
And repeating the steps if the frequency domain dielectric response characteristics of the converter transformer valve side sleeve at different temperatures and humidities are required to be obtained.
In summary, in the long-term operation process, the valve-side bushing of the converter transformer is affected by electrical stress, thermal stress, pressure and other factors to cause gradual deterioration of the insulation performance, and finally, the insulation failure of the valve-side bushing of the converter transformer can be caused, and even serious accidents such as explosion and fire can occur. The invention provides a system capable of realizing frequency domain dielectric response measurement of a sleeve on the side of a converter transformer valve under wide temperature, wide humidity range and high voltage. The measuring system can keep the temperature and humidity inside and outside the transformer side sleeve core and the insulating sheath consistent, and can also realize the wide temperature range control of the tail part of the valve side sleeve in the insulating oil. Meanwhile, a method for measuring the high-voltage frequency domain dielectric response is provided, the frequency domain dielectric response measurement of the sleeve on the converter transformer valve side under higher voltage is realized, the measurement current signal is effectively enhanced, the anti-electromagnetic signal interference capability is improved, and more insulation defect information in the sleeve on the converter transformer valve side can be found. The method provides a feasible technical means for realizing accurate and effective diagnosis and evaluation of the insulation state of the side sleeve of the ultra-high voltage large-size converter transformer valve, and provides technical support for safe and reliable operation of the side sleeve of the converter transformer valve.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
Claims (5)
1. A frequency domain dielectric response measurement system of a converter transformer valve side sleeve is characterized in that: the measurement system comprises a temperature control module and a high-voltage frequency domain dielectric response measurement module, wherein:
the temperature control module is used for controlling the temperature and the humidity in the system;
the high-voltage frequency domain dielectric response measuring module comprises a signal output unit, a signal amplifying unit, a signal collecting unit and a signal monitoring and analyzing unit:
the signal output unit is used for outputting alternating voltage excitation signals with different frequencies;
the signal amplification unit is used for amplifying the alternating voltage excitation signal, applying the amplified alternating voltage excitation signal to an object to be detected and sending the amplified alternating voltage excitation signal to the signal monitoring and analyzing unit;
the signal acquisition unit is used for measuring alternating current response current which appears after the amplified alternating voltage excitation signal is applied to the object to be measured;
the signal monitoring and analyzing unit is used for acquiring a voltage value and a voltage phase of the received amplified alternating voltage excitation signal, acquiring a current value and a current phase generated by the object to be detected, and acquiring high-voltage frequency domain dielectric response data according to the acquired voltage value, voltage phase, current value and current phase;
the high-voltage frequency domain dielectric response measurement module is arranged beside the converter transformer valve side sleeve, the high-voltage frequency domain dielectric response measurement module outputs an alternating voltage excitation signal to the converter transformer valve side sleeve, the converter transformer valve side sleeve outputs an alternating response current signal which appears after high voltage excitation is applied to the high-voltage frequency domain dielectric response measurement module, and the high-voltage frequency domain dielectric response measurement module is used for realizing high-voltage frequency domain dielectric response measurement under wide-range variable temperature.
2. The frequency domain dielectric response measurement system of a converter transformer valve side bushing of claim 1, wherein said temperature control module comprises a spiral tube heater, a temperature sensor, a humidity control device, a humidity sensor and a transparent temperature control cover unit,
the solenoid heater and the temperature sensor: the temperature control device is used for setting the temperature range in the transparent temperature control cover unit within a set range;
the humidity control device and the humidity sensor: the humidity control device is used for controlling the humidity in the transparent temperature control cover unit within a set range;
the transparent temperature control cover unit: the tube core and the outer part of the insulating sheath of the converter transformer valve side sleeve are completely covered in the transparent temperature control cover unit, and the transparent temperature control cover unit is used for controlling the external environment temperature of the converter transformer valve side sleeve;
and a spiral tube type heater is arranged in the oil tank of the converter transformer valve side sleeve.
3. The frequency domain dielectric response measurement system of a converter transformer valve side bushing of claim 2, wherein said temperature range is set between 25 ℃ and 80 ℃ and said humidity is controlled between 1% and 70%.
4. The frequency domain dielectric response measurement system of a converter transformer valve side bushing of claim 1, wherein said high voltage frequency domain dielectric response measurement module comprises:
signal output and acquisition unit: the device comprises a signal output unit, a signal acquisition unit, a signal processing unit and a control unit, wherein the signal output unit is used for outputting a stable voltage signal and acquiring a denoising current function, the signal output unit outputs alternating voltage excitation signals with different frequencies, the signal acquisition unit measures alternating response current appearing after a sleeve on the valve side is excited by applying high voltage, and the signal output and acquisition unit comprises a switching power supply, a filter capacitor, a micro-current preamplifier and a current meter;
the signal amplifying unit and the signal monitoring and analyzing unit: the signal amplification unit amplifies the tiny voltage signal provided by the signal output unit by using a high-voltage amplifier, and applies the amplified voltage signal to the tested sample module and the signal monitoring and analyzing unit, wherein the amplification factor of the high-voltage amplifier is calculated according to a measured high voltage value to be applied and a small signal output voltage value, and the range of the applied measured high voltage is 1kV-20 kV; the signal monitoring and analyzing unit: the device comprises a voltage divider, a standard capacitor and an oscilloscope, wherein the signal monitoring and analyzing unit is used for collecting and processing the numerical value and the phase of a high-voltage excitation signal applied to a tested valve side sleeve and the numerical value and the phase of a response current generated by the valve side sleeve; and calculating complex capacitance and dielectric loss of the acquired voltage signals and current signals to obtain high-voltage frequency domain dielectric response data.
