CN204495898U - A kind of transformer superpotential on-line monitoring system - Google Patents
A kind of transformer superpotential on-line monitoring system Download PDFInfo
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- CN204495898U CN204495898U CN201520066688.3U CN201520066688U CN204495898U CN 204495898 U CN204495898 U CN 204495898U CN 201520066688 U CN201520066688 U CN 201520066688U CN 204495898 U CN204495898 U CN 204495898U
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Abstract
Description
技术领域 technical field
本实用新型涉及电力检测技术领域，具体涉及一种变压器过电压在线监测系统。 The utility model relates to the technical field of electric power detection, in particular to an online monitoring system for transformer overvoltage.
背景技术 Background technique
随着国民经济的发展，对电力系统可靠运行的要求越来越高，电力变压器是电网中的关键设备，变压器在运行过程中会遭受各种类型的过电压，对变压器所承受过电压进行检测时研究变压器绝缘特性，进行变压器过电压防护的关键措施。 With the development of the national economy, the requirements for the reliable operation of the power system are getting higher and higher. The power transformer is the key equipment in the power grid. The transformer will suffer from various types of overvoltage during operation, and the overvoltage of the transformer is detected. It is a key measure to study the insulation characteristics of transformers and carry out overvoltage protection of transformers.
现有技术的研究中多通过电容式或电压互感器来对变电站过电压进行检测，这种方法可以有效实现变电站过电压的检测，但难以对变压器本身所承受的过电压进行检测；还有例如通过变压器套管末屏进行过电压检测的方法，但这种方法需要将套管末屏拆开，这样不利于变压器的安全运行；因此，需要研究一种安全可靠的变压器过电压在线监测系统，这对于变压器的安全运行具有重要意义。 In the research of the prior art, the overvoltage of the substation is mostly detected by capacitive type or voltage transformer. This method can effectively realize the detection of the overvoltage of the substation, but it is difficult to detect the overvoltage borne by the transformer itself; The method of overvoltage detection through the end screen of the transformer bushing, but this method needs to disassemble the end screen of the bushing, which is not conducive to the safe operation of the transformer; therefore, it is necessary to study a safe and reliable online monitoring system for transformer overvoltage, This is of great significance to the safe operation of the transformer.
实用新型内容 Utility model content
本实用新型的目的在于提供一种变压器过电压在线监测系统，其能够安全可靠的对变压器过电压进行在线监测。 The purpose of the utility model is to provide a transformer overvoltage online monitoring system, which can safely and reliably monitor the transformer overvoltage online.
为了达到上述目的，本实用新型通过以下技术方案实现： In order to achieve the above object, the utility model is realized through the following technical solutions:
一种变压器过电压在线监测系统，其与变压器连接，其特征是，所述的在线监测系统包含： A transformer overvoltage online monitoring system, which is connected to a transformer, is characterized in that the online monitoring system includes:
中性点连接线，其输入端连接所述变压器的三相中性点； A neutral point connection line, the input end of which is connected to the three-phase neutral point of the transformer;
中性点避雷器，其输入端连接所述中性点连接线的输出端，其输出端通过避雷器接地引下线接地； A neutral point arrester, the input end of which is connected to the output end of the neutral point connecting line, and the output end of which is grounded through the grounding downconductor of the arrester;
电流传感器，其套在所述的避雷器接地引下线外，用于感应所述中性点避雷器的过电压信号； A current sensor, which is set outside the grounding down conductor of the arrester, is used to sense the overvoltage signal of the neutral point arrester;
监控模块，其连接所述的电流传感器，用于采集显示电流传感器感应到的中性点避雷器的过电压信号。 The monitoring module is connected to the current sensor and is used to collect and display the overvoltage signal of the neutral point arrester sensed by the current sensor.
上述的变压器过电压在线监测系统，其中，所述的监控模块包含： The above-mentioned transformer overvoltage online monitoring system, wherein, the monitoring module includes:
信号电缆，其输入端连接所述电流传感器； a signal cable, the input end of which is connected to the current sensor;
示波器，其输入端连接所述信号电缆的输出端。 an oscilloscope, the input end of which is connected to the output end of the signal cable.
