Method for preventing thermal resistor protection failure of thermal power plant DCS

Abstract

The invention belongs to the technical field of thermal generator unit automatic control, especially relates to a method for preventing thermal resistor protection failure of a thermal power plant DCS (Distributed Control System), and specifically relates to a method for preventing thermal resistor temperature protection failure of a thermal generator set. The method can be used to reform a thermal generator unit thermal resistor temperature protection system so as to improve the ability of the unit thermal process protection system to prevent misoperation. A thermal resistor temperature protection system of main and auxiliary equipment of a thermal power plant is taken as an optimized design object, false signals produced due to open circuit or virtual connection of a thermal resistor signal line are shielded, and the phenomenon that the temperature signal of the thermal resistor rises too fast and causes equipment mis-tripping is prevented. The method has the distinctive characteristics of simple field debugging process and easy project implementation. The reliability of the unit DCS thermal process protection system is improved effectively. The occurrence probability of misoperation events is reduced. The occurrence of unit tripping and equipment damage accidents is reduced. The number of non-stop times of the unit is reduced. The cost is lowered. The profit margin is improved. The method is of importance significance to improving the operation safety and economy of thermal generator units.

Description

technical field [0001] The invention belongs to the technical field of automatic control of thermal power generating sets, and in particular relates to a method for preventing failure of thermal resistance protection in a DCS system of a thermal power plant, in particular to a method for preventing thermal resistance temperature protection failure of thermal power generating sets, which can be used for thermal resistance temperature protection of thermal power generating sets The rectification of the system improves the ability of the thermal protection system of the unit to prevent malfunction. Background technique [0002] There are a large number of thermal resistance temperature protection programs in the decentralized control system DCS of modern thermal power generation units. The thermal protection of the bearing temperature of the important main and auxiliary machines of the unit is a very important and indispensable part of the thermal power plant. The reliability a...

AI Technical Summary

Problems solved by technology

If the thermal resistance signal is open, the signal will become larger instantly, if not restricted, it will directly cause the equipment to trip incorrectly

[0004] According to relevant statistics, regardless of whether it is an infrastructure unit or a production and operation unit, due to thermal resistance signal open circuit disconnection, false connection, and inspection point maintenance, etc., the protection system malfunctions occur from time to time, which will cause certain harm to the normal operation of the unit and cause damage to the unit. Enterprises suffer unnecessary economic losses, how to prevent the thermal resistance temperature protection failure in the unit DCS system has become a problem to be solved in the thermal resistance temperature protection, and its rectification will be very necessary

Images