Control method and system for water-cooled turbine rotor cooling air system of M701F4 gas turbine

• Main Authors: GAO QINGHUA, LONG ZEFEI, ZHANG YANGCHAO, FANG FUMING, TAN ZHONGKAI, CHEN JIANSEN, LI NING, ZHANG HENG, CHEN SHANSEN, ZENG MINDONG, RUAN WENDI, LI CHUN, ZHENG GUANGLU, ZHANG JINWEI, WANG XIANTIAN, ZU WEIXIN, LI LINHAO
• Format: Patent
• Language: Chinese; English
• Published: 03.01.2023
• Subjects: AIR INTAKES FOR JET-PROPULSION PLANTS; BLASTING; COMBUSTION ENGINES; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS; ENGINE PLANTS IN GENERAL; GAS-TURBINE PLANTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; STEAM ENGINES; WEAPONS

The invention belongs to the field of gas turbines, and discloses a control method for a water-cooled turbine rotor cooling air system of an M701F4 gas turbine, which comprises the following steps: step 1, when the gas turbine is started to 3000rpm, the feed water flow of a water inlet of a water-cooled TCA cooler is determined according to the water temperature of the inlet; 2, the grid is connected to 50 MW, and the inlet flow of the water-cooled TCA cooler is controlled by a condenser side valve according to the load of a gas turbine; 3, connecting the grid to 50-100MW, and starting to gradually open a valve from the water-cooled TCA cooler to the high-pressure steam pocket; and 4, when the grid connection is performed to 100MW-100%, the inlet flow of the water-cooled TCA cooler is determined according to the load of the gas turbine and is controlled by a high-pressure steam pocket side valve. By comparing the performance of the unit adopting the air-cooled TCA cooler and the water-cooled TCA cooler, the c