CN202159087U - Capacitive voltage dividing impedance measuring system in partial discharge test - Google Patents
Capacitive voltage dividing impedance measuring system in partial discharge test Download PDFInfo
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- CN202159087U CN202159087U CN2011202640108U CN201120264010U CN202159087U CN 202159087 U CN202159087 U CN 202159087U CN 2011202640108 U CN2011202640108 U CN 2011202640108U CN 201120264010 U CN201120264010 U CN 201120264010U CN 202159087 U CN202159087 U CN 202159087U
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Abstract
Description
技术领域 technical field
本实用新型涉及一种局部放电试验测量阻抗，尤其涉及一种带有电容分压功能的局部放电试验测量阻抗，属于电力系统高压试验技术领域。 The utility model relates to a partial discharge test measuring impedance, in particular to a partial discharge test measuring impedance with a capacitor voltage dividing function, which belongs to the technical field of high-voltage testing of electric power systems.
背景技术 Background technique
高压电气设备进行局部放电试验时，施加电压幅值较高，如果没有进行准确的测量而导致施加电压过高，将对设备造成不必要的损坏。现场试验中，由于容升的影响，通过低压电压计算而间接得到的高压电压值是不准确的。因此，为了准确测量电压的幅值，现场经常采用电容分压器对设备高压端进行直接测量。随着设备电压等级的提升，电容分压器越来越笨重，现场的安装费时费力，很不利于现场试验的开展。 When performing partial discharge tests on high-voltage electrical equipment, the amplitude of the applied voltage is relatively high. If the applied voltage is too high due to inaccurate measurement, unnecessary damage will be caused to the equipment. In the field test, due to the influence of capacity rise, the high-voltage voltage value obtained indirectly through low-voltage voltage calculation is inaccurate. Therefore, in order to accurately measure the amplitude of the voltage, a capacitive voltage divider is often used on site to directly measure the high voltage end of the equipment. With the increase of the equipment voltage level, the capacitive voltage divider is becoming more and more bulky, and the installation on site is time-consuming and laborious, which is not conducive to the development of on-site tests.
发明内容 Contents of the invention
发明目的：本实用新型提供一种局部放电试验电容分压式测量阻抗，其目的是解决以往的电容分压器现场的安装费时费力且很不利于现场试验的问题，本实用新型在现场电气设备局部放电试验中，不采用电容分压器的情况下，方便准确的对设备的高压电压进行测量，方便现场试验的开展。 Purpose of the invention: the utility model provides a partial discharge test capacitor voltage divider measuring impedance, and its purpose is to solve the problem that the installation of the capacitor voltage divider in the past is time-consuming and laborious and is not conducive to the field test. In the partial discharge test, without using a capacitive voltage divider, it is convenient and accurate to measure the high-voltage voltage of the equipment, and it is convenient for the field test to be carried out.
技术方案：本实用新型是通过以下技术方案实现的： Technical solution: the utility model is realized through the following technical solutions:
一种局部放电试验电容分压式测量阻抗，其特征在于：所述局部放电试验测量阻抗包括电压测量端子、输入端子和传感器；电压测量端子通过低通滤波装置串联至输入端子，输入端子通过标准分压电容串联至传感器。 A partial discharge test capacitor voltage division measuring impedance, characterized in that: the partial discharge test measuring impedance includes a voltage measuring terminal, an input terminal and a sensor; the voltage measuring terminal is connected in series to the input terminal through a low-pass filter device, and the input terminal passes the standard The voltage-dividing capacitor is connected in series to the sensor.
所述低通滤波装置由标准电容分压器和电感组成；电感串联在电压测量端子与输入端子之间，标准电容分压器与电压测量端子并联后串联至电感。 The low-pass filtering device is composed of a standard capacitor voltage divider and an inductor; the inductor is connected in series between the voltage measurement terminal and the input terminal, and the standard capacitor voltage divider is connected in parallel with the voltage measurement terminal and then connected in series to the inductor.
优点及效果：本实用新型在常规的测量阻抗回路中，串联一个标准分压电容器，从而构成分压结构，在传递局放信号的同时，还能获得设备的电压信号。该电压信号通过低通滤波装置滤除高次谐波后，进入测量装置得到设备高压电压。 Advantages and effects: The utility model connects a standard voltage dividing capacitor in series in the conventional measurement impedance circuit, thereby forming a voltage dividing structure, and can obtain the voltage signal of the equipment while transmitting the partial discharge signal. After the high-order harmonics are filtered out by the low-pass filter device, the voltage signal enters the measuring device to obtain the high-voltage voltage of the equipment.
本实用新型使得现场局部放电试验中，在不使用电容分压器、不增加其它设备的前提下，能够对被试设备的高压侧电压进行直接的测量，从而得到被试设备的准确电压。 The utility model enables the on-site partial discharge test to directly measure the high-voltage side voltage of the tested equipment without using a capacitor voltage divider or adding other equipment, thereby obtaining the accurate voltage of the tested equipment.
附图说明：Description of drawings:
图1是本实用新型的结构示意图。 Fig. 1 is a structural representation of the utility model.
