Online soft measuring device and method for main steam flow of steam turbine in thermal power plant

• Main Authors: WANG YINHE, ZENG WEISHENG, REN ZILONG, HU RONG, YIN XIAOFENG, ZHOU HONGGUI, LIU WENZHE, ZHANG QINGYONG, LI HAOCAI
• Format: Patent
• Language: Chinese; English
• Published: 17.01.2020
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING

The invention discloses an online soft measuring device and method for main steam flow of a steam turbine in a thermal power plant. The measuring device comprises a data acquisition module, a computing configuration and processing module and a calculation result storage module that are connected in sequence; and the measuring method comprises the following steps of S1, counting typical variable condition test data of a steam turbine unit; S2, calculating the reference condition coefficient ki corresponding to the stream inlet pressure P1i of the steam turbine unit under any typical condition of the steam turbine unit; S3, sorting n sets (P1i, ki) of data according to the order of the steam inlet pressure P1i of the steam turbine unit from small to large, and establishing a linear interpolation function k=f(P1) of the reference condition coefficient k with P1; and S4, collecting real-time running parameters of the steam turbine unit, and calculating the main steam flow Gm under variableconditions according to