The invention relates to a human viscera electric loss risk assessment method considering various figures. The human viscera electric loss risk assessment method is characterized in that an assessmentsystem comprises a tower, a grounding device, an earth surface potential measurement device and an upper computer. The human viscera electric loss risk assessment method considering various figures comprises the following steps of: uniformly configuring the weight of each weight in an earth surface potential measurement device, operating an upper computer to be matched with the earth surface potential measurement device to measure potential values of two copper plates at different positions, and importing measured data into an algorithm to calculate a human viscera electric loss risk assessment factor. According to the human viscera electric loss risk assessment method, the human viscera electric loss risks and electric loss degrees under different figures and different positions can be effectively evaluated, so that timely monitoring, risk evaluation and safety improvement of safe operation of a power transmission and distribution network are realized.

Human viscera electric loss risk assessment method considering various figures

Provided is a method for evaluating the shielding failure trip-out rate of a 110 kV electricity transmission line; a test system is built, the system comprising an impulse voltage generator (11), a data measurement and analysis control module (17), a wireless current sensor (7), a coaxial cable (24), a first base tower (21), a second base tower (22), a third base tower (23), a lightning protection line (81), an A phase line (91), a B phase line (92), and a C phase line (93). On the basis of actual test results, a particle swarm algorithm is used to optimize the formula for lightning-strike shielding failure protection level, and lastly, the shielding failure trip-out rate is calculated on the basis of the optimized results. The beneficial effect of the evaluation method is that the particle swarm algorithm can be used to more realistically test the shielding failure trip-out rate of a typical 110 kV electricity transmission line.

Method for evaluating shielding failure trip-out rate of 110 kv electricity transmission line

A lightning trip rate testing method taking soil resistivity variation into account. A testing platform is constructed, comprising an impulse voltage generator (11), a data measurement and analysis control module (17), a wireless current sensor (7), a coaxial cable one (24), a coaxial cable two (9), a coaxial cable three (10), a first base tower (21), a second base tower (22), a third base tower (23), a ground wire (81), an A phase line (91), a B phase line (92), and a C phase line (93). The testing method is: connecting coaxial cable one (24) to the impulse voltage generator (11) and a two-way contact (8), connecting the other end of the two-way contact (8) separately to the C phase line (93) and the top of a tower, wrapping the wireless current sensor (7) on coaxial cable one (24), feeding back measurement data from the wireless current sensor (7) to the data measurement and analysis control module (17), and calculating a lighting trip rate. The present method is able to effectively calculate the lightning trip rate of a power transmission line under different soil resistivity conditions, thereby implementing lightning strike safety evaluation of power transmission lines and tower structures.

Lightning trip rate testing method taking soil resistivity variation into account

The invention discloses a method for monitoring and evaluating the state of a power transmission tower under lightning stroke. The method is characterized in that a state monitoring device of the power transmission tower is built and mainly comprises an upper computer, a wireless receiving module, a lightning stroke voltage signal collector, a voltage divider, a coaxial cable, a cable lead, a grounding down conductor, an insulating supporting rod, a grounding sub-module, a lightning impulse simulation device, a braided copper strip, a wireless current collector, a same-tower double-feedback power transmission tower and a grounding copper plate; the power transmission tower under the lightning stroke is simulated based on the built state detection device, a lightning voltage signal at the top end of the tower and a lightning current signal on the braided copper strip are obtained at the same time, and state evaluation is conducted on the power transmission tower by calculating a state evaluation factor of the tower. According to the method, the working condition of the power transmission tower under the lightning stroke can be simulated, state monitoring is carried out, safety evaluation is carried out on the transmission tower according to the test result, and guidance can be further provided for safety protection, maintenance and overhaul of the transmission tower.

Method for monitoring and evaluating state of power transmission tower under lightning stroke

The invention provides a lightning trip-out rate test method considering line soil resistivity differentiation The method is characterized in that a test platform is built, and the test platform comprises an impulse voltage generator, a data measurement analysis control module, a wireless current sensor, a coaxial cable I, a coaxial cable II, a coaxial cable III, a first base tower, a second basetower, a third base tower, a lightning conductor, an A-phase line, a B-phase line and a C-phase line The test method comprises the steps that the coaxial cable I is connected with the impulse voltage generator and a bidirectional contact; the other end of the bidirectional contact is connected with the C-phase line and the tops of the towers; a generator connecting line is surrounded by the wireless current sensor; measurement data are fed back to the data measurement analysis control module through the wireless current sensor; and the lightning trip-out rate is obtained through calculationAccording to the invention, the lightning trip-out rate of a power transmission line under different soil resistivity conditions can be effectively calculated, so that lightning safety evaluation ofthe power transmission line and the tower structure can be realized

Lightning trip-out rate test method considering line soil resistivity differentiation

The invention provides a mountainous region power transmission line counterattack trip-out rate test method. The method is characterized in that a test platform is built; the test platform comprises awireless current sensor, an impulse voltage generator, a control and measurement analysis system, a first tower, a second tower, a third tower, coaxial cables, a first lightning conductor, a second lightning conductor, an A-phase power transmission line, a B-phase power transmission line and a C-phase power transmission line. Testing and theoretical value calculation are carried out on the lightning resistance level values of the towers in a high-soil-resistivity region, a higher-soil-resistivity region and an extra-high-soil-resistivity region respectively, and then a particle swarm optimization algorithm is adopted for optimizing a lightning resistance level calculation formula. Finally, the optimized lightning resistance level calculation formula is utilized for calculating the counterattack trip-out rate. The method provided by the invention has the beneficial effect that the counterattack trip-out rate of the power transmission lines in a mountainous region can be tested more truly and reliably by using the particle swarm algorithm.

Mountainous region power transmission line counterattack trip-out rate test method

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Lightning trip-out rate test method considering line soil resistivity differentiation

Mountainous region power transmission line counterattack trip-out rate test method

Lightning trip rate testing method taking soil resistivity variation into account