The application discloses a kind of
simulation method and device of building
grounding grid, wherein, method includes: step S1, according to existing building power
system, using PEEC to establish the electrical parameter model of building
grounding grid;Step S2, according to the electrical parameter obtained from the electrical parameter model, establish building
grounding grid multi-port network
equivalent circuit model;Step S3, using PEEC to obtain the ground potential distribution curve of grounding grid, for calculating the contact
voltage and step
voltage of
human body;Step S4, according to
building model and ground potential distribution curve, the
electric shock risk of
human body is evaluated.The application adopts the method that PEEC
algorithm and multi-port network
equivalent circuit model are combined, carries out
modeling and simulation calculation to the complex grounding
system of building group, can evaluate the contact
voltage and step voltage of
human body under fault condition, realizes the analysis to
electric shock risk;Meanwhile, it will help the design of low-voltage grounding
system and the configuration of leakage protector, low-voltage
circuit breaker etc.