Discharge current monitoring device of lightning arrester
A technology of discharge current and monitoring device, applied in the direction of measuring device, measuring current/voltage, instrument, etc., can solve the problem of not recording the moment of arrester action, unable to obtain waveform information, unable to meet the requirements of arrester discharge current monitoring, etc. The installation point is flexible and convenient, not easy to lose, and the effect of solving the time error
Active Publication Date: 2013-03-27
CHINA ELECTRIC POWER RES INST +1
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Problems solved by technology
This utility model can monitor the operation times and discharge current amplitude of the line arrester in real time, but it does not record the moment when the arrester operates, and can only simply obtain the current amplitude, let alone obtain more detailed waveform information
It can be seen that the functions of these arrester discharge current monitoring devices are very simple and cannot meet the requirements for monitoring the arrester discharge current.
In addition, there are very few related products and patents for installing sensors in the arrester discharge channel to obtain lightning current parameters
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[0028] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0029] Such as figure 1 with figure 2 A discharge current monitoring device for an arrester is provided, the device includes a discharge current monitoring unit and a data receiving terminal; the discharge current monitoring unit transmits the monitored discharge current information to the data receiving terminal through an ISM wireless data transmission unit; The discharge current information includes amplitude, polarity, waveform and GPS time.
[0030] The discharge current monitoring unit includes a current sensor, a signal attenuator, a signal conditioning circuit, an A / D acquisition circuit, a trigger circuit, a CPU processor, an ISM wireless data transmission unit, a GPS time receiving unit, a clock chip and a data storage unit; The signal attenuator includes a signal attenuator A and a signal attenuator B, and the signal conditioning circuit include...
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The invention provides a discharge current monitoring device of a lightning arrester. The discharge current monitoring device comprises discharge current monitoring units and a data receiving terminal; each discharge current monitoring unit transmits monitored discharge current information to the data receiving terminal via an ISM (industrial scientific medical) wireless data transmission unit; and the discharge current information contains amplitude, polarity, waveform and GPS (global positioning system) time information. Each discharge current monitoring unit is in bidirectional wireless communication with the data receiving terminal, and the data receiving terminal can access the discharge current monitoring units at any time to know running states of the discharge current monitoring units. The discharge current monitoring device is simple in structure and convenient to maintain, shortcomings of current discharge current monitoring for lightning arresters in the field of online monitoring for the lightning arrestors are overcome, and an excellent approach to acquiring lightning current parameters for lightning discharge monitoring and research is provided.
Description
technical field [0001] The invention belongs to the technical field of on-line monitoring and lightning monitoring of lightning arresters in power systems, and in particular relates to a discharge current monitoring device for lightning arresters. Background technique [0002] Surge arrester is one of the main equipment for power system equipment to protect lightning overvoltage and system operation overvoltage. As far as the working characteristics of the arrester are concerned, it is to sacrifice itself to protect other equipment. However, the flow of tens of thousands of amperes of high current or the continuous flow of thousands of amperes of current in a short period of time will cause irreversible damage to the internal nonlinear valve. By monitoring and recording the waveform of the discharge current when the arrester operates , amplitude, and discharge times can be calculated to obtain the discharge energy of the current flowing through the arrester, so as to provid...
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IPC IPC(8): G01R19/00
Inventor 张波康文斌戴敏谷定燮彭庆华梅刚查志鹏王磊
Owner CHINA ELECTRIC POWER RES INST
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