Lightning current detecting device

Abstract

The invention discloses a lightning current detecting device which comprises a signal conditioning unit, an energy taking unit and a collecting unit. The lightning current detecting device can directly use lightning stroke energy on overhead transmission lines or lightning conductors, and the lightning stroke energy can be coupled by an energy taking coil to obtain power finally. Monitoring equipment can be driven without external power supply to provide energy. The lightning current detecting device can guarantee stable, continuous and real-time monitoring for a long time without taking the situation where the lighting stroke cannot be monitored due to the fact that external power is insufficient to cause equipment failure into consideration. The lightning current detecting device can accurately record time, amplitude and polarity of the lightning stroke. The lightning current detecting device removes a special trigger circuit and has the advantages of being high in accuracy, simple in structure, small in size, low in cost, high in safety and the like. In addition, the lightning current detecting device has the advantages of being simple in structure, small in size, light in weight, capable of taking energy conveniently, convenient to install, flexible to adjustable and the like.

Description

technical field [0001] The invention belongs to the technical field of lightning current monitoring, and in particular relates to a lightning current detection device, which is specifically applicable to the real-time monitoring of lightning current amplitude, polarity, and occurrence time of lightning rods and lightning arresters of overhead transmission lines, substations, and buildings in electric power systems . Background technique [0002] With the development of the national economy, the voltage level and scale of the power system develop and expand rapidly. The overhead transmission lines of the power system are widely distributed and are easily attacked by lightning. Substations and buildings are often attacked by lightning. Due to the randomness and shortness of occurrence, it is particularly important to accurately locate the time and characteristics of lightning current occurrence. The parameter characteristics of lightning current are of great significance to d...

AI Technical Summary

Problems solved by technology

The advantage of this method is that the cost is low and it is easy to install in large quantities, but the disadvantage is that the formula of the magnetic steel rod and the production process are scattered, and the measurement results themselves have large errors, and the time of lightning occurrence cannot be recorded, and only a single record can be obtained to obtain data inconvenient, heavy workload

[0004] Utility model 200720173616.4 "a lightning current monitoring device" solves the problem of monitoring whether the arrester is struck by lightning. Although the device has a simple structure and low cost, it can only indicate whether the arrester has been struck by lightning, and cannot accurately locate the time, polarity and The magnitude of the amplitude, and the placement position will interfere with the magnetic field of the device itself, affecting the measurement accuracy

[0005] Chinese Invention Patent 200710169010.8 "A Lightning Current Measurement Method and Device" Although two-way wireless communication is adopted, the multi-channel front-end measurement recorder can be used to measure and record the lightning current amplitude, steepness, polarity and lightning strike when a lightning strike occurs time, but its energy supply part requires additional batteries or solar power, in case of rainy weather or insufficient battery power, its measurement method will be greatly limited, and long-term real-time monitoring cannot be carried out

Similarly, China's new utility 200820191482.3 "overhead transmission line and lightning rod lightning current full parameter on-line monitoring device" also uses solar panels, batteries and transformers for its energy supply. In rainy weather or when the battery power is low, the method will also be greatly limited

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