Device for measuring wide-frequency electric field
An electric field measurement and broadband technology, applied in measurement devices, measurement of electrical variables, electromagnetic field characteristics, etc., can solve the problems of inability to provide lightning protection measures, the bandwidth limitation of integrating circuits, and the inability to fully meet the requirements for broadband measurement of lightning discharge electric fields in the near area. Achieve effective lightning protection measures, avoid limited measurement bandwidth, and meet the needs of broadband measurement
Pending Publication Date: 2018-02-16
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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[0006] The bandwidth range of the lightning electric field can reach the order of MHz. However, due to the limitation of the bandwidth of the integrating circuit, a fast and slow lightning electric field variation instrument must be used to measure the broadband lightning field at the same time, so as to capture the quasi-static field components of the lightning electric field at the same time In addition, even if the above-mentioned fast and slow electric field change instruments are used at the same time, the bandwidth that can be measured by the fast and slow electric field change instruments while working at the same time is still less than 5MHz
[0007] Therefore, the above-mentioned traditional fast and slow lightning electric field variometers cannot fully meet the broadband measurement requirements of the lightning discharge electric field in the near area, resulting in the inability to provide effective lightning protection measures based on the measured data
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[0032] The device for measuring the broadband electric field provided by the embodiment of the present application will be described in detail below with reference to the accompanying drawings.
[0033] In addition, the terms "including" and "having" mentioned in the description of the present application and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes other unlisted steps or units, or optionally also includes Other steps or elements inherent to the process, method, product or apparatus are included.
[0034] It should be noted that, in the embodiments of the present application, words such as "exemplary" or "for example" are used as examples, illustrations or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in the embodiments of the present app...
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The invention provides a device for measuring a wide-frequency electric field, wherein the device relates to the field of electric field measuring technology. The device can measure a low-frequency quasistatic electric field component and a high-frequency radiation electric field component of a wide-frequency lightning field. The device comprises a sensing electrode, a shielding housing, a secondary voltage shunting capacitor and a voltage sensor. The shielding housing is grounded. The shielding housing is connected with the sensing electrode through an insulating material. The secondary voltage shunting capacitor and the voltage sensor are arranged in the shielding housing. The sensing electrode is connected with the high-voltage end of the secondary voltage shunting capacitor. The secondary voltage shunting capacitor is parallelly connected with the voltage sensor.
Description
technical field [0001] The present application relates to the technical field of electric field measurement, in particular to a device for wideband electric field measurement. Background technique [0002] Lightning is one of the top ten natural disasters announced by the United Nations. Lightning discharge has a strong interference and damage effect on railway traffic, high-voltage transmission lines and other facilities. In order to better predict lightning, it is necessary to conduct corresponding research on the physical effects of lightning. Among them, measuring the electric field waveform generated by lightning discharge is one of the most basic means to study and understand the physical effects of lightning discharge. [0003] At present, fast and slow electric field changers are mainly used to measure the lightning discharge electric field. Among them, the working principle of the fast electric field change instrument is basically the same as that of the slow ele...
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IPC IPC(8): G01R29/08
CPCG01R29/0842G01R29/0871G01R29/0885
Inventor 刘刚蔡汉生贾磊胡上茂施健冯宾张义廖民传胡泰山屈路李瑞显
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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