具体实施方式：下面结合附图对本发明做进一步的说明： The specific embodiment: the present invention will be further described below in conjunction with accompanying drawing:
如图1所示本实用新型的结构示意图，标注1是电压测量端子，2是标准电容分压器，3是电感，4是输入端子，5是标准分压电容，6是测量端子，7是并联电阻，8是传感器，9是由电容分压器和电感组成的低通滤波装置。 As shown in Fig. 1, the structure diagram of the utility model, mark 1 is the voltage measuring terminal, 2 is the standard capacitor voltage divider, 3 is the inductance, 4 is the input terminal, 5 is the standard voltage dividing capacitor, 6 is the measuring terminal, 7 is Parallel resistor, 8 is a sensor, and 9 is a low-pass filter device made up of a capacitor voltage divider and an inductance.
一种局部放电试验电容分压式测量阻抗，所述局部放电试验测量阻抗包括电压测量端子1、输入端子4和传感器8；电压测量端子1通过低通滤波装置9串联至输入端子4，输入端子4通过标准分压电容5串联至传感器8。也就是说电压测量端子1串联低通滤波装置9，低通滤波装置9串联至输入端子4，输入端子4串联标准分压电容5，标准分压电容5串联至传感器8。 A partial discharge test capacitive voltage divider measurement impedance, the partial discharge test measurement impedance includes a voltage measurement terminal 1, an input terminal 4 and a sensor 8; the voltage measurement terminal 1 is connected in series to the input terminal 4 through a low-pass filter device 9, and the input terminal 4 is connected in series to the sensor 8 through the standard voltage dividing capacitor 5 . That is to say, the voltage measurement terminal 1 is connected in series with the low-pass filter device 9 , the low-pass filter device 9 is connected in series with the input terminal 4 , the input terminal 4 is connected in series with the standard voltage dividing capacitor 5 , and the standard voltage dividing capacitor 5 is connected in series with the sensor 8 .
所述低通滤波装置9由标准电容分压器2和电感3组成；电感3串联在电压测量端子1与输入端子4之间，标准电容分压器2与电压测量端子1并联后串联至电感3。 The low-pass filtering device 9 is composed of a standard capacitor voltage divider 2 and an inductor 3; the inductor 3 is connected in series between the voltage measurement terminal 1 and the input terminal 4, and the standard capacitor voltage divider 2 is connected in parallel with the voltage measurement terminal 1 and then connected in series to the inductor 3.
实际操作试验过程中，输入端子4通过耦合电容与被试设备的高压端相连，被试设备的工频电压信号以及高频局放信号由输入端子4输入，其中高频的局放信号通过传感器8传至传感器的二次侧，在由二次侧的RLC型检测阻抗传递至测量仪器。而工频电压信号则通过低通滤波装置9进行过滤后，由同轴电缆输入到仪器进行测量。标准分压电容5与耦合电容组成电容分压器使电压测量成为可能。 During the actual operation test, the input terminal 4 is connected to the high-voltage end of the equipment under test through a coupling capacitor. The power frequency voltage signal and high-frequency partial discharge signal of the equipment under test are input from the input terminal 4, and the high-frequency partial discharge signal passes through the sensor. 8 is transmitted to the secondary side of the sensor, and then transmitted to the measuring instrument by the RLC type detection impedance of the secondary side. The power frequency voltage signal is filtered by the low-pass filter device 9 and then input to the instrument by the coaxial cable for measurement. The standard voltage dividing capacitor 5 and the coupling capacitor form a capacitive voltage divider to make voltage measurement possible.
该装置在使用时，只要将耦合电容端子与输入端子4相连，就可在测量局部放电信号的同时，通过同轴电缆在电压测量端子1处获得工频电压信号进行电压测量，避免了使用电容分压器的麻烦，方便现场试验的开展。 When the device is in use, as long as the coupling capacitor terminal is connected to the input terminal 4, while measuring the partial discharge signal, the power frequency voltage signal can be obtained at the voltage measurement terminal 1 through the coaxial cable for voltage measurement, avoiding the use of capacitors The trouble of the voltage divider is convenient for carrying out field tests.
该实用新型结构简洁合理，效果明显，利于推广应用。 The utility model has simple and reasonable structure, obvious effect and is beneficial to popularization and application.
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| CN2011202640108U CN202159087U (en) | 2011-07-25 | 2011-07-25 | Capacitive voltage dividing impedance measuring system in partial discharge test |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954890A (en) * | 2014-04-10 | 2014-07-30 | 国家电网公司 | DC partial discharge detection device and method for converter transformer |
| CN105699868A (en) * | 2016-03-08 | 2016-06-22 | 北京华天机电研究所有限公司 | Online monitoring system for power grid |
-
2011
- 2011-07-25 CN CN2011202640108U patent/CN202159087U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954890A (en) * | 2014-04-10 | 2014-07-30 | 国家电网公司 | DC partial discharge detection device and method for converter transformer |
| CN105699868A (en) * | 2016-03-08 | 2016-06-22 | 北京华天机电研究所有限公司 | Online monitoring system for power grid |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: LIAONING ELECTRIC POWER COMPANY LTD ELECTRIC POWER Effective date: 20121026 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20121026 Address after: Heping District, Siping City of Shenyang province Liaoning 110006 Street No. 39 Patentee after: Northeast Electric Power Research Institute Co., Ltd. Patentee after: Liaoning Electric Power Co., Ltd.Electric Power Science Research Institute Patentee after: State Grid Corporation of China Address before: Heping District, Siping City of Shenyang province Liaoning 110006 Street No. 39 Patentee before: Northeast Electric Power Research Institute Co., Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20120307 |
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| CX01 | Expiry of patent term |