5. A measuring method of a frequency domain dielectric response measuring system using a converter transformer valve side bushing according to any of claims 1-4, said measuring method comprising the steps of:
arranging a temperature control module at the position of a converter transformer valve side sleeve body and an oil tank, and setting the temperature of the temperature control module to be required temperature;
a signal output unit in the high-voltage frequency domain dielectric response measurement module outputs alternating voltage excitation signals with different frequencies;
the signal amplification unit amplifies the alternating voltage excitation signal, applies the amplified alternating voltage excitation signal to an object to be detected, and sends the amplified alternating voltage excitation signal to the signal monitoring and analyzing unit;
the signal acquisition unit measures alternating current response current which appears after the amplified alternating voltage excitation signal is applied to the object to be detected;
and the signal monitoring and analyzing unit acquires the voltage value and the voltage phase of the received amplified alternating voltage excitation signal, acquires the current value and the current phase generated by the object to be detected, and acquires the dielectric response data of the high-voltage frequency domain according to the acquired voltage value, voltage phase, current value and current phase.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117434407A (en) * | 2023-12-20 | 2024-01-23 | 南京中鑫智电科技有限公司 | Time-frequency domain feature fusion converter transformer valve side sleeve insulation analysis method and system |
| CN117639282B (en) * | 2024-01-26 | 2024-04-19 | 南京中鑫智电科技有限公司 | Converter transformer valve side sleeve end screen voltage divider frequency domain response processing method and system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2487495A1 (en) * | 2011-02-14 | 2012-08-15 | Omicron electronics GmbH | Method and device for measuring a dielectric response from an electrical insulation system |
| CN104730343A (en) * | 2015-03-18 | 2015-06-24 | 中电科技电子信息系统有限公司 | High voltage electricity capacitive equipment dielectric loss on-line monitoring method and monitoring system |
| CN110196356A (en) * | 2019-05-17 | 2019-09-03 | 国网陕西省电力公司电力科学研究院 | Passive type dielectric spectroscopy on-line measurement analysis system and method |
| CN111208397A (en) * | 2020-02-28 | 2020-05-29 | 重庆大学 | System and method for measuring high-voltage time/frequency domain dielectric response characteristics of power equipment |
| CN112305319A (en) * | 2020-12-24 | 2021-02-02 | 中国电力科学研究院有限公司 | Method and system for online monitoring of converter transformer valve side sleeve parameters |
| CN112505493A (en) * | 2020-10-30 | 2021-03-16 | 西安交通大学 | Transformer bushing dielectric response measuring method and system |
| CN213875870U (en) * | 2020-11-17 | 2021-08-03 | 云南电网有限责任公司普洱供电局 | Medium response analysis system |
-
2021
- 2021-10-15 CN CN202111203311.4A patent/CN113985139A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2487495A1 (en) * | 2011-02-14 | 2012-08-15 | Omicron electronics GmbH | Method and device for measuring a dielectric response from an electrical insulation system |
| CN104730343A (en) * | 2015-03-18 | 2015-06-24 | 中电科技电子信息系统有限公司 | High voltage electricity capacitive equipment dielectric loss on-line monitoring method and monitoring system |
| CN110196356A (en) * | 2019-05-17 | 2019-09-03 | 国网陕西省电力公司电力科学研究院 | Passive type dielectric spectroscopy on-line measurement analysis system and method |
| CN111208397A (en) * | 2020-02-28 | 2020-05-29 | 重庆大学 | System and method for measuring high-voltage time/frequency domain dielectric response characteristics of power equipment |
| CN112505493A (en) * | 2020-10-30 | 2021-03-16 | 西安交通大学 | Transformer bushing dielectric response measuring method and system |
| CN213875870U (en) * | 2020-11-17 | 2021-08-03 | 云南电网有限责任公司普洱供电局 | Medium response analysis system |
| CN112305319A (en) * | 2020-12-24 | 2021-02-02 | 中国电力科学研究院有限公司 | Method and system for online monitoring of converter transformer valve side sleeve parameters |
Non-Patent Citations (1)
| Title |
|---|
| 张书琦;李金忠;汪可;董明;王丽;: "温度特征参数提取及其对油纸绝缘频域谱的影响研究", 绝缘材料, no. 05, 31 May 2017 (2017-05-31), pages 1 - 3 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117434407A (en) * | 2023-12-20 | 2024-01-23 | 南京中鑫智电科技有限公司 | Time-frequency domain feature fusion converter transformer valve side sleeve insulation analysis method and system |
| CN117434407B (en) * | 2023-12-20 | 2024-02-20 | 南京中鑫智电科技有限公司 | Time-frequency domain feature fusion converter transformer valve side sleeve insulation analysis method and system |
| CN117639282B (en) * | 2024-01-26 | 2024-04-19 | 南京中鑫智电科技有限公司 | Converter transformer valve side sleeve end screen voltage divider frequency domain response processing method and system |
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