上述的变压器过电压在线监测系统，其中： The above-mentioned transformer overvoltage online monitoring system, wherein:
所述的示波器采用泰克4054示波器。 The oscilloscope adopts Tektronix 4054 oscilloscope.
上述的变压器过电压在线监测系统，其中： The above-mentioned transformer overvoltage online monitoring system, wherein:
所述的电流传感器的频带宽度为0~10MHz。 The frequency bandwidth of the current sensor is 0-10MHz.
上述的变压器过电压在线监测系统，其中： The above-mentioned transformer overvoltage online monitoring system, wherein:
所述的电流传感器的幅值范围为0~2000A。 The amplitude range of the current sensor is 0-2000A.
本实用新型与现有技术相比具有以下优点：其基于中性点避雷器工作电流来对变压器进行过电压的在线监测，方便并且安全可靠。 Compared with the prior art, the utility model has the following advantages: it conducts on-line monitoring of the overvoltage of the transformer based on the working current of the neutral point arrester, which is convenient, safe and reliable.
附图说明 Description of drawings
图1为本实用新型的整体结构示意图。 Figure 1 is a schematic diagram of the overall structure of the utility model.
具体实施方式 Detailed ways
以下结合附图，通过详细说明一个较佳的具体实施例，对本实用新型做进一步阐述。 The utility model will be further elaborated below by describing a preferred specific embodiment in detail in conjunction with the accompanying drawings.
如图1所示，一种变压器过电压在线监测系统，其与变压器连接，所述的在线监测系统包含：中性点连接线1，其输入端连接所述变压器的三相中性点；中性点避雷器2，其输入端连接所述中性点连接线1的输出端，其输出端通过避雷器接地引下线3接地；电流传感器4，其套在所述的避雷器接地引下线3外，用于感应所述中性点避雷器2的过电压信号；监控模块，其连接所述的电流传感器4，用于采集显示电流传感器4感应到的中性点避雷器2的过电压信号。 As shown in Figure 1, a kind of transformer overvoltage online monitoring system, it is connected with transformer, and described online monitoring system comprises: neutral point connection line 1, and its input end is connected with the three-phase neutral point of described transformer; Neutral point arrester 2, its input end is connected to the output end of the neutral point connection line 1, and its output end is grounded through the arrester grounding down conductor 3; the current sensor 4 is set outside the arrester grounding down conductor 3 , for sensing the overvoltage signal of the neutral point arrester 2; a monitoring module, connected to the current sensor 4, for collecting and displaying the overvoltage signal of the neutral point arrester 2 sensed by the current sensor 4.
所述的监控模块包含：信号电缆5，其输入端连接所述电流传感器4；示波器6，其输入端连接所述信号电缆5的输出端。 The monitoring module includes: a signal cable 5 whose input end is connected to the current sensor 4 ; an oscilloscope 6 whose input end is connected to the output end of the signal cable 5 .
所述的示波器6采用泰克4054示波器。 The oscilloscope 6 adopts Tektronix 4054 oscilloscope.
所述的电流传感器4的频带宽度为0~10MHz；所述的电流传感器4的幅值范围为0~2000A。 The frequency bandwidth of the current sensor 4 is 0-10MHz; the amplitude range of the current sensor 4 is 0-2000A.
该变压器过电压在线监测系统采用变压器三相中性点不接地的方式，为了防止过电压，采用中性点避雷器2将中性点与大地连接，一旦变压器遭受过电压，过电压通过中性点避雷器2导通到大地，此时中性点避雷器2会动作，在避雷器接地引下线3中会通过该动作电流，该动作电流通过电流传感器4进行传感，通过信号电缆5接入示波器6进行采集显示。正常运行时，示波器6处于等待状态，一旦有信好进入，示波器6即采集并显示过电压信好。 The transformer overvoltage online monitoring system adopts the method that the three-phase neutral point of the transformer is not grounded. In order to prevent overvoltage, the neutral point arrester 2 is used to connect the neutral point to the ground. Once the transformer suffers from overvoltage, the overvoltage passes through the neutral point. The arrester 2 is connected to the ground, and the neutral point arrester 2 will operate at this time, and the operating current will pass through the grounding downconductor 3 of the arrester. The operating current is sensed by the current sensor 4 and connected to the oscilloscope 6 through the signal cable 5 Collect and display. During normal operation, the oscilloscope 6 is in a waiting state. Once a signal enters, the oscilloscope 6 collects and displays the overvoltage signal.
