Supercritical Boiler Tube Wall Temperature Test Base on the Power Plant Control System Database

In order to precisely learn the working condition of 600MW supercritical boiler, new temperature measuring points are set on the super-heater tube wall inner the flue. Since the working condition of 600MW supercritical boiler is quite severe, the temperature measuring points can only be used for short-term test. The data acquisition can be carried out automatically and a data storage system is required. The system is composed of measuring points, (thermocouple), data acquisition panel (A/D card), the data servers, industrial computer and other auxiliaries. The testing method in this paper integrates the database of the thermal power control system, by using the existing control system. The signals are directly sent to the redundant channel of the power plant control system. This method only requires new measuring points (thermocouple). The test data can be loaded directly from the SIS database, which saves not only money but also the work.