Self energy supply lightning current detection system

Abstract

The invention discloses a self energy supply lightning current detection system, which is used for being matched with a lightning rod device for use to realize the defection on relevant parameters of lightning current. The self energy supply lightning current detection system comprises a signal sampling maintaining device, an energy taking device, a single chip control unit, a hardware clock unit and a data storage unit, wherein the signal sampling maintaining device comprises a current sensing unit, a first voltage limiting protection unit and a positive / negative peak value maintaining unit which are connected in sequence, and the energy taking device comprises an energy taking coil, a front end protector, a rectifying and wave-filtering unit, a second voltage limiting protection unit, a voltage stabilizing unit and a DC / DC unit which are connected in sequence. The self energy supply lightning current detection system of the invention can continuously realize the monitoring on whether a transmission line or a building lightning rod suffers with the lightning strike or not, and can accurately record the time, the amplitude value in the occurrence of the lightning strike and the polarity, a special triggering circuit is not needed, and the invention has the characteristics of high precision, simple structure, small size, low cost, high safety and the like.

Description

technical field [0001] The invention belongs to the technical field of lightning current monitoring, and particularly relates to a self-powered lightning current detection system, which is specifically applicable to lightning current amplitude, polarity, and occurrence time of lightning rods and lightning arresters of overhead transmission lines in electric power systems, substations, and buildings. real-time monitoring. 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...

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 detection device" solves the problem of detecting 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 detection 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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