尽管本实用新型的内容已经通过上述优选实施例作了详细介绍，但应当认识到上述的描述不应被认为是对本实用新型的限制。在本领域技术人员阅读了上述内容后，对于本实用新型的多种修改和替代都将是显而易见的。因此，本实用新型的保护范围应由所附的权利要求来限定。 Although the content of the present invention has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions of the present utility model will be obvious to those skilled in the art after reading the above content. Therefore, the protection scope of the present utility model should be defined by the appended claims.
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| CN201520066688.3U CN204495898U (en) | 2015-01-30 | 2015-01-30 | A kind of transformer superpotential on-line monitoring system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024631A (en) * | 2017-05-27 | 2017-08-08 | 国网上海市电力公司 | With the volt-ampere characteristic test method of Multifunctional coil kind equipment testing synthesis parameter device |
| CN107064694A (en) * | 2017-05-27 | 2017-08-18 | 国网上海市电力公司 | No-load test method based on Multifunctional coil kind equipment testing synthesis parameter device |
| CN107167683A (en) * | 2017-05-27 | 2017-09-15 | 国网上海市电力公司 | Load test method based on Multifunctional coil kind equipment testing synthesis parameter device |
| CN107167710A (en) * | 2017-05-27 | 2017-09-15 | 国网上海市电力公司 | Pressure test method based on Multifunctional coil kind equipment testing synthesis parameter device |
| CN107422201A (en) * | 2017-05-27 | 2017-12-01 | 国网上海市电力公司 | A kind of Multifunctional coil kind equipment testing synthesis parameter device |
| CN116316111A (en) * | 2023-03-22 | 2023-06-23 | 国网安徽省电力有限公司六安市城郊供电公司 | A distribution network overvoltage monitoring equipment based on optical fiber information communication |
| CN118914644A (en) * | 2024-07-12 | 2024-11-08 | 国网青海省电力公司电力科学研究院 | Transformer overvoltage monitoring method and system and electronic equipment |
-
2015
- 2015-01-30 CN CN201520066688.3U patent/CN204495898U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024631A (en) * | 2017-05-27 | 2017-08-08 | 国网上海市电力公司 | With the volt-ampere characteristic test method of Multifunctional coil kind equipment testing synthesis parameter device |
| CN107064694A (en) * | 2017-05-27 | 2017-08-18 | 国网上海市电力公司 | No-load test method based on Multifunctional coil kind equipment testing synthesis parameter device |
| CN107167683A (en) * | 2017-05-27 | 2017-09-15 | 国网上海市电力公司 | Load test method based on Multifunctional coil kind equipment testing synthesis parameter device |
| CN107167710A (en) * | 2017-05-27 | 2017-09-15 | 国网上海市电力公司 | Pressure test method based on Multifunctional coil kind equipment testing synthesis parameter device |
| CN107422201A (en) * | 2017-05-27 | 2017-12-01 | 国网上海市电力公司 | A kind of Multifunctional coil kind equipment testing synthesis parameter device |
| CN116316111A (en) * | 2023-03-22 | 2023-06-23 | 国网安徽省电力有限公司六安市城郊供电公司 | A distribution network overvoltage monitoring equipment based on optical fiber information communication |
| CN116316111B (en) * | 2023-03-22 | 2023-08-18 | 国网安徽省电力有限公司六安市城郊供电公司 | Power distribution network overvoltage monitoring equipment based on optical fiber information communication |
| CN118914644A (en) * | 2024-07-12 | 2024-11-08 | 国网青海省电力公司电力科学研究院 | Transformer overvoltage monitoring method and system and electronic equipment |
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Granted publication date: 20150722 |
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