Electrical control system of crane of nuclear power plant

The invention relates to an electrical control system of a crane of a nuclear power plant, belonging to an electrical control device for a polar crane in a nuclear power plant which can satisfy signal failure demand, is non-redundant and has two PLCs. The invention mainly solves the technical difficulties of no satisfaction of signal failure demand and easy initiation of nuclear safety accidents.The technical scheme adopted by the invention is as follows: the electrical control system of the crane of the nuclear power plant comprises an operation control device, a monitoring device, two industrial computers, a main lifting motor speed detecting device and a main lifting safety brake, a master station 1 operating a programmable logic controller, and a master station 2 monitoring the programmable logic controller, wherein the master station 1 is in flexible connection with the master station 2 through a DP/DP coupler and exchange data with each other, and compares the repeated measurement data of the major posi