A method for matching power supply voltage of nuclear power plant sensors

Abstract

The invention relates to a nuclear power plant sensor supply voltage matching method. The method includes the following steps that: step S1, a new secondary loop board (3) is adopted to replace an old secondary loop board, wherein the power supply voltage of the new secondary loop board (3) is greater than the power supply voltage of the old secondary loop board and the working voltage range of an in-situ sensor; and step S2, a voltage dividing electronic component (2) is arranged between the new secondary loop board (3) and the in-situ sensor, so that the power supply voltage outputted by the new secondary loop board (3) is subjected to voltage division of the voltage dividing electronic component (2), so that obtained power source output voltage can be within the working voltage range of the in-situ sensor. The nuclear power plant sensor supply voltage matching method of the invention has the advantages of ingenuity and high practicability.

Description

technical field [0001] The invention relates to the field of nuclear power plant equipment, in particular to a method for matching power supply voltage of a sensor in a nuclear power plant. Background technique [0002] The instrument measurement circuit of a nuclear power plant is generally composed of on-site sensors and the secondary circuit boards of the cabinet; in the initial construction stage of the nuclear power plant, the on-site sensors and the secondary circuit boards generally use the same brand of products, and the two are at the same voltage level. It completely matches the transmission signal and so on. However, in the equipment replacement and upgrading of nuclear power plants, the inventory of on-site sensors is sufficient and production has not been stopped, while the inventory of secondary circuit boards is insufficient and production has been stopped; at this time, it is necessary to upgrade the secondary circuit boards, And retain the local sensor. Ho...

AI Technical Summary

Problems solved by technology

However, in the equipment replacement and upgrading of nuclear power plants, the inventory of on-site sensors is sufficient and production has not been stopped, while the inventory of secondary circuit boards is insufficient and production has been stopped; at this time, it is necessary to upgrade the secondary circuit boards, and keep in-situ sensor

However, there is an obvious technical problem in using the new secondary circuit board, that is, the brand of the on-site sensor and the new secondary circuit board are different, which will cause the power supply voltage and There are differences in the working voltage range required by the on-site sensor. Generally speaking, the power supply voltage of the new secondary circuit board used is greater than the working voltage range of the on-site sensor; in addition, due to factors such as limited on-site installation space, the on-site A more complex voltage divider device cannot be installed between the sensor and the secondary circuit board, so it is necessary to invent a more suitable and easy-to-implement nuclear power plant sensor power supply voltage matching method based on the actual situation on site

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