A method of operating a voltage stabilizer electric heater

Abstract

The invention relates to the technical field of nuclear power plant electrical maintenance, in particular to an operation method of an electric heater for a voltage stabilizer. The operation method is as follows: the voltage stabilizer electric heater is divided into several intervals on average, and one electric heater is selected from each interval to form a group, forming a group W; in the first cycle, a group of voltage stabilizer is selected Electric heaters are marked as long-term group electric heaters, and other groups of regulator electric heaters are marked as short-term group electric heaters; in the 1+M cycle, select a group that has not been marked as long-term group electric heaters The electric heaters of the voltage regulators are marked as long-term group electric heaters in the 1+M period, and the electric heaters of other groups of voltage regulators are marked as short-term group electric heaters; when a group of voltage regulator electric heaters is marked Once used as a long-term group electric heater and W-1 time as a short-term group electric heater, replace the group of regulator electric heaters. The operating method improves the utilization rate of the electric heater of the voltage stabilizer and reduces the failure rate.

Description

Technical field [0001] The present invention relates to the technical field of electrical maintenance of nuclear power plants, in particular, it relates to a method for operating an electric heater regulator. Background technique [0002] Reactor Plant regulator is a key loop pressure maintenance apparatus stocked with aqueous two-phase (water and steam). During normal operation of nuclear power plants, gas and water in the liquid state of dynamic equilibrium, i.e., the pressure regulator is equal to the average temperature of the coolant water saturation vapor pressure 310 ℃. And stable within the pressure regulator, the regulator and the spray valve is to rely on electric heater timely dynamic control. [0003] Voltage regulator electric heater typically divided into two evenly distributed at the bottom of the regulator, about 1.5 m from the bottom of the lower layer, the upper layer of about 2 m from the bottom. At present, the electric heater regulator fixed logic, fixed oper...

AI Technical Summary

Problems solved by technology

[0010] To sum up, the accumulative operating time of the electric heaters in the long-term group and the electric heaters in the short-term group is severely unbalanced, and the comprehensive utilization rate is low, and the electric heaters in the long-term group fail in actual operation due to the over-life operation of the electric heaters in the long-term group significantly higher rate

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