Reinforced concrete tower power frequency follow current fault step voltage alarm method and system

Abstract

The invention relates to a reinforced concrete tower power frequency follow current fault step voltage alarm method and system, and belongs to the technical field of power system grounding analysis. According to the method, the potential value of a fault current at any point on the surface of a soil area near a tower is calculated, then the current value of a human body flowing through is obtainedby utilizing the potential difference between any two points on the earth surface with the distance of 1m, and finally a step voltage dangerous area is divided according to the bearable current of the human body. According to the invention, a dangerous area causing an electric shock accident of a human body can be divided, sound signal and light signal alarm is carried out through the alarm system, and dangerous area projection can be carried out on the ground, so that alarm of the step voltage of the power frequency follow current fault of the reinforced concrete tower is realized.

Description

technical field [0001] The invention belongs to the technical field of power system grounding analysis, and in particular relates to a step voltage alarm method and system for reinforced concrete tower power frequency freewheeling faults. Background technique [0002] Most of the faults in the power system occur in the distribution network area, and most of the lines are outdoors and widely distributed. The most common form of fault in the power distribution system is the ground fault, which usually occurs in wet and rainy weather. When the fault occurs, the fault line will cause step voltage to be generated on the surrounding ground, and the cable line is widely used today, causing the capacitive current to increase when the short circuit occurs. , so that the step voltage also increases accordingly, which seriously threatens the personal health and safety of surrounding staff and residents. [0003] It has always been a difficult problem to solve the power frequency freew...

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Problems solved by technology

At present, there have been many researches on power-frequency freewheeling faults in distribution networks at home and abroad. Researchers in related fields in my country have done research on step voltage, and have done simple research